/*------------------------------------------------------------------------------ File : user_interface.c Author : Stéphane TAVENARD $VER: user_interface.c 1.1 (27/07/1995) (C) Copyright 1995-1995 Stéphane TAVENARD All Rights Reserved #Rev| Date | Comment ----|----------|-------------------------------------------------------- 0 |05/06/1995| Initial revision ST 1 |23/06/1995| First release (aminet) ST 2 |27/07/1995| Added mixing frequency ST ------------------------------------------------------------------------ User (Text) interface for MPEG audio decoding ------------------------------------------------------------------------------*/ #include #include #include #include #include "mpega_decode_asm.h" #include "mpega_decode.h" #include "user_interface.h" #define NULL_CHAR '\0' static char *Version = "$VER:MPEGA (Fast MPEG audio decoder) V1.1 (C)Stéphane TAVENARD"; static char *mode_names[4] = { "stereo", "j-stereo", "dual-ch", "single-ch" }; static char *layer_names[3] = { "I", "II", "III" }; static char *programName; static int display_header_only = 0; static clock_t time_to_decode; static void write_header_info( frame_params *fr_ps, FILE *s ) { layer *info = fr_ps->header; fprintf( s, "HDR: s=FFF, id=%X, l=%X, ep=%X, br=%X, sf=%X, pd=%X, ", info->version, info->lay, !info->error_protection, info->bitrate_index, info->sampling_frequency, info->padding ); fprintf( s, "pr=%X, m=%X, js=%X, c=%X, o=%X, e=%X\n", info->extension, info->mode, info->mode_ext, info->copyright, info->original, info->emphasis ); fprintf( s, "layer=%s, tot bitrate=%d, sfrq=%d, mode=%s, ", layer_names[ info->lay-1 ], fr_ps->bitstream_rate, fr_ps->bitstream_freq, mode_names[ info->mode ] ); fprintf( s, "sblim=%d, jsbd=%d, ch=%d\n", fr_ps->sblimit, fr_ps->jsbound, fr_ps->stereo ); fflush( s ); } static void usage( void ) /*----------------------- Display MPEG Audio decoder usage */ { FILE *s; s = stderr; fprintf( s, "%s\n", &Version[ 5 ] ); fprintf( s, "Adapted from 'musicout' of MPEG/audio software simulation group\n" ); fprintf( s, "Fast integer version by Stéphane TAVENARD ["__DATE__"]\n" ); fprintf( s, "MPEG decoding has been optimzed (68020+ assembler rewritten) for layers I & II\n" ); fprintf( s, "Can play real time now (if you have enough CPU power) !\n" ); fprintf( s, "email: tavenard@xiii.univ-angers.fr\n\n" ); fprintf( s, "usage: %s -> queries for all arguments, or\n", programName); fprintf( s, " %s [-A][-d div][-q qual][-e sh][-h][-m][-p][-f 0|1][-x freq] inputBS [outPCM]\n", programName); fprintf( s, "where\n"); fprintf( s, " -A write an AIFF output PCM sound file\n"); fprintf( s, " -d div output frequency divide (1, 2 or 4)\n"); fprintf( s, " -q qual output quality (0=worst 2=best)\n"); fprintf( s, " -e sh 8 bits output with sh bits right shifted (8 usually)\n"); fprintf( s, " -h display header only\n" ); fprintf( s, " -m mono output (=left voice)\n" ); fprintf( s, " -p play audio\n" ); fprintf( s, " -f 0|1 audio filter off/on\n" ); fprintf( s, " -x freq mixing frequency\n" ); fprintf( s, " inputBS input bit stream of encoded audio\n"); fprintf( s, " outPCM output PCM sound file (dflt inName+%s)\n", DFLT_OPEXT ); fprintf( s, "\nEnjoy fast MPEG :-) \n" ); } void USIN_get_parameters( int argc, char **argv, frame_params *fr_ps ) /*-------------------------------------------------------------------- Get MPEG Audio decode parameters */ { static char encoded_file_name[ MAX_NAME_SIZE ]; static char decoded_file_name[ MAX_NAME_SIZE ]; char t[ 50 ]; int quality_set = 0; int audio_filter_set = 0; int value; programName = argv[ 0 ]; fr_ps->mixing_frequency = 0; if( argc == 1 ) { /* no command line args -> interact */ do { usage(); printf( "Enter encoded file name : " ); gets( encoded_file_name ); if( encoded_file_name[ 0 ] == NULL_CHAR ) printf( "Encoded file name is required. \n" ); } while( encoded_file_name[ 0 ] == NULL_CHAR ); printf( ">>> Encoded file name is: %s \n", encoded_file_name ); printf( "Do you want audio play ? (y/) : " ); gets( t ); if( (*t == 'y') || (*t == 'Y') ) { fr_ps->play = 1; } if( !fr_ps->play ) { printf( "Enter MPEG decoded file name <%s%s>: ", encoded_file_name, DFLT_OPEXT ); gets( decoded_file_name ); if( decoded_file_name[ 0 ] == NULL_CHAR ) { strcat( strcpy( decoded_file_name, encoded_file_name ), DFLT_OPEXT ); } printf( ">>> MPEG decoded file name is: %s \n", decoded_file_name ); } printf( "Frequency division output (<1>/2/4) : " ); gets( t ); fr_ps->freq_div = atoi( t ); if( (fr_ps->freq_div != 1) && (fr_ps->freq_div != 2) && (fr_ps->freq_div != 4) ) fr_ps->freq_div = 1; printf( "Ouput quality (0/1/<2>) : " ); gets( t ); if( !*t ) fr_ps->quality = 2; else fr_ps->quality = atoi( t ); if( fr_ps->quality < 0 ) fr_ps->quality = 0; else if( fr_ps->quality > 2 ) fr_ps->quality = 2; printf( "Do you want mono output ? (y/) : "); gets( t ); if( (*t == 'y') || (*t == 'Y') ) fr_ps->mono_forced = TRUE; printf( "Do you want 8 bits output ? (y/) : "); gets( t ); if( (*t == 'y') || (*t == 'Y') ) { fr_ps->output_8bits = 8; } if( !fr_ps->play ) { printf( "Do you wish to write an AIFF compatible sound file ? (y/) : " ); gets( t ); if( (*t == 'y') || (*t == 'Y') ) { fr_ps->out_file_type = MPEGA_FILETYPE_AIFF; printf( ">>> An AIFF compatible sound file will be written\n" ); } else { fr_ps->out_file_type = MPEGA_FILETYPE_RAW; printf( ">>> A non-headered PCM sound file will be written\n" ); } } printf( "Do you wish to exit (last chance before decoding) ? (y/) : " ); gets( t ); if( (*t == 'y') || (*t == 'Y') ) exit( 0 ); } else { /* interpret CL Args */ int i=0, err=0; encoded_file_name[ 0 ] = '\0'; decoded_file_name[ 0 ] = '\0'; while( (++iout_file_type = MPEGA_FILETYPE_AIFF; break; case 'd': value = atoi( arg ); argUsed = 1; switch( value ) { case 1: if( !quality_set ) fr_ps->quality = 2; if( !audio_filter_set ) fr_ps->audio_filter = 0; fr_ps->freq_div = value; break; case 2: if( !quality_set ) fr_ps->quality = 1; if( !audio_filter_set ) fr_ps->audio_filter = 0; fr_ps->freq_div = value; break; case 4: if( !quality_set ) fr_ps->quality = 0; if( !audio_filter_set ) fr_ps->audio_filter = 1; fr_ps->freq_div = value; break; default: fprintf( stderr, "%s: invalid option value -%c %ld\n", programName, c, value ); err = 1; break; } break; case 'q': value = atoi( arg ); argUsed = 1; switch( value ) { case 0: case 1: case 2: fr_ps->quality = value; quality_set = TRUE; break; default: fprintf( stderr, "%s: invalid option value -%c %ld\n", programName, c, value ); err = 1; break; } break; case 'f': value = atoi( arg ); argUsed = 1; switch( value ) { case 0: case 1: fr_ps->audio_filter = value; audio_filter_set = TRUE; break; default: fprintf( stderr, "%s: invalid option value -%c %ld\n", programName, c, value ); err = 1; break; } break; case 'e': fr_ps->output_8bits = atoi( arg ); argUsed = 1; if( fr_ps->output_8bits < 0 ) fr_ps->output_8bits = 0; else if( fr_ps->output_8bits > 8 ) fr_ps->output_8bits = 8; break; case 'm': fr_ps->mono_forced = TRUE; break; case 'p': fr_ps->play = TRUE; break; case 'h': display_header_only = TRUE; break; case 'x': fr_ps->mixing_frequency = atoi( arg ); argUsed = 1; break; default: fprintf( stderr,"%s: unrecognized option %c\n", programName, c ); err = 1; break; } if( argUsed ) { if( arg == token ) token = ""; /* no more from token */ else ++i; /* skip arg we used */ arg = ""; argUsed = 0; } } } else { if( encoded_file_name[ 0 ] == '\0' ) strcpy( encoded_file_name, argv[ i ] ); else if( decoded_file_name[ 0 ] == '\0' ) strcpy( decoded_file_name, argv[ i ] ); else { fprintf( stderr, "%s: excess arg %s\n", programName, argv[i] ); err = 1; } } } if( err || (encoded_file_name[ 0 ] == '\0') ) { usage(); exit( 0 ); } if( decoded_file_name[ 0 ] == '\0' ) { strcpy( decoded_file_name, encoded_file_name ); strcat( decoded_file_name, DFLT_OPEXT ); } } /* report results of dialog / command line */ if( !display_header_only ) { if( !fr_ps->play ) { printf( "Input file = '%s' output file = '%s'\n", encoded_file_name, decoded_file_name ); } else { printf( "Input file = '%s' output -> audio\n", encoded_file_name ); } if( fr_ps->out_file_type == MPEGA_FILETYPE_AIFF ) { printf("Output file written in AIFF format\n"); } if( fr_ps->freq_div != 1 ) { printf( "Output frequency/%ld.\n", fr_ps->freq_div ); } if( fr_ps->mono_forced ) { printf( "Mono ouput forced.\n" ); } if( fr_ps->output_8bits ) { printf( "8 bits output selected.\n" ); } printf( "Output quality %ld\n", fr_ps->quality ); } fr_ps->bitstream_name = encoded_file_name; if( display_header_only ) { fr_ps->out_file_name = NULL; } else { fr_ps->out_file_name = decoded_file_name; } } void USIN_display_info( frame_params *fr_ps ) /*----------------------------------------- display current frame info -> exit if display_header_only is set */ { write_header_info( fr_ps, stderr ); if( display_header_only ) exit( 0 ); time_to_decode = clock(); } void USIN_display_frame_number( frame_params *fr_ps ) /*--------------------------------------------------- display current frame number -> exit if display_header_only is set */ { fprintf( stderr, "{%4lu}\r", fr_ps->frame_count ); fflush( stderr ); } void USIN_epilog( frame_params *fr_ps ) /*------------------------------------- Write epilog info */ { time_to_decode = clock() - time_to_decode; if( fr_ps->out_sample_freq ) { printf( "Stream time=%.2lf sec\n", (double)(fr_ps->out_sample_length) / (double)(fr_ps->out_sample_freq) ); } printf( "Total time used to decode the stream was %.2lf secs.\n", (double)time_to_decode / CLK_TCK); }