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Diffstat (limited to 'libAACdec/src/aacdec_drc.cpp')
| -rw-r--r-- | libAACdec/src/aacdec_drc.cpp | 1114 |
1 files changed, 0 insertions, 1114 deletions
diff --git a/libAACdec/src/aacdec_drc.cpp b/libAACdec/src/aacdec_drc.cpp deleted file mode 100644 index 2666454..0000000 --- a/libAACdec/src/aacdec_drc.cpp +++ /dev/null @@ -1,1114 +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): Christian Griebel - Description: Dynamic range control (DRC) decoder tool for AAC - -******************************************************************************/ - -#include "aacdec_drc.h" - - -#include "channelinfo.h" -#include "aac_rom.h" - - #include "sbrdecoder.h" - -/* - * Dynamic Range Control - */ - -/* For parameter conversion */ -#define DRC_PARAMETER_BITS ( 7 ) -#define DRC_MAX_QUANT_STEPS ( 1<<DRC_PARAMETER_BITS ) -#define DRC_MAX_QUANT_FACTOR ( DRC_MAX_QUANT_STEPS-1 ) -#define DRC_PARAM_QUANT_STEP ( FL2FXCONST_DBL(1.0f/(float)DRC_MAX_QUANT_FACTOR) ) -#define DRC_PARAM_SCALE ( 1 ) - -#define MAX_REFERENCE_LEVEL ( 127 ) - - #define DVB_ANC_DATA_SYNC_BYTE ( 0xBC ) /* DVB ancillary data sync byte. */ - -/*! - \brief Initialize DRC information - - \self Handle of DRC info - - \return none -*/ -void aacDecoder_drcInit ( - HANDLE_AAC_DRC self ) -{ - CDrcParams *pParams; - - if (self == NULL) { - return; - } - - /* init control fields */ - self->enable = 0; - self->numThreads = 0; - self->digitalNorm = 0; - - /* init params */ - pParams = &self->params; - pParams->bsDelayEnable = 0; - pParams->cut = FL2FXCONST_DBL(0.0f); - pParams->usrCut = FL2FXCONST_DBL(0.0f); - pParams->boost = FL2FXCONST_DBL(0.0f); - pParams->usrBoost = FL2FXCONST_DBL(0.0f); - pParams->targetRefLevel = AACDEC_DRC_DEFAULT_REF_LEVEL; - pParams->expiryFrame = AACDEC_DRC_DFLT_EXPIRY_FRAMES; - pParams->applyHeavyCompression = 0; - - /* initial program ref level = target ref level */ - self->progRefLevel = pParams->targetRefLevel; -} - - -/*! - \brief Initialize DRC control data for one channel - - \self Handle of DRC info - - \return none -*/ -void aacDecoder_drcInitChannelData ( - CDrcChannelData *pDrcChData ) -{ - if (pDrcChData != NULL) { - pDrcChData->expiryCount = 0; - pDrcChData->numBands = 1; - pDrcChData->bandTop[0] = (1024 >> 2) - 1; - pDrcChData->drcValue[0] = 0; - pDrcChData->drcInterpolationScheme = 0; - pDrcChData->drcDataType = UNKNOWN_PAYLOAD; - } -} - - -/*! - \brief Set one single DRC parameter - - \self Handle of DRC info. - \param Parameter to be set. - \value Value to be set. - - \return an error code. -*/ -AAC_DECODER_ERROR aacDecoder_drcSetParam ( - HANDLE_AAC_DRC self, - AACDEC_DRC_PARAM param, - INT value ) -{ - AAC_DECODER_ERROR ErrorStatus = AAC_DEC_OK; - - switch (param) - { - case DRC_CUT_SCALE: - /* set attenuation scale factor */ - if ( (value < 0) - || (value > DRC_MAX_QUANT_FACTOR) ) { - return AAC_DEC_SET_PARAM_FAIL; - } - if (self == NULL) { - return AAC_DEC_INVALID_HANDLE; - } - self->params.usrCut = (FIXP_DBL)((INT)(DRC_PARAM_QUANT_STEP>>DRC_PARAM_SCALE) * (INT)value); - if (self->params.applyHeavyCompression == 0) - self->params.cut = self->params.usrCut; - break; - case DRC_BOOST_SCALE: - /* set boost factor */ - if ( (value < 0) - || (value > DRC_MAX_QUANT_FACTOR) ) { - return AAC_DEC_SET_PARAM_FAIL; - } - if (self == NULL) { - return AAC_DEC_INVALID_HANDLE; - } - self->params.usrBoost = (FIXP_DBL)((INT)(DRC_PARAM_QUANT_STEP>>DRC_PARAM_SCALE) * (INT)value); - if (self->params.applyHeavyCompression == 0) - self->params.boost = self->params.usrBoost; - break; - case TARGET_REF_LEVEL: - if ( value > MAX_REFERENCE_LEVEL - || value < -MAX_REFERENCE_LEVEL ) { - return AAC_DEC_SET_PARAM_FAIL; - } - if (self == NULL) { - return AAC_DEC_INVALID_HANDLE; - } - if (value < 0) { - self->digitalNorm = 0; - } - else { - /* ref_level must be between 0 and MAX_REFERENCE_LEVEL, inclusive */ - self->digitalNorm = 1; - if (self->params.targetRefLevel != (SCHAR)value) { - self->params.targetRefLevel = (SCHAR)value; - self->progRefLevel = (SCHAR)value; /* Always set the program reference level equal to the - target level according to 4.5.2.7.3 of ISO/IEC 14496-3. */ - } - } - break; - case APPLY_HEAVY_COMPRESSION: - if (value < 0 || value > 1) { - return AAC_DEC_SET_PARAM_FAIL; - } - if (self == NULL) { - return AAC_DEC_INVALID_HANDLE; - } - if (self->params.applyHeavyCompression != (UCHAR)value) { - if (value == 1) { - /* Disable scaling of DRC values by setting the max values */ - self->params.boost = FL2FXCONST_DBL(1.0f/(float)(1<<DRC_PARAM_SCALE)); - self->params.cut = FL2FXCONST_DBL(1.0f/(float)(1<<DRC_PARAM_SCALE)); - } else { - /* Restore the user params */ - self->params.boost = self->params.usrBoost; - self->params.cut = self->params.usrCut; - } - /* Store new parameter value */ - self->params.applyHeavyCompression = (UCHAR)value; - } - break; - case DRC_BS_DELAY: - if (value < 0 || value > 1) { - return AAC_DEC_SET_PARAM_FAIL; - } - if (self == NULL) { - return AAC_DEC_INVALID_HANDLE; - } - self->params.bsDelayEnable = value; - break; - case DRC_DATA_EXPIRY_FRAME: - if (self == NULL) { - return AAC_DEC_INVALID_HANDLE; - } - self->params.expiryFrame = (UINT)value; - break; - default: - return AAC_DEC_SET_PARAM_FAIL; - } /* switch(param) */ - - /* switch on/off processing */ - self->enable = ( (self->params.boost > (FIXP_DBL)0) - || (self->params.cut > (FIXP_DBL)0) - || (self->params.applyHeavyCompression != 0) - || (self->digitalNorm == 1) ); - - - return ErrorStatus; -} - - -static int parseExcludedChannels( UINT *excludedChnsMask, - HANDLE_FDK_BITSTREAM bs ) -{ - UINT excludeMask = 0; - UINT i, j; - int bitCnt = 9; - - for (i = 0, j = 1; i < 7; i++, j<<=1) { - if (FDKreadBits(bs,1)) { - excludeMask |= j; - } - } - - /* additional_excluded_chns */ - while (FDKreadBits(bs,1)) { - for (i = 0; i < 7; i++, j<<=1) { - if (FDKreadBits(bs,1)) { - excludeMask |= j; - } - } - bitCnt += 9; - FDK_ASSERT(j < (UINT)-1); - } - - *excludedChnsMask = excludeMask; - - return (bitCnt); -} - - -/*! - \brief Save DRC payload bitstream position - - \self Handle of DRC info - \bs Handle of FDK bitstream - - \return The number of DRC payload bits -*/ -int aacDecoder_drcMarkPayload ( - HANDLE_AAC_DRC self, - HANDLE_FDK_BITSTREAM bs, - AACDEC_DRC_PAYLOAD_TYPE type ) -{ - UINT bsStartPos; - int i, numBands = 1, bitCnt = 0; - - if (self == NULL) { - return 0; - } - - bsStartPos = FDKgetValidBits(bs); - - switch (type) { - case MPEG_DRC_EXT_DATA: - { - bitCnt = 4; - - if (FDKreadBits(bs,1)) { /* pce_tag_present */ - FDKreadBits(bs,8); /* pce_instance_tag + drc_tag_reserved_bits */ - bitCnt+=8; - } - - if (FDKreadBits(bs,1)) { /* excluded_chns_present */ - FDKreadBits(bs,7); /* exclude mask [0..7] */ - bitCnt+=8; - while (FDKreadBits(bs,1)) { /* additional_excluded_chns */ - FDKreadBits(bs,7); /* exclude mask [x..y] */ - bitCnt+=8; - } - } - - if (FDKreadBits(bs,1)) { /* drc_bands_present */ - numBands += FDKreadBits(bs, 4); /* drc_band_incr */ - FDKreadBits(bs,4); /* reserved */ - bitCnt+=8; - for (i = 0; i < numBands; i++) { - FDKreadBits(bs,8); /* drc_band_top[i] */ - bitCnt+=8; - } - } - - if (FDKreadBits(bs,1)) { /* prog_ref_level_present */ - FDKreadBits(bs,8); /* prog_ref_level + prog_ref_level_reserved_bits */ - bitCnt+=8; - } - - for (i = 0; i < numBands; i++) { - FDKreadBits(bs,8); /* dyn_rng_sgn[i] + dyn_rng_ctl[i] */ - bitCnt+=8; - } - - if ( (self->numPayloads < MAX_DRC_THREADS) - && ((INT)FDKgetValidBits(bs) >= 0) ) - { - self->drcPayloadPosition[self->numPayloads++] = bsStartPos; - } - } - break; - - case DVB_DRC_ANC_DATA: - bitCnt += 8; - /* check sync word */ - if (FDKreadBits(bs, 8) == DVB_ANC_DATA_SYNC_BYTE) - { - int dmxLevelsPresent, compressionPresent; - int coarseGrainTcPresent, fineGrainTcPresent; - - /* bs_info field */ - FDKreadBits(bs, 8); /* mpeg_audio_type, dolby_surround_mode, presentation_mode */ - bitCnt+=8; - - /* Evaluate ancillary_data_status */ - FDKreadBits(bs, 3); /* reserved, set to 0 */ - dmxLevelsPresent = FDKreadBits(bs, 1); /* downmixing_levels_MPEG4_status */ - FDKreadBits(bs, 1); /* reserved, set to 0 */ - compressionPresent = FDKreadBits(bs, 1); /* audio_coding_mode_and_compression status */ - coarseGrainTcPresent = FDKreadBits(bs, 1); /* coarse_grain_timecode_status */ - fineGrainTcPresent = FDKreadBits(bs, 1); /* fine_grain_timecode_status */ - bitCnt+=8; - - /* MPEG4 downmixing levels */ - if (dmxLevelsPresent) { - FDKreadBits(bs, 8); /* downmixing_levels_MPEG4 */ - bitCnt+=8; - } - /* audio coding mode and compression status */ - if (compressionPresent) { - FDKreadBits(bs, 16); /* audio_coding_mode, Compression_value */ - bitCnt+=16; - } - /* coarse grain timecode */ - if (coarseGrainTcPresent) { - FDKreadBits(bs, 16); /* coarse_grain_timecode */ - bitCnt+=16; - } - /* fine grain timecode */ - if (fineGrainTcPresent) { - FDKreadBits(bs, 16); /* fine_grain_timecode */ - bitCnt+=16; - } - if ( !self->dvbAncDataAvailable - && ((INT)FDKgetValidBits(bs) >= 0) ) - { - self->dvbAncDataPosition = bsStartPos; - self->dvbAncDataAvailable = 1; - } - } - break; - - default: - break; - } - - return (bitCnt); -} - - -/*! - \brief Parse DRC parameters from bitstream - - \bs Handle of FDK bitstream (in) - \pDrcBs Pointer to DRC payload data container (out) - \payloadPosition Bitstream position of MPEG DRC data junk (in) - - \return Number of bits read (0 in case of a parse error) -*/ -static int aacDecoder_drcParse ( - HANDLE_FDK_BITSTREAM bs, - CDrcPayload *pDrcBs, - UINT payloadPosition ) -{ - int i, numBands, bitCnt = 4; - - /* Move to the beginning of the DRC payload field */ - FDKpushBiDirectional(bs, FDKgetValidBits(bs)-payloadPosition); - - /* pce_tag_present */ - if (FDKreadBits(bs,1)) - { - pDrcBs->pceInstanceTag = FDKreadBits(bs, 4); /* pce_instance_tag */ - /* only one program supported */ - FDKreadBits(bs, 4); /* drc_tag_reserved_bits */ - bitCnt += 8; - } else { - pDrcBs->pceInstanceTag = -1; /* not present */ - } - - if (FDKreadBits(bs,1)) { /* excluded_chns_present */ - /* get excluded_chn_mask */ - bitCnt += parseExcludedChannels(&pDrcBs->excludedChnsMask, bs); - } else { - pDrcBs->excludedChnsMask = 0; - } - - numBands = 1; - if (FDKreadBits(bs,1)) /* drc_bands_present */ - { - /* get band_incr */ - numBands += FDKreadBits(bs, 4); /* drc_band_incr */ - pDrcBs->channelData.drcInterpolationScheme = FDKreadBits(bs, 4); /* drc_interpolation_scheme */ - bitCnt += 8; - /* band_top */ - for (i = 0; i < numBands; i++) - { - pDrcBs->channelData.bandTop[i] = FDKreadBits(bs, 8); /* drc_band_top[i] */ - bitCnt += 8; - } - } - else { - pDrcBs->channelData.bandTop[0] = (1024 >> 2) - 1; /* ... comprising the whole spectrum. */; - } - - pDrcBs->channelData.numBands = numBands; - - if (FDKreadBits(bs,1)) /* prog_ref_level_present */ - { - pDrcBs->progRefLevel = FDKreadBits(bs, 7); /* prog_ref_level */ - FDKreadBits(bs, 1); /* prog_ref_level_reserved_bits */ - bitCnt += 8; - } else { - pDrcBs->progRefLevel = -1; - } - - for (i = 0; i < numBands; i++) - { - pDrcBs->channelData.drcValue[i] = FDKreadBits(bs, 1) << 7; /* dyn_rng_sgn[i] */ - pDrcBs->channelData.drcValue[i] |= FDKreadBits(bs, 7) & 0x7F; /* dyn_rng_ctl[i] */ - bitCnt += 8; - } - - /* Set DRC payload type */ - pDrcBs->channelData.drcDataType = MPEG_DRC_EXT_DATA; - - return (bitCnt); -} - - -/*! - \brief Parse heavy compression value transported in DSEs of DVB streams with MPEG-4 content. - - \bs Handle of FDK bitstream (in) - \pDrcBs Pointer to DRC payload data container (out) - \payloadPosition Bitstream position of DVB ancillary data junk - - \return Number of bits read (0 in case of a parse error) -*/ -#define DVB_COMPRESSION_SCALE ( 8 ) /* 48,164 dB */ - -static int aacDecoder_drcReadCompression ( - HANDLE_FDK_BITSTREAM bs, - CDrcPayload *pDrcBs, - UINT payloadPosition ) -{ - int bitCnt = 0; - int dmxLevelsPresent, compressionPresent; - int coarseGrainTcPresent, fineGrainTcPresent; - - /* Move to the beginning of the DRC payload field */ - FDKpushBiDirectional(bs, FDKgetValidBits(bs)-payloadPosition); - - /* Sanity checks */ - if ( FDKgetValidBits(bs) < 24 ) { - return 0; - } - - /* Check sync word */ - if (FDKreadBits(bs, 8) != DVB_ANC_DATA_SYNC_BYTE) { - return 0; - } - - /* Evaluate bs_info field */ - if (FDKreadBits(bs, 2) != 3) { /* mpeg_audio_type */ - /* No MPEG-4 audio data */ - return 0; - } - FDKreadBits(bs, 2); /* dolby_surround_mode */ - FDKreadBits(bs, 2); /* presentation_mode */ - if (FDKreadBits(bs, 2) != 0) { /* reserved, set to 0 */ - return 0; - } - - /* Evaluate ancillary_data_status */ - if (FDKreadBits(bs, 3) != 0) { /* reserved, set to 0 */ - return 0; - } - dmxLevelsPresent = FDKreadBits(bs, 1); /* downmixing_levels_MPEG4_status */ - if (FDKreadBits(bs, 1) != 0) { /* reserved, set to 0 */ - return 0; - } - compressionPresent = FDKreadBits(bs, 1); /* audio_coding_mode_and_compression status */ - coarseGrainTcPresent = FDKreadBits(bs, 1); /* coarse_grain_timecode_status */ - fineGrainTcPresent = FDKreadBits(bs, 1); /* fine_grain_timecode_status */ - bitCnt += 24; - - if (dmxLevelsPresent) { - FDKreadBits(bs, 8); /* downmixing_levels_MPEG4 */ - bitCnt += 8; - } - - /* audio_coding_mode_and_compression_status */ - if (compressionPresent) - { - UCHAR compressionOn, compressionValue; - - /* audio_coding_mode */ - if ( FDKreadBits(bs, 7) != 0 ) { /* The reserved bits shall be set to "0". */ - return 0; - } - compressionOn = (UCHAR)FDKreadBits(bs, 1); /* compression_on */ - compressionValue = (UCHAR)FDKreadBits(bs, 8); /* Compression_value */ - bitCnt += 16; - - if ( compressionOn ) { - /* A compression value is available so store the data just like MPEG DRC data */ - pDrcBs->channelData.numBands = 1; /* One band ... */ - pDrcBs->channelData.drcValue[0] = compressionValue; /* ... with one value ... */ - pDrcBs->channelData.bandTop[0] = (1024 >> 2) - 1; /* ... comprising the whole spectrum. */ - pDrcBs->pceInstanceTag = -1; /* Not present */ - pDrcBs->progRefLevel = -1; /* Not present */ - pDrcBs->channelData.drcDataType = DVB_DRC_ANC_DATA; /* Set DRC payload type to DVB. */ - } else { - /* No compression value available */ - /* CAUTION: It is not clearly defined by standard how to react in this situation. */ - /* Turn down the compression value to aprox. 0dB */ - pDrcBs->channelData.numBands = 1; /* One band ... */ - pDrcBs->channelData.drcValue[0] = 0x80; /* ... with aprox. 0dB ... */ - pDrcBs->channelData.bandTop[0] = (1024 >> 2) - 1; /* ... comprising the whole spectrum. */ - pDrcBs->channelData.drcDataType = DVB_DRC_ANC_DATA; /* Set DRC payload type to DVB. */ - - /* If compression_on field is set to "0" the compression_value field shall be "0000 0000". */ - if (compressionValue != 0) { - return 0; - } - } - } - - /* Read timecodes if available just to get the right amount of bits. */ - if (coarseGrainTcPresent) { - FDKreadBits(bs, 16); /* coarse_grain_timecode */ - bitCnt += 16; - } - if (fineGrainTcPresent) { - FDKreadBits(bs, 16); /* fine_grain_timecode */ - bitCnt += 16; - } - - return (bitCnt); -} - - -/* - * Prepare DRC processing - */ -static int aacDecoder_drcExtractAndMap ( - HANDLE_AAC_DRC self, - HANDLE_FDK_BITSTREAM hBs, - CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[], - UCHAR pceInstanceTag, - UCHAR channelMapping[], /* Channel mapping translating drcChannel index to canonical channel index */ - int validChannels ) -{ - CDrcPayload threadBs[MAX_DRC_THREADS]; - CDrcPayload *validThreadBs[MAX_DRC_THREADS]; - CDrcParams *pParams; - UINT backupBsPosition; - int i, thread, validThreads = 0; - int numExcludedChns[MAX_DRC_THREADS]; - - FDK_ASSERT(self != NULL); - FDK_ASSERT(hBs != NULL); - FDK_ASSERT(pAacDecoderStaticChannelInfo != NULL); - - pParams = &self->params; - - self->numThreads = 0; - backupBsPosition = FDKgetValidBits(hBs); - - for (i = 0; i < self->numPayloads && self->numThreads < MAX_DRC_THREADS; i++) { - int bitsParsed; - - /* Init payload data chunk. The memclear is very important because it initializes - the most values. Without it the module wouldn't work properly or crash. */ - FDKmemclear(&threadBs[self->numThreads], sizeof(CDrcPayload)); - threadBs[self->numThreads].channelData.bandTop[0] = (1024 >> 2) - 1; - - /* Extract payload */ - bitsParsed = aacDecoder_drcParse( hBs, - &threadBs[self->numThreads], - self->drcPayloadPosition[i] ); - if (bitsParsed > 0) { - self->numThreads++; - } - } - self->numPayloads = 0; - - if (self->dvbAncDataAvailable) - { /* Append a DVB heavy compression payload thread if available. */ - int bitsParsed; - - /* Init payload data chunk. The memclear is very important because it initializes - the most values. Without it the module wouldn't work properly or crash. */ - FDKmemclear(&threadBs[self->numThreads], sizeof(CDrcPayload)); - threadBs[self->numThreads].channelData.bandTop[0] = (1024 >> 2) - 1; - - /* Extract payload */ - bitsParsed = aacDecoder_drcReadCompression( hBs, - &threadBs[self->numThreads], - self->dvbAncDataPosition ); - if (bitsParsed > 0) { - self->numThreads++; - } - } - self->dvbAncDataAvailable = 0; - - /* Reset the bitbufffer */ - FDKpushBiDirectional(hBs, FDKgetValidBits(hBs) - backupBsPosition); - - /* calculate number of valid bits in excl_chn_mask */ - - /* coupling channels not supported */ - - /* check for valid threads */ - for (thread = 0; thread < self->numThreads; thread++) { - CDrcPayload *pThreadBs = &threadBs[thread]; - int numExclChns = 0; - - switch ((AACDEC_DRC_PAYLOAD_TYPE)pThreadBs->channelData.drcDataType) { - default: - continue; - case MPEG_DRC_EXT_DATA: - case DVB_DRC_ANC_DATA: - break; - } - - if (pThreadBs->pceInstanceTag >= 0) { /* if PCE tag present */ - if (pThreadBs->pceInstanceTag != pceInstanceTag) { - continue; /* don't accept */ - } - } - - /* calculate number of excluded channels */ - if (pThreadBs->excludedChnsMask > 0) { - INT exclMask = pThreadBs->excludedChnsMask; - int ch; - for (ch = 0; ch < validChannels; ch++) { - numExclChns += exclMask & 0x1; - exclMask >>= 1; - } - } - if (numExclChns < validChannels) { - validThreadBs[validThreads] = pThreadBs; - numExcludedChns[validThreads] = numExclChns; - validThreads++; - } - } - - if (validThreads > 1) { - int ch; - - /* check consistency of excl_chn_mask amongst valid DRC threads */ - for (ch = 0; ch < validChannels; ch++) { - int present = 0; - - for (thread = 0; thread < validThreads; thread++) { - CDrcPayload *pThreadBs = validThreadBs[thread]; - - - /* thread applies to this channel */ - if ( (pThreadBs->channelData.drcDataType == MPEG_DRC_EXT_DATA) - && ( (numExcludedChns[thread] == 0) - || (!(pThreadBs->excludedChnsMask & (1<<ch))) ) ) { - present++; - } - } - - - if (present > 1) { - return -1; - } - } - } - - /* map DRC bitstream information onto DRC channel information */ - for (thread = 0; thread < validThreads; thread++) - { - CDrcPayload *pThreadBs = validThreadBs[thread]; - INT exclMask = pThreadBs->excludedChnsMask; - AACDEC_DRC_PAYLOAD_TYPE drcPayloadType = (AACDEC_DRC_PAYLOAD_TYPE)pThreadBs->channelData.drcDataType; - int ch; - - /* last progRefLevel transmitted is the one that is used - * (but it should really only be transmitted once per block!) - */ - if (pThreadBs->progRefLevel >= 0) { - self->progRefLevel = pThreadBs->progRefLevel; - self->prlExpiryCount = 0; /* Got a new value -> Reset counter */ - } - - /* SCE, CPE and LFE */ - for (ch = 0; ch < validChannels; ch++) { - int mapedChannel = channelMapping[ch]; - - if ( ((exclMask & (1<<mapedChannel)) == 0) - && ( (drcPayloadType == MPEG_DRC_EXT_DATA) - || ((drcPayloadType == DVB_DRC_ANC_DATA) && self->params.applyHeavyCompression) - ) ) { - /* copy thread to channel */ - pAacDecoderStaticChannelInfo[ch]->drcData = pThreadBs->channelData; - } - } - /* CCEs not supported by now */ - } - - /* Increment and check expiry counter for the program reference level: */ - if ( (pParams->expiryFrame > 0) - && (self->prlExpiryCount++ > pParams->expiryFrame) ) - { /* The program reference level is too old, so set it back to the target level. */ - self->progRefLevel = pParams->targetRefLevel; - self->prlExpiryCount = 0; - } - - return 0; -} - - -void aacDecoder_drcApply ( - HANDLE_AAC_DRC self, - void *pSbrDec, - CAacDecoderChannelInfo *pAacDecoderChannelInfo, - CDrcChannelData *pDrcChData, - int ch, /* needed only for SBR */ - int aacFrameSize, - int bSbrPresent ) -{ - int band, top, bin, numBands; - int bottom = 0; - int modifyBins = 0; - - FIXP_DBL max_mantissa; - INT max_exponent; - - FIXP_DBL norm_mantissa = FL2FXCONST_DBL(0.0f); - INT norm_exponent = 0; - - FIXP_DBL fact_mantissa[MAX_DRC_BANDS]; - INT fact_exponent[MAX_DRC_BANDS]; - - CDrcParams *pParams = &self->params; - - FIXP_DBL *pSpectralCoefficient = SPEC_LONG(pAacDecoderChannelInfo->pSpectralCoefficient); - CIcsInfo *pIcsInfo = &pAacDecoderChannelInfo->icsInfo; - SHORT *pSpecScale = pAacDecoderChannelInfo->specScale; - - int winSeq = pIcsInfo->WindowSequence; - - /* Increment and check expiry counter */ - if ( (pParams->expiryFrame > 0) - && (++pDrcChData->expiryCount > pParams->expiryFrame) ) - { /* The DRC data is too old, so delete it. */ - aacDecoder_drcInitChannelData( pDrcChData ); - } - - if (!self->enable) { - sbrDecoder_drcDisable( (HANDLE_SBRDECODER)pSbrDec, ch ); - return; - } - - numBands = pDrcChData->numBands; - top = FDKmax(0, numBands-1); - - pDrcChData->bandTop[0] = fixMin(pDrcChData->bandTop[0], (aacFrameSize >> 2) - 1); - - /* If program reference normalization is done in the digital domain, - modify factor to perform normalization. prog_ref_level can - alternatively be passed to the system for modification of the level in - the analog domain. Analog level modification avoids problems with - reduced DAC SNR (if signal is attenuated) or clipping (if signal is - boosted) */ - - if (self->digitalNorm == 1) - { - /* 0.5^((targetRefLevel - progRefLevel)/24) */ - norm_mantissa = fLdPow( - FL2FXCONST_DBL(-1.0), /* log2(0.5) */ - 0, - (FIXP_DBL)((INT)(FL2FXCONST_DBL(1.0f/24.0)>>3) * (INT)(pParams->targetRefLevel-self->progRefLevel)), - 3, - &norm_exponent ); - } - else { - norm_mantissa = FL2FXCONST_DBL(0.5f); - norm_exponent = 1; - } - - - /* calc scale factors */ - for (band = 0; band < numBands; band++) - { - UCHAR drcVal = pDrcChData->drcValue[band]; - top = fixMin((int)( (pDrcChData->bandTop[band]+1)<<2 ), aacFrameSize); - - fact_mantissa[band] = FL2FXCONST_DBL(0.5f); - fact_exponent[band] = 1; - - if ( pParams->applyHeavyCompression - && ((AACDEC_DRC_PAYLOAD_TYPE)pDrcChData->drcDataType == DVB_DRC_ANC_DATA) ) - { - INT compressionFactorVal_e; - int valX, valY; - - valX = drcVal >> 4; - valY = drcVal & 0x0F; - - /* calculate the unscaled heavy compression factor. - compressionFactor = 48.164 - 6.0206*valX - 0.4014*valY dB - range: -48.166 dB to 48.164 dB */ - if ( drcVal != 0x7F ) { - fact_mantissa[band] = - fPowInt( FL2FXCONST_DBL(0.95483867181), /* -0.4014dB = 0.95483867181 */ - 0, - valY, - &compressionFactorVal_e ); - - /* -0.0008dB (48.164 - 6.0206*8 = -0.0008) */ - fact_mantissa[band] = fMult(FL2FXCONST_DBL(0.99990790084), fact_mantissa[band]); - - fact_exponent[band] = DVB_COMPRESSION_SCALE - valX + compressionFactorVal_e; - } - } else - if ((AACDEC_DRC_PAYLOAD_TYPE)pDrcChData->drcDataType == MPEG_DRC_EXT_DATA) - { - /* apply the scaled dynamic range control words to factor. - * if scaling drc_cut (or drc_boost), or control word drc_mantissa is 0 - * then there is no dynamic range compression - * - * if pDrcChData->drcSgn[band] is - * 1 then gain is < 1 : factor = 2^(-self->cut * pDrcChData->drcMag[band] / 24) - * 0 then gain is > 1 : factor = 2^( self->boost * pDrcChData->drcMag[band] / 24) - */ - - if ((drcVal&0x7F) > 0) { - FIXP_DBL tParamVal = (drcVal & 0x80) ? -pParams->cut : pParams->boost; - - fact_mantissa[band] = - f2Pow( (FIXP_DBL)((INT)fMult(FL2FXCONST_DBL(1.0f/192.0f), tParamVal) * (drcVal&0x7F)), - 3+DRC_PARAM_SCALE, - &fact_exponent[band] ); - } - } - - fact_mantissa[band] = fMult(fact_mantissa[band], norm_mantissa); - fact_exponent[band] += norm_exponent; - - - bottom = top; - - } /* end loop over bands */ - - - /* normalizations */ - { - int res; - - max_mantissa = FL2FXCONST_DBL(0.0f); - max_exponent = 0; - for (band = 0; band < numBands; band++) { - max_mantissa = fixMax(max_mantissa, fact_mantissa[band]); - max_exponent = fixMax(max_exponent, fact_exponent[band]); - } - - /* left shift factors to gain accurancy */ - res = CntLeadingZeros(max_mantissa) - 1; - - /* above topmost DRC band gain factor is 1 */ - if (((pDrcChData->bandTop[numBands-1]+1)<<2) < aacFrameSize) res = 0; - - if (res > 0) { - res = fixMin(res, max_exponent); - max_exponent -= res; - - for (band = 0; band < numBands; band++) { - fact_mantissa[band] <<= res; - fact_exponent[band] -= res; - } - } - - /* normalize magnitudes to one scale factor */ - for (band = 0; band < numBands; band++) { - if (fact_exponent[band] < max_exponent) { - fact_mantissa[band] >>= max_exponent - fact_exponent[band]; - } - if (fact_mantissa[band] != FL2FXCONST_DBL(0.5f)) { - modifyBins = 1; - } - } - if (max_exponent != 1) { - modifyBins = 1; - } - } - - /* apply factor to spectral lines - * short blocks must take care that bands fall on - * block boundaries! - */ - if (!bSbrPresent) - { - bottom = 0; - - if (!modifyBins) { - /* We don't have to modify the spectral bins because the fractional part of all factors is 0.5. - In order to keep accurancy we don't apply the factor but decrease the exponent instead. */ - max_exponent -= 1; - } else - { - for (band = 0; band < numBands; band++) - { - top = fixMin((int)( (pDrcChData->bandTop[band]+1)<<2 ), aacFrameSize); /* ... * DRC_BAND_MULT; */ - - for (bin = bottom; bin < top; bin++) { - pSpectralCoefficient[bin] = fMult(pSpectralCoefficient[bin], fact_mantissa[band]); - } - - bottom = top; - } - } - - /* above topmost DRC band gain factor is 1 */ - if (max_exponent > 0) { - for (bin = bottom; bin < aacFrameSize; bin+=1) { - pSpectralCoefficient[bin] >>= max_exponent; - } - } - - /* adjust scaling */ - pSpecScale[0] += max_exponent; - - if (winSeq == EightShortSequence) { - int win; - for (win = 1; win < 8; win++) { - pSpecScale[win] += max_exponent; - } - } - } - else { - HANDLE_SBRDECODER hSbrDecoder = (HANDLE_SBRDECODER)pSbrDec; - UINT numBands = pDrcChData->numBands; - - /* feed factors into SBR decoder for application in QMF domain. */ - sbrDecoder_drcFeedChannel ( - hSbrDecoder, - ch, - numBands, - fact_mantissa, - max_exponent, - pDrcChData->drcInterpolationScheme, - winSeq, - pDrcChData->bandTop - ); - } - - return; -} - - -/* - * Prepare DRC processing - */ -int aacDecoder_drcProlog ( - HANDLE_AAC_DRC self, - HANDLE_FDK_BITSTREAM hBs, - CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[], - UCHAR pceInstanceTag, - UCHAR channelMapping[], /* Channel mapping translating drcChannel index to canonical channel index */ - int validChannels ) -{ - int err = 0; - - if (self == NULL) { - return -1; - } - - if (!self->params.bsDelayEnable) - { - err = aacDecoder_drcExtractAndMap ( - self, - hBs, - pAacDecoderStaticChannelInfo, - pceInstanceTag, - channelMapping, - validChannels ); - } - - return err; -} - - -/* - * Finalize DRC processing - */ -int aacDecoder_drcEpilog ( - HANDLE_AAC_DRC self, - HANDLE_FDK_BITSTREAM hBs, - CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[], - UCHAR pceInstanceTag, - UCHAR channelMapping[], /* Channel mapping translating drcChannel index to canonical channel index */ - int validChannels ) -{ - int err = 0; - - if (self == NULL) { - return -1; - } - - if (self->params.bsDelayEnable) - { - err = aacDecoder_drcExtractAndMap ( - self, - hBs, - pAacDecoderStaticChannelInfo, - pceInstanceTag, - channelMapping, - validChannels ); - } - - return err; -} - |