| |
| /* ----------------------------------------------------------------------------------------------------------- |
| 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; |
| } |
