Mercurial > spc_convert

     1 /* Records SPC into wave file. Uses dsp_filter to give more authentic sound.

     2 

     3    Usage: spc_convert -s seconds -i input.spc -o output.wav

     4 */

     5 

     6 #include "snes_spc/spc.h"

     7 

     8 #include "demo/wave_writer.h"

     9 #include "demo/demo_util.h" /* error(), load_file() */

    10 

    11 int main( int argc, char** argv )

    12 {

    13   /* Create emulator and filter */

    14   SNES_SPC* snes_spc = spc_new();

    15   SPC_Filter* filter = spc_filter_new();

    16   if ( !snes_spc || !filter ) error( "Out of memory" );

    17   

    18   int seconds = atoi(argv[2]);

    19 

    20   if (argc != 7) { 

    21     error("Incorrect Arguments\n Sample invocation: \n  spc_convert -s 5 -i input.spc -o output.wav");

    22   }

    23 

    24   if (seconds <=0){

    25     error("seconds must be positive.");

    26   }

    27 

    28   /* Load SPC */

    29   {

    30     /* Load file into memory */

    31     long spc_size;

    32     void* spc = load_file( argv[4] , &spc_size );

    33 		

    34     /* Load SPC data into emulator */

    35     error( spc_load_spc( snes_spc, spc, spc_size ) );

    36     free( spc ); /* emulator makes copy of data */

    37 		

    38     /* Most SPC files have garbage data in the echo buffer, so clear that */

    39     spc_clear_echo( snes_spc );

    40 		

    41     /* Clear filter before playing */

    42     spc_filter_clear( filter );

    43   }

    44 	

    45   /* Record 20 seconds to wave file */

    46   wave_open( spc_sample_rate, argv[6] );

    47   wave_enable_stereo();

    48   while ( wave_sample_count() < seconds * spc_sample_rate * 2 )

    49     {

    50       /* Play into buffer */

    51 #define BUF_SIZE 2048

    52       short buf [BUF_SIZE];

    53       error( spc_play( snes_spc, BUF_SIZE, buf ) );

    54 		

    55       /* Filter samples */

    56       spc_filter_run( filter, buf, BUF_SIZE );

    57 		

    58       wave_write( buf, BUF_SIZE );

    59     }

    60 	

    61   /* Cleanup */

    62   spc_filter_delete( filter );

    63   spc_delete( snes_spc );

    64   wave_close();

    65 	

    66   return 0;

    67 }
author	Robert McIntyre <rlm@mit.edu>
date	Fri, 21 Oct 2011 07:46:18 -0700
parents	a37863126396
children