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DuerOS-Light-SDK-v1.1.0/duer-os-light/external/mp3dec/pub/mp3common.h@47:9e361da97763, 2017-07-18 (annotated)

Committer:
TMBOY
Date:
Tue Jul 18 16:54:45 2017 +0800
Revision:
47:9e361da97763
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Who changed what in which revision?

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TMBOY 47:9e361da97763 1 /* ***** BEGIN LICENSE BLOCK *****
TMBOY 47:9e361da97763 2 * Version: RCSL 1.0/RPSL 1.0
TMBOY 47:9e361da97763 3 *
TMBOY 47:9e361da97763 4 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
TMBOY 47:9e361da97763 5 *
TMBOY 47:9e361da97763 6 * The contents of this file, and the files included with this file, are
TMBOY 47:9e361da97763 7 * subject to the current version of the RealNetworks Public Source License
TMBOY 47:9e361da97763 8 * Version 1.0 (the "RPSL") available at
TMBOY 47:9e361da97763 9 * http://www.helixcommunity.org/content/rpsl unless you have licensed
TMBOY 47:9e361da97763 10 * the file under the RealNetworks Community Source License Version 1.0
TMBOY 47:9e361da97763 11 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
TMBOY 47:9e361da97763 12 * in which case the RCSL will apply. You may also obtain the license terms
TMBOY 47:9e361da97763 13 * directly from RealNetworks. You may not use this file except in
TMBOY 47:9e361da97763 14 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
TMBOY 47:9e361da97763 15 * applicable to this file, the RCSL. Please see the applicable RPSL or
TMBOY 47:9e361da97763 16 * RCSL for the rights, obligations and limitations governing use of the
TMBOY 47:9e361da97763 17 * contents of the file.
TMBOY 47:9e361da97763 18 *
TMBOY 47:9e361da97763 19 * This file is part of the Helix DNA Technology. RealNetworks is the
TMBOY 47:9e361da97763 20 * developer of the Original Code and owns the copyrights in the portions
TMBOY 47:9e361da97763 21 * it created.
TMBOY 47:9e361da97763 22 *
TMBOY 47:9e361da97763 23 * This file, and the files included with this file, is distributed and made
TMBOY 47:9e361da97763 24 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
TMBOY 47:9e361da97763 25 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
TMBOY 47:9e361da97763 26 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
TMBOY 47:9e361da97763 27 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
TMBOY 47:9e361da97763 28 *
TMBOY 47:9e361da97763 29 * Technology Compatibility Kit Test Suite(s) Location:
TMBOY 47:9e361da97763 30 * http://www.helixcommunity.org/content/tck
TMBOY 47:9e361da97763 31 *
TMBOY 47:9e361da97763 32 * Contributor(s):
TMBOY 47:9e361da97763 33 *
TMBOY 47:9e361da97763 34 * ***** END LICENSE BLOCK ***** */
TMBOY 47:9e361da97763 35
TMBOY 47:9e361da97763 36 /**************************************************************************************
TMBOY 47:9e361da97763 37 * Fixed-point MP3 decoder
TMBOY 47:9e361da97763 38 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
TMBOY 47:9e361da97763 39 * June 2003
TMBOY 47:9e361da97763 40 *
TMBOY 47:9e361da97763 41 * mp3common.h - implementation-independent API's, datatypes, and definitions
TMBOY 47:9e361da97763 42 **************************************************************************************/
TMBOY 47:9e361da97763 43
TMBOY 47:9e361da97763 44 #ifndef _MP3COMMON_H
TMBOY 47:9e361da97763 45 #define _MP3COMMON_H
TMBOY 47:9e361da97763 46
TMBOY 47:9e361da97763 47 #include "mp3dec.h"
TMBOY 47:9e361da97763 48 #include "statname.h" /* do name-mangling for static linking */
TMBOY 47:9e361da97763 49
TMBOY 47:9e361da97763 50 #define MAX_SCFBD 4 /* max scalefactor bands per channel */
TMBOY 47:9e361da97763 51 #define NGRANS_MPEG1 2
TMBOY 47:9e361da97763 52 #define NGRANS_MPEG2 1
TMBOY 47:9e361da97763 53
TMBOY 47:9e361da97763 54 /* 11-bit syncword if MPEG 2.5 extensions are enabled */
TMBOY 47:9e361da97763 55 #define SYNCWORDH 0xff
TMBOY 47:9e361da97763 56 #define SYNCWORDL 0xe0
TMBOY 47:9e361da97763 57
TMBOY 47:9e361da97763 58 /* 12-bit syncword if MPEG 1,2 only are supported
TMBOY 47:9e361da97763 59 * #define SYNCWORDH 0xff
TMBOY 47:9e361da97763 60 * #define SYNCWORDL 0xf0
TMBOY 47:9e361da97763 61 */
TMBOY 47:9e361da97763 62
TMBOY 47:9e361da97763 63 typedef struct _MP3DecInfo {
TMBOY 47:9e361da97763 64 /* pointers to platform-specific data structures */
TMBOY 47:9e361da97763 65 void *FrameHeaderPS;
TMBOY 47:9e361da97763 66 void *SideInfoPS;
TMBOY 47:9e361da97763 67 void *ScaleFactorInfoPS;
TMBOY 47:9e361da97763 68 void *HuffmanInfoPS;
TMBOY 47:9e361da97763 69 void *DequantInfoPS;
TMBOY 47:9e361da97763 70 void *IMDCTInfoPS;
TMBOY 47:9e361da97763 71 void *SubbandInfoPS;
TMBOY 47:9e361da97763 72
TMBOY 47:9e361da97763 73 /* buffer which must be large enough to hold largest possible main_data section */
TMBOY 47:9e361da97763 74 unsigned char mainBuf[MAINBUF_SIZE];
TMBOY 47:9e361da97763 75
TMBOY 47:9e361da97763 76 /* special info for "free" bitrate files */
TMBOY 47:9e361da97763 77 int freeBitrateFlag;
TMBOY 47:9e361da97763 78 int freeBitrateSlots;
TMBOY 47:9e361da97763 79
TMBOY 47:9e361da97763 80 /* user-accessible info */
TMBOY 47:9e361da97763 81 int bitrate;
TMBOY 47:9e361da97763 82 int nChans;
TMBOY 47:9e361da97763 83 int samprate;
TMBOY 47:9e361da97763 84 int nGrans; /* granules per frame */
TMBOY 47:9e361da97763 85 int nGranSamps; /* samples per granule */
TMBOY 47:9e361da97763 86 int nSlots;
TMBOY 47:9e361da97763 87 int layer;
TMBOY 47:9e361da97763 88 MPEGVersion version;
TMBOY 47:9e361da97763 89
TMBOY 47:9e361da97763 90 int mainDataBegin;
TMBOY 47:9e361da97763 91 int mainDataBytes;
TMBOY 47:9e361da97763 92
TMBOY 47:9e361da97763 93 int part23Length[MAX_NGRAN][MAX_NCHAN];
TMBOY 47:9e361da97763 94
TMBOY 47:9e361da97763 95 } MP3DecInfo;
TMBOY 47:9e361da97763 96
TMBOY 47:9e361da97763 97 typedef struct _SFBandTable {
TMBOY 47:9e361da97763 98 short l[23];
TMBOY 47:9e361da97763 99 short s[14];
TMBOY 47:9e361da97763 100 } SFBandTable;
TMBOY 47:9e361da97763 101
TMBOY 47:9e361da97763 102 /* decoder functions which must be implemented for each platform */
TMBOY 47:9e361da97763 103 MP3DecInfo *AllocateBuffers(void);
TMBOY 47:9e361da97763 104 void FreeBuffers(MP3DecInfo *mp3DecInfo);
TMBOY 47:9e361da97763 105 int CheckPadBit(MP3DecInfo *mp3DecInfo);
TMBOY 47:9e361da97763 106 int UnpackFrameHeader(MP3DecInfo *mp3DecInfo, unsigned char *buf);
TMBOY 47:9e361da97763 107 int UnpackSideInfo(MP3DecInfo *mp3DecInfo, unsigned char *buf);
TMBOY 47:9e361da97763 108 int DecodeHuffman(MP3DecInfo *mp3DecInfo, unsigned char *buf, int *bitOffset, int huffBlockBits, int gr, int ch);
TMBOY 47:9e361da97763 109 int Dequantize(MP3DecInfo *mp3DecInfo, int gr);
TMBOY 47:9e361da97763 110 int IMDCT(MP3DecInfo *mp3DecInfo, int gr, int ch);
TMBOY 47:9e361da97763 111 int UnpackScaleFactors(MP3DecInfo *mp3DecInfo, unsigned char *buf, int *bitOffset, int bitsAvail, int gr, int ch);
TMBOY 47:9e361da97763 112 int Subband(MP3DecInfo *mp3DecInfo, short *pcmBuf);
TMBOY 47:9e361da97763 113
TMBOY 47:9e361da97763 114 /* mp3tabs.c - global ROM tables */
TMBOY 47:9e361da97763 115 extern const int samplerateTab[3][3];
TMBOY 47:9e361da97763 116 extern const short bitrateTab[3][3][15];
TMBOY 47:9e361da97763 117 extern const short samplesPerFrameTab[3][3];
TMBOY 47:9e361da97763 118 extern const short bitsPerSlotTab[3];
TMBOY 47:9e361da97763 119 extern const short sideBytesTab[3][2];
TMBOY 47:9e361da97763 120 extern const short slotTab[3][3][15];
TMBOY 47:9e361da97763 121 extern const SFBandTable sfBandTable[3][3];
TMBOY 47:9e361da97763 122
TMBOY 47:9e361da97763 123 #endif /* _MP3COMMON_H */