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Diffstat (limited to 'libMpegTPEnc/src/tpenc_adif.cpp')
| -rw-r--r-- | libMpegTPEnc/src/tpenc_adif.cpp | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/libMpegTPEnc/src/tpenc_adif.cpp b/libMpegTPEnc/src/tpenc_adif.cpp new file mode 100644 index 0000000..06bd30b --- /dev/null +++ b/libMpegTPEnc/src/tpenc_adif.cpp @@ -0,0 +1,182 @@ + +/* ----------------------------------------------------------------------------------------------------------- +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 +----------------------------------------------------------------------------------------------------------- */ + +/******************************** MPEG Audio Encoder ************************** + + contents/description: ADIF Transport Headers writing + +******************************************************************************/ + +#include "tpenc_adif.h" + +#include "tpenc_lib.h" +#include "tpenc_asc.h" + + + +int adifWrite_EncodeHeader(ADIF_INFO *adif, + HANDLE_FDK_BITSTREAM hBs, + INT adif_buffer_fullness) +{ + /* ADIF/PCE/ADTS definitions */ + const char adifId[5]="ADIF"; + const int copyRightIdPresent=0; + const int originalCopy=0; + const int home=0; + + int i; + + INT sampleRate = adif->samplingRate; + INT totalBitRate = adif->bitRate; + + if (adif->headerWritten) + return 0; + + /* Align inside PCE with respect to the first bit of the header */ + UINT alignAnchor = FDKgetValidBits(hBs); + + /* Signal variable bitrate if buffer fullnes exceeds 20 bit */ + adif->bVariableRate = ( adif_buffer_fullness >= (INT)(0x1<<20) ) ? 1 : 0; + + FDKwriteBits(hBs, adifId[0],8); + FDKwriteBits(hBs, adifId[1],8); + FDKwriteBits(hBs, adifId[2],8); + FDKwriteBits(hBs, adifId[3],8); + + + FDKwriteBits(hBs, copyRightIdPresent ? 1:0,1); + + if(copyRightIdPresent) { + for(i=0;i<72;i++) { + FDKwriteBits(hBs,0,1); + } + } + FDKwriteBits(hBs, originalCopy ? 1:0,1); + FDKwriteBits(hBs, home ? 1:0,1); + FDKwriteBits(hBs, adif->bVariableRate?1:0, 1); + FDKwriteBits(hBs, totalBitRate,23); + + /* we write only one PCE at the moment */ + FDKwriteBits(hBs, 0, 4); + + if(!adif->bVariableRate) { + FDKwriteBits(hBs, adif_buffer_fullness, 20); + } + + /* Write PCE */ + transportEnc_writePCE(hBs, adif->cm, sampleRate, adif->instanceTag, adif->profile, 0, 0, alignAnchor); + + return 0; +} + +int adifWrite_GetHeaderBits(ADIF_INFO *adif) +{ + /* ADIF definitions */ + const int copyRightIdPresent=0; + + if (adif->headerWritten) + return 0; + + int bits = 0; + + bits += 8*4; /* ADIF ID */ + + bits += 1; /* Copyright present */ + + if (copyRightIdPresent) + bits += 72; /* Copyright ID */ + + bits += 26; + + bits += 4; /* Number of PCE's */ + + if(!adif->bVariableRate) { + bits += 20; + } + + /* write PCE */ + bits = transportEnc_GetPCEBits(adif->cm, 0, bits); + + return bits; +} + |