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| 1 | /* ***** BEGIN LICENSE BLOCK ***** |
| 2 | * Source last modified: $Id: bitstream.h,v 1.1.2.1 2005/02/26 02:05:12 jrecker Exp $ |
| 3 | * |
| 4 | * Portions Copyright (c) 1995-2005 RealNetworks, Inc. All Rights Reserved. |
| 5 | * |
| 6 | * The contents of this file, and the files included with this file, |
| 7 | * are subject to the current version of the RealNetworks Public |
| 8 | * Source License (the "RPSL") available at |
| 9 | * http://www.helixcommunity.org/content/rpsl unless you have licensed |
| 10 | * the file under the current version of the RealNetworks Community |
| 11 | * Source License (the "RCSL") available at |
| 12 | * http://www.helixcommunity.org/content/rcsl, in which case the RCSL |
| 13 | * will apply. You may also obtain the license terms directly from |
| 14 | * RealNetworks. You may not use this file except in compliance with |
| 15 | * the RPSL or, if you have a valid RCSL with RealNetworks applicable |
| 16 | * to this file, the RCSL. Please see the applicable RPSL or RCSL for |
| 17 | * the rights, obligations and limitations governing use of the |
| 18 | * contents of the file. |
| 19 | * |
| 20 | * This file is part of the Helix DNA Technology. RealNetworks is the |
| 21 | * developer of the Original Code and owns the copyrights in the |
| 22 | * portions it created. |
| 23 | * |
| 24 | * This file, and the files included with this file, is distributed |
| 25 | * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY |
| 26 | * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS |
| 27 | * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES |
| 28 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET |
| 29 | * ENJOYMENT OR NON-INFRINGEMENT. |
| 30 | * |
| 31 | * Technology Compatibility Kit Test Suite(s) Location: |
| 32 | * http://www.helixcommunity.org/content/tck |
| 33 | * |
| 34 | * Contributor(s): |
| 35 | * |
| 36 | * ***** END LICENSE BLOCK ***** */ |
| 37 | |
| 38 | /************************************************************************************** |
| 39 | * Fixed-point HE-AAC decoder |
| 40 | * Jon Recker (jrecker@real.com) |
| 41 | * February 2005 |
| 42 | * |
| 43 | * bitstream.h - definitions of bitstream handling functions |
| 44 | **************************************************************************************/ |
| 45 | |
| 46 | #ifndef _BITSTREAM_H |
| 47 | #define _BITSTREAM_H |
| 48 | |
| 49 | #include "aaccommon.h" |
| 50 | |
| 51 | /* additional external symbols to name-mangle for static linking */ |
| 52 | #define SetBitstreamPointer STATNAME(SetBitstreamPointer) |
| 53 | #define GetBits STATNAME(GetBits) |
| 54 | #define GetBitsNoAdvance STATNAME(GetBitsNoAdvance) |
| 55 | #define AdvanceBitstream STATNAME(AdvanceBitstream) |
| 56 | #define CalcBitsUsed STATNAME(CalcBitsUsed) |
| 57 | #define ByteAlignBitstream STATNAME(ByteAlignBitstream) |
| 58 | |
| 59 | typedef struct _BitStreamInfo { |
| 60 | unsigned char *bytePtr; |
| 61 | unsigned int iCache; |
| 62 | int cachedBits; |
| 63 | int nBytes; |
| 64 | } BitStreamInfo; |
| 65 | |
| 66 | /* bitstream.c */ |
| 67 | void SetBitstreamPointer(BitStreamInfo *bsi, int nBytes, unsigned char *buf); |
| 68 | unsigned int GetBits(BitStreamInfo *bsi, int nBits); |
| 69 | unsigned int GetBitsNoAdvance(BitStreamInfo *bsi, int nBits); |
| 70 | void AdvanceBitstream(BitStreamInfo *bsi, int nBits); |
| 71 | int CalcBitsUsed(BitStreamInfo *bsi, unsigned char *startBuf, int startOffset); |
| 72 | void ByteAlignBitstream(BitStreamInfo *bsi); |
| 73 | |
| 74 | #endif /* _BITSTREAM_H */ |
| 75 |