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Diffstat (limited to 'libSBRenc/src/env_bit.cpp')
| -rw-r--r-- | libSBRenc/src/env_bit.cpp | 239 |
1 files changed, 123 insertions, 116 deletions
diff --git a/libSBRenc/src/env_bit.cpp b/libSBRenc/src/env_bit.cpp index ea31183..41812ac 100644 --- a/libSBRenc/src/env_bit.cpp +++ b/libSBRenc/src/env_bit.cpp @@ -1,74 +1,85 @@ - -/* ----------------------------------------------------------------------------------------------------------- +/* ----------------------------------------------------------------------------- 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. +© 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. +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: +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 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 +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. +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. +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." +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. +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. +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. +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 @@ -79,7 +90,15 @@ Am Wolfsmantel 33 www.iis.fraunhofer.de/amm amm-info@iis.fraunhofer.de ------------------------------------------------------------------------------------------------------------ */ +----------------------------------------------------------------------------- */ + +/**************************** SBR encoder library ****************************** + + Author(s): + + Description: + +*******************************************************************************/ /*! \file @@ -89,13 +108,12 @@ amm-info@iis.fraunhofer.de #include "env_bit.h" #include "cmondata.h" - #ifndef min -#define min(a,b) ( a < b ? a:b) +#define min(a, b) (a < b ? a : b) #endif #ifndef max -#define max(a,b) ( a > b ? a:b) +#define max(a, b) (a > b ? a : b) #endif /* ***************************** crcAdvance **********************************/ @@ -107,27 +125,22 @@ amm-info@iis.fraunhofer.de * This function updates the crc register * */ -static void crcAdvance(USHORT crcPoly, - USHORT crcMask, - USHORT *crc, - ULONG bValue, - INT bBits - ) -{ +static void crcAdvance(USHORT crcPoly, USHORT crcMask, USHORT *crc, + ULONG bValue, INT bBits) { INT i; USHORT flag; - for (i=bBits-1; i>=0; i--) { - flag = ((*crc) & crcMask) ? (1) : (0) ; - flag ^= (bValue & (1<<i)) ? (1) : (0) ; + for (i = bBits - 1; i >= 0; i--) { + flag = ((*crc) & crcMask) ? (1) : (0); + flag ^= (bValue & (1 << i)) ? (1) : (0); - (*crc)<<=1; - if(flag) (*crc) ^= crcPoly; + (*crc) <<= 1; + if (flag) (*crc) ^= crcPoly; } } - -/* ***************************** FDKsbrEnc_InitSbrBitstream **********************************/ +/* ***************************** FDKsbrEnc_InitSbrBitstream + * **********************************/ /** * @fn * @brief Inittialisation of sbr bitstream, write of dummy header and CRC @@ -137,36 +150,35 @@ static void crcAdvance(USHORT crcPoly, * */ -INT FDKsbrEnc_InitSbrBitstream(HANDLE_COMMON_DATA hCmonData, - UCHAR *memoryBase, /*!< Pointer to bitstream buffer */ - INT memorySize, /*!< Length of bitstream buffer in bytes */ - HANDLE_FDK_CRCINFO hCrcInfo, - UINT sbrSyntaxFlags) /*!< SBR syntax flags */ +INT FDKsbrEnc_InitSbrBitstream( + HANDLE_COMMON_DATA hCmonData, + UCHAR *memoryBase, /*!< Pointer to bitstream buffer */ + INT memorySize, /*!< Length of bitstream buffer in bytes */ + HANDLE_FDK_CRCINFO hCrcInfo, UINT sbrSyntaxFlags) /*!< SBR syntax flags */ { INT crcRegion = 0; /* reset bit buffer */ FDKresetBitbuffer(&hCmonData->sbrBitbuf, BS_WRITER); - FDKinitBitStream(&hCmonData->tmpWriteBitbuf, memoryBase, - memorySize, 0, BS_WRITER); + FDKinitBitStream(&hCmonData->tmpWriteBitbuf, memoryBase, memorySize, 0, + BS_WRITER); if (sbrSyntaxFlags & SBR_SYNTAX_CRC) { - if (sbrSyntaxFlags & SBR_SYNTAX_DRM_CRC) - { /* Init and start CRC region */ - FDKwriteBits (&hCmonData->sbrBitbuf, 0x0, SI_SBR_DRM_CRC_BITS); - FDKcrcInit( hCrcInfo, 0x001d, 0xFFFF, SI_SBR_DRM_CRC_BITS ); - crcRegion = FDKcrcStartReg( hCrcInfo, &hCmonData->sbrBitbuf, 0 ); + if (sbrSyntaxFlags & SBR_SYNTAX_DRM_CRC) { /* Init and start CRC region */ + FDKwriteBits(&hCmonData->sbrBitbuf, 0x0, SI_SBR_DRM_CRC_BITS); + FDKcrcInit(hCrcInfo, 0x001d, 0xFFFF, SI_SBR_DRM_CRC_BITS); + crcRegion = FDKcrcStartReg(hCrcInfo, &hCmonData->sbrBitbuf, 0); } else { - FDKwriteBits (&hCmonData->sbrBitbuf, 0x0, SI_SBR_CRC_BITS); + FDKwriteBits(&hCmonData->sbrBitbuf, 0x0, SI_SBR_CRC_BITS); } } return (crcRegion); } - -/* ************************** FDKsbrEnc_AssembleSbrBitstream *******************************/ +/* ************************** FDKsbrEnc_AssembleSbrBitstream + * *******************************/ /** * @fn * @brief Formats the SBR payload @@ -176,48 +188,43 @@ INT FDKsbrEnc_InitSbrBitstream(HANDLE_COMMON_DATA hCmonData, * */ -void -FDKsbrEnc_AssembleSbrBitstream( HANDLE_COMMON_DATA hCmonData, - HANDLE_FDK_CRCINFO hCrcInfo, - INT crcRegion, - UINT sbrSyntaxFlags) -{ - USHORT crcReg = SBR_CRCINIT; - INT numCrcBits,i; +void FDKsbrEnc_AssembleSbrBitstream(HANDLE_COMMON_DATA hCmonData, + HANDLE_FDK_CRCINFO hCrcInfo, INT crcRegion, + UINT sbrSyntaxFlags) { + USHORT crcReg = SBR_CRCINIT; + INT numCrcBits, i; /* check if SBR is present */ - if ( hCmonData==NULL ) - return; + if (hCmonData == NULL) return; hCmonData->sbrFillBits = 0; /* Fill bits are written only for GA streams */ - if ( sbrSyntaxFlags & SBR_SYNTAX_DRM_CRC ) - { + if (sbrSyntaxFlags & SBR_SYNTAX_DRM_CRC) { /* * Calculate and write DRM CRC */ - FDKcrcEndReg( hCrcInfo, &hCmonData->sbrBitbuf, crcRegion ); - FDKwriteBits( &hCmonData->tmpWriteBitbuf, FDKcrcGetCRC(hCrcInfo)^0xFF, SI_SBR_DRM_CRC_BITS ); - } - else - { - if ( !(sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY) ) - { - /* Do alignment here, because its defined as part of the sbr_extension_data */ + FDKcrcEndReg(hCrcInfo, &hCmonData->sbrBitbuf, crcRegion); + FDKwriteBits(&hCmonData->tmpWriteBitbuf, FDKcrcGetCRC(hCrcInfo) ^ 0xFF, + SI_SBR_DRM_CRC_BITS); + } else { + if (!(sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY)) { + /* Do alignment here, because its defined as part of the + * sbr_extension_data */ int sbrLoad = hCmonData->sbrHdrBits + hCmonData->sbrDataBits; - if ( sbrSyntaxFlags & SBR_SYNTAX_CRC ) { + if (sbrSyntaxFlags & SBR_SYNTAX_CRC) { sbrLoad += SI_SBR_CRC_BITS; } - sbrLoad += 4; /* Do byte Align with 4 bit offset. ISO/IEC 14496-3:2005(E) page 39. */ + sbrLoad += 4; /* Do byte Align with 4 bit offset. ISO/IEC 14496-3:2005(E) + page 39. */ hCmonData->sbrFillBits = (8 - (sbrLoad % 8)) % 8; /* append fill bits */ - FDKwriteBits(&hCmonData->sbrBitbuf, 0, hCmonData->sbrFillBits ); + FDKwriteBits(&hCmonData->sbrBitbuf, 0, hCmonData->sbrFillBits); FDK_ASSERT(FDKgetValidBits(&hCmonData->sbrBitbuf) % 8 == 4); } @@ -225,26 +232,26 @@ FDKsbrEnc_AssembleSbrBitstream( HANDLE_COMMON_DATA hCmonData, /* calculate crc */ - if ( sbrSyntaxFlags & SBR_SYNTAX_CRC ) { - FDK_BITSTREAM tmpCRCBuf = hCmonData->sbrBitbuf; - FDKresetBitbuffer( &tmpCRCBuf, BS_READER ); + if (sbrSyntaxFlags & SBR_SYNTAX_CRC) { + FDK_BITSTREAM tmpCRCBuf = hCmonData->sbrBitbuf; + FDKresetBitbuffer(&tmpCRCBuf, BS_READER); - numCrcBits = hCmonData->sbrHdrBits + hCmonData->sbrDataBits + hCmonData->sbrFillBits; + numCrcBits = hCmonData->sbrHdrBits + hCmonData->sbrDataBits + + hCmonData->sbrFillBits; - for(i=0;i<numCrcBits;i++){ + for (i = 0; i < numCrcBits; i++) { INT bit; - bit = FDKreadBits(&tmpCRCBuf,1); - crcAdvance(SBR_CRC_POLY,SBR_CRC_MASK,&crcReg,bit,1); + bit = FDKreadBits(&tmpCRCBuf, 1); + crcAdvance(SBR_CRC_POLY, SBR_CRC_MASK, &crcReg, bit, 1); } crcReg &= (SBR_CRC_RANGE); /* * Write CRC data. */ - FDKwriteBits (&hCmonData->tmpWriteBitbuf, crcReg, SI_SBR_CRC_BITS); + FDKwriteBits(&hCmonData->tmpWriteBitbuf, crcReg, SI_SBR_CRC_BITS); } } FDKsyncCache(&hCmonData->tmpWriteBitbuf); } - |