mp3dec.h

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/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
 *      
 * The contents of this file, and the files included with this file, are 
 * subject to the current version of the RealNetworks Public Source License 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * 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 
 * directly from RealNetworks.  You may not use this file except in 
 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 
 * applicable to this file, the RCSL.  Please see the applicable RPSL or 
 * RCSL for the rights, obligations and limitations governing use of the 
 * contents of the file.  
 *  
 * This file is part of the Helix DNA Technology. RealNetworks is the 
 * developer of the Original Code and owns the copyrights in the portions 
 * it created. 
 *  
 * This file, and the files included with this file, is distributed and made 
 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
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 * 
 * Technology Compatibility Kit Test Suite(s) Location: 
 *    http://www.helixcommunity.org/content/tck 
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 * Contributor(s): 
 *  
 * ***** 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


#if defined(__GNUC__) && (defined(ARM) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__))
#include "ci112x_system.h"
#include "core_cm4.h"
#elif defined(__ICCARM__)
#include "ci112x_system.h"
#include "core_cm4.h"
#else
#endif

#ifdef __cplusplus
extern "C" {
#endif

#include <stdlib.h>
    
//#define USE_OUTSIDE_MP3_TABLE

/* 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;
typedef void *MP3SaveLastInfo;

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_MP3_UNKNOWN =              -9999
};

typedef struct _MP3FrameInfo {
    int bitrate;
    int nChans;
    int samprate;
    int bitsPerSample;
    int outputSamps;
    int layer;
    int version;
} MP3FrameInfo;

/* public API */
HMP3Decoder MP3InitDecoder(void);
void MP3FreeDecoder(HMP3Decoder hMP3Decoder);
int MP3Decode(HMP3Decoder hMP3Decoder, unsigned char **inbuf, int *bytesLeft, short *outbuf, int useSize);

size_t MP3GetSaveLastInfoStructSize(void);
int MP3ClearLastDecodeMainData(HMP3Decoder hMP3Decoder);
int MP3SaveLastDecodeMainData(HMP3Decoder hMP3Decoder,MP3SaveLastInfo saveInfo);
int MP3LoadLastDecodeMainData(HMP3Decoder hMP3Decoder,MP3SaveLastInfo saveInfo);

void MP3GetLastFrameInfo(HMP3Decoder hMP3Decoder, MP3FrameInfo *mp3FrameInfo);
int MP3GetNextFrameInfo(HMP3Decoder hMP3Decoder, MP3FrameInfo *mp3FrameInfo, unsigned char *buf);
int MP3FindSyncWord(unsigned char *buf, int nBytes);
void MP3Lib_Set_Func(void* f1, void* f2,void* f3,void* f4,void* f5);
#ifdef USE_OUTSIDE_MP3_TABLE
void config_mp3hufftabs_point(void *p0,void *p1,void *p2);
void config_mp3trigtabs_point(void *p);
void config_mp3tab_point(void *p);
#endif 

#ifdef __cplusplus
}
#endif

#endif  /* _MP3DEC_H */