| /* ----------------------------------------------------------------------------- |
| Software License for The Fraunhofer FDK AAC Codec Library for Android |
| |
| © Copyright 1995 - 2018 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 transport format encoder library ********************* |
| |
| 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 += hAss->otherDataLenBits; |
| |
| /* 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->taraBufferFullness = 0xFF; |
| 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)) { |
| const UINT alignAnchor = FDKgetValidBits(hBs); |
| |
| if (0 != |
| (transportEnc_writeASC(hBs, hAss->config[prog][layer], cb))) { |
| return TRANSPORTENC_UNKOWN_ERROR; |
| } |
| |
| if (hAss->audioMuxVersion == 1) { |
| UINT ascLen = transportEnc_LatmWriteValue(hBs, 0); |
| FDKbyteAlign(hBs, alignAnchor); |
| ascLen = FDKgetValidBits(hBs) - alignAnchor - ascLen; |
| FDKpushBack(hBs, FDKgetValidBits(hBs) - alignAnchor); |
| |
| transportEnc_LatmWriteValue(hBs, ascLen); |
| |
| if (0 != |
| (transportEnc_writeASC(hBs, hAss->config[prog][layer], cb))) { |
| return TRANSPORTENC_UNKOWN_ERROR; |
| } |
| |
| FDKbyteAlign(hBs, alignAnchor); /* asc length fillbits */ |
| } |
| |
| hAss->streamMuxConfigBits += |
| FDKgetValidBits(hBs) - |
| alignAnchor; /* 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: |
| 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->otherDataLenBits > 0) ? 1 : 0, |
| 1); /* otherDataPresent */ |
| hAss->streamMuxConfigBits += 1; |
| |
| if (hAss->otherDataLenBits > 0) { |
| FDKwriteBits(hBs, 0, 1); |
| FDKwriteBits(hBs, hAss->otherDataLenBits, 8); |
| hAss->streamMuxConfigBits += 9; |
| } |
| |
| FDKwriteBits(hBs, 0, 1); /* crcCheckPresent=0 */ |
| hAss->streamMuxConfigBits += 1; |
| |
| } 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->otherDataLenBits = 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 */ |
| if (TRANSPORTENC_OK != (ErrorStatus = CreateStreamMuxConfig( |
| hAss, hBs, bufferFullness, cb))) { |
| 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->otherDataLenBits; |
| *bits += hAss->fillBits; |
| } |
| } |
| |
| TRANSPORTENC_ERROR transportEnc_LatmGetFrame(HANDLE_LATM_STREAM hAss, |
| HANDLE_FDK_BITSTREAM hBs, |
| int *pBytes) { |
| TRANSPORTENC_ERROR ErrorStatus = TRANSPORTENC_OK; |
| |
| hAss->subFrameCnt++; |
| if (hAss->subFrameCnt >= hAss->noSubframes) { |
| /* Add LOAS frame length if required. */ |
| if (hAss->tt == TT_MP4_LOAS) { |
| FDK_BITSTREAM tmpBuf; |
| |
| /* Determine frame length info */ |
| hAss->audioMuxLengthBytes = |
| ((FDKgetValidBits(hBs) + hAss->otherDataLenBits + 7) >> 3) - |
| 3; /* 3=Syncword + length */ |
| |
| /* Check frame length info */ |
| if (hAss->audioMuxLengthBytes >= (1 << 13)) { |
| ErrorStatus = TRANSPORTENC_INVALID_AU_LENGTH; |
| goto bail; |
| } |
| |
| /* Write length info into assembler buffer */ |
| FDKinitBitStream(&tmpBuf, hBs->hBitBuf.Buffer, hBs->hBitBuf.bufSize, 0, |
| BS_WRITER); |
| FDKpushFor(&tmpBuf, hAss->audioMuxLengthBytesPos); |
| FDKwriteBits(&tmpBuf, hAss->audioMuxLengthBytes, 13); |
| FDKsyncCache(&tmpBuf); |
| } |
| |
| /* Write AudioMuxElement other data bits */ |
| FDKwriteBits(hBs, 0, hAss->otherDataLenBits); |
| |
| /* Write AudioMuxElement byte alignment fill bits */ |
| FDKwriteBits(hBs, 0, hAss->fillBits); |
| |
| FDK_ASSERT((FDKgetValidBits(hBs) % 8) == 0); |
| |
| hAss->subFrameCnt = 0; |
| |
| FDKsyncCache(hBs); |
| *pBytes = (FDKgetValidBits(hBs) + 7) >> 3; |
| |
| if (hAss->muxConfigPeriod > 0) { |
| hAss->latmFrameCounter++; |
| |
| if (hAss->latmFrameCounter >= hAss->muxConfigPeriod) { |
| hAss->latmFrameCounter = 0; |
| hAss->noSubframes = hAss->noSubframes_next; |
| } |
| } |
| } else { |
| /* No data this time */ |
| *pBytes = 0; |
| } |
| |
| bail: |
| return ErrorStatus; |
| } |
| |
| /** |
| * 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 */ |
| if (TRANSPORTENC_OK != |
| (ErrorStatus = AdvanceAudioMuxElement(hAss, hBs, 0, 0, cb))) { |
| goto bail; |
| } |
| |
| // CreateStreamMuxConfig(hAss, hBs, 0); |
| |
| bail: |
| return ErrorStatus; |
| } |
| |
| TRANSPORTENC_ERROR transportEnc_LatmAddOtherDataBits(HANDLE_LATM_STREAM hAss, |
| const int otherDataBits) { |
| TRANSPORTENC_ERROR ErrorStatus = TRANSPORTENC_OK; |
| |
| if ((hAss->otherDataLenBits != 0) || (otherDataBits % 8 != 0)) { |
| /* This implementation allows to add other data bits only once. |
| To keep existing alignment only whole bytes are allowed. */ |
| ErrorStatus = TRANSPORTENC_UNKOWN_ERROR; |
| } else { |
| /* Ensure correct addional bits in payload. */ |
| if (hAss->tt == TT_MP4_LATM_MCP0) { |
| hAss->otherDataLenBits = otherDataBits; |
| } else { |
| hAss->otherDataLenBits = otherDataBits - 9; |
| hAss->streamMuxConfigBits += 9; |
| } |
| } |
| |
| return ErrorStatus; |
| } |
