mp3dec.h

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/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
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 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
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 * the file under the RealNetworks Community Source License Version 1.0 
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
 * in which case the RCSL will apply. You may also obtain the license terms 
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 * ***** END LICENSE BLOCK ***** */ 
 
/**************************************************************************************
 * Fixed-point MP3 decoder
 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
 * June 2003
 *
 * mp3dec.h - public C API for MP3 decoder
 **************************************************************************************/
 
#ifndef _MP3DEC_H
#define _MP3DEC_H
 
#include "fl/stl/cstddef.h"
#include "fl/stl/noexcept.h"
 
#if defined(_WIN32) && !defined(_WIN32_WCE)
#
#elif defined(_WIN32) && defined(_WIN32_WCE) && defined(ARM)
#
#elif defined(_WIN32) && defined(WINCE_EMULATOR)
#
#elif defined(ARM_ADS)
#
#elif defined(_SYMBIAN) && defined(__WINS__)    /* Symbian emulator for Ix86 */
#
#elif defined(__GNUC__) && defined(ARM)
#
#elif defined(__GNUC__) && defined(__i386__)
#
#elif defined(_OPENWAVE_SIMULATOR) || defined(_OPENWAVE_ARMULATOR)
#
#else
//#error No platform defined. See valid options in mp3dec.h
#endif
 
/* determining MAINBUF_SIZE:
 *   max mainDataBegin = (2^9 - 1) bytes (since 9-bit offset) = 511
 *   max nSlots (concatenated with mainDataBegin bytes from before) = 1440 - 9 - 4 + 1 = 1428
 *   511 + 1428 = 1939, round up to 1940 (4-byte align)
 */
#define MAINBUF_SIZE    1940
 
#define MAX_NGRAN       2       /* max granules */
#define MAX_NCHAN       2       /* max channels */
#define MAX_NSAMP       576     /* max samples per channel, per granule */
 
/* map to 0,1,2 to make table indexing easier */
typedef enum {
    MPEG1 =  0,
    MPEG2 =  1,
    MPEG25 = 2
} MPEGVersion;
 
typedef void *HMP3Decoder;
 
enum {
    ERR_MP3_NONE =                  0,
    ERR_MP3_INDATA_UNDERFLOW =     -1,
    ERR_MP3_MAINDATA_UNDERFLOW =   -2,
    ERR_MP3_FREE_BITRATE_SYNC =    -3,
    ERR_MP3_OUT_OF_MEMORY =           -4,
    ERR_MP3_NULL_POINTER =         -5,
    ERR_MP3_INVALID_FRAMEHEADER =  -6,
    ERR_MP3_INVALID_SIDEINFO =     -7,
    ERR_MP3_INVALID_SCALEFACT =    -8,
    ERR_MP3_INVALID_HUFFCODES =    -9,
    ERR_MP3_INVALID_DEQUANTIZE =   -10,
    ERR_MP3_INVALID_IMDCT =        -11,
    ERR_MP3_INVALID_SUBBAND =      -12,
 
    ERR_UNKNOWN =                  -9999
};
 
typedef struct _MP3FrameInfo {
    int bitrate;
    int nChans;
    int samprate;
    int bitsPerSample;
    int outputSamps;
    int layer;
    int version;
} MP3FrameInfo;
 
#ifdef __cplusplus
namespace fl {
namespace third_party {
#endif
 
/* Internal API - all symbols in fl::third_party namespace */
HMP3Decoder MP3InitDecoder(void) FL_NOEXCEPT;
void MP3FreeDecoder(HMP3Decoder hMP3Decoder) FL_NOEXCEPT;
int MP3Decode(HMP3Decoder hMP3Decoder, const unsigned char **inbuf, size_t *bytesLeft, short *outbuf, int useSize) FL_NOEXCEPT;
 
void MP3GetLastFrameInfo(HMP3Decoder hMP3Decoder, MP3FrameInfo *mp3FrameInfo) FL_NOEXCEPT;
int MP3GetNextFrameInfo(HMP3Decoder hMP3Decoder, MP3FrameInfo *mp3FrameInfo, unsigned char *buf) FL_NOEXCEPT;
int MP3FindSyncWord(const unsigned char *buf, int nBytes) FL_NOEXCEPT;
 
#ifdef __cplusplus
}  // namespace third_party
}  // namespace fl
#endif
 
#endif  /* _MP3DEC_H */