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mp3dec.h
00001 /* ***** BEGIN LICENSE BLOCK ***** 00002 * Version: RCSL 1.0/RPSL 1.0 00003 * 00004 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 00005 * 00006 * The contents of this file, and the files included with this file, are 00007 * subject to the current version of the RealNetworks Public Source License 00008 * Version 1.0 (the "RPSL") available at 00009 * http://www.helixcommunity.org/content/rpsl unless you have licensed 00010 * the file under the RealNetworks Community Source License Version 1.0 00011 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 00012 * in which case the RCSL will apply. You may also obtain the license terms 00013 * directly from RealNetworks. You may not use this file except in 00014 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 00015 * applicable to this file, the RCSL. Please see the applicable RPSL or 00016 * RCSL for the rights, obligations and limitations governing use of the 00017 * contents of the file. 00018 * 00019 * This file is part of the Helix DNA Technology. RealNetworks is the 00020 * developer of the Original Code and owns the copyrights in the portions 00021 * it created. 00022 * 00023 * This file, and the files included with this file, is distributed and made 00024 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 00025 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 00026 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS 00027 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 00028 * 00029 * Technology Compatibility Kit Test Suite(s) Location: 00030 * http://www.helixcommunity.org/content/tck 00031 * 00032 * Contributor(s): 00033 * 00034 * ***** END LICENSE BLOCK ***** */ 00035 00036 /************************************************************************************** 00037 * Fixed-point MP3 decoder 00038 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com) 00039 * June 2003 00040 * 00041 * mp3dec.h - public C API for MP3 decoder 00042 **************************************************************************************/ 00043 00044 #ifndef _MP3DEC_H 00045 #define _MP3DEC_H 00046 00047 #define RDA5991H 00048 00049 #if defined(_WIN32) && !defined(_WIN32_WCE) 00050 # 00051 #elif defined(_WIN32) && defined(_WIN32_WCE) && defined(ARM) 00052 # 00053 #elif defined(_WIN32) && defined(WINCE_EMULATOR) 00054 # 00055 #elif defined(ARM_ADS) 00056 # 00057 #elif defined(_SYMBIAN) && defined(__WINS__) /* Symbian emulator for Ix86 */ 00058 # 00059 #elif defined(__GNUC__) && defined(ARM) 00060 # 00061 #elif defined(__GNUC__) && defined(__i386__) 00062 # 00063 #elif defined(_OPENWAVE_SIMULATOR) || defined(_OPENWAVE_ARMULATOR) 00064 # 00065 #elif defined(RDA5991H) 00066 #else 00067 #error No platform defined. See valid options in mp3dec.h 00068 #endif 00069 00070 #ifdef __cplusplus 00071 extern "C" { 00072 #endif 00073 00074 /* determining MAINBUF_SIZE: 00075 * max mainDataBegin = (2^9 - 1) bytes (since 9-bit offset) = 511 00076 * max nSlots (concatenated with mainDataBegin bytes from before) = 1440 - 9 - 4 + 1 = 1428 00077 * 511 + 1428 = 1939, round up to 1940 (4-byte align) 00078 */ 00079 #define MAINBUF_SIZE 1940 00080 00081 #define MAX_NGRAN 2 /* max granules */ 00082 #define MAX_NCHAN 2 /* max channels */ 00083 #define MAX_NSAMP 576 /* max samples per channel, per granule */ 00084 00085 /* map to 0,1,2 to make table indexing easier */ 00086 typedef enum { 00087 MPEG1 = 0, 00088 MPEG2 = 1, 00089 MPEG25 = 2 00090 } MPEGVersion; 00091 00092 typedef void *HMP3Decoder; 00093 00094 enum { 00095 ERR_MP3_NONE = 0, 00096 ERR_MP3_INDATA_UNDERFLOW = -1, 00097 ERR_MP3_MAINDATA_UNDERFLOW = -2, 00098 ERR_MP3_FREE_BITRATE_SYNC = -3, 00099 ERR_MP3_OUT_OF_MEMORY = -4, 00100 ERR_MP3_NULL_POINTER = -5, 00101 ERR_MP3_INVALID_FRAMEHEADER = -6, 00102 ERR_MP3_INVALID_SIDEINFO = -7, 00103 ERR_MP3_INVALID_SCALEFACT = -8, 00104 ERR_MP3_INVALID_HUFFCODES = -9, 00105 ERR_MP3_INVALID_DEQUANTIZE = -10, 00106 ERR_MP3_INVALID_IMDCT = -11, 00107 ERR_MP3_INVALID_SUBBAND = -12, 00108 00109 ERR_UNKNOWN = -9999 00110 }; 00111 00112 typedef struct _MP3FrameInfo { 00113 int bitrate; 00114 int nChans; 00115 int samprate; 00116 int bitsPerSample; 00117 int outputSamps; 00118 int layer; 00119 int version; 00120 } MP3FrameInfo; 00121 00122 /* public API */ 00123 HMP3Decoder MP3InitDecoder(void); 00124 void MP3FreeDecoder(HMP3Decoder hMP3Decoder); 00125 int MP3Decode(HMP3Decoder hMP3Decoder, unsigned char **inbuf, int *bytesLeft, short *outbuf, int useSize); 00126 00127 void MP3GetLastFrameInfo(HMP3Decoder hMP3Decoder, MP3FrameInfo *mp3FrameInfo); 00128 int MP3GetNextFrameInfo(HMP3Decoder hMP3Decoder, MP3FrameInfo *mp3FrameInfo, unsigned char *buf); 00129 int MP3FindSyncWord(unsigned char *buf, int nBytes); 00130 00131 #ifdef __cplusplus 00132 } 00133 #endif 00134 00135 #endif /* _MP3DEC_H */
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