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Diffstat (limited to 'libAACdec/src/channelinfo.cpp')
| -rw-r--r-- | libAACdec/src/channelinfo.cpp | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/libAACdec/src/channelinfo.cpp b/libAACdec/src/channelinfo.cpp deleted file mode 100644 index 76d5895..0000000 --- a/libAACdec/src/channelinfo.cpp +++ /dev/null @@ -1,276 +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: individual channel stream info - -******************************************************************************/ - -#include "channelinfo.h" -#include "aac_rom.h" -#include "aac_ram.h" -#include "FDK_bitstream.h" - - -AAC_DECODER_ERROR IcsReadMaxSfb ( - HANDLE_FDK_BITSTREAM bs, - CIcsInfo *pIcsInfo, - const SamplingRateInfo *pSamplingRateInfo - ) -{ - AAC_DECODER_ERROR ErrorStatus = AAC_DEC_OK; - int nbits; - - if (IsLongBlock(pIcsInfo)) { - nbits = 6; - pIcsInfo->TotalSfBands = pSamplingRateInfo->NumberOfScaleFactorBands_Long; - } else { - nbits = 4; - pIcsInfo->TotalSfBands = pSamplingRateInfo->NumberOfScaleFactorBands_Short; - } - pIcsInfo->MaxSfBands = (UCHAR) FDKreadBits(bs, nbits); - - if (pIcsInfo->MaxSfBands > pIcsInfo->TotalSfBands){ - ErrorStatus = AAC_DEC_PARSE_ERROR; - } - - return ErrorStatus; -} - - - -AAC_DECODER_ERROR IcsRead(HANDLE_FDK_BITSTREAM bs, - CIcsInfo *pIcsInfo, - const SamplingRateInfo* pSamplingRateInfo, - const UINT flags) -{ - AAC_DECODER_ERROR ErrorStatus = AAC_DEC_OK; - - pIcsInfo->Valid = 0; - - if (flags & AC_ELD){ - pIcsInfo->WindowSequence = OnlyLongSequence; - pIcsInfo->WindowShape = 0; - } - else { - if ( !(flags & (AC_USAC|AC_RSVD50)) ) { - FDKreadBits(bs,1); - } - pIcsInfo->WindowSequence = (UCHAR) FDKreadBits(bs,2); - pIcsInfo->WindowShape = (UCHAR) FDKreadBits(bs,1); - if (flags & AC_LD) { - if (pIcsInfo->WindowShape) { - pIcsInfo->WindowShape = 2; /* select low overlap instead of KBD */ - } - } - } - - /* Sanity check */ - if ( (flags & (AC_ELD|AC_LD)) && pIcsInfo->WindowSequence != OnlyLongSequence) { - pIcsInfo->WindowSequence = OnlyLongSequence; - ErrorStatus = AAC_DEC_PARSE_ERROR; - goto bail; - } - - ErrorStatus = IcsReadMaxSfb(bs, pIcsInfo, pSamplingRateInfo); - if (ErrorStatus != AAC_DEC_OK) { - goto bail; - } - - if (IsLongBlock(pIcsInfo)) - { - if ( !(flags & (AC_ELD|AC_SCALABLE|AC_BSAC|AC_USAC|AC_RSVD50)) ) /* If not ELD nor Scalable nor BSAC nor USAC syntax then ... */ - { - if ((UCHAR)FDKreadBits(bs,1) != 0 ) /* UCHAR PredictorDataPresent */ - { - ErrorStatus = AAC_DEC_UNSUPPORTED_PREDICTION; - goto bail; - } - } - - pIcsInfo->WindowGroups = 1; - pIcsInfo->WindowGroupLength[0] = 1; - } - else - { - INT i; - UINT mask; - - pIcsInfo->ScaleFactorGrouping = (UCHAR) FDKreadBits(bs,7); - - pIcsInfo->WindowGroups = 0 ; - - for (i=0; i < (8-1); i++) - { - mask = 1 << (6 - i); - pIcsInfo->WindowGroupLength[i] = 1; - - if (pIcsInfo->ScaleFactorGrouping & mask) - { - pIcsInfo->WindowGroupLength[pIcsInfo->WindowGroups]++; - } - else - { - pIcsInfo->WindowGroups++; - } - } - - /* loop runs to i < 7 only */ - pIcsInfo->WindowGroupLength[8-1] = 1; - pIcsInfo->WindowGroups++; - } - - -bail: - if (ErrorStatus == AAC_DEC_OK) - pIcsInfo->Valid = 1; - - return ErrorStatus; -} - - -/* - interleave codebooks the following way - - 9 (84w) | 1 (51w) - 10 (82w) | 2 (39w) - SCL (65w) | 4 (38w) - 3 (39w) | 5 (41w) - | 6 (40w) - | 7 (31w) - | 8 (31w) - (270w) (271w) -*/ - - -/* - Table entries are sorted as following: - | num_swb_long_window | sfbands_long | num_swb_short_window | sfbands_short | -*/ -AAC_DECODER_ERROR getSamplingRateInfo( - SamplingRateInfo *t, - UINT samplesPerFrame, - UINT samplingRateIndex, - UINT samplingRate - ) -{ - int index = 0; - - - t->samplingRateIndex = samplingRateIndex; - t->samplingRate = samplingRate; - - switch (samplesPerFrame) { - case 1024: - index = 0; - break; - case 960: - index = 1; - break; - case 512: - index = 3; - break; - case 480: - index = 4; - break; - - default: - return AAC_DEC_UNSUPPORTED_FORMAT; - } - - t->ScaleFactorBands_Long = sfbOffsetTables[index][samplingRateIndex].sfbOffsetLong; - t->ScaleFactorBands_Short = sfbOffsetTables[index][samplingRateIndex].sfbOffsetShort; - t->NumberOfScaleFactorBands_Long = sfbOffsetTables[index][samplingRateIndex].numberOfSfbLong; - t->NumberOfScaleFactorBands_Short = sfbOffsetTables[index][samplingRateIndex].numberOfSfbShort; - - if (t->ScaleFactorBands_Long == NULL || t->NumberOfScaleFactorBands_Long == 0) { - return AAC_DEC_UNSUPPORTED_FORMAT; - } - - FDK_ASSERT(t->ScaleFactorBands_Long[t->NumberOfScaleFactorBands_Long] == samplesPerFrame); - FDK_ASSERT(t->ScaleFactorBands_Short == NULL || t->ScaleFactorBands_Short[t->NumberOfScaleFactorBands_Short]*8 == samplesPerFrame); - - return AAC_DEC_OK; -} |