| |
| /* ----------------------------------------------------------------------------------------------------------- |
| 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 Encoder ************************** |
| |
| Author(s): |
| Description: |
| |
| ******************************************************************************/ |
| |
| #include "tpenc_latm.h" |
| |
| |
| #include "genericStds.h" |
| |
| static const short celpFrameLengthTable[64] = { |
| 154, 170, 186, 147, 156, 165, 114, 120, |
| 186, 126, 132, 138, 142, 146, 154, 166, |
| 174, 182, 190, 198, 206, 210, 214, 110, |
| 114, 118, 120, 122, 218, 230, 242, 254, |
| 266, 278, 286, 294, 318, 342, 358, 374, |
| 390, 406, 422, 136, 142, 148, 154, 160, |
| 166, 170, 174, 186, 198, 206, 214, 222, |
| 230, 238, 216, 160, 280, 338, 0, 0 |
| }; |
| |
| /******* |
| write value to transport stream |
| first two bits define the size of the value itself |
| then the value itself, with a size of 0-3 bytes |
| *******/ |
| static |
| UINT transportEnc_LatmWriteValue(HANDLE_FDK_BITSTREAM hBs, int value) |
| { |
| UCHAR valueBytes = 4; |
| unsigned int bitsWritten = 0; |
| int i; |
| |
| if ( value < (1<<8) ) { |
| valueBytes = 1; |
| } else if ( value < (1<<16) ) { |
| valueBytes = 2; |
| } else if ( value < (1<<24) ) { |
| valueBytes = 3; |
| } else { |
| valueBytes = 4; |
| } |
| |
| FDKwriteBits(hBs, valueBytes-1, 2 ); /* size of value in Bytes */ |
| for (i=0; i<valueBytes; i++) { |
| /* write most significant Byte first */ |
| FDKwriteBits(hBs, (UCHAR)(value>>((valueBytes-1-i)<<3)), 8); |
| } |
| |
| bitsWritten = (valueBytes<<3)+2; |
| |
| return bitsWritten; |
| } |
| |
| static |
| UINT transportEnc_LatmCountFixBitDemandHeader ( HANDLE_LATM_STREAM hAss ) |
| { |
| int bitDemand = 0; |
| int insertSetupData = 0 ; |
| |
| /* only if start of new latm frame */ |
| if (hAss->subFrameCnt==0) |
| { |
| /* AudioSyncStream */ |
| |
| if (hAss->tt == TT_MP4_LOAS) { |
| bitDemand += 11 ; /* syncword */ |
| bitDemand += 13 ; /* audioMuxLengthBytes */ |
| } |
| |
| /* AudioMuxElement*/ |
| |
| /* AudioMuxElement::Stream Mux Config */ |
| if (hAss->muxConfigPeriod > 0) { |
| insertSetupData = (hAss->latmFrameCounter == 0); |
| } else { |
| insertSetupData = 0; |
| } |
| |
| if (hAss->tt != TT_MP4_LATM_MCP0) { |
| /* AudioMuxElement::useSameStreamMux Flag */ |
| bitDemand+=1; |
| |
| if( insertSetupData ) { |
| bitDemand += hAss->streamMuxConfigBits; |
| } |
| } |
| |
| /* AudioMuxElement::otherDataBits */ |
| bitDemand += 8*hAss->otherDataLenBytes; |
| |
| /* AudioMuxElement::ByteAlign */ |
| if ( bitDemand % 8 ) { |
| hAss->fillBits = 8 - (bitDemand % 8); |
| bitDemand += hAss->fillBits ; |
| } else { |
| hAss->fillBits = 0; |
| } |
| } |
| |
| return bitDemand ; |
| } |
| |
| static |
| UINT transportEnc_LatmCountVarBitDemandHeader ( HANDLE_LATM_STREAM hAss , unsigned int streamDataLength ) |
| { |
| int bitDemand = 0; |
| int prog, layer; |
| |
| /* Payload Length Info*/ |
| if( hAss->allStreamsSameTimeFraming ) { |
| for( prog=0; prog<hAss->noProgram; prog++ ) { |
| for( layer=0; layer<LATM_MAX_LAYERS; layer++ ) { |
| LATM_LAYER_INFO *p_linfo = &(hAss->m_linfo[prog][layer]); |
| |
| if( p_linfo->streamID >= 0 ) { |
| switch( p_linfo->frameLengthType ) { |
| case 0: |
| if ( streamDataLength > 0 ) { |
| streamDataLength -= bitDemand ; |
| while( streamDataLength >= (255<<3) ) { |
| bitDemand+=8; |
| streamDataLength -= (255<<3); |
| } |
| bitDemand += 8; |
| } |
| break; |
| |
| case 1: |
| case 4: |
| case 6: |
| bitDemand += 2; |
| break; |
| |
| default: |
| return 0; |
| } |
| } |
| } |
| } |
| } else { |
| /* there are many possibilities to use this mechanism. */ |
| switch( hAss->varMode ) { |
| case LATMVAR_SIMPLE_SEQUENCE: { |
| /* Use the sequence generated by the encoder */ |
| //int streamCntPosition = transportEnc_SetWritePointer( hAss->hAssemble, 0 ); |
| //int streamCntPosition = FDKgetValidBits( hAss->hAssemble ); |
| bitDemand+=4; |
| |
| hAss->varStreamCnt = 0; |
| for( prog=0; prog<hAss->noProgram; prog++ ) { |
| for( layer=0; layer<LATM_MAX_LAYERS; layer++ ) { |
| LATM_LAYER_INFO *p_linfo = &(hAss->m_linfo[prog][layer]); |
| |
| if( p_linfo->streamID >= 0 ) { |
| |
| bitDemand+=4; /* streamID */ |
| switch( p_linfo->frameLengthType ) { |
| case 0: |
| streamDataLength -= bitDemand ; |
| while( streamDataLength >= (255<<3) ) { |
| bitDemand+=8; |
| streamDataLength -= (255<<3); |
| } |
| |
| bitDemand += 8; |
| break; |
| /*bitDemand += 1; endFlag |
| break;*/ |
| |
| case 1: |
| case 4: |
| case 6: |
| |
| break; |
| |
| default: |
| return 0; |
| } |
| hAss->varStreamCnt++; |
| } |
| } |
| } |
| bitDemand+=4; |
| //transportEnc_UpdateBitstreamField( hAss->hAssemble, streamCntPosition, hAss->varStreamCnt-1, 4 ); |
| //UINT pos = streamCntPosition-FDKgetValidBits(hAss->hAssemble); |
| //FDKpushBack( hAss->hAssemble, pos); |
| //FDKwriteBits( hAss->hAssemble, hAss->varStreamCnt-1, 4); |
| //FDKpushFor( hAss->hAssemble, pos-4); |
| } |
| break; |
| |
| default: |
| return 0; |
| } |
| } |
| |
| return bitDemand ; |
| } |
| |
| TRANSPORTENC_ERROR |
| CreateStreamMuxConfig( |
| HANDLE_LATM_STREAM hAss, |
| HANDLE_FDK_BITSTREAM hBs, |
| int bufferFullness, |
| CSTpCallBacks *cb |
| ) |
| { |
| INT streamIDcnt, tmp; |
| int layer, prog; |
| |
| USHORT coreFrameOffset=0; |
| |
| hAss->audioMuxVersionA = 0; /* for future extensions */ |
| hAss->streamMuxConfigBits = 0; |
| |
| FDKwriteBits( hBs, hAss->audioMuxVersion, 1 ); /* audioMuxVersion */ |
| hAss->streamMuxConfigBits += 1; |
| |
| if ( hAss->audioMuxVersion == 1 ) { |
| FDKwriteBits( hBs, hAss->audioMuxVersionA, 1 ); /* audioMuxVersionA */ |
| hAss->streamMuxConfigBits+=1; |
| } |
| |
| if ( hAss->audioMuxVersionA == 0 ) |
| { |
| if ( hAss->audioMuxVersion == 1 ) { |
| hAss->streamMuxConfigBits+= transportEnc_LatmWriteValue( hBs, hAss->taraBufferFullness );/* taraBufferFullness */ |
| } |
| FDKwriteBits( hBs, hAss->allStreamsSameTimeFraming ? 1:0, 1 ); /* allStreamsSameTimeFraming */ |
| FDKwriteBits( hBs, hAss->noSubframes-1, 6 ); /* Number of Subframes */ |
| FDKwriteBits( hBs, hAss->noProgram-1, 4 ); /* Number of Programs */ |
| |
| hAss->streamMuxConfigBits+=11; |
| |
| streamIDcnt = 0; |
| for( prog=0; prog<hAss->noProgram; prog++ ) { |
| int transLayer = 0; |
| |
| FDKwriteBits( hBs, hAss->noLayer[prog]-1, 3 ); |
| hAss->streamMuxConfigBits+=3; |
| |
| for( layer=0; layer<LATM_MAX_LAYERS; layer++ ) { |
| LATM_LAYER_INFO *p_linfo = &(hAss->m_linfo[prog][layer]); |
| CODER_CONFIG *p_lci = hAss->config[prog][layer]; |
| |
| p_linfo->streamID = -1; |
| |
| if( hAss->config[prog][layer] != NULL ) { |
| int useSameConfig = 0; |
| |
| if( transLayer > 0 ) { |
| FDKwriteBits( hBs, useSameConfig ? 1 : 0, 1 ); |
| hAss->streamMuxConfigBits+=1; |
| } |
| if( (useSameConfig == 0) || (transLayer==0) ) { |
| UINT bits; |
| |
| if ( hAss->audioMuxVersion == 1 ) { |
| FDKpushFor(hBs, 2); /* align to ASC, even if we do not know the length of the "ascLen" field yet */ |
| } |
| |
| bits = FDKgetValidBits( hBs ); |
| |
| transportEnc_writeASC( |
| hBs, |
| hAss->config[prog][layer], |
| cb |
| ); |
| |
| bits = FDKgetValidBits( hBs ) - bits; |
| |
| if ( hAss->audioMuxVersion == 1 ) { |
| FDKpushBack(hBs, bits+2); |
| hAss->streamMuxConfigBits += transportEnc_LatmWriteValue( hBs, bits ); |
| transportEnc_writeASC( |
| hBs, |
| hAss->config[prog][layer], |
| cb |
| ); |
| } |
| |
| hAss->streamMuxConfigBits += bits; /* add asc length to smc summary */ |
| } |
| transLayer++; |
| |
| if( !hAss->allStreamsSameTimeFraming ) { |
| if( streamIDcnt >= LATM_MAX_STREAM_ID ) |
| return TRANSPORTENC_INVALID_CONFIG; |
| } |
| p_linfo->streamID = streamIDcnt++; |
| |
| switch( p_lci->aot ) { |
| case AOT_AAC_MAIN : |
| case AOT_AAC_LC : |
| case AOT_AAC_SSR : |
| case AOT_AAC_LTP : |
| case AOT_AAC_SCAL : |
| case AOT_ER_AAC_LD : |
| case AOT_ER_AAC_ELD : |
| case AOT_USAC: |
| case AOT_RSVD50: |
| p_linfo->frameLengthType = 0; |
| |
| FDKwriteBits( hBs, p_linfo->frameLengthType, 3 ); /* frameLengthType */ |
| FDKwriteBits( hBs, bufferFullness, 8 ); /* bufferFullness */ |
| hAss->streamMuxConfigBits+=11; |
| |
| if ( !hAss->allStreamsSameTimeFraming ) { |
| CODER_CONFIG *p_lci_prev = hAss->config[prog][layer-1]; |
| if ( ((p_lci->aot == AOT_AAC_SCAL) || (p_lci->aot == AOT_ER_AAC_SCAL)) && |
| ((p_lci_prev->aot == AOT_CELP) || (p_lci_prev->aot == AOT_ER_CELP)) ) { |
| FDKwriteBits( hBs, coreFrameOffset, 6 ); /* coreFrameOffset */ |
| hAss->streamMuxConfigBits+=6; |
| } |
| } |
| break; |
| |
| case AOT_TWIN_VQ: |
| p_linfo->frameLengthType = 1; |
| tmp = ( (p_lci->bitsFrame+7) >> 3 ) - 20; /* transmission frame length in bytes */ |
| if( (tmp < 0) ) { |
| return TRANSPORTENC_INVALID_TRANSMISSION_FRAME_LENGTH; |
| } |
| FDKwriteBits( hBs, p_linfo->frameLengthType, 3 ); /* frameLengthType */ |
| FDKwriteBits( hBs, tmp, 9 ); |
| hAss->streamMuxConfigBits+=12; |
| |
| p_linfo->frameLengthBits = (tmp+20) << 3; |
| break; |
| |
| case AOT_CELP: |
| p_linfo->frameLengthType = 4; |
| FDKwriteBits( hBs, p_linfo->frameLengthType, 3 ); /* frameLengthType */ |
| hAss->streamMuxConfigBits+=3; |
| { |
| int i; |
| for( i=0; i<62; i++ ) { |
| if( celpFrameLengthTable[i] == p_lci->bitsFrame ) |
| break; |
| } |
| if( i>=62 ) { |
| return TRANSPORTENC_INVALID_CELP_FRAME_LENGTH; |
| } |
| |
| FDKwriteBits( hBs, i, 6 ); /* CELPframeLengthTabelIndex */ |
| hAss->streamMuxConfigBits+=6; |
| } |
| p_linfo->frameLengthBits = p_lci->bitsFrame; |
| break; |
| |
| case AOT_HVXC: |
| p_linfo->frameLengthType = 6; |
| FDKwriteBits( hBs, p_linfo->frameLengthType, 3 ); /* frameLengthType */ |
| hAss->streamMuxConfigBits+=3; |
| { |
| int i; |
| |
| if( p_lci->bitsFrame == 40 ) { |
| i = 0; |
| } else if( p_lci->bitsFrame == 80 ) { |
| i = 1; |
| } else { |
| return TRANSPORTENC_INVALID_FRAME_BITS; |
| } |
| FDKwriteBits( hBs, i, 1 ); /* HVXCframeLengthTableIndex */ |
| hAss->streamMuxConfigBits+=1; |
| } |
| p_linfo->frameLengthBits = p_lci->bitsFrame; |
| break; |
| |
| case AOT_NULL_OBJECT: |
| default: |
| return TRANSPORTENC_INVALID_AOT; |
| } |
| } |
| } |
| } |
| |
| FDKwriteBits( hBs, (hAss->otherDataLenBytes>0) ? 1:0, 1 ); /* otherDataPresent */ |
| hAss->streamMuxConfigBits+=1; |
| |
| if( hAss->otherDataLenBytes > 0 ) { |
| |
| INT otherDataLenTmp = hAss->otherDataLenBytes; |
| INT escCnt = 0; |
| INT otherDataLenEsc = 1; |
| |
| while(otherDataLenTmp) { |
| otherDataLenTmp >>= 8; |
| escCnt ++; |
| } |
| |
| do { |
| otherDataLenTmp = (hAss->otherDataLenBytes>>(escCnt*8)) & 0xFF; |
| escCnt--; |
| otherDataLenEsc = escCnt>0; |
| |
| FDKwriteBits( hBs, otherDataLenEsc, 1 ); |
| FDKwriteBits( hBs, otherDataLenTmp, 8 ); |
| hAss->streamMuxConfigBits+=9; |
| } while(otherDataLenEsc); |
| } |
| |
| { |
| USHORT crcCheckPresent=0; |
| USHORT crcCheckSum=0; |
| |
| FDKwriteBits( hBs, crcCheckPresent, 1 ); /* crcCheckPresent */ |
| hAss->streamMuxConfigBits+=1; |
| if ( crcCheckPresent ){ |
| FDKwriteBits( hBs, crcCheckSum, 8 ); /* crcCheckSum */ |
| hAss->streamMuxConfigBits+=8; |
| } |
| } |
| |
| } else { /* if ( audioMuxVersionA == 0 ) */ |
| |
| /* for future extensions */ |
| |
| } |
| |
| return TRANSPORTENC_OK; |
| } |
| |
| |
| static TRANSPORTENC_ERROR |
| WriteAuPayloadLengthInfo( HANDLE_FDK_BITSTREAM hBitStream, int AuLengthBits ) |
| { |
| int restBytes; |
| |
| if( AuLengthBits % 8 ) |
| return TRANSPORTENC_INVALID_AU_LENGTH; |
| |
| while( AuLengthBits >= 255*8 ) { |
| FDKwriteBits( hBitStream, 255, 8 ); /* 255 shows incomplete AU */ |
| AuLengthBits -= (255*8); |
| } |
| |
| restBytes = (AuLengthBits) >> 3; |
| FDKwriteBits( hBitStream, restBytes, 8 ); |
| |
| return TRANSPORTENC_OK; |
| } |
| |
| static |
| TRANSPORTENC_ERROR transportEnc_LatmSetNrOfSubframes( HANDLE_LATM_STREAM hAss, |
| INT noSubframes_next) /* nr of access units / payloads within a latm frame */ |
| { |
| /* sanity chk */ |
| if (noSubframes_next < 1 || noSubframes_next > MAX_NR_OF_SUBFRAMES) { |
| return TRANSPORTENC_LATM_INVALID_NR_OF_SUBFRAMES; |
| } |
| |
| hAss->noSubframes_next = noSubframes_next; |
| |
| /* if at start then we can take over the value immediately, otherwise we have to wait for the next SMC */ |
| if ( (hAss->subFrameCnt == 0) && (hAss->latmFrameCounter == 0) ) { |
| hAss->noSubframes = noSubframes_next; |
| } |
| |
| return TRANSPORTENC_OK; |
| } |
| |
| static |
| int allStreamsSameTimeFraming( HANDLE_LATM_STREAM hAss, UCHAR noProgram, UCHAR noLayer[] /* return */ ) |
| { |
| int prog, layer; |
| |
| signed int lastNoSamples = -1; |
| signed int minFrameSamples = FDK_INT_MAX; |
| signed int maxFrameSamples = 0; |
| |
| signed int highestSamplingRate = -1; |
| |
| for( prog=0; prog<noProgram; prog++ ) { |
| noLayer[prog] = 0; |
| |
| for( layer=0; layer<LATM_MAX_LAYERS; layer++ ) |
| { |
| if( hAss->config[prog][layer] != NULL ) |
| { |
| INT hsfSamplesFrame; |
| |
| noLayer[prog]++; |
| |
| if( highestSamplingRate < 0 ) |
| highestSamplingRate = hAss->config[prog][layer]->samplingRate; |
| |
| hsfSamplesFrame = hAss->config[prog][layer]->samplesPerFrame * highestSamplingRate / hAss->config[prog][layer]->samplingRate; |
| |
| if( hsfSamplesFrame <= minFrameSamples ) minFrameSamples = hsfSamplesFrame; |
| if( hsfSamplesFrame >= maxFrameSamples ) maxFrameSamples = hsfSamplesFrame; |
| |
| if( lastNoSamples == -1 ) { |
| lastNoSamples = hsfSamplesFrame; |
| } else { |
| if( hsfSamplesFrame != lastNoSamples ) { |
| return 0; |
| } |
| } |
| } |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Initialize LATM/LOAS Stream and add layer 0 at program 0. |
| */ |
| static |
| TRANSPORTENC_ERROR transportEnc_InitLatmStream( HANDLE_LATM_STREAM hAss, |
| int fractDelayPresent, |
| signed int muxConfigPeriod, /* insert setup data every muxConfigPeriod frames */ |
| UINT audioMuxVersion, |
| TRANSPORT_TYPE tt |
| ) |
| { |
| TRANSPORTENC_ERROR ErrorStatus = TRANSPORTENC_OK; |
| |
| if (hAss == NULL) |
| return TRANSPORTENC_INVALID_PARAMETER; |
| |
| hAss->tt = tt; |
| |
| hAss->noProgram = 1; |
| |
| hAss->audioMuxVersion = audioMuxVersion; |
| |
| /* Fill noLayer array using hAss->config */ |
| hAss->allStreamsSameTimeFraming = allStreamsSameTimeFraming( hAss, hAss->noProgram, hAss->noLayer ); |
| /* Only allStreamsSameTimeFraming==1 is supported */ |
| FDK_ASSERT(hAss->allStreamsSameTimeFraming); |
| |
| hAss->fractDelayPresent = fractDelayPresent; |
| hAss->otherDataLenBytes = 0; |
| |
| hAss->varMode = LATMVAR_SIMPLE_SEQUENCE; |
| |
| /* initialize counters */ |
| hAss->subFrameCnt = 0; |
| hAss->noSubframes = DEFAULT_LATM_NR_OF_SUBFRAMES; |
| hAss->noSubframes_next = DEFAULT_LATM_NR_OF_SUBFRAMES; |
| |
| /* sync layer related */ |
| hAss->audioMuxLengthBytes = 0; |
| |
| hAss->latmFrameCounter = 0; |
| hAss->muxConfigPeriod = muxConfigPeriod; |
| |
| return ErrorStatus; |
| } |
| |
| |
| /** |
| * |
| */ |
| UINT transportEnc_LatmCountTotalBitDemandHeader ( HANDLE_LATM_STREAM hAss , unsigned int streamDataLength ) |
| { |
| UINT bitDemand = 0; |
| |
| switch (hAss->tt) { |
| case TT_MP4_LOAS: |
| case TT_MP4_LATM_MCP0: |
| case TT_MP4_LATM_MCP1: |
| if (hAss->subFrameCnt == 0) { |
| bitDemand = transportEnc_LatmCountFixBitDemandHeader ( hAss ); |
| } |
| bitDemand += transportEnc_LatmCountVarBitDemandHeader ( hAss , streamDataLength /*- bitDemand*/); |
| break; |
| default: |
| break; |
| } |
| |
| return bitDemand; |
| } |
| |
| static TRANSPORTENC_ERROR |
| AdvanceAudioMuxElement ( |
| HANDLE_LATM_STREAM hAss, |
| HANDLE_FDK_BITSTREAM hBs, |
| int auBits, |
| int bufferFullness, |
| CSTpCallBacks *cb |
| ) |
| { |
| TRANSPORTENC_ERROR ErrorStatus = TRANSPORTENC_OK; |
| int insertMuxSetup; |
| |
| /* Insert setup data to assemble Buffer */ |
| if (hAss->subFrameCnt == 0) |
| { |
| if (hAss->muxConfigPeriod > 0) { |
| insertMuxSetup = (hAss->latmFrameCounter == 0); |
| } else { |
| insertMuxSetup = 0; |
| } |
| |
| if (hAss->tt != TT_MP4_LATM_MCP0) { |
| if( insertMuxSetup ) { |
| FDKwriteBits( hBs, 0, 1 ); /* useSameStreamMux useNewStreamMux */ |
| CreateStreamMuxConfig(hAss, hBs, bufferFullness, cb); |
| if (ErrorStatus != TRANSPORTENC_OK) |
| return ErrorStatus; |
| } else { |
| FDKwriteBits( hBs, 1, 1 ); /* useSameStreamMux */ |
| } |
| } |
| } |
| |
| /* PayloadLengthInfo */ |
| { |
| int prog, layer; |
| |
| for (prog = 0; prog < hAss->noProgram; prog++) { |
| for (layer = 0; layer < hAss->noLayer[prog]; layer++) { |
| ErrorStatus = WriteAuPayloadLengthInfo( hBs, auBits ); |
| if (ErrorStatus != TRANSPORTENC_OK) |
| return ErrorStatus; |
| } |
| } |
| } |
| /* At this point comes the access unit. */ |
| |
| return TRANSPORTENC_OK; |
| } |
| |
| TRANSPORTENC_ERROR |
| transportEnc_LatmWrite ( |
| HANDLE_LATM_STREAM hAss, |
| HANDLE_FDK_BITSTREAM hBs, |
| int auBits, |
| int bufferFullness, |
| CSTpCallBacks *cb |
| ) |
| { |
| TRANSPORTENC_ERROR ErrorStatus; |
| |
| if (hAss->subFrameCnt == 0) { |
| /* Start new frame */ |
| FDKresetBitbuffer(hBs, BS_WRITER); |
| } |
| |
| hAss->latmSubframeStart = FDKgetValidBits(hBs); |
| |
| /* Insert syncword and syncword distance |
| - only if loas |
| - we must update the syncword distance (=audiomuxlengthbytes) later |
| */ |
| if( hAss->tt == TT_MP4_LOAS && hAss->subFrameCnt == 0) |
| { |
| /* Start new LOAS frame */ |
| FDKwriteBits( hBs, 0x2B7, 11 ); |
| hAss->audioMuxLengthBytes = 0; |
| hAss->audioMuxLengthBytesPos = FDKgetValidBits( hBs ); /* store read pointer position */ |
| FDKwriteBits( hBs, hAss->audioMuxLengthBytes, 13 ); |
| } |
| |
| ErrorStatus = AdvanceAudioMuxElement( |
| hAss, |
| hBs, |
| auBits, |
| bufferFullness, |
| cb |
| ); |
| |
| if (ErrorStatus != TRANSPORTENC_OK) |
| return ErrorStatus; |
| |
| return ErrorStatus; |
| } |
| |
| void transportEnc_LatmAdjustSubframeBits(HANDLE_LATM_STREAM hAss, |
| int *bits) |
| { |
| /* Substract bits from possible previous subframe */ |
| *bits -= hAss->latmSubframeStart; |
| /* Add fill bits */ |
| if (hAss->subFrameCnt == 0) |
| *bits += hAss->fillBits; |
| } |
| |
| |
| void transportEnc_LatmGetFrame(HANDLE_LATM_STREAM hAss, |
| HANDLE_FDK_BITSTREAM hBs, |
| int *bytes) |
| { |
| |
| hAss->subFrameCnt++; |
| if (hAss->subFrameCnt >= hAss->noSubframes) |
| { |
| |
| /* Add LOAS frame length if required. */ |
| if (hAss->tt == TT_MP4_LOAS) |
| { |
| int latmBytes; |
| |
| latmBytes = (FDKgetValidBits(hBs)+7) >> 3; |
| |
| /* write length info into assembler buffer */ |
| hAss->audioMuxLengthBytes = latmBytes - 3; /* 3=Syncword + length */ |
| { |
| FDK_BITSTREAM tmpBuf; |
| |
| FDKinitBitStream( &tmpBuf, hBs->hBitBuf.Buffer, hBs->hBitBuf.bufSize, 0, BS_WRITER ) ; |
| FDKpushFor( &tmpBuf, hAss->audioMuxLengthBytesPos ); |
| FDKwriteBits( &tmpBuf, hAss->audioMuxLengthBytes, 13 ); |
| FDKsyncCache( &tmpBuf ); |
| } |
| } |
| |
| /* Write AudioMuxElement byte alignment fill bits */ |
| FDKwriteBits(hBs, 0, hAss->fillBits); |
| |
| FDK_ASSERT( (FDKgetValidBits(hBs) % 8) == 0); |
| |
| hAss->subFrameCnt = 0; |
| |
| FDKsyncCache(hBs); |
| *bytes = (FDKgetValidBits(hBs) + 7)>>3; |
| //FDKfetchBuffer(hBs, buffer, (UINT*)bytes); |
| |
| if (hAss->muxConfigPeriod > 0) |
| { |
| hAss->latmFrameCounter++; |
| |
| if (hAss->latmFrameCounter >= hAss->muxConfigPeriod) { |
| hAss->latmFrameCounter = 0; |
| hAss->noSubframes = hAss->noSubframes_next; |
| } |
| } |
| } else { |
| /* No data this time */ |
| *bytes = 0; |
| } |
| } |
| |
| /** |
| * Init LATM/LOAS |
| */ |
| TRANSPORTENC_ERROR transportEnc_Latm_Init( |
| HANDLE_LATM_STREAM hAss, |
| HANDLE_FDK_BITSTREAM hBs, |
| CODER_CONFIG *layerConfig, |
| UINT audioMuxVersion, |
| TRANSPORT_TYPE tt, |
| CSTpCallBacks *cb |
| ) |
| { |
| TRANSPORTENC_ERROR ErrorStatus; |
| int fractDelayPresent = 0; |
| int prog, layer; |
| |
| int setupDataDistanceFrames = layerConfig->headerPeriod; |
| |
| FDK_ASSERT(setupDataDistanceFrames>=0); |
| |
| for (prog=0; prog<LATM_MAX_PROGRAMS; prog++) { |
| for (layer=0; layer<LATM_MAX_LAYERS; layer++) { |
| hAss->config[prog][layer] = NULL; |
| hAss->m_linfo[prog][layer].streamID = -1; |
| } |
| } |
| |
| hAss->config[0][0] = layerConfig; |
| hAss->m_linfo[0][0].streamID = 0; |
| |
| ErrorStatus = transportEnc_InitLatmStream( hAss, |
| fractDelayPresent, |
| setupDataDistanceFrames, |
| (audioMuxVersion)?1:0, |
| tt |
| ); |
| if (ErrorStatus != TRANSPORTENC_OK) |
| goto bail; |
| |
| ErrorStatus = transportEnc_LatmSetNrOfSubframes( |
| hAss, |
| layerConfig->nSubFrames |
| ); |
| if (ErrorStatus != TRANSPORTENC_OK) |
| goto bail; |
| |
| /* Get the size of the StreamMuxConfig somehow */ |
| AdvanceAudioMuxElement(hAss, hBs, 0, 0, cb); |
| //CreateStreamMuxConfig(hAss, hBs, 0); |
| |
| bail: |
| return ErrorStatus; |
| } |
| |
| |
| |
| |
| |
| |
