forked from Mirrors/wine-wine
167 lines
3.9 KiB
C
167 lines
3.9 KiB
C
/*
|
|
* Copyright (c) Michael Hipp and other authors of the mpglib project.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
|
|
#ifndef WIN32
|
|
#include <sys/signal.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include <math.h>
|
|
|
|
#ifdef _WIN32
|
|
# undef WIN32
|
|
# define WIN32
|
|
|
|
# define M_PI 3.14159265358979323846
|
|
# define M_SQRT2 1.41421356237309504880
|
|
# define REAL_IS_FLOAT
|
|
|
|
#endif
|
|
|
|
#ifdef REAL_IS_FLOAT
|
|
# define real float
|
|
#elif defined(REAL_IS_LONG_DOUBLE)
|
|
# define real long double
|
|
#else
|
|
# define real double
|
|
#endif
|
|
|
|
#ifdef __GNUC__
|
|
#define INLINE inline
|
|
#else
|
|
#define INLINE
|
|
#endif
|
|
|
|
#ifndef FALSE
|
|
#define FALSE 0
|
|
#endif
|
|
#ifndef TRUE
|
|
#define TRUE 1
|
|
#endif
|
|
|
|
#define SBLIMIT 32
|
|
#define SSLIMIT 18
|
|
|
|
#define SCALE_BLOCK 12
|
|
|
|
|
|
#define MPG_MD_STEREO 0
|
|
#define MPG_MD_JOINT_STEREO 1
|
|
#define MPG_MD_DUAL_CHANNEL 2
|
|
#define MPG_MD_MONO 3
|
|
|
|
#define MAXFRAMESIZE 1792
|
|
|
|
|
|
struct frame {
|
|
int stereo;
|
|
int jsbound;
|
|
int single;
|
|
int lsf;
|
|
int mpeg25;
|
|
int header_change;
|
|
int lay;
|
|
int error_protection;
|
|
int bitrate_index;
|
|
int sampling_frequency;
|
|
int padding;
|
|
int extension;
|
|
int mode;
|
|
int mode_ext;
|
|
int copyright;
|
|
int original;
|
|
int emphasis;
|
|
int framesize; /* computed framesize */
|
|
|
|
/* layer2 stuff */
|
|
int II_sblimit;
|
|
const struct al_table *alloc;
|
|
|
|
struct mpstr *mp;
|
|
};
|
|
|
|
struct parameter {
|
|
int quiet; /* shut up! */
|
|
int tryresync; /* resync stream after error */
|
|
int verbose; /* verbose level */
|
|
int checkrange;
|
|
};
|
|
|
|
extern unsigned int get1bit(void);
|
|
extern unsigned int getbits(int);
|
|
extern unsigned int getbits_fast(int);
|
|
extern int set_pointer(struct mpstr *,long);
|
|
|
|
extern unsigned char *wordpointer;
|
|
extern int bitindex;
|
|
|
|
extern void make_decode_tables(long scaleval);
|
|
extern int do_layer3(struct frame *fr,unsigned char *,int *);
|
|
extern int do_layer2(struct frame *fr,unsigned char *,int *);
|
|
extern int do_layer1(struct frame *fr,unsigned char *,int *);
|
|
extern int decode_header(struct frame *fr,unsigned long newhead);
|
|
|
|
|
|
|
|
struct gr_info_s {
|
|
int scfsi;
|
|
unsigned part2_3_length;
|
|
unsigned big_values;
|
|
unsigned scalefac_compress;
|
|
unsigned block_type;
|
|
unsigned mixed_block_flag;
|
|
unsigned table_select[3];
|
|
unsigned subblock_gain[3];
|
|
unsigned maxband[3];
|
|
unsigned maxbandl;
|
|
unsigned maxb;
|
|
unsigned region1start;
|
|
unsigned region2start;
|
|
unsigned preflag;
|
|
unsigned scalefac_scale;
|
|
unsigned count1table_select;
|
|
real *full_gain[3];
|
|
real *pow2gain;
|
|
};
|
|
|
|
struct III_sideinfo
|
|
{
|
|
unsigned main_data_begin;
|
|
unsigned private_bits;
|
|
struct {
|
|
struct gr_info_s gr[2];
|
|
} ch[2];
|
|
};
|
|
|
|
extern int synth_1to1 (struct mpstr *,real *,int,unsigned char *,int *);
|
|
extern int synth_1to1_mono (struct mpstr *,real *,unsigned char *,int *);
|
|
|
|
extern void init_layer3(int);
|
|
extern void init_layer2(void);
|
|
extern void make_decode_tables(long scale);
|
|
extern void dct64(real *,real *,real *);
|
|
|
|
extern unsigned char *conv16to8;
|
|
extern real muls[27][64];
|
|
extern real decwin[512+32];
|
|
extern real *pnts[5];
|