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https://github.com/RetroDECK/Supermodel.git
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181 lines
4.3 KiB
C
181 lines
4.3 KiB
C
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/* this file is a part of amp software, (C) tomislav uzelac 1996,1997
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*/
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/* audio.h some global variables
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*
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* Created by: tomislav uzelac Mar/Apr, Jul 96
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*/
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#include <stdio.h>
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struct AUDIO_HEADER {
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int ID;
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int layer;
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int protection_bit;
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int bitrate_index;
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int sampling_frequency;
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int padding_bit;
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int private_bit;
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int mode;
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int mode_extension;
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int copyright;
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int original;
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int emphasis;
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};
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struct SIDE_INFO {
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int main_data_begin;
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int scfsi[2][4];
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int part2_3_length[2][2];
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int big_values[2][2];
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int global_gain[2][2];
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int scalefac_compress[2][2];
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int window_switching_flag[2][2];
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int block_type[2][2];
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int mixed_block_flag[2][2];
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int table_select[2][2][3];
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int subblock_gain[2][2][3];
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int region0_count[2][2];
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int region1_count[2][2];
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int preflag[2][2];
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int scalefac_scale[2][2];
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int count1table_select[2][2];
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};
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/* global stuff
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*/
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extern FILE *in_file,*out_file;
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extern void statusDisplay(struct AUDIO_HEADER *header, int frameNo);
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extern int decodeMPEG(void);
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extern void initialise_globals(void);
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extern void report_header_error(int err);
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extern int scalefac_l[2][2][22];
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extern int scalefac_s[2][2][13][3];
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extern int t_b8_l[2][3][22];
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extern int t_b8_s[2][3][13];
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extern short t_bitrate[2][3][15];
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extern int is[2][578];
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extern float xr[2][32][18];
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extern int *t_l,*t_s;
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extern int nch;
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extern int t_sampling_frequency[2][3];
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extern int A_QUIET,A_SHOW_CNT,A_FORMAT_WAVE,A_DUMP_BINARY;
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extern int A_WRITE_TO_AUDIO,A_WRITE_TO_FILE;
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extern short pcm_sample[64];
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extern int A_AUDIO_PLAY;
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extern int A_SET_VOLUME,A_SHOW_TIME;
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extern int A_MSG_STDOUT;
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extern int A_DOWNMIX;
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/* GUI CONTROL STUFF */
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extern int GUI_PLAY;
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extern int GUI_PLAYING;
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extern int GUI_PAUSE;
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extern int GUI_PAUSED;
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extern int GUI_STOP;
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extern int GUI_STOPPED;
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extern int GUI_FD_TO_PLAY;
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extern int GUI_NEXT_FILE_READY;
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/* GUI control stuff */
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extern int send_fd;
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extern int receive_fd;
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extern int stop_flag;
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extern int quit_flag;
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/* ...
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*/
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#ifdef AUDIO
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FILE *in_file,*out_file;
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int scalefac_l[2][2][22];
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int scalefac_s[2][2][13][3];
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int is[2][578];
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float xr[2][32][18];
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int *t_l,*t_s;
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int nch;
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int t_sampling_frequency[2][3] = {
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{ 22050 , 24000 , 16000},
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{ 44100 , 48000 , 32000}
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};
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/* GUI control stuff */
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int send_fd;
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int receive_fd;
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int stop_flag;
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int quit_flag;
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int GUI_PLAY,GUI_PLAYING,GUI_STOP,GUI_STOPPED,GUI_PAUSE,GUI_PAUSED;
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int GUI_FD_TO_PLAY,GUI_NEXT_FILE_READY;
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int A_QUIET,A_SHOW_CNT,A_FORMAT_WAVE,A_DUMP_BINARY;
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int A_WRITE_TO_FILE;
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int A_AUDIO_PLAY;
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int A_SET_VOLUME, A_SHOW_TIME;
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int A_MSG_STDOUT;
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int A_DOWNMIX;
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short pcm_sample[64];
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short t_bitrate[2][3][15] = {{
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{0,32,48,56,64,80,96,112,128,144,160,176,192,224,256},
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{0,8,16,24,32,40,48,56,64,80,96,112,128,144,160},
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{0,8,16,24,32,40,48,56,64,80,96,112,128,144,160}
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},{
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{0,32,64,96,128,160,192,224,256,288,320,352,384,416,448},
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{0,32,48,56,64,80,96,112,128,160,192,224,256,320,384},
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{0,32,40,48,56,64,80,96,112,128,160,192,224,256,320}
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}};
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/* the last sfb is given implicitly on pg.28. of the standard. scalefactors
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* for that one are 0, pretab also
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*/
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/* leftmost index denotes ID, so first three tables are for MPEG2 (header->ID==0)
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* and the other three are for MPEG1 (header->ID==1)
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*/
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/* 22.05, 24, 16 */
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int t_b8_l[2][3][22]={{ /* table B.8b ISO/IEC 11172-3 */
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{5,11,17,23,29,35,43,53,65,79,95,115,139,167,199,237,283,335,395,463,521,575},
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{5,11,17,23,29,35,43,53,65,79,95,113,135,161,193,231,277,331,393,463,539,575},
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{5,11,17,23,29,35,43,53,65,79,95,115,139,167,199,237,283,335,395,463,521,575}
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},{
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{3,7,11,15,19,23,29,35,43,51,61,73,89,109,133,161,195,237,287,341,417,575},
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{3,7,11,15,19,23,29,35,41,49,59,71,87,105,127,155,189,229,275,329,383,575},
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{3,7,11,15,19,23,29,35,43,53,65,81,101,125,155,193,239,295,363,447,549,575}
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}};
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int t_b8_s[2][3][13]={{ /* table B.8b ISO/IEC 11172-3 */
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{3,7,11,17,23,31,41,55,73,99,131,173,191},
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{3,7,11,17,25,35,47,61,79,103,135,179,191},
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{3,7,11,17,25,35,47,61,79,103,133,173,191}
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},{
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{3,7,11,15,21,29,39,51,65,83,105,135,191},
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{3,7,11,15,21,27,37,49,63,79,99,125,191},
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{3,7,11,15,21,29,41,57,77,103,137,179,191}
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}};
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int args(int argc,char **argv);
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void initialise_decoder(void);
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int decodeMPEG(void);
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void initialise_globals(void);
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void report_header_error(int err);
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int setup_audio(struct AUDIO_HEADER *header);
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void close_audio(void);
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int ready_audio(void);
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void play(char *inFileStr, char *outFileStr);
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#endif /* AUDIO */
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