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Diffstat (limited to 'libMpegTPEnc/src/tpenc_adts.cpp')
| -rw-r--r-- | libMpegTPEnc/src/tpenc_adts.cpp | 315 |
1 files changed, 0 insertions, 315 deletions
diff --git a/libMpegTPEnc/src/tpenc_adts.cpp b/libMpegTPEnc/src/tpenc_adts.cpp deleted file mode 100644 index f4f3178..0000000 --- a/libMpegTPEnc/src/tpenc_adts.cpp +++ /dev/null @@ -1,315 +0,0 @@ - -/* ----------------------------------------------------------------------------------------------------------- -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 Audio Encoder ************************** - - Initial author: Alex Groeschel - contents/description: ADTS Transport Headers support - -******************************************************************************/ - -#include "tpenc_adts.h" - - -#include "tpenc_lib.h" -#include "tpenc_asc.h" - - -int adtsWrite_CrcStartReg( - HANDLE_ADTS pAdts, /*!< pointer to adts stucture */ - HANDLE_FDK_BITSTREAM hBs, /*!< handle to current bit buffer structure */ - int mBits /*!< number of bits in crc region */ - ) -{ - if (pAdts->protection_absent) { - return 0; - } - return ( FDKcrcStartReg(&pAdts->crcInfo, hBs, mBits) ); -} - -void adtsWrite_CrcEndReg( - HANDLE_ADTS pAdts, /*!< pointer to adts crc info stucture */ - HANDLE_FDK_BITSTREAM hBs, /*!< handle to current bit buffer structure */ - int reg /*!< crc region */ - ) -{ - if (pAdts->protection_absent == 0) - { - FDKcrcEndReg(&pAdts->crcInfo, hBs, reg); - } -} - -int adtsWrite_GetHeaderBits( HANDLE_ADTS hAdts ) -{ - int bits = 0; - - if (hAdts->currentBlock == 0) { - /* Static and variable header bits */ - bits = 56; - if (!hAdts->protection_absent) { - /* Add header/ single raw data block CRC bits */ - bits += 16; - if (hAdts->num_raw_blocks>0) { - /* Add bits of raw data block position markers */ - bits += (hAdts->num_raw_blocks)*16; - } - } - } - if (!hAdts->protection_absent && hAdts->num_raw_blocks>0) { - /* Add raw data block CRC bits. Not really part of the header, put they cause bit overhead to be accounted. */ - bits += 16; - } - - hAdts->headerBits = bits; - - return bits; -} - -INT adtsWrite_Init(HANDLE_ADTS hAdts, CODER_CONFIG *config) -{ - /* Sanity checks */ - if ( config->nSubFrames < 1 - || config->nSubFrames > 4 - || (int)config->aot > 4 - || (int)config->aot < 1 ) { - return -1; - } - - /* fixed header */ - if (config->flags & CC_MPEG_ID) { - hAdts->mpeg_id = 0; /* MPEG 4 */ - } else { - hAdts->mpeg_id = 1; /* MPEG 2 */ - } - hAdts->layer=0; - hAdts->protection_absent = ! (config->flags & CC_PROTECTION); - hAdts->profile = ((int)config->aot) - 1; - hAdts->sample_freq_index = getSamplingRateIndex(config->samplingRate); - hAdts->sample_freq = config->samplingRate; - hAdts->private_bit=0; - hAdts->channel_mode = config->channelMode; - hAdts->original=0; - hAdts->home=0; - /* variable header */ - hAdts->copyright_id=0; - hAdts->copyright_start=0; - - hAdts->num_raw_blocks=config->nSubFrames-1; /* 0 means 1 raw data block */ - - FDKcrcInit(&hAdts->crcInfo, 0x8005, 0xFFFF, 16); - - hAdts->currentBlock = 0; - - - return 0; -} - -int adtsWrite_EncodeHeader(HANDLE_ADTS hAdts, - HANDLE_FDK_BITSTREAM hBitStream, - int buffer_fullness, - int frame_length) -{ - INT crcIndex = 0; - - - hAdts->headerBits = adtsWrite_GetHeaderBits(hAdts); - - FDK_ASSERT(((frame_length+hAdts->headerBits)/8)<0x2000); /*13 bit*/ - FDK_ASSERT(buffer_fullness<0x800); /* 11 bit */ - - if (!hAdts->protection_absent) { - FDKcrcReset(&hAdts->crcInfo); - } - - if (hAdts->currentBlock == 0) { - FDKresetBitbuffer(hBitStream, BS_WRITER); - } - - hAdts->subFrameStartBit = FDKgetValidBits(hBitStream); - - /* Skip new header if this is raw data block 1..n */ - if (hAdts->currentBlock == 0) - { - FDKresetBitbuffer(hBitStream, BS_WRITER); - - if (hAdts->num_raw_blocks == 0) { - crcIndex = adtsWrite_CrcStartReg(hAdts, hBitStream, 0); - } - - /* fixed header */ - FDKwriteBits(hBitStream, 0xFFF, 12); - FDKwriteBits(hBitStream, hAdts->mpeg_id, 1); - FDKwriteBits(hBitStream, hAdts->layer, 2); - FDKwriteBits(hBitStream, hAdts->protection_absent, 1); - FDKwriteBits(hBitStream, hAdts->profile, 2); - FDKwriteBits(hBitStream, hAdts->sample_freq_index, 4); - FDKwriteBits(hBitStream, hAdts->private_bit, 1); - FDKwriteBits(hBitStream, getChannelConfig(hAdts->channel_mode), 3); - FDKwriteBits(hBitStream, hAdts->original, 1); - FDKwriteBits(hBitStream, hAdts->home, 1); - /* variable header */ - FDKwriteBits(hBitStream, hAdts->copyright_id, 1); - FDKwriteBits(hBitStream, hAdts->copyright_start, 1); - FDKwriteBits(hBitStream, (frame_length + hAdts->headerBits)>>3, 13); - FDKwriteBits(hBitStream, buffer_fullness, 11); - FDKwriteBits(hBitStream, hAdts->num_raw_blocks, 2); - - if (!hAdts->protection_absent) { - int i; - - /* End header CRC portion for single raw data block and write dummy zero values for unknown fields. */ - if (hAdts->num_raw_blocks == 0) { - adtsWrite_CrcEndReg(hAdts, hBitStream, crcIndex); - } else { - for (i=0; i<hAdts->num_raw_blocks; i++) { - FDKwriteBits(hBitStream, 0, 16); - } - } - FDKwriteBits(hBitStream, 0, 16); - } - } /* End of ADTS header */ - - return 0; -} - -void adtsWrite_EndRawDataBlock(HANDLE_ADTS hAdts, - HANDLE_FDK_BITSTREAM hBs, - int *pBits) -{ - if (!hAdts->protection_absent) { - FDK_BITSTREAM bsWriter; - - FDKinitBitStream(&bsWriter, hBs->hBitBuf.Buffer, hBs->hBitBuf.bufSize, 0, BS_WRITER); - FDKpushFor(&bsWriter, 56); - - if (hAdts->num_raw_blocks == 0) { - FDKwriteBits(&bsWriter, FDKcrcGetCRC(&hAdts->crcInfo), 16); - } else { - int distance; - - /* Write CRC of current raw data block */ - FDKwriteBits(hBs, FDKcrcGetCRC(&hAdts->crcInfo), 16); - - /* Write distance to current data block */ - if (hAdts->currentBlock < hAdts->num_raw_blocks) { - FDKpushFor(&bsWriter, hAdts->currentBlock*16); - distance = FDKgetValidBits(hBs) - (56 + (hAdts->num_raw_blocks)*16 + 16); - FDKwriteBits(&bsWriter, distance>>3, 16); - } - } - FDKsyncCache(&bsWriter); - } - - /* Write total frame lenth for multiple raw data blocks and header CRC */ - if (hAdts->num_raw_blocks > 0 && hAdts->currentBlock == hAdts->num_raw_blocks) { - FDK_BITSTREAM bsWriter; - int crcIndex = 0; - - FDKinitBitStream(&bsWriter, hBs->hBitBuf.Buffer, hBs->hBitBuf.bufSize, 0, BS_WRITER); - - if (!hAdts->protection_absent) { - FDKcrcReset(&hAdts->crcInfo); - crcIndex = FDKcrcStartReg(&hAdts->crcInfo, &bsWriter, 0); - } - /* Write total frame length */ - FDKpushFor(&bsWriter, 56-28+2); - FDKwriteBits(&bsWriter, FDKgetValidBits(hBs)>>3, 13); - - /* Write header CRC */ - if (!hAdts->protection_absent) { - FDKpushFor(&bsWriter, 11+2 + (hAdts->num_raw_blocks)*16); - FDKcrcEndReg(&hAdts->crcInfo, &bsWriter, crcIndex); - FDKwriteBits(&bsWriter, FDKcrcGetCRC(&hAdts->crcInfo), 16); - } - FDKsyncCache(&bsWriter); - } - - /* Correct *pBits to reflect the amount of bits of the current subframe */ - *pBits -= hAdts->subFrameStartBit; - if (!hAdts->protection_absent && hAdts->num_raw_blocks > 0) { - /* Fixup CRC bits, since they come after each raw data block */ - *pBits += 16; - } - hAdts->currentBlock++; -} - |