int OPL_Init(unsigned int rate)
{
opl_sample_rate = rate;
opl_paused = 0;
pause_offset = 0;
// Queue structure of callbacks to invoke.
callback_queue = OPL_Queue_Create();
current_time = 0;
mix_buffer = malloc(opl_sample_rate * sizeof(uint32_t));
// Create the emulator structure:
DBOPL_InitTables();
Chip__Chip(&opl_chip);
Chip__Setup(&opl_chip, opl_sample_rate);
OPL_InitRegisters();
init_stage_reg_writes = 0;
return 1;
}
static int InitDriver(opl_driver_t *_driver, unsigned int port_base)
{
// Initialize the driver.
if (!_driver->init_func(port_base))
{
return 0;
}
// The driver was initialized okay, so we now have somewhere
// to write to. It doesn't mean there's an OPL chip there,
// though. Perform the detection sequence to make sure.
// (it's done twice, like how Doom does it).
driver = _driver;
init_stage_reg_writes = 1;
if (!OPL_Detect() || !OPL_Detect())
{
C_Printf(" OPL_Init: No OPL detected using '%s' driver.\n", _driver->name);
_driver->shutdown_func();
driver = NULL;
return 0;
}
// Initialize all registers.
OPL_InitRegisters();
init_stage_reg_writes = 0;
//C_Printf(" OPL_Init: Using driver '%s'.\n", driver->name);
return 1;
}
