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authorThe Android Open Source Project <initial-contribution@android.com>2012-07-11 10:15:24 -0700
committerThe Android Open Source Project <initial-contribution@android.com>2012-07-11 10:15:24 -0700
commit2228e360595641dd906bf1773307f43d304f5b2e (patch)
tree57f3d390ebb0782cc0de0fb984c8ea7e45b4f386 /libAACdec/src/channel.cpp
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Change-Id: If584e579464f28b97d50e51fc76ba654a5536c54
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+
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright 1995 - 2012 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:
+
+******************************************************************************/
+
+#include "channel.h"
+#include "aacdecoder.h"
+#include "block.h"
+#include "aacdec_tns.h"
+#include "FDK_bitstream.h"
+#include "FDK_tools_rom.h"
+
+#include "conceal.h"
+
+#include "rvlc.h"
+
+#include "aacdec_hcr.h"
+
+
+static
+void MapMidSideMaskToPnsCorrelation (CAacDecoderChannelInfo *pAacDecoderChannelInfo[2])
+{
+ int group;
+
+ for (group = 0 ; group < pAacDecoderChannelInfo[L]->icsInfo.WindowGroups; group++) {
+ UCHAR groupMask = 1 << group;
+
+ for (UCHAR band = 0 ; band < pAacDecoderChannelInfo[L]->icsInfo.MaxSfBands; band++) {
+ if (pAacDecoderChannelInfo[L]->pComData->jointStereoData.MsUsed[band] & groupMask) { /* channels are correlated */
+ CPns_SetCorrelation(&pAacDecoderChannelInfo[L]->data.aac.PnsData, group, band, 0);
+
+ if (CPns_IsPnsUsed(&pAacDecoderChannelInfo[L]->data.aac.PnsData, group, band) &&
+ CPns_IsPnsUsed(&pAacDecoderChannelInfo[R]->data.aac.PnsData, group, band))
+ pAacDecoderChannelInfo[L]->pComData->jointStereoData.MsUsed[band] ^= groupMask; /* clear the groupMask-bit */
+ }
+ }
+ }
+}
+
+/*!
+ \brief Decode channel pair element
+
+ The function decodes a channel pair element.
+
+ \return none
+*/
+void CChannelElement_Decode( CAacDecoderChannelInfo *pAacDecoderChannelInfo[2], /*!< pointer to aac decoder channel info */
+ CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[2],
+ SamplingRateInfo *pSamplingRateInfo,
+ UINT flags,
+ int el_channels)
+{
+ int ch, maybe_jstereo = 0;
+
+ maybe_jstereo = (el_channels > 1);
+
+ for (ch = 0; ch < el_channels; ch++) {
+ if ( pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_IMDCT
+ || pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_ELDFB )
+ {
+ CBlock_InverseQuantizeSpectralData(pAacDecoderChannelInfo[ch], pSamplingRateInfo);
+ }
+ }
+
+
+
+ if (maybe_jstereo) {
+ /* apply ms */
+ if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow) {
+ int maxSfBandsL = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[L]->icsInfo);
+ int maxSfBandsR = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[R]->icsInfo);
+ if (pAacDecoderChannelInfo[L]->data.aac.PnsData.PnsActive || pAacDecoderChannelInfo[R]->data.aac.PnsData.PnsActive) {
+ MapMidSideMaskToPnsCorrelation(pAacDecoderChannelInfo);
+ }
+
+ CJointStereo_ApplyMS(pAacDecoderChannelInfo,
+ GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo, pSamplingRateInfo),
+ GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo),
+ GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo),
+ maxSfBandsL,
+ maxSfBandsR);
+ }
+
+ /* apply intensity stereo */ /* modifies pAacDecoderChannelInfo[]->aSpecSfb */
+ CJointStereo_ApplyIS(pAacDecoderChannelInfo,
+ GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo, pSamplingRateInfo),
+ GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo),
+ GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo),
+ GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[L]->icsInfo),
+ pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow ? 1 : 0);
+
+ }
+
+ for (ch = 0; ch < el_channels; ch++)
+ {
+ {
+ /* write pAacDecoderChannelInfo[ch]->specScale */
+ CBlock_ScaleSpectralData(pAacDecoderChannelInfo[ch], pSamplingRateInfo);
+
+ ApplyTools (pAacDecoderChannelInfo, pSamplingRateInfo, flags, ch);
+ }
+
+ }
+
+ CRvlc_ElementCheck(
+ pAacDecoderChannelInfo,
+ pAacDecoderStaticChannelInfo,
+ flags,
+ el_channels
+ );
+}
+
+void CChannel_CodebookTableInit(CAacDecoderChannelInfo *pAacDecoderChannelInfo)
+{
+ int b, w, maxBands, maxWindows;
+ int maxSfb = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo->icsInfo);
+ UCHAR *pCodeBook = pAacDecoderChannelInfo->pDynData->aCodeBook;
+
+ if ( IsLongBlock(&pAacDecoderChannelInfo->icsInfo) ) {
+ maxBands = 64;
+ maxWindows = 1;
+ } else {
+ maxBands = 16;
+ maxWindows = 8;
+ }
+
+ for (w = 0; w<maxWindows; w++) {
+ for (b = 0; b < maxSfb; b++) {
+ pCodeBook[b] = ESCBOOK;
+ }
+ for (; b<maxBands; b++) {
+ pCodeBook[b] = ZERO_HCB;
+ }
+ pCodeBook += maxBands;
+ }
+}
+
+
+/*
+ * Arbitrary order bitstream parser
+ */
+
+AAC_DECODER_ERROR CChannelElement_Read(HANDLE_FDK_BITSTREAM hBs,
+ CAacDecoderChannelInfo *pAacDecoderChannelInfo[],
+ CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[],
+ const AUDIO_OBJECT_TYPE aot,
+ const SamplingRateInfo *pSamplingRateInfo,
+ const UINT flags,
+ const UINT frame_length,
+ const UCHAR numberOfChannels,
+ const SCHAR epConfig,
+ HANDLE_TRANSPORTDEC pTpDec
+ )
+{
+ AAC_DECODER_ERROR error = AAC_DEC_OK;
+ const element_list_t *list;
+ int i, ch, decision_bit;
+ int crcReg1 = -1, crcReg2 = -1;
+
+ FDK_ASSERT( (numberOfChannels == 1) || (numberOfChannels == 2) );
+
+ /* Get channel element sequence table */
+ list = getBitstreamElementList(aot, epConfig, numberOfChannels, 0);
+ if (list == NULL) {
+ error = AAC_DEC_UNSUPPORTED_FORMAT;
+ goto bail;
+ }
+
+ CTns_Reset(&pAacDecoderChannelInfo[0]->pDynData->TnsData);
+ if (numberOfChannels == 2) {
+ CTns_Reset(&pAacDecoderChannelInfo[1]->pDynData->TnsData);
+ }
+
+ if (flags & (AC_ELD|AC_SCALABLE)) {
+ pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow = 1;
+ if (numberOfChannels == 2) {
+ pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow;
+ }
+ if (numberOfChannels == 2) {
+ pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow;
+ }
+ }
+
+ /* Iterate through sequence table */
+ i = 0;
+ ch = 0;
+ decision_bit = 0;
+ do {
+ switch (list->id[i]) {
+ case element_instance_tag:
+ pAacDecoderChannelInfo[0]->ElementInstanceTag = FDKreadBits(hBs, 4);
+ if (numberOfChannels == 2) {
+ pAacDecoderChannelInfo[1]->ElementInstanceTag = pAacDecoderChannelInfo[0]->ElementInstanceTag;
+ }
+ break;
+ case common_window:
+ decision_bit = pAacDecoderChannelInfo[ch]->pDynData->RawDataInfo.CommonWindow = FDKreadBits(hBs, 1);
+ if (numberOfChannels == 2) {
+ pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow;
+ }
+ break;
+ case ics_info:
+ /* Read individual channel info */
+ error = IcsRead( hBs,
+ &pAacDecoderChannelInfo[ch]->icsInfo,
+ pSamplingRateInfo,
+ flags );
+
+ if (numberOfChannels == 2 && pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow) {
+ pAacDecoderChannelInfo[1]->icsInfo = pAacDecoderChannelInfo[0]->icsInfo;
+ }
+ break;
+
+
+ case ltp_data_present:
+ if (FDKreadBits(hBs, 1) != 0) {
+ error = AAC_DEC_UNSUPPORTED_PREDICTION;
+ }
+ break;
+
+ case ms:
+ if ( CJointStereo_Read(
+ hBs,
+ &pAacDecoderChannelInfo[0]->pComData->jointStereoData,
+ GetWindowGroups(&pAacDecoderChannelInfo[0]->icsInfo),
+ GetScaleMaxFactorBandsTransmitted(&pAacDecoderChannelInfo[0]->icsInfo,
+ &pAacDecoderChannelInfo[1]->icsInfo),
+ flags) )
+ {
+ error = AAC_DEC_PARSE_ERROR;
+ }
+ break;
+
+ case global_gain:
+ pAacDecoderChannelInfo[ch]->pDynData->RawDataInfo.GlobalGain = (UCHAR) FDKreadBits(hBs,8);
+ break;
+
+ case section_data:
+ error = CBlock_ReadSectionData( hBs,
+ pAacDecoderChannelInfo[ch],
+ pSamplingRateInfo,
+ flags );
+ break;
+
+
+ case scale_factor_data:
+ if (flags & AC_ER_RVLC) {
+ /* read RVLC data from bitstream (error sens. cat. 1) */
+ CRvlc_Read(pAacDecoderChannelInfo[ch], hBs);
+ }
+ else
+ {
+ error = CBlock_ReadScaleFactorData(pAacDecoderChannelInfo[ch], hBs, flags);
+ }
+ break;
+
+ case pulse:
+ if ( CPulseData_Read( hBs,
+ &pAacDecoderChannelInfo[ch]->pDynData->specificTo.aac.PulseData,
+ pSamplingRateInfo->ScaleFactorBands_Long, /* pulse data is only allowed to be present in long blocks! */
+ (void*)&pAacDecoderChannelInfo[ch]->icsInfo,
+ frame_length
+ ) != 0 )
+ {
+ error = AAC_DEC_DECODE_FRAME_ERROR;
+ }
+ break;
+ case tns_data_present:
+ CTns_ReadDataPresentFlag(hBs, &pAacDecoderChannelInfo[ch]->pDynData->TnsData);
+ break;
+ case tns_data:
+ /* tns_data_present is checked inside CTns_Read(). */
+ error = CTns_Read(hBs, &pAacDecoderChannelInfo[ch]->pDynData->TnsData, &pAacDecoderChannelInfo[ch]->icsInfo, flags);
+ break;
+
+ case gain_control_data:
+ break;
+
+ case gain_control_data_present:
+ if (FDKreadBits(hBs, 1)) {
+ error = AAC_DEC_UNSUPPORTED_GAIN_CONTROL_DATA;
+ }
+ break;
+
+ case esc2_rvlc:
+ if (flags & AC_ER_RVLC) {
+ CRvlc_Decode(
+ pAacDecoderChannelInfo[ch],
+ pAacDecoderStaticChannelInfo[ch],
+ hBs
+ );
+ }
+ break;
+
+ case esc1_hcr:
+ if (flags & AC_ER_HCR) {
+ CHcr_Read(hBs, pAacDecoderChannelInfo[ch] );
+ }
+ break;
+
+ case spectral_data:
+ error = CBlock_ReadSpectralData( hBs,
+ pAacDecoderChannelInfo[ch],
+ pSamplingRateInfo,
+ flags );
+ if (flags & AC_ELD) {
+ pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_ELDFB;
+ } else {
+ pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_IMDCT;
+ }
+ break;
+
+
+ /* CRC handling */
+ case adtscrc_start_reg1:
+ if (pTpDec != NULL) {
+ crcReg1 = transportDec_CrcStartReg(pTpDec, 192);
+ }
+ break;
+ case adtscrc_start_reg2:
+ if (pTpDec != NULL) {
+ crcReg2 = transportDec_CrcStartReg(pTpDec, 128);
+ }
+ break;
+ case adtscrc_end_reg1:
+ case drmcrc_end_reg:
+ if (pTpDec != NULL) {
+ transportDec_CrcEndReg(pTpDec, crcReg1);
+ }
+ break;
+ case adtscrc_end_reg2:
+ if (pTpDec != NULL) {
+ transportDec_CrcEndReg(pTpDec, crcReg2);
+ }
+ break;
+ case drmcrc_start_reg:
+ if (pTpDec != NULL) {
+ crcReg1 = transportDec_CrcStartReg(pTpDec, 0);
+ }
+ break;
+
+ /* Non data cases */
+ case next_channel:
+ ch = (ch + 1) % numberOfChannels;
+ break;
+ case link_sequence:
+ list = list->next[decision_bit];
+ i=-1;
+ break;
+
+ default:
+ error = AAC_DEC_UNSUPPORTED_FORMAT;
+ break;
+ }
+
+ if (error != AAC_DEC_OK) {
+ goto bail;
+ }
+
+ i++;
+
+ } while (list->id[i] != end_of_sequence);
+
+bail:
+ return error;
+}