/* this file is a part of amp software, (C) tomislav uzelac 1996,1997
*/

/* audio.h  some global variables
 *
 * Created by: tomislav uzelac Mar/Apr, Jul 96
 * Last modified by:
 */

/* these should not be touched
*/
#define         SYNCWORD        0xfff
#define         TRUE            1
#define         FALSE           0
/* version 
*/
#define         MAJOR           0
#define         MINOR           7
#define         PATCH           1

#include <stdio.h>

#if defined(A_SIF_IRIX)
#include <dmedia/audio.h>
#endif /* A_SIF_IRIX */


struct AUDIO_HEADER {
	int ID;
	int layer;
	int protection_bit;
	int bitrate_index;
	int sampling_frequency;
	int padding_bit;
	int private_bit;
	int mode;
	int mode_extension;
	int copyright;
	int original;
	int emphasis;
};

struct SIDE_INFO {
	int main_data_begin;
	int scfsi[2][4];
	int part2_3_length[2][2];
	int big_values[2][2];
	int global_gain[2][2];
	int scalefac_compress[2][2];
	int window_switching_flag[2][2];
	int block_type[2][2];
	int mixed_block_flag[2][2];
	int table_select[2][2][3];
	int subblock_gain[2][2][3];
	int region0_count[2][2];
	int region1_count[2][2];
	int preflag[2][2];
	int scalefac_scale[2][2];
	int count1table_select[2][2];
};

/* global stuff 
*/
extern FILE *in_file,*out_file;
#if defined(A_SIF_IRIX)
extern ALport audioport;
#else
extern int audio_fd;
#endif
 


extern int scalefac_l[2][2][22];
extern int scalefac_s[2][2][13][3];
extern int t_b8_l[2][3][22];
extern int t_b8_s[2][3][13];
extern short t_bitrate[2][3][15];

extern int is[2][578];
extern float xr[2][576];

extern int *t_l,*t_s;
extern int nch;
extern int t_sampling_frequency[2][3];

extern int SHOW_HEADER,SHOW_HEADER_DETAIL;
extern int SHOW_SIDE_INFO,SHOW_SIDE_INFO_DETAIL;
extern int SHOW_MDB,SHOW_MDB_DETAIL;
extern int SHOW_HUFFMAN_ERRORS,SHOW_HUFFBITS;
extern int SHOW_SCFSI,SHOW_BLOCK_TYPE,SHOW_TABLES,SHOW_BITRATE;
extern int A_SUPRESS_STDOUT,A_SHOW_CNT,A_FORMAT_WAVE,A_DUMP_BINARY;
extern int A_WRITE_TO_AUDIO,A_WRITE_TO_FILE;
#ifdef MONO
extern int AMIGA_MONO;
#endif
#ifdef FREQDIV
extern int AMIGA_FREQDIV;
extern int AMIGA_FDIV;
extern int AMIGA_FSIZE;
#endif


#define MAX(a,b)  ((a) > (b) ? (a) : (b))
#define MIN(a,b)  ((a) < (b) ? (a) : (b))

/* ...
*/
#ifdef AUDIO

FILE *in_file,*out_file;
#if defined(A_SIF_IRIX)
ALport audioport;
#else /* A_SIF_IRIX */
int audio_fd;
#endif /* all others */
 
int scalefac_l[2][2][22];
int scalefac_s[2][2][13][3];

int is[2][578];
float xr[2][576];

int *t_l,*t_s;
int nch;
int t_sampling_frequency[2][3] = {
{ 22050 , 24000 , 16000},
{ 44100 , 48000 , 32000}
};

int SHOW_HEADER,SHOW_HEADER_DETAIL;
int SHOW_SIDE_INFO,SHOW_SIDE_INFO_DETAIL;
int SHOW_MDB,SHOW_MDB_DETAIL;
int SHOW_HUFFMAN_ERRORS,SHOW_HUFFBITS;
int SHOW_SCFSI,SHOW_BLOCK_TYPE,SHOW_TABLES,SHOW_BITRATE;
int A_SUPRESS_STDOUT,A_SHOW_CNT,A_FORMAT_WAVE,A_DUMP_BINARY;
int A_WRITE_TO_AUDIO,A_WRITE_TO_FILE;
#ifdef MONO
int AMIGA_MONO;
#endif
#ifdef FREQDIV
int AMIGA_FREQDIV;
int AMIGA_FDIV;
int AMIGA_FSIZE;
#endif

short t_bitrate[2][3][15] = {{
{0,32,48,56,64,80,96,112,128,144,160,176,192,224,256},
{0,8,16,24,32,40,48,56,64,80,96,112,128,144,160},
{0,8,16,24,32,40,48,56,64,80,96,112,128,144,160}
},{
{0,32,64,96,128,160,192,224,256,288,320,352,384,416,448},
{0,32,48,56,64,80,96,112,128,160,192,224,256,320,384},
{0,32,40,48,56,64,80,96,112,128,160,192,224,256,320}
}};

/* the last sfb is given implicitly on pg.28. of the standard. scalefactors 
 * for that one are 0, pretab also 
 */
/* leftmost index denotes ID, so first three tables are for MPEG2 (header->ID==0)
 * and the other three are for MPEG1 (header->ID==1)
 */
/* 22.05, 24, 16 */
int t_b8_l[2][3][22]={{ /* table B.8b ISO/IEC 11172-3 */
{5,11,17,23,29,35,43,53,65,79,95,115,139,167,199,237,283,335,395,463,521,575},
{5,11,17,23,29,35,43,53,65,79,95,113,135,161,193,231,277,331,393,463,539,575},
{5,11,17,23,29,35,43,53,65,79,95,115,139,167,199,237,283,335,395,463,521,575}
},{
{3,7,11,15,19,23,29,35,43,51,61,73,89,109,133,161,195,237,287,341,417,575},
{3,7,11,15,19,23,29,35,41,49,59,71,87,105,127,155,189,229,275,329,383,575},
{3,7,11,15,19,23,29,35,43,53,65,81,101,125,155,193,239,295,363,447,549,575}
}};   
int t_b8_s[2][3][13]={{ /* table B.8b ISO/IEC 11172-3 */
{3,7,11,17,23,31,41,55,73,99,131,173,191},
{3,7,11,17,25,35,47,61,79,103,135,179,191},
{3,7,11,17,25,35,47,61,79,103,133,173,191}
},{
{3,7,11,15,21,29,39,51,65,83,105,135,191},
{3,7,11,15,21,27,37,49,63,79,99,125,191},
{3,7,11,15,21,29,41,57,77,103,137,179,191}
}};

static inline void args(int argc,char **argv);
#endif /* AUDIO */