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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
#ifdef ARDUINO
#include <Arduino.h>
#endif
#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(__ARMEL__)
#
#elif defined(__GNUC__) && defined(__i386__)
#
#elif defined(__GNUC__) && defined(__amd64__)
#
#elif defined(_OPENWAVE_SIMULATOR) || defined(_OPENWAVE_ARMULATOR)
#
#elif defined(__GNUC__) && defined(__AVR32_UC__)
#
#elif defined(__CORTEX_M) && __CORTEX_M == 0x04U
#
#elif defined(__MK66FX1M0__) || defined(__MK64FX512__) || defined(__MK20DX256__) /* teensy 3.6, 3.5, or 3.1/2 */
#
#elif defined(MP3DEC_GENERIC)
#
#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_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 */
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