gzdoom/snes_spc/demo/play_spc.c

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/* Records SPC into wave file. Uses dsp_filter to give more authentic sound.
Usage: play_spc [test.spc]
*/
#include "snes_spc/spc.h"
#include "wave_writer.h"
#include "demo_util.h" /* error(), load_file() */
int main( int argc, char** argv )
{
/* Create emulator and filter */
SNES_SPC* snes_spc = spc_new();
SPC_Filter* filter = spc_filter_new();
if ( !snes_spc || !filter ) error( "Out of memory" );
/* Load SPC */
{
/* Load file into memory */
long spc_size;
void* spc = load_file( (argc > 1) ? argv [1] : "test.spc", &spc_size );
/* Load SPC data into emulator */
error( spc_load_spc( snes_spc, spc, spc_size ) );
free( spc ); /* emulator makes copy of data */
/* Most SPC files have garbage data in the echo buffer, so clear that */
spc_clear_echo( snes_spc );
/* Clear filter before playing */
spc_filter_clear( filter );
}
/* Record 20 seconds to wave file */
wave_open( spc_sample_rate, "out.wav" );
wave_enable_stereo();
while ( wave_sample_count() < 20 * spc_sample_rate * 2 )
{
/* Play into buffer */
#define BUF_SIZE 2048
short buf [BUF_SIZE];
error( spc_play( snes_spc, BUF_SIZE, buf ) );
/* Filter samples */
spc_filter_run( filter, buf, BUF_SIZE );
wave_write( buf, BUF_SIZE );
}
/* Cleanup */
spc_filter_delete( filter );
spc_delete( snes_spc );
wave_close();
return 0;
}