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 (seconds <=0){

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

    22   }

    23 

    24   if (argc != 7) { 

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

    26   }

    27   /* Load SPC */

    28   {

    29     /* Load file into memory */

    30     long spc_size;

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

    32 		

    33     /* Load SPC data into emulator */

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

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

    36 		

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

    38     spc_clear_echo( snes_spc );

    39 		

    40     /* Clear filter before playing */

    41     spc_filter_clear( filter );

    42   }

    43 	

    44   /* Record 20 seconds to wave file */

    45   wave_open( spc_sample_rate, argv[6] );

    46   wave_enable_stereo();

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

    48     {

    49       /* Play into buffer */

    50 #define BUF_SIZE 2048

    51       short buf [BUF_SIZE];

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

    53 		

    54       /* Filter samples */

    55       spc_filter_run( filter, buf, BUF_SIZE );

    56 		

    57       wave_write( buf, BUF_SIZE );

    58     }

    59 	

    60   /* Cleanup */

    61   spc_filter_delete( filter );

    62   spc_delete( snes_spc );

    63   wave_close();

    64 	

    65   return 0;

    66 }
author	Robert McIntyre <rlm@mit.edu>
date	Fri, 21 Oct 2011 06:54:14 -0700
parents	95cdedd01422
children	a37863126396