mirror of https://github.com/ZDoom/gzdoom.git
108 lines
2.4 KiB
C
108 lines
2.4 KiB
C
/* Loads "test.spc", skips 5 seconds, saves exact emulator state to "state.bin",
|
|
hen records 5 seconds to "first.wav". When run again, loads this state back into
|
|
emulator and records 5 seconds to "second.wav". These two wave files should
|
|
be identical.
|
|
|
|
Usage: save_state [test.spc]
|
|
*/
|
|
|
|
#include "snes_spc/spc.h"
|
|
|
|
#include "wave_writer.h"
|
|
#include "demo_util.h" /* error(), load_file() */
|
|
|
|
static SNES_SPC* snes_spc;
|
|
|
|
void record_wav( const char* path, int secs )
|
|
{
|
|
/* Start writing wave file */
|
|
wave_open( spc_sample_rate, path );
|
|
wave_enable_stereo();
|
|
while ( wave_sample_count() < secs * spc_sample_rate * 2 )
|
|
{
|
|
/* Play into buffer */
|
|
#define BUF_SIZE 2048
|
|
short buf [BUF_SIZE];
|
|
error( spc_play( snes_spc, BUF_SIZE, buf ) );
|
|
|
|
wave_write( buf, BUF_SIZE );
|
|
}
|
|
wave_close();
|
|
}
|
|
|
|
void state_save( unsigned char** out, void* in, size_t size )
|
|
{
|
|
memcpy( *out, in, size );
|
|
*out += size;
|
|
}
|
|
|
|
void make_save_state( const char* path )
|
|
{
|
|
/* Load SPC */
|
|
long spc_size;
|
|
void* spc = load_file( path, &spc_size );
|
|
error( spc_load_spc( snes_spc, spc, spc_size ) );
|
|
free( spc );
|
|
spc_clear_echo( snes_spc );
|
|
|
|
/* Skip several seconds */
|
|
error( spc_play( snes_spc, 5 * spc_sample_rate * 2, 0 ) );
|
|
|
|
/* Save state to file */
|
|
{
|
|
static unsigned char state [spc_state_size]; /* buffer large enough for data */
|
|
unsigned char* out = state;
|
|
spc_copy_state( snes_spc, &out, state_save );
|
|
write_file( "state.bin", state, out - state );
|
|
}
|
|
|
|
record_wav( "first.wav", 5 );
|
|
}
|
|
|
|
void state_load( unsigned char** in, void* out, size_t size )
|
|
{
|
|
memcpy( out, *in, size );
|
|
*in += size;
|
|
}
|
|
|
|
void use_save_state()
|
|
{
|
|
/* Load state into memory */
|
|
long state_size;
|
|
unsigned char* state = load_file( "state.bin", &state_size );
|
|
|
|
/* Load into emulator */
|
|
unsigned char* in = state;
|
|
spc_copy_state( snes_spc, &in, state_load );
|
|
assert( in - state <= state_size ); /* be sure it didn't read past end */
|
|
|
|
record_wav( "second.wav", 5 );
|
|
}
|
|
|
|
int file_exists( const char* path )
|
|
{
|
|
FILE* file = fopen( path, "rb" );
|
|
if ( !file )
|
|
return 0;
|
|
|
|
fclose( file );
|
|
return 1;
|
|
}
|
|
|
|
int main( int argc, char** argv )
|
|
{
|
|
snes_spc = spc_new();
|
|
if ( !snes_spc ) error( "Out of memory" );
|
|
|
|
/* Make new state if it doesn't exist, otherwise load it and
|
|
record to wave file */
|
|
if ( !file_exists( "state.bin" ) )
|
|
make_save_state( (argc > 1) ? argv [1] : "test.spc" );
|
|
else
|
|
use_save_state();
|
|
|
|
spc_delete( snes_spc );
|
|
|
|
return 0;
|
|
}
|