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authorMatthias P. Braendli <matthias.braendli@mpb.li>2016-09-10 20:15:44 +0200
committerMatthias P. Braendli <matthias.braendli@mpb.li>2016-09-10 20:15:44 +0200
commit14c7b800eaa23e9da7c92c7c4df397d0c191f097 (patch)
treed840b6ec41ff74d1184ca1dcd7731d08f1e9ebbb /libAACdec/src/channelinfo.cpp
parent78a801e4d716c6f2403cc56cf6c5b6f138f24b2f (diff)
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Remove FDK-AAC
Diffstat (limited to 'libAACdec/src/channelinfo.cpp')
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diff --git a/libAACdec/src/channelinfo.cpp b/libAACdec/src/channelinfo.cpp
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-
-/* -----------------------------------------------------------------------------------------------------------
-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;
-}