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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
------------------------------------------------------------------------------------------------------------ */
-
-/************************* 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[/*(8)*/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 */
- { MODE_7_1_REAR_SURROUND, { 0, 1, 2, 3, 4, 5, 6, 7,-1,-1,-1,-1} }, /* 7.1ch */
- { MODE_7_1_FRONT_CENTER, { 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, 6, 7, 0, 1, 4, 5, 3,-1,-1,-1,-1} }, /* 7.1ch */
- { MODE_7_1_REAR_SURROUND, { 2, 0, 1, 6, 7, 4, 5, 3,-1,-1,-1,-1} }, /* 7.1ch */
- { MODE_7_1_FRONT_CENTER, { 2, 6, 7, 0, 1, 4, 5, 3,-1,-1,-1,-1} }, /* 7.1ch */
-};
-
-static const CHANNEL_ASSIGNMENT_INFO_TAB assignmentInfoTabWg4[] =
-{
- { 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, { 3, 0, 1, 2,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 4ch */
- { MODE_1_2_2, { 4, 0, 1, 2, 3,-1,-1,-1,-1,-1,-1,-1} }, /* 5ch */
- { MODE_1_2_2_1, { 4, 0, 1, 2, 3, 5,-1,-1,-1,-1,-1,-1} }, /* 5.1ch */
- { MODE_1_2_2_2_1, { 6, 0, 1, 2, 3, 4, 5, 7,-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 */
- { MODE_7_1_REAR_SURROUND, 8, 7, 5 },
- { MODE_7_1_FRONT_CENTER, 8, 7, 5 },
-};
-
-#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 if (co == CH_ORDER_WAV)
- pTab = assignmentInfoTabWav;
- else
- pTab = assignmentInfoTabWg4;
-
- 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:
- case MODE_7_1_REAR_SURROUND:
- case MODE_7_1_FRONT_CENTER:
- /* (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<=(8));
-
-
- 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_7_1_REAR_SURROUND:
- case MODE_7_1_FRONT_CENTER:
- case MODE_1_2_2_2_1: {
- int cpe3Idx = 3;
- int lfeIdx = 4;
-
- /* (7.1) sce + cpe + cpe + cpe + lfe */
- FIXP_DBL sceRate = hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
- FIXP_DBL cpe1Rate = hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
- FIXP_DBL cpe2Rate = hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits;
- FIXP_DBL cpe3Rate = hQC->elementBits[cpe3Idx]->relativeBitsEl = cm->elInfo[cpe3Idx].relativeBits;
- FIXP_DBL lfeRate = hQC->elementBits[lfeIdx]->relativeBitsEl = cm->elInfo[lfeIdx].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[cpe3Idx]->chBitrateEl = fMult(cpe3Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
- hQC->elementBits[lfeIdx]->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[cpe3Idx]->maxBitsEl = 2*maxChannelBits;
- hQC->elementBits[lfeIdx]->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:
- case MODE_7_1_REAR_SURROUND:
- case MODE_7_1_FRONT_CENTER:
- 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;
-}
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