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/*

	mpg123: main code of the program (not of the decoder...)

	copyright 1995-2006 by the mpg123 project - free software under the terms of the LGPL 2.1

	see COPYING and AUTHORS files in distribution or http://mpg123.de

	initially written by Michael Hipp

	mpg123 defines

	used source: musicout.h from mpegaudio package

*/

#ifdef __cplusplus

extern "C" {

#endif

#include        

#include        

#ifndef _AUDIO_H_

#define _AUDIO_H_

typedef unsigned char byte;

#define off_t long

//#define I486_OPT 1

#define SKIP_JUNK 1

# define M_PI       3.14159265358979323846

# define M_SQRT2	1.41421356237309504880

# define REAL_IS_FLOAT

# define NEW_DCT9

#ifdef REAL_IS_FLOAT

#  define real float

#  define REAL_SCANF "%f"

#  define REAL_PRINTF "%f"

#else

#  define real double

#  define REAL_SCANF "%lf"

#  define REAL_PRINTF "%f"

#endif

#ifndef DOUBLE_TO_REAL

# define DOUBLE_TO_REAL(x)     (x)

#endif

#ifndef REAL_TO_SHORT

# define REAL_TO_SHORT(x)      (x)

#endif

#ifndef REAL_PLUS_32767

# define REAL_PLUS_32767       32767.0

#endif

#ifndef REAL_MINUS_32768

# define REAL_MINUS_32768      -32768.0

#endif

#ifndef REAL_MUL

# define REAL_MUL(x, y)                ((x) * (y))

#endif

#define INLINE

/* AUDIOBUFSIZE = n*64 with n=1,2,3 ...  */

#define		AUDIOBUFSIZE		16384

#define         FALSE                   0

#define         TRUE                    1

#define         MAX_NAME_SIZE           81

#define         SBLIMIT                 32

#define         SCALE_BLOCK             12

#define         SSLIMIT                 18

#define         MPG_MD_STEREO           0

#define         MPG_MD_JOINT_STEREO     1

#define         MPG_MD_DUAL_CHANNEL     2

#define         MPG_MD_MONO             3

/* I suspect that 32767 would be a better idea here, but Michael put this in... */

#define MAXOUTBURST 32768

/* Pre Shift fo 16 to 8 bit converter table */

#define AUSHIFT (3)

struct bitstream_info

{  int bitindex;

    unsigned char *wordpointer;

};

extern struct bitstream_info bsi;

struct reader

{  char *hFile;

    unsigned char *buffer;

    unsigned char *stream;

    int strpos;

    int strremain;

    int filelen;

    int filepos;

    int  (*head_read)(struct reader *,unsigned long *newhead);

    int  (*read_frame_body)(struct reader *,unsigned char *,int size);

 };

struct al_table

{ short bits;

    short d;

};

struct frame {

    struct al_table *alloc;

    int (*synth)(real *,int,unsigned char *,int *);

    int (*synth_mono)(real *,unsigned char *,int *);

    int stereo; /* I _think_ 1 for mono and 2 for stereo */

    int jsbound;

    int single;

    int II_sblimit;

    int down_sample_sblimit;

    int lsf; /* 0: MPEG 1.0; 1: MPEG 2.0/2.5 -- both used as bool and array index! */

    int mpeg25;

    int down_sample;

    int header_change;

    int lay;

    int (*do_layer)(struct frame *fr,byte *pcm_out, int *pcm_size);

    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 */

    int vbr; /* 1 if variable bitrate was detected */

		unsigned long num; /* the nth frame in some stream... */

};

#if 0

struct parameter {

  int aggressive; /* renice to max. priority */

  int shuffle;	/* shuffle/random play */

  int remote;	/* remote operation */

  int remote_err;	/* remote operation to stderr */

  int outmode;	/* where to out the decoded sampels */

  int quiet;	/* shut up! */

  int xterm_title;	/* Change xterm title to song names? */

  long usebuffer;	/* second level buffer size */

  int tryresync;  /* resync stream after error */

  int verbose;    /* verbose level */

  int force_mono;

  int force_stereo;

  int force_8bit;

  long force_rate;

  int down_sample;

  int checkrange;

  long doublespeed;

  long halfspeed;

  int force_reopen;

  long realtime;

  char filename[256];

  long listentry; /* possibility to choose playback of one entry in playlist (0: off, > 0 : select, < 0; just show list*/

  int rva; /* (which) rva to do: <0: nothing, 0: radio/mix/track 1: album/audiophile */

  char* listname; /* name of playlist */

  int long_id3;

};

#endif

#if 0

struct reader {

  int  (*init)(struct reader *);

  void (*close)(struct reader *);

  int  (*head_read)(struct reader *,unsigned long *newhead);

  int  (*head_shift)(struct reader *,unsigned long *head);

  long  (*skip_bytes)(struct reader *,off_t len);

  int  (*read_frame_body)(struct reader *,unsigned char *,int size);

  int  (*back_bytes)(struct reader *,off_t bytes);

  int  (*back_frame)(struct reader *,struct frame *,long num);

  off_t (*tell)(struct reader *);

  void (*rewind)(struct reader *);

  off_t filelen;

  off_t filepos;

  int  filept;

  int  flags;

  unsigned char id3buf[128];

};

#endif

#define READER_FD_OPENED 0x1

#define READER_ID3TAG    0x2

#define READER_SEEKABLE  0x4

//extern void audio_flush(int, struct audio_info_struct *);

//extern void print_header(struct frame *);

//extern void print_header_compact(struct frame *);

//extern void print_id3_tag(unsigned char *buf);

//extern int split_dir_file(const char *path, char **dname, char **fname);

extern unsigned int   get1bit(void);

extern unsigned int   getbits(int);

extern unsigned int   getbits_fast(int);

//extern void           backbits(int);

//extern int            getbitoffset(void);

//extern int            getbyte(void);

//extern void set_pointer(long);

//extern unsigned char *pcm_sample;

//extern int pcm_point;

//extern int audiobufsize;

//extern int OutputDescriptor;

#ifdef VARMODESUPPORT

extern int varmode;

extern int playlimit;

#endif

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 open_stream(char *,int fd);

extern void read_frame_init (struct frame* fr);

int read_frame(struct reader *rd, struct frame *fr);

/* why extern? */

void prepare_audioinfo(struct frame *fr, struct audio_info_struct *nai);

int play_frame(int init,struct frame *fr);

int do_layer1(struct frame *fr,byte *pcm_sample, int *pcm_point);

int do_layer2(struct frame *fr,byte *pcm_sample, int *pcm_point);

int do_layer3(struct frame *fr,byte *pcm_sample, int *pcm_point);

extern void do_equalizer(real *bandPtr,int channel);

#ifdef PENTIUM_OPT

extern int synth_1to1_pent (real *,int,unsigned char *);

#endif

extern int synth_1to1 (real *,int,unsigned char *,int *);

extern int synth_1to1_8bit (real *,int,unsigned char *,int *);

extern int synth_1to1_mono (real *,unsigned char *,int *);

extern int synth_1to1_mono2stereo (real *,unsigned char *,int *);

extern int synth_1to1_8bit_mono (real *,unsigned char *,int *);

extern int synth_1to1_8bit_mono2stereo (real *,unsigned char *,int *);

extern int synth_2to1 (real *,int,unsigned char *,int *);

extern int synth_2to1_8bit (real *,int,unsigned char *,int *);

extern int synth_2to1_mono (real *,unsigned char *,int *);

extern int synth_2to1_mono2stereo (real *,unsigned char *,int *);

extern int synth_2to1_8bit_mono (real *,unsigned char *,int *);

extern int synth_2to1_8bit_mono2stereo (real *,unsigned char *,int *);

extern int synth_4to1 (real *,int,unsigned char *,int *);

extern int synth_4to1_8bit (real *,int,unsigned char *,int *);

extern int synth_4to1_mono (real *,unsigned char *,int *);

extern int synth_4to1_mono2stereo (real *,unsigned char *,int *);

extern int synth_4to1_8bit_mono (real *,unsigned char *,int *);

extern int synth_4to1_8bit_mono2stereo (real *,unsigned char *,int *);

extern int synth_ntom (real *,int,unsigned char *,int *);

extern int synth_ntom_8bit (real *,int,unsigned char *,int *);

extern int synth_ntom_mono (real *,unsigned char *,int *);

extern int synth_ntom_mono2stereo (real *,unsigned char *,int *);

extern int synth_ntom_8bit_mono (real *,unsigned char *,int *);

extern int synth_ntom_8bit_mono2stereo (real *,unsigned char *,int *);

extern void rewindNbits(int bits);

extern int  hsstell(void);

extern void set_pointer(long);

extern void huffman_decoder(int ,int *);

extern void huffman_count1(int,int *);

extern void print_stat(struct frame *fr,unsigned long no,long buffsize,struct audio_info_struct *ai);

extern int get_songlen(struct frame *fr,int no);

extern void init_layer3(int);

extern void init_layer2(void);

extern void make_decode_tables(long scale);

extern int make_conv16to8_table(int);

extern void dct64(real *,real *,real *);

#ifdef USE_MMX

extern void dct64_MMX(short *a,short *b,real *c);

extern int synth_1to1_MMX(real *, int, short *, short *, int *);

#endif

extern int synth_ntom_set_step(long,long);

extern unsigned char *conv16to8;

extern long freqs[9];

extern real muls[27][64];

extern real decwin[512+32];

#ifndef USE_MMX

extern real *pnts[5];

#endif

extern real equalizer[2][32];

extern real equalizer_sum[2][32];

extern int equalizer_cnt;

extern struct audio_name audio_val2name[];

//extern struct parameter param;

/* 486 optimizations */

#define FIR_BUFFER_SIZE  128

extern void dct64_486(int *a,int *b,real *c);

extern int synth_1to1_486(real *bandPtr,int channel,unsigned char *out,int nb_blocks);

/* 3DNow! optimizations */

#ifdef USE_3DNOW

extern int getcpuflags(void);

extern void dct36(real *,real *,real *,real *,real *);

extern void dct36_3dnow(real *,real *,real *,real *,real *);

extern int synth_1to1_3dnow(real *,int,unsigned char *,int *);

#endif

/* avoid the SIGINT in terminal control */

void next_track(void);

extern long outscale;

#endif

void set_pointer(long backstep);

int __stdcall create_reader(struct reader *rd,byte *buffer, int buffsize);

int __stdcall init_reader(struct reader *rd, char *file);

int __stdcall decode_header(struct frame *fr,unsigned long newhead);

int __stdcall set_reader(struct reader *rd, unsigned int filepos);

double pow_test(double, double);

void * __cdecl mem_cpy(void * dst,const void * src,size_t count);

void init_dct();

void reset_mpg();

#ifdef __cplusplus

}

#endif