diff options
Diffstat (limited to 'libPCMutils/src')
| -rw-r--r-- | libPCMutils/src/limiter.cpp | 588 | ||||
| -rw-r--r-- | libPCMutils/src/pcm_utils.cpp | 195 | ||||
| -rw-r--r-- | libPCMutils/src/pcmdmx_lib.cpp | 2659 | ||||
| -rw-r--r-- | libPCMutils/src/pcmutils_lib.cpp | 2510 | ||||
| -rw-r--r-- | libPCMutils/src/version.h | 119 |
5 files changed, 3303 insertions, 2768 deletions
diff --git a/libPCMutils/src/limiter.cpp b/libPCMutils/src/limiter.cpp index af724f0..a799a51 100644 --- a/libPCMutils/src/limiter.cpp +++ b/libPCMutils/src/limiter.cpp @@ -1,74 +1,85 @@ - -/* ----------------------------------------------------------------------------------------------------------- +/* ----------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android -© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. - All rights reserved. +© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten +Forschung e.V. All rights reserved. 1. INTRODUCTION -The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements -the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. -This FDK AAC Codec software is intended to be used on a wide variety of Android devices. - -AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual -audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by -independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part -of the MPEG specifications. - -Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) -may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners -individually for the purpose of encoding or decoding bit streams in products that are compliant with -the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license -these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec -software may already be covered under those patent licenses when it is used for those licensed purposes only. - -Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, -are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional -applications information and documentation. +The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software +that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding +scheme for digital audio. This FDK AAC Codec software is intended to be used on +a wide variety of Android devices. + +AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient +general perceptual audio codecs. AAC-ELD is considered the best-performing +full-bandwidth communications codec by independent studies and is widely +deployed. AAC has been standardized by ISO and IEC as part of the MPEG +specifications. + +Patent licenses for necessary patent claims for the FDK AAC Codec (including +those of Fraunhofer) may be obtained through Via Licensing +(www.vialicensing.com) or through the respective patent owners individually for +the purpose of encoding or decoding bit streams in products that are compliant +with the ISO/IEC MPEG audio standards. Please note that most manufacturers of +Android devices already license these patent claims through Via Licensing or +directly from the patent owners, and therefore FDK AAC Codec software may +already be covered under those patent licenses when it is used for those +licensed purposes only. + +Commercially-licensed AAC software libraries, including floating-point versions +with enhanced sound quality, are also available from Fraunhofer. Users are +encouraged to check the Fraunhofer website for additional applications +information and documentation. 2. COPYRIGHT LICENSE -Redistribution and use in source and binary forms, with or without modification, are permitted without -payment of copyright license fees provided that you satisfy the following conditions: +Redistribution and use in source and binary forms, with or without modification, +are permitted without payment of copyright license fees provided that you +satisfy the following conditions: -You must retain the complete text of this software license in redistributions of the FDK AAC Codec or -your modifications thereto in source code form. +You must retain the complete text of this software license in redistributions of +the FDK AAC Codec or your modifications thereto in source code form. -You must retain the complete text of this software license in the documentation and/or other materials -provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. -You must make available free of charge copies of the complete source code of the FDK AAC Codec and your +You must retain the complete text of this software license in the documentation +and/or other materials provided with redistributions of the FDK AAC Codec or +your modifications thereto in binary form. You must make available free of +charge copies of the complete source code of the FDK AAC Codec and your modifications thereto to recipients of copies in binary form. -The name of Fraunhofer may not be used to endorse or promote products derived from this library without -prior written permission. +The name of Fraunhofer may not be used to endorse or promote products derived +from this library without prior written permission. -You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec -software or your modifications thereto. +You may not charge copyright license fees for anyone to use, copy or distribute +the FDK AAC Codec software or your modifications thereto. -Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software -and the date of any change. For modified versions of the FDK AAC Codec, the term -"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term -"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." +Your modified versions of the FDK AAC Codec must carry prominent notices stating +that you changed the software and the date of any change. For modified versions +of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" +must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK +AAC Codec Library for Android." 3. NO PATENT LICENSE -NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, -ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with -respect to this software. +NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without +limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. +Fraunhofer provides no warranty of patent non-infringement with respect to this +software. -You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized -by appropriate patent licenses. +You may use this FDK AAC Codec software or modifications thereto only for +purposes that are authorized by appropriate patent licenses. 4. DISCLAIMER -This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors -"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties -of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR -CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, -including but not limited to procurement of substitute goods or services; loss of use, data, or profits, -or business interruption, however caused and on any theory of liability, whether in contract, strict -liability, or tort (including negligence), arising in any way out of the use of this software, even if -advised of the possibility of such damage. +This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright +holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, +including but not limited to the implied warranties of merchantability and +fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR +CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, +or consequential damages, including but not limited to procurement of substitute +goods or services; loss of use, data, or profits, or business interruption, +however caused and on any theory of liability, whether in contract, strict +liability, or tort (including negligence), arising in any way out of the use of +this software, even if advised of the possibility of such damage. 5. CONTACT INFORMATION @@ -79,46 +90,28 @@ Am Wolfsmantel 33 www.iis.fraunhofer.de/amm amm-info@iis.fraunhofer.de ------------------------------------------------------------------------------------------------------------ */ +----------------------------------------------------------------------------- */ -/************************ FDK PCM postprocessor module ********************* +/**************************** PCM utility library ****************************** Author(s): Matthias Neusinger + Description: Hard limiter for clipping prevention *******************************************************************************/ #include "limiter.h" +#include "FDK_core.h" - -struct TDLimiter { - unsigned int attack; - FIXP_DBL attackConst, releaseConst; - unsigned int attackMs, releaseMs, maxAttackMs; - FIXP_PCM threshold; - unsigned int channels, maxChannels; - unsigned int sampleRate, maxSampleRate; - FIXP_DBL cor, max; - FIXP_DBL* maxBuf; - FIXP_DBL* delayBuf; - unsigned int maxBufIdx, delayBufIdx; - FIXP_DBL smoothState0; - FIXP_DBL minGain; - - FIXP_DBL additionalGainPrev; - FIXP_DBL additionalGainFilterState; - FIXP_DBL additionalGainFilterState1; -}; +/* library version */ +#include "version.h" +/* library title */ +#define TDLIMIT_LIB_TITLE "TD Limiter Lib" /* create limiter */ -TDLimiterPtr createLimiter( - unsigned int maxAttackMs, - unsigned int releaseMs, - INT_PCM threshold, - unsigned int maxChannels, - unsigned int maxSampleRate - ) -{ +TDLimiterPtr pcmLimiter_Create(unsigned int maxAttackMs, unsigned int releaseMs, + FIXP_DBL threshold, unsigned int maxChannels, + UINT maxSampleRate) { TDLimiterPtr limiter = NULL; unsigned int attack, release; FIXP_DBL attackConst, releaseConst, exponent; @@ -133,16 +126,17 @@ TDLimiterPtr createLimiter( if (!limiter) return NULL; /* alloc max and delay buffers */ - limiter->maxBuf = (FIXP_DBL*)FDKcalloc(attack + 1, sizeof(FIXP_DBL)); - limiter->delayBuf = (FIXP_DBL*)FDKcalloc(attack * maxChannels, sizeof(FIXP_DBL)); + limiter->maxBuf = (FIXP_DBL*)FDKcalloc(attack + 1, sizeof(FIXP_DBL)); + limiter->delayBuf = + (FIXP_DBL*)FDKcalloc(attack * maxChannels, sizeof(FIXP_DBL)); if (!limiter->maxBuf || !limiter->delayBuf) { - destroyLimiter(limiter); + pcmLimiter_Destroy(limiter); return NULL; } /* attackConst = pow(0.1, 1.0 / (attack + 1)) */ - exponent = invFixp(attack+1); + exponent = invFixp(attack + 1); attackConst = fPow(FL2FXCONST_DBL(0.1f), 0, exponent, 0, &e_ans); attackConst = scaleValue(attackConst, e_ans); @@ -152,140 +146,107 @@ TDLimiterPtr createLimiter( releaseConst = scaleValue(releaseConst, e_ans); /* init parameters */ - limiter->attackMs = maxAttackMs; - limiter->maxAttackMs = maxAttackMs; - limiter->releaseMs = releaseMs; - limiter->attack = attack; - limiter->attackConst = attackConst; - limiter->releaseConst = releaseConst; - limiter->threshold = (FIXP_PCM)threshold; - limiter->channels = maxChannels; - limiter->maxChannels = maxChannels; - limiter->sampleRate = maxSampleRate; + limiter->attackMs = maxAttackMs; + limiter->maxAttackMs = maxAttackMs; + limiter->releaseMs = releaseMs; + limiter->attack = attack; + limiter->attackConst = attackConst; + limiter->releaseConst = releaseConst; + limiter->threshold = threshold >> TDL_GAIN_SCALING; + limiter->channels = maxChannels; + limiter->maxChannels = maxChannels; + limiter->sampleRate = maxSampleRate; limiter->maxSampleRate = maxSampleRate; - resetLimiter(limiter); + pcmLimiter_Reset(limiter); return limiter; } - -/* reset limiter */ -TDLIMITER_ERROR resetLimiter(TDLimiterPtr limiter) -{ - if (limiter != NULL) { - - limiter->maxBufIdx = 0; - limiter->delayBufIdx = 0; - limiter->max = (FIXP_DBL)0; - limiter->cor = FL2FXCONST_DBL(1.0f/(1<<1)); - limiter->smoothState0 = FL2FXCONST_DBL(1.0f/(1<<1)); - limiter->minGain = FL2FXCONST_DBL(1.0f/(1<<1)); - - limiter->additionalGainPrev = FL2FXCONST_DBL(1.0f/(1<<TDL_GAIN_SCALING)); - limiter->additionalGainFilterState = FL2FXCONST_DBL(1.0f/(1<<TDL_GAIN_SCALING)); - limiter->additionalGainFilterState1 = FL2FXCONST_DBL(1.0f/(1<<TDL_GAIN_SCALING)); - - FDKmemset(limiter->maxBuf, 0, (limiter->attack + 1) * sizeof(FIXP_DBL) ); - FDKmemset(limiter->delayBuf, 0, limiter->attack * limiter->channels * sizeof(FIXP_DBL) ); - } - else { - return TDLIMIT_INVALID_HANDLE; - } - - return TDLIMIT_OK; -} - - -/* destroy limiter */ -TDLIMITER_ERROR destroyLimiter(TDLimiterPtr limiter) -{ - if (limiter != NULL) { - FDKfree(limiter->maxBuf); - FDKfree(limiter->delayBuf); - - FDKfree(limiter); - } - else { - return TDLIMIT_INVALID_HANDLE; - } - return TDLIMIT_OK; -} - /* apply limiter */ -TDLIMITER_ERROR applyLimiter(TDLimiterPtr limiter, - INT_PCM* samples, - FIXP_DBL* pGain, - const INT* gain_scale, - const UINT gain_size, - const UINT gain_delay, - const UINT nSamples) -{ +TDLIMITER_ERROR pcmLimiter_Apply(TDLimiterPtr limiter, PCM_LIM* samplesIn, + INT_PCM* samplesOut, FIXP_DBL* RESTRICT pGain, + const INT* RESTRICT gain_scale, + const UINT gain_size, const UINT gain_delay, + const UINT nSamples) { unsigned int i, j; - FIXP_PCM tmp1, tmp2; - FIXP_DBL tmp, old, gain, additionalGain, additionalGainUnfiltered; - FIXP_DBL minGain = FL2FXCONST_DBL(1.0f/(1<<1)); + FIXP_DBL tmp1; + FIXP_DBL tmp2; + FIXP_DBL tmp, old, gain, additionalGain = 0, additionalGainUnfiltered; + FIXP_DBL minGain = FL2FXCONST_DBL(1.0f / (1 << 1)); FDK_ASSERT(gain_size == 1); FDK_ASSERT(gain_delay <= nSamples); - if ( limiter == NULL ) return TDLIMIT_INVALID_HANDLE; + if (limiter == NULL) return TDLIMIT_INVALID_HANDLE; { - unsigned int channels = limiter->channels; - unsigned int attack = limiter->attack; - FIXP_DBL attackConst = limiter->attackConst; - FIXP_DBL releaseConst = limiter->releaseConst; - FIXP_DBL threshold = FX_PCM2FX_DBL(limiter->threshold)>>TDL_GAIN_SCALING; - - FIXP_DBL max = limiter->max; - FIXP_DBL* maxBuf = limiter->maxBuf; - unsigned int maxBufIdx = limiter->maxBufIdx; - FIXP_DBL cor = limiter->cor; - FIXP_DBL* delayBuf = limiter->delayBuf; - unsigned int delayBufIdx = limiter->delayBufIdx; - - FIXP_DBL smoothState0 = limiter->smoothState0; - FIXP_DBL additionalGainSmoothState = limiter->additionalGainFilterState; - FIXP_DBL additionalGainSmoothState1 = limiter->additionalGainFilterState1; - - for (i = 0; i < nSamples; i++) { - - if (i < gain_delay) { - additionalGainUnfiltered = limiter->additionalGainPrev; - } else { - additionalGainUnfiltered = pGain[0]; - } - - /* Smooth additionalGain */ - /* [b,a] = butter(1, 0.01) */ - static const FIXP_SGL b[] = { FL2FXCONST_SGL(0.015466*2.0), FL2FXCONST_SGL( 0.015466*2.0) }; - static const FIXP_SGL a[] = { FL2FXCONST_SGL(1.000000), FL2FXCONST_SGL(-0.96907) }; - /* [b,a] = butter(1, 0.001) */ - //static const FIXP_SGL b[] = { FL2FXCONST_SGL(0.0015683*2.0), FL2FXCONST_SGL( 0.0015683*2.0) }; - //static const FIXP_SGL a[] = { FL2FXCONST_SGL(1.0000000), FL2FXCONST_SGL(-0.99686) }; - additionalGain = - fMult(additionalGainSmoothState, a[1]) + fMultDiv2( additionalGainUnfiltered, b[0]) + fMultDiv2(additionalGainSmoothState1, b[1]); - additionalGainSmoothState1 = additionalGainUnfiltered; - additionalGainSmoothState = additionalGain; - - /* Apply the additional scaling that has no delay and no smoothing */ + unsigned int channels = limiter->channels; + unsigned int attack = limiter->attack; + FIXP_DBL attackConst = limiter->attackConst; + FIXP_DBL releaseConst = limiter->releaseConst; + FIXP_DBL threshold = limiter->threshold; + + FIXP_DBL max = limiter->max; + FIXP_DBL* maxBuf = limiter->maxBuf; + unsigned int maxBufIdx = limiter->maxBufIdx; + FIXP_DBL cor = limiter->cor; + FIXP_DBL* delayBuf = limiter->delayBuf; + unsigned int delayBufIdx = limiter->delayBufIdx; + + FIXP_DBL smoothState0 = limiter->smoothState0; + FIXP_DBL additionalGainSmoothState = limiter->additionalGainFilterState; + FIXP_DBL additionalGainSmoothState1 = limiter->additionalGainFilterState1; + + if (!gain_delay) { + additionalGain = pGain[0]; if (gain_scale[0] > 0) { additionalGain <<= gain_scale[0]; } else { - additionalGain >>= gain_scale[0]; + additionalGain >>= -gain_scale[0]; } + } + + for (i = 0; i < nSamples; i++) { + if (gain_delay) { + if (i < gain_delay) { + additionalGainUnfiltered = limiter->additionalGainPrev; + } else { + additionalGainUnfiltered = pGain[0]; + } - /* get maximum absolute sample value of all channels, including the additional gain. */ - tmp1 = (FIXP_PCM)0; + /* Smooth additionalGain */ + /* [b,a] = butter(1, 0.01) */ + static const FIXP_SGL b[] = {FL2FXCONST_SGL(0.015466 * 2.0), + FL2FXCONST_SGL(0.015466 * 2.0)}; + static const FIXP_SGL a[] = {(FIXP_SGL)MAXVAL_SGL, + FL2FXCONST_SGL(-0.96907)}; + additionalGain = -fMult(additionalGainSmoothState, a[1]) + + fMultDiv2(additionalGainUnfiltered, b[0]) + + fMultDiv2(additionalGainSmoothState1, b[1]); + additionalGainSmoothState1 = additionalGainUnfiltered; + additionalGainSmoothState = additionalGain; + + /* Apply the additional scaling that has no delay and no smoothing */ + if (gain_scale[0] > 0) { + additionalGain <<= gain_scale[0]; + } else { + additionalGain >>= -gain_scale[0]; + } + } + /* get maximum absolute sample value of all channels, including the + * additional gain. */ + tmp1 = (FIXP_DBL)0; for (j = 0; j < channels; j++) { - tmp2 = (FIXP_PCM)samples[i * channels + j]; - if (tmp2 == (FIXP_PCM)SAMPLE_MIN) /* protect fAbs from -1.0 value */ - tmp2 = (FIXP_PCM)(SAMPLE_MIN+1); - tmp1 = fMax(tmp1, fAbs(tmp2)); + tmp2 = PCM_LIM2FIXP_DBL(samplesIn[j]); + tmp2 = fAbs(tmp2); + tmp2 = FIXP_DBL(INT(tmp2) ^ INT((tmp2 >> (SAMPLE_BITS_LIM - 1)))); + tmp1 = fMax(tmp1, tmp2); } - tmp = SATURATE_LEFT_SHIFT(fMultDiv2(tmp1, additionalGain), 1, DFRACT_BITS); + tmp = fMult(tmp1, additionalGain); - /* set threshold as lower border to save calculations in running maximum algorithm */ + /* set threshold as lower border to save calculations in running maximum + * algorithm */ tmp = fMax(tmp, threshold); /* running maximum */ @@ -295,75 +256,97 @@ TDLIMITER_ERROR applyLimiter(TDLimiterPtr limiter, if (tmp >= max) { /* new sample is greater than old maximum, so it is the new maximum */ max = tmp; - } - else if (old < max) { + } else if (old < max) { /* maximum does not change, as the sample, which has left the window was not the maximum */ - } - else { + } else { /* the old maximum has left the window, we have to search the complete buffer for the new max */ max = maxBuf[0]; for (j = 1; j <= attack; j++) { - if (maxBuf[j] > max) max = maxBuf[j]; + max = fMax(max, maxBuf[j]); } } maxBufIdx++; - if (maxBufIdx >= attack+1) maxBufIdx = 0; + if (maxBufIdx >= attack + 1) maxBufIdx = 0; /* calc gain */ /* gain is downscaled by one, so that gain = 1.0 can be represented */ if (max > threshold) { - gain = fDivNorm(threshold, max)>>1; - } - else { - gain = FL2FXCONST_DBL(1.0f/(1<<1)); + gain = fDivNorm(threshold, max) >> 1; + } else { + gain = FL2FXCONST_DBL(1.0f / (1 << 1)); } /* gain smoothing, method: TDL_EXPONENTIAL */ /* first order IIR filter with attack correction to avoid overshoots */ - /* correct the 'aiming' value of the exponential attack to avoid the remaining overshoot */ + /* correct the 'aiming' value of the exponential attack to avoid the + * remaining overshoot */ if (gain < smoothState0) { - cor = fMin(cor, fMultDiv2((gain - fMultDiv2(FL2FXCONST_SGL(0.1f*(1<<1)),smoothState0)), FL2FXCONST_SGL(1.11111111f/(1<<1)))<<2); - } - else { + cor = fMin(cor, + fMultDiv2((gain - fMultDiv2(FL2FXCONST_SGL(0.1f * (1 << 1)), + smoothState0)), + FL2FXCONST_SGL(1.11111111f / (1 << 1))) + << 2); + } else { cor = gain; } /* smoothing filter */ if (cor < smoothState0) { - smoothState0 = fMult(attackConst,(smoothState0 - cor)) + cor; /* attack */ + smoothState0 = + fMult(attackConst, (smoothState0 - cor)) + cor; /* attack */ smoothState0 = fMax(smoothState0, gain); /* avoid overshooting target */ - } - else { + } else { /* sign inversion twice to round towards +infinity, so that gain can converge to 1.0 again, for bit-identical output when limiter is not active */ - smoothState0 = -fMult(releaseConst,-(smoothState0 - cor)) + cor; /* release */ + smoothState0 = + -fMult(releaseConst, -(smoothState0 - cor)) + cor; /* release */ } gain = smoothState0; - /* lookahead delay, apply gain */ - for (j = 0; j < channels; j++) { - - tmp = delayBuf[delayBufIdx * channels + j]; - delayBuf[delayBufIdx * channels + j] = fMult((FIXP_PCM)samples[i * channels + j], additionalGain); + FIXP_DBL* p_delayBuf = &delayBuf[delayBufIdx * channels + 0]; + if (gain < FL2FXCONST_DBL(1.0f / (1 << 1))) { + gain <<= 1; + /* lookahead delay, apply gain */ + for (j = 0; j < channels; j++) { + tmp = p_delayBuf[j]; + p_delayBuf[j] = fMult((FIXP_PCM_LIM)samplesIn[j], additionalGain); - /* Apply gain to delayed signal */ - if (gain < FL2FXCONST_DBL(1.0f/(1<<1))) - tmp = fMult(tmp,gain<<1); + /* Apply gain to delayed signal */ + tmp = fMultDiv2(tmp, gain); - samples[i * channels + j] = FX_DBL2FX_PCM((FIXP_DBL)SATURATE_LEFT_SHIFT(tmp,TDL_GAIN_SCALING,DFRACT_BITS)); + samplesOut[j] = (INT_PCM)FX_DBL2FX_PCM((FIXP_DBL)SATURATE_LEFT_SHIFT( + tmp, TDL_GAIN_SCALING + 1, DFRACT_BITS)); + } + gain >>= 1; + } else { + /* lookahead delay, apply gain=1.0f */ + for (j = 0; j < channels; j++) { + tmp = p_delayBuf[j]; + p_delayBuf[j] = fMult((FIXP_PCM_LIM)samplesIn[j], additionalGain); + samplesOut[j] = (INT_PCM)FX_DBL2FX_PCM((FIXP_DBL)SATURATE_LEFT_SHIFT( + tmp, TDL_GAIN_SCALING, DFRACT_BITS)); + } } + delayBufIdx++; - if (delayBufIdx >= attack) delayBufIdx = 0; + if (delayBufIdx >= attack) { + delayBufIdx = 0; + } /* save minimum gain factor */ - if (gain < minGain) minGain = gain; - } + if (gain < minGain) { + minGain = gain; + } + /* advance sample pointer by <channel> samples */ + samplesIn += channels; + samplesOut += channels; + } limiter->max = max; limiter->maxBufIdx = maxBufIdx; @@ -382,34 +365,99 @@ TDLIMITER_ERROR applyLimiter(TDLimiterPtr limiter, } } +/* set limiter threshold */ +TDLIMITER_ERROR pcmLimiter_SetThreshold(TDLimiterPtr limiter, + FIXP_DBL threshold) { + if (limiter == NULL) return TDLIMIT_INVALID_HANDLE; + + limiter->threshold = threshold >> TDL_GAIN_SCALING; + + return TDLIMIT_OK; +} + +/* reset limiter */ +TDLIMITER_ERROR pcmLimiter_Reset(TDLimiterPtr limiter) { + if (limiter != NULL) { + limiter->maxBufIdx = 0; + limiter->delayBufIdx = 0; + limiter->max = (FIXP_DBL)0; + limiter->cor = FL2FXCONST_DBL(1.0f / (1 << 1)); + limiter->smoothState0 = FL2FXCONST_DBL(1.0f / (1 << 1)); + limiter->minGain = FL2FXCONST_DBL(1.0f / (1 << 1)); + + limiter->additionalGainPrev = + FL2FXCONST_DBL(1.0f / (1 << TDL_GAIN_SCALING)); + limiter->additionalGainFilterState = + FL2FXCONST_DBL(1.0f / (1 << TDL_GAIN_SCALING)); + limiter->additionalGainFilterState1 = + FL2FXCONST_DBL(1.0f / (1 << TDL_GAIN_SCALING)); + + FDKmemset(limiter->maxBuf, 0, (limiter->attack + 1) * sizeof(FIXP_DBL)); + FDKmemset(limiter->delayBuf, 0, + limiter->attack * limiter->channels * sizeof(FIXP_DBL)); + } else { + return TDLIMIT_INVALID_HANDLE; + } + + return TDLIMIT_OK; +} + +/* destroy limiter */ +TDLIMITER_ERROR pcmLimiter_Destroy(TDLimiterPtr limiter) { + if (limiter != NULL) { + FDKfree(limiter->maxBuf); + FDKfree(limiter->delayBuf); + + FDKfree(limiter); + } else { + return TDLIMIT_INVALID_HANDLE; + } + return TDLIMIT_OK; +} + /* get delay in samples */ -unsigned int getLimiterDelay(TDLimiterPtr limiter) -{ +unsigned int pcmLimiter_GetDelay(TDLimiterPtr limiter) { FDK_ASSERT(limiter != NULL); return limiter->attack; } +/* get maximum gain reduction of last processed block */ +INT pcmLimiter_GetMaxGainReduction(TDLimiterPtr limiter) { + /* maximum gain reduction in dB = -20 * log10(limiter->minGain) + = -20 * log2(limiter->minGain)/log2(10) = -6.0206*log2(limiter->minGain) */ + int e_ans; + FIXP_DBL loggain, maxGainReduction; + + FDK_ASSERT(limiter != NULL); + + loggain = fLog2(limiter->minGain, 1, &e_ans); + + maxGainReduction = fMult(loggain, FL2FXCONST_DBL(-6.0206f / (1 << 3))); + + return fixp_roundToInt(maxGainReduction, (e_ans + 3)); +} + /* set number of channels */ -TDLIMITER_ERROR setLimiterNChannels(TDLimiterPtr limiter, unsigned int nChannels) -{ - if ( limiter == NULL ) return TDLIMIT_INVALID_HANDLE; +TDLIMITER_ERROR pcmLimiter_SetNChannels(TDLimiterPtr limiter, + unsigned int nChannels) { + if (limiter == NULL) return TDLIMIT_INVALID_HANDLE; if (nChannels > limiter->maxChannels) return TDLIMIT_INVALID_PARAMETER; limiter->channels = nChannels; - //resetLimiter(limiter); + // pcmLimiter_Reset(limiter); return TDLIMIT_OK; } /* set sampling rate */ -TDLIMITER_ERROR setLimiterSampleRate(TDLimiterPtr limiter, unsigned int sampleRate) -{ +TDLIMITER_ERROR pcmLimiter_SetSampleRate(TDLimiterPtr limiter, + UINT sampleRate) { unsigned int attack, release; FIXP_DBL attackConst, releaseConst, exponent; INT e_ans; - if ( limiter == NULL ) return TDLIMIT_INVALID_HANDLE; + if (limiter == NULL) return TDLIMIT_INVALID_HANDLE; if (sampleRate > limiter->maxSampleRate) return TDLIMIT_INVALID_PARAMETER; @@ -418,7 +466,7 @@ TDLIMITER_ERROR setLimiterSampleRate(TDLimiterPtr limiter, unsigned int sampleRa release = (unsigned int)(limiter->releaseMs * sampleRate / 1000); /* attackConst = pow(0.1, 1.0 / (attack + 1)) */ - exponent = invFixp(attack+1); + exponent = invFixp(attack + 1); attackConst = fPow(FL2FXCONST_DBL(0.1f), 0, exponent, 0, &e_ans); attackConst = scaleValue(attackConst, e_ans); @@ -427,25 +475,25 @@ TDLIMITER_ERROR setLimiterSampleRate(TDLimiterPtr limiter, unsigned int sampleRa releaseConst = fPow(FL2FXCONST_DBL(0.1f), 0, exponent, 0, &e_ans); releaseConst = scaleValue(releaseConst, e_ans); - limiter->attack = attack; - limiter->attackConst = attackConst; - limiter->releaseConst = releaseConst; - limiter->sampleRate = sampleRate; + limiter->attack = attack; + limiter->attackConst = attackConst; + limiter->releaseConst = releaseConst; + limiter->sampleRate = sampleRate; /* reset */ - //resetLimiter(limiter); + // pcmLimiter_Reset(limiter); return TDLIMIT_OK; } /* set attack time */ -TDLIMITER_ERROR setLimiterAttack(TDLimiterPtr limiter, unsigned int attackMs) -{ +TDLIMITER_ERROR pcmLimiter_SetAttack(TDLimiterPtr limiter, + unsigned int attackMs) { unsigned int attack; FIXP_DBL attackConst, exponent; INT e_ans; - if ( limiter == NULL ) return TDLIMIT_INVALID_HANDLE; + if (limiter == NULL) return TDLIMIT_INVALID_HANDLE; if (attackMs > limiter->maxAttackMs) return TDLIMIT_INVALID_PARAMETER; @@ -453,25 +501,25 @@ TDLIMITER_ERROR setLimiterAttack(TDLimiterPtr limiter, unsigned int attackMs) attack = (unsigned int)(attackMs * limiter->sampleRate / 1000); /* attackConst = pow(0.1, 1.0 / (attack + 1)) */ - exponent = invFixp(attack+1); + exponent = invFixp(attack + 1); attackConst = fPow(FL2FXCONST_DBL(0.1f), 0, exponent, 0, &e_ans); attackConst = scaleValue(attackConst, e_ans); - limiter->attack = attack; - limiter->attackConst = attackConst; - limiter->attackMs = attackMs; + limiter->attack = attack; + limiter->attackConst = attackConst; + limiter->attackMs = attackMs; return TDLIMIT_OK; } /* set release time */ -TDLIMITER_ERROR setLimiterRelease(TDLimiterPtr limiter, unsigned int releaseMs) -{ +TDLIMITER_ERROR pcmLimiter_SetRelease(TDLimiterPtr limiter, + unsigned int releaseMs) { unsigned int release; FIXP_DBL releaseConst, exponent; INT e_ans; - if ( limiter == NULL ) return TDLIMIT_INVALID_HANDLE; + if (limiter == NULL) return TDLIMIT_INVALID_HANDLE; /* calculate release time in samples */ release = (unsigned int)(releaseMs * limiter->sampleRate / 1000); @@ -481,18 +529,42 @@ TDLIMITER_ERROR setLimiterRelease(TDLimiterPtr limiter, unsigned int releaseMs) releaseConst = fPow(FL2FXCONST_DBL(0.1f), 0, exponent, 0, &e_ans); releaseConst = scaleValue(releaseConst, e_ans); - limiter->releaseConst = releaseConst; - limiter->releaseMs = releaseMs; + limiter->releaseConst = releaseConst; + limiter->releaseMs = releaseMs; return TDLIMIT_OK; } -/* set limiter threshold */ -TDLIMITER_ERROR setLimiterThreshold(TDLimiterPtr limiter, INT_PCM threshold) -{ - if ( limiter == NULL ) return TDLIMIT_INVALID_HANDLE; +/* Get library info for this module. */ +TDLIMITER_ERROR pcmLimiter_GetLibInfo(LIB_INFO* info) { + int i; + + if (info == NULL) { + return TDLIMIT_INVALID_PARAMETER; + } + + /* Search for next free tab */ + for (i = 0; i < FDK_MODULE_LAST; i++) { + if (info[i].module_id == FDK_NONE) break; + } + if (i == FDK_MODULE_LAST) { + return TDLIMIT_UNKNOWN; + } + + /* Add the library info */ + info[i].module_id = FDK_TDLIMIT; + info[i].version = + LIB_VERSION(PCMUTIL_LIB_VL0, PCMUTIL_LIB_VL1, PCMUTIL_LIB_VL2); + LIB_VERSION_STRING(info + i); + info[i].build_date = PCMUTIL_LIB_BUILD_DATE; + info[i].build_time = PCMUTIL_LIB_BUILD_TIME; + info[i].title = TDLIMIT_LIB_TITLE; + + /* Set flags */ + info[i].flags = CAPF_LIMITER; - limiter->threshold = (FIXP_PCM)threshold; + /* Add lib info for FDK tools (if not yet done). */ + FDK_toolsGetLibInfo(info); return TDLIMIT_OK; } diff --git a/libPCMutils/src/pcm_utils.cpp b/libPCMutils/src/pcm_utils.cpp new file mode 100644 index 0000000..5dd18d9 --- /dev/null +++ b/libPCMutils/src/pcm_utils.cpp @@ -0,0 +1,195 @@ +/* ----------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten +Forschung e.V. All rights reserved. + + 1. INTRODUCTION +The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software +that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding +scheme for digital audio. This FDK AAC Codec software is intended to be used on +a wide variety of Android devices. + +AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient +general perceptual audio codecs. AAC-ELD is considered the best-performing +full-bandwidth communications codec by independent studies and is widely +deployed. AAC has been standardized by ISO and IEC as part of the MPEG +specifications. + +Patent licenses for necessary patent claims for the FDK AAC Codec (including +those of Fraunhofer) may be obtained through Via Licensing +(www.vialicensing.com) or through the respective patent owners individually for +the purpose of encoding or decoding bit streams in products that are compliant +with the ISO/IEC MPEG audio standards. Please note that most manufacturers of +Android devices already license these patent claims through Via Licensing or +directly from the patent owners, and therefore FDK AAC Codec software may +already be covered under those patent licenses when it is used for those +licensed purposes only. + +Commercially-licensed AAC software libraries, including floating-point versions +with enhanced sound quality, are also available from Fraunhofer. Users are +encouraged to check the Fraunhofer website for additional applications +information and documentation. + +2. COPYRIGHT LICENSE + +Redistribution and use in source and binary forms, with or without modification, +are permitted without payment of copyright license fees provided that you +satisfy the following conditions: + +You must retain the complete text of this software license in redistributions of +the FDK AAC Codec or your modifications thereto in source code form. + +You must retain the complete text of this software license in the documentation +and/or other materials provided with redistributions of the FDK AAC Codec or +your modifications thereto in binary form. You must make available free of +charge copies of the complete source code of the FDK AAC Codec and your +modifications thereto to recipients of copies in binary form. + +The name of Fraunhofer may not be used to endorse or promote products derived +from this library without prior written permission. + +You may not charge copyright license fees for anyone to use, copy or distribute +the FDK AAC Codec software or your modifications thereto. + +Your modified versions of the FDK AAC Codec must carry prominent notices stating +that you changed the software and the date of any change. For modified versions +of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" +must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK +AAC Codec Library for Android." + +3. NO PATENT LICENSE + +NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without +limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. +Fraunhofer provides no warranty of patent non-infringement with respect to this +software. + +You may use this FDK AAC Codec software or modifications thereto only for +purposes that are authorized by appropriate patent licenses. + +4. DISCLAIMER + +This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright +holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, +including but not limited to the implied warranties of merchantability and +fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR +CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, +or consequential damages, including but not limited to procurement of substitute +goods or services; loss of use, data, or profits, or business interruption, +however caused and on any theory of liability, whether in contract, strict +liability, or tort (including negligence), arising in any way out of the use of +this software, even if advised of the possibility of such damage. + +5. CONTACT INFORMATION + +Fraunhofer Institute for Integrated Circuits IIS +Attention: Audio and Multimedia Departments - FDK AAC LL +Am Wolfsmantel 33 +91058 Erlangen, Germany + +www.iis.fraunhofer.de/amm +amm-info@iis.fraunhofer.de +----------------------------------------------------------------------------- */ + +/**************************** PCM utility library ****************************** + + Author(s): Arthur Tritthart, Alfonso Pino Garcia + + Description: Functions that perform (de)interleaving combined with format +change + +*******************************************************************************/ + +#include "pcm_utils.h" + +/* library version */ +#include "version.h" + +void FDK_interleave(const FIXP_DBL *RESTRICT pIn, LONG *RESTRICT pOut, + const UINT channels, const UINT frameSize, + const UINT length) { + for (UINT sample = 0; sample < length; sample++) { + const FIXP_DBL *In = &pIn[sample]; + for (UINT ch = 0; ch < channels; ch++) { + *pOut++ = (LONG)In[0]; + In += frameSize; + } + } +} + +void FDK_interleave(const FIXP_DBL *RESTRICT pIn, SHORT *RESTRICT pOut, + const UINT channels, const UINT frameSize, + const UINT length) { + for (UINT sample = 0; sample < length; sample++) { + const FIXP_DBL *In = &pIn[sample]; + for (UINT ch = 0; ch < channels; ch++) { + *pOut++ = (SHORT)FX_DBL2FX_SGL(In[0]); + In += frameSize; + } + } +} + +void FDK_interleave(const FIXP_SGL *RESTRICT pIn, SHORT *RESTRICT pOut, + const UINT channels, const UINT frameSize, + const UINT length) { + for (UINT sample = 0; sample < length; sample++) { + const FIXP_SGL *In = &pIn[sample]; + for (UINT ch = 0; ch < channels; ch++) { + *pOut++ = (SHORT)In[0]; + In += frameSize; + } + } +} + +void FDK_deinterleave(const LONG *RESTRICT pIn, SHORT *RESTRICT _pOut, + const UINT channels, const UINT frameSize, + const UINT length) { + for (UINT ch = 0; ch < channels; ch++) { + SHORT *pOut = _pOut + length * ch; + const LONG *In = &pIn[ch]; + for (UINT sample = 0; sample < frameSize; sample++) { + *pOut++ = (SHORT)(In[0] >> 16); + In += channels; + } + } +} + +void FDK_deinterleave(const LONG *RESTRICT pIn, LONG *RESTRICT _pOut, + const UINT channels, const UINT frameSize, + const UINT length) { + for (UINT ch = 0; ch < channels; ch++) { + LONG *pOut = _pOut + length * ch; + const LONG *In = &pIn[ch]; + for (UINT sample = 0; sample < frameSize; sample++) { + *pOut++ = In[0]; + In += channels; + } + } +} + +void FDK_deinterleave(const SHORT *RESTRICT pIn, SHORT *RESTRICT _pOut, + const UINT channels, const UINT frameSize, + const UINT length) { + for (UINT ch = 0; ch < channels; ch++) { + SHORT *pOut = _pOut + length * ch; + const SHORT *In = &pIn[ch]; + for (UINT sample = 0; sample < frameSize; sample++) { + *pOut++ = In[0]; + In += channels; + } + } +} + +void FDK_deinterleave(const SHORT *RESTRICT pIn, LONG *RESTRICT _pOut, + const UINT channels, const UINT frameSize, + const UINT length) { + for (UINT ch = 0; ch < channels; ch++) { + LONG *pOut = _pOut + length * ch; + const SHORT *In = &pIn[ch]; + for (UINT sample = 0; sample < frameSize; sample++) { + *pOut++ = (LONG)In[0] << 16; + In += channels; + } + } +} diff --git a/libPCMutils/src/pcmdmx_lib.cpp b/libPCMutils/src/pcmdmx_lib.cpp new file mode 100644 index 0000000..b09a848 --- /dev/null +++ b/libPCMutils/src/pcmdmx_lib.cpp @@ -0,0 +1,2659 @@ +/* ----------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten +Forschung e.V. All rights reserved. + + 1. INTRODUCTION +The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software +that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding +scheme for digital audio. This FDK AAC Codec software is intended to be used on +a wide variety of Android devices. + +AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient +general perceptual audio codecs. AAC-ELD is considered the best-performing +full-bandwidth communications codec by independent studies and is widely +deployed. AAC has been standardized by ISO and IEC as part of the MPEG +specifications. + +Patent licenses for necessary patent claims for the FDK AAC Codec (including +those of Fraunhofer) may be obtained through Via Licensing +(www.vialicensing.com) or through the respective patent owners individually for +the purpose of encoding or decoding bit streams in products that are compliant +with the ISO/IEC MPEG audio standards. Please note that most manufacturers of +Android devices already license these patent claims through Via Licensing or +directly from the patent owners, and therefore FDK AAC Codec software may +already be covered under those patent licenses when it is used for those +licensed purposes only. + +Commercially-licensed AAC software libraries, including floating-point versions +with enhanced sound quality, are also available from Fraunhofer. Users are +encouraged to check the Fraunhofer website for additional applications +information and documentation. + +2. COPYRIGHT LICENSE + +Redistribution and use in source and binary forms, with or without modification, +are permitted without payment of copyright license fees provided that you +satisfy the following conditions: + +You must retain the complete text of this software license in redistributions of +the FDK AAC Codec or your modifications thereto in source code form. + +You must retain the complete text of this software license in the documentation +and/or other materials provided with redistributions of the FDK AAC Codec or +your modifications thereto in binary form. You must make available free of +charge copies of the complete source code of the FDK AAC Codec and your +modifications thereto to recipients of copies in binary form. + +The name of Fraunhofer may not be used to endorse or promote products derived +from this library without prior written permission. + +You may not charge copyright license fees for anyone to use, copy or distribute +the FDK AAC Codec software or your modifications thereto. + +Your modified versions of the FDK AAC Codec must carry prominent notices stating +that you changed the software and the date of any change. For modified versions +of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" +must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK +AAC Codec Library for Android." + +3. NO PATENT LICENSE + +NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without +limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. +Fraunhofer provides no warranty of patent non-infringement with respect to this +software. + +You may use this FDK AAC Codec software or modifications thereto only for +purposes that are authorized by appropriate patent licenses. + +4. DISCLAIMER + +This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright +holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, +including but not limited to the implied warranties of merchantability and +fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR +CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, +or consequential damages, including but not limited to procurement of substitute +goods or services; loss of use, data, or profits, or business interruption, +however caused and on any theory of liability, whether in contract, strict +liability, or tort (including negligence), arising in any way out of the use of +this software, even if advised of the possibility of such damage. + +5. CONTACT INFORMATION + +Fraunhofer Institute for Integrated Circuits IIS +Attention: Audio and Multimedia Departments - FDK AAC LL +Am Wolfsmantel 33 +91058 Erlangen, Germany + +www.iis.fraunhofer.de/amm +amm-info@iis.fraunhofer.de +----------------------------------------------------------------------------- */ + +/**************************** PCM utility library ****************************** + + Author(s): Christian Griebel + + Description: Defines functions that perform downmixing or a simple channel + expansion in the PCM time domain. + +*******************************************************************************/ + +#include "pcmdmx_lib.h" + +#include "genericStds.h" +#include "fixpoint_math.h" +#include "FDK_core.h" + +/* library version */ +#include "version.h" +/* library title */ +#define PCMDMX_LIB_TITLE "PCM Downmix Lib" + +#define FALSE 0 +#define TRUE 1 +#define IN 0 +#define OUT 1 + +/* Type definitions: */ +#define FIXP_DMX FIXP_SGL +#define FX_DMX2FX_DBL(x) FX_SGL2FX_DBL((FIXP_SGL)(x)) +#define FX_DBL2FX_DMX(x) FX_DBL2FX_SGL(x) +#define FL2FXCONST_DMX(x) FL2FXCONST_SGL(x) +#define MAXVAL_DMX MAXVAL_SGL +#define FX_DMX2SHRT(x) ((SHORT)(x)) +#define FX_DMX2FL(x) FX_DBL2FL(FX_DMX2FX_DBL(x)) + +/* Fixed and unique channel group indices. + * The last group index has to be smaller than ( 4 ). */ +#define CH_GROUP_FRONT (0) +#define CH_GROUP_SIDE (1) +#define CH_GROUP_REAR (2) +#define CH_GROUP_LFE (3) + +/* Fixed and unique channel plain indices. */ +#define CH_PLAIN_NORMAL (0) +#define CH_PLAIN_TOP (1) +#define CH_PLAIN_BOTTOM (2) + +/* The ordering of the following fixed channel labels has to be in MPEG-4 style. + * From the center to the back with left and right channel interleaved (starting + * with left). The last channel label index has to be smaller than ( 8 ). */ +#define CENTER_FRONT_CHANNEL (0) /* C */ +#define LEFT_FRONT_CHANNEL (1) /* L */ +#define RIGHT_FRONT_CHANNEL (2) /* R */ +#define LEFT_REAR_CHANNEL \ + (3) /* Lr (aka left back channel) or center back channel */ +#define RIGHT_REAR_CHANNEL (4) /* Rr (aka right back channel) */ +#define LOW_FREQUENCY_CHANNEL (5) /* Lf */ +#define LEFT_MULTIPRPS_CHANNEL (6) /* Left multipurpose channel */ +#define RIGHT_MULTIPRPS_CHANNEL (7) /* Right multipurpose channel */ + +/* 22.2 channel specific fixed channel lables: */ +#define LEFT_SIDE_CHANNEL (8) /* Lss */ +#define RIGHT_SIDE_CHANNEL (9) /* Rss */ +#define CENTER_REAR_CHANNEL (10) /* Cs */ +#define CENTER_FRONT_CHANNEL_TOP (11) /* Cv */ +#define LEFT_FRONT_CHANNEL_TOP (12) /* Lv */ +#define RIGHT_FRONT_CHANNEL_TOP (13) /* Rv */ +#define LEFT_SIDE_CHANNEL_TOP (14) /* Lvss */ +#define RIGHT_SIDE_CHANNEL_TOP (15) /* Rvss */ +#define CENTER_SIDE_CHANNEL_TOP (16) /* Ts */ +#define LEFT_REAR_CHANNEL_TOP (17) /* Lvr */ +#define RIGHT_REAR_CHANNEL_TOP (18) /* Rvr */ +#define CENTER_REAR_CHANNEL_TOP (19) /* Cvr */ +#define CENTER_FRONT_CHANNEL_BOTTOM (20) /* Cb */ +#define LEFT_FRONT_CHANNEL_BOTTOM (21) /* Lb */ +#define RIGHT_FRONT_CHANNEL_BOTTOM (22) /* Rb */ +#define LOW_FREQUENCY_CHANNEL_2 (23) /* LFE2 */ + +/* More constants */ +#define ONE_CHANNEL (1) +#define TWO_CHANNEL (2) +#define SIX_CHANNEL (6) +#define EIGHT_CHANNEL (8) +#define TWENTY_FOUR_CHANNEL (24) + +#define PCMDMX_THRESHOLD_MAP_HEAT_1 (0) /* Store only exact matches */ +#define PCMDMX_THRESHOLD_MAP_HEAT_2 (20) +#define PCMDMX_THRESHOLD_MAP_HEAT_3 \ + (256) /* Do not assign normal channels to LFE */ + +#define SP_Z_NRM (0) +#define SP_Z_TOP (2) +#define SP_Z_BOT (-2) +#define SP_Z_LFE (-18) +#define SP_Z_MUL (8) /* Should be smaller than SP_Z_LFE */ + +typedef struct { + SCHAR x; /* horizontal position: center (0), left (-), right (+) */ + SCHAR y; /* deepth position: front, side, back, position */ + SCHAR z; /* heigth positions: normal, top, bottom, lfe */ +} PCM_DMX_SPEAKER_POSITION; + +/* CAUTION: The maximum x-value should be less or equal to + * PCMDMX_SPKR_POS_X_MAX_WIDTH. */ +static const PCM_DMX_SPEAKER_POSITION spkrSlotPos[] = { + /* x, y, z */ + {0, 0, SP_Z_NRM}, /* 0 CENTER_FRONT_CHANNEL */ + {-2, 0, SP_Z_NRM}, /* 1 LEFT_FRONT_CHANNEL */ + {2, 0, SP_Z_NRM}, /* 2 RIGHT_FRONT_CHANNEL */ + {-3, 4, SP_Z_NRM}, /* 3 LEFT_REAR_CHANNEL */ + {3, 4, SP_Z_NRM}, /* 4 RIGHT_REAR_CHANNEL */ + {0, 0, SP_Z_LFE}, /* 5 LOW_FREQUENCY_CHANNEL */ + {-2, 2, SP_Z_MUL}, /* 6 LEFT_MULTIPRPS_CHANNEL */ + {2, 2, SP_Z_MUL} /* 7 RIGHT_MULTIPRPS_CHANNEL */ +}; + +/* List of packed channel modes */ +typedef enum { /* CH_MODE_<numFrontCh>_<numSideCh>_<numBackCh>_<numLfCh> */ + CH_MODE_UNDEFINED = 0x0000, + /* 1 channel */ + CH_MODE_1_0_0_0 = 0x0001, /* chCfg 1 */ + /* 2 channels */ + CH_MODE_2_0_0_0 = 0x0002 /* chCfg 2 */ + /* 3 channels */ + , + CH_MODE_3_0_0_0 = 0x0003, /* chCfg 3 */ + CH_MODE_2_0_1_0 = 0x0102, + CH_MODE_2_0_0_1 = 0x1002, + /* 4 channels */ + CH_MODE_3_0_1_0 = 0x0103, /* chCfg 4 */ + CH_MODE_2_0_2_0 = 0x0202, + CH_MODE_2_0_1_1 = 0x1102, + CH_MODE_4_0_0_0 = 0x0004, + /* 5 channels */ + CH_MODE_3_0_2_0 = 0x0203, /* chCfg 5 */ + CH_MODE_2_0_2_1 = 0x1202, + CH_MODE_3_0_1_1 = 0x1103, + CH_MODE_3_2_0_0 = 0x0023, + CH_MODE_5_0_0_0 = 0x0005, + /* 6 channels */ + CH_MODE_3_0_2_1 = 0x1203, /* chCfg 6 */ + CH_MODE_3_2_0_1 = 0x1023, + CH_MODE_3_2_1_0 = 0x0123, + CH_MODE_5_0_1_0 = 0x0105, + CH_MODE_6_0_0_0 = 0x0006, + /* 7 channels */ + CH_MODE_2_2_2_1 = 0x1222, + CH_MODE_3_0_3_1 = 0x1303, /* chCfg 11 */ + CH_MODE_3_2_1_1 = 0x1123, + CH_MODE_3_2_2_0 = 0x0223, + CH_MODE_3_0_2_2 = 0x2203, + CH_MODE_5_0_2_0 = 0x0205, + CH_MODE_5_0_1_1 = 0x1105, + CH_MODE_7_0_0_0 = 0x0007, + /* 8 channels */ + CH_MODE_3_2_2_1 = 0x1223, + CH_MODE_3_0_4_1 = 0x1403, /* chCfg 12 */ + CH_MODE_5_0_2_1 = 0x1205, /* chCfg 7 + 14 */ + CH_MODE_5_2_1_0 = 0x0125, + CH_MODE_3_2_1_2 = 0x2123, + CH_MODE_2_2_2_2 = 0x2222, + CH_MODE_3_0_3_2 = 0x2303, + CH_MODE_8_0_0_0 = 0x0008 + +} PCM_DMX_CHANNEL_MODE; + +/* These are the channel configurations linked to + the number of output channels give by the user: */ +static const PCM_DMX_CHANNEL_MODE outChModeTable[(8) + 1] = { + CH_MODE_UNDEFINED, + CH_MODE_1_0_0_0, /* 1 channel */ + CH_MODE_2_0_0_0 /* 2 channels */ + , + CH_MODE_3_0_0_0, /* 3 channels */ + CH_MODE_3_0_1_0, /* 4 channels */ + CH_MODE_3_0_2_0, /* 5 channels */ + CH_MODE_3_0_2_1 /* 6 channels */ + , + CH_MODE_3_0_3_1, /* 7 channels */ + CH_MODE_3_0_4_1 /* 8 channels */ +}; + +static const FIXP_DMX abMixLvlValueTab[8] = { + FL2FXCONST_DMX(0.500f), /* scaled by 1 */ + FL2FXCONST_DMX(0.841f), FL2FXCONST_DMX(0.707f), FL2FXCONST_DMX(0.596f), + FL2FXCONST_DMX(0.500f), FL2FXCONST_DMX(0.422f), FL2FXCONST_DMX(0.355f), + FL2FXCONST_DMX(0.0f)}; + +static const FIXP_DMX lfeMixLvlValueTab[16] = { + /* value, scale */ + FL2FXCONST_DMX(0.7905f), /* 2 */ + FL2FXCONST_DMX(0.5000f), /* 2 */ + FL2FXCONST_DMX(0.8395f), /* 1 */ + FL2FXCONST_DMX(0.7065f), /* 1 */ + FL2FXCONST_DMX(0.5945f), /* 1 */ + FL2FXCONST_DMX(0.500f), /* 1 */ + FL2FXCONST_DMX(0.841f), /* 0 */ + FL2FXCONST_DMX(0.707f), /* 0 */ + FL2FXCONST_DMX(0.596f), /* 0 */ + FL2FXCONST_DMX(0.500f), /* 0 */ + FL2FXCONST_DMX(0.316f), /* 0 */ + FL2FXCONST_DMX(0.178f), /* 0 */ + FL2FXCONST_DMX(0.100f), /* 0 */ + FL2FXCONST_DMX(0.032f), /* 0 */ + FL2FXCONST_DMX(0.010f), /* 0 */ + FL2FXCONST_DMX(0.000f) /* 0 */ +}; + +/* MPEG matrix mixdown: + Set 1: L' = (1 + 2^-0.5 + A )^-1 * [L + C * 2^-0.5 + A * Ls]; + R' = (1 + 2^-0.5 + A )^-1 * [R + C * 2^-0.5 + A * Rs]; + + Set 2: L' = (1 + 2^-0.5 + 2A )^-1 * [L + C * 2^-0.5 - A * (Ls + Rs)]; + R' = (1 + 2^-0.5 + 2A )^-1 * [R + C * 2^-0.5 + A * (Ls + Rs)]; + + M = (3 + 2A)^-1 * [L + C + R + A*(Ls + Rs)]; +*/ +static const FIXP_DMX mpegMixDownIdx2Coef[4] = { + FL2FXCONST_DMX(0.70710678f), FL2FXCONST_DMX(0.5f), + FL2FXCONST_DMX(0.35355339f), FL2FXCONST_DMX(0.0f)}; + +static const FIXP_DMX mpegMixDownIdx2PreFact[3][4] = { + {/* Set 1: */ + FL2FXCONST_DMX(0.4142135623730950f), FL2FXCONST_DMX(0.4530818393219728f), + FL2FXCONST_DMX(0.4852813742385703f), FL2FXCONST_DMX(0.5857864376269050f)}, + {/* Set 2: */ + FL2FXCONST_DMX(0.3203772410170407f), FL2FXCONST_DMX(0.3693980625181293f), + FL2FXCONST_DMX(0.4142135623730950f), FL2FXCONST_DMX(0.5857864376269050f)}, + {/* Mono DMX set: */ + FL2FXCONST_DMX(0.2265409196609864f), FL2FXCONST_DMX(0.25f), + FL2FXCONST_DMX(0.2697521433898179f), FL2FXCONST_DMX(0.3333333333333333f)}}; + +#define TYPE_NONE (0x00) +#define TYPE_PCE_DATA (0x01) +#define TYPE_DSE_CLEV_DATA (0x02) +#define TYPE_DSE_SLEV_DATA (0x04) +#define TYPE_DSE_DMIX_AB_DATA (0x08) +#define TYPE_DSE_DMIX_LFE_DATA (0x10) +#define TYPE_DSE_DMX_GAIN_DATA (0x20) +#define TYPE_DSE_DMX_CGL_DATA (0x40) +#define TYPE_DSE_DATA (0x7E) + +typedef struct { + UINT typeFlags; + /* From DSE */ + UCHAR cLevIdx; + UCHAR sLevIdx; + UCHAR dmixIdxA; + UCHAR dmixIdxB; + UCHAR dmixIdxLfe; + UCHAR dmxGainIdx2; + UCHAR dmxGainIdx5; + /* From PCE */ + UCHAR matrixMixdownIdx; + /* Attributes: */ + SCHAR pseudoSurround; /*!< If set to 1 the signal is pseudo surround + compatible. The value 0 tells that it is not. If the + value is -1 the information is not available. */ + UINT expiryCount; /*!< Counter to monitor the life time of a meta data set. */ + +} DMX_BS_META_DATA; + +/* Default metadata */ +static const DMX_BS_META_DATA dfltMetaData = {0, 2, 2, 2, 2, 15, + 0, 0, 0, -1, 0}; + +/* Dynamic (user) params: + See the definition of PCMDMX_PARAM for details on the specific fields. */ +typedef struct { + DMX_PROFILE_TYPE dmxProfile; /*!< Linked to DMX_PRFL_STANDARD */ + UINT expiryFrame; /*!< Linked to DMX_BS_DATA_EXPIRY_FRAME */ + DUAL_CHANNEL_MODE dualChannelMode; /*!< Linked to DMX_DUAL_CHANNEL_MODE */ + PSEUDO_SURROUND_MODE + pseudoSurrMode; /*!< Linked to DMX_PSEUDO_SURROUND_MODE */ + SHORT numOutChannelsMin; /*!< Linked to MIN_NUMBER_OF_OUTPUT_CHANNELS */ + SHORT numOutChannelsMax; /*!< Linked to MAX_NUMBER_OF_OUTPUT_CHANNELS */ + UCHAR frameDelay; /*!< Linked to DMX_BS_DATA_DELAY */ + +} PCM_DMX_USER_PARAMS; + +/* Modules main data structure: */ +struct PCM_DMX_INSTANCE { + /* Metadata */ + DMX_BS_META_DATA bsMetaData[(1) + 1]; + PCM_DMX_USER_PARAMS userParams; + + UCHAR applyProcessing; /*!< Flag to en-/disable modules processing. + The max channel limiting is done independently. */ +}; + +/* Memory allocation macro */ +C_ALLOC_MEM(PcmDmxInstance, struct PCM_DMX_INSTANCE, 1) + +static UINT getSpeakerDistance(PCM_DMX_SPEAKER_POSITION posA, + PCM_DMX_SPEAKER_POSITION posB) { + PCM_DMX_SPEAKER_POSITION diff; + + diff.x = posA.x - posB.x; + diff.y = posA.y - posB.y; + diff.z = posA.z - posB.z; + + return ((diff.x * diff.x) + (diff.y * diff.y) + (diff.z * diff.z)); +} + +static PCM_DMX_SPEAKER_POSITION getSpeakerPos(AUDIO_CHANNEL_TYPE chType, + UCHAR chIndex, UCHAR numChInGrp) { +#define PCMDMX_SPKR_POS_X_MAX_WIDTH (3) +#define PCMDMX_SPKR_POS_Y_SPREAD (2) +#define PCMDMX_SPKR_POS_Z_SPREAD (2) + + PCM_DMX_SPEAKER_POSITION spkrPos = {0, 0, 0}; + AUDIO_CHANNEL_TYPE chGrp = (AUDIO_CHANNEL_TYPE)(chType & 0x0F); + unsigned fHasCenter = numChInGrp & 0x1; + unsigned chGrpWidth = numChInGrp >> 1; + unsigned fIsCenter = 0; + unsigned fIsLfe = (chType == ACT_LFE) ? 1 : 0; + int offset = 0; + + FDK_ASSERT(chIndex < numChInGrp); + + if ((chGrp == ACT_FRONT) && fHasCenter) { + if (chIndex == 0) fIsCenter = 1; + chIndex = (UCHAR)fMax(0, chIndex - 1); + } else if (fHasCenter && (chIndex == numChInGrp - 1)) { + fIsCenter = 1; + } + /* now all even indices are left (-) */ + if (!fIsCenter) { + offset = chIndex >> 1; + if ((chGrp > ACT_FRONT) && (chType != ACT_SIDE) && !fIsLfe) { + /* the higher the index the lower the distance to the center position */ + offset = chGrpWidth - fHasCenter - offset; + } + if ((chIndex & 0x1) == 0) { /* even */ + offset = -(offset + 1); + } else { + offset += 1; + } + } + /* apply the offset */ + if (chType == ACT_SIDE) { + spkrPos.x = (offset < 0) ? -PCMDMX_SPKR_POS_X_MAX_WIDTH + : PCMDMX_SPKR_POS_X_MAX_WIDTH; + spkrPos.y = /* 1x */ PCMDMX_SPKR_POS_Y_SPREAD + (SCHAR)fAbs(offset) - 1; + spkrPos.z = 0; + } else { + unsigned spread = + ((chGrpWidth == 1) && (!fIsLfe)) ? PCMDMX_SPKR_POS_X_MAX_WIDTH - 1 : 1; + spkrPos.x = (SCHAR)offset * (SCHAR)spread; + if (fIsLfe) { + spkrPos.y = 0; + spkrPos.z = SP_Z_LFE; + } else { + spkrPos.y = (SCHAR)fMax((SCHAR)chGrp - 1, 0) * PCMDMX_SPKR_POS_Y_SPREAD; + spkrPos.z = (SCHAR)chType >> 4; + if (spkrPos.z == 2) { /* ACT_BOTTOM */ + spkrPos.z = -1; + } + spkrPos.z *= PCMDMX_SPKR_POS_Z_SPREAD; + } + } + return spkrPos; +} + +/** Return the channel mode of a given horizontal channel plain (normal, top, + *bottom) for a given channel configuration. NOTE: This function shall get + *obsolete once the channel mode has been changed to be nonambiguous. + * @param [in] Index of the requested channel plain. + * @param [in] The packed channel mode for the complete channel configuration + *(all plains). + * @param [in] The MPEG-4 channel configuration index which is necessary in + *cases where the (packed) channel mode is ambiguous. + * @returns Returns the packed channel mode of the requested channel plain. + **/ +static PCM_DMX_CHANNEL_MODE getChMode4Plain( + const int plainIndex, const PCM_DMX_CHANNEL_MODE totChMode, + const int chCfg) { + PCM_DMX_CHANNEL_MODE plainChMode = totChMode; + + switch (totChMode) { + case CH_MODE_5_0_2_1: + if (chCfg == 14) { + switch (plainIndex) { + case CH_PLAIN_BOTTOM: + plainChMode = (PCM_DMX_CHANNEL_MODE)0x0000; + break; + case CH_PLAIN_TOP: + plainChMode = CH_MODE_2_0_0_0; + break; + case CH_PLAIN_NORMAL: + default: + plainChMode = CH_MODE_3_0_2_1; + break; + } + } + break; + default: + break; + } + + return plainChMode; +} + +static inline UINT getIdxSum(UCHAR numCh) { + UINT result = 0; + int i; + for (i = 1; i < numCh; i += 1) { + result += i; + } + return result; +} + +/** Evaluate a given channel configuration and extract a packed channel mode. In + *addition the function generates a channel offset table for the mapping to the + *internal representation. This function is the inverse to the + *getChannelDescription() routine. + * @param [in] The total number of channels of the given configuration. + * @param [in] Array holding the corresponding channel types for each channel. + * @param [in] Array holding the corresponding channel type indices for each + *channel. + * @param [out] Array where the buffer offsets for each channel are stored into. + * @param [out] The generated packed channel mode that represents the given + *input configuration. + * @returns Returns an error code. + **/ +static PCMDMX_ERROR getChannelMode( + const UINT numChannels, /* in */ + const AUDIO_CHANNEL_TYPE channelType[], /* in */ + UCHAR channelIndices[], /* in */ + UCHAR offsetTable[(8)], /* out */ + PCM_DMX_CHANNEL_MODE *chMode /* out */ +) { + UINT idxSum[(3)][(4)]; + UCHAR numCh[(3)][(4)]; + UCHAR mapped[(8)]; + PCM_DMX_SPEAKER_POSITION spkrPos[(8)]; + PCMDMX_ERROR err = PCMDMX_OK; + unsigned ch, numMappedInChs = 0; + unsigned startSlot; + unsigned stopSlot = LOW_FREQUENCY_CHANNEL; + + FDK_ASSERT(channelType != NULL); + FDK_ASSERT(channelIndices != NULL); + FDK_ASSERT(offsetTable != NULL); + FDK_ASSERT(chMode != NULL); + + /* For details see ISO/IEC 13818-7:2005(E), 8.5.3 Channel configuration */ + FDKmemclear(idxSum, (3) * (4) * sizeof(UINT)); + FDKmemclear(numCh, (3) * (4) * sizeof(UCHAR)); + FDKmemclear(mapped, (8) * sizeof(UCHAR)); + FDKmemclear(spkrPos, (8) * sizeof(PCM_DMX_SPEAKER_POSITION)); + /* Init output */ + FDKmemset(offsetTable, 255, (8) * sizeof(UCHAR)); + *chMode = CH_MODE_UNDEFINED; + + /* Determine how many channels are assigned to each channels each group: */ + for (ch = 0; ch < numChannels; ch += 1) { + unsigned chGrp = fMax( + (channelType[ch] & 0x0F) - 1, + 0); /* Assign all undefined channels (ACT_NONE) to front channels. */ + numCh[channelType[ch] >> 4][chGrp] += 1; + idxSum[channelType[ch] >> 4][chGrp] += channelIndices[ch]; + } + if (numChannels > TWO_CHANNEL) { + int chGrp; + /* Sanity check on the indices */ + for (chGrp = 0; chGrp < (4); chGrp += 1) { + int plane; + for (plane = 0; plane < (3); plane += 1) { + if (idxSum[plane][chGrp] != getIdxSum(numCh[plane][chGrp])) { + unsigned idxCnt = 0; + for (ch = 0; ch < numChannels; ch += 1) { + if (channelType[ch] == + (AUDIO_CHANNEL_TYPE)((plane << 4) | ((chGrp + 1) & 0xF))) { + channelIndices[ch] = idxCnt++; + } + } + err = PCMDMX_INVALID_CH_CONFIG; + } + } + } + } + /* Mapping HEAT 1: + * Determine the speaker position of each input channel and map it to a + * internal slot if it matches exactly (with zero distance). */ + for (ch = 0; ch < numChannels; ch += 1) { + UINT mapDist = (unsigned)-1; + unsigned mapCh, mapPos = (unsigned)-1; + unsigned chGrp = fMax( + (channelType[ch] & 0x0F) - 1, + 0); /* Assign all undefined channels (ACT_NONE) to front channels. */ + + spkrPos[ch] = getSpeakerPos(channelType[ch], channelIndices[ch], + numCh[channelType[ch] >> 4][chGrp]); + + for (mapCh = 0; mapCh <= stopSlot; mapCh += 1) { + if (offsetTable[mapCh] == 255) { + UINT dist = getSpeakerDistance(spkrPos[ch], spkrSlotPos[mapCh]); + if (dist < mapDist) { + mapPos = mapCh; + mapDist = dist; + } + } + } + if (mapDist <= PCMDMX_THRESHOLD_MAP_HEAT_1) { + offsetTable[mapPos] = (UCHAR)ch; + mapped[ch] = 1; + numMappedInChs += 1; + } + } + + /* Mapping HEAT 2: + * Go through the unmapped input channels and assign them to the internal + * slots that matches best (least distance). But assign center channels to + * center slots only. */ + startSlot = + ((numCh[CH_PLAIN_NORMAL][CH_GROUP_FRONT] & 0x1) || (numChannels >= (8))) + ? 0 + : 1; + for (ch = 0; ch < (unsigned)numChannels; ch += 1) { + if (!mapped[ch]) { + UINT mapDist = (unsigned)-1; + unsigned mapCh, mapPos = (unsigned)-1; + + for (mapCh = startSlot; mapCh <= stopSlot; mapCh += 1) { + if (offsetTable[mapCh] == 255) { + UINT dist = getSpeakerDistance(spkrPos[ch], spkrSlotPos[mapCh]); + if (dist < mapDist) { + mapPos = mapCh; + mapDist = dist; + } + } + } + if ((mapPos <= stopSlot) && (mapDist < PCMDMX_THRESHOLD_MAP_HEAT_2) && + (((spkrPos[ch].x != 0) && (spkrSlotPos[mapPos].x != 0)) /* XOR */ + || ((spkrPos[ch].x == 0) && + (spkrSlotPos[mapPos].x == + 0)))) { /* Assign center channels to center slots only. */ + offsetTable[mapPos] = (UCHAR)ch; + mapped[ch] = 1; + numMappedInChs += 1; + } + } + } + + /* Mapping HEAT 3: + * Assign the rest by searching for the nearest input channel for each + * internal slot. */ + for (ch = startSlot; (ch < (8)) && (numMappedInChs < numChannels); ch += 1) { + if (offsetTable[ch] == 255) { + UINT mapDist = (unsigned)-1; + unsigned mapCh, mapPos = (unsigned)-1; + + for (mapCh = 0; mapCh < (unsigned)numChannels; mapCh += 1) { + if (!mapped[mapCh]) { + UINT dist = getSpeakerDistance(spkrPos[mapCh], spkrSlotPos[ch]); + if (dist < mapDist) { + mapPos = mapCh; + mapDist = dist; + } + } + } + if (mapDist < PCMDMX_THRESHOLD_MAP_HEAT_3) { + offsetTable[ch] = (UCHAR)mapPos; + mapped[mapPos] = 1; + numMappedInChs += 1; + if ((spkrPos[mapPos].x == 0) && (spkrSlotPos[ch].x != 0) && + (numChannels < + (8))) { /* Skip the paired slot if we assigned a center channel. */ + ch += 1; + } + } + } + } + + /* Finaly compose the channel mode */ + for (ch = 0; ch < (4); ch += 1) { + int plane, numChInGrp = 0; + for (plane = 0; plane < (3); plane += 1) { + numChInGrp += numCh[plane][ch]; + } + *chMode = (PCM_DMX_CHANNEL_MODE)(*chMode | (numChInGrp << (ch * 4))); + } + + return err; +} + +/** Generate a channel offset table and complete channel description for a given + *(packed) channel mode. This function is the inverse to the getChannelMode() + *routine but does not support weird channel configurations. + * @param [in] The packed channel mode of the configuration to be processed. + * @param [in] Array containing the channel mapping to be used (From MPEG PCE + *ordering to whatever is required). + * @param [out] Array where corresponding channel types for each channels are + *stored into. + * @param [out] Array where corresponding channel type indices for each output + *channel are stored into. + * @param [out] Array where the buffer offsets for each channel are stored into. + * @returns None. + **/ +static void getChannelDescription( + const PCM_DMX_CHANNEL_MODE chMode, /* in */ + const FDK_channelMapDescr *const mapDescr, /* in */ + AUDIO_CHANNEL_TYPE channelType[], /* out */ + UCHAR channelIndices[], /* out */ + UCHAR offsetTable[(8)] /* out */ +) { + int grpIdx, plainIdx, numPlains = 1, numTotalChannels = 0; + int chCfg, ch = 0; + + FDK_ASSERT(channelType != NULL); + FDK_ASSERT(channelIndices != NULL); + FDK_ASSERT(mapDescr != NULL); + FDK_ASSERT(offsetTable != NULL); + + /* Init output arrays */ + FDKmemclear(channelType, (8) * sizeof(AUDIO_CHANNEL_TYPE)); + FDKmemclear(channelIndices, (8) * sizeof(UCHAR)); + FDKmemset(offsetTable, 255, (8) * sizeof(UCHAR)); + + /* Summerize to get the total number of channels */ + for (grpIdx = 0; grpIdx < (4); grpIdx += 1) { + numTotalChannels += (chMode >> (grpIdx * 4)) & 0xF; + } + + /* Get the appropriate channel map */ + switch (chMode) { + case CH_MODE_1_0_0_0: + case CH_MODE_2_0_0_0: + case CH_MODE_3_0_0_0: + case CH_MODE_3_0_1_0: + case CH_MODE_3_0_2_0: + case CH_MODE_3_0_2_1: + chCfg = numTotalChannels; + break; + case CH_MODE_3_0_3_1: + chCfg = 11; + break; + case CH_MODE_3_0_4_1: + chCfg = 12; + break; + case CH_MODE_5_0_2_1: + chCfg = 7; + break; + default: + /* fallback */ + chCfg = 0; + break; + } + + /* Compose channel offset table */ + + for (plainIdx = 0; plainIdx < numPlains; plainIdx += 1) { + PCM_DMX_CHANNEL_MODE plainChMode; + UCHAR numChInGrp[(4)]; + + plainChMode = getChMode4Plain(plainIdx, chMode, chCfg); + + /* Extract the number of channels per group */ + numChInGrp[CH_GROUP_FRONT] = plainChMode & 0xF; + numChInGrp[CH_GROUP_SIDE] = (plainChMode >> 4) & 0xF; + numChInGrp[CH_GROUP_REAR] = (plainChMode >> 8) & 0xF; + numChInGrp[CH_GROUP_LFE] = (plainChMode >> 12) & 0xF; + + /* Non-symmetric channels */ + if ((numChInGrp[CH_GROUP_FRONT] & 0x1) && (plainIdx == CH_PLAIN_NORMAL)) { + /* Odd number of front channels -> we have a center channel. + In MPEG-4 the center has the index 0. */ + int mappedIdx = FDK_chMapDescr_getMapValue(mapDescr, (UCHAR)ch, chCfg); + offsetTable[CENTER_FRONT_CHANNEL] = (UCHAR)mappedIdx; + channelType[mappedIdx] = ACT_FRONT; + channelIndices[mappedIdx] = 0; + ch += 1; + } + + for (grpIdx = 0; grpIdx < (4); grpIdx += 1) { + AUDIO_CHANNEL_TYPE type = ACT_NONE; + int chMapPos = 0, maxChannels = 0; + int chIdx = 0; /* Index of channel within the specific group */ + + switch (grpIdx) { + case CH_GROUP_FRONT: + type = (AUDIO_CHANNEL_TYPE)((plainIdx << 4) | ACT_FRONT); + switch (plainIdx) { + default: + chMapPos = LEFT_FRONT_CHANNEL; + chIdx = numChInGrp[grpIdx] & 0x1; + break; + } + maxChannels = 3; + break; + case CH_GROUP_SIDE: + /* Always map side channels to the multipurpose group. */ + type = (AUDIO_CHANNEL_TYPE)((plainIdx << 4) | ACT_SIDE); + if (plainIdx == CH_PLAIN_TOP) { + chMapPos = LEFT_SIDE_CHANNEL_TOP; + maxChannels = 3; + } else { + chMapPos = LEFT_MULTIPRPS_CHANNEL; + maxChannels = 2; + } + break; + case CH_GROUP_REAR: + type = (AUDIO_CHANNEL_TYPE)((plainIdx << 4) | ACT_BACK); + if (plainIdx == CH_PLAIN_TOP) { + chMapPos = LEFT_REAR_CHANNEL_TOP; + maxChannels = 3; + } else { + chMapPos = LEFT_REAR_CHANNEL; + maxChannels = 2; + } + break; + case CH_GROUP_LFE: + if (plainIdx == CH_PLAIN_NORMAL) { + type = ACT_LFE; + chMapPos = LOW_FREQUENCY_CHANNEL; + maxChannels = 1; + } + break; + default: + break; + } + + /* Map all channels in this group */ + for (; chIdx < numChInGrp[grpIdx]; chIdx += 1) { + int mappedIdx = FDK_chMapDescr_getMapValue(mapDescr, (UCHAR)ch, chCfg); + if ((chIdx == maxChannels) || (offsetTable[chMapPos] < 255)) { + /* No space left in this channel group! */ + if (offsetTable[LEFT_MULTIPRPS_CHANNEL] == + 255) { /* Use the multipurpose group: */ + chMapPos = LEFT_MULTIPRPS_CHANNEL; + } else { + FDK_ASSERT(0); + } + } + offsetTable[chMapPos] = (UCHAR)mappedIdx; + channelType[mappedIdx] = type; + channelIndices[mappedIdx] = (UCHAR)chIdx; + chMapPos += 1; + ch += 1; + } + } + } +} + +/** Private helper function for downmix matrix manipulation that initializes + * one row in a given downmix matrix (corresponding to one output channel). + * @param [inout] Pointer to fixed-point parts of the downmix matrix. + * @param [inout] Pointer to scale factor matrix associated to the downmix + *factors. + * @param [in] Index of channel (row) to be initialized. + * @returns Nothing to return. + **/ +static void dmxInitChannel(FIXP_DMX mixFactors[(8)][(8)], + INT mixScales[(8)][(8)], const unsigned int outCh) { + unsigned int inCh; + for (inCh = 0; inCh < (8); inCh += 1) { + if (inCh == outCh) { + mixFactors[outCh][inCh] = FL2FXCONST_DMX(0.5f); + mixScales[outCh][inCh] = 1; + } else { + mixFactors[outCh][inCh] = FL2FXCONST_DMX(0.0f); + mixScales[outCh][inCh] = 0; + } + } +} + +/** Private helper function for downmix matrix manipulation that does a reset + * of one row in a given downmix matrix (corresponding to one output channel). + * @param [inout] Pointer to fixed-point parts of the downmix matrix. + * @param [inout] Pointer to scale factor matrix associated to the downmix + *factors. + * @param [in] Index of channel (row) to be cleared/reset. + * @returns Nothing to return. + **/ +static void dmxClearChannel(FIXP_DMX mixFactors[(8)][(8)], + INT mixScales[(8)][(8)], const unsigned int outCh) { + FDK_ASSERT((outCh >= 0) && (outCh < (8))); + FDKmemclear(&mixFactors[outCh], (8) * sizeof(FIXP_DMX)); + FDKmemclear(&mixScales[outCh], (8) * sizeof(INT)); +} + +/** Private helper function for downmix matrix manipulation that applies a + *source channel (row) scaled by a given mix factor to a destination channel + *(row) in a given downmix matrix. Existing mix factors of the destination + *channel (row) will get overwritten. + * @param [inout] Pointer to fixed-point parts of the downmix matrix. + * @param [inout] Pointer to scale factor matrix associated to the downmix + *factors. + * @param [in] Index of source channel (row). + * @param [in] Index of destination channel (row). + * @param [in] Fixed-point part of mix factor to be applied. + * @param [in] Scale factor of mix factor to be applied. + * @returns Nothing to return. + **/ +static void dmxSetChannel(FIXP_DMX mixFactors[(8)][(8)], + INT mixScales[(8)][(8)], const unsigned int dstCh, + const unsigned int srcCh, const FIXP_DMX factor, + const INT scale) { + int ch; + for (ch = 0; ch < (8); ch += 1) { + if (mixFactors[srcCh][ch] != (FIXP_DMX)0) { + mixFactors[dstCh][ch] = + FX_DBL2FX_DMX(fMult(mixFactors[srcCh][ch], factor)); + mixScales[dstCh][ch] = mixScales[srcCh][ch] + scale; + } + } +} + +/** Private helper function for downmix matrix manipulation that adds a source + *channel (row) scaled by a given mix factor to a destination channel (row) in a + *given downmix matrix. + * @param [inout] Pointer to fixed-point parts of the downmix matrix. + * @param [inout] Pointer to scale factor matrix associated to the downmix + *factors. + * @param [in] Index of source channel (row). + * @param [in] Index of destination channel (row). + * @param [in] Fixed-point part of mix factor to be applied. + * @param [in] Scale factor of mix factor to be applied. + * @returns Nothing to return. + **/ +static void dmxAddChannel(FIXP_DMX mixFactors[(8)][(8)], + INT mixScales[(8)][(8)], const unsigned int dstCh, + const unsigned int srcCh, const FIXP_DMX factor, + const INT scale) { + int ch; + for (ch = 0; ch < (8); ch += 1) { + FIXP_DBL addFact = fMult(mixFactors[srcCh][ch], factor); + if (addFact != (FIXP_DMX)0) { + INT newScale = mixScales[srcCh][ch] + scale; + if (mixFactors[dstCh][ch] != (FIXP_DMX)0) { + if (newScale > mixScales[dstCh][ch]) { + mixFactors[dstCh][ch] >>= newScale - mixScales[dstCh][ch]; + } else { + addFact >>= mixScales[dstCh][ch] - newScale; + newScale = mixScales[dstCh][ch]; + } + } + mixFactors[dstCh][ch] += FX_DBL2FX_DMX(addFact); + mixScales[dstCh][ch] = newScale; + } + } +} + +/** Private function that creates a downmix factor matrix depending on the input + and output + * configuration, the user parameters as well as the given metadata. This + function is the modules + * brain and hold all downmix algorithms. + * @param [in] Flag that indicates if inChMode holds a real (packed) channel + mode or has been converted to a MPEG-4 channel configuration index. + * @param [in] Dependent on the inModeIsCfg flag this field hands in a (packed) + channel mode or the corresponding MPEG-4 channel configuration index.of the + input configuration. + * @param [in] The (packed) channel mode of the output configuration. + * @param [in] Pointer to structure holding all current user parameter. + * @param [in] Pointer to field holding all current meta data. + * @param [out] Pointer to fixed-point parts of the downmix matrix. Normalized + to one scale factor. + * @param [out] The common scale factor of the downmix matrix. + * @returns An error code. + **/ +static PCMDMX_ERROR getMixFactors(const UCHAR inModeIsCfg, + PCM_DMX_CHANNEL_MODE inChMode, + const PCM_DMX_CHANNEL_MODE outChMode, + const PCM_DMX_USER_PARAMS *pParams, + const DMX_BS_META_DATA *pMetaData, + FIXP_DMX mixFactors[(8)][(8)], + INT *pOutScale) { + PCMDMX_ERROR err = PCMDMX_OK; + INT mixScales[(8)][(8)]; + INT maxScale = 0; + int numInChannel; + int numOutChannel; + int dmxMethod; + unsigned int outCh, inChCfg = 0; + unsigned int valid[(8)] = {0}; + + FDK_ASSERT(pMetaData != NULL); + FDK_ASSERT(mixFactors != NULL); + /* Check on a supported output configuration. + Add new one only after extensive testing! */ + if (!((outChMode == CH_MODE_1_0_0_0) || (outChMode == CH_MODE_2_0_0_0) || + (outChMode == CH_MODE_3_0_2_1) || (outChMode == CH_MODE_3_0_4_1) || + (outChMode == CH_MODE_5_0_2_1))) { + FDK_ASSERT(0); + } + + if (inModeIsCfg) { + /* Convert channel config to channel mode: */ + inChCfg = (unsigned int)inChMode; + switch (inChCfg) { + case 1: + case 2: + case 3: + case 4: + case 5: + case 6: + inChMode = outChModeTable[inChCfg]; + break; + case 11: + inChMode = CH_MODE_3_0_3_1; + break; + case 12: + inChMode = CH_MODE_3_0_4_1; + break; + case 7: + case 14: + inChMode = CH_MODE_5_0_2_1; + break; + default: + FDK_ASSERT(0); + } + } + + /* Extract the total number of input channels */ + numInChannel = (inChMode & 0xF) + ((inChMode >> 4) & 0xF) + + ((inChMode >> 8) & 0xF) + ((inChMode >> 12) & 0xF); + /* Extract the total number of output channels */ + numOutChannel = (outChMode & 0xF) + ((outChMode >> 4) & 0xF) + + ((outChMode >> 8) & 0xF) + ((outChMode >> 12) & 0xF); + + /* MPEG ammendment 4 aka ETSI metadata and fallback mode: */ + + /* Create identity DMX matrix: */ + for (outCh = 0; outCh < (8); outCh += 1) { + dmxInitChannel(mixFactors, mixScales, outCh); + } + if (((inChMode >> 12) & 0xF) == 0) { + /* Clear empty or wrongly mapped input channel */ + dmxClearChannel(mixFactors, mixScales, LOW_FREQUENCY_CHANNEL); + } + + /* FIRST STAGE: */ + if (numInChannel > SIX_CHANNEL) { /* Always use MPEG equations either with + meta data or with default values. */ + FIXP_DMX dMixFactA, dMixFactB; + INT dMixScaleA, dMixScaleB; + int isValidCfg = TRUE; + + /* Get factors from meta data */ + dMixFactA = abMixLvlValueTab[pMetaData->dmixIdxA]; + dMixScaleA = (pMetaData->dmixIdxA == 0) ? 1 : 0; + dMixFactB = abMixLvlValueTab[pMetaData->dmixIdxB]; + dMixScaleB = (pMetaData->dmixIdxB == 0) ? 1 : 0; + + /* Check if input is in the list of supported configurations */ + switch (inChMode) { + case CH_MODE_3_2_1_1: /* chCfg 11 but with side channels */ + case CH_MODE_3_2_1_0: + isValidCfg = FALSE; + err = PCMDMX_INVALID_MODE; + case CH_MODE_3_0_3_1: /* chCfg 11 */ + /* 6.1ch: C' = C; L' = L; R' = R; LFE' = LFE; + Ls' = Ls*dmix_a_idx + Cs*dmix_b_idx; + Rs' = Rs*dmix_a_idx + Cs*dmix_b_idx; */ + dmxClearChannel( + mixFactors, mixScales, + RIGHT_MULTIPRPS_CHANNEL); /* clear empty input channel */ + dmxSetChannel(mixFactors, mixScales, LEFT_REAR_CHANNEL, + LEFT_REAR_CHANNEL, dMixFactA, dMixScaleA); + dmxSetChannel(mixFactors, mixScales, LEFT_REAR_CHANNEL, + LEFT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB); + dmxSetChannel(mixFactors, mixScales, RIGHT_REAR_CHANNEL, + RIGHT_REAR_CHANNEL, dMixFactA, dMixScaleA); + dmxSetChannel(mixFactors, mixScales, RIGHT_REAR_CHANNEL, + LEFT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB); + break; + case CH_MODE_3_0_4_1: /* chCfg 12 */ + /* 7.1ch Surround Back: C' = C; L' = L; R' = R; LFE' = LFE; + Ls' = Ls*dmix_a_idx + Lsr*dmix_b_idx; + Rs' = Rs*dmix_a_idx + Rsr*dmix_b_idx; */ + dmxSetChannel(mixFactors, mixScales, LEFT_REAR_CHANNEL, + LEFT_REAR_CHANNEL, dMixFactA, dMixScaleA); + dmxSetChannel(mixFactors, mixScales, LEFT_REAR_CHANNEL, + LEFT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB); + dmxSetChannel(mixFactors, mixScales, RIGHT_REAR_CHANNEL, + RIGHT_REAR_CHANNEL, dMixFactA, dMixScaleA); + dmxSetChannel(mixFactors, mixScales, RIGHT_REAR_CHANNEL, + RIGHT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB); + break; + case CH_MODE_5_0_1_0: + case CH_MODE_5_0_1_1: + dmxClearChannel(mixFactors, mixScales, + RIGHT_REAR_CHANNEL); /* clear empty input channel */ + dmxSetChannel(mixFactors, mixScales, RIGHT_REAR_CHANNEL, + LEFT_REAR_CHANNEL, FL2FXCONST_DMX(0.5f), 1); + dmxSetChannel(mixFactors, mixScales, LEFT_REAR_CHANNEL, + LEFT_REAR_CHANNEL, FL2FXCONST_DMX(0.5f), 1); + case CH_MODE_5_2_1_0: + isValidCfg = FALSE; + err = PCMDMX_INVALID_MODE; + case CH_MODE_5_0_2_1: /* chCfg 7 || 14 */ + if (inChCfg == 14) { + /* 7.1ch Front Height: C' = C; Ls' = Ls; Rs' = Rs; LFE' = LFE; + L' = L*dmix_a_idx + Lv*dmix_b_idx; + R' = R*dmix_a_idx + Rv*dmix_b_idx; */ + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, dMixFactA, dMixScaleA); + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB); + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, dMixFactA, dMixScaleA); + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB); + } else { + /* 7.1ch Front: Ls' = Ls; Rs' = Rs; LFE' = LFE; + C' = C + (Lc+Rc)*dmix_a_idx; + L' = L + Lc*dmix_b_idx; + R' = R + Rc*dmix_b_idx; */ + dmxSetChannel(mixFactors, mixScales, CENTER_FRONT_CHANNEL, + LEFT_MULTIPRPS_CHANNEL, dMixFactA, dMixScaleA); + dmxSetChannel(mixFactors, mixScales, CENTER_FRONT_CHANNEL, + RIGHT_MULTIPRPS_CHANNEL, dMixFactA, dMixScaleA); + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB); + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, FL2FXCONST_DMX(0.5f), 1); + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB); + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, FL2FXCONST_DMX(0.5f), 1); + } + break; + default: + /* Nothing to do. Just use the identity matrix. */ + isValidCfg = FALSE; + err = PCMDMX_INVALID_MODE; + break; + } + + /* Add additional DMX gain */ + if ((isValidCfg == TRUE) && + (pMetaData->dmxGainIdx5 != 0)) { /* Apply DMX gain 5 */ + FIXP_DMX dmxGain; + INT dmxScale; + INT sign = (pMetaData->dmxGainIdx5 & 0x40) ? -1 : 1; + INT val = pMetaData->dmxGainIdx5 & 0x3F; + + /* 10^(dmx_gain_5/80) */ + dmxGain = FX_DBL2FX_DMX( + fLdPow(FL2FXCONST_DBL(0.830482023721841f), 2, /* log2(10) */ + (FIXP_DBL)(sign * val * (LONG)FL2FXCONST_DBL(0.0125f)), 0, + &dmxScale)); + /* Currently only positive scale factors supported! */ + if (dmxScale < 0) { + dmxGain >>= -dmxScale; + dmxScale = 0; + } + + dmxSetChannel(mixFactors, mixScales, CENTER_FRONT_CHANNEL, + CENTER_FRONT_CHANNEL, dmxGain, dmxScale); + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, dmxGain, dmxScale); + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, dmxGain, dmxScale); + dmxSetChannel(mixFactors, mixScales, LEFT_REAR_CHANNEL, LEFT_REAR_CHANNEL, + dmxGain, dmxScale); + dmxSetChannel(mixFactors, mixScales, RIGHT_REAR_CHANNEL, + RIGHT_REAR_CHANNEL, dmxGain, dmxScale); + dmxSetChannel(mixFactors, mixScales, LOW_FREQUENCY_CHANNEL, + LOW_FREQUENCY_CHANNEL, dmxGain, dmxScale); + } + + /* Mark the output channels */ + valid[CENTER_FRONT_CHANNEL] = 1; + valid[LEFT_FRONT_CHANNEL] = 1; + valid[RIGHT_FRONT_CHANNEL] = 1; + valid[LEFT_REAR_CHANNEL] = 1; + valid[RIGHT_REAR_CHANNEL] = 1; + valid[LOW_FREQUENCY_CHANNEL] = 1; + + /* Update channel mode for the next stage */ + inChMode = CH_MODE_3_0_2_1; + } + + /* For the X (> 6) to 6 channel downmix we had no choice. + To mix from 6 to 2 (or 1) channel(s) we have several possibilities (MPEG + DSE | MPEG PCE | ITU | ARIB | DLB). Use profile and the metadata + available flags to determine which equation to use: */ + +#define DMX_METHOD_MPEG_AMD4 1 +#define DMX_METHOD_MPEG_LEGACY 2 +#define DMX_METHOD_ARIB_JAPAN 4 +#define DMX_METHOD_ITU_RECOM 8 +#define DMX_METHOD_CUSTOM 16 + + dmxMethod = DMX_METHOD_MPEG_AMD4; /* default */ + + if ((pParams->dmxProfile == DMX_PRFL_FORCE_MATRIX_MIX) && + (pMetaData->typeFlags & TYPE_PCE_DATA)) { + dmxMethod = DMX_METHOD_MPEG_LEGACY; + } else if (!(pMetaData->typeFlags & + (TYPE_DSE_CLEV_DATA | TYPE_DSE_SLEV_DATA))) { + switch (pParams->dmxProfile) { + default: + case DMX_PRFL_STANDARD: + /* dmxMethod = DMX_METHOD_MPEG_AMD4; */ + break; + case DMX_PRFL_MATRIX_MIX: + case DMX_PRFL_FORCE_MATRIX_MIX: + if (pMetaData->typeFlags & TYPE_PCE_DATA) { + dmxMethod = DMX_METHOD_MPEG_LEGACY; + } + break; + case DMX_PRFL_ARIB_JAPAN: + dmxMethod = DMX_METHOD_ARIB_JAPAN; + break; + } + } + + /* SECOND STAGE: */ + if (numOutChannel <= TWO_CHANNEL) { + /* Create DMX matrix according to input configuration */ + switch (inChMode) { + case CH_MODE_2_0_0_0: /* chCfg 2 */ + /* Apply the dual channel mode. */ + switch (pParams->dualChannelMode) { + case CH1_MODE: /* L' = 0.707 * Ch1; + R' = 0.707 * Ch1; */ + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0); + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0); + break; + case CH2_MODE: /* L' = 0.707 * Ch2; + R' = 0.707 * Ch2; */ + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0); + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0); + break; + case MIXED_MODE: /* L' = 0.5*Ch1 + 0.5*Ch2; + R' = 0.5*Ch1 + 0.5*Ch2; */ + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, FL2FXCONST_DMX(0.5f), 0); + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, FL2FXCONST_DMX(0.5f), 0); + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, FL2FXCONST_DMX(0.5f), 0); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, FL2FXCONST_DMX(0.5f), 0); + break; + default: + case STEREO_MODE: + /* Nothing to do */ + break; + } + break; + /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + * - - - - - - - - - - - - - - - - - - - */ + case CH_MODE_2_0_1_0: { + FIXP_DMX sMixLvl; + if (dmxMethod == DMX_METHOD_ARIB_JAPAN) { + /* L' = 0.707*L + 0.5*S; R' = 0.707*R + 0.5*S; */ + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0); + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0); + sMixLvl = FL2FXCONST_DMX(0.5f); + } else { /* L' = L + 0.707*S; R' = R + 0.707*S; */ + sMixLvl = FL2FXCONST_DMX(0.707f); + } + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_REAR_CHANNEL, sMixLvl, 0); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + LEFT_REAR_CHANNEL, sMixLvl, 0); + } break; + /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + * - - - - - - - - - - - - - - - - - - - */ + case CH_MODE_3_0_0_0: /* chCfg 3 */ + { + FIXP_DMX cMixLvl; + if (dmxMethod == DMX_METHOD_ARIB_JAPAN) { + /* L' = 0.707*L + 0.5*C; R' = 0.707*R + 0.5*C; */ + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0); + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0); + cMixLvl = FL2FXCONST_DMX(0.5f); + } else { /* L' = L + 0.707*C; R' = R + 0.707*C; */ + cMixLvl = FL2FXCONST_DMX(0.707f); + } + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + CENTER_FRONT_CHANNEL, cMixLvl, 0); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + CENTER_FRONT_CHANNEL, cMixLvl, 0); + } break; + /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + * - - - - - - - - - - - - - - - - - - - */ + case CH_MODE_3_0_1_0: /* chCfg 4 */ + { + FIXP_DMX csMixLvl; + if (dmxMethod == DMX_METHOD_ARIB_JAPAN) { + /* L' = 0.707*L + 0.5*C + 0.5*S; R' = 0.707*R + 0.5*C + 0.5*S; */ + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0); + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0); + csMixLvl = FL2FXCONST_DMX(0.5f); + } else { /* L' = L + 0.707*C + 0.707*S; + R' = R + 0.707*C + 0.707*S; */ + csMixLvl = FL2FXCONST_DMX(0.707f); + } + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + CENTER_FRONT_CHANNEL, csMixLvl, 0); + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_REAR_CHANNEL, csMixLvl, 0); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + CENTER_FRONT_CHANNEL, csMixLvl, 0); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + LEFT_REAR_CHANNEL, csMixLvl, 0); + } break; + /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + * - - - - - - - - - - - - - - - - - - - */ + case CH_MODE_3_0_2_0: /* chCfg 5 */ + case CH_MODE_3_0_2_1: /* chCfg 6 */ + { + switch (dmxMethod) { + default: + case DMX_METHOD_MPEG_AMD4: { + FIXP_DMX cMixLvl, sMixLvl, lMixLvl; + INT cMixScale, sMixScale, lMixScale; + + /* Get factors from meta data */ + cMixLvl = abMixLvlValueTab[pMetaData->cLevIdx]; + cMixScale = (pMetaData->cLevIdx == 0) ? 1 : 0; + sMixLvl = abMixLvlValueTab[pMetaData->sLevIdx]; + sMixScale = (pMetaData->sLevIdx == 0) ? 1 : 0; + lMixLvl = lfeMixLvlValueTab[pMetaData->dmixIdxLfe]; + if (pMetaData->dmixIdxLfe <= 1) { + lMixScale = 2; + } else if (pMetaData->dmixIdxLfe <= 5) { + lMixScale = 1; + } else { + lMixScale = 0; + } + /* Setup the DMX matrix */ + if ((pParams->pseudoSurrMode == FORCE_PS_DMX) || + ((pParams->pseudoSurrMode == AUTO_PS_DMX) && + (pMetaData->pseudoSurround == + 1))) { /* L' = L + C*clev - (Ls+Rs)*slev + LFE*lflev; + R' = R + C*clev + (Ls+Rs)*slev + LFE*lflev; */ + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + CENTER_FRONT_CHANNEL, cMixLvl, cMixScale); + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_REAR_CHANNEL, -sMixLvl, sMixScale); + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + RIGHT_REAR_CHANNEL, -sMixLvl, sMixScale); + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LOW_FREQUENCY_CHANNEL, lMixLvl, lMixScale); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + CENTER_FRONT_CHANNEL, cMixLvl, cMixScale); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + LEFT_REAR_CHANNEL, sMixLvl, sMixScale); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_REAR_CHANNEL, sMixLvl, sMixScale); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + LOW_FREQUENCY_CHANNEL, lMixLvl, lMixScale); + } else { /* L' = L + C*clev + Ls*slev + LFE*llev; + R' = R + C*clev + Rs*slev + LFE*llev; */ + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + CENTER_FRONT_CHANNEL, cMixLvl, cMixScale); + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_REAR_CHANNEL, sMixLvl, sMixScale); + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LOW_FREQUENCY_CHANNEL, lMixLvl, lMixScale); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + CENTER_FRONT_CHANNEL, cMixLvl, cMixScale); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_REAR_CHANNEL, sMixLvl, sMixScale); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + LOW_FREQUENCY_CHANNEL, lMixLvl, lMixScale); + } + + /* Add additional DMX gain */ + if (pMetaData->dmxGainIdx2 != 0) { /* Apply DMX gain 2 */ + FIXP_DMX dmxGain; + INT dmxScale; + INT sign = (pMetaData->dmxGainIdx2 & 0x40) ? -1 : 1; + INT val = pMetaData->dmxGainIdx2 & 0x3F; + + /* 10^(dmx_gain_2/80) */ + dmxGain = FX_DBL2FX_DMX( + fLdPow(FL2FXCONST_DBL(0.830482023721841f), 2, /* log2(10) */ + (FIXP_DBL)(sign * val * (LONG)FL2FXCONST_DBL(0.0125f)), + 0, &dmxScale)); + /* Currently only positive scale factors supported! */ + if (dmxScale < 0) { + dmxGain >>= -dmxScale; + dmxScale = 0; + } + + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, dmxGain, dmxScale); + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, dmxGain, dmxScale); + } + } break; + case DMX_METHOD_ARIB_JAPAN: + case DMX_METHOD_MPEG_LEGACY: { + FIXP_DMX flev, clev, slevLL, slevLR, slevRL, slevRR; + FIXP_DMX mtrxMixDwnCoef = + mpegMixDownIdx2Coef[pMetaData->matrixMixdownIdx]; + + if ((pParams->pseudoSurrMode == FORCE_PS_DMX) || + ((pParams->pseudoSurrMode == AUTO_PS_DMX) && + (pMetaData->pseudoSurround == 1))) { + if (dmxMethod == DMX_METHOD_ARIB_JAPAN) { + /* 3/2 input: L' = 0.707 * [L+0.707*C-k*Ls-k*Rs]; + R' = 0.707 * [R+0.707*C+k*Ls+k*Rs]; */ + flev = mpegMixDownIdx2Coef[0]; /* a = 0.707 */ + } else { /* 3/2 input: L' = (1.707+2*A)^-1 * + [L+0.707*C-A*Ls-A*Rs]; R' = (1.707+2*A)^-1 * + [R+0.707*C+A*Ls+A*Rs]; */ + flev = mpegMixDownIdx2PreFact[1][pMetaData->matrixMixdownIdx]; + } + slevRR = slevRL = FX_DBL2FX_DMX(fMult(flev, mtrxMixDwnCoef)); + slevLL = slevLR = -slevRL; + } else { + if (dmxMethod == DMX_METHOD_ARIB_JAPAN) { + /* 3/2 input: L' = 0.707 * [L+0.707*C+k*Ls]; + R' = 0.707 * [R+0.707*C+k*Rs]; */ + flev = mpegMixDownIdx2Coef[0]; /* a = 0.707 */ + } else { /* 3/2 input: L' = (1.707+A)^-1 * [L+0.707*C+A*Ls]; + R' = (1.707+A)^-1 * [R+0.707*C+A*Rs]; */ + flev = mpegMixDownIdx2PreFact[0][pMetaData->matrixMixdownIdx]; + } + slevRR = slevLL = FX_DBL2FX_DMX(fMult(flev, mtrxMixDwnCoef)); + slevLR = slevRL = (FIXP_DMX)0; + } + /* common factor */ + clev = + FX_DBL2FX_DMX(fMult(flev, mpegMixDownIdx2Coef[0] /* 0.707 */)); + + dmxSetChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, flev, 0); + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + CENTER_FRONT_CHANNEL, clev, 0); + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + LEFT_REAR_CHANNEL, slevLL, 0); + dmxAddChannel(mixFactors, mixScales, LEFT_FRONT_CHANNEL, + RIGHT_REAR_CHANNEL, slevLR, 0); + + dmxSetChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, flev, 0); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + CENTER_FRONT_CHANNEL, clev, 0); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + LEFT_REAR_CHANNEL, slevRL, 0); + dmxAddChannel(mixFactors, mixScales, RIGHT_FRONT_CHANNEL, + RIGHT_REAR_CHANNEL, slevRR, 0); + } break; + } /* switch (dmxMethod) */ + } break; + default: + /* This configuration does not fit to any known downmix equation! */ + err = PCMDMX_INVALID_MODE; + break; + } /* switch (inChMode) */ + + /* Mark the output channels */ + FDKmemclear(valid, (8) * sizeof(unsigned int)); + valid[LEFT_FRONT_CHANNEL] = 1; + valid[RIGHT_FRONT_CHANNEL] = 1; + } + + if (numOutChannel == ONE_CHANNEL) { + FIXP_DMX monoMixLevel; + INT monoMixScale = 0; + + dmxClearChannel(mixFactors, mixScales, + CENTER_FRONT_CHANNEL); /* C is not in the mix */ + + if (dmxMethod == + DMX_METHOD_MPEG_LEGACY) { /* C' = (3+2*A)^-1 * [C+L+R+A*Ls+A+Rs]; */ + monoMixLevel = mpegMixDownIdx2PreFact[2][pMetaData->matrixMixdownIdx]; + + mixFactors[CENTER_FRONT_CHANNEL][CENTER_FRONT_CHANNEL] = monoMixLevel; + mixFactors[CENTER_FRONT_CHANNEL][LEFT_FRONT_CHANNEL] = monoMixLevel; + mixFactors[CENTER_FRONT_CHANNEL][RIGHT_FRONT_CHANNEL] = monoMixLevel; + monoMixLevel = FX_DBL2FX_DMX(fMult( + monoMixLevel, mpegMixDownIdx2Coef[pMetaData->matrixMixdownIdx])); + mixFactors[CENTER_FRONT_CHANNEL][LEFT_REAR_CHANNEL] = monoMixLevel; + mixFactors[CENTER_FRONT_CHANNEL][RIGHT_REAR_CHANNEL] = monoMixLevel; + } else { + switch (dmxMethod) { + case DMX_METHOD_MPEG_AMD4: + /* C' = L + R; */ + monoMixLevel = FL2FXCONST_DMX(0.5f); + monoMixScale = 1; + break; + default: + /* C' = 0.5*L + 0.5*R; */ + monoMixLevel = FL2FXCONST_DMX(0.5f); + monoMixScale = 0; + break; + } + dmxSetChannel(mixFactors, mixScales, CENTER_FRONT_CHANNEL, + LEFT_FRONT_CHANNEL, monoMixLevel, monoMixScale); + dmxAddChannel(mixFactors, mixScales, CENTER_FRONT_CHANNEL, + RIGHT_FRONT_CHANNEL, monoMixLevel, monoMixScale); + } + + /* Mark the output channel */ + FDKmemclear(valid, (8) * sizeof(unsigned int)); + valid[CENTER_FRONT_CHANNEL] = 1; + } + +#define MAX_SEARCH_START_VAL (-7) + + { + LONG chSum[(8)]; + INT chSumMax = MAX_SEARCH_START_VAL; + + /* Determine the current maximum scale factor */ + for (outCh = 0; outCh < (8); outCh += 1) { + if (valid[outCh] != 0) { + unsigned int inCh; + for (inCh = 0; inCh < (8); inCh += 1) { + if (mixScales[outCh][inCh] > maxScale) { /* Store the new maximum */ + maxScale = mixScales[outCh][inCh]; + } + } + } + } + + /* Individualy analyse output chanal levels */ + for (outCh = 0; outCh < (8); outCh += 1) { + chSum[outCh] = MAX_SEARCH_START_VAL; + if (valid[outCh] != 0) { + int ovrflwProtScale = 0; + unsigned int inCh; + + /* Accumulate all factors for each output channel */ + chSum[outCh] = 0; + for (inCh = 0; inCh < (8); inCh += 1) { + SHORT addFact = FX_DMX2SHRT(mixFactors[outCh][inCh]); + if (mixScales[outCh][inCh] <= maxScale) { + addFact >>= maxScale - mixScales[outCh][inCh]; + } else { + addFact <<= mixScales[outCh][inCh] - maxScale; + } + chSum[outCh] += addFact; + } + if (chSum[outCh] > (LONG)MAXVAL_SGL) { + while (chSum[outCh] > (LONG)MAXVAL_SGL) { + ovrflwProtScale += 1; + chSum[outCh] >>= 1; + } + } else if (chSum[outCh] > 0) { + while ((chSum[outCh] << 1) <= (LONG)MAXVAL_SGL) { + ovrflwProtScale -= 1; + chSum[outCh] <<= 1; + } + } + /* Store the differential scaling in the same array */ + chSum[outCh] = ovrflwProtScale; + } + } + + for (outCh = 0; outCh < (8); outCh += 1) { + if ((valid[outCh] != 0) && + (chSum[outCh] > chSumMax)) { /* Store the new maximum */ + chSumMax = chSum[outCh]; + } + } + maxScale = fMax(maxScale + chSumMax, 0); + + /* Normalize all factors */ + for (outCh = 0; outCh < (8); outCh += 1) { + if (valid[outCh] != 0) { + unsigned int inCh; + for (inCh = 0; inCh < (8); inCh += 1) { + if (mixFactors[outCh][inCh] != (FIXP_DMX)0) { + if (mixScales[outCh][inCh] <= maxScale) { + mixFactors[outCh][inCh] >>= maxScale - mixScales[outCh][inCh]; + } else { + mixFactors[outCh][inCh] <<= mixScales[outCh][inCh] - maxScale; + } + mixScales[outCh][inCh] = maxScale; + } + } + } + } + } + + /* return the scale factor */ + *pOutScale = maxScale; + + return (err); +} + +/** Open and initialize an instance of the PCM downmix module + * @param [out] Pointer to a buffer receiving the handle of the new instance. + * @returns Returns an error code. + **/ +PCMDMX_ERROR pcmDmx_Open(HANDLE_PCM_DOWNMIX *pSelf) { + HANDLE_PCM_DOWNMIX self; + + if (pSelf == NULL) { + return (PCMDMX_INVALID_HANDLE); + } + + *pSelf = NULL; + + self = (HANDLE_PCM_DOWNMIX)GetPcmDmxInstance(0); + if (self == NULL) { + return (PCMDMX_OUT_OF_MEMORY); + } + + /* Reset the full instance */ + pcmDmx_Reset(self, PCMDMX_RESET_FULL); + + *pSelf = self; + + return (PCMDMX_OK); +} + +/** Reset all static values like e.g. mixdown coefficients. + * @param [in] Handle of PCM downmix module instance. + * @param [in] Flags telling which parts of the module shall be reset. + * @returns Returns an error code. + **/ +PCMDMX_ERROR pcmDmx_Reset(HANDLE_PCM_DOWNMIX self, UINT flags) { + if (self == NULL) { + return (PCMDMX_INVALID_HANDLE); + } + + if (flags & PCMDMX_RESET_PARAMS) { + PCM_DMX_USER_PARAMS *pParams = &self->userParams; + + pParams->dualChannelMode = STEREO_MODE; + pParams->pseudoSurrMode = NEVER_DO_PS_DMX; + pParams->numOutChannelsMax = (6); + pParams->numOutChannelsMin = (0); + pParams->frameDelay = 0; + pParams->expiryFrame = (0); + + self->applyProcessing = 0; + } + + if (flags & PCMDMX_RESET_BS_DATA) { + int slot; + /* Init all slots with a default set */ + for (slot = 0; slot <= (1); slot += 1) { + FDKmemcpy(&self->bsMetaData[slot], &dfltMetaData, + sizeof(DMX_BS_META_DATA)); + } + } + + return (PCMDMX_OK); +} + +/** Set one parameter for one instance of the PCM downmix module. + * @param [in] Handle of PCM downmix module instance. + * @param [in] Parameter to be set. + * @param [in] Parameter value. + * @returns Returns an error code. + **/ +PCMDMX_ERROR pcmDmx_SetParam(HANDLE_PCM_DOWNMIX self, const PCMDMX_PARAM param, + const INT value) { + switch (param) { + case DMX_PROFILE_SETTING: + switch ((DMX_PROFILE_TYPE)value) { + case DMX_PRFL_STANDARD: + case DMX_PRFL_MATRIX_MIX: + case DMX_PRFL_FORCE_MATRIX_MIX: + case DMX_PRFL_ARIB_JAPAN: + break; + default: + return (PCMDMX_UNABLE_TO_SET_PARAM); + } + if (self == NULL) return (PCMDMX_INVALID_HANDLE); + self->userParams.dmxProfile = (DMX_PROFILE_TYPE)value; + break; + + case DMX_BS_DATA_EXPIRY_FRAME: + if (self == NULL) return (PCMDMX_INVALID_HANDLE); + self->userParams.expiryFrame = (value > 0) ? (UINT)value : 0; + break; + + case DMX_BS_DATA_DELAY: + if ((value > (1)) || (value < 0)) { + return (PCMDMX_UNABLE_TO_SET_PARAM); + } + if (self == NULL) { + return (PCMDMX_INVALID_HANDLE); + } + self->userParams.frameDelay = (UCHAR)value; + break; + + case MIN_NUMBER_OF_OUTPUT_CHANNELS: + switch (value) { /* supported output channels */ + case -1: + case 0: + case ONE_CHANNEL: + case TWO_CHANNEL: + case SIX_CHANNEL: + case EIGHT_CHANNEL: + break; + default: + return (PCMDMX_UNABLE_TO_SET_PARAM); + } + if (self == NULL) return (PCMDMX_INVALID_HANDLE); + /* Store the new value */ + self->userParams.numOutChannelsMin = (value > 0) ? (SHORT)value : -1; + if ((value > 0) && (self->userParams.numOutChannelsMax > 0) && + (value > self->userParams + .numOutChannelsMax)) { /* MIN > MAX would be an invalid + state. Thus set MAX = MIN in + this case. */ + self->userParams.numOutChannelsMax = self->userParams.numOutChannelsMin; + } + break; + + case MAX_NUMBER_OF_OUTPUT_CHANNELS: + switch (value) { /* supported output channels */ + case -1: + case 0: + case ONE_CHANNEL: + case TWO_CHANNEL: + case SIX_CHANNEL: + case EIGHT_CHANNEL: + break; + default: + return (PCMDMX_UNABLE_TO_SET_PARAM); + } + if (self == NULL) return (PCMDMX_INVALID_HANDLE); + /* Store the new value */ + self->userParams.numOutChannelsMax = (value > 0) ? (SHORT)value : -1; + if ((value > 0) && + (value < self->userParams + .numOutChannelsMin)) { /* MAX < MIN would be an invalid + state. Thus set MIN = MAX in + this case. */ + self->userParams.numOutChannelsMin = self->userParams.numOutChannelsMax; + } + break; + + case DMX_DUAL_CHANNEL_MODE: + switch ((DUAL_CHANNEL_MODE)value) { + case STEREO_MODE: + case CH1_MODE: + case CH2_MODE: + case MIXED_MODE: + break; + default: + return (PCMDMX_UNABLE_TO_SET_PARAM); + } + if (self == NULL) return (PCMDMX_INVALID_HANDLE); + self->userParams.dualChannelMode = (DUAL_CHANNEL_MODE)value; + self->applyProcessing = ((DUAL_CHANNEL_MODE)value != STEREO_MODE) + ? 1 + : 0; /* Force processing if necessary. */ + break; + + case DMX_PSEUDO_SURROUND_MODE: + switch ((PSEUDO_SURROUND_MODE)value) { + case NEVER_DO_PS_DMX: + case AUTO_PS_DMX: + case FORCE_PS_DMX: + break; + default: + return (PCMDMX_UNABLE_TO_SET_PARAM); + } + if (self == NULL) return (PCMDMX_INVALID_HANDLE); + self->userParams.pseudoSurrMode = (PSEUDO_SURROUND_MODE)value; + break; + + default: + return (PCMDMX_UNKNOWN_PARAM); + } + + return (PCMDMX_OK); +} + +/** Get one parameter value of one PCM downmix module instance. + * @param [in] Handle of PCM downmix module instance. + * @param [in] Parameter to be set. + * @param [out] Pointer to buffer receiving the parameter value. + * @returns Returns an error code. + **/ +PCMDMX_ERROR pcmDmx_GetParam(HANDLE_PCM_DOWNMIX self, const PCMDMX_PARAM param, + INT *const pValue) { + PCM_DMX_USER_PARAMS *pUsrParams; + + if ((self == NULL) || (pValue == NULL)) { + return (PCMDMX_INVALID_HANDLE); + } + pUsrParams = &self->userParams; + + switch (param) { + case DMX_PROFILE_SETTING: + *pValue = (INT)pUsrParams->dmxProfile; + break; + case DMX_BS_DATA_EXPIRY_FRAME: + *pValue = (INT)pUsrParams->expiryFrame; + break; + case DMX_BS_DATA_DELAY: + *pValue = (INT)pUsrParams->frameDelay; + break; + case MIN_NUMBER_OF_OUTPUT_CHANNELS: + *pValue = (INT)pUsrParams->numOutChannelsMin; + break; + case MAX_NUMBER_OF_OUTPUT_CHANNELS: + *pValue = (INT)pUsrParams->numOutChannelsMax; + break; + case DMX_DUAL_CHANNEL_MODE: + *pValue = (INT)pUsrParams->dualChannelMode; + break; + case DMX_PSEUDO_SURROUND_MODE: + *pValue = (INT)pUsrParams->pseudoSurrMode; + break; + default: + return (PCMDMX_UNKNOWN_PARAM); + } + + return (PCMDMX_OK); +} + +/* + * Read DMX meta-data from a data stream element. + */ +PCMDMX_ERROR pcmDmx_Parse(HANDLE_PCM_DOWNMIX self, HANDLE_FDK_BITSTREAM hBs, + UINT ancDataBits, int isMpeg2) { + PCMDMX_ERROR errorStatus = PCMDMX_OK; + +#define MAX_DSE_ANC_BYTES (16) /* 15 bytes */ +#define ANC_DATA_SYNC_BYTE (0xBC) /* ancillary data sync byte. */ + + DMX_BS_META_DATA *pBsMetaData; + + int skip4Dmx = 0, skip4Ext = 0; + int dmxLvlAvail = 0, extDataAvail = 0; + UINT foundNewData = 0; + UINT minAncBits = ((isMpeg2) ? 5 : 3) * 8; + + if ((self == NULL) || (hBs == NULL)) { + return (PCMDMX_INVALID_HANDLE); + } + + /* sanity checks */ + if ((ancDataBits < minAncBits) || (ancDataBits > FDKgetValidBits(hBs))) { + return (PCMDMX_CORRUPT_ANC_DATA); + } + + pBsMetaData = &self->bsMetaData[0]; + + if (isMpeg2) { + /* skip DVD ancillary data */ + FDKpushFor(hBs, 16); + } + + /* check sync word */ + if (FDKreadBits(hBs, 8) != ANC_DATA_SYNC_BYTE) { + return (PCMDMX_CORRUPT_ANC_DATA); + } + + /* skip MPEG audio type and Dolby surround mode */ + FDKpushFor(hBs, 4); + + if (isMpeg2) { + /* int numAncBytes = */ FDKreadBits(hBs, 4); + /* advanced dynamic range control */ + if (FDKreadBit(hBs)) skip4Dmx += 24; + /* dialog normalization */ + if (FDKreadBit(hBs)) skip4Dmx += 8; + /* reproduction_level */ + if (FDKreadBit(hBs)) skip4Dmx += 8; + } else { + FDKpushFor(hBs, 2); /* drc presentation mode */ + pBsMetaData->pseudoSurround = (SCHAR)FDKreadBit(hBs); + FDKpushFor(hBs, 4); /* reserved bits */ + } + + /* downmixing levels MPEGx status */ + dmxLvlAvail = FDKreadBit(hBs); + + if (isMpeg2) { + /* scale factor CRC status */ + if (FDKreadBit(hBs)) skip4Ext += 16; + } else { + /* ancillary data extension status */ + extDataAvail = FDKreadBit(hBs); + } + + /* audio coding and compression status */ + if (FDKreadBit(hBs)) skip4Ext += 16; + /* coarse grain timecode status */ + if (FDKreadBit(hBs)) skip4Ext += 16; + /* fine grain timecode status */ + if (FDKreadBit(hBs)) skip4Ext += 16; + + /* skip the useless data to get to the DMX levels */ + FDKpushFor(hBs, skip4Dmx); + + /* downmix_levels_MPEGX */ + if (dmxLvlAvail) { + if (FDKreadBit(hBs)) { /* center_mix_level_on */ + pBsMetaData->cLevIdx = (UCHAR)FDKreadBits(hBs, 3); + foundNewData |= TYPE_DSE_CLEV_DATA; + } else { + FDKreadBits(hBs, 3); + } + if (FDKreadBit(hBs)) { /* surround_mix_level_on */ + pBsMetaData->sLevIdx = (UCHAR)FDKreadBits(hBs, 3); + foundNewData |= TYPE_DSE_SLEV_DATA; + } else { + FDKreadBits(hBs, 3); + } + } + + /* skip the useless data to get to the ancillary data extension */ + FDKpushFor(hBs, skip4Ext); + + /* anc data extension (MPEG-4 only) */ + if (extDataAvail) { + int extDmxLvlSt, extDmxGainSt, extDmxLfeSt; + + FDKreadBit(hBs); /* reserved bit */ + extDmxLvlSt = FDKreadBit(hBs); + extDmxGainSt = FDKreadBit(hBs); + extDmxLfeSt = FDKreadBit(hBs); + FDKreadBits(hBs, 4); /* reserved bits */ + + if (extDmxLvlSt) { + pBsMetaData->dmixIdxA = (UCHAR)FDKreadBits(hBs, 3); + pBsMetaData->dmixIdxB = (UCHAR)FDKreadBits(hBs, 3); + FDKreadBits(hBs, 2); /* reserved bits */ + foundNewData |= TYPE_DSE_DMIX_AB_DATA; + } + if (extDmxGainSt) { + pBsMetaData->dmxGainIdx5 = (UCHAR)FDKreadBits(hBs, 7); + FDKreadBit(hBs); /* reserved bit */ + pBsMetaData->dmxGainIdx2 = (UCHAR)FDKreadBits(hBs, 7); + FDKreadBit(hBs); /* reserved bit */ + foundNewData |= TYPE_DSE_DMX_GAIN_DATA; + } + if (extDmxLfeSt) { + pBsMetaData->dmixIdxLfe = (UCHAR)FDKreadBits(hBs, 4); + FDKreadBits(hBs, 4); /* reserved bits */ + foundNewData |= TYPE_DSE_DMIX_LFE_DATA; + } + } + + /* final sanity check on the amount of read data */ + if ((INT)FDKgetValidBits(hBs) < 0) { + errorStatus = PCMDMX_CORRUPT_ANC_DATA; + } + + if ((errorStatus == PCMDMX_OK) && (foundNewData != 0)) { + /* announce new data */ + pBsMetaData->typeFlags |= foundNewData; + /* reset expiry counter */ + pBsMetaData->expiryCount = 0; + } + + return (errorStatus); +} + +/* + * Read DMX meta-data from a data stream element. + */ +PCMDMX_ERROR pcmDmx_ReadDvbAncData(HANDLE_PCM_DOWNMIX self, UCHAR *pAncDataBuf, + UINT ancDataBytes, int isMpeg2) { + PCMDMX_ERROR errorStatus = PCMDMX_OK; + FDK_BITSTREAM bs; + HANDLE_FDK_BITSTREAM hBs = &bs; + + if (self == NULL) { + return (PCMDMX_INVALID_HANDLE); + } + + /* sanity checks */ + if ((pAncDataBuf == NULL) || (ancDataBytes == 0)) { + return (PCMDMX_CORRUPT_ANC_DATA); + } + + FDKinitBitStream(hBs, pAncDataBuf, MAX_DSE_ANC_BYTES, ancDataBytes * 8, + BS_READER); + + errorStatus = pcmDmx_Parse(self, hBs, ancDataBytes * 8, isMpeg2); + + return (errorStatus); +} + +/** Set the matrix mixdown information extracted from the PCE of an AAC + *bitstream. Note: Call only if matrix_mixdown_idx_present is true. + * @param [in] Handle of PCM downmix module instance. + * @param [in] The 2 bit matrix mixdown index extracted from PCE. + * @param [in] The pseudo surround enable flag extracted from PCE. + * @returns Returns an error code. + **/ +PCMDMX_ERROR pcmDmx_SetMatrixMixdownFromPce(HANDLE_PCM_DOWNMIX self, + int matrixMixdownPresent, + int matrixMixdownIdx, + int pseudoSurroundEnable) { + if (self == NULL) { + return (PCMDMX_INVALID_HANDLE); + } + + { + DMX_BS_META_DATA *pBsMetaData = &self->bsMetaData[0]; + + if (matrixMixdownPresent) { + pBsMetaData->pseudoSurround = (pseudoSurroundEnable) ? 1 : 0; + pBsMetaData->matrixMixdownIdx = matrixMixdownIdx & 0x03; + pBsMetaData->typeFlags |= TYPE_PCE_DATA; + /* Reset expiry counter */ + pBsMetaData->expiryCount = 0; + } + } + + return (PCMDMX_OK); +} + +/** Apply down or up mixing. + * @param [in] Handle of PCM downmix module instance. + * @param [inout] Pointer to buffer that hold the time domain signal. + * @param [in] Pointer where the amount of output samples is returned into. + * @param [in] Size of pPcmBuf. + * @param [inout] Pointer where the amount of output channels is returned into. + * @param [in] Input and output samples are processed interleaved. + * @param [inout] Array where the corresponding channel type for each output + *audio channel is stored into. + * @param [inout] Array where the corresponding channel type index for each + *output audio channel is stored into. + * @param [in] Array containing the out channel mapping to be used (From MPEG + *PCE ordering to whatever is required). + * @param [out] Pointer on a field receiving the scale factor that has to be + *applied on all samples afterwards. If the handed pointer is NULL scaling is + *done internally. + * @returns Returns an error code. + **/ +PCMDMX_ERROR pcmDmx_ApplyFrame(HANDLE_PCM_DOWNMIX self, DMX_PCM *pPcmBuf, + const int pcmBufSize, UINT frameSize, + INT *nChannels, INT fInterleaved, + AUDIO_CHANNEL_TYPE channelType[], + UCHAR channelIndices[], + const FDK_channelMapDescr *const mapDescr, + INT *pDmxOutScale) { + PCM_DMX_USER_PARAMS *pParam = NULL; + PCMDMX_ERROR errorStatus = PCMDMX_OK; + DUAL_CHANNEL_MODE dualChannelMode; + PCM_DMX_CHANNEL_MODE inChMode; + PCM_DMX_CHANNEL_MODE outChMode; + INT devNull; /* Just a dummy to avoid a lot of branches in the code */ + int numOutChannels, numInChannels; + int inStride, outStride, offset; + int dmxMaxScale, dmxScale; + int slot; + UCHAR inOffsetTable[(8)]; + + DMX_BS_META_DATA bsMetaData; + + if ((self == NULL) || (nChannels == NULL) || (channelType == NULL) || + (channelIndices == NULL) || (!FDK_chMapDescr_isValid(mapDescr))) { + return (PCMDMX_INVALID_HANDLE); + } + + /* Init the output scaling */ + dmxScale = 0; + if (pDmxOutScale != NULL) { + /* Avoid final scaling internally and hand it to the outside world. */ + *pDmxOutScale = 0; + dmxMaxScale = (3); + } else { + /* Apply the scaling internally. */ + pDmxOutScale = &devNull; /* redirect to temporal stack memory */ + dmxMaxScale = 0; + } + + pParam = &self->userParams; + numInChannels = *nChannels; + + /* Perform some input sanity checks */ + if (pPcmBuf == NULL) { + return (PCMDMX_INVALID_ARGUMENT); + } + if (frameSize == 0) { + return (PCMDMX_INVALID_ARGUMENT); + } + if (numInChannels == 0) { + return (PCMDMX_INVALID_ARGUMENT); + } + if (numInChannels > (8)) { + return (PCMDMX_INVALID_CH_CONFIG); + } + + /* Check on misconfiguration */ + FDK_ASSERT((pParam->numOutChannelsMax <= 0) || + (pParam->numOutChannelsMax >= pParam->numOutChannelsMin)); + + /* Determine if the module has to do processing */ + if ((self->applyProcessing == 0) && + ((pParam->numOutChannelsMax <= 0) || + (pParam->numOutChannelsMax >= numInChannels)) && + (pParam->numOutChannelsMin <= numInChannels)) { + /* Nothing to do */ + return (errorStatus); + } + + /* Determine the number of output channels */ + if ((pParam->numOutChannelsMax > 0) && + (numInChannels > pParam->numOutChannelsMax)) { + numOutChannels = pParam->numOutChannelsMax; + } else if (numInChannels < pParam->numOutChannelsMin) { + numOutChannels = pParam->numOutChannelsMin; + } else { + numOutChannels = numInChannels; + } + + /* Check I/O buffer size */ + if ((UINT)pcmBufSize < (UINT)numOutChannels * frameSize) { + return (PCMDMX_OUTPUT_BUFFER_TOO_SMALL); + } + + dualChannelMode = pParam->dualChannelMode; + + /* Analyse input channel configuration and get channel offset + * table that can be accessed with the fixed channel labels. */ + errorStatus = getChannelMode(numInChannels, channelType, channelIndices, + inOffsetTable, &inChMode); + if (PCMDMX_IS_FATAL_ERROR(errorStatus) || (inChMode == CH_MODE_UNDEFINED)) { + /* We don't need to restore because the channel + configuration has not been changed. Just exit. */ + return (PCMDMX_INVALID_CH_CONFIG); + } + + /* Set input stride and offset */ + if (fInterleaved) { + inStride = numInChannels; + offset = 1; /* Channel specific offset factor */ + } else { + inStride = 1; + offset = frameSize; /* Channel specific offset factor */ + } + + /* Reset downmix meta data if necessary */ + if ((pParam->expiryFrame > 0) && + (++self->bsMetaData[0].expiryCount > + pParam + ->expiryFrame)) { /* The metadata read from bitstream is too old. */ +#ifdef FDK_ASSERT_ENABLE + PCMDMX_ERROR err = pcmDmx_Reset(self, PCMDMX_RESET_BS_DATA); + FDK_ASSERT(err == PCMDMX_OK); +#else + pcmDmx_Reset(self, PCMDMX_RESET_BS_DATA); +#endif + } + FDKmemcpy(&bsMetaData, &self->bsMetaData[pParam->frameDelay], + sizeof(DMX_BS_META_DATA)); + /* Maintain delay line */ + for (slot = pParam->frameDelay; slot > 0; slot -= 1) { + FDKmemcpy(&self->bsMetaData[slot], &self->bsMetaData[slot - 1], + sizeof(DMX_BS_META_DATA)); + } + + /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + * - - - - - - - - - - - - - - - - - - */ + if (numInChannels > numOutChannels) { /* Apply downmix */ + DMX_PCM *pInPcm[(8)] = {NULL}; + DMX_PCM *pOutPcm[(8)] = {NULL}; + FIXP_DMX mixFactors[(8)][(8)]; + UCHAR outOffsetTable[(8)]; + UINT sample; + int chCfg = 0; + int bypScale = 0; + + if (numInChannels > SIX_CHANNEL) { + AUDIO_CHANNEL_TYPE multiPurposeChType[2]; + + /* Get the type of the multipurpose channels */ + multiPurposeChType[0] = + channelType[inOffsetTable[LEFT_MULTIPRPS_CHANNEL]]; + multiPurposeChType[1] = + channelType[inOffsetTable[RIGHT_MULTIPRPS_CHANNEL]]; + + /* Check if the input configuration is one defined in the standard. */ + switch (inChMode) { + case CH_MODE_5_0_2_1: /* chCfg 7 || 14 */ + /* Further analyse the input config to distinguish the two + * CH_MODE_5_0_2_1 configs. */ + if ((multiPurposeChType[0] == ACT_FRONT_TOP) && + (multiPurposeChType[1] == ACT_FRONT_TOP)) { + chCfg = 14; + } else { + chCfg = 7; + } + break; + case CH_MODE_3_0_3_1: /* chCfg 11 */ + chCfg = 11; + break; + case CH_MODE_3_0_4_1: /* chCfg 12 */ + chCfg = 12; + break; + default: + chCfg = 0; /* Not a known config */ + break; + } + } + + /* Set this stages output stride and channel mode: */ + outStride = (fInterleaved) ? numOutChannels : 1; + outChMode = outChModeTable[numOutChannels]; + FDK_ASSERT(outChMode != CH_MODE_UNDEFINED); + + /* Get channel description and channel mapping for the desired output + * configuration. */ + getChannelDescription(outChMode, mapDescr, channelType, channelIndices, + outOffsetTable); + /* Now there is no way back because we modified the channel configuration! + */ + + /* Create the DMX matrix */ + errorStatus = + getMixFactors((chCfg > 0) ? 1 : 0, + (chCfg > 0) ? (PCM_DMX_CHANNEL_MODE)chCfg : inChMode, + outChMode, pParam, &bsMetaData, mixFactors, &dmxScale); + /* No fatal errors can occur here. The function is designed to always return + a valid matrix. The error code is used to signal configurations and + matrices that are not conform to any standard. */ + + /* Determine the final scaling */ + bypScale = fMin(dmxMaxScale, dmxScale); + *pDmxOutScale += bypScale; + dmxScale -= bypScale; + + { /* Set channel pointer for input. Remove empty cols. */ + int inCh, outCh, map[(8)]; + int ch = 0; + for (inCh = 0; inCh < (8); inCh += 1) { + if (inOffsetTable[inCh] < (UCHAR)numInChannels) { + pInPcm[ch] = &pPcmBuf[inOffsetTable[inCh] * offset]; + map[ch++] = inCh; + } + } + for (; ch < (8); ch += 1) { + map[ch] = ch; + } + + /* Remove unused cols from factor matrix */ + for (inCh = 0; inCh < numInChannels; inCh += 1) { + if (inCh != map[inCh]) { + for (outCh = 0; outCh < (8); outCh += 1) { + mixFactors[outCh][inCh] = mixFactors[outCh][map[inCh]]; + } + } + } + + /* Set channel pointer for output. Remove empty cols. */ + ch = 0; + for (outCh = 0; outCh < (8); outCh += 1) { + if (outOffsetTable[outCh] < (UCHAR)numOutChannels) { + pOutPcm[ch] = &pPcmBuf[outOffsetTable[outCh] * offset]; + map[ch++] = outCh; + } + } + for (; ch < (8); ch += 1) { + map[ch] = ch; + } + + /* Remove unused rows from factor matrix */ + for (outCh = 0; outCh < numOutChannels; outCh += 1) { + if (outCh != map[outCh]) { + FDKmemcpy(&mixFactors[outCh], &mixFactors[map[outCh]], + (8) * sizeof(FIXP_DMX)); + } + } + } + + /* Sample processing loop */ + for (sample = 0; sample < frameSize; sample++) { + DMX_PCM tIn[(8)] = {0}; + FIXP_DBL tOut[(8)] = {(FIXP_DBL)0}; + int inCh, outCh; + + /* Preload all input samples */ + for (inCh = 0; inCh < numInChannels; inCh += 1) { + if (pInPcm[inCh] != NULL) { + tIn[inCh] = *pInPcm[inCh]; + pInPcm[inCh] += inStride; + } else { + tIn[inCh] = (DMX_PCM)0; + } + } + /* Apply downmix coefficients to input samples and accumulate for output + */ + for (outCh = 0; outCh < numOutChannels; outCh += 1) { + for (inCh = 0; inCh < numInChannels; inCh += 1) { + tOut[outCh] += fMult((DMX_PCMF)tIn[inCh], mixFactors[outCh][inCh]); + } + FDK_ASSERT(pOutPcm[outCh] >= pPcmBuf); + FDK_ASSERT(pOutPcm[outCh] < &pPcmBuf[pcmBufSize]); + /* Write sample */ + *pOutPcm[outCh] = (DMX_PCM)SATURATE_SHIFT( + tOut[outCh], DFRACT_BITS - DMX_PCM_BITS - dmxScale, DMX_PCM_BITS); + pOutPcm[outCh] += outStride; + } + } + + /* Update the number of output channels */ + *nChannels = numOutChannels; + + } /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - - - */ + else if (numInChannels < numOutChannels) { /* Apply rudimentary upmix */ + /* Set up channel pointer */ + UCHAR outOffsetTable[(8)]; + + /* FIRST STAGE + Create a stereo/dual channel signal */ + if (numInChannels == ONE_CHANNEL) { + DMX_PCM *pInPcm[(8)]; + DMX_PCM *pOutLF, *pOutRF; + UINT sample; + + /* Set this stages output stride and channel mode: */ + outStride = (fInterleaved) ? TWO_CHANNEL : 1; + outChMode = outChModeTable[TWO_CHANNEL]; + + /* Get channel description and channel mapping for this + * stages number of output channels (always STEREO). */ + getChannelDescription(outChMode, mapDescr, channelType, channelIndices, + outOffsetTable); + /* Now there is no way back because we modified the channel configuration! + */ + + /* Set input channel pointer. The first channel is always at index 0. */ + pInPcm[CENTER_FRONT_CHANNEL] = + &pPcmBuf[(frameSize - 1) * + inStride]; /* Considering input mapping could lead to a + invalid pointer here if the channel is not + declared to be a front channel. */ + + /* Set output channel pointer (for this stage). */ + pOutLF = &pPcmBuf[outOffsetTable[LEFT_FRONT_CHANNEL] * offset + + (frameSize - 1) * outStride]; + pOutRF = &pPcmBuf[outOffsetTable[RIGHT_FRONT_CHANNEL] * offset + + (frameSize - 1) * outStride]; + + /* 1/0 input: */ + for (sample = 0; sample < frameSize; sample++) { + /* L' = C; R' = C; */ + *pOutLF = *pOutRF = *pInPcm[CENTER_FRONT_CHANNEL]; + + pInPcm[CENTER_FRONT_CHANNEL] -= inStride; + pOutLF -= outStride; + pOutRF -= outStride; + } + + /* Prepare for next stage: */ + inStride = outStride; + inChMode = outChMode; + FDKmemcpy(inOffsetTable, outOffsetTable, (8) * sizeof(UCHAR)); + } + + /* SECOND STAGE + Extend with zero channels to achieved the desired number of output + channels. */ + if (numOutChannels > TWO_CHANNEL) { + DMX_PCM *pIn[(8)] = {NULL}; + DMX_PCM *pOut[(8)] = {NULL}; + UINT sample; + AUDIO_CHANNEL_TYPE inChTypes[(8)]; + UCHAR inChIndices[(8)]; + UCHAR numChPerGrp[2][(4)]; + int nContentCh = 0; /* Number of channels with content */ + int nEmptyCh = 0; /* Number of channels with content */ + int ch, chGrp, isCompatible = 1; + + /* Do not change the signalling which is the channel types and indices. + Just reorder and add channels. So first save the input signalling. */ + FDKmemcpy(inChTypes, channelType, + numInChannels * sizeof(AUDIO_CHANNEL_TYPE)); + FDKmemclear(inChTypes + numInChannels, + ((8) - numInChannels) * sizeof(AUDIO_CHANNEL_TYPE)); + FDKmemcpy(inChIndices, channelIndices, numInChannels * sizeof(UCHAR)); + FDKmemclear(inChIndices + numInChannels, + ((8) - numInChannels) * sizeof(UCHAR)); + + /* Set this stages output stride and channel mode: */ + outStride = (fInterleaved) ? numOutChannels : 1; + outChMode = outChModeTable[numOutChannels]; + FDK_ASSERT(outChMode != CH_MODE_UNDEFINED); + + /* Check if input channel config can be easily mapped to the desired + * output config. */ + for (chGrp = 0; chGrp < (4); chGrp += 1) { + numChPerGrp[IN][chGrp] = (inChMode >> (chGrp * 4)) & 0xF; + numChPerGrp[OUT][chGrp] = (outChMode >> (chGrp * 4)) & 0xF; + + if (numChPerGrp[IN][chGrp] > numChPerGrp[OUT][chGrp]) { + isCompatible = 0; + break; + } + } + + if (isCompatible) { + /* Get new channel description and channel + * mapping for the desired output channel mode. */ + getChannelDescription(outChMode, mapDescr, channelType, channelIndices, + outOffsetTable); + /* If the input config has a back center channel but the output + config has not, copy it to left and right (if available). */ + if ((numChPerGrp[IN][CH_GROUP_REAR] % 2) && + !(numChPerGrp[OUT][CH_GROUP_REAR] % 2)) { + if (numChPerGrp[IN][CH_GROUP_REAR] == 1) { + inOffsetTable[RIGHT_REAR_CHANNEL] = + inOffsetTable[LEFT_REAR_CHANNEL]; + } else if (numChPerGrp[IN][CH_GROUP_REAR] == 3) { + inOffsetTable[RIGHT_MULTIPRPS_CHANNEL] = + inOffsetTable[LEFT_MULTIPRPS_CHANNEL]; + } + } + } else { + /* Just copy and extend the original config */ + FDKmemcpy(outOffsetTable, inOffsetTable, (8) * sizeof(UCHAR)); + } + + /* Set I/O channel pointer. + Note: The following assignment algorithm clears the channel offset + tables. Thus they can not be used afterwards. */ + for (ch = 0; ch < (8); ch += 1) { + if ((outOffsetTable[ch] < 255) && + (inOffsetTable[ch] < 255)) { /* Set I/O pointer: */ + pIn[nContentCh] = + &pPcmBuf[inOffsetTable[ch] * offset + (frameSize - 1) * inStride]; + pOut[nContentCh] = &pPcmBuf[outOffsetTable[ch] * offset + + (frameSize - 1) * outStride]; + /* Update signalling */ + channelType[outOffsetTable[ch]] = inChTypes[inOffsetTable[ch]]; + channelIndices[outOffsetTable[ch]] = inChIndices[inOffsetTable[ch]]; + inOffsetTable[ch] = 255; + outOffsetTable[ch] = 255; + nContentCh += 1; + } + } + if (isCompatible) { + /* Assign the remaining input channels. + This is just a safety appliance. We should never need it. */ + for (ch = 0; ch < (8); ch += 1) { + if (inOffsetTable[ch] < 255) { + int outCh; + for (outCh = 0; outCh < (8); outCh += 1) { + if (outOffsetTable[outCh] < 255) { + break; + } + } + if (outCh >= (8)) { + FDK_ASSERT(0); + break; + } + /* Set I/O pointer: */ + pIn[nContentCh] = &pPcmBuf[inOffsetTable[ch] * offset + + (frameSize - 1) * inStride]; + pOut[nContentCh] = &pPcmBuf[outOffsetTable[outCh] * offset + + (frameSize - 1) * outStride]; + /* Update signalling */ + FDK_ASSERT(inOffsetTable[outCh] < numInChannels); + FDK_ASSERT(outOffsetTable[outCh] < numOutChannels); + channelType[outOffsetTable[outCh]] = inChTypes[inOffsetTable[ch]]; + channelIndices[outOffsetTable[outCh]] = + inChIndices[inOffsetTable[ch]]; + inOffsetTable[ch] = 255; + outOffsetTable[outCh] = 255; + nContentCh += 1; + } + } + /* Set the remaining output channel pointer */ + for (ch = 0; ch < (8); ch += 1) { + if (outOffsetTable[ch] < 255) { + pOut[nContentCh + nEmptyCh] = &pPcmBuf[outOffsetTable[ch] * offset + + (frameSize - 1) * outStride]; + /* Expand output signalling */ + channelType[outOffsetTable[ch]] = ACT_NONE; + channelIndices[outOffsetTable[ch]] = (UCHAR)nEmptyCh; + outOffsetTable[ch] = 255; + nEmptyCh += 1; + } + } + } else { + /* Set the remaining output channel pointer */ + for (ch = nContentCh; ch < numOutChannels; ch += 1) { + pOut[ch] = &pPcmBuf[ch * offset + (frameSize - 1) * outStride]; + /* Expand output signalling */ + channelType[ch] = ACT_NONE; + channelIndices[ch] = (UCHAR)nEmptyCh; + nEmptyCh += 1; + } + } + + /* First copy the channels that have signal */ + for (sample = 0; sample < frameSize; sample += 1) { + DMX_PCM tIn[(8)]; + /* Read all channel samples */ + for (ch = 0; ch < nContentCh; ch += 1) { + tIn[ch] = *pIn[ch]; + pIn[ch] -= inStride; + } + /* Write all channel samples */ + for (ch = 0; ch < nContentCh; ch += 1) { + *pOut[ch] = tIn[ch]; + pOut[ch] -= outStride; + } + } + + /* Clear all the other channels */ + for (sample = 0; sample < frameSize; sample++) { + for (ch = nContentCh; ch < numOutChannels; ch += 1) { + *pOut[ch] = (DMX_PCM)0; + pOut[ch] -= outStride; + } + } + } + + /* update the number of output channels */ + *nChannels = numOutChannels; + } /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - - - */ + else if (numInChannels == numOutChannels) { + /* Don't need to change the channel description here */ + + switch (numInChannels) { + case 2: { /* Set up channel pointer */ + DMX_PCM *pInPcm[(8)]; + DMX_PCM *pOutL, *pOutR; + FIXP_DMX flev; + + UINT sample; + + if (fInterleaved) { + inStride = numInChannels; + outStride = + 2; /* fixed !!! (below stereo is donwmixed to mono if required */ + offset = 1; /* Channel specific offset factor */ + } else { + inStride = 1; + outStride = 1; + offset = frameSize; /* Channel specific offset factor */ + } + + /* Set input channel pointer */ + pInPcm[LEFT_FRONT_CHANNEL] = + &pPcmBuf[inOffsetTable[LEFT_FRONT_CHANNEL] * offset]; + pInPcm[RIGHT_FRONT_CHANNEL] = + &pPcmBuf[inOffsetTable[RIGHT_FRONT_CHANNEL] * offset]; + + /* Set output channel pointer (same as input) */ + pOutL = pInPcm[LEFT_FRONT_CHANNEL]; + pOutR = pInPcm[RIGHT_FRONT_CHANNEL]; + + /* Set downmix levels: */ + flev = FL2FXCONST_DMX(0.70710678f); + /* 2/0 input: */ + switch (dualChannelMode) { + case CH1_MODE: /* L' = 0.707 * Ch1; R' = 0.707 * Ch1 */ + for (sample = 0; sample < frameSize; sample++) { + *pOutL = *pOutR = (DMX_PCM)SATURATE_RIGHT_SHIFT( + fMult((DMX_PCMF)*pInPcm[LEFT_FRONT_CHANNEL], flev), + DFRACT_BITS - DMX_PCM_BITS, DMX_PCM_BITS); + + pInPcm[LEFT_FRONT_CHANNEL] += inStride; + pOutL += outStride; + pOutR += outStride; + } + break; + case CH2_MODE: /* L' = 0.707 * Ch2; R' = 0.707 * Ch2 */ + for (sample = 0; sample < frameSize; sample++) { + *pOutL = *pOutR = (DMX_PCM)SATURATE_RIGHT_SHIFT( + fMult((DMX_PCMF)*pInPcm[RIGHT_FRONT_CHANNEL], flev), + DFRACT_BITS - DMX_PCM_BITS, DMX_PCM_BITS); + + pInPcm[RIGHT_FRONT_CHANNEL] += inStride; + pOutL += outStride; + pOutR += outStride; + } + break; + case MIXED_MODE: /* L' = 0.5*Ch1 + 0.5*Ch2; R' = 0.5*Ch1 + 0.5*Ch2 */ + for (sample = 0; sample < frameSize; sample++) { + *pOutL = *pOutR = (*pInPcm[LEFT_FRONT_CHANNEL] >> 1) + + (*pInPcm[RIGHT_FRONT_CHANNEL] >> 1); + + pInPcm[LEFT_FRONT_CHANNEL] += inStride; + pInPcm[RIGHT_FRONT_CHANNEL] += inStride; + pOutL += outStride; + pOutR += outStride; + } + break; + default: + case STEREO_MODE: + /* nothing to do */ + break; + } + } break; + + default: + /* nothing to do */ + break; + } + } + + return (errorStatus); +} + +/** Close an instance of the PCM downmix module. + * @param [inout] Pointer to a buffer containing the handle of the instance. + * @returns Returns an error code. + **/ +PCMDMX_ERROR pcmDmx_Close(HANDLE_PCM_DOWNMIX *pSelf) { + if (pSelf == NULL) { + return (PCMDMX_INVALID_HANDLE); + } + + FreePcmDmxInstance(pSelf); + *pSelf = NULL; + + return (PCMDMX_OK); +} + +/** Get library info for this module. + * @param [out] Pointer to an allocated LIB_INFO structure. + * @returns Returns an error code. + */ +PCMDMX_ERROR pcmDmx_GetLibInfo(LIB_INFO *info) { + int i; + + if (info == NULL) { + return PCMDMX_INVALID_ARGUMENT; + } + + /* Search for next free tab */ + for (i = 0; i < FDK_MODULE_LAST; i++) { + if (info[i].module_id == FDK_NONE) break; + } + if (i == FDK_MODULE_LAST) { + return PCMDMX_INVALID_ARGUMENT; + } + + /* Add the library info */ + info[i].module_id = FDK_PCMDMX; + info[i].version = + LIB_VERSION(PCMUTIL_LIB_VL0, PCMUTIL_LIB_VL1, PCMUTIL_LIB_VL2); + LIB_VERSION_STRING(info + i); + info[i].build_date = PCMUTIL_LIB_BUILD_DATE; + info[i].build_time = PCMUTIL_LIB_BUILD_TIME; + info[i].title = PCMDMX_LIB_TITLE; + + /* Set flags */ + info[i].flags = 0 | CAPF_DMX_BLIND /* At least blind downmixing is possible */ + | CAPF_DMX_PCE /* Guided downmix with data from MPEG-2/4 + Program Config Elements (PCE). */ + | CAPF_DMX_ARIB /* PCE guided downmix with slightly different + equations and levels. */ + | CAPF_DMX_DVB /* Guided downmix with data from DVB ancillary + data fields. */ + | CAPF_DMX_CH_EXP /* Simple upmixing by dublicating channels + or adding zero channels. */ + | CAPF_DMX_6_CH | CAPF_DMX_8_CH; + + /* Add lib info for FDK tools (if not yet done). */ + FDK_toolsGetLibInfo(info); + + return PCMDMX_OK; +} diff --git a/libPCMutils/src/pcmutils_lib.cpp b/libPCMutils/src/pcmutils_lib.cpp deleted file mode 100644 index 9303d16..0000000 --- a/libPCMutils/src/pcmutils_lib.cpp +++ /dev/null @@ -1,2510 +0,0 @@ - -/* ----------------------------------------------------------------------------------------------------------- -Software License for The Fraunhofer FDK AAC Codec Library for Android - -© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. - All rights reserved. - - 1. INTRODUCTION -The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements -the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. -This FDK AAC Codec software is intended to be used on a wide variety of Android devices. - -AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual -audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by -independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part -of the MPEG specifications. - -Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) -may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners -individually for the purpose of encoding or decoding bit streams in products that are compliant with -the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license -these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec -software may already be covered under those patent licenses when it is used for those licensed purposes only. - -Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, -are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional -applications information and documentation. - -2. COPYRIGHT LICENSE - -Redistribution and use in source and binary forms, with or without modification, are permitted without -payment of copyright license fees provided that you satisfy the following conditions: - -You must retain the complete text of this software license in redistributions of the FDK AAC Codec or -your modifications thereto in source code form. - -You must retain the complete text of this software license in the documentation and/or other materials -provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. -You must make available free of charge copies of the complete source code of the FDK AAC Codec and your -modifications thereto to recipients of copies in binary form. - -The name of Fraunhofer may not be used to endorse or promote products derived from this library without -prior written permission. - -You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec -software or your modifications thereto. - -Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software -and the date of any change. For modified versions of the FDK AAC Codec, the term -"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term -"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." - -3. NO PATENT LICENSE - -NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, -ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with -respect to this software. - -You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized -by appropriate patent licenses. - -4. DISCLAIMER - -This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors -"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties -of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR -CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, -including but not limited to procurement of substitute goods or services; loss of use, data, or profits, -or business interruption, however caused and on any theory of liability, whether in contract, strict -liability, or tort (including negligence), arising in any way out of the use of this software, even if -advised of the possibility of such damage. - -5. CONTACT INFORMATION - -Fraunhofer Institute for Integrated Circuits IIS -Attention: Audio and Multimedia Departments - FDK AAC LL -Am Wolfsmantel 33 -91058 Erlangen, Germany - -www.iis.fraunhofer.de/amm -amm-info@iis.fraunhofer.de ------------------------------------------------------------------------------------------------------------ */ - -/**************************** FDK PCM utils module ************************** - - Author(s): Christian Griebel - Description: Defines functions that perform downmixing or a simple channel - expansion in the PCM time domain. - -*******************************************************************************/ -#ifndef __linux__ -#include <log/log.h> -#endif -#include "pcmutils_lib.h" - -#include "genericStds.h" -#include "fixpoint_math.h" -#include "FDK_core.h" - - -/* ------------------------ * - * GLOBAL SETTINGS (GFR): * - * ------------------------ */ -#define DSE_METADATA_ENABLE /*!< Enable this to support MPEG/ETSI DVB ancillary data for - encoder assisted downmixing of MPEG-4 AAC and - MPEG-1/2 layer 2 streams. */ -#define PCE_METADATA_ENABLE /*!< Enable this to support MPEG matrix mixdown with a - coefficient carried in the PCE. */ - -#define PCM_DMX_MAX_IN_CHANNELS ( 8 ) /* Neither the maximum number of input nor the maximum number of output channels ... */ -#define PCM_DMX_MAX_OUT_CHANNELS ( 8 ) /* ... must exceed the maximum number of channels that the framework can handle. */ - -/* ------------------------ * - * SPECIFIC SETTINGS: * - * ------------------------ */ -#define PCM_CHANNEL_EXTENSION_ENABLE /*!< Allow module to duplicate mono signals or add zero channels to achieve the - desired number of output channels. */ - -#define PCM_DMX_DFLT_MAX_OUT_CHANNELS ( 6 ) /*!< The maximum number of output channels. If the value is greater than 0 the module - will automatically create a mixdown for all input signals with more channels - than specified. */ -#define PCM_DMX_DFLT_MIN_OUT_CHANNELS ( 0 ) /*!< The minimum number of output channels. If the value is greater than 0 the module - will do channel extension automatically for all input signals with less channels - than specified. */ -#define PCM_DMX_MAX_DELAY_FRAMES ( 1 ) /*!< The maximum delay frames to align the bitstreams payload with the PCM output. */ -#define PCM_DMX_DFLT_EXPIRY_FRAME ( 50 ) /*!< If value is greater than 0 the mixdown coefficients will expire by default after the - given number of frames. The value 50 corresponds to at least 500ms (FL 960 @ 96kHz) */ -/* #define PCMDMX_DEBUG */ - -/* Derived setting: - * No need to edit beyond this line. */ -#if defined(DSE_METADATA_ENABLE) || defined(PCE_METADATA_ENABLE) || defined(ARIB_MIXDOWN_ENABLE) - #define PCM_DOWNMIX_ENABLE /*!< Generally enable down mixing. */ -#endif -#if (PCM_DMX_MAX_IN_CHANNELS > 2) || (PCM_DMX_MAX_OUT_CHANNELS > 2) - #define PCM_DMX_MAX_CHANNELS ( 8 ) - #define PCM_DMX_MAX_CHANNEL_GROUPS ( 4 ) - #define PCM_DMX_MAX_CHANNELS_PER_GROUP PCM_DMX_MAX_CHANNELS /* All channels can be in one group */ -#else - #define PCM_DMX_MAX_CHANNELS ( 3 ) /* Need to add 1 because there are three channel positions in first channel group. */ - #define PCM_DMX_MAX_CHANNEL_GROUPS ( 1 ) /* Only front channels supported. */ - #define PCM_DMX_MAX_CHANNELS_PER_GROUP ( 2 ) /* The maximum over all channel groups */ -#endif -#if (PCM_DMX_MAX_IN_CHANNELS > PCM_DMX_MAX_OUT_CHANNELS) - #define PCM_DMX_MAX_IO_CHANNELS PCM_DMX_MAX_IN_CHANNELS -#else - #define PCM_DMX_MAX_IO_CHANNELS PCM_DMX_MAX_OUT_CHANNELS -#endif - -/* Decoder library info */ -#define PCMDMX_LIB_VL0 2 -#define PCMDMX_LIB_VL1 4 -#define PCMDMX_LIB_VL2 2 -#define PCMDMX_LIB_TITLE "PCM Downmix Lib" -#ifdef __ANDROID__ -#define PCMDMX_LIB_BUILD_DATE "" -#define PCMDMX_LIB_BUILD_TIME "" -#else -#define PCMDMX_LIB_BUILD_DATE __DATE__ -#define PCMDMX_LIB_BUILD_TIME __TIME__ -#endif - - -/* Fixed and unique channel group indices. - * The last group index has to be smaller than PCM_DMX_MAX_CHANNEL_GROUPS. */ -#define CH_GROUP_FRONT ( 0 ) -#define CH_GROUP_SIDE ( 1 ) -#define CH_GROUP_REAR ( 2 ) -#define CH_GROUP_LFE ( 3 ) - -/* The ordering of the following fixed channel labels has to be in MPEG-4 style. - * From the center to the back with left and right channel interleaved (starting with left). - * The last channel label index has to be smaller than PCM_DMX_MAX_CHANNELS. */ -#define CENTER_FRONT_CHANNEL ( 0 ) /* C */ -#define LEFT_FRONT_CHANNEL ( 1 ) /* L */ -#define RIGHT_FRONT_CHANNEL ( 2 ) /* R */ -#define LEFT_REAR_CHANNEL ( 3 ) /* Lr (aka left back channel) or center back channel */ -#define RIGHT_REAR_CHANNEL ( 4 ) /* Rr (aka right back channel) */ -#define LOW_FREQUENCY_CHANNEL ( 5 ) /* Lf */ -#define LEFT_MULTIPRPS_CHANNEL ( 6 ) /* Left multipurpose channel */ -#define RIGHT_MULTIPRPS_CHANNEL ( 7 ) /* Right multipurpose channel */ - -/* More constants */ -#define ONE_CHANNEL ( 1 ) -#define TWO_CHANNEL ( 2 ) -#define SIX_CHANNEL ( 6 ) -#define EIGHT_CHANNEL ( 8 ) - -#define PCMDMX_A_IDX_DEFAULT ( 2 ) -#define PCMDMX_B_IDX_DEFAULT ( 2 ) -#define PCMDMX_LFE_IDX_DEFAULT ( 15 ) -#define PCMDMX_GAIN_5_DEFAULT ( 0 ) -#define PCMDMX_GAIN_2_DEFAULT ( 0 ) - -#define PCMDMX_MAX_HEADROOM ( 3 ) /* Defines the maximum PCM scaling headroom that can be done by a - postprocessing step. This value must be greater or equal to 0. */ - -#define FALSE 0 -#define TRUE 1 -#define IN 0 -#define OUT 1 - -/* Type definitions: */ -#ifndef DMX_HIGH_PRECISION_ENABLE - #define FIXP_DMX FIXP_SGL - #define FX_DMX2FX_DBL(x) FX_SGL2FX_DBL((FIXP_SGL)(x)) - #define FX_DBL2FX_DMX(x) FX_DBL2FX_SGL(x) - #define FL2FXCONST_DMX(x) FL2FXCONST_SGL(x) - #define MAXVAL_DMX MAXVAL_SGL - #define FX_DMX2SHRT(x) ((SHORT)(x)) - #define FX_DMX2FL(x) FX_DBL2FL(FX_DMX2FX_DBL(x)) -#else - #define FIXP_DMX FIXP_DBL - #define FX_DMX2FX_DBL(x) ((FIXP_DBL)(x)) - #define FX_DBL2FX_DMX(x) ((FIXP_DBL)(x) - #define FL2FXCONST_DMX(x) FL2FXCONST_DBL(x) - #define MAXVAL_DMX MAXVAL_DBL - #define FX_DMX2SHRT(x) ((SHORT)((x)>>FRACT_BITS)) - #define FX_DMX2FL(x) FX_DBL2FL(x) -#endif - -/* The number of channels positions for each group in the internal representation. - * See the channel labels above. */ -static const UCHAR maxChInGrp[PCM_DMX_MAX_CHANNEL_GROUPS] = { -#if (PCM_DMX_MAX_CHANNELS > 3) - 3, 0, 2, 1 -#else - PCM_DMX_MAX_CHANNELS_PER_GROUP -#endif -}; - -/* List of packed channel modes */ -typedef enum -{ /* CH_MODE_<numFrontCh>_<numSideCh>_<numBackCh>_<numLfCh> */ - CH_MODE_UNDEFINED = 0x0000, - /* 1 channel */ - CH_MODE_1_0_0_0 = 0x0001, /* chCfg 1 */ - /* 2 channels */ - CH_MODE_2_0_0_0 = 0x0002, /* chCfg 2 */ - /* 3 channels */ - CH_MODE_3_0_0_0 = 0x0003, /* chCfg 3 */ - CH_MODE_2_0_1_0 = 0x0102, - CH_MODE_2_0_0_1 = 0x1002, - /* 4 channels */ - CH_MODE_3_0_1_0 = 0x0103, /* chCfg 4 */ - CH_MODE_2_0_2_0 = 0x0202, - CH_MODE_2_0_1_1 = 0x1102, - CH_MODE_4_0_0_0 = 0x0004, - /* 5 channels */ - CH_MODE_3_0_2_0 = 0x0203, /* chCfg 5 */ - CH_MODE_2_0_2_1 = 0x1202, - CH_MODE_3_0_1_1 = 0x1103, - CH_MODE_3_2_0_0 = 0x0023, - CH_MODE_5_0_0_0 = 0x0005, - /* 6 channels */ - CH_MODE_3_0_2_1 = 0x1203, /* chCfg 6 */ - CH_MODE_3_2_0_1 = 0x1023, - CH_MODE_3_2_1_0 = 0x0123, - CH_MODE_5_0_1_0 = 0x0105, - CH_MODE_6_0_0_0 = 0x0006, - /* 7 channels */ - CH_MODE_2_2_2_1 = 0x1222, - CH_MODE_3_0_3_1 = 0x1303, /* chCfg 11 */ - CH_MODE_3_2_1_1 = 0x1123, - CH_MODE_3_2_2_0 = 0x0223, - CH_MODE_3_0_2_2 = 0x2203, - CH_MODE_5_0_2_0 = 0x0205, - CH_MODE_5_0_1_1 = 0x1105, - CH_MODE_7_0_0_0 = 0x0007, - /* 8 channels */ - CH_MODE_3_2_2_1 = 0x1223, - CH_MODE_3_0_4_1 = 0x1403, /* chCfg 12 */ - CH_MODE_5_0_2_1 = 0x1205, /* chCfg 7 + 14 */ - CH_MODE_5_2_1_0 = 0x0125, - CH_MODE_3_2_1_2 = 0x2123, - CH_MODE_2_2_2_2 = 0x2222, - CH_MODE_3_0_3_2 = 0x2303, - CH_MODE_8_0_0_0 = 0x0008 - -} PCM_DMX_CHANNEL_MODE; - - -/* These are the channel configurations linked to - the number of output channels give by the user: */ -static const PCM_DMX_CHANNEL_MODE outChModeTable[PCM_DMX_MAX_CHANNELS+1] = -{ - CH_MODE_UNDEFINED, - CH_MODE_1_0_0_0, /* 1 channel */ - CH_MODE_2_0_0_0, /* 2 channels */ - CH_MODE_3_0_0_0 /* 3 channels */ -#if (PCM_DMX_MAX_CHANNELS > 3) - ,CH_MODE_3_0_1_0, /* 4 channels */ - CH_MODE_3_0_2_0, /* 5 channels */ - CH_MODE_3_0_2_1, /* 6 channels */ - CH_MODE_3_0_3_1, /* 7 channels */ - CH_MODE_3_0_4_1 /* 8 channels */ -#endif -}; - -static const FIXP_DMX abMixLvlValueTab[8] = -{ - FL2FXCONST_DMX(0.500f), /* scaled by 1 */ - FL2FXCONST_DMX(0.841f), - FL2FXCONST_DMX(0.707f), - FL2FXCONST_DMX(0.596f), - FL2FXCONST_DMX(0.500f), - FL2FXCONST_DMX(0.422f), - FL2FXCONST_DMX(0.355f), - FL2FXCONST_DMX(0.0f) -}; - -static const FIXP_DMX lfeMixLvlValueTab[16] = -{ /* value, scale */ - FL2FXCONST_DMX(0.7905f), /* 2 */ - FL2FXCONST_DMX(0.5000f), /* 2 */ - FL2FXCONST_DMX(0.8395f), /* 1 */ - FL2FXCONST_DMX(0.7065f), /* 1 */ - FL2FXCONST_DMX(0.5945f), /* 1 */ - FL2FXCONST_DMX(0.500f), /* 1 */ - FL2FXCONST_DMX(0.841f), /* 0 */ - FL2FXCONST_DMX(0.707f), /* 0 */ - FL2FXCONST_DMX(0.596f), /* 0 */ - FL2FXCONST_DMX(0.500f), /* 0 */ - FL2FXCONST_DMX(0.316f), /* 0 */ - FL2FXCONST_DMX(0.178f), /* 0 */ - FL2FXCONST_DMX(0.100f), /* 0 */ - FL2FXCONST_DMX(0.032f), /* 0 */ - FL2FXCONST_DMX(0.010f), /* 0 */ - FL2FXCONST_DMX(0.000f) /* 0 */ -}; - - - -#ifdef PCE_METADATA_ENABLE - /* MPEG matrix mixdown: - Set 1: L' = (1 + 2^-0.5 + A )^-1 * [L + C * 2^-0.5 + A * Ls]; - R' = (1 + 2^-0.5 + A )^-1 * [R + C * 2^-0.5 + A * Rs]; - - Set 2: L' = (1 + 2^-0.5 + 2A )^-1 * [L + C * 2^-0.5 - A * (Ls + Rs)]; - R' = (1 + 2^-0.5 + 2A )^-1 * [R + C * 2^-0.5 + A * (Ls + Rs)]; - - M = (3 + 2A)^-1 * [L + C + R + A*(Ls + Rs)]; - */ - static const FIXP_DMX mpegMixDownIdx2Coef[4] = - { - FL2FXCONST_DMX(0.70710678f), - FL2FXCONST_DMX(0.5f), - FL2FXCONST_DMX(0.35355339f), - FL2FXCONST_DMX(0.0f) - }; - - static const FIXP_SGL mpegMixDownIdx2PreFact[3][4] = - { { /* Set 1: */ - FL2FXCONST_DMX(0.4142135623730950f), - FL2FXCONST_DMX(0.4530818393219728f), - FL2FXCONST_DMX(0.4852813742385703f), - FL2FXCONST_DMX(0.5857864376269050f) - },{ /* Set 2: */ - FL2FXCONST_DMX(0.3203772410170407f), - FL2FXCONST_DMX(0.3693980625181293f), - FL2FXCONST_DMX(0.4142135623730950f), - FL2FXCONST_DMX(0.5857864376269050f) - },{ /* Mono DMX set: */ - FL2FXCONST_DMX(0.2265409196609864f), - FL2FXCONST_DMX(0.25f), - FL2FXCONST_DMX(0.2697521433898179f), - FL2FXCONST_DMX(0.3333333333333333f) } - }; -#endif /* PCE_METADATA_ENABLE */ - - -#define TYPE_NONE ( 0x0 ) -#define TYPE_DSE_DATA ( 0x1 ) -#define TYPE_PCE_DATA ( 0x2 ) - -typedef struct -{ - UINT typeFlags; - /* From DSE */ - UCHAR cLevIdx; - UCHAR sLevIdx; - UCHAR dmixIdxA; - UCHAR dmixIdxB; - UCHAR dmixIdxLfe; - UCHAR dmxGainIdx2; - UCHAR dmxGainIdx5; -#ifdef PCE_METADATA_ENABLE - /* From PCE */ - UCHAR matrixMixdownIdx; -#endif - /* Attributes: */ - SCHAR pseudoSurround; /*!< If set to 1 the signal is pseudo surround compatible. The value 0 tells - that it is not. If the value is -1 the information is not available. */ - UINT expiryCount; /*!< Counter to monitor the life time of a meta data set. */ - -} DMX_BS_META_DATA; - -/* Default metadata */ -static const DMX_BS_META_DATA dfltMetaData = { - 0, 2, 2, 2, 2, 15, 0, 0, -#ifdef PCE_METADATA_ENABLE - 0, -#endif - -1, 0 -}; - -/* Dynamic (user) params: - See the definition of PCMDMX_PARAM for details on the specific fields. */ -typedef struct -{ - UINT expiryFrame; /*!< Linked to DMX_BS_DATA_EXPIRY_FRAME */ - DUAL_CHANNEL_MODE dualChannelMode; /*!< Linked to DMX_DUAL_CHANNEL_MODE */ - PSEUDO_SURROUND_MODE pseudoSurrMode; /*!< Linked to DMX_PSEUDO_SURROUND_MODE */ - SHORT numOutChannelsMin; /*!< Linked to MIN_NUMBER_OF_OUTPUT_CHANNELS */ - SHORT numOutChannelsMax; /*!< Linked to MAX_NUMBER_OF_OUTPUT_CHANNELS */ - UCHAR frameDelay; /*!< Linked to DMX_BS_DATA_DELAY */ - -} PCM_DMX_USER_PARAMS; - -/* Modules main data structure: */ -struct PCM_DMX_INSTANCE -{ - /* Metadata */ - DMX_BS_META_DATA bsMetaData[PCM_DMX_MAX_DELAY_FRAMES+1]; - PCM_DMX_USER_PARAMS userParams; - - UCHAR applyProcessing; /*!< Flag to en-/disable modules processing. - The max channel limiting is done independently. */ -}; - -/* Memory allocation macro */ -C_ALLOC_MEM_STATIC(PcmDmxInstance, struct PCM_DMX_INSTANCE, 1) - - -/** Evaluate a given channel configuration and extract a packed channel mode. In addition the - * function generates a channel offset table for the mapping to the internal representation. - * This function is the inverse to the getChannelDescription() routine. - * @param [in] The total number of channels of the given configuration. - * @param [in] Array holding the corresponding channel types for each channel. - * @param [in] Array holding the corresponding channel type indices for each channel. - * @param [out] Array where the buffer offsets for each channel are stored into. - * @param [out] The generated packed channel mode that represents the given input configuration. - * @returns Returns an error code. - **/ -static -PCMDMX_ERROR getChannelMode ( - const INT numChannels, /* in */ - const AUDIO_CHANNEL_TYPE channelType[], /* in */ - const UCHAR channelIndices[], /* in */ - UCHAR offsetTable[PCM_DMX_MAX_CHANNELS], /* out */ - PCM_DMX_CHANNEL_MODE *chMode /* out */ - ) -{ - UCHAR chIdx[PCM_DMX_MAX_CHANNEL_GROUPS][PCM_DMX_MAX_CHANNELS_PER_GROUP]; - UCHAR numChInGrp[PCM_DMX_MAX_CHANNEL_GROUPS]; /* Total num of channels per group of the input config */ - UCHAR numChFree[PCM_DMX_MAX_CHANNEL_GROUPS]; /* Number of free slots per group in the internal repr. */ - UCHAR hardToPlace[PCM_DMX_MAX_CHANNELS]; /* List of channels not matching the internal repr. */ - UCHAR h2pSortIdx[PCM_DMX_MAX_CHANNELS]; - PCMDMX_ERROR err = PCMDMX_OK; - int ch, grpIdx; - int numChToPlace = 0; - - FDK_ASSERT(channelType != NULL); - FDK_ASSERT(channelIndices != NULL); - FDK_ASSERT(offsetTable != NULL); - FDK_ASSERT(chMode != NULL); - - /* For details see ISO/IEC 13818-7:2005(E), 8.5.3 Channel configuration */ - FDKmemclear(numChInGrp, PCM_DMX_MAX_CHANNEL_GROUPS*sizeof(UCHAR)); - FDKmemset(offsetTable, 255, PCM_DMX_MAX_CHANNELS*sizeof(UCHAR)); - FDKmemset(chIdx, 255, PCM_DMX_MAX_CHANNEL_GROUPS*PCM_DMX_MAX_CHANNELS_PER_GROUP*sizeof(UCHAR)); - FDKmemset(hardToPlace, 255, PCM_DMX_MAX_CHANNELS*sizeof(UCHAR)); - FDKmemset(h2pSortIdx, 255, PCM_DMX_MAX_CHANNELS*sizeof(UCHAR)); - /* Get the restrictions of the internal representation */ - FDKmemcpy(numChFree, maxChInGrp, PCM_DMX_MAX_CHANNEL_GROUPS*sizeof(UCHAR)); - - *chMode = CH_MODE_UNDEFINED; - - /* Categorize channels */ - for (ch = 0; ch < numChannels; ch += 1) { - UCHAR chGrpIdx = channelIndices[ch]; - int i = 0, j; - - switch (channelType[ch]) { - case ACT_FRONT_TOP: - chGrpIdx += numChInGrp[CH_GROUP_FRONT]; /* Append after normal plain */ - case ACT_FRONT: - grpIdx = CH_GROUP_FRONT; - break; -#if (PCM_DMX_MAX_CHANNEL_GROUPS > 1) - case ACT_SIDE_TOP: - chGrpIdx += numChInGrp[CH_GROUP_SIDE]; /* Append after normal plain */ - case ACT_SIDE: - grpIdx = CH_GROUP_SIDE; - break; - case ACT_BACK_TOP: - chGrpIdx += numChInGrp[CH_GROUP_REAR]; /* Append after normal plain */ - case ACT_BACK: - grpIdx = CH_GROUP_REAR; - break; - case ACT_LFE: - grpIdx = CH_GROUP_LFE; - break; -#endif - default: - /* Found a channel that can not be categorized! Most likely due to corrupt input signalling. - The rescue strategy is to append it to the front channels (=> ignore index). - This could cause strange behaviour so return an error to signal it. */ - err = PCMDMX_INVALID_MODE; - grpIdx = CH_GROUP_FRONT; - chGrpIdx = numChannels + numChToPlace; - numChToPlace += 1; - break; - } - - if (numChInGrp[grpIdx] < PCM_DMX_MAX_CHANNELS_PER_GROUP) { - /* Sort channels by index */ - while ( (i < numChInGrp[grpIdx]) && (chGrpIdx > channelIndices[chIdx[grpIdx][i]]) ) { - i += 1; - } - for (j = numChInGrp[grpIdx]; j > i; j -= 1) { - chIdx[grpIdx][j] = chIdx[grpIdx][j-1]; - } - chIdx[grpIdx][i] = ch; - numChInGrp[grpIdx] += 1; - } - } - -#if (PCM_DMX_MAX_CHANNEL_GROUPS > 1) - FDK_ASSERT( (numChInGrp[CH_GROUP_FRONT]+numChInGrp[CH_GROUP_SIDE] - +numChInGrp[CH_GROUP_REAR]+numChInGrp[CH_GROUP_LFE]) == numChannels); -#else - FDK_ASSERT( numChInGrp[CH_GROUP_FRONT] == numChannels ); -#endif - - /* Compose channel offset table: - * Map all channels to the internal representation. */ - numChToPlace = 0; - - /* Non-symmetric channels */ - if (numChInGrp[CH_GROUP_FRONT] & 0x1) { - /* Odd number of front channels -> we have a center channel. - In MPEG-4 the center has the index 0. */ - offsetTable[CENTER_FRONT_CHANNEL] = chIdx[CH_GROUP_FRONT][0]; - numChFree[CH_GROUP_FRONT] -= 1; - } - - for (grpIdx = 0; grpIdx < PCM_DMX_MAX_CHANNEL_GROUPS; grpIdx += 1) { - int chMapPos = 0; - ch = 0; /* Index of channel within the specific group */ - - switch (grpIdx) { - case CH_GROUP_FRONT: - chMapPos = LEFT_FRONT_CHANNEL; - ch = numChInGrp[grpIdx] & 0x1; - break; -#if (PCM_DMX_MAX_CHANNEL_GROUPS > 1) - case CH_GROUP_SIDE: - break; - case CH_GROUP_REAR: - chMapPos = LEFT_REAR_CHANNEL; - break; - case CH_GROUP_LFE: - chMapPos = LOW_FREQUENCY_CHANNEL; - break; -#endif - default: - FDK_ASSERT(0); - continue; - } - - /* Map all channels of the group */ - for ( ; ch < numChInGrp[grpIdx]; ch += 1) { - if (numChFree[grpIdx] > 0) { - offsetTable[chMapPos] = chIdx[grpIdx][ch]; - chMapPos += 1; - numChFree[grpIdx] -= 1; - } else { - /* Add to the list of hardship cases considering a MPEG-like sorting order: */ - int pos, sortIdx = grpIdx*PCM_DMX_MAX_CHANNELS_PER_GROUP + channelIndices[chIdx[grpIdx][ch]]; - for (pos = numChToPlace; pos > 0; pos -= 1) { - if (h2pSortIdx[pos-1] > sortIdx) { - hardToPlace[pos] = hardToPlace[pos-1]; - h2pSortIdx[pos] = h2pSortIdx[pos-1]; - } else { - /* Insert channel at the current index/position */ - break; - } - } - hardToPlace[pos] = chIdx[grpIdx][ch]; - h2pSortIdx[pos] = sortIdx; - numChToPlace += 1; - } - } - } - - { /* Assign the hardship cases */ - int chMapPos = 0; - int mappingHeat = 0; - for (ch = 0; ch < numChToPlace; ch+=1) { - int chAssigned = 0; - - /* Just assigning the channels to the next best slot can lead to undesired results (especially for x/x/1.x - configurations). Thus use the MPEG-like sorting index to find the best fitting slot for each channel. - If this is not possible the sorting index will be ignored (mappingHeat >= 2). */ - for ( ; chMapPos < PCM_DMX_MAX_CHANNELS; chMapPos+=1) { - if (offsetTable[chMapPos] == 255) { - int prvSortIdx = 0; - int nxtSortIdx = (CH_GROUP_LFE+1)*PCM_DMX_MAX_CHANNELS_PER_GROUP; - - if (mappingHeat < 2) { - if (chMapPos < LEFT_REAR_CHANNEL) { - /* Got front channel slot */ - prvSortIdx = CH_GROUP_FRONT*PCM_DMX_MAX_CHANNELS_PER_GROUP + chMapPos - CENTER_FRONT_CHANNEL; - nxtSortIdx = CH_GROUP_SIDE *PCM_DMX_MAX_CHANNELS_PER_GROUP; - } - else if (chMapPos < LOW_FREQUENCY_CHANNEL) { - /* Got back channel slot */ - prvSortIdx = CH_GROUP_REAR*PCM_DMX_MAX_CHANNELS_PER_GROUP + chMapPos - LEFT_REAR_CHANNEL; - nxtSortIdx = CH_GROUP_LFE *PCM_DMX_MAX_CHANNELS_PER_GROUP; - } - else if (chMapPos < LEFT_MULTIPRPS_CHANNEL) { - /* Got lfe channel slot */ - prvSortIdx = CH_GROUP_LFE *PCM_DMX_MAX_CHANNELS_PER_GROUP + chMapPos - LOW_FREQUENCY_CHANNEL; - nxtSortIdx = (CH_GROUP_LFE+1)*PCM_DMX_MAX_CHANNELS_PER_GROUP; - } - } - - /* Assign the channel only if its sort index is within the range */ - if ( (h2pSortIdx[ch] >= prvSortIdx) - && (h2pSortIdx[ch] < nxtSortIdx) ) { - offsetTable[chMapPos++] = hardToPlace[ch]; - chAssigned = 1; - break; - } - } - } - if (chAssigned == 0) { - chMapPos = 0; - ch -= 1; - mappingHeat += 1; - continue; - } - } - } - - /* Compose the channel mode */ - *chMode = (PCM_DMX_CHANNEL_MODE)( (numChInGrp[CH_GROUP_FRONT] & 0xF) -#if (PCM_DMX_MAX_CHANNEL_GROUPS > 1) - | (numChInGrp[CH_GROUP_SIDE] & 0xF) << 4 - | (numChInGrp[CH_GROUP_REAR] & 0xF) << 8 - | (numChInGrp[CH_GROUP_LFE] & 0xF) << 12 -#endif - ); - - return err; -} - - -/** Generate a channel offset table and complete channel description for a given (packed) channel mode. - * This function is the inverse to the getChannelMode() routine but does not support weird channel - * configurations. All channels have to be in the normal height layer and there must not be more - * channels in each group than given by maxChInGrp. - * @param [in] The packed channel mode of the configuration to be processed. - * @param [in] Array containing the channel mapping to be used (From MPEG PCE ordering to whatever is required). - * @param [out] Array where corresponding channel types for each channels are stored into. - * @param [out] Array where corresponding channel type indices for each output channel are stored into. - * @param [out] Array where the buffer offsets for each channel are stored into. - * @returns None. - **/ -static -void getChannelDescription ( - const PCM_DMX_CHANNEL_MODE chMode, /* in */ - const UCHAR channelMapping[][8], /* in */ - AUDIO_CHANNEL_TYPE channelType[], /* out */ - UCHAR channelIndices[], /* out */ - UCHAR offsetTable[PCM_DMX_MAX_CHANNELS] /* out */ - ) -{ - const UCHAR *pChannelMap; - int grpIdx, ch = 0, numChannels = 0; - UCHAR numChInGrp[PCM_DMX_MAX_CHANNEL_GROUPS]; - - FDK_ASSERT(channelType != NULL); - FDK_ASSERT(channelIndices != NULL); - FDK_ASSERT(channelMapping != NULL); - FDK_ASSERT(offsetTable != NULL); - - /* Init output arrays */ - FDKmemclear(channelType, PCM_DMX_MAX_IO_CHANNELS*sizeof(AUDIO_CHANNEL_TYPE)); - FDKmemclear(channelIndices, PCM_DMX_MAX_IO_CHANNELS*sizeof(UCHAR)); - FDKmemset(offsetTable, 255, PCM_DMX_MAX_CHANNELS*sizeof(UCHAR)); - - /* Extract the number of channels per group */ - numChInGrp[CH_GROUP_FRONT] = chMode & 0xF; -#if (PCM_DMX_MAX_CHANNEL_GROUPS > 1) - numChInGrp[CH_GROUP_SIDE] = (chMode >> 4) & 0xF; - numChInGrp[CH_GROUP_REAR] = (chMode >> 8) & 0xF; - numChInGrp[CH_GROUP_LFE] = (chMode >> 12) & 0xF; -#endif - - /* Summerize to get the total number of channels */ - for (grpIdx = 0; grpIdx < PCM_DMX_MAX_CHANNEL_GROUPS; grpIdx += 1) { - numChannels += numChInGrp[grpIdx]; - } - - /* Get the appropriate channel map */ - switch (chMode) { - case CH_MODE_1_0_0_0: - case CH_MODE_2_0_0_0: - case CH_MODE_3_0_0_0: - case CH_MODE_3_0_1_0: - case CH_MODE_3_0_2_0: - case CH_MODE_3_0_2_1: - pChannelMap = channelMapping[numChannels]; - break; - case CH_MODE_3_0_3_1: - pChannelMap = channelMapping[11]; - break; - case CH_MODE_3_0_4_1: - pChannelMap = channelMapping[12]; - break; - case CH_MODE_5_0_2_1: - pChannelMap = channelMapping[7]; - break; - default: - /* fallback */ - pChannelMap = channelMapping[0]; - break; - } - - /* Compose channel offset table */ - - /* Non-symmetric channels */ - if (numChInGrp[CH_GROUP_FRONT] & 0x1) { - /* Odd number of front channels -> we have a center channel. - In MPEG-4 the center has the index 0. */ - int mappedIdx = pChannelMap[ch]; - offsetTable[CENTER_FRONT_CHANNEL] = mappedIdx; - channelType[mappedIdx] = ACT_FRONT; - channelIndices[mappedIdx] = 0; - ch += 1; - } - - for (grpIdx = 0; grpIdx < PCM_DMX_MAX_CHANNEL_GROUPS; grpIdx += 1) { - AUDIO_CHANNEL_TYPE type = ACT_NONE; - int chMapPos = 0, maxChannels = 0; - int chIdx = 0; /* Index of channel within the specific group */ - - switch (grpIdx) { - case CH_GROUP_FRONT: - type = ACT_FRONT; - chMapPos = LEFT_FRONT_CHANNEL; - maxChannels = 3; - chIdx = numChInGrp[grpIdx] & 0x1; - break; -#if (PCM_DMX_MAX_CHANNEL_GROUPS > 1) - case CH_GROUP_SIDE: - /* Always map side channels to the multipurpose group. */ - type = ACT_SIDE; - chMapPos = LEFT_MULTIPRPS_CHANNEL; - break; - case CH_GROUP_REAR: - type = ACT_BACK; - chMapPos = LEFT_REAR_CHANNEL; - maxChannels = 2; - break; - case CH_GROUP_LFE: - type = ACT_LFE; - chMapPos = LOW_FREQUENCY_CHANNEL; - maxChannels = 1; - break; -#endif - default: - break; - } - - /* Map all channels in this group */ - for ( ; chIdx < numChInGrp[grpIdx]; chIdx += 1) { - int mappedIdx = pChannelMap[ch]; - if (chIdx == maxChannels) { - /* No space left in this channel group! - Use the multipurpose group instead: */ - chMapPos = LEFT_MULTIPRPS_CHANNEL; - } - offsetTable[chMapPos] = mappedIdx; - channelType[mappedIdx] = type; - channelIndices[mappedIdx] = chIdx; - chMapPos += 1; - ch += 1; - } - } -} - -/** Private helper function for downmix matrix manipulation that initializes - * one row in a given downmix matrix (corresponding to one output channel). - * @param [inout] Pointer to fixed-point parts of the downmix matrix. - * @param [inout] Pointer to scale factor matrix associated to the downmix factors. - * @param [in] Index of channel (row) to be initialized. - * @returns Nothing to return. - **/ -static -void dmxInitChannel( - FIXP_DMX mixFactors[PCM_DMX_MAX_CHANNELS][PCM_DMX_MAX_CHANNELS], - INT mixScales[PCM_DMX_MAX_CHANNELS][PCM_DMX_MAX_CHANNELS], - const unsigned int outCh - ) -{ - unsigned int inCh; - for (inCh=0; inCh < PCM_DMX_MAX_CHANNELS; inCh+=1) { - if (inCh == outCh) { - mixFactors[outCh][inCh] = FL2FXCONST_DMX(0.5f); - mixScales[outCh][inCh] = 1; - } else { - mixFactors[outCh][inCh] = FL2FXCONST_DMX(0.0f); - mixScales[outCh][inCh] = 0; - } - } -} - -/** Private helper function for downmix matrix manipulation that does a reset - * of one row in a given downmix matrix (corresponding to one output channel). - * @param [inout] Pointer to fixed-point parts of the downmix matrix. - * @param [inout] Pointer to scale factor matrix associated to the downmix factors. - * @param [in] Index of channel (row) to be cleared/reset. - * @returns Nothing to return. - **/ -static -void dmxClearChannel( - FIXP_DMX mixFactors[PCM_DMX_MAX_CHANNELS][PCM_DMX_MAX_CHANNELS], - INT mixScales[PCM_DMX_MAX_CHANNELS][PCM_DMX_MAX_CHANNELS], - const unsigned int outCh - ) -{ - FDKmemclear(&mixFactors[outCh], PCM_DMX_MAX_CHANNELS*sizeof(FIXP_DMX)); - FDKmemclear(&mixScales[outCh], PCM_DMX_MAX_CHANNELS*sizeof(INT)); -} - -/** Private helper function for downmix matrix manipulation that applies a source channel (row) - * scaled by a given mix factor to a destination channel (row) in a given downmix matrix. - * Existing mix factors of the destination channel (row) will get overwritten. - * @param [inout] Pointer to fixed-point parts of the downmix matrix. - * @param [inout] Pointer to scale factor matrix associated to the downmix factors. - * @param [in] Index of source channel (row). - * @param [in] Index of destination channel (row). - * @param [in] Fixed-point part of mix factor to be applied. - * @param [in] Scale factor of mix factor to be applied. - * @returns Nothing to return. - **/ -static -void dmxSetChannel( - FIXP_DMX mixFactors[PCM_DMX_MAX_CHANNELS][PCM_DMX_MAX_CHANNELS], - INT mixScales[PCM_DMX_MAX_CHANNELS][PCM_DMX_MAX_CHANNELS], - const unsigned int dstCh, - const unsigned int srcCh, - const FIXP_DMX factor, - const INT scale - ) -{ - int ch; - for (ch=0; ch < PCM_DMX_MAX_CHANNELS; ch+=1) { - if (mixFactors[srcCh][ch] != (FIXP_DMX)0) { - mixFactors[dstCh][ch] = FX_DBL2FX_DMX(fMult(mixFactors[srcCh][ch], factor)); - mixScales[dstCh][ch] = mixScales[srcCh][ch] + scale; - } - } -} - -/** Private helper function for downmix matrix manipulation that adds a source channel (row) - * scaled by a given mix factor to a destination channel (row) in a given downmix matrix. - * @param [inout] Pointer to fixed-point parts of the downmix matrix. - * @param [inout] Pointer to scale factor matrix associated to the downmix factors. - * @param [in] Index of source channel (row). - * @param [in] Index of destination channel (row). - * @param [in] Fixed-point part of mix factor to be applied. - * @param [in] Scale factor of mix factor to be applied. - * @returns Nothing to return. - **/ -static -void dmxAddChannel( - FIXP_DMX mixFactors[PCM_DMX_MAX_CHANNELS][PCM_DMX_MAX_CHANNELS], - INT mixScales[PCM_DMX_MAX_CHANNELS][PCM_DMX_MAX_CHANNELS], - const unsigned int dstCh, - const unsigned int srcCh, - const FIXP_DMX factor, - const INT scale - ) -{ - int ch; - for (ch=0; ch < PCM_DMX_MAX_CHANNELS; ch+=1) { - FIXP_DBL addFact = fMult(mixFactors[srcCh][ch], factor); - if (addFact != (FIXP_DMX)0) { - INT newScale = mixScales[srcCh][ch] + scale; - if (mixFactors[dstCh][ch] != (FIXP_DMX)0) { - if (newScale > mixScales[dstCh][ch]) { - mixFactors[dstCh][ch] >>= newScale - mixScales[dstCh][ch]; - } else { - addFact >>= mixScales[dstCh][ch] - newScale; - newScale = mixScales[dstCh][ch]; - } - } - mixFactors[dstCh][ch] += FX_DBL2FX_DMX(addFact); - mixScales[dstCh][ch] = newScale; - } - } -} - - -/** Private function that creates a downmix factor matrix depending on the input and output - * configuration, the user parameters as well as the given metadata. This function is the modules - * brain and hold all downmix algorithms. - * @param [in] Flag that indicates if inChMode holds a real (packed) channel mode or has been - converted to a MPEG-4 channel configuration index. - * @param [in] Dependent on the inModeIsCfg flag this field hands in a (packed) channel mode or - the corresponding MPEG-4 channel configuration index.of the input configuration. - * @param [in] The (packed) channel mode of the output configuration. - * @param [in] Pointer to structure holding all current user parameter. - * @param [in] Pointer to field holding all current meta data. - * @param [out] Pointer to fixed-point parts of the downmix matrix. Normalized to one scale factor. - * @param [out] The common scale factor of the downmix matrix. - * @returns An error code. - **/ -static -PCMDMX_ERROR getMixFactors ( - const UCHAR inModeIsCfg, - PCM_DMX_CHANNEL_MODE inChMode, - const PCM_DMX_CHANNEL_MODE outChMode, - const PCM_DMX_USER_PARAMS *pParams, - const DMX_BS_META_DATA *pMetaData, - FIXP_DMX mixFactors[PCM_DMX_MAX_CHANNELS][PCM_DMX_MAX_CHANNELS], - INT *pOutScale - ) -{ - PCMDMX_ERROR err = PCMDMX_OK; - INT mixScales[PCM_DMX_MAX_CHANNELS][PCM_DMX_MAX_CHANNELS]; - INT maxScale = 0; - int numInChannel, numOutChannel; - unsigned int outCh, inCh, inChCfg = 0; - unsigned int valid[PCM_DMX_MAX_CHANNELS] = { 0 }; - - FDK_ASSERT(pMetaData != NULL); - FDK_ASSERT(mixFactors != NULL); - /* Check on a supported output configuration */ - FDK_ASSERT( (outChMode == CH_MODE_1_0_0_0) - || (outChMode == CH_MODE_2_0_0_0) - || (outChMode == CH_MODE_3_0_2_1) ); - - if (inModeIsCfg) { - /* Workaround for the ambiguity of the internal channel modes. - Convert channel config to channel mode: */ - inChCfg = (unsigned int)inChMode; - switch (inChCfg) { - case 1: case 2: case 3: -#if (PCM_DMX_MAX_CHANNELS > 3) - case 4: case 5: case 6: -#endif - inChMode = outChModeTable[inChCfg]; - break; - case 11: - inChMode = CH_MODE_3_0_3_1; - break; - case 12: - inChMode = CH_MODE_3_0_4_1; - break; - case 7: case 14: - inChMode = CH_MODE_5_0_2_1; - break; - default: - FDK_ASSERT(0); - } - } - - /* Extract the total number of input channels */ - numInChannel = (inChMode&0xF) - + ((inChMode>> 4)&0xF) - + ((inChMode>> 8)&0xF) - + ((inChMode>>12)&0xF); - /* Extract the total number of output channels */ - numOutChannel = (outChMode&0xF) - + ((outChMode>> 4)&0xF) - + ((outChMode>> 8)&0xF) - + ((outChMode>>12)&0xF); - - /* MPEG ammendment 4 aka ETSI metadata and fallback mode: */ - - - /* Create identity DMX matrix: */ - for (outCh=0; outCh < PCM_DMX_MAX_CHANNELS; outCh+=1) { - dmxInitChannel( mixFactors, mixScales, outCh ); - } - if (((inChMode>>12)&0xF) == 0) { - /* Clear empty or wrongly mapped input channel */ - dmxClearChannel( mixFactors, mixScales, LOW_FREQUENCY_CHANNEL ); - } - - /* FIRST STAGE: */ - if (numInChannel > SIX_CHANNEL) - { /* Always use MPEG equations either with meta data or with default values. */ - FIXP_DMX dMixFactA, dMixFactB; - INT dMixScaleA, dMixScaleB; - int isValidCfg = TRUE; - - /* Get factors from meta data */ - dMixFactA = abMixLvlValueTab[pMetaData->dmixIdxA]; - dMixScaleA = (pMetaData->dmixIdxA==0) ? 1 : 0; - dMixFactB = abMixLvlValueTab[pMetaData->dmixIdxB]; - dMixScaleB = (pMetaData->dmixIdxB==0) ? 1 : 0; - - /* Check if input is in the list of supported configurations */ - switch (inChMode) { - case CH_MODE_3_0_3_1: /* chCfg 11 */ - /* 6.1ch: C' = C; L' = L; R' = R; LFE' = LFE; - Ls' = Ls*dmix_a_idx + Cs*dmix_b_idx; - Rs' = Rs*dmix_a_idx + Cs*dmix_b_idx; */ - dmxClearChannel( mixFactors, mixScales, RIGHT_MULTIPRPS_CHANNEL ); /* clear empty input channel */ - dmxSetChannel( mixFactors, mixScales, LEFT_REAR_CHANNEL, LEFT_REAR_CHANNEL, dMixFactA, dMixScaleA ); - dmxSetChannel( mixFactors, mixScales, LEFT_REAR_CHANNEL, LEFT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB ); - dmxSetChannel( mixFactors, mixScales, RIGHT_REAR_CHANNEL, RIGHT_REAR_CHANNEL, dMixFactA, dMixScaleA ); - dmxSetChannel( mixFactors, mixScales, RIGHT_REAR_CHANNEL, LEFT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB ); - break; - case CH_MODE_3_2_1_0: - case CH_MODE_3_2_1_1: /* chCfg 11 but with side channels */ - /* 6.1ch: C' = C; L' = L; R' = R; LFE' = LFE; - Ls' = Ls*dmix_a_idx + Cs*dmix_b_idx; - Rs' = Rs*dmix_a_idx + Cs*dmix_b_idx; */ - dmxClearChannel( mixFactors, mixScales, RIGHT_REAR_CHANNEL ); /* clear empty input channel */ - dmxSetChannel( mixFactors, mixScales, RIGHT_REAR_CHANNEL, LEFT_REAR_CHANNEL, dMixFactB, dMixScaleB ); - dmxSetChannel( mixFactors, mixScales, RIGHT_REAR_CHANNEL, RIGHT_MULTIPRPS_CHANNEL, dMixFactA, dMixScaleA ); - dmxSetChannel( mixFactors, mixScales, LEFT_REAR_CHANNEL, LEFT_REAR_CHANNEL, dMixFactB, dMixScaleB ); - dmxSetChannel( mixFactors, mixScales, LEFT_REAR_CHANNEL, LEFT_MULTIPRPS_CHANNEL, dMixFactA, dMixScaleA ); - isValidCfg = FALSE; - err = PCMDMX_INVALID_MODE; - break; - case CH_MODE_5_2_1_0: - case CH_MODE_5_0_1_0: - case CH_MODE_5_0_1_1: - /* Ls' = Cs*dmix_a_idx; - Rs' = Cs*dmix_a_idx; */ - dmxClearChannel( mixFactors, mixScales, RIGHT_REAR_CHANNEL ); /* clear empty input channel */ - dmxSetChannel( mixFactors, mixScales, RIGHT_REAR_CHANNEL, LEFT_REAR_CHANNEL, dMixFactA, dMixScaleA ); - dmxSetChannel( mixFactors, mixScales, LEFT_REAR_CHANNEL, LEFT_REAR_CHANNEL, dMixFactA, dMixScaleA ); - isValidCfg = FALSE; - err = PCMDMX_INVALID_MODE; - break; - case CH_MODE_3_0_4_1: /* chCfg 12 */ - /* 7.1ch Surround Back: C' = C; L' = L; R' = R; LFE' = LFE; - Ls' = Ls*dmix_a_idx + Lsr*dmix_b_idx; - Rs' = Rs*dmix_a_idx + Rsr*dmix_b_idx; */ - dmxSetChannel( mixFactors, mixScales, LEFT_REAR_CHANNEL, LEFT_REAR_CHANNEL, dMixFactA, dMixScaleA ); - dmxSetChannel( mixFactors, mixScales, LEFT_REAR_CHANNEL, LEFT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB ); - dmxSetChannel( mixFactors, mixScales, RIGHT_REAR_CHANNEL, RIGHT_REAR_CHANNEL, dMixFactA, dMixScaleA ); - dmxSetChannel( mixFactors, mixScales, RIGHT_REAR_CHANNEL, RIGHT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB ); - break; - case CH_MODE_5_0_2_1: /* chCfg 7 || 14 */ - if (inChCfg == 14) { - /* 7.1ch Front Height: C' = C; Ls' = Ls; Rs' = Rs; LFE' = LFE; - L' = L*dmix_a_idx + Lv*dmix_b_idx; - R' = R*dmix_a_idx + Rv*dmix_b_idx; */ - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_FRONT_CHANNEL, dMixFactA, dMixScaleA ); - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB ); - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, RIGHT_FRONT_CHANNEL, dMixFactA, dMixScaleA ); - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, RIGHT_MULTIPRPS_CHANNEL, dMixFactB, dMixScaleB ); - } else { - /* 7.1ch Front: Ls' = Ls; Rs' = Rs; LFE' = LFE; - C' = C + (Lc+Rc)*dmix_a_idx; - L' = L + Lc*dmix_b_idx; - R' = R + Rc*dmix_b_idx; - CAUTION: L+R are not at (MPEG) index 1+2. */ - dmxSetChannel( mixFactors, mixScales, CENTER_FRONT_CHANNEL, LEFT_FRONT_CHANNEL, dMixFactA, dMixScaleA ); - dmxSetChannel( mixFactors, mixScales, CENTER_FRONT_CHANNEL, RIGHT_FRONT_CHANNEL, dMixFactA, dMixScaleA ); - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_FRONT_CHANNEL, dMixFactB, dMixScaleB ); - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_MULTIPRPS_CHANNEL, FL2FXCONST_DMX(0.5f), 1 ); - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, RIGHT_FRONT_CHANNEL, dMixFactB, dMixScaleB ); - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, RIGHT_MULTIPRPS_CHANNEL, FL2FXCONST_DMX(0.5f), 1 ); - } - break; - default: - /* Nothing to do. Just use the identity matrix. */ - isValidCfg = FALSE; - err = PCMDMX_INVALID_MODE; - break; - } - - /* Add additional DMX gain */ - if ( (isValidCfg == TRUE) - && (pMetaData->dmxGainIdx5 != 0)) - { /* Apply DMX gain 5 */ - FIXP_DMX dmxGain; - INT dmxScale; - INT sign = (pMetaData->dmxGainIdx5 & 0x40) ? -1 : 1; - INT val = pMetaData->dmxGainIdx5 & 0x3F; - - /* 10^(dmx_gain_5/80) */ - dmxGain = FX_DBL2FX_DMX( fLdPow( - FL2FXCONST_DBL(0.830482023721841f), 2, /* log2(10) */ - (FIXP_DBL)(sign*val*(LONG)FL2FXCONST_DBL(0.0125f)), 0, - &dmxScale ) - ); - /* Currently only positive scale factors supported! */ - if (dmxScale < 0) { - dmxGain >>= -dmxScale; - dmxScale = 0; - } - - dmxSetChannel( mixFactors, mixScales, CENTER_FRONT_CHANNEL, CENTER_FRONT_CHANNEL, dmxGain, dmxScale ); - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_FRONT_CHANNEL, dmxGain, dmxScale ); - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, RIGHT_FRONT_CHANNEL, dmxGain, dmxScale ); - dmxSetChannel( mixFactors, mixScales, LEFT_REAR_CHANNEL, LEFT_REAR_CHANNEL, dmxGain, dmxScale ); - dmxSetChannel( mixFactors, mixScales, RIGHT_REAR_CHANNEL, RIGHT_REAR_CHANNEL, dmxGain, dmxScale ); - dmxSetChannel( mixFactors, mixScales, LOW_FREQUENCY_CHANNEL, LOW_FREQUENCY_CHANNEL, dmxGain, dmxScale ); - } - - /* Mark the output channels */ - valid[CENTER_FRONT_CHANNEL] = 1; - valid[LEFT_FRONT_CHANNEL] = 1; - valid[RIGHT_FRONT_CHANNEL] = 1; - valid[LEFT_REAR_CHANNEL] = 1; - valid[RIGHT_REAR_CHANNEL] = 1; - valid[LOW_FREQUENCY_CHANNEL] = 1; - - /* Update channel mode for the next stage */ - inChMode = CH_MODE_3_0_2_1; - } - - /* SECOND STAGE: */ - if (numOutChannel <= TWO_CHANNEL) { - /* Create DMX matrix according to input configuration */ - switch (inChMode) { - case CH_MODE_2_0_0_0: /* chCfg 2 */ - /* Apply the dual channel mode. */ - switch (pParams->dualChannelMode) { - case CH1_MODE: /* L' = 0.707 * Ch1; - R' = 0.707 * Ch1; */ - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0 ); - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, LEFT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0 ); - break; - case CH2_MODE: /* L' = 0.707 * Ch2; - R' = 0.707 * Ch2; */ - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, RIGHT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0 ); - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, RIGHT_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0 ); - break; - case MIXED_MODE: /* L' = 0.5*Ch1 + 0.5*Ch2; - R' = 0.5*Ch1 + 0.5*Ch2; */ - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_FRONT_CHANNEL, FL2FXCONST_DMX(0.5f), 0 ); - dmxAddChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, RIGHT_FRONT_CHANNEL, FL2FXCONST_DMX(0.5f), 0 ); - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, LEFT_FRONT_CHANNEL, FL2FXCONST_DMX(0.5f), 0 ); - dmxAddChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, RIGHT_FRONT_CHANNEL, FL2FXCONST_DMX(0.5f), 0 ); - break; - default: - case STEREO_MODE: - /* Nothing to do */ - break; - } - break; - case CH_MODE_2_0_1_0: - /* L' = L + 0.707*S; - R' = R + 0.707*S; */ - dmxAddChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_REAR_CHANNEL, FL2FXCONST_DMX(0.707f), 0 ); - dmxAddChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, LEFT_REAR_CHANNEL, FL2FXCONST_DMX(0.707f), 0 ); - break; - case CH_MODE_3_0_0_0: /* chCfg 3 */ - /* L' = L + 0.707*C; - R' = R + 0.707*C; */ - dmxAddChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, CENTER_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0 ); - dmxAddChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, CENTER_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0 ); - break; - case CH_MODE_3_0_1_0: /* chCfg 4 */ - /* L' = L + 0.707*C + 0.707*S; - R' = R + 0.707*C + 0.707*S; */ - dmxAddChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, CENTER_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0 ); - dmxAddChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_REAR_CHANNEL, FL2FXCONST_DMX(0.707f), 0 ); - dmxAddChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, CENTER_FRONT_CHANNEL, FL2FXCONST_DMX(0.707f), 0 ); - dmxAddChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, LEFT_REAR_CHANNEL, FL2FXCONST_DMX(0.707f), 0 ); - break; - case CH_MODE_3_0_2_0: /* chCfg 5 */ - case CH_MODE_3_0_2_1: /* chCfg 6 */ - /* MPEG + ITU + DLB - But because the default downmix equations and coefficients are equal we stick to MPEG. */ - if ( (pMetaData->typeFlags & TYPE_DSE_DATA) - || !(pMetaData->typeFlags & TYPE_PCE_DATA) ) - { - FIXP_DMX cMixLvl, sMixLvl, lMixLvl; - INT cMixScale, sMixScale, lMixScale; - - /* Get factors from meta data */ - cMixLvl = abMixLvlValueTab[pMetaData->cLevIdx]; - cMixScale = (pMetaData->cLevIdx==0) ? 1 : 0; - sMixLvl = abMixLvlValueTab[pMetaData->sLevIdx]; - sMixScale = (pMetaData->sLevIdx==0) ? 1 : 0; - lMixLvl = lfeMixLvlValueTab[pMetaData->dmixIdxLfe]; - if (pMetaData->dmixIdxLfe <= 1) { - lMixScale = 2; - } else if (pMetaData->dmixIdxLfe <= 5) { - lMixScale = 1; - } else { - lMixScale = 0; - } - /* Setup the DMX matrix */ - if ( (pParams->pseudoSurrMode == FORCE_PS_DMX) - || ((pParams->pseudoSurrMode == AUTO_PS_DMX) && (pMetaData->pseudoSurround==1))) - { /* L' = L + C*clev - (Ls+Rs)*slev + LFE*lflev; - R' = R + C*clev + (Ls+Rs)*slev + LFE*lflev; */ - dmxAddChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, CENTER_FRONT_CHANNEL, cMixLvl, cMixScale ); - dmxAddChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_REAR_CHANNEL, -sMixLvl, sMixScale ); - dmxAddChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, RIGHT_REAR_CHANNEL, -sMixLvl, sMixScale ); - dmxAddChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LOW_FREQUENCY_CHANNEL, lMixLvl, lMixScale ); - dmxAddChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, CENTER_FRONT_CHANNEL, cMixLvl, cMixScale ); - dmxAddChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, LEFT_REAR_CHANNEL, sMixLvl, sMixScale ); - dmxAddChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, RIGHT_REAR_CHANNEL, sMixLvl, sMixScale ); - dmxAddChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, LOW_FREQUENCY_CHANNEL, lMixLvl, lMixScale ); - } - else - { /* L' = L + C*clev + Ls*slev + LFE*llev; - R' = R + C*clev + Rs*slev + LFE*llev; */ - dmxAddChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, CENTER_FRONT_CHANNEL, cMixLvl, cMixScale ); - dmxAddChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_REAR_CHANNEL, sMixLvl, sMixScale ); - dmxAddChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LOW_FREQUENCY_CHANNEL, lMixLvl, lMixScale ); - dmxAddChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, CENTER_FRONT_CHANNEL, cMixLvl, cMixScale ); - dmxAddChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, RIGHT_REAR_CHANNEL, sMixLvl, sMixScale ); - dmxAddChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, LOW_FREQUENCY_CHANNEL, lMixLvl, lMixScale ); - } - - /* Add additional DMX gain */ - if ( pMetaData->dmxGainIdx2 != 0 ) - { /* Apply DMX gain 2 */ - FIXP_DMX dmxGain; - INT dmxScale; - INT sign = (pMetaData->dmxGainIdx2 & 0x40) ? -1 : 1; - INT val = pMetaData->dmxGainIdx2 & 0x3F; - - /* 10^(dmx_gain_2/80) */ - dmxGain = FX_DBL2FX_DMX( fLdPow( - FL2FXCONST_DBL(0.830482023721841f), 2, /* log2(10) */ - (FIXP_DBL)(sign*val*(LONG)FL2FXCONST_DBL(0.0125f)), 0, - &dmxScale ) - ); - /* Currently only positive scale factors supported! */ - if (dmxScale < 0) { - dmxGain >>= -dmxScale; - dmxScale = 0; - } - - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_FRONT_CHANNEL, dmxGain, dmxScale ); - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, RIGHT_FRONT_CHANNEL, dmxGain, dmxScale ); - } - } -#ifdef PCE_METADATA_ENABLE - else { - FIXP_DMX flev, clev, slevLL, slevLR, slevRL, slevRR; - FIXP_DMX mtrxMixDwnCoef = mpegMixDownIdx2Coef[pMetaData->matrixMixdownIdx]; - - if ( (pParams->pseudoSurrMode == FORCE_PS_DMX) - || ((pParams->pseudoSurrMode == AUTO_PS_DMX) && (pMetaData->pseudoSurround==1))) - { /* 3/2 input: L' = (1.707+2*A)^-1 * [L+0.707*C-A*Ls-A*Rs]; - R' = (1.707+2*A)^-1 * [R+0.707*C+A*Ls+A*Rs]; */ - flev = mpegMixDownIdx2PreFact[1][pMetaData->matrixMixdownIdx]; - slevRR = slevRL = FX_DBL2FX_DMX(fMult(flev, mtrxMixDwnCoef)); - slevLL = slevLR = -slevRL; - } - else { - /* 3/2 input: L' = (1.707+A)^-1 * [L+0.707*C+A*Ls]; - R' = (1.707+A)^-1 * [R+0.707*C+A*Rs]; */ - flev = mpegMixDownIdx2PreFact[0][pMetaData->matrixMixdownIdx]; - slevRR = slevLL = FX_DBL2FX_DMX(fMult(flev, mtrxMixDwnCoef)); - slevLR = slevRL = (FIXP_SGL)0; - } - /* common factor */ - clev = FX_DBL2FX_DMX(fMult(flev, mpegMixDownIdx2Coef[0] /* 0.707 */)); - - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_FRONT_CHANNEL, flev, 0 ); - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, CENTER_FRONT_CHANNEL, clev, 0 ); - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, LEFT_REAR_CHANNEL, slevLL, 0 ); - dmxSetChannel( mixFactors, mixScales, LEFT_FRONT_CHANNEL, RIGHT_REAR_CHANNEL, slevLR, 0 ); - - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, RIGHT_FRONT_CHANNEL, flev, 0 ); - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, CENTER_FRONT_CHANNEL, clev, 0 ); - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, LEFT_REAR_CHANNEL, slevRL, 0 ); - dmxSetChannel( mixFactors, mixScales, RIGHT_FRONT_CHANNEL, RIGHT_REAR_CHANNEL, slevRR, 0 ); - } -#endif /* PCE_METADATA_ENABLE */ - break; - default: - /* This configuration does not fit to any known downmix equation! */ - err = PCMDMX_INVALID_MODE; - break; - } - /* Mark the output channels */ - FDKmemclear(valid, PCM_DMX_MAX_CHANNELS*sizeof(unsigned int)); - valid[LEFT_FRONT_CHANNEL] = 1; - valid[RIGHT_FRONT_CHANNEL] = 1; - /* Update channel mode for the next stage */ - inChMode = CH_MODE_2_0_0_0; - } - - if (numOutChannel == ONE_CHANNEL) { - FIXP_DMX monoMixLevel; - INT monoMixScale; - -#ifdef PCE_METADATA_ENABLE - if ( (pMetaData->typeFlags & TYPE_PCE_DATA) - && !(pMetaData->typeFlags & TYPE_DSE_DATA) ) - { /* C' = (3+2*A)^-1 * [C+L+R+A*Ls+A+Rs]; */ - monoMixLevel = mpegMixDownIdx2PreFact[2][pMetaData->matrixMixdownIdx]; - monoMixScale = 0; - - dmxClearChannel( mixFactors, mixScales, CENTER_FRONT_CHANNEL ); - mixFactors[CENTER_FRONT_CHANNEL][CENTER_FRONT_CHANNEL] = monoMixLevel; - mixFactors[CENTER_FRONT_CHANNEL][LEFT_FRONT_CHANNEL] = monoMixLevel; - mixFactors[CENTER_FRONT_CHANNEL][RIGHT_FRONT_CHANNEL] = monoMixLevel; - monoMixLevel = FX_DBL2FX_DMX(fMult(monoMixLevel, mpegMixDownIdx2Coef[pMetaData->matrixMixdownIdx])); - mixFactors[CENTER_FRONT_CHANNEL][LEFT_REAR_CHANNEL] = monoMixLevel; - mixFactors[CENTER_FRONT_CHANNEL][RIGHT_REAR_CHANNEL] = monoMixLevel; - } - else -#endif - { /* C' = L + R; [default] */ - monoMixLevel = FL2FXCONST_DMX(0.5f); - monoMixScale = 1; - dmxClearChannel( mixFactors, mixScales, CENTER_FRONT_CHANNEL ); /* C is not in the mix */ - dmxSetChannel( mixFactors, mixScales, CENTER_FRONT_CHANNEL, LEFT_FRONT_CHANNEL, monoMixLevel, monoMixScale ); - dmxAddChannel( mixFactors, mixScales, CENTER_FRONT_CHANNEL, RIGHT_FRONT_CHANNEL, monoMixLevel, monoMixScale ); - } - - /* Mark the output channel */ - FDKmemclear(valid, PCM_DMX_MAX_CHANNELS*sizeof(unsigned int)); - valid[CENTER_FRONT_CHANNEL] = 1; - } - -#define MAX_SEARCH_START_VAL ( -7 ) - - { - LONG chSum[PCM_DMX_MAX_CHANNELS]; - INT chSumMax = MAX_SEARCH_START_VAL; - - /* Determine the current maximum scale factor */ - for (outCh=0; outCh < PCM_DMX_MAX_CHANNELS; outCh+=1) { - if (valid[outCh]!=0) { - for (inCh=0; inCh < PCM_DMX_MAX_CHANNELS; inCh+=1) { - if (mixScales[outCh][inCh] > maxScale) - { /* Store the new maximum */ - maxScale = mixScales[outCh][inCh]; - } - } - } - } - - /* Individualy analyse output chanal levels */ - for (outCh=0; outCh < PCM_DMX_MAX_CHANNELS; outCh+=1) { - chSum[outCh] = MAX_SEARCH_START_VAL; - if (valid[outCh]!=0) { - int ovrflwProtScale = 0; - - /* Accumulate all factors for each output channel */ - chSum[outCh] = 0; - for (inCh=0; inCh < PCM_DMX_MAX_CHANNELS; inCh+=1) { - SHORT addFact = FX_DMX2SHRT(mixFactors[outCh][inCh]); - if ( mixScales[outCh][inCh] <= maxScale ) { - addFact >>= maxScale - mixScales[outCh][inCh]; - } else { - addFact <<= mixScales[outCh][inCh] - maxScale; - } - chSum[outCh] += addFact; - } - if (chSum[outCh] > (LONG)MAXVAL_SGL) { - while (chSum[outCh] > (LONG)MAXVAL_SGL) { - ovrflwProtScale += 1; - chSum[outCh] >>= 1; - } - } else if (chSum[outCh] > 0) { - while ((chSum[outCh]<<1) <= (LONG)MAXVAL_SGL) { - ovrflwProtScale -= 1; - chSum[outCh] <<= 1; - } - } - /* Store the differential scaling in the same array */ - chSum[outCh] = ovrflwProtScale; - } - } - - for (outCh=0; outCh < PCM_DMX_MAX_CHANNELS; outCh+=1) { - if ( (valid[outCh] != 0) - && (chSum[outCh] > chSumMax) ) - { /* Store the new maximum */ - chSumMax = chSum[outCh]; - } - } - maxScale = FDKmax(maxScale+chSumMax, 0); - - /* Normalize all factors */ - for (outCh=0; outCh < PCM_DMX_MAX_CHANNELS; outCh+=1) { - if (valid[outCh]!=0) { - for (inCh=0; inCh < PCM_DMX_MAX_CHANNELS; inCh+=1) { - if (mixFactors[outCh][inCh] != (FIXP_DMX)0) { - if ( mixScales[outCh][inCh] <= maxScale ) { - mixFactors[outCh][inCh] >>= maxScale - mixScales[outCh][inCh]; - } else { - mixFactors[outCh][inCh] <<= mixScales[outCh][inCh] - maxScale; - } - mixScales[outCh][inCh] = maxScale; - } - } - } - } - } - - - /* return the scale factor */ - *pOutScale = maxScale; - - return (err); -} - - -/** Open and initialize an instance of the PCM downmix module - * @param [out] Pointer to a buffer receiving the handle of the new instance. - * @returns Returns an error code. - **/ -PCMDMX_ERROR pcmDmx_Open ( - HANDLE_PCM_DOWNMIX *pSelf - ) -{ - HANDLE_PCM_DOWNMIX self; - - if (pSelf == NULL) { - return (PCMDMX_INVALID_HANDLE); - } - - *pSelf = NULL; - - self = (HANDLE_PCM_DOWNMIX) GetPcmDmxInstance( 0 ); - if (self == NULL) { - return (PCMDMX_OUT_OF_MEMORY); - } - - /* Reset the full instance */ - pcmDmx_Reset( self, PCMDMX_RESET_FULL ); - - *pSelf = self; - - return (PCMDMX_OK); -} - - -/** Reset all static values like e.g. mixdown coefficients. - * @param [in] Handle of PCM downmix module instance. - * @param [in] Flags telling which parts of the module shall be reset. - * @returns Returns an error code. - **/ -PCMDMX_ERROR pcmDmx_Reset ( - HANDLE_PCM_DOWNMIX self, - UINT flags - ) -{ - if (self == NULL) { return (PCMDMX_INVALID_HANDLE); } - - if (flags & PCMDMX_RESET_PARAMS) { - PCM_DMX_USER_PARAMS *pParams = &self->userParams; - - pParams->dualChannelMode = STEREO_MODE; - pParams->pseudoSurrMode = NEVER_DO_PS_DMX; - pParams->numOutChannelsMax = PCM_DMX_DFLT_MAX_OUT_CHANNELS; - pParams->numOutChannelsMin = PCM_DMX_DFLT_MIN_OUT_CHANNELS; - pParams->frameDelay = 0; - pParams->expiryFrame = PCM_DMX_DFLT_EXPIRY_FRAME; - - self->applyProcessing = 0; - } - - if (flags & PCMDMX_RESET_BS_DATA) { - int slot; - /* Init all slots with a default set */ - for (slot = 0; slot <= PCM_DMX_MAX_DELAY_FRAMES; slot += 1) { - FDKmemcpy(&self->bsMetaData[slot], &dfltMetaData, sizeof(DMX_BS_META_DATA)); - } - } - - return (PCMDMX_OK); -} - - -/** Set one parameter for one instance of the PCM downmix module. - * @param [in] Handle of PCM downmix module instance. - * @param [in] Parameter to be set. - * @param [in] Parameter value. - * @returns Returns an error code. - **/ -PCMDMX_ERROR pcmDmx_SetParam ( - HANDLE_PCM_DOWNMIX self, - const PCMDMX_PARAM param, - const INT value - ) -{ - switch (param) - { - case DMX_BS_DATA_EXPIRY_FRAME: - if (self == NULL) - return (PCMDMX_INVALID_HANDLE); - self->userParams.expiryFrame = (value > 0) ? (UINT)value : 0; - break; - - case DMX_BS_DATA_DELAY: - if ( (value > PCM_DMX_MAX_DELAY_FRAMES) - || (value < 0) ) { - return (PCMDMX_UNABLE_TO_SET_PARAM); - } - if (self == NULL) { - return (PCMDMX_INVALID_HANDLE); - } - self->userParams.frameDelay = (UCHAR)value; - break; - - case MIN_NUMBER_OF_OUTPUT_CHANNELS: - switch (value) { /* supported output channels */ - case -1: case 0: case ONE_CHANNEL: case TWO_CHANNEL: -#if (PCM_DMX_MAX_OUT_CHANNELS >= 6) - case SIX_CHANNEL: -#endif -#if (PCM_DMX_MAX_OUT_CHANNELS >= 8) - case EIGHT_CHANNEL: -#endif - break; - default: - return (PCMDMX_UNABLE_TO_SET_PARAM); - } - if (self == NULL) - return (PCMDMX_INVALID_HANDLE); - /* Store the new value */ - self->userParams.numOutChannelsMin = (value > 0) ? value : -1; - if ( (value > 0) - && (self->userParams.numOutChannelsMax > 0) - && (value > self->userParams.numOutChannelsMax) ) - { /* MIN > MAX would be an invalid state. Thus set MAX = MIN in this case. */ - self->userParams.numOutChannelsMax = self->userParams.numOutChannelsMin; - } - break; - - case MAX_NUMBER_OF_OUTPUT_CHANNELS: - switch (value) { /* supported output channels */ - case -1: case 0: case ONE_CHANNEL: case TWO_CHANNEL: -#if (PCM_DMX_MAX_OUT_CHANNELS >= 6) - case SIX_CHANNEL: -#endif -#if (PCM_DMX_MAX_OUT_CHANNELS >= 8) - case EIGHT_CHANNEL: -#endif - break; - default: - return (PCMDMX_UNABLE_TO_SET_PARAM); - } - if (self == NULL) - return (PCMDMX_INVALID_HANDLE); - /* Store the new value */ - self->userParams.numOutChannelsMax = (value > 0) ? value : -1; - if ( (value > 0) - && (value < self->userParams.numOutChannelsMin) ) - { /* MAX < MIN would be an invalid state. Thus set MIN = MAX in this case. */ - self->userParams.numOutChannelsMin = self->userParams.numOutChannelsMax; - } - break; - - case DMX_DUAL_CHANNEL_MODE: - switch ((DUAL_CHANNEL_MODE)value) { - case STEREO_MODE: - case CH1_MODE: - case CH2_MODE: - case MIXED_MODE: - break; - default: - return (PCMDMX_UNABLE_TO_SET_PARAM); - } - if (self == NULL) - return (PCMDMX_INVALID_HANDLE); - self->userParams.dualChannelMode = (DUAL_CHANNEL_MODE)value; - self->applyProcessing = 1; /* Force processing */ - break; - - case DMX_PSEUDO_SURROUND_MODE: - switch ((PSEUDO_SURROUND_MODE)value) { - case NEVER_DO_PS_DMX: - case AUTO_PS_DMX: - case FORCE_PS_DMX: - break; - default: - return (PCMDMX_UNABLE_TO_SET_PARAM); - } - if (self == NULL) - return (PCMDMX_INVALID_HANDLE); - self->userParams.pseudoSurrMode = (PSEUDO_SURROUND_MODE)value; - break; - - default: - return (PCMDMX_UNKNOWN_PARAM); - } - - return (PCMDMX_OK); -} - -/** Get one parameter value of one PCM downmix module instance. - * @param [in] Handle of PCM downmix module instance. - * @param [in] Parameter to be set. - * @param [out] Pointer to buffer receiving the parameter value. - * @returns Returns an error code. - **/ -PCMDMX_ERROR pcmDmx_GetParam ( - HANDLE_PCM_DOWNMIX self, - const PCMDMX_PARAM param, - INT * const pValue - ) -{ - PCM_DMX_USER_PARAMS *pUsrParams; - - if ( (self == NULL) - || (pValue == NULL) ) { - return (PCMDMX_INVALID_HANDLE); - } - pUsrParams = &self->userParams; - - switch (param) - { - case DMX_BS_DATA_EXPIRY_FRAME: - *pValue = (INT)pUsrParams->expiryFrame; - break; - case DMX_BS_DATA_DELAY: - *pValue = (INT)pUsrParams->frameDelay; - break; - case MIN_NUMBER_OF_OUTPUT_CHANNELS: - *pValue = (INT)pUsrParams->numOutChannelsMin; - break; - case MAX_NUMBER_OF_OUTPUT_CHANNELS: - *pValue = (INT)pUsrParams->numOutChannelsMax; - break; - case DMX_DUAL_CHANNEL_MODE: - *pValue = (INT)pUsrParams->dualChannelMode; - break; - case DMX_PSEUDO_SURROUND_MODE: - *pValue = (INT)pUsrParams->pseudoSurrMode; - break; - default: - return (PCMDMX_UNKNOWN_PARAM); - } - - return (PCMDMX_OK); -} - - -#ifdef DSE_METADATA_ENABLE - -#define MAX_DSE_ANC_BYTES ( 16 ) /* 15 bytes */ -#define ANC_DATA_SYNC_BYTE ( 0xBC ) /* ancillary data sync byte. */ - -/* - * Read DMX meta-data from a data stream element. - */ -PCMDMX_ERROR pcmDmx_Parse ( - HANDLE_PCM_DOWNMIX self, - HANDLE_FDK_BITSTREAM hBs, - UINT ancDataBits, - int isMpeg2 - ) -{ - PCMDMX_ERROR errorStatus = PCMDMX_OK; - DMX_BS_META_DATA *pBsMetaData = &self->bsMetaData[0]; - - int skip4Dmx = 0, skip4Ext = 0; - int dmxLvlAvail = 0, extDataAvail = 0; - int foundNewData = 0; - UINT minAncBits = ((isMpeg2) ? 5 : 3)*8; - - if ( (self == NULL) - || (hBs == NULL) ) { return (PCMDMX_INVALID_HANDLE); } - - ancDataBits = FDKgetValidBits(hBs); - - /* sanity checks */ - if ( (ancDataBits < minAncBits) - || (ancDataBits > FDKgetValidBits(hBs)) ) { - return (PCMDMX_CORRUPT_ANC_DATA); - } - - pBsMetaData = &self->bsMetaData[0]; - - if (isMpeg2) { - /* skip DVD ancillary data */ - FDKpushFor(hBs, 16); - } - - /* check sync word */ - if (FDKreadBits(hBs,8) != ANC_DATA_SYNC_BYTE) { - return (PCMDMX_CORRUPT_ANC_DATA); - } - - /* skip MPEG audio type and Dolby surround mode */ - FDKpushFor(hBs, 4); - - if (isMpeg2) { - /* int numAncBytes = */ FDKreadBits(hBs, 4); - /* advanced dynamic range control */ - if (FDKreadBit(hBs)) skip4Dmx += 24; - /* dialog normalization */ - if (FDKreadBit(hBs)) skip4Dmx += 8; - /* reproduction_level */ - if (FDKreadBit(hBs)) skip4Dmx += 8; - } else { - FDKpushFor(hBs, 2); /* drc presentation mode */ - pBsMetaData->pseudoSurround = FDKreadBit(hBs); - FDKpushFor(hBs, 4); /* reserved bits */ - } - - /* downmixing levels MPEGx status */ - dmxLvlAvail = FDKreadBit(hBs); - - if (isMpeg2) { - /* scale factor CRC status */ - if (FDKreadBit(hBs)) skip4Ext += 16; - } else { - /* ancillary data extension status */ - extDataAvail = FDKreadBit(hBs); - } - - /* audio coding and compression status */ - if (FDKreadBit(hBs)) skip4Ext += 16; - /* coarse grain timecode status */ - if (FDKreadBit(hBs)) skip4Ext += 16; - /* fine grain timecode status */ - if (FDKreadBit(hBs)) skip4Ext += 16; - - /* skip the useless data to get to the DMX levels */ - FDKpushFor(hBs, skip4Dmx); - - /* downmix_levels_MPEGX */ - if (dmxLvlAvail) - { - if (FDKreadBit(hBs)) { /* center_mix_level_on */ - pBsMetaData->cLevIdx = FDKreadBits(hBs, 3); - foundNewData = 1; - } else { - FDKreadBits(hBs, 3); - } - if (FDKreadBit(hBs)) { /* surround_mix_level_on */ - pBsMetaData->sLevIdx = FDKreadBits(hBs, 3); - foundNewData = 1; - } else { - FDKreadBits(hBs, 3); - } - } - - /* skip the useless data to get to the ancillary data extension */ - FDKpushFor(hBs, skip4Ext); - - /* anc data extension (MPEG-4 only) */ - if (extDataAvail) { - int extDmxLvlSt, extDmxGainSt, extDmxLfeSt; - - FDKreadBit(hBs); /* reserved bit */ - extDmxLvlSt = FDKreadBit(hBs); - extDmxGainSt = FDKreadBit(hBs); - extDmxLfeSt = FDKreadBit(hBs); - FDKreadBits(hBs, 4); /* reserved bits */ - - if (extDmxLvlSt) { - pBsMetaData->dmixIdxA = FDKreadBits(hBs, 3); - pBsMetaData->dmixIdxB = FDKreadBits(hBs, 3); - FDKreadBits(hBs, 2); /* reserved bits */ - foundNewData = 1; - } - if (extDmxGainSt) { - pBsMetaData->dmxGainIdx5 = FDKreadBits(hBs, 7); - FDKreadBit(hBs); /* reserved bit */ - pBsMetaData->dmxGainIdx2 = FDKreadBits(hBs, 7); - FDKreadBit(hBs); /* reserved bit */ - foundNewData = 1; - } - if (extDmxLfeSt) { - pBsMetaData->dmixIdxLfe = FDKreadBits(hBs, 4); - FDKreadBits(hBs, 4); /* reserved bits */ - foundNewData = 1; - } - } - - /* final sanity check on the amount of read data */ - if ((INT)FDKgetValidBits(hBs) < 0) { - errorStatus = PCMDMX_CORRUPT_ANC_DATA; - } - - if ( (errorStatus == PCMDMX_OK) - && (foundNewData == 1) ) { - /* announce new data */ - pBsMetaData->typeFlags |= TYPE_DSE_DATA; - /* reset expiry counter */ - pBsMetaData->expiryCount = 0; - } - - return (errorStatus); -} - -/* - * Read DMX meta-data from a data stream element. - */ -PCMDMX_ERROR pcmDmx_ReadDvbAncData ( - HANDLE_PCM_DOWNMIX self, - UCHAR *pAncDataBuf, - UINT ancDataBytes, - int isMpeg2 - ) -{ - FDK_BITSTREAM bs; - HANDLE_FDK_BITSTREAM hBs = &bs; - PCMDMX_ERROR errorStatus = PCMDMX_OK; - - if (self == NULL) { return (PCMDMX_INVALID_HANDLE); } - - /* sanity checks */ - if ( (pAncDataBuf == NULL) - || (ancDataBytes == 0) ) { - return (PCMDMX_CORRUPT_ANC_DATA); - } - - FDKinitBitStream (hBs, pAncDataBuf, MAX_DSE_ANC_BYTES, ancDataBytes*8, BS_READER); - - errorStatus = pcmDmx_Parse ( - self, - hBs, - ancDataBytes*8, - isMpeg2 ); - - return (errorStatus); -} -#endif /* DSE_METADATA_ENABLE */ - -#ifdef PCE_METADATA_ENABLE -/** Set the matrix mixdown information extracted from the PCE of an AAC bitstream. - * Note: Call only if matrix_mixdown_idx_present is true. - * @param [in] Handle of PCM downmix module instance. - * @param [in] The 2 bit matrix mixdown index extracted from PCE. - * @param [in] The pseudo surround enable flag extracted from PCE. - * @returns Returns an error code. - **/ -PCMDMX_ERROR pcmDmx_SetMatrixMixdownFromPce ( - HANDLE_PCM_DOWNMIX self, - int matrixMixdownPresent, - int matrixMixdownIdx, - int pseudoSurroundEnable - ) -{ - DMX_BS_META_DATA *pBsMetaData = &self->bsMetaData[0]; - - if (self == NULL) { - return (PCMDMX_INVALID_HANDLE); - } - - if (matrixMixdownPresent) { - pBsMetaData->pseudoSurround = pseudoSurroundEnable; - pBsMetaData->matrixMixdownIdx = matrixMixdownIdx & 0x03; - pBsMetaData->typeFlags |= TYPE_PCE_DATA; - /* Reset expiry counter */ - pBsMetaData->expiryCount = 0; - } - - return (PCMDMX_OK); -} -#endif /* PCE_METADATA_ENABLE */ - - -/** Apply down or up mixing. - * @param [in] Handle of PCM downmix module instance. - * @param [inout] Pointer to buffer that hold the time domain signal. - * @param [in] Pointer where the amount of output samples is returned into. - * @param [inout] Pointer where the amount of output channels is returned into. - * @param [in] Flag which indicates if output time data are writtern interleaved or as subsequent blocks. - * @param [inout] Array where the corresponding channel type for each output audio channel is stored into. - * @param [inout] Array where the corresponding channel type index for each output audio channel is stored into. - * @param [in] Array containing the out channel mapping to be used (From MPEG PCE ordering to whatever is required). - * @param [out] Pointer on a field receiving the scale factor that has to be applied on all samples afterwards. - * If the handed pointer is NULL scaling is done internally. - * @returns Returns an error code. - **/ -PCMDMX_ERROR pcmDmx_ApplyFrame ( - HANDLE_PCM_DOWNMIX self, - INT_PCM *pPcmBuf, - UINT frameSize, - INT *nChannels, - int fInterleaved, - AUDIO_CHANNEL_TYPE channelType[], - UCHAR channelIndices[], - const UCHAR channelMapping[][8], - INT *pDmxOutScale - ) -{ - PCM_DMX_USER_PARAMS *pParam = NULL; - PCMDMX_ERROR errorStatus = PCMDMX_OK; - DUAL_CHANNEL_MODE dualChannelMode; - PCM_DMX_CHANNEL_MODE inChMode; - PCM_DMX_CHANNEL_MODE outChMode; - INT devNull; /* Just a dummy to avoid a lot of branches in the code */ - int numOutChannels, numInChannels; - int inStride, outStride, offset; - int dmxMaxScale, dmxScale; - int ch, slot; - UCHAR inOffsetTable[PCM_DMX_MAX_CHANNELS]; - - DMX_BS_META_DATA bsMetaData; - - if ( (self == NULL) - || (nChannels == NULL) - || (channelType == NULL) - || (channelIndices == NULL) - || (channelMapping == NULL) ) { - return (PCMDMX_INVALID_HANDLE); - } - - /* Init the output scaling */ - dmxScale = 0; - if (pDmxOutScale != NULL) { - /* Avoid final scaling internally and hand it to the outside world. */ - *pDmxOutScale = 0; - dmxMaxScale = PCMDMX_MAX_HEADROOM; - } else { - /* Apply the scaling internally. */ - pDmxOutScale = &devNull; /* redirect to temporal stack memory */ - dmxMaxScale = 0; - } - - pParam = &self->userParams; - numInChannels = *nChannels; - - /* Perform some input sanity checks */ - if (pPcmBuf == NULL) { return (PCMDMX_INVALID_ARGUMENT); } - if (frameSize == 0) { return (PCMDMX_INVALID_ARGUMENT); } - if ( (numInChannels == 0) - || (numInChannels > PCM_DMX_MAX_IN_CHANNELS) ) - { return (PCMDMX_INVALID_ARGUMENT); } - - /* Check on misconfiguration */ - FDK_ASSERT( (pParam->numOutChannelsMax <= 0) \ - || (pParam->numOutChannelsMax >= pParam->numOutChannelsMin)); - - /* Determine if the module has to do processing */ - if ( (self->applyProcessing == 0) - && ((pParam->numOutChannelsMax <= 0) - || (pParam->numOutChannelsMax >= numInChannels)) - && (pParam->numOutChannelsMin <= numInChannels) ) { - /* Nothing to do */ - return (errorStatus); - } - - /* Determine the number of output channels */ - if ( (pParam->numOutChannelsMax > 0) - && (numInChannels > pParam->numOutChannelsMax) ) { - numOutChannels = pParam->numOutChannelsMax; - } - else if (numInChannels < pParam->numOutChannelsMin) { - numOutChannels = pParam->numOutChannelsMin; - } - else { - numOutChannels = numInChannels; - } - - dualChannelMode = pParam->dualChannelMode; - - /* Analyse input channel configuration and get channel offset - * table that can be accessed with the fixed channel labels. */ - errorStatus = getChannelMode( - numInChannels, - channelType, - channelIndices, - inOffsetTable, - &inChMode - ); - if ( PCMDMX_IS_FATAL_ERROR(errorStatus) - || (inChMode == CH_MODE_UNDEFINED) ) { - /* We don't need to restore because the channel - configuration has not been changed. Just exit. */ - return (PCMDMX_INVALID_CH_CONFIG); - } - - /* Set input stride and offset */ - if (fInterleaved) { - inStride = numInChannels; - offset = 1; /* Channel specific offset factor */ - } else { - inStride = 1; - offset = frameSize; /* Channel specific offset factor */ - } - - /* Reset downmix meta data if necessary */ - if ( (pParam->expiryFrame > 0) - && (++self->bsMetaData[0].expiryCount > pParam->expiryFrame) ) - { /* The metadata read from bitstream is too old. */ - PCMDMX_ERROR err = pcmDmx_Reset(self, PCMDMX_RESET_BS_DATA); - FDK_ASSERT(err == PCMDMX_OK); - } - FDKmemcpy(&bsMetaData, &self->bsMetaData[pParam->frameDelay], sizeof(DMX_BS_META_DATA)); - /* Maintain delay line */ - for (slot = pParam->frameDelay; slot > 0; slot -= 1) { - FDKmemcpy(&self->bsMetaData[slot], &self->bsMetaData[slot-1], sizeof(DMX_BS_META_DATA)); - } - - /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ -#ifdef PCM_DOWNMIX_ENABLE - if ( numInChannels > numOutChannels ) - { /* Apply downmix */ - INT_PCM *pInPcm[PCM_DMX_MAX_IN_CHANNELS] = { NULL }; - INT_PCM *pOutPcm[PCM_DMX_MAX_OUT_CHANNELS] = { NULL }; - FIXP_DMX mixFactors[PCM_DMX_MAX_CHANNELS][PCM_DMX_MAX_CHANNELS]; - UCHAR outOffsetTable[PCM_DMX_MAX_CHANNELS]; - UINT sample; - int chCfg = 0; - int bypScale = 0; - -#if (PCM_DMX_MAX_IN_CHANNELS >= 7) - if (numInChannels > SIX_CHANNEL) { - AUDIO_CHANNEL_TYPE multiPurposeChType[2]; - - /* Get the type of the multipurpose channels */ - multiPurposeChType[0] = channelType[inOffsetTable[LEFT_MULTIPRPS_CHANNEL]]; - multiPurposeChType[1] = channelType[inOffsetTable[RIGHT_MULTIPRPS_CHANNEL]]; - - /* Check if the input configuration is one defined in the standard. */ - switch (inChMode) { - case CH_MODE_5_0_2_1: /* chCfg 7 || 14 */ - /* Further analyse the input config to distinguish the two CH_MODE_5_0_2_1 configs. */ - if ( (multiPurposeChType[0] == ACT_FRONT_TOP) - && (multiPurposeChType[1] == ACT_FRONT_TOP) ) { - chCfg = 14; - } else { - chCfg = 7; - } - break; - case CH_MODE_3_0_3_1: /* chCfg 11 */ - chCfg = 11; - break; - case CH_MODE_3_0_4_1: /* chCfg 12 */ - chCfg = 12; - break; - default: - chCfg = 0; /* Not a known config */ - break; - } - } -#endif - - /* Set this stages output stride and channel mode: */ - outStride = (fInterleaved) ? numOutChannels : 1; - outChMode = outChModeTable[numOutChannels]; - - /* Get channel description and channel mapping for the desired output configuration. */ - getChannelDescription( - outChMode, - channelMapping, - channelType, - channelIndices, - outOffsetTable - ); - /* Now there is no way back because we modified the channel configuration! */ - - /* Create the DMX matrix */ - errorStatus = getMixFactors ( - (chCfg>0) ? 1 : 0, - (chCfg>0) ? (PCM_DMX_CHANNEL_MODE)chCfg : inChMode, - outChMode, - pParam, - &bsMetaData, - mixFactors, - &dmxScale - ); - /* No fatal errors can occur here. The function is designed to always return a valid matrix. - The error code is used to signal configurations and matrices that are not conform to any standard. */ - - /* Determine the final scaling */ - bypScale = FDKmin(dmxMaxScale, dmxScale); - *pDmxOutScale += bypScale; - dmxScale -= bypScale; - - { /* Set channel pointer for input. Remove empty cols. */ - int inCh, outCh, map[PCM_DMX_MAX_CHANNELS]; - ch = 0; - for (inCh=0; inCh < PCM_DMX_MAX_CHANNELS; inCh+=1) { - if (inOffsetTable[inCh] != 255) { - pInPcm[ch] = &pPcmBuf[inOffsetTable[inCh]*offset]; - map[ch++] = inCh; - } - } - if (ch != numInChannels) { -#ifndef __linux__ - ALOGE("b/23876444"); -#endif - return PCMDMX_INVALID_ARGUMENT; - } - - /* Remove unused cols from factor matrix */ - for (inCh=0; inCh < numInChannels; inCh+=1) { - if (inCh != map[inCh]) { - int outCh; - for (outCh=0; outCh < PCM_DMX_MAX_CHANNELS; outCh+=1) { - mixFactors[outCh][inCh] = mixFactors[outCh][map[inCh]]; - } - } - } - - /* Set channel pointer for output. Remove empty cols. */ - ch = 0; - for (outCh=0; outCh < PCM_DMX_MAX_CHANNELS; outCh+=1) { - if (outOffsetTable[outCh] != 255) { - pOutPcm[ch] = &pPcmBuf[outOffsetTable[outCh]*offset]; - map[ch++] = outCh; - } - } - FDK_ASSERT(ch == numOutChannels); - - /* Remove unused rows from factor matrix */ - for (outCh=0; outCh < numOutChannels; outCh+=1) { - if (outCh != map[outCh]) { - FDKmemcpy(&mixFactors[outCh], &mixFactors[map[outCh]], PCM_DMX_MAX_CHANNELS*sizeof(FIXP_DMX)); - } - } - } - - /* Sample processing loop */ - for (sample = 0; sample < frameSize; sample++) - { - FIXP_PCM tIn[PCM_DMX_MAX_IN_CHANNELS]; - FIXP_DBL tOut[PCM_DMX_MAX_OUT_CHANNELS] = { (FIXP_DBL)0 }; - int inCh, outCh; - - /* Preload all input samples */ - for (inCh=0; inCh < numInChannels; inCh+=1) { - tIn[inCh] = (FIXP_PCM)*pInPcm[inCh]; - pInPcm[inCh] += inStride; - } - /* Apply downmix coefficients to input samples and accumulate for output */ - for (outCh=0; outCh < numOutChannels; outCh+=1) { - for (inCh=0; inCh < numInChannels; inCh+=1) { - tOut[outCh] += fMult(tIn[inCh], mixFactors[outCh][inCh]); - } - /* Write sample */ -#if (SAMPLE_BITS == DFRACT_BITS) - *pOutPcm[outCh] = (INT_PCM)SATURATE_LEFT_SHIFT(tOut[outCh], dmxScale, SAMPLE_BITS); -#else - *pOutPcm[outCh] = (INT_PCM)SATURATE_RIGHT_SHIFT(tOut[outCh], DFRACT_BITS-SAMPLE_BITS-dmxScale, SAMPLE_BITS); -#endif - pOutPcm[outCh] += outStride; - } - } - - /* Update the number of output channels */ - *nChannels = numOutChannels; - - } /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ - else -#endif /* PCM_DOWNMIX_ENABLE */ -#ifdef PCM_CHANNEL_EXTENSION_ENABLE - if ( numInChannels < numOutChannels ) - { /* Apply rudimentary upmix */ - /* Set up channel pointer */ - UINT sample; - UCHAR outOffsetTable[PCM_DMX_MAX_CHANNELS]; - - /* FIRST STAGE - Create a stereo/dual channel signal */ - if (numInChannels == ONE_CHANNEL) - { - INT_PCM *pInPcm[PCM_DMX_MAX_CHANNELS]; - INT_PCM *pOutLF, *pOutRF; - - /* Set this stages output stride and channel mode: */ - outStride = (fInterleaved) ? TWO_CHANNEL : 1; - outChMode = outChModeTable[TWO_CHANNEL]; - - /* Get channel description and channel mapping for this - * stages number of output channels (always STEREO). */ - getChannelDescription( - outChMode, - channelMapping, - channelType, - channelIndices, - outOffsetTable - ); - /* Now there is no way back because we modified the channel configuration! */ - - /* Set input channel pointer. The first channel is always at index 0. */ - pInPcm[CENTER_FRONT_CHANNEL] = &pPcmBuf[(frameSize-1)*inStride]; /* Considering input mapping could lead to a invalid pointer - here if the channel is not declared to be a front channel. */ - - /* Set output channel pointer (for this stage). */ - pOutLF = &pPcmBuf[outOffsetTable[LEFT_FRONT_CHANNEL]*offset+(frameSize-1)*outStride]; - pOutRF = &pPcmBuf[outOffsetTable[RIGHT_FRONT_CHANNEL]*offset+(frameSize-1)*outStride]; - - /* 1/0 input: */ - for (sample = 0; sample < frameSize; sample++) { - /* L' = C; R' = C; */ - *pOutLF = *pOutRF = *pInPcm[CENTER_FRONT_CHANNEL]; - - pInPcm[CENTER_FRONT_CHANNEL] -= inStride; - pOutLF -= outStride; pOutRF -= outStride; - } - - /* Prepare for next stage: */ - inStride = outStride; - inChMode = outChMode; - FDKmemcpy(inOffsetTable, outOffsetTable, PCM_DMX_MAX_CHANNELS*sizeof(UCHAR)); - } - -#if (PCM_DMX_MAX_OUT_CHANNELS > 2) - /* SECOND STAGE - Extend with zero channels to achieved the desired number of output channels. */ - if (numOutChannels > TWO_CHANNEL) - { - INT_PCM *pIn[PCM_DMX_MAX_CHANNELS] = { NULL }; - INT_PCM *pOut[PCM_DMX_MAX_CHANNELS] = { NULL }; - AUDIO_CHANNEL_TYPE inChTypes[PCM_DMX_MAX_CHANNELS]; - UCHAR inChIndices[PCM_DMX_MAX_CHANNELS]; - UCHAR numChPerGrp[2][PCM_DMX_MAX_CHANNEL_GROUPS]; - int nContentCh = 0; /* Number of channels with content */ - int nEmptyCh = 0; /* Number of channels with content */ - int ch, chGrp, isCompatible = 1; - - /* Do not change the signalling which is the channel types and indices. - Just reorder and add channels. So first save the input signalling. */ - FDKmemcpy(inChTypes, channelType, PCM_DMX_MAX_CHANNELS*sizeof(AUDIO_CHANNEL_TYPE)); - FDKmemcpy(inChIndices, channelIndices, PCM_DMX_MAX_CHANNELS*sizeof(UCHAR)); - - /* Set this stages output stride and channel mode: */ - outStride = (fInterleaved) ? numOutChannels : 1; - outChMode = outChModeTable[numOutChannels]; - - /* Check if input channel config can be easily mapped to the desired output config. */ - for (chGrp = 0; chGrp < PCM_DMX_MAX_CHANNEL_GROUPS; chGrp += 1) { - numChPerGrp[IN][chGrp] = (inChMode >> (chGrp*4)) & 0xF; - numChPerGrp[OUT][chGrp] = (outChMode >> (chGrp*4)) & 0xF; - - if (numChPerGrp[IN][chGrp] > numChPerGrp[OUT][chGrp]) { - isCompatible = 0; - break; - } - } - - if ( isCompatible ) { - /* Get new channel description and channel - * mapping for the desired output channel mode. */ - getChannelDescription( - outChMode, - channelMapping, - channelType, - channelIndices, - outOffsetTable - ); - /* If the input config has a back center channel but the output - config has not, copy it to left and right (if available). */ - if ( (numChPerGrp[IN][CH_GROUP_REAR]%2) - && !(numChPerGrp[OUT][CH_GROUP_REAR]%2) ) { - if (numChPerGrp[IN][CH_GROUP_REAR] == 1) { - inOffsetTable[RIGHT_REAR_CHANNEL] = inOffsetTable[LEFT_REAR_CHANNEL]; - } else if (numChPerGrp[IN][CH_GROUP_REAR] == 3) { - inOffsetTable[RIGHT_MULTIPRPS_CHANNEL] = inOffsetTable[LEFT_MULTIPRPS_CHANNEL]; - } - } - } - else { - /* Just copy and extend the original config */ - FDKmemcpy(outOffsetTable, inOffsetTable, PCM_DMX_MAX_CHANNELS*sizeof(UCHAR)); - } - - /* Set I/O channel pointer. - Note: The following assignment algorithm clears the channel offset tables. - Thus they can not be used afterwards. */ - for (ch = 0; ch < PCM_DMX_MAX_CHANNELS; ch+=1) { - if ( (outOffsetTable[ch] < 255) - && (inOffsetTable[ch] < 255) ) - { /* Set I/O pointer: */ - pIn[nContentCh] = &pPcmBuf[inOffsetTable[ch]*offset+(frameSize-1)*inStride]; - pOut[nContentCh] = &pPcmBuf[outOffsetTable[ch]*offset+(frameSize-1)*outStride]; - /* Update signalling */ - channelType[outOffsetTable[ch]] = inChTypes[inOffsetTable[ch]]; - channelIndices[outOffsetTable[ch]] = inChIndices[inOffsetTable[ch]]; - inOffsetTable[ch] = 255; - outOffsetTable[ch] = 255; - nContentCh += 1; - } - } - if ( isCompatible ) { - /* Assign the remaining input channels. - This is just a safety appliance. We should never need it. */ - for (ch = 0; ch < PCM_DMX_MAX_CHANNELS; ch+=1) { - if (inOffsetTable[ch] < 255) { - int outCh; - for (outCh = 0 ; outCh < PCM_DMX_MAX_CHANNELS; outCh += 1) { - if (outOffsetTable[outCh] < 255) { - break; - } - } - /* Set I/O pointer: */ - pIn[nContentCh] = &pPcmBuf[inOffsetTable[ch]*offset+(frameSize-1)*inStride]; - pOut[nContentCh] = &pPcmBuf[outOffsetTable[outCh]*offset+(frameSize-1)*outStride]; - /* Update signalling */ - channelType[outOffsetTable[outCh]] = inChTypes[inOffsetTable[ch]]; - channelIndices[outOffsetTable[outCh]] = inChIndices[inOffsetTable[ch]]; - inOffsetTable[ch] = 255; - outOffsetTable[outCh] = 255; - nContentCh += 1; - } - } - /* Set the remaining output channel pointer */ - for (ch = 0; ch < PCM_DMX_MAX_CHANNELS; ch+=1) { - if (outOffsetTable[ch] < 255) { - pOut[nContentCh+nEmptyCh] = &pPcmBuf[outOffsetTable[ch]*offset+(frameSize-1)*outStride]; - /* Expand output signalling */ - channelType[outOffsetTable[ch]] = ACT_NONE; - channelIndices[outOffsetTable[ch]] = nEmptyCh; - outOffsetTable[ch] = 255; - nEmptyCh += 1; - } - } - } - else { - /* Set the remaining output channel pointer */ - for (ch = nContentCh; ch < numOutChannels; ch+=1) { - pOut[ch] = &pPcmBuf[ch*offset+(frameSize-1)*outStride]; - /* Expand output signalling */ - channelType[ch] = ACT_NONE; - channelIndices[ch] = nEmptyCh; - nEmptyCh += 1; - } - } - - /* First copy the channels that have signal */ - for (sample = 0; sample < frameSize; sample+=1) { - INT_PCM tIn[PCM_DMX_MAX_CHANNELS]; - /* Read all channel samples */ - for (ch = 0; ch < nContentCh; ch+=1) { - tIn[ch] = *pIn[ch]; - pIn[ch] -= inStride; - } - /* Write all channel samples */ - for (ch = 0; ch < nContentCh; ch+=1) { - *pOut[ch] = tIn[ch]; - pOut[ch] -= outStride; - } - } - - /* Clear all the other channels */ - for (sample = 0; sample < frameSize; sample++) { - for (ch = nContentCh; ch < numOutChannels; ch+=1) { - *pOut[ch] = (INT_PCM)0; - pOut[ch] -= outStride; - } - } - } -#endif /* if (PCM_DMX_MAX_OUT_CHANNELS > 2) */ - - /* update the number of output channels */ - *nChannels = numOutChannels; - } /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ - else -#endif /* PCM_CHANNEL_EXTENSION_ENABLE */ - if ( numInChannels == numOutChannels ) - { - /* Don't need to change the channel description here */ - - switch (numInChannels) - { - case 2: - { /* Set up channel pointer */ - INT_PCM *pInPcm[PCM_DMX_MAX_CHANNELS]; - INT_PCM *pOutL, *pOutR; - FIXP_DMX flev; - - UINT sample; - int inStride, outStride, offset; - - if (fInterleaved) { - inStride = numInChannels; - outStride = 2; /* fixed !!! (below stereo is donwmixed to mono if required */ - offset = 1; /* Channel specific offset factor */ - } else { - inStride = 1; - outStride = 1; - offset = frameSize; /* Channel specific offset factor */ - } - - /* Set input channel pointer */ - pInPcm[LEFT_FRONT_CHANNEL] = &pPcmBuf[inOffsetTable[LEFT_FRONT_CHANNEL]*offset]; - pInPcm[RIGHT_FRONT_CHANNEL] = &pPcmBuf[inOffsetTable[RIGHT_FRONT_CHANNEL]*offset]; - - /* Set output channel pointer (same as input) */ - pOutL = pInPcm[LEFT_FRONT_CHANNEL]; - pOutR = pInPcm[RIGHT_FRONT_CHANNEL]; - - /* Set downmix levels: */ - flev = FL2FXCONST_DMX(0.70710678f); - /* 2/0 input: */ - switch (dualChannelMode) - { - case CH1_MODE: /* L' = 0.707 * Ch1; R' = 0.707 * Ch1 */ - for (sample = 0; sample < frameSize; sample++) { - *pOutL = *pOutR = - (INT_PCM)SATURATE_RIGHT_SHIFT(fMult((FIXP_PCM)*pInPcm[LEFT_FRONT_CHANNEL], flev), DFRACT_BITS-SAMPLE_BITS, SAMPLE_BITS); - - pInPcm[LEFT_FRONT_CHANNEL] += inStride; - pOutL += outStride; pOutR += outStride; - } - break; - case CH2_MODE: /* L' = 0.707 * Ch2; R' = 0.707 * Ch2 */ - for (sample = 0; sample < frameSize; sample++) { - *pOutL = *pOutR = - (INT_PCM)SATURATE_RIGHT_SHIFT(fMult((FIXP_PCM)*pInPcm[RIGHT_FRONT_CHANNEL], flev), DFRACT_BITS-SAMPLE_BITS, SAMPLE_BITS); - - pInPcm[RIGHT_FRONT_CHANNEL] += inStride; - pOutL += outStride; pOutR += outStride; - } - break; - case MIXED_MODE: /* L' = 0.5*Ch1 + 0.5*Ch2; R' = 0.5*Ch1 + 0.5*Ch2 */ - for (sample = 0; sample < frameSize; sample++) { - *pOutL = *pOutR = (*pInPcm[LEFT_FRONT_CHANNEL] >> 1) + (*pInPcm[RIGHT_FRONT_CHANNEL] >> 1); - - pInPcm[LEFT_FRONT_CHANNEL] += inStride; pInPcm[RIGHT_FRONT_CHANNEL] += inStride; - pOutL += outStride; pOutR += outStride; - } - break; - default: - case STEREO_MODE: - /* nothing to do */ - break; - } - } - break; - - default: - /* nothing to do */ - break; - } - } - - return (errorStatus); -} - - -/** Close an instance of the PCM downmix module. - * @param [inout] Pointer to a buffer containing the handle of the instance. - * @returns Returns an error code. - **/ -PCMDMX_ERROR pcmDmx_Close ( - HANDLE_PCM_DOWNMIX *pSelf - ) -{ - if (pSelf == NULL) { - return (PCMDMX_INVALID_HANDLE); - } - - FreePcmDmxInstance( pSelf ); - *pSelf = NULL; - - return (PCMDMX_OK); -} - - -/** Get library info for this module. - * @param [out] Pointer to an allocated LIB_INFO structure. - * @returns Returns an error code. - */ -PCMDMX_ERROR pcmDmx_GetLibInfo( LIB_INFO *info ) -{ - int i; - - if (info == NULL) { - return PCMDMX_INVALID_ARGUMENT; - } - - /* Search for next free tab */ - for (i = 0; i < FDK_MODULE_LAST; i++) { - if (info[i].module_id == FDK_NONE) break; - } - if (i == FDK_MODULE_LAST) { - return PCMDMX_UNKNOWN; - } - - /* Add the library info */ - info[i].module_id = FDK_PCMDMX; - info[i].version = LIB_VERSION(PCMDMX_LIB_VL0, PCMDMX_LIB_VL1, PCMDMX_LIB_VL2); - LIB_VERSION_STRING(info+i); - info[i].build_date = PCMDMX_LIB_BUILD_DATE; - info[i].build_time = PCMDMX_LIB_BUILD_TIME; - info[i].title = PCMDMX_LIB_TITLE; - - /* Set flags */ - info[i].flags = 0 -#ifdef PCM_DOWNMIX_ENABLE - | CAPF_DMX_BLIND /* At least blind downmixing is possible */ - #ifdef PCE_METADATA_ENABLE - | CAPF_DMX_PCE /* Guided downmix with data from MPEG-2/4 Program Config Elements (PCE). */ - #ifdef ARIB_MIXDOWN_ENABLE - | CAPF_DMX_ARIB /* PCE guided downmix with slightly different equations and levels. */ - #endif - #endif /* PCE_METADATA_ENABLE */ - #ifdef DSE_METADATA_ENABLE - | CAPF_DMX_DVB /* Guided downmix with data from DVB ancillary data fields. */ - #endif -#endif /* PCM_DOWNMIX_ENABLE */ -#ifdef PCM_CHANNEL_EXTENSION_ENABLE - | CAPF_DMX_CH_EXP /* Simple upmixing by dublicating channels or adding zero channels. */ -#endif - ; - - /* Add lib info for FDK tools (if not yet done). */ - FDK_toolsGetLibInfo(info); - - return PCMDMX_OK; -} - - - diff --git a/libPCMutils/src/version.h b/libPCMutils/src/version.h new file mode 100644 index 0000000..fa31af1 --- /dev/null +++ b/libPCMutils/src/version.h @@ -0,0 +1,119 @@ +/* ----------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten +Forschung e.V. All rights reserved. + + 1. INTRODUCTION +The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software +that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding +scheme for digital audio. This FDK AAC Codec software is intended to be used on +a wide variety of Android devices. + +AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient +general perceptual audio codecs. AAC-ELD is considered the best-performing +full-bandwidth communications codec by independent studies and is widely +deployed. AAC has been standardized by ISO and IEC as part of the MPEG +specifications. + +Patent licenses for necessary patent claims for the FDK AAC Codec (including +those of Fraunhofer) may be obtained through Via Licensing +(www.vialicensing.com) or through the respective patent owners individually for +the purpose of encoding or decoding bit streams in products that are compliant +with the ISO/IEC MPEG audio standards. Please note that most manufacturers of +Android devices already license these patent claims through Via Licensing or +directly from the patent owners, and therefore FDK AAC Codec software may +already be covered under those patent licenses when it is used for those +licensed purposes only. + +Commercially-licensed AAC software libraries, including floating-point versions +with enhanced sound quality, are also available from Fraunhofer. Users are +encouraged to check the Fraunhofer website for additional applications +information and documentation. + +2. COPYRIGHT LICENSE + +Redistribution and use in source and binary forms, with or without modification, +are permitted without payment of copyright license fees provided that you +satisfy the following conditions: + +You must retain the complete text of this software license in redistributions of +the FDK AAC Codec or your modifications thereto in source code form. + +You must retain the complete text of this software license in the documentation +and/or other materials provided with redistributions of the FDK AAC Codec or +your modifications thereto in binary form. You must make available free of +charge copies of the complete source code of the FDK AAC Codec and your +modifications thereto to recipients of copies in binary form. + +The name of Fraunhofer may not be used to endorse or promote products derived +from this library without prior written permission. + +You may not charge copyright license fees for anyone to use, copy or distribute +the FDK AAC Codec software or your modifications thereto. + +Your modified versions of the FDK AAC Codec must carry prominent notices stating +that you changed the software and the date of any change. For modified versions +of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" +must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK +AAC Codec Library for Android." + +3. NO PATENT LICENSE + +NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without +limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. +Fraunhofer provides no warranty of patent non-infringement with respect to this +software. + +You may use this FDK AAC Codec software or modifications thereto only for +purposes that are authorized by appropriate patent licenses. + +4. DISCLAIMER + +This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright +holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, +including but not limited to the implied warranties of merchantability and +fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR +CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, +or consequential damages, including but not limited to procurement of substitute +goods or services; loss of use, data, or profits, or business interruption, +however caused and on any theory of liability, whether in contract, strict +liability, or tort (including negligence), arising in any way out of the use of +this software, even if advised of the possibility of such damage. + +5. CONTACT INFORMATION + +Fraunhofer Institute for Integrated Circuits IIS +Attention: Audio and Multimedia Departments - FDK AAC LL +Am Wolfsmantel 33 +91058 Erlangen, Germany + +www.iis.fraunhofer.de/amm +amm-info@iis.fraunhofer.de +----------------------------------------------------------------------------- */ + +/**************************** PCM utility library ****************************** + + Author(s): + + Description: + +*******************************************************************************/ + +#if !defined(VERSION_H) +#define VERSION_H + +/* library info */ +#define PCMUTIL_LIB_VL0 3 +#define PCMUTIL_LIB_VL1 0 +#define PCMUTIL_LIB_VL2 0 +#define PCMUTIL_LIB_TITLE "PCM Utility Lib" +#ifdef __ANDROID__ +#define PCMUTIL_LIB_BUILD_DATE "" +#define PCMUTIL_LIB_BUILD_TIME "" +#else +#define PCMUTIL_LIB_BUILD_DATE __DATE__ +#define PCMUTIL_LIB_BUILD_TIME __TIME__ +#endif + +#endif /* !defined(VERSION_H) */ |