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Diffstat (limited to 'libAACdec/src/conceal.cpp')
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diff --git a/libAACdec/src/conceal.cpp b/libAACdec/src/conceal.cpp deleted file mode 100644 index c26051c..0000000 --- a/libAACdec/src/conceal.cpp +++ /dev/null @@ -1,1865 +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 ------------------------------------------------------------------------------------------------------------ */ - -/***************************** MPEG-4 AAC Decoder ************************** - - Author(s): Josef Hoepfl - Description: independent channel concealment - -******************************************************************************/ - -/*! - \page concealment AAC core concealment - - This AAC core implementation includes a concealment function, which can be enabled - using the several defines during compilation. - - There are various tests inside the core, starting with simple CRC tests and ending in - a variety of plausibility checks. If such a check indicates an invalid bitstream, then - concealment is applied. - - Concealment is also applied when the calling main program indicates a distorted or missing - data frame using the frameOK flag. This is used for error detection on the transport layer. - (See below) - - There are three concealment-modes: - - 1) Muting: The spectral data is simply set to zero in case of an detected error. - - 2) Noise substitution: In case of an detected error, concealment copies the last frame and adds - attenuates the spectral data. For this mode you have to set the #CONCEAL_NOISE define. - Noise substitution adds no additional delay. - - 3) Interpolation: The interpolation routine swaps the spectral data from the previous and the - current frame just before the final frequency to time conversion. In case a single frame is - corrupted, concealmant interpolates between the last good and the first good frame to create - the spectral data for the missing frame. If multiple frames are corrupted, concealment - implements first a fade out based on slightly modified spectral values from the last good - frame. As soon as good frames are available, concealmant fades in the new spectral data. - For this mode you have to set the #CONCEAL_INTER define. Note that in this case, you also - need to set #SBR_BS_DELAY_ENABLE, which basically adds approriate delay in the SBR decoder. - Note that the Interpolating-Concealment increases the delay of your decoder by one frame - and that it does require additional resources such as memory and computational complexity. - - <h2>How concealment can be used with errors on the transport layer</h2> - - Many errors can or have to be detected on the transport layer. For example in IP based systems - packet loss can occur. The transport protocol used should indicate such packet loss by inserting - an empty frame with frameOK=0. -*/ - -#include "conceal.h" - -#include "aac_rom.h" -#include "genericStds.h" - - -/* PNS (of block) */ -#include "aacdec_pns.h" -#include "block.h" - -#include "FDK_tools_rom.h" - -#define CONCEAL_DFLT_COMF_NOISE_LEVEL ( 46 ) /* ~= -70 dB */ - - -/* default settings */ -#define CONCEAL_DFLT_FADEOUT_FRAMES ( 5 ) -#define CONCEAL_DFLT_FADEIN_FRAMES ( 5 ) -#define CONCEAL_DFLT_MUTE_RELEASE_FRAMES ( 3 ) - -#define CONCEAL_DFLT_FADE_FACTOR ( 0.707106781186548f ) /* 1/sqrt(2) */ - -/* some often used constants: */ -#define FIXP_ZERO FL2FXCONST_DBL(0.0f) -#define FIXP_ONE FL2FXCONST_DBL(1.0f) -#define FIXP_FL_CORRECTION FL2FXCONST_DBL(0.53333333333333333f) - -/* For parameter conversion */ -#define CONCEAL_PARAMETER_BITS ( 8 ) -#define CONCEAL_MAX_QUANT_FACTOR ( (1<<CONCEAL_PARAMETER_BITS)-1 ) -/*#define CONCEAL_MIN_ATTENUATION_FACTOR_025 ( FL2FXCONST_DBL(0.971627951577106174) )*/ /* -0.25 dB */ -#define CONCEAL_MIN_ATTENUATION_FACTOR_025_LD FL2FXCONST_DBL(-0.041524101186092029596853445212299) -/*#define CONCEAL_MIN_ATTENUATION_FACTOR_050 ( FL2FXCONST_DBL(0.944060876285923380) )*/ /* -0.50 dB */ -#define CONCEAL_MIN_ATTENUATION_FACTOR_050_LD FL2FXCONST_DBL(-0.083048202372184059253597008145293) - -typedef enum { - CConcealment_NoExpand, - CConcealment_Expand, - CConcealment_Compress -} -CConcealmentExpandType; - -static const FIXP_SGL facMod4Table[4] = { - FL2FXCONST_SGL(0.500000000f), /* FIXP_SGL(0x4000), 2^-(1-0,00) */ - FL2FXCONST_SGL(0.594603558f), /* FIXP_SGL(0x4c1b), 2^-(1-0,25) */ - FL2FXCONST_SGL(0.707106781f), /* FIXP_SGL(0x5a82), 2^-(1-0,50) */ - FL2FXCONST_SGL(0.840896415f) /* FIXP_SGL(0x6ba2) 2^-(1-0,75) */ -}; - - - - -static void - CConcealment_CalcBandEnergy ( - FIXP_DBL *spectrum, - const SamplingRateInfo *pSamplingRateInfo, - const int blockType, - CConcealmentExpandType ex, - int *sfbEnergy - ); - -static void - CConcealment_InterpolateBuffer ( - FIXP_DBL *spectrum, - SHORT *pSpecScalePrev, - SHORT *pSpecScaleAct, - SHORT *pSpecScaleOut, - int *enPrv, - int *enAct, - int sfbCnt, - const SHORT *pSfbOffset - ); - -static int - CConcealment_ApplyInter ( - CConcealmentInfo *pConcealmentInfo, - CAacDecoderChannelInfo *pAacDecoderChannelInfo, - const SamplingRateInfo *pSamplingRateInfo, - const int samplesPerFrame, - const int improveTonal, - const int frameOk - ); - - - -static int - CConcealment_ApplyNoise ( - CConcealmentInfo *pConcealmentInfo, - CAacDecoderChannelInfo *pAacDecoderChannelInfo, - CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo, - const SamplingRateInfo *pSamplingRateInfo, - const int samplesPerFrame, - const UINT flags - ); - -static void - CConcealment_UpdateState ( - CConcealmentInfo *pConcealmentInfo, - int frameOk - ); - -static void - CConcealment_ApplyRandomSign ( - int iRandomPhase, - FIXP_DBL *spec, - int samplesPerFrame - ); - - -static int CConcealment_GetWinSeq(int prevWinSeq) -{ - int newWinSeq = OnlyLongSequence; - - /* Try to have only long blocks */ - if ( prevWinSeq == LongStartSequence - || prevWinSeq == EightShortSequence ) - { - newWinSeq = LongStopSequence; - } - - return (newWinSeq); -} - - -/*! - \brief Init common concealment information data - - \pConcealCommonData Pointer to the concealment common data structure. - - \return none -*/ -void - CConcealment_InitCommonData (CConcealParams *pConcealCommonData) -{ - if (pConcealCommonData != NULL) - { - int i; - - /* Set default error concealment technique */ - pConcealCommonData->method = ConcealMethodInter; - - pConcealCommonData->numFadeOutFrames = CONCEAL_DFLT_FADEOUT_FRAMES; - pConcealCommonData->numFadeInFrames = CONCEAL_DFLT_FADEIN_FRAMES; - pConcealCommonData->numMuteReleaseFrames = CONCEAL_DFLT_MUTE_RELEASE_FRAMES; - - pConcealCommonData->comfortNoiseLevel = CONCEAL_DFLT_COMF_NOISE_LEVEL; - - /* Init fade factors (symetric) */ - pConcealCommonData->fadeOutFactor[0] = FL2FXCONST_SGL( CONCEAL_DFLT_FADE_FACTOR ); - pConcealCommonData->fadeInFactor[0] = pConcealCommonData->fadeOutFactor[0]; - - for (i = 1; i < CONCEAL_MAX_NUM_FADE_FACTORS; i++) { - pConcealCommonData->fadeOutFactor[i] = FX_DBL2FX_SGL(fMult(pConcealCommonData->fadeOutFactor[i-1],FL2FXCONST_SGL(CONCEAL_DFLT_FADE_FACTOR))); - pConcealCommonData->fadeInFactor[i] = pConcealCommonData->fadeOutFactor[i]; - } - } -} - - - -/*! - \brief Get current concealment method. - - \pConcealCommonData Pointer to common concealment data (for all channels) - - \return Concealment method. -*/ -CConcealmentMethod - CConcealment_GetMethod( CConcealParams *pConcealCommonData ) -{ - CConcealmentMethod method = ConcealMethodNone; - - if (pConcealCommonData != NULL) { - method = pConcealCommonData->method; - } - - return (method); -} - - -/*! - \brief Init concealment information for each channel - - The function initializes the concealment information. Two methods can be chosen: - 0 = interpolation method (adds delay) - 1 = noise substitution (no delay, low complexity) - - \return none -*/ -void - CConcealment_InitChannelData ( - CConcealmentInfo *pConcealChannelInfo, - CConcealParams *pConcealCommonData, - int samplesPerFrame ) -{ - int i; - - pConcealChannelInfo->pConcealParams = pConcealCommonData; - - FDKmemclear(pConcealChannelInfo->spectralCoefficient, 1024 * sizeof(FIXP_CNCL)); - - for (i = 0; i < 8; i++) { - pConcealChannelInfo->specScale[i] = 0; - } - - pConcealChannelInfo->iRandomPhase = 0; - - pConcealChannelInfo->windowSequence = 0; - pConcealChannelInfo->windowShape = 0; - - pConcealChannelInfo->prevFrameOk[0] = 1; - pConcealChannelInfo->prevFrameOk[1] = 1; - - pConcealChannelInfo->cntFadeFrames = 0; - pConcealChannelInfo->cntValidFrames = 0; - - pConcealChannelInfo->concealState = ConcealState_Ok; - -} - - -/*! - \brief Set error concealment parameters - - \concealParams - \method - \fadeOutSlope - \fadeInSlope - \muteRelease - \comfNoiseLevel - - \return none -*/ -AAC_DECODER_ERROR - CConcealment_SetParams ( - CConcealParams *concealParams, - int method, - int fadeOutSlope, - int fadeInSlope, - int muteRelease, - int comfNoiseLevel ) -{ - /* set concealment technique */ - if (method != AACDEC_CONCEAL_PARAM_NOT_SPECIFIED) { - switch ((CConcealmentMethod)method) - { - case ConcealMethodMute: - case ConcealMethodNoise: - case ConcealMethodInter: - /* Be sure to enable delay adjustment of SBR decoder! */ - if (concealParams == NULL) { - return AAC_DEC_INVALID_HANDLE; - } else { - /* set param */ - concealParams->method = (CConcealmentMethod)method; - } - break; - - default: - return AAC_DEC_SET_PARAM_FAIL; - } - } - - /* set number of frames for fade-out slope */ - if (fadeOutSlope != AACDEC_CONCEAL_PARAM_NOT_SPECIFIED) { - if ( (fadeOutSlope < CONCEAL_MAX_NUM_FADE_FACTORS) - && (fadeOutSlope >= 0) ) - { - if (concealParams == NULL) { - return AAC_DEC_INVALID_HANDLE; - } else { - /* set param */ - concealParams->numFadeOutFrames = fadeOutSlope; - } - } else { - return AAC_DEC_SET_PARAM_FAIL; - } - } - - /* set number of frames for fade-in slope */ - if (fadeInSlope != AACDEC_CONCEAL_PARAM_NOT_SPECIFIED) { - if ( (fadeInSlope < CONCEAL_MAX_NUM_FADE_FACTORS) - && (fadeInSlope >= 1) ) - { - if (concealParams == NULL) { - return AAC_DEC_INVALID_HANDLE; - } else { - /* set param */ - concealParams->numFadeInFrames = fadeInSlope; - } - } else { - return AAC_DEC_SET_PARAM_FAIL; - } - } - - /* set number of error-free frames after which the muting will be released */ - if (muteRelease != AACDEC_CONCEAL_PARAM_NOT_SPECIFIED) { - if ( (muteRelease < (CONCEAL_MAX_NUM_FADE_FACTORS<<1)) - && (muteRelease >= 0) ) - { - if (concealParams == NULL) { - return AAC_DEC_INVALID_HANDLE; - } else { - /* set param */ - concealParams->numMuteReleaseFrames = muteRelease; - } - } else { - return AAC_DEC_SET_PARAM_FAIL; - } - } - - /* set confort noise level which will be inserted while in state 'muting' */ - if (comfNoiseLevel != AACDEC_CONCEAL_PARAM_NOT_SPECIFIED) { - if ( (comfNoiseLevel < -1) - || (comfNoiseLevel > 127) ) { - return AAC_DEC_SET_PARAM_FAIL; - } - if (concealParams == NULL) { - return AAC_DEC_INVALID_HANDLE; - } else { - concealParams->comfortNoiseLevel = comfNoiseLevel; - } - } - - return (AAC_DEC_OK); -} - - -/*! - \brief Set fade-out/in attenuation factor vectors - - \concealParams - \fadeOutAttenuationVector - \fadeInAttenuationVector - - \return 0 if OK all other values indicate errors -*/ -AAC_DECODER_ERROR - CConcealment_SetAttenuation ( - CConcealParams *concealParams, - SHORT *fadeOutAttenuationVector, - SHORT *fadeInAttenuationVector ) -{ - if ( (fadeOutAttenuationVector == NULL) - && (fadeInAttenuationVector == NULL) ) { - return AAC_DEC_SET_PARAM_FAIL; - } - - /* Fade-out factors */ - if (fadeOutAttenuationVector != NULL) - { - int i; - - /* check quantized factors first */ - for (i = 0; i < CONCEAL_MAX_NUM_FADE_FACTORS; i++) { - if ((fadeOutAttenuationVector[i] < 0) || (fadeOutAttenuationVector[i] > CONCEAL_MAX_QUANT_FACTOR)) { - return AAC_DEC_SET_PARAM_FAIL; - } - } - if (concealParams == NULL) { - return AAC_DEC_INVALID_HANDLE; - } - - /* now dequantize factors */ - for (i = 0; i < CONCEAL_MAX_NUM_FADE_FACTORS; i++) - { - concealParams->fadeOutFactor[i] = - FX_DBL2FX_SGL( fLdPow( CONCEAL_MIN_ATTENUATION_FACTOR_025_LD, - 0, - (FIXP_DBL)((INT)(FL2FXCONST_DBL(1.0/2.0)>>(CONCEAL_PARAMETER_BITS-1)) * (INT)fadeOutAttenuationVector[i]), - CONCEAL_PARAMETER_BITS - ) - ); - } - } - - /* Fade-in factors */ - if (fadeInAttenuationVector != NULL) - { - int i; - - /* check quantized factors first */ - for (i = 0; i < CONCEAL_MAX_NUM_FADE_FACTORS; i++) { - if ((fadeInAttenuationVector[i] < 0) || (fadeInAttenuationVector[i] > CONCEAL_MAX_QUANT_FACTOR)) { - return AAC_DEC_SET_PARAM_FAIL; - } - } - if (concealParams == NULL) { - return AAC_DEC_INVALID_HANDLE; - } - - /* now dequantize factors */ - for (i = 0; i < CONCEAL_MAX_NUM_FADE_FACTORS; i++) - { - concealParams->fadeInFactor[i] = - FX_DBL2FX_SGL( fLdPow( CONCEAL_MIN_ATTENUATION_FACTOR_025_LD, - 0, - (FIXP_DBL)((INT)(FIXP_ONE>>CONCEAL_PARAMETER_BITS) * (INT)fadeInAttenuationVector[i]), - CONCEAL_PARAMETER_BITS - ) - ); - } - } - - return (AAC_DEC_OK); -} - - -/*! - \brief Get state of concealment module. - - \pConcealChannelInfo - - \return Concealment state. -*/ -CConcealmentState - CConcealment_GetState ( - CConcealmentInfo *pConcealChannelInfo - ) -{ - CConcealmentState state = ConcealState_Ok; - - if (pConcealChannelInfo != NULL) { - state = pConcealChannelInfo->concealState; - } - - return (state); -} - - -static void CConcealment_fakePnsData ( - CPnsData *pPnsData, - CIcsInfo *pIcsInfo, - const SamplingRateInfo *pSamplingRateInfo, - SHORT *pSpecScale, - SHORT *pScaleFactor, - const int level ) -{ - CPnsInterChannelData *pInterChannelData = pPnsData->pPnsInterChannelData; - - int pnsBand, band, group, win; - //int delta = 0; - int windowsPerFrame = GetWindowsPerFrame(pIcsInfo); - int refLevel = (windowsPerFrame > 1) ? 82 : 91; - - FDK_ASSERT(level >= 0 && level <= 127); - - for (win = 0; win < windowsPerFrame; win++) { - pSpecScale[win] = 31; - } - - /* fake ICS info if necessary */ - if (!IsValid(pIcsInfo)) { - pIcsInfo->WindowGroups = 1; - if (IsLongBlock(pIcsInfo)) { - pIcsInfo->TotalSfBands = pSamplingRateInfo->NumberOfScaleFactorBands_Long; - pIcsInfo->WindowGroupLength[0] = 1; - } - else { - pIcsInfo->TotalSfBands = pSamplingRateInfo->NumberOfScaleFactorBands_Short; - pIcsInfo->WindowGroupLength[0] = 8; - } - pIcsInfo->MaxSfBands = pIcsInfo->TotalSfBands; - } - - /* global activate PNS */ - pPnsData->PnsActive = 1; - /* set energy level */ - pPnsData->CurrentEnergy = fixMax( 0, refLevel - level ); - - /* - value: | Avg. RMS power | Avg. RMS power | - | specScale = 22 | specScale = 31 | - -------+----------------+----------------+ - 5 | | -99.0 dB - 15 | | -90.0 dB - 25 | | -89.7 dB - 35 | | -85.3 dB - ... | ... | ... - 45 | -69.9 dB | -70.0 dB - 50 | -62.2 dB | - 55 | -55.6 dB | -54.6 dB - 60 | -47.0 dB | - 65 | -39.5 dB | -39.5 dB - 70 | -31.9 dB | - 75 | -24.4 dB | -24.4 dB - 80 | -16.9 dB | - 85 | -9.4 dB (c) | -9.4 dB - 90 | -3.9 dB (c) | - 95 | | -2.1 dB - 100 | | -1.6 dB - 105 | | -1.4 dB - */ - - for (group=0; group < GetWindowGroups(pIcsInfo); group++) - { - for (band=0; band < GetScaleFactorBandsTransmitted(pIcsInfo); band++) - { - pnsBand = group * 16 + band; - - if (pnsBand >= NO_OFBANDS) { - return; - } - //pPnsData->CurrentEnergy += delta ; - pScaleFactor[pnsBand] = pPnsData->CurrentEnergy; - pInterChannelData->correlated[pnsBand] = 0; - pPnsData->pnsUsed[pnsBand] = 1; - } - } -} - - -/*! - \brief Store data for concealment techniques applied later - - Interface function to store data for different concealment strategies - - \return none - */ -void - CConcealment_Store ( - CConcealmentInfo *hConcealmentInfo, - CAacDecoderChannelInfo *pAacDecoderChannelInfo, - CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo ) -{ - if ( !(pAacDecoderChannelInfo->renderMode == AACDEC_RENDER_LPD - ) ) - { - FIXP_DBL *pSpectralCoefficient = SPEC_LONG(pAacDecoderChannelInfo->pSpectralCoefficient); - SHORT *pSpecScale = pAacDecoderChannelInfo->specScale; - CIcsInfo *pIcsInfo = &pAacDecoderChannelInfo->icsInfo; - - SHORT tSpecScale[8]; - UCHAR tWindowShape, tWindowSequence; - - /* store old window infos for swapping */ - tWindowSequence = hConcealmentInfo->windowSequence; - tWindowShape = hConcealmentInfo->windowShape; - - /* store old scale factors for swapping */ - FDKmemcpy(tSpecScale, hConcealmentInfo->specScale, 8*sizeof(SHORT)); - - /* store new window infos */ - hConcealmentInfo->windowSequence = GetWindowSequence(pIcsInfo); - hConcealmentInfo->windowShape = GetWindowShape(pIcsInfo); - hConcealmentInfo->lastWinGrpLen = *(GetWindowGroupLengthTable(pIcsInfo)+GetWindowGroups(pIcsInfo)-1); - - /* store new scale factors */ - FDKmemcpy(hConcealmentInfo->specScale, pSpecScale, 8*sizeof(SHORT)); - - if (CConcealment_GetDelay(hConcealmentInfo->pConcealParams) == 0) - { - /* store new spectral bins */ -#if (CNCL_FRACT_BITS == DFRACT_BITS) - FDKmemcpy(hConcealmentInfo->spectralCoefficient, pSpectralCoefficient, 1024 * sizeof(FIXP_CNCL)); -#else - FIXP_CNCL *RESTRICT pCncl = &hConcealmentInfo->spectralCoefficient[1024-1]; - FIXP_DBL *RESTRICT pSpec = &pSpectralCoefficient[1024-1]; - int i; - - for (i = 1024; i != 0; i--) { - *pCncl-- = FX_DBL2FX_CNCL(*pSpec--); - } -#endif - } - else - { - FIXP_CNCL *RESTRICT pCncl = &hConcealmentInfo->spectralCoefficient[1024-1]; - FIXP_DBL *RESTRICT pSpec = &pSpectralCoefficient[1024-1]; - int i; - - /* swap spectral data */ - for (i = 1024; i != 0; i--) { - FIXP_DBL tSpec = *pSpec; - *pSpec-- = FX_CNCL2FX_DBL(*pCncl); - *pCncl-- = FX_DBL2FX_CNCL( tSpec); - } - - /* complete swapping of window infos */ - pIcsInfo->WindowSequence = tWindowSequence; - pIcsInfo->WindowShape = tWindowShape; - - /* complete swapping of scale factors */ - FDKmemcpy(pSpecScale, tSpecScale, 8*sizeof(SHORT)); - } - } - -} - - -/*! - \brief Apply concealment - - Interface function to different concealment strategies - - \return none - */ -int - CConcealment_Apply ( - CConcealmentInfo *hConcealmentInfo, - CAacDecoderChannelInfo *pAacDecoderChannelInfo, - CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo, - const SamplingRateInfo *pSamplingRateInfo, - const int samplesPerFrame, - const UCHAR lastLpdMode, - const int frameOk, - const UINT flags) -{ - int appliedProcessing = 0; - - if ( (frameOk == 0) - && (pAacDecoderChannelInfo->renderMode != (AACDEC_RENDER_MODE)hConcealmentInfo->lastRenderMode) ) { - /* restore the last render mode to stay in the same domain which allows to do a proper concealment */ - pAacDecoderChannelInfo->renderMode = (AACDEC_RENDER_MODE)hConcealmentInfo->lastRenderMode; - } else { - /* otherwise store the current mode */ - hConcealmentInfo->lastRenderMode = (SCHAR)pAacDecoderChannelInfo->renderMode; - } - - if ( frameOk ) - { - /* Rescue current data for concealment in future frames */ - CConcealment_Store ( hConcealmentInfo, - pAacDecoderChannelInfo, - pAacDecoderStaticChannelInfo ); - /* Reset index to random sign vector to make sign calculation frame agnostic - (only depends on number of subsequently concealed spectral blocks) */ - hConcealmentInfo->iRandomPhase = 0; - } - - /* hand current frame status to the state machine */ - CConcealment_UpdateState( hConcealmentInfo, - frameOk ); - - if ( !frameOk ) - { - /* Create data for signal rendering according to the selected concealment method and decoder operating mode. */ - - - if ( !(pAacDecoderChannelInfo->renderMode == AACDEC_RENDER_LPD - ) - ) - { - switch (hConcealmentInfo->pConcealParams->method) - { - default: - case ConcealMethodMute: - /* Mute spectral data in case of errors */ - FDKmemclear(pAacDecoderChannelInfo->pSpectralCoefficient, samplesPerFrame * sizeof(FIXP_DBL)); - /* Set last window shape */ - pAacDecoderChannelInfo->icsInfo.WindowShape = hConcealmentInfo->windowShape; - appliedProcessing = 1; - break; - - case ConcealMethodNoise: - /* Noise substitution error concealment technique */ - appliedProcessing = - CConcealment_ApplyNoise (hConcealmentInfo, - pAacDecoderChannelInfo, - pAacDecoderStaticChannelInfo, - pSamplingRateInfo, - samplesPerFrame, - flags); - break; - - case ConcealMethodInter: - /* Energy interpolation concealment based on 3GPP */ - appliedProcessing = - CConcealment_ApplyInter (hConcealmentInfo, - pAacDecoderChannelInfo, - pSamplingRateInfo, - samplesPerFrame, - 0, /* don't use tonal improvement */ - 0); - break; - - } - } - } - /* update history */ - hConcealmentInfo->prevFrameOk[0] = hConcealmentInfo->prevFrameOk[1]; - hConcealmentInfo->prevFrameOk[1] = frameOk; - - return appliedProcessing; -} - -/*! -\brief Apply concealment noise substitution - - In case of frame lost this function produces a noisy frame with respect to the - energies values of past frame. - -\return none - */ -static int - CConcealment_ApplyNoise (CConcealmentInfo *pConcealmentInfo, - CAacDecoderChannelInfo *pAacDecoderChannelInfo, - CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo, - const SamplingRateInfo *pSamplingRateInfo, - const int samplesPerFrame, - const UINT flags) -{ - CConcealParams *pConcealCommonData = pConcealmentInfo->pConcealParams; - - FIXP_DBL *pSpectralCoefficient = SPEC_LONG(pAacDecoderChannelInfo->pSpectralCoefficient); - SHORT *pSpecScale = pAacDecoderChannelInfo->specScale; - CIcsInfo *pIcsInfo = &pAacDecoderChannelInfo->icsInfo; - - int appliedProcessing = 0; - - FDK_ASSERT((samplesPerFrame>=480) && (samplesPerFrame<=1024)); - FDK_ASSERT((samplesPerFrame&0x1F) == 0); - - switch (pConcealmentInfo->concealState) - { - case ConcealState_Ok: - /* Nothing to do here! */ - break; - - case ConcealState_Single: - case ConcealState_FadeOut: - { - /* restore frequency coefficients from buffer with a specific muting */ - FIXP_SGL fac; - int win, numWindows = 1; - int windowLen = samplesPerFrame; - int tFadeFrames, lastWindow = 0; - int win_idx_stride = 1; - - FDK_ASSERT(pConcealmentInfo != NULL); - FDK_ASSERT(pConcealmentInfo->cntFadeFrames >= 0); - FDK_ASSERT(pConcealmentInfo->cntFadeFrames < CONCEAL_MAX_NUM_FADE_FACTORS); - FDK_ASSERT(pConcealmentInfo->cntFadeFrames <= pConcealCommonData->numFadeOutFrames); - - /* get attenuation factor */ - tFadeFrames = pConcealmentInfo->cntFadeFrames; - fac = pConcealCommonData->fadeOutFactor[tFadeFrames]; - - /* set old window parameters */ - { - pIcsInfo->WindowShape = pConcealmentInfo->windowShape; - pIcsInfo->WindowSequence = pConcealmentInfo->windowSequence; - - if (pConcealmentInfo->windowSequence == 2) { - /* short block handling */ - numWindows = 8; - windowLen = samplesPerFrame >> 3; - lastWindow = numWindows - pConcealmentInfo->lastWinGrpLen; - } - } - - for (win = 0; win < numWindows; win++) { - FIXP_CNCL *pCncl = pConcealmentInfo->spectralCoefficient + (lastWindow * windowLen); - FIXP_DBL *pOut = pSpectralCoefficient + (win * windowLen); - int i; - - FDK_ASSERT((lastWindow * windowLen + windowLen) <= samplesPerFrame); - - /* restore frequency coefficients from buffer with a specific attenuation */ - for (i = 0; i < windowLen; i++) { - pOut[i] = fMult(pCncl[i], fac); - } - - /* apply random change of sign for spectral coefficients */ - CConcealment_ApplyRandomSign(pConcealmentInfo->iRandomPhase, - pOut, - windowLen ); - - /* Increment random phase index to avoid repetition artifacts. */ - pConcealmentInfo->iRandomPhase = (pConcealmentInfo->iRandomPhase + 1) & (AAC_NF_NO_RANDOM_VAL - 1); - - /* set old scale factors */ - pSpecScale[win*win_idx_stride] = pConcealmentInfo->specScale[win_idx_stride*lastWindow++]; - - if ( (lastWindow >= numWindows) - && (numWindows > 1) ) - { - /* end of sequence -> rewind */ - lastWindow = numWindows - pConcealmentInfo->lastWinGrpLen; - /* update the attenuation factor to get a faster fade-out */ - tFadeFrames += 1; - if (tFadeFrames < pConcealCommonData->numFadeOutFrames) { - fac = pConcealCommonData->fadeOutFactor[tFadeFrames]; - } else { - fac = (FIXP_SGL)0; - } - } - } - - /* store temp vars */ - pConcealmentInfo->cntFadeFrames = tFadeFrames; - appliedProcessing = 1; - } - break; - - case ConcealState_Mute: - { - /* set dummy window parameters */ - pIcsInfo->Valid = 0; /* Trigger the generation of a consitent IcsInfo */ - pIcsInfo->WindowShape = pConcealmentInfo->windowShape; /* Prevent an invalid WindowShape (required for F/T transform) */ - pIcsInfo->WindowSequence = CConcealment_GetWinSeq(pConcealmentInfo->windowSequence); - pConcealmentInfo->windowSequence = pIcsInfo->WindowSequence; /* Store for next frame (spectrum in concealment buffer can't be used at all) */ - - /* mute spectral data */ - FDKmemclear(pSpectralCoefficient, samplesPerFrame * sizeof(FIXP_DBL)); - - if ( !(flags & (AC_USAC|AC_RSVD50)) - && pConcealCommonData->comfortNoiseLevel >= 0 - && pConcealCommonData->comfortNoiseLevel <= 61 /* -90dB */) - { - /* insert comfort noise using PNS */ - CConcealment_fakePnsData ( - &pAacDecoderChannelInfo->data.aac.PnsData, - pIcsInfo, - pSamplingRateInfo, - pAacDecoderChannelInfo->pDynData->aSfbScale, - pAacDecoderChannelInfo->pDynData->aScaleFactor, - pConcealCommonData->comfortNoiseLevel - ); - - CPns_Apply ( - &pAacDecoderChannelInfo->data.aac.PnsData, - pIcsInfo, - pAacDecoderChannelInfo->pSpectralCoefficient, - pAacDecoderChannelInfo->specScale, - pAacDecoderChannelInfo->pDynData->aScaleFactor, - pSamplingRateInfo, - pAacDecoderChannelInfo->granuleLength, - 0 /* always apply to first channel */ - ); - } - appliedProcessing = 1; - } - break; - - case ConcealState_FadeIn: - { - FDK_ASSERT(pConcealmentInfo->cntFadeFrames >= 0); - FDK_ASSERT(pConcealmentInfo->cntFadeFrames < CONCEAL_MAX_NUM_FADE_FACTORS); - FDK_ASSERT(pConcealmentInfo->cntFadeFrames < pConcealCommonData->numFadeInFrames); - - /* attenuate signal to get a smooth fade-in */ - FIXP_DBL *RESTRICT pOut = &pSpectralCoefficient[samplesPerFrame-1]; - FIXP_SGL fac = pConcealCommonData->fadeInFactor[pConcealmentInfo->cntFadeFrames]; - int i; - - for (i = samplesPerFrame; i != 0; i--) { - *pOut = fMult(*pOut, fac); - pOut--; - } - appliedProcessing = 1; - } - break; - - default: - /* we shouldn't come here anyway */ - FDK_ASSERT(0); - break; - } - - return appliedProcessing; -} - - -/*! - \brief Apply concealment interpolation - - The function swaps the data from the current and the previous frame. If an - error has occured, frame interpolation is performed to restore the missing - frame. In case of multiple faulty frames, fade-in and fade-out is applied. - - \return none -*/ -static int - CConcealment_ApplyInter ( - CConcealmentInfo *pConcealmentInfo, - CAacDecoderChannelInfo *pAacDecoderChannelInfo, - const SamplingRateInfo *pSamplingRateInfo, - const int samplesPerFrame, - const int improveTonal, - const int frameOk ) -{ - CConcealParams *pConcealCommonData = pConcealmentInfo->pConcealParams; - - FIXP_DBL *pSpectralCoefficient = SPEC_LONG(pAacDecoderChannelInfo->pSpectralCoefficient); - CIcsInfo *pIcsInfo = &pAacDecoderChannelInfo->icsInfo; - SHORT *pSpecScale = pAacDecoderChannelInfo->specScale; - - - int sfbEnergyPrev[64]; - int sfbEnergyAct [64]; - - int i, appliedProcessing = 0; - - /* clear/init */ - FDKmemclear(sfbEnergyPrev, 64 * sizeof(int)); - FDKmemclear(sfbEnergyAct, 64 * sizeof(int)); - - - if (!frameOk) - { - /* Restore last frame from concealment buffer */ - pIcsInfo->WindowShape = pConcealmentInfo->windowShape; - pIcsInfo->WindowSequence = pConcealmentInfo->windowSequence; - - /* Restore spectral data */ - for (i = 0; i < samplesPerFrame; i++) { - pSpectralCoefficient[i] = FX_CNCL2FX_DBL(pConcealmentInfo->spectralCoefficient[i]); - } - - /* Restore scale factors */ - FDKmemcpy(pSpecScale, pConcealmentInfo->specScale, 8*sizeof(SHORT)); - } - - /* if previous frame was not ok */ - if (!pConcealmentInfo->prevFrameOk[1]) { - - /* if current frame (f_n) is ok and the last but one frame (f_(n-2)) - was ok, too, then interpolate both frames in order to generate - the current output frame (f_(n-1)). Otherwise, use the last stored - frame (f_(n-2) or f_(n-3) or ...). */ - if (frameOk && pConcealmentInfo->prevFrameOk[0]) - { - appliedProcessing = 1; - - - /* Interpolate both frames in order to generate the current output frame (f_(n-1)). */ - if (pIcsInfo->WindowSequence == EightShortSequence) { - /* f_(n-2) == EightShortSequence */ - /* short--??????--short, short--??????--long interpolation */ - /* short--short---short, short---long---long interpolation */ - - int wnd; - - if (pConcealmentInfo->windowSequence == EightShortSequence) { /* f_n == EightShortSequence */ - /* short--short---short interpolation */ - - int scaleFactorBandsTotal = pSamplingRateInfo->NumberOfScaleFactorBands_Short; - const SHORT *pSfbOffset = pSamplingRateInfo->ScaleFactorBands_Short; - pIcsInfo->WindowShape = 1; - pIcsInfo->WindowSequence = EightShortSequence; - - for (wnd = 0; wnd < 8; wnd++) - { - CConcealment_CalcBandEnergy( - &pSpectralCoefficient[wnd * (samplesPerFrame / 8)], /* spec_(n-2) */ - pSamplingRateInfo, - EightShortSequence, - CConcealment_NoExpand, - sfbEnergyPrev); - - CConcealment_CalcBandEnergy( - &pConcealmentInfo->spectralCoefficient[wnd * (samplesPerFrame / 8)], /* spec_n */ - pSamplingRateInfo, - EightShortSequence, - CConcealment_NoExpand, - sfbEnergyAct); - - CConcealment_InterpolateBuffer( - &pSpectralCoefficient[wnd * (samplesPerFrame / 8)], /* spec_(n-1) */ - &pSpecScale[wnd], - &pConcealmentInfo->specScale[wnd], - &pSpecScale[wnd], - sfbEnergyPrev, - sfbEnergyAct, - scaleFactorBandsTotal, - pSfbOffset); - - } - } else { /* f_n != EightShortSequence */ - /* short---long---long interpolation */ - - int scaleFactorBandsTotal = pSamplingRateInfo->NumberOfScaleFactorBands_Long; - const SHORT *pSfbOffset = pSamplingRateInfo->ScaleFactorBands_Long; - SHORT specScaleOut; - - CConcealment_CalcBandEnergy(&pSpectralCoefficient[samplesPerFrame - (samplesPerFrame / 8)], /* [wnd] spec_(n-2) */ - pSamplingRateInfo, - EightShortSequence, - CConcealment_Expand, - sfbEnergyAct); - - CConcealment_CalcBandEnergy(pConcealmentInfo->spectralCoefficient, /* spec_n */ - pSamplingRateInfo, - OnlyLongSequence, - CConcealment_NoExpand, - sfbEnergyPrev); - - pIcsInfo->WindowShape = 0; - pIcsInfo->WindowSequence = LongStopSequence; - - for (i = 0; i < samplesPerFrame ; i++) { - pSpectralCoefficient[i] = pConcealmentInfo->spectralCoefficient[i]; /* spec_n */ - } - - for (i = 0; i < 8; i++) { /* search for max(specScale) */ - if (pSpecScale[i] > pSpecScale[0]) { - pSpecScale[0] = pSpecScale[i]; - } - } - - CConcealment_InterpolateBuffer( - pSpectralCoefficient, /* spec_(n-1) */ - &pConcealmentInfo->specScale[0], - &pSpecScale[0], - &specScaleOut, - sfbEnergyPrev, - sfbEnergyAct, - scaleFactorBandsTotal, - pSfbOffset); - - pSpecScale[0] = specScaleOut; - } - } else { - /* long--??????--short, long--??????--long interpolation */ - /* long---long---short, long---long---long interpolation */ - - int scaleFactorBandsTotal = pSamplingRateInfo->NumberOfScaleFactorBands_Long; - const SHORT *pSfbOffset = pSamplingRateInfo->ScaleFactorBands_Long; - SHORT specScaleAct = pConcealmentInfo->specScale[0]; - - CConcealment_CalcBandEnergy(pSpectralCoefficient, /* spec_(n-2) */ - pSamplingRateInfo, - OnlyLongSequence, - CConcealment_NoExpand, - sfbEnergyPrev); - - if (pConcealmentInfo->windowSequence == EightShortSequence) { /* f_n == EightShortSequence */ - /* long---long---short interpolation */ - - pIcsInfo->WindowShape = 1; - pIcsInfo->WindowSequence = LongStartSequence; - - for (i = 1; i < 8; i++) { /* search for max(specScale) */ - if (pConcealmentInfo->specScale[i] > specScaleAct) { - specScaleAct = pConcealmentInfo->specScale[i]; - } - } - - /* Expand first short spectrum */ - CConcealment_CalcBandEnergy(pConcealmentInfo->spectralCoefficient, /* spec_n */ - pSamplingRateInfo, - EightShortSequence, - CConcealment_Expand, /* !!! */ - sfbEnergyAct); - } else { - /* long---long---long interpolation */ - - pIcsInfo->WindowShape = 0; - pIcsInfo->WindowSequence = OnlyLongSequence; - - CConcealment_CalcBandEnergy(pConcealmentInfo->spectralCoefficient, /* spec_n */ - pSamplingRateInfo, - OnlyLongSequence, - CConcealment_NoExpand, - sfbEnergyAct); - } - - CConcealment_InterpolateBuffer( - pSpectralCoefficient, /* spec_(n-1) */ - &pSpecScale[0], - &specScaleAct, - &pSpecScale[0], - sfbEnergyPrev, - sfbEnergyAct, - scaleFactorBandsTotal, - pSfbOffset); - - } - } - - /* Noise substitution of sign of the output spectral coefficients */ - CConcealment_ApplyRandomSign (pConcealmentInfo->iRandomPhase, - pSpectralCoefficient, - samplesPerFrame); - /* Increment random phase index to avoid repetition artifacts. */ - pConcealmentInfo->iRandomPhase = (pConcealmentInfo->iRandomPhase + 1) & (AAC_NF_NO_RANDOM_VAL - 1); - } - - /* scale spectrum according to concealment state */ - switch (pConcealmentInfo->concealState) - { - case ConcealState_Single: - appliedProcessing = 1; - break; - - case ConcealState_FadeOut: - { - FDK_ASSERT(pConcealmentInfo->cntFadeFrames >= 0); - FDK_ASSERT(pConcealmentInfo->cntFadeFrames < CONCEAL_MAX_NUM_FADE_FACTORS); - FDK_ASSERT(pConcealmentInfo->cntFadeFrames < pConcealCommonData->numFadeOutFrames); - - /* restore frequency coefficients from buffer with a specific muting */ - FIXP_DBL *RESTRICT pOut = &pSpectralCoefficient[samplesPerFrame-1]; - FIXP_SGL fac = pConcealCommonData->fadeOutFactor[pConcealmentInfo->cntFadeFrames]; - - for (i = samplesPerFrame; i != 0; i--) { - *pOut = fMult(*pOut, fac); - pOut--; - } - appliedProcessing = 1; - } - break; - - case ConcealState_FadeIn: - { - FDK_ASSERT(pConcealmentInfo->cntFadeFrames >= 0); - FDK_ASSERT(pConcealmentInfo->cntFadeFrames < CONCEAL_MAX_NUM_FADE_FACTORS); - FDK_ASSERT(pConcealmentInfo->cntFadeFrames < pConcealCommonData->numFadeInFrames); - - /* attenuate signal to get a smooth fade-in */ - FIXP_DBL *RESTRICT pOut = &pSpectralCoefficient[samplesPerFrame-1]; - FIXP_SGL fac = pConcealCommonData->fadeInFactor[pConcealmentInfo->cntFadeFrames]; - - for (i = samplesPerFrame; i != 0; i--) { - *pOut = fMult(*pOut, fac); - pOut--; - } - appliedProcessing = 1; - } - break; - - case ConcealState_Mute: - { - int fac = pConcealCommonData->comfortNoiseLevel; - - /* set dummy window parameters */ - pIcsInfo->Valid = 0; /* Trigger the generation of a consitent IcsInfo */ - pIcsInfo->WindowShape = pConcealmentInfo->windowShape; /* Prevent an invalid WindowShape (required for F/T transform) */ - pIcsInfo->WindowSequence = CConcealment_GetWinSeq(pConcealmentInfo->windowSequence); - pConcealmentInfo->windowSequence = pIcsInfo->WindowSequence; /* Store for next frame (spectrum in concealment buffer can't be used at all) */ - - /* mute spectral data */ - FDKmemclear(pSpectralCoefficient, samplesPerFrame * sizeof(FIXP_DBL)); - - if (fac >= 0 && fac <= 61) { - /* insert comfort noise using PNS */ - CConcealment_fakePnsData ( - &pAacDecoderChannelInfo->data.aac.PnsData, - pIcsInfo, - pSamplingRateInfo, - pAacDecoderChannelInfo->specScale, - pAacDecoderChannelInfo->pDynData->aScaleFactor, - fac - ); - - CPns_Apply ( - &pAacDecoderChannelInfo->data.aac.PnsData, - pIcsInfo, - pAacDecoderChannelInfo->pSpectralCoefficient, - pAacDecoderChannelInfo->specScale, - pAacDecoderChannelInfo->pDynData->aScaleFactor, - pSamplingRateInfo, - pAacDecoderChannelInfo->granuleLength, - 0 /* always apply to first channel */ - ); - } - appliedProcessing = 1; - } - break; - - default: - /* nothing to do here */ - break; - } - - return appliedProcessing; -} - - -/*! - \brief Calculate the spectral energy - - The function calculates band-wise the spectral energy. This is used for - frame interpolation. - - \return none -*/ -static void - CConcealment_CalcBandEnergy ( - FIXP_DBL *spectrum, - const SamplingRateInfo *pSamplingRateInfo, - const int blockType, - CConcealmentExpandType expandType, - int *sfbEnergy ) -{ - const SHORT *pSfbOffset; - int line, sfb, scaleFactorBandsTotal = 0; - - /* In the following calculations, enAccu is initialized with LSB-value in order to avoid zero energy-level */ - - line = 0; - - switch(blockType) { - - case OnlyLongSequence: - case LongStartSequence: - case LongStopSequence: - - if (expandType == CConcealment_NoExpand) { - /* standard long calculation */ - scaleFactorBandsTotal = pSamplingRateInfo->NumberOfScaleFactorBands_Long; - pSfbOffset = pSamplingRateInfo->ScaleFactorBands_Long; - - for (sfb = 0; sfb < scaleFactorBandsTotal; sfb++) { - FIXP_DBL enAccu = (FIXP_DBL)(LONG)1; - int sfbScale = (sizeof(LONG)<<3) - CntLeadingZeros(pSfbOffset[sfb+1] - pSfbOffset[sfb]) - 1; - /* scaling depends on sfb width. */ - for ( ; line < pSfbOffset[sfb+1]; line++) { - enAccu += fPow2Div2(*(spectrum + line)) >> sfbScale; - } - *(sfbEnergy + sfb) = CntLeadingZeros(enAccu) - 1; - } - } - else { - /* compress long to short */ - scaleFactorBandsTotal = pSamplingRateInfo->NumberOfScaleFactorBands_Short; - pSfbOffset = pSamplingRateInfo->ScaleFactorBands_Short; - - for (sfb = 0; sfb < scaleFactorBandsTotal; sfb++) { - FIXP_DBL enAccu = (FIXP_DBL)(LONG)1; - int sfbScale = (sizeof(LONG)<<3) - CntLeadingZeros(pSfbOffset[sfb+1] - pSfbOffset[sfb]) - 1; - /* scaling depends on sfb width. */ - for (; line < pSfbOffset[sfb+1] << 3; line++) { - enAccu += (enAccu + (fPow2Div2(*(spectrum + line)) >> sfbScale)) >> 3; - } - *(sfbEnergy + sfb) = CntLeadingZeros(enAccu) - 1; - } - } - break; - - case EightShortSequence: - - if (expandType == CConcealment_NoExpand) { - /* standard short calculation */ - scaleFactorBandsTotal = pSamplingRateInfo->NumberOfScaleFactorBands_Short; - pSfbOffset = pSamplingRateInfo->ScaleFactorBands_Short; - - for (sfb = 0; sfb < scaleFactorBandsTotal; sfb++) { - FIXP_DBL enAccu = (FIXP_DBL)(LONG)1; - int sfbScale = (sizeof(LONG)<<3) - CntLeadingZeros(pSfbOffset[sfb+1] - pSfbOffset[sfb]) - 1; - /* scaling depends on sfb width. */ - for ( ; line < pSfbOffset[sfb+1]; line++) { - enAccu += fPow2Div2(*(spectrum + line)) >> sfbScale; - } - *(sfbEnergy + sfb) = CntLeadingZeros(enAccu) - 1; - } - } - else { - /* expand short to long spectrum */ - scaleFactorBandsTotal = pSamplingRateInfo->NumberOfScaleFactorBands_Long; - pSfbOffset = pSamplingRateInfo->ScaleFactorBands_Long; - - for (sfb = 0; sfb < scaleFactorBandsTotal; sfb++) { - FIXP_DBL enAccu = (FIXP_DBL)(LONG)1; - int sfbScale = (sizeof(LONG)<<3) - CntLeadingZeros(pSfbOffset[sfb+1] - pSfbOffset[sfb]) - 1; - /* scaling depends on sfb width. */ - for ( ; line < pSfbOffset[sfb+1]; line++) { - enAccu += fPow2Div2(*(spectrum + (line >> 3))) >> sfbScale; - } - *(sfbEnergy + sfb) = CntLeadingZeros(enAccu) - 1; - } - } - break; - } -} - - -/*! - \brief Interpolate buffer - - The function creates the interpolated spectral data according to the - energy of the last good frame and the current (good) frame. - - \return none -*/ -static void - CConcealment_InterpolateBuffer ( - FIXP_DBL *spectrum, - SHORT *pSpecScalePrv, - SHORT *pSpecScaleAct, - SHORT *pSpecScaleOut, - int *enPrv, - int *enAct, - int sfbCnt, - const SHORT *pSfbOffset ) -{ - int sfb, line = 0; - int fac_shift; - int fac_mod; - FIXP_DBL accu; - - for (sfb = 0; sfb < sfbCnt; sfb++) { - - fac_shift = enPrv[sfb] - enAct[sfb] + ((*pSpecScaleAct - *pSpecScalePrv) << 1); - fac_mod = fac_shift & 3; - fac_shift = (fac_shift >> 2) + 1; - fac_shift += *pSpecScalePrv - fixMax(*pSpecScalePrv, *pSpecScaleAct); - - for (; line < pSfbOffset[sfb+1]; line++) { - accu = fMult(*(spectrum+line), facMod4Table[fac_mod]); - if (fac_shift < 0) { - accu >>= -fac_shift; - } else { - accu <<= fac_shift; - } - *(spectrum+line) = accu; - } - } - *pSpecScaleOut = fixMax(*pSpecScalePrv, *pSpecScaleAct); -} - - - - -static INT findEquiFadeFrame ( - CConcealParams *pConcealCommonData, - INT actFadeIndex, - int direction ) -{ - FIXP_SGL *pFactor; - FIXP_SGL referenceVal; - FIXP_SGL minDiff = (FIXP_SGL)MAXVAL_SGL; - - INT numFrames = 0; - INT nextFadeIndex = 0; - - int i; - - /* init depending on direction */ - if (direction == 0) { /* FADE-OUT => FADE-IN */ - numFrames = pConcealCommonData->numFadeInFrames; - referenceVal = pConcealCommonData->fadeOutFactor[actFadeIndex] >> 1; - pFactor = pConcealCommonData->fadeInFactor; - } - else { /* FADE-IN => FADE-OUT */ - numFrames = pConcealCommonData->numFadeOutFrames; - referenceVal = pConcealCommonData->fadeInFactor[actFadeIndex] >> 1; - pFactor = pConcealCommonData->fadeOutFactor; - } - - /* search for minimum difference */ - for (i = 0; i < numFrames; i++) { - FIXP_SGL diff = fixp_abs((pFactor[i]>>1) - referenceVal); - if (diff < minDiff) { - minDiff = diff; - nextFadeIndex = i; - } - } - - /* check and adjust depending on direction */ - if (direction == 0) { /* FADE-OUT => FADE-IN */ - if (((pFactor[nextFadeIndex]>>1) <= referenceVal) && (nextFadeIndex > 0)) { - nextFadeIndex -= 1; - } - } - else { /* FADE-IN => FADE-OUT */ - if (((pFactor[nextFadeIndex]>>1) >= referenceVal) && (nextFadeIndex < numFrames-1)) { - nextFadeIndex += 1; - } - } - - return (nextFadeIndex); -} - - -/*! - \brief Update the concealment state - - The function updates the state of the concealment state-machine. The - states are: mute, fade-in, fade-out, interpolate and frame-ok. - - \return none -*/ -static void - CConcealment_UpdateState ( - CConcealmentInfo *pConcealmentInfo, - int frameOk ) -{ - CConcealParams *pConcealCommonData = pConcealmentInfo->pConcealParams; - - switch (pConcealCommonData->method) - { - case ConcealMethodNoise: - { - if (pConcealmentInfo->concealState != ConcealState_Ok) { - /* count the valid frames during concealment process */ - if (frameOk) { - pConcealmentInfo->cntValidFrames += 1; - } else { - pConcealmentInfo->cntValidFrames = 0; - } - } - - /* -- STATE MACHINE for Noise Substitution -- */ - switch (pConcealmentInfo->concealState) - { - case ConcealState_Ok: - if (!frameOk) { - if (pConcealCommonData->numFadeOutFrames > 0) { - /* change to state SINGLE-FRAME-LOSS */ - pConcealmentInfo->concealState = ConcealState_Single; - } else { - /* change to state MUTE */ - pConcealmentInfo->concealState = ConcealState_Mute; - } - pConcealmentInfo->cntFadeFrames = 0; - pConcealmentInfo->cntValidFrames = 0; - } - break; - - case ConcealState_Single: /* Just a pre-stage before fade-out begins. Stay here only one frame! */ - pConcealmentInfo->cntFadeFrames += 1; - if (frameOk) { - if (pConcealmentInfo->cntValidFrames > pConcealCommonData->numMuteReleaseFrames) { - /* change to state FADE-IN */ - pConcealmentInfo->concealState = ConcealState_FadeIn; - pConcealmentInfo->cntFadeFrames = findEquiFadeFrame( pConcealCommonData, - pConcealmentInfo->cntFadeFrames-1, - 0 /* FadeOut -> FadeIn */); - } else { - /* change to state OK */ - pConcealmentInfo->concealState = ConcealState_Ok; - } - } else { - if (pConcealmentInfo->cntFadeFrames >= pConcealCommonData->numFadeOutFrames) { - /* change to state MUTE */ - pConcealmentInfo->concealState = ConcealState_Mute; - } else { - /* change to state FADE-OUT */ - pConcealmentInfo->concealState = ConcealState_FadeOut; - } - } - break; - - case ConcealState_FadeOut: - pConcealmentInfo->cntFadeFrames += 1; /* used to address the fade-out factors */ - if (pConcealmentInfo->cntValidFrames > pConcealCommonData->numMuteReleaseFrames) { - if (pConcealCommonData->numFadeInFrames > 0) { - /* change to state FADE-IN */ - pConcealmentInfo->concealState = ConcealState_FadeIn; - pConcealmentInfo->cntFadeFrames = findEquiFadeFrame( pConcealCommonData, - pConcealmentInfo->cntFadeFrames-1, - 0 /* FadeOut -> FadeIn */); - } else { - /* change to state OK */ - pConcealmentInfo->concealState = ConcealState_Ok; - } - } else { - if (pConcealmentInfo->cntFadeFrames >= pConcealCommonData->numFadeOutFrames) { - /* change to state MUTE */ - pConcealmentInfo->concealState = ConcealState_Mute; - } - } - break; - - case ConcealState_Mute: - if (pConcealmentInfo->cntValidFrames > pConcealCommonData->numMuteReleaseFrames) { - if (pConcealCommonData->numFadeInFrames > 0) { - /* change to state FADE-IN */ - pConcealmentInfo->concealState = ConcealState_FadeIn; - pConcealmentInfo->cntFadeFrames = pConcealCommonData->numFadeInFrames - 1; - } else { - /* change to state OK */ - pConcealmentInfo->concealState = ConcealState_Ok; - } - } - break; - - case ConcealState_FadeIn: - pConcealmentInfo->cntFadeFrames -= 1; /* used to address the fade-in factors */ - if (frameOk) { - if (pConcealmentInfo->cntFadeFrames < 0) { - /* change to state OK */ - pConcealmentInfo->concealState = ConcealState_Ok; - } - } else { - if (pConcealCommonData->numFadeOutFrames > 0) { - /* change to state FADE-OUT */ - pConcealmentInfo->concealState = ConcealState_FadeOut; - pConcealmentInfo->cntFadeFrames = findEquiFadeFrame( pConcealCommonData, - pConcealmentInfo->cntFadeFrames+1, - 1 /* FadeIn -> FadeOut */); - } else { - /* change to state MUTE */ - pConcealmentInfo->concealState = ConcealState_Mute; - } - } - break; - - default: - FDK_ASSERT(0); - break; - } - } - break; - - case ConcealMethodInter: - case ConcealMethodTonal: - { - if (pConcealmentInfo->concealState != ConcealState_Ok) { - /* count the valid frames during concealment process */ - if ( pConcealmentInfo->prevFrameOk[1] || - (pConcealmentInfo->prevFrameOk[0] && !pConcealmentInfo->prevFrameOk[1] && frameOk) ) { - /* The frame is OK even if it can be estimated by the energy interpolation algorithm */ - pConcealmentInfo->cntValidFrames += 1; - } else { - pConcealmentInfo->cntValidFrames = 0; - } - } - - /* -- STATE MACHINE for energy interpolation -- */ - switch (pConcealmentInfo->concealState) - { - case ConcealState_Ok: - if (!(pConcealmentInfo->prevFrameOk[1] || - (pConcealmentInfo->prevFrameOk[0] && !pConcealmentInfo->prevFrameOk[1] && frameOk))) { - if (pConcealCommonData->numFadeOutFrames > 0) { - /* Fade out only if the energy interpolation algorithm can not be applied! */ - pConcealmentInfo->concealState = ConcealState_FadeOut; - } else { - /* change to state MUTE */ - pConcealmentInfo->concealState = ConcealState_Mute; - } - pConcealmentInfo->cntFadeFrames = 0; - pConcealmentInfo->cntValidFrames = 0; - } - break; - - case ConcealState_Single: - pConcealmentInfo->concealState = ConcealState_Ok; - break; - - case ConcealState_FadeOut: - pConcealmentInfo->cntFadeFrames += 1; - - if (pConcealmentInfo->cntValidFrames > pConcealCommonData->numMuteReleaseFrames) { - if (pConcealCommonData->numFadeInFrames > 0) { - /* change to state FADE-IN */ - pConcealmentInfo->concealState = ConcealState_FadeIn; - pConcealmentInfo->cntFadeFrames = findEquiFadeFrame( pConcealCommonData, - pConcealmentInfo->cntFadeFrames-1, - 0 /* FadeOut -> FadeIn */); - } else { - /* change to state OK */ - pConcealmentInfo->concealState = ConcealState_Ok; - } - } else { - if (pConcealmentInfo->cntFadeFrames >= pConcealCommonData->numFadeOutFrames) { - /* change to state MUTE */ - pConcealmentInfo->concealState = ConcealState_Mute; - } - } - break; - - case ConcealState_Mute: - if (pConcealmentInfo->cntValidFrames > pConcealCommonData->numMuteReleaseFrames) { - if (pConcealCommonData->numFadeInFrames > 0) { - /* change to state FADE-IN */ - pConcealmentInfo->concealState = ConcealState_FadeIn; - pConcealmentInfo->cntFadeFrames = pConcealCommonData->numFadeInFrames - 1; - } else { - /* change to state OK */ - pConcealmentInfo->concealState = ConcealState_Ok; - } - } - break; - - case ConcealState_FadeIn: - pConcealmentInfo->cntFadeFrames -= 1; /* used to address the fade-in factors */ - - if (frameOk || pConcealmentInfo->prevFrameOk[1]) { - if (pConcealmentInfo->cntFadeFrames < 0) { - /* change to state OK */ - pConcealmentInfo->concealState = ConcealState_Ok; - } - } else { - if (pConcealCommonData->numFadeOutFrames > 0) { - /* change to state FADE-OUT */ - pConcealmentInfo->concealState = ConcealState_FadeOut; - pConcealmentInfo->cntFadeFrames = findEquiFadeFrame( pConcealCommonData, - pConcealmentInfo->cntFadeFrames+1, - 1 /* FadeIn -> FadeOut */); - } else { - /* change to state MUTE */ - pConcealmentInfo->concealState = ConcealState_Mute; - } - } - break; - } /* End switch(pConcealmentInfo->concealState) */ - } - break; - - default: - /* Don't need a state machine for other concealment methods. */ - break; - } - -} - - -/*! -\brief Randomizes the sign of the spectral data - - The function toggles the sign of the spectral data randomly. This is - useful to ensure the quality of the concealed frames. - -\return none - */ -static -void CConcealment_ApplyRandomSign (int randomPhase, - FIXP_DBL *spec, - int samplesPerFrame - ) -{ - int i; - USHORT packedSign=0; - - /* random table 512x16bit has been reduced to 512 packed sign bits = 32x16 bit */ - - /* read current packed sign word */ - packedSign = randomSign[randomPhase>>4]; - packedSign >>= (randomPhase&0xf); - - for (i = 0; i < samplesPerFrame ; i++) { - if ((randomPhase & 0xf) == 0) { - packedSign = randomSign[randomPhase>>4]; - } - - if (packedSign & 0x1) { - spec[i] = -spec[i]; - } - packedSign >>= 1; - - randomPhase = (randomPhase + 1) & (AAC_NF_NO_RANDOM_VAL - 1); - } -} - - -/*! - \brief Get fadeing factor for current concealment state. - - The function returns the factor used for fading that belongs to the current internal state. - - \return Fade factor - */ -FIXP_DBL - CConcealment_GetFadeFactor ( - CConcealmentInfo *hConcealmentInfo, - const int fPreviousFactor - ) -{ - FIXP_DBL fac = (FIXP_DBL)0; - - CConcealParams *pConcealCommonData = hConcealmentInfo->pConcealParams; - - if (hConcealmentInfo->pConcealParams->method > ConcealMethodMute) { - switch (hConcealmentInfo->concealState) { - default: - case ConcealState_Mute: - /* Nothing to do here */ - break; - case ConcealState_Ok: - fac = (FIXP_DBL)MAXVAL_DBL; - break; - case ConcealState_Single: - case ConcealState_FadeOut: - { - int idx = hConcealmentInfo->cntFadeFrames - ((fPreviousFactor != 0) ? 1 : 0); - fac = (idx < 0) ? (FIXP_DBL)MAXVAL_DBL : FX_SGL2FX_DBL(pConcealCommonData->fadeOutFactor[idx]); - } - break; - case ConcealState_FadeIn: - { - int idx = hConcealmentInfo->cntFadeFrames + ((fPreviousFactor != 0) ? 1 : 0); - fac = (idx >= hConcealmentInfo->pConcealParams->numFadeInFrames) ? (FIXP_DBL)0 : FX_SGL2FX_DBL(pConcealCommonData->fadeInFactor[idx]); - } - break; - } - } - - return (fac); -} - - -/*! - \brief Get fadeing factor for current concealment state. - - The function returns the state (ok or not) of the previous frame. - If called before the function CConcealment_Apply() set the fBeforeApply - flag to get the correct value. - - \return Frame OK flag of previous frame. - */ -int - CConcealment_GetLastFrameOk ( - CConcealmentInfo *hConcealmentInfo, - const int fBeforeApply - ) -{ - int prevFrameOk = 1; - - if (hConcealmentInfo != NULL) { - prevFrameOk = hConcealmentInfo->prevFrameOk[fBeforeApply & 0x1]; - } - - return prevFrameOk; -} - -/*! - \brief Get the number of delay frames introduced by concealment technique. - - \return Number of delay frames. - */ -UINT - CConcealment_GetDelay ( - CConcealParams *pConcealCommonData - ) -{ - UINT frameDelay = 0; - - if (pConcealCommonData != NULL) { - switch (pConcealCommonData->method) { - case ConcealMethodTonal: - case ConcealMethodInter: - frameDelay = 1; - break; - default: - break; - } - } - - return frameDelay; -} - |