/****************************************************************************//* *	mpegaud.h -- MPEG Audio defintions * *	Author  :   St閜hane TAVENARD * *	(C) Copyright 1997-1999 St閜hane TAVENARD *	    All Rights Reserved *	 *	This program is free software; you can redistribute it and/or modify *	it under the terms of the GNU General Public License as published by *	the Free Software Foundation; either version 2 of the License, or *	(at your option) any later version. *	 *	This program is distributed in the hope that it will be useful, *	but WITHOUT ANY WARRANTY; without even the implied warranty of *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the *	GNU General Public License for more details. *	 *	You should have received a copy of the GNU General Public License *	along with this program; if not, write to the Free Software *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *//****************************************************************************/#ifndef MPEGAUD_H#define MPEGAUD_H/****************************************************************************/#include "bitstr.h"#include "huff.h"/* *	Integer only decode. *///#define MPEGAUD_INT/* *	ID */#define MPA_ID_1	1#define MPA_ID_2	0/* *	Sampling Frequencies */#define MPA_SAMP_44100		0#define MPA_SAMP_48000		1#define MPA_SAMP_32000		2/* *	Modes */#define MPA_MAX_CHANNELS	2#define MPA_MODE_STEREO		0#define MPA_MODE_JOINT_STEREO	1#define MPA_MODE_DUAL_CHANNEL	2#define MPA_MODE_MONO		3#define MPA_SSLIMIT		18#define MPA_SBLIMIT		32#define MPA_GRANULE_SIZE	576  // MPA_SSLIMIT*MPA_SBLIMIT#define MPA_SCALE_BLOCK		12#define MPA_HANNING_SIZE	512#define MPA_SCALE_RANGE		64#define MPA_SCALE		32768#define MPA_PCM_SIZE		1152/* *	Layer II */#define MPA_GROUPS		3/* *	Layer III */#define MPA_MAX_GRANULES	2#define MPA_MAX_WINDOWS		3typedef struct {	INT16	ID;	INT16	layer;	INT16	protection_bit;	INT16	bitrate_index;	INT16	sampling_frequency;	BOOL	padding_bit;	BOOL	private_bit;	INT16	mode;	INT16	mode_extension;	BOOL	copyright;	BOOL	original;	INT16	emphasis;	INT16	crc_check;	BOOL	half_freq; // MPEG 2.5 ext.	INT32	header_pos;} MPA_HEADER;/* *	Layer III granule info */typedef struct {	UINT16	part2_3_length;        // 12 uimsbf	UINT16	big_values;            // 9  uimsbf	UINT16	global_gain;           // 8  uimsbf	UINT16	scalefac_compress;     // 4  bslbf MPEG1, 9 bslbf MPEG2	BOOL	window_switching_flag;	UINT16	block_type;            // 2  bslbf	BOOL	mixed_block_flag;	UINT16	table_select[ 3 ];     // 5  bslbf	UINT16	subblock_gain[ 3 ];    // 3  bslbf	UINT16	region0_count;         // 4  bslbf	UINT16	region1_count;         // 3  bslbf	BOOL	preflag;	BOOL	scalefac_scale;        // 1 bslbf	UINT16	count1table_select;    // 1 bslbf} MPA_GRANULE_INFO;/* *	Layer III side info */typedef struct {	UINT16	main_data_begin;       // 9  uimsbf MPEG1, 8 uimsbf MPEG2	UINT16	private_bits;          // 5/3 bslbf MPEG1, 1/2 bslbf MPEG2	struct {		BOOL scfsi[4];		MPA_GRANULE_INFO gr[MPA_MAX_GRANULES];	} ch[MPA_MAX_CHANNELS];} MPA_SIDE_INFO;/* *	Layer III scale factors *	Note : swap  s[MPA_MAX_WINDOWS][13] to s[13][MPA_MAX_WINDOWS] *	       to optimize time access ? */typedef struct {   UINT16	l[23];   UINT16	s[MPA_MAX_WINDOWS][13];} MPA_SCALE_FAC3;#ifdef MPEGAUD_INT#define MPEGAUD_SCALE_TYPE INT32#define MPEGAUD_SCALE_BITS 30#define MPEGAUD_FRACT_TYPE INT16#define MPEGAUD_FRACT_BITS 14#else#define MPEGAUD_SCALE_TYPE REAL#define MPEGAUD_FRACT_TYPE REAL#endif#include "mpegsub.h"#include "mpegimdc.h" // #4/* *	Warning: assume 32-bit alignement */typedef struct {	const UINT8	(*alloc)[16]; // MPEG-II alloc table	INT16		bit_alloc[MPA_MAX_CHANNELS][MPA_SBLIMIT];	MPEGAUD_SCALE_TYPE scale[MPA_MAX_CHANNELS][MPA_GROUPS][MPA_SBLIMIT];	UINT16		sample[MPA_MAX_CHANNELS][MPA_GROUPS][MPA_SBLIMIT];	MPEGAUD_FRACT_TYPE fraction[MPA_MAX_CHANNELS][MPA_GROUPS][MPA_SBLIMIT];	INT16		is[MPA_GRANULE_SIZE];	MPEGAUD_FRACT_TYPE xr[MPA_MAX_CHANNELS][MPA_GRANULE_SIZE];	MPEGAUD_FRACT_TYPE lr[MPA_MAX_CHANNELS][MPA_GRANULE_SIZE];	INT16		*pcm[MPA_MAX_CHANNELS];	INT16		scfsi[MPA_MAX_CHANNELS][MPA_SBLIMIT];	MPA_SCALE_FAC3	scale_fac3[MPA_MAX_CHANNELS];	BITSTREAM	*bitstream;	HUFFMAN		*huffman;	MPEGSUB		*mpegsub;	MPEGIMDCT	*mpegimdct;	MPA_HEADER	header;	MPA_SIDE_INFO	side_info;	BOOL		stereo;	INT16		channels;	UINT16		sfreq;	UINT32		stream_size;	INT16		bitrate;	INT16		jsbound;	INT16		sblimit;	INT16		current_table;	UINT32		frame;	INT16		freq_div;	INT16		quality;	INT16		sb_max;	BOOL		force_mono;	INT16		sfb_nul_l[MPA_MAX_CHANNELS];	INT16		sfb_nul_s[MPA_MAX_WINDOWS][MPA_MAX_CHANNELS];	// For MPEG2-III is_pos illegal is not 7 but is_max[sfb]	INT16		is_max_l[21];	INT16		is_max_s[MPA_MAX_WINDOWS][12];	BOOL		need_sync;	INT16		imdct_max[MPA_MAX_CHANNELS];	INT16		sfb_nul_s_top[MPA_MAX_WINDOWS];	INT32		bitstream_start_pos;	void		*keyp;} MPA_STREAM;/****************************************************************************/#endif /* MPEGAUD_H */