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Diffstat (limited to 'libSBRdec/src/sbr_crc.cpp')
| -rw-r--r-- | libSBRdec/src/sbr_crc.cpp | 173 |
1 files changed, 91 insertions, 82 deletions
diff --git a/libSBRdec/src/sbr_crc.cpp b/libSBRdec/src/sbr_crc.cpp index a495f10..ba0fd05 100644 --- a/libSBRdec/src/sbr_crc.cpp +++ b/libSBRdec/src/sbr_crc.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 @@ -79,11 +90,19 @@ Am Wolfsmantel 33 www.iis.fraunhofer.de/amm amm-info@iis.fraunhofer.de ------------------------------------------------------------------------------------------------------------ */ +----------------------------------------------------------------------------- */ + +/**************************** SBR decoder library ****************************** + + Author(s): + + Description: + +*******************************************************************************/ /*! \file - \brief CRC check coutines + \brief CRC check coutines */ #include "sbr_crc.h" @@ -91,15 +110,13 @@ amm-info@iis.fraunhofer.de #include "FDK_bitstream.h" #include "transcendent.h" -#define MAXCRCSTEP 16 -#define MAXCRCSTEP_LD 4 +#define MAXCRCSTEP 16 +#define MAXCRCSTEP_LD 4 /*! \brief crc calculation */ -static ULONG -calcCRC (HANDLE_CRC hCrcBuf, ULONG bValue, int nBits) -{ +static ULONG calcCRC(HANDLE_CRC hCrcBuf, ULONG bValue, int nBits) { int i; ULONG bMask = (1UL << (nBits - 1)); @@ -109,52 +126,45 @@ calcCRC (HANDLE_CRC hCrcBuf, ULONG bValue, int nBits) flag ^= flag1; hCrcBuf->crcState <<= 1; - if (flag) - hCrcBuf->crcState ^= hCrcBuf->crcPoly; + if (flag) hCrcBuf->crcState ^= hCrcBuf->crcPoly; } return (hCrcBuf->crcState); } - /*! \brief crc */ -static int -getCrc (HANDLE_FDK_BITSTREAM hBs, ULONG NrBits) -{ +static int getCrc(HANDLE_FDK_BITSTREAM hBs, ULONG NrBits) { int i; CRC_BUFFER CrcBuf; CrcBuf.crcState = SBR_CRC_START; - CrcBuf.crcPoly = SBR_CRC_POLY; - CrcBuf.crcMask = SBR_CRC_MASK; + CrcBuf.crcPoly = SBR_CRC_POLY; + CrcBuf.crcMask = SBR_CRC_MASK; - int CrcStep = NrBits>>MAXCRCSTEP_LD; + int CrcStep = NrBits >> MAXCRCSTEP_LD; int CrcNrBitsRest = (NrBits - CrcStep * MAXCRCSTEP); ULONG bValue; for (i = 0; i < CrcStep; i++) { - bValue = FDKreadBits (hBs, MAXCRCSTEP); - calcCRC (&CrcBuf, bValue, MAXCRCSTEP); + bValue = FDKreadBits(hBs, MAXCRCSTEP); + calcCRC(&CrcBuf, bValue, MAXCRCSTEP); } - bValue = FDKreadBits (hBs, CrcNrBitsRest); - calcCRC (&CrcBuf, bValue, CrcNrBitsRest); + bValue = FDKreadBits(hBs, CrcNrBitsRest); + calcCRC(&CrcBuf, bValue, CrcNrBitsRest); return (CrcBuf.crcState & SBR_CRC_RANGE); - } - /*! \brief crc interface \return 1: CRC OK, 0: CRC check failure */ -int -SbrCrcCheck (HANDLE_FDK_BITSTREAM hBs, /*!< handle to bit-buffer */ - LONG NrBits) /*!< max. CRC length */ +int SbrCrcCheck(HANDLE_FDK_BITSTREAM hBs, /*!< handle to bit-buffer */ + LONG NrBits) /*!< max. CRC length */ { int crcResult = 1; ULONG NrCrcBits; @@ -162,18 +172,17 @@ SbrCrcCheck (HANDLE_FDK_BITSTREAM hBs, /*!< handle to bit-buffer */ LONG NrBitsAvailable; ULONG crcCheckSum; - crcCheckSum = FDKreadBits (hBs, 10); + crcCheckSum = FDKreadBits(hBs, 10); NrBitsAvailable = FDKgetValidBits(hBs); - if (NrBitsAvailable <= 0){ + if (NrBitsAvailable <= 0) { return 0; } - NrCrcBits = fixMin ((INT)NrBits, (INT)NrBitsAvailable); - - crcCheckResult = getCrc (hBs, NrCrcBits); - FDKpushBack(hBs, (NrBitsAvailable - FDKgetValidBits(hBs)) ); + NrCrcBits = fixMin((INT)NrBits, (INT)NrBitsAvailable); + crcCheckResult = getCrc(hBs, NrCrcBits); + FDKpushBack(hBs, (NrBitsAvailable - FDKgetValidBits(hBs))); if (crcCheckResult != crcCheckSum) { crcResult = 0; |