134 lines
4.4 KiB
C
134 lines
4.4 KiB
C
|
/* ***** 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,
|
||
|
|
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
|
||
|
|
* FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
|
||
|
|
*
|
||
|
|
* Technology Compatibility Kit Test Suite(s) Location:
|
||
|
|
* http://www.helixcommunity.org/content/tck
|
||
|
|
*
|
||
|
|
* 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(_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
|
||
|
|
// J.Sz. 21/04/2006
|
||
|
|
#error No platform defined. See valid options in mp3dec.h
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#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;
|
||
|
|
|
||
|
|
/* public API */
|
||
|
|
HMP3Decoder MP3InitDecoder(void);
|
||
|
|
void MP3FreeDecoder(HMP3Decoder hMP3Decoder);
|
||
|
|
int MP3Decode(HMP3Decoder hMP3Decoder, unsigned char **inbuf, int *bytesLeft, short *outbuf, int useSize);
|
||
|
|
|
||
|
|
void MP3GetLastFrameInfo(HMP3Decoder hMP3Decoder, MP3FrameInfo *mp3FrameInfo);
|
||
|
|
int MP3GetNextFrameInfo(HMP3Decoder hMP3Decoder, MP3FrameInfo *mp3FrameInfo, unsigned char *buf);
|
||
|
|
int MP3FindSyncWord(unsigned char *buf, int nBytes);
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _MP3DEC_H */
|