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Diffstat (limited to 'libFDK/src/FDK_bitbuffer.cpp')
| -rw-r--r-- | libFDK/src/FDK_bitbuffer.cpp | 480 |
1 files changed, 0 insertions, 480 deletions
diff --git a/libFDK/src/FDK_bitbuffer.cpp b/libFDK/src/FDK_bitbuffer.cpp deleted file mode 100644 index 680ceae..0000000 --- a/libFDK/src/FDK_bitbuffer.cpp +++ /dev/null @@ -1,480 +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 ------------------------------------------------------------------------------------------------------------ */ - -/*************************** Fraunhofer IIS FDK Tools *********************** - - Author(s): M. Lohwasser - Description: common bitbuffer read/write routines - -******************************************************************************/ - -#include "FDK_bitbuffer.h" - - - - -#include "genericStds.h" -#include "common_fix.h" -#include "fixminmax.h" - -const UINT BitMask [32+1] = -{ - 0x0, 0x1, 0x3, 0x7, - 0xf, 0x1f, 0x3f, 0x7f, - 0xff, 0x1ff, 0x3ff, 0x7ff, - 0xfff, 0x1fff, 0x3fff, 0x7fff, - 0xffff, 0x1ffff, 0x3ffff, 0x7ffff, - 0xfffff, 0x1fffff, 0x3fffff, 0x7fffff, - 0xffffff, 0x1ffffff, 0x3ffffff, 0x7ffffff, - 0xfffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff, - 0xffffffff -}; - -const UINT *const RESTRICT pBitMask = BitMask; - -void FDK_CreateBitBuffer (HANDLE_FDK_BITBUF *hBitBuf, UCHAR *pBuffer, - UINT bufSize) -{ - FDK_InitBitBuffer (*hBitBuf, pBuffer, bufSize, 0); - - FDKmemclear((*hBitBuf)->Buffer, bufSize*sizeof(UCHAR)); -} - -void FDK_DeleteBitBuffer (HANDLE_FDK_BITBUF hBitBuf) { ; } - -void FDK_InitBitBuffer (HANDLE_FDK_BITBUF hBitBuf, UCHAR *pBuffer, - UINT bufSize, UINT validBits) -{ - hBitBuf->ValidBits = validBits ; - hBitBuf->ReadOffset = 0 ; - hBitBuf->WriteOffset = 0 ; - hBitBuf->BitCnt = 0 ; - hBitBuf->BitNdx = 0 ; - - hBitBuf->Buffer = pBuffer ; - hBitBuf->bufSize = bufSize ; - hBitBuf->bufBits = (bufSize << 3) ; -#if defined(FDK_DEBUG) || defined(DEBUG) - /*assure bufsize (2^n) */ - if (bufSize!=0) { - UINT x = 0, n=bufSize; - for (x=0; n>0; x++,n>>=1) {} - if ( bufSize != (1<<(x-1)) ) { - FDKprintfErr("Error: bufSizein FDK_InitBitBuffer() != (2^n), %d\n", bufSize); - } - } -#endif -} - -void FDK_ResetBitBuffer ( HANDLE_FDK_BITBUF hBitBuf ) -{ - hBitBuf->ValidBits = 0 ; - hBitBuf->ReadOffset = 0 ; - hBitBuf->WriteOffset = 0 ; - hBitBuf->BitCnt = 0 ; - hBitBuf->BitNdx = 0 ; -} - -INT FDK_get (HANDLE_FDK_BITBUF hBitBuf, const UINT numberOfBits) -{ - UINT byteOffset = hBitBuf->BitNdx >> 3 ; - UINT bitOffset = hBitBuf->BitNdx & 0x07 ; - - hBitBuf->BitNdx = (hBitBuf->BitNdx + numberOfBits) & (hBitBuf->bufBits - 1) ; - hBitBuf->BitCnt += numberOfBits ; - hBitBuf->ValidBits -= numberOfBits ; - - UINT byteMask = hBitBuf->bufSize - 1 ; - - UINT tx = (hBitBuf->Buffer [ byteOffset & byteMask] << 24) | - (hBitBuf->Buffer [(byteOffset+1) & byteMask] << 16) | - (hBitBuf->Buffer [(byteOffset+2) & byteMask] << 8) | - hBitBuf->Buffer [(byteOffset+3) & byteMask]; - - if (bitOffset) - { - tx <<= bitOffset; - tx |= hBitBuf->Buffer [(byteOffset+4) & byteMask] >> (8-bitOffset); - } - - return (tx >> (32 - numberOfBits)) ; -} - -INT FDK_get32 (HANDLE_FDK_BITBUF hBitBuf) -{ - UINT BitNdx = hBitBuf->BitNdx + 32; - if (BitNdx <= hBitBuf->bufBits) - { - hBitBuf->BitNdx = BitNdx; - hBitBuf->BitCnt += 32; - hBitBuf->ValidBits -= 32; - - UINT byteOffset = (BitNdx-1) >> 3; - UINT cache = (hBitBuf->Buffer[(byteOffset-3)] << 24) | - (hBitBuf->Buffer[(byteOffset-2)] << 16) | - (hBitBuf->Buffer[(byteOffset-1)] << 8) | - hBitBuf->Buffer[(byteOffset-0)]; - - if ( (BitNdx = (BitNdx&7)) != 0 ) { - cache = (cache >> (8-BitNdx)) | ((UINT)hBitBuf->Buffer [byteOffset-4] << (24+BitNdx)); - } - return (cache) ; - } - else - { - /* exotic path, used only at the end of the buffer, when wrapping around */ - int nBits = (INT)hBitBuf->bufBits-(INT)hBitBuf->BitNdx; - - UINT cache = FDK_get (hBitBuf,nBits)<< (32-nBits); - cache |= (FDK_get (hBitBuf,32-nBits)); - return (cache); - } -} - -INT FDK_getBwd (HANDLE_FDK_BITBUF hBitBuf, const UINT numberOfBits) -{ - UINT byteOffset = hBitBuf->BitNdx >> 3 ; - UINT bitOffset = hBitBuf->BitNdx & 0x07 ; - UINT byteMask = hBitBuf->bufSize - 1 ; - int i; - - hBitBuf->BitNdx = (hBitBuf->BitNdx - numberOfBits) & (hBitBuf->bufBits - 1) ; - hBitBuf->BitCnt -= numberOfBits ; - hBitBuf->ValidBits += numberOfBits ; - - UINT tx = hBitBuf->Buffer [(byteOffset-3) & byteMask] << 24 | - hBitBuf->Buffer [(byteOffset-2) & byteMask] << 16 | - hBitBuf->Buffer [(byteOffset-1) & byteMask] << 8 | - hBitBuf->Buffer [ byteOffset & byteMask] ; - UINT txa = 0x0; - - tx >>= (8 - bitOffset) ; - - if (bitOffset && numberOfBits > 24) - { - tx |= hBitBuf->Buffer [(byteOffset-4) & byteMask] << (24 + bitOffset) ; - } - - /* in place turn around */ - for (i = 0; i < 16; i++) { - UINT bitMaskR = 0x00000001 << i; - UINT bitMaskL = 0x80000000 >> i; - - txa |= (tx & bitMaskR) << (31 - (i<<1)); - txa |= (tx & bitMaskL) >> (31 - (i<<1)); - } - - return (txa >> (32 - numberOfBits)) ; -} - -void FDK_put (HANDLE_FDK_BITBUF hBitBuf, UINT value, const UINT numberOfBits) -{ - UINT byteOffset = hBitBuf->BitNdx >> 3 ; - UINT bitOffset = hBitBuf->BitNdx & 0x07 ; - - hBitBuf->BitNdx = (hBitBuf->BitNdx + numberOfBits) & (hBitBuf->bufBits - 1) ; - hBitBuf->BitCnt += numberOfBits ; - hBitBuf->ValidBits += numberOfBits ; - - UINT byteMask = hBitBuf->bufSize - 1 ; - - UINT tmp = value<<(32-numberOfBits)>>bitOffset; - UINT mask = ~BitMask[(32-bitOffset)] | (BitMask [(32-numberOfBits)] >> bitOffset) ; - - hBitBuf->Buffer [ byteOffset & byteMask] = (hBitBuf->Buffer [ byteOffset & byteMask]&(mask>>24)) | (UCHAR)(tmp>>24); - hBitBuf->Buffer [(byteOffset+1) & byteMask] = (hBitBuf->Buffer [(byteOffset+1) & byteMask]&(mask>>16)) | (UCHAR)(tmp>>16); - hBitBuf->Buffer [(byteOffset+2) & byteMask] = (hBitBuf->Buffer [(byteOffset+2) & byteMask]&(mask>>8)) | (UCHAR)(tmp>>8); - hBitBuf->Buffer [(byteOffset+3) & byteMask] = (hBitBuf->Buffer [(byteOffset+3) & byteMask]&(mask)) | (UCHAR)(tmp); - - if (bitOffset && numberOfBits > 24) - { - hBitBuf->Buffer [(byteOffset+4) & byteMask] = (UCHAR)(value<<(40-numberOfBits)>>bitOffset) | - ( hBitBuf->Buffer [(byteOffset+4) & byteMask] & BitMask[(40-numberOfBits-bitOffset)] ) ; - } -} - -void FDK_putBwd (HANDLE_FDK_BITBUF hBitBuf, UINT value, const UINT numberOfBits) -{ - UINT byteOffset = hBitBuf->BitNdx >> 3 ; - UINT bitOffset = 7 - (hBitBuf->BitNdx & 0x07) ; - UINT byteMask = hBitBuf->bufSize - 1 ; - - UINT mask = ~(BitMask[numberOfBits] << bitOffset) ; - UINT tmp = 0x0000; - int i; - - hBitBuf->BitNdx = (hBitBuf->BitNdx - numberOfBits) & (hBitBuf->bufBits - 1) ; - hBitBuf->BitCnt -= numberOfBits ; - hBitBuf->ValidBits -= numberOfBits ; - - /* in place turn around */ - for (i = 0; i < 16; i++) { - UINT bitMaskR = 0x00000001 << i; - UINT bitMaskL = 0x80000000 >> i; - - tmp |= (value & bitMaskR) << (31 - (i<<1)); - tmp |= (value & bitMaskL) >> (31 - (i<<1)); - } - value = tmp; - tmp = value>>(32-numberOfBits)<<bitOffset; - - hBitBuf->Buffer [ byteOffset & byteMask] = (hBitBuf->Buffer [ byteOffset & byteMask]&(mask)) | (UCHAR)(tmp); - hBitBuf->Buffer [(byteOffset-1) & byteMask] = (hBitBuf->Buffer [(byteOffset-1) & byteMask]&(mask>>8)) | (UCHAR)(tmp>>8); - hBitBuf->Buffer [(byteOffset-2) & byteMask] = (hBitBuf->Buffer [(byteOffset-2) & byteMask]&(mask>>16)) | (UCHAR)(tmp>>16); - hBitBuf->Buffer [(byteOffset-3) & byteMask] = (hBitBuf->Buffer [(byteOffset-3) & byteMask]&(mask>>24)) | (UCHAR)(tmp>>24); - - if ((bitOffset + numberOfBits) > 32) - { - hBitBuf->Buffer [(byteOffset-4) & byteMask] = (UCHAR)(value>>(64-numberOfBits-bitOffset)) | - ( hBitBuf->Buffer [(byteOffset-4) & byteMask] & ~(BitMask[bitOffset] >> (32-numberOfBits)) ) ; - } -} - - -void FDK_pushBack (HANDLE_FDK_BITBUF hBitBuf, const UINT numberOfBits, UCHAR config) -{ - hBitBuf->BitCnt -= numberOfBits ; - hBitBuf->ValidBits += (config==0) ? numberOfBits : (-(INT)numberOfBits) ; - hBitBuf->BitNdx = (hBitBuf->BitNdx - numberOfBits) & (hBitBuf->bufBits - 1) ; -} - -void FDK_pushForward (HANDLE_FDK_BITBUF hBitBuf, const UINT numberOfBits, UCHAR config) -{ - hBitBuf->BitCnt += numberOfBits ; - hBitBuf->ValidBits -= (config==0) ? numberOfBits : (-(INT)numberOfBits) ; - hBitBuf->BitNdx = (hBitBuf->BitNdx + numberOfBits) & (hBitBuf->bufBits - 1) ; -} - - -void FDK_byteAlign (HANDLE_FDK_BITBUF hBitBuf, UCHAR config) -{ - INT alignment = hBitBuf->BitCnt & 0x07 ; - - if (alignment) - { - if (config==0) - FDK_pushForward (hBitBuf, 8 - alignment, config) ; /* BS_READER */ - else - FDK_put (hBitBuf,0 , 8 - alignment) ; /* BS_WRITER */ - } - - hBitBuf->BitCnt = 0 ; -} - -UINT FDK_getValidBits (HANDLE_FDK_BITBUF hBitBuf) -{ - return hBitBuf->ValidBits; -} - -INT FDK_getFreeBits (HANDLE_FDK_BITBUF hBitBuf) -{ - return (hBitBuf->bufBits - hBitBuf->ValidBits) ; -} - -void FDK_setBitCnt (HANDLE_FDK_BITBUF hBitBuf, const UINT value) -{ - hBitBuf->BitCnt = value ; -} - -INT FDK_getBitCnt (HANDLE_FDK_BITBUF hBitBuf) -{ - return hBitBuf->BitCnt ; -} - -void FDK_Feed(HANDLE_FDK_BITBUF hBitBuf, - UCHAR *RESTRICT inputBuffer, - const UINT bufferSize, - UINT *bytesValid) -{ - inputBuffer = &inputBuffer [bufferSize - *bytesValid] ; - - UINT bTotal = 0 ; - - UINT bToRead = (hBitBuf->bufBits - hBitBuf->ValidBits) >> 3 ; - UINT noOfBytes = fMin(bToRead, *bytesValid); //(bToRead < *bytesValid) ? bToRead : *bytesValid ; - - while (noOfBytes > 0) - { - /* split read to buffer size */ - bToRead = hBitBuf->bufSize - hBitBuf->ReadOffset ; - bToRead = fMin(bToRead, noOfBytes); //(bToRead < noOfBytes) ? bToRead : noOfBytes ; - - /* copy 'bToRead' bytes from 'ptr' to inputbuffer */ - FDKmemcpy(&hBitBuf->Buffer[hBitBuf->ReadOffset], inputBuffer, bToRead*sizeof(UCHAR)); - - /* add noOfBits to number of valid bits in buffer */ - hBitBuf->ValidBits += bToRead << 3 ; - bTotal += bToRead ; - inputBuffer += bToRead ; - - hBitBuf->ReadOffset = (hBitBuf->ReadOffset + bToRead) & (hBitBuf->bufSize - 1) ; - noOfBytes -= bToRead ; - } - - *bytesValid -= bTotal ; -} - -void CopyAlignedBlock (HANDLE_FDK_BITBUF h_BitBufSrc, UCHAR *RESTRICT dstBuffer, UINT bToRead) -{ - UINT byteOffset = h_BitBufSrc->BitNdx >> 3 ; - const UINT byteMask = h_BitBufSrc->bufSize - 1 ; - - UCHAR *RESTRICT pBBB = h_BitBufSrc->Buffer; - for (UINT i = 0 ; i < bToRead ; i++) - { - dstBuffer[i] = pBBB[(byteOffset+i) & byteMask] ; - } - - bToRead <<= 3 ; - - h_BitBufSrc->BitNdx = (h_BitBufSrc->BitNdx + bToRead) & (h_BitBufSrc->bufBits - 1) ; - h_BitBufSrc->BitCnt += bToRead ; - h_BitBufSrc->ValidBits -= bToRead ; -} - -void FDK_Copy (HANDLE_FDK_BITBUF h_BitBufDst, HANDLE_FDK_BITBUF h_BitBufSrc, UINT *bytesValid) -{ - INT bTotal = 0; - - /* limit noOfBytes to valid bytes in src buffer and available bytes in dst buffer */ - UINT bToRead = h_BitBufSrc->ValidBits >> 3 ; - UINT noOfBytes = fMin(bToRead, *bytesValid); //(*bytesValid < bToRead) ? *bytesValid : bToRead ; - bToRead = FDK_getFreeBits(h_BitBufDst); - noOfBytes = fMin(bToRead, noOfBytes); //(bToRead < noOfBytes) ? bToRead : noOfBytes; - - while (noOfBytes > 0) - { - /* Split Read to buffer size */ - bToRead = h_BitBufDst->bufSize - h_BitBufDst->ReadOffset ; - bToRead = fMin(noOfBytes, bToRead); //(noOfBytes < bToRead) ? noOfBytes : bToRead ; - - /* copy 'bToRead' bytes from buffer to buffer */ - if (!(h_BitBufSrc->BitNdx & 0x07)) { - CopyAlignedBlock (h_BitBufSrc, h_BitBufDst->Buffer + h_BitBufDst->ReadOffset, bToRead) ; - } else { - for (UINT i = 0; i < bToRead; i++) - { - h_BitBufDst->Buffer [h_BitBufDst->ReadOffset + i] = (UCHAR)FDK_get(h_BitBufSrc,8); - } - } - - /* add noOfBits to number of valid bits in buffer */ - h_BitBufDst->ValidBits += bToRead << 3 ; - bTotal += bToRead; - - h_BitBufDst->ReadOffset = (h_BitBufDst->ReadOffset + bToRead) & (h_BitBufDst->bufSize-1); - noOfBytes -= bToRead; - } - - *bytesValid -=bTotal; -} - -void FDK_Fetch (HANDLE_FDK_BITBUF hBitBuf, UCHAR *outBuf, UINT *writeBytes) -{ - UCHAR *RESTRICT outputBuffer = outBuf; - UINT bTotal = 0 ; - - UINT bToWrite = (hBitBuf->ValidBits) >> 3 ; - UINT noOfBytes = fMin(bToWrite, *writeBytes); //(bToWrite < *writeBytes) ? bToWrite : *writeBytes ; - - while (noOfBytes > 0) - { - /* split write to buffer size */ - bToWrite = hBitBuf->bufSize - hBitBuf->WriteOffset ; - bToWrite = fMin(bToWrite, noOfBytes); //(bToWrite < noOfBytes) ? bToWrite : noOfBytes ; - - /* copy 'bToWrite' bytes from bitbuffer to outputbuffer */ - FDKmemcpy(outputBuffer, &hBitBuf->Buffer[hBitBuf->WriteOffset], bToWrite*sizeof(UCHAR)); - - /* sub noOfBits from number of valid bits in buffer */ - hBitBuf->ValidBits -= bToWrite << 3 ; - bTotal += bToWrite ; - outputBuffer += bToWrite ; - - hBitBuf->WriteOffset = (hBitBuf->WriteOffset + bToWrite) & (hBitBuf->bufSize - 1) ; - noOfBytes -= bToWrite ; - } - - *writeBytes = bTotal ; -} - |