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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
+----------------------------------------------------------------------------------------------------------- */
+
+/************************* Fast MPEG AAC Audio Encoder **********************
+
+ Initial author: A. Groeschel
+ contents/description: channel mapping functionality
+
+******************************************************************************/
+
+#include "channel_map.h"
+#include "bitenc.h"
+#include "psy_const.h"
+#include "qc_data.h"
+#include "aacEnc_ram.h"
+
+
+/* channel_assignment treats the relationship of Input file channels
+ to the encoder channels.
+ This is necessary because the usual order in RIFF files (.wav)
+ is different from the elements order in the coder given
+ by Table 8.1 (implicit speaker mapping) of the AAC standard.
+
+ In mono and stereo case, this is trivial.
+ In mc case, it looks like this:
+
+ Channel Input file coder chan
+5ch:
+ front center 2 0 (SCE channel)
+ left center 0 1 (1st of 1st CPE)
+ right center 1 2 (2nd of 1st CPE)
+ left surround 3 3 (1st of 2nd CPE)
+ right surround 4 4 (2nd of 2nd CPE)
+
+5.1ch:
+ front center 2 0 (SCE channel)
+ left center 0 1 (1st of 1st CPE)
+ right center 1 2 (2nd of 1st CPE)
+ left surround 4 3 (1st of 2nd CPE)
+ right surround 5 4 (2nd of 2nd CPE)
+ LFE 3 5 (LFE)
+*/
+
+typedef struct {
+
+ CHANNEL_MODE encoderMode;
+ INT channel_assignment[/*(6)*/12];
+
+} CHANNEL_ASSIGNMENT_INFO_TAB;
+
+
+static const CHANNEL_ASSIGNMENT_INFO_TAB assignmentInfoTabMpeg[] =
+{
+ { MODE_INVALID, {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* invalid */
+ { MODE_1, { 0,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* mono */
+ { MODE_2, { 0, 1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* stereo */
+ { MODE_1_2, { 0, 1, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 3ch */
+ { MODE_1_2_1, { 0, 1, 2, 3,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 4ch */
+ { MODE_1_2_2, { 0, 1, 2, 3, 4,-1,-1,-1,-1,-1,-1,-1} }, /* 5ch */
+ { MODE_1_2_2_1, { 0, 1, 2, 3, 4, 5,-1,-1,-1,-1,-1,-1} }, /* 5.1ch */
+ { MODE_1_2_2_2_1, { 0, 1, 2, 3, 4, 5, 6, 7,-1,-1,-1,-1} }, /* 7.1ch */
+};
+
+static const CHANNEL_ASSIGNMENT_INFO_TAB assignmentInfoTabWav[] =
+{
+ { MODE_INVALID, {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* invalid */
+ { MODE_1, { 0,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* mono */
+ { MODE_2, { 0, 1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* stereo */
+ { MODE_1_2, { 2, 0, 1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 3ch */
+ { MODE_1_2_1, { 2, 0, 1, 3,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 4ch */
+ { MODE_1_2_2, { 2, 0, 1, 3, 4,-1,-1,-1,-1,-1,-1,-1} }, /* 5ch */
+ { MODE_1_2_2_1, { 2, 0, 1, 4, 5, 3,-1,-1,-1,-1,-1,-1} }, /* 5.1ch */
+ { MODE_1_2_2_2_1, { 2, 0, 1, 6, 7, 4, 5, 3,-1,-1,-1,-1} }, /* 7.1ch */
+};
+
+/* Channel mode configuration tab provides,
+ corresponding number of channels and elements
+*/
+static const CHANNEL_MODE_CONFIG_TAB channelModeConfig[] =
+{
+ { MODE_1, 1, 1, 1 }, /* SCE */
+ { MODE_2, 2, 2, 1 }, /* CPE */
+ { MODE_1_2, 3, 3, 2 }, /* SCE,CPE */
+ { MODE_1_2_1, 4, 4, 3 }, /* SCE,CPE,SCE */
+ { MODE_1_2_2, 5, 5, 3 }, /* SCE,CPE,CPE */
+ { MODE_1_2_2_1, 6, 5, 4 }, /* SCE,CPE,CPE,LFE */
+ { MODE_1_2_2_2_1, 8, 7, 5 }, /* SCE,CPE,CPE,CPE,LFE */
+};
+
+#define MAX_MODES (sizeof(assignmentInfoTabWav)/sizeof(CHANNEL_ASSIGNMENT_INFO_TAB))
+
+const INT* FDKaacEnc_getChannelAssignment(CHANNEL_MODE encMode, CHANNEL_ORDER co)
+{
+ const CHANNEL_ASSIGNMENT_INFO_TAB *pTab;
+ int i;
+
+ if (co == CH_ORDER_MPEG)
+ pTab = assignmentInfoTabMpeg;
+ else
+ pTab = assignmentInfoTabWav;
+
+ for(i=MAX_MODES-1; i>0; i--) {
+ if (encMode== pTab[i].encoderMode) {
+ break;
+ }
+ }
+ return (pTab[i].channel_assignment);
+}
+
+AAC_ENCODER_ERROR FDKaacEnc_DetermineEncoderMode(CHANNEL_MODE* mode, INT nChannels)
+{
+ INT i;
+ CHANNEL_MODE encMode = MODE_INVALID;
+
+ if (*mode==MODE_UNKNOWN) {
+ for (i=0; i<(INT)sizeof(channelModeConfig)/(INT)sizeof(CHANNEL_MODE_CONFIG_TAB); i++) {
+ if (channelModeConfig[i].nChannels==nChannels) {
+ encMode = channelModeConfig[i].encMode;
+ break;
+ }
+ }
+ *mode = encMode;
+ }
+ else {
+ /* check if valid channel configuration */
+ if (FDKaacEnc_GetChannelModeConfiguration(*mode)->nChannels==nChannels) {
+ encMode = *mode;
+ }
+ }
+
+ if (encMode==MODE_INVALID) {
+ return AAC_ENC_UNSUPPORTED_CHANNELCONFIG;
+ }
+
+ return AAC_ENC_OK;
+}
+
+static INT FDKaacEnc_initElement (ELEMENT_INFO* elInfo, MP4_ELEMENT_ID elType, INT* cnt, CHANNEL_MODE mode, CHANNEL_ORDER co, INT* it_cnt, const FIXP_DBL relBits) {
+
+ INT error=0;
+ INT counter =*cnt;
+
+ const INT *assign = FDKaacEnc_getChannelAssignment(mode, co);
+
+ elInfo->elType=elType;
+ elInfo->relativeBits = relBits;
+
+ switch(elInfo->elType) {
+ case ID_SCE: case ID_LFE: case ID_CCE:
+ elInfo->nChannelsInEl=1;
+ elInfo->ChannelIndex[0]=assign[counter++];
+ elInfo->instanceTag=it_cnt[elType]++;
+
+ break;
+ case ID_CPE:
+ elInfo->nChannelsInEl=2;
+ elInfo->ChannelIndex[0]=assign[counter++];
+ elInfo->ChannelIndex[1]=assign[counter++];
+ elInfo->instanceTag=it_cnt[elType]++;
+ break;
+ case ID_DSE:
+ elInfo->nChannelsInEl=0;
+ elInfo->ChannelIndex[0]=0;
+ elInfo->ChannelIndex[1]=0;
+ elInfo->instanceTag=it_cnt[elType]++;
+ break;
+ default: error=1;
+ };
+ *cnt = counter;
+ return error;
+
+}
+
+AAC_ENCODER_ERROR FDKaacEnc_InitChannelMapping(CHANNEL_MODE mode, CHANNEL_ORDER co, CHANNEL_MAPPING* cm)
+{
+ INT count=0; /* count through coder channels */
+ INT it_cnt[ID_END+1];
+ INT i;
+
+ for (i=0; i<ID_END; i++)
+ it_cnt[i]=0;
+
+ FDKmemclear(cm, sizeof(CHANNEL_MAPPING));
+
+ /* init channel mapping*/
+ for (i=0; i<(INT)sizeof(channelModeConfig)/(INT)sizeof(CHANNEL_MODE_CONFIG_TAB); i++) {
+ if (channelModeConfig[i].encMode==mode)
+ {
+ cm->encMode = channelModeConfig[i].encMode;
+ cm->nChannels = channelModeConfig[i].nChannels;
+ cm->nChannelsEff = channelModeConfig[i].nChannelsEff;
+ cm->nElements = channelModeConfig[i].nElements;
+
+ break;
+ }
+ }
+
+ /* init element info struct */
+ switch(mode) {
+ case MODE_1:
+ /* (mono) sce */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, (FIXP_DBL)MAXVAL_DBL);
+ break;
+ case MODE_2:
+ /* (stereo) cpe */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_CPE, &count, mode, co, it_cnt, (FIXP_DBL)MAXVAL_DBL);
+ break;
+
+ case MODE_1_2:
+ /* sce + cpe */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.4f));
+ FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.6f));
+ break;
+
+ case MODE_1_2_1:
+ /* sce + cpe + sce */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.3f));
+ FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.4f));
+ FDKaacEnc_initElement(&cm->elInfo[2], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.3f));
+ break;
+
+ case MODE_1_2_2:
+ /* sce + cpe + cpe */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.26f));
+ FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.37f));
+ FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.37f));
+ break;
+
+ case MODE_1_2_2_1:
+ /* (5.1) sce + cpe + cpe + lfe */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.24f));
+ FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.35f));
+ FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.35f));
+ FDKaacEnc_initElement(&cm->elInfo[3], ID_LFE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.06f));
+ break;
+
+ case MODE_1_2_2_2_1:
+ /* (7.1) sce + cpe + cpe + cpe + lfe */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.18f));
+ FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.26f));
+ FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.26f));
+ FDKaacEnc_initElement(&cm->elInfo[3], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.26f));
+ FDKaacEnc_initElement(&cm->elInfo[4], ID_LFE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.04f));
+ break;
+
+ default:
+ //*chMap=0;
+ return AAC_ENC_UNSUPPORTED_CHANNELCONFIG;
+ };
+
+
+ FDK_ASSERT(cm->nElements<=(6));
+
+
+ return AAC_ENC_OK;
+}
+
+AAC_ENCODER_ERROR FDKaacEnc_InitElementBits(QC_STATE *hQC,
+ CHANNEL_MAPPING *cm,
+ INT bitrateTot,
+ INT averageBitsTot,
+ INT maxChannelBits)
+{
+ int sc_brTot = CountLeadingBits(bitrateTot);
+
+ switch(cm->encMode) {
+ case MODE_1:
+ hQC->elementBits[0]->chBitrateEl = bitrateTot;
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ break;
+
+ case MODE_2:
+ hQC->elementBits[0]->chBitrateEl = bitrateTot>>1;
+
+ hQC->elementBits[0]->maxBitsEl = 2*maxChannelBits;
+
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ break;
+ case MODE_1_2: {
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
+ FIXP_DBL sceRate = cm->elInfo[0].relativeBits;
+ FIXP_DBL cpeRate = cm->elInfo[1].relativeBits;
+
+ hQC->elementBits[0]->chBitrateEl = fMult(sceRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
+ hQC->elementBits[1]->chBitrateEl = fMult(cpeRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+ hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits;
+ break;
+ }
+ case MODE_1_2_1: {
+ /* sce + cpe + sce */
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
+ hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits;
+ FIXP_DBL sce1Rate = cm->elInfo[0].relativeBits;
+ FIXP_DBL cpeRate = cm->elInfo[1].relativeBits;
+ FIXP_DBL sce2Rate = cm->elInfo[2].relativeBits;
+
+ hQC->elementBits[0]->chBitrateEl = fMult(sce1Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
+ hQC->elementBits[1]->chBitrateEl = fMult(cpeRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
+ hQC->elementBits[2]->chBitrateEl = fMult(sce2Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+ hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits;
+ hQC->elementBits[2]->maxBitsEl = maxChannelBits;
+ break;
+ }
+ case MODE_1_2_2: {
+ /* sce + cpe + cpe */
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
+ hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits;
+ FIXP_DBL sceRate = cm->elInfo[0].relativeBits;
+ FIXP_DBL cpe1Rate = cm->elInfo[1].relativeBits;
+ FIXP_DBL cpe2Rate = cm->elInfo[2].relativeBits;
+
+ hQC->elementBits[0]->chBitrateEl = fMult(sceRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
+ hQC->elementBits[1]->chBitrateEl = fMult(cpe1Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
+ hQC->elementBits[2]->chBitrateEl = fMult(cpe2Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+ hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits;
+ hQC->elementBits[2]->maxBitsEl = 2*maxChannelBits;
+ break;
+ }
+
+ case MODE_1_2_2_1: {
+ /* (5.1) sce + cpe + cpe + lfe */
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
+ hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits;
+ hQC->elementBits[3]->relativeBitsEl = cm->elInfo[3].relativeBits;
+ FIXP_DBL sceRate = cm->elInfo[0].relativeBits;
+ FIXP_DBL cpe1Rate = cm->elInfo[1].relativeBits;
+ FIXP_DBL cpe2Rate = cm->elInfo[2].relativeBits;
+ FIXP_DBL lfeRate = cm->elInfo[3].relativeBits;
+
+ int maxBitsTot = maxChannelBits * 5; /* LFE does not add to bit reservoir */
+ int sc = CountLeadingBits(fixMax(maxChannelBits,averageBitsTot));
+ int maxLfeBits = (int) FDKmax ( (INT)((fMult(lfeRate,(FIXP_DBL)(maxChannelBits<<sc))>>sc)<<1),
+ (INT)((fMult(FL2FXCONST_DBL(1.1f/2.f),fMult(lfeRate,(FIXP_DBL)(averageBitsTot<<sc)))<<1)>>sc) );
+
+ maxChannelBits = (maxBitsTot - maxLfeBits);
+ sc = CountLeadingBits(maxChannelBits);
+
+ maxChannelBits = fMult((FIXP_DBL)maxChannelBits<<sc,GetInvInt(5))>>sc;
+
+ hQC->elementBits[0]->chBitrateEl = fMult(sceRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
+ hQC->elementBits[1]->chBitrateEl = fMult(cpe1Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
+ hQC->elementBits[2]->chBitrateEl = fMult(cpe2Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
+ hQC->elementBits[3]->chBitrateEl = fMult(lfeRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+ hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits;
+ hQC->elementBits[2]->maxBitsEl = 2*maxChannelBits;
+ hQC->elementBits[3]->maxBitsEl = maxLfeBits;
+
+ break;
+ }
+
+ case MODE_1_2_2_2_1:{
+ /* (7.1) sce + cpe + cpe + cpe + lfe */
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
+ hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits;
+ hQC->elementBits[3]->relativeBitsEl = cm->elInfo[3].relativeBits;
+ hQC->elementBits[4]->relativeBitsEl = cm->elInfo[4].relativeBits;
+ FIXP_DBL sceRate = cm->elInfo[0].relativeBits;
+ FIXP_DBL cpe1Rate = cm->elInfo[1].relativeBits;
+ FIXP_DBL cpe2Rate = cm->elInfo[2].relativeBits;
+ FIXP_DBL cpe3Rate = cm->elInfo[3].relativeBits;
+ FIXP_DBL lfeRate = cm->elInfo[4].relativeBits;
+
+ int maxBitsTot = maxChannelBits * 7; /* LFE does not add to bit reservoir */
+ int sc = CountLeadingBits(fixMax(maxChannelBits,averageBitsTot));
+ int maxLfeBits = (int) FDKmax ( (INT)((fMult(lfeRate,(FIXP_DBL)(maxChannelBits<<sc))>>sc)<<1),
+ (INT)((fMult(FL2FXCONST_DBL(1.1f/2.f),fMult(lfeRate,(FIXP_DBL)(averageBitsTot<<sc)))<<1)>>sc) );
+
+ maxChannelBits = (maxBitsTot - maxLfeBits) / 7;
+
+ hQC->elementBits[0]->chBitrateEl = fMult(sceRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
+ hQC->elementBits[1]->chBitrateEl = fMult(cpe1Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
+ hQC->elementBits[2]->chBitrateEl = fMult(cpe2Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
+ hQC->elementBits[3]->chBitrateEl = fMult(cpe3Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
+ hQC->elementBits[4]->chBitrateEl = fMult(lfeRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+ hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits;
+ hQC->elementBits[2]->maxBitsEl = 2*maxChannelBits;
+ hQC->elementBits[3]->maxBitsEl = 2*maxChannelBits;
+ hQC->elementBits[4]->maxBitsEl = maxLfeBits;
+ break;
+ }
+
+ default:
+ return AAC_ENC_UNSUPPORTED_CHANNELCONFIG;
+ }
+
+ return AAC_ENC_OK;
+}
+
+/********************************************************************************/
+/* */
+/* function: GetMonoStereoMODE(const CHANNEL_MODE mode) */
+/* */
+/* description: Determines encoder setting from channel mode. */
+/* Multichannel modes are mapped to mono or stereo modes */
+/* returns MODE_MONO in case of mono, */
+/* MODE_STEREO in case of stereo */
+/* MODE_INVALID in case of error */
+/* */
+/* input: CHANNEL_MODE mode: Encoder mode (see qc_data.h). */
+/* output: return: CM_STEREO_MODE monoStereoSetting */
+/* (MODE_INVALID: error, */
+/* MODE_MONO: mono */
+/* MODE_STEREO: stereo). */
+/* */
+/* misc: No memory is allocated. */
+/* */
+/********************************************************************************/
+
+ELEMENT_MODE FDKaacEnc_GetMonoStereoMode(const CHANNEL_MODE mode){
+
+ ELEMENT_MODE monoStereoSetting = EL_MODE_INVALID;
+
+ switch(mode){
+ case MODE_1: /* mono setups */
+ monoStereoSetting = EL_MODE_MONO;
+ break;
+ case MODE_2: /* stereo setups */
+ case MODE_1_2:
+ case MODE_1_2_1:
+ case MODE_1_2_2:
+ case MODE_1_2_2_1:
+ case MODE_1_2_2_2_1:
+ monoStereoSetting = EL_MODE_STEREO;
+ break;
+ default: /* error */
+ monoStereoSetting = EL_MODE_INVALID;
+ break;
+ }
+
+ return monoStereoSetting;
+}
+
+const CHANNEL_MODE_CONFIG_TAB* FDKaacEnc_GetChannelModeConfiguration(const CHANNEL_MODE mode)
+{
+ INT i;
+ const CHANNEL_MODE_CONFIG_TAB *cm_config = NULL;
+
+ /* get channel mode config */
+ for (i=0; i<(INT)sizeof(channelModeConfig)/(INT)sizeof(CHANNEL_MODE_CONFIG_TAB); i++) {
+ if (channelModeConfig[i].encMode==mode)
+ {
+ cm_config = &channelModeConfig[i];
+ break;
+ }
+ }
+ return cm_config;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-11 13:23:21 +0000