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,
- * 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
- #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_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 */