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Diffstat (limited to 'libSBRenc/src/env_bit.cpp')
| -rw-r--r-- | libSBRenc/src/env_bit.cpp | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/libSBRenc/src/env_bit.cpp b/libSBRenc/src/env_bit.cpp deleted file mode 100644 index ea31183..0000000 --- a/libSBRenc/src/env_bit.cpp +++ /dev/null @@ -1,250 +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 ------------------------------------------------------------------------------------------------------------ */ - -/*! - \file - \brief Remaining SBR Bit Writing Routines -*/ - -#include "env_bit.h" -#include "cmondata.h" - - -#ifndef min -#define min(a,b) ( a < b ? a:b) -#endif - -#ifndef max -#define max(a,b) ( a > b ? a:b) -#endif - -/* ***************************** crcAdvance **********************************/ -/** - * @fn - * @brief updates crc data register - * @return none - * - * This function updates the crc register - * - */ -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) ; - - (*crc)<<=1; - if(flag) (*crc) ^= crcPoly; - } -} - - -/* ***************************** FDKsbrEnc_InitSbrBitstream **********************************/ -/** - * @fn - * @brief Inittialisation of sbr bitstream, write of dummy header and CRC - * @return none - * - * - * - */ - -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); - - 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 ); - } else { - FDKwriteBits (&hCmonData->sbrBitbuf, 0x0, SI_SBR_CRC_BITS); - } - } - - return (crcRegion); -} - - -/* ************************** FDKsbrEnc_AssembleSbrBitstream *******************************/ -/** - * @fn - * @brief Formats the SBR payload - * @return nothing - * - * Also the CRC will be calculated here. - * - */ - -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; - - hCmonData->sbrFillBits = 0; /* Fill bits are written only for GA streams */ - - 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 */ - int sbrLoad = hCmonData->sbrHdrBits + hCmonData->sbrDataBits; - - 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. */ - - hCmonData->sbrFillBits = (8 - (sbrLoad % 8)) % 8; - - /* - append fill bits - */ - FDKwriteBits(&hCmonData->sbrBitbuf, 0, hCmonData->sbrFillBits ); - - FDK_ASSERT(FDKgetValidBits(&hCmonData->sbrBitbuf) % 8 == 4); - } - - /* - calculate crc - */ - if ( sbrSyntaxFlags & SBR_SYNTAX_CRC ) { - FDK_BITSTREAM tmpCRCBuf = hCmonData->sbrBitbuf; - FDKresetBitbuffer( &tmpCRCBuf, BS_READER ); - - numCrcBits = hCmonData->sbrHdrBits + hCmonData->sbrDataBits + hCmonData->sbrFillBits; - - for(i=0;i<numCrcBits;i++){ - INT bit; - 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); - } - } - - FDKsyncCache(&hCmonData->tmpWriteBitbuf); -} - |