int snd_init_firmware(const char *filename) {
file_t f;
size_t sz;
uint8 *buff;
f = fs_open(filename, O_RDONLY);
if(f < 0) {
ds_printf("DS_ERROR: Can't open firmware %s\n", filename);
return -1;
}
sz = fs_total(f);
ds_printf("DS_PROCESS: Loading firmware %s (%d bytes) into SPU RAM\n", filename, sz);
buff = (uint8*)malloc(sz);
fs_read(f, buff, sz);
fs_close(f);
spu_disable();
spu_memset(0, 0, AICA_RAM_START);
spu_memload(0, buff, sz);
/* Enable the AICA and give it a few ms to start up */
spu_enable();
timer_spin_sleep(10);
/* Initialize the RAM allocator */
snd_mem_init(AICA_RAM_START);
return 0;
}
/* Initialize driver; note that this replaces the AICA program so that
if you had anything else going on, it's gone now! */
int snd_init() {
int amt;
/* Finish loading the stream driver */
if (!initted) {
spu_disable();
spu_memset(0, 0, AICA_RAM_START);
amt = snd_stream_drv_end - snd_stream_drv;
if (amt % 4)
amt = (amt + 4) & ~3;
printf("snd_init(): loading %d bytes into SPU RAM\n", amt);
spu_memload(0, snd_stream_drv, amt);
/* Enable the AICA and give it a few ms to start up */
spu_enable();
timer_spin_sleep(10);
/* Initialize the RAM allocator */
snd_mem_init(AICA_RAM_START);
/* Setup semaphores */
sem_qram = sem_create(1);
}
initted = 1;
return 0;
}
