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// license:BSD-3-Clause
// copyright-holders:Ernesto Corvi
/***************************************************************************
262intf.c
MAME interface for YMF262 (OPL3) emulator
***************************************************************************/
#include "emu.h"
#include "262intf.h"
#include "ymf262.h"
/* IRQ Handler */
static void IRQHandler(void *param,int irq)
{
ymf262_device *ymf262 = (ymf262_device *) param;
ymf262->_IRQHandler(irq);
}
void ymf262_device::_IRQHandler(int irq)
{
if (!m_irq_handler.isnull())
m_irq_handler(irq);
}
/* Timer overflow callback from timer.c */
void ymf262_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch(id)
{
case 0:
ymf262_timer_over(m_chip,0);
break;
case 1:
ymf262_timer_over(m_chip,1);
break;
}
}
static void timer_handler(void *param, int c, const attotime &period)
{
ymf262_device *ymf262 = (ymf262_device *) param;
ymf262->_timer_handler(c, period);
}
void ymf262_device::_timer_handler(int c, const attotime &period)
{
if( period == attotime::zero )
{ /* Reset FM Timer */
m_timer[c]->enable(false);
}
else
{ /* Start FM Timer */
m_timer[c]->adjust(period);
}
}
void ymf262_update_request(void *param, int interval)
{
ymf262_device *ymf262 = (ymf262_device *) param;
ymf262->_ymf262_update_request();
}
void ymf262_device::_ymf262_update_request()
{
m_stream->update();
}
//-------------------------------------------------
// sound_stream_update - handle a stream update
//-------------------------------------------------
void ymf262_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
{
ymf262_update_one(m_chip, outputs, samples);
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void ymf262_device::device_start()
{
int rate = clock()/288;
m_irq_handler.resolve();
/* stream system initialize */
m_chip = ymf262_init(this,clock(),rate);
assert_always(m_chip != NULL, "Error creating YMF262 chip");
m_stream = machine().sound().stream_alloc(*this,0,4,rate);
/* YMF262 setup */
ymf262_set_timer_handler (m_chip, timer_handler, this);
ymf262_set_irq_handler (m_chip, IRQHandler, this);
ymf262_set_update_handler(m_chip, ymf262_update_request, this);
m_timer[0] = timer_alloc(0);
m_timer[1] = timer_alloc(1);
}
//-------------------------------------------------
// device_stop - device-specific stop
//-------------------------------------------------
void ymf262_device::device_stop()
{
ymf262_shutdown(m_chip);
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void ymf262_device::device_reset()
{
ymf262_reset_chip(m_chip);
}
READ8_MEMBER( ymf262_device::read )
{
return ymf262_read(m_chip, offset & 3);
}
WRITE8_MEMBER( ymf262_device::write )
{
ymf262_write(m_chip, offset & 3, data);
}
const device_type YMF262 = &device_creator<ymf262_device>;
ymf262_device::ymf262_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, YMF262, "YMF262", tag, owner, clock, "ymf262", __FILE__),
device_sound_interface(mconfig, *this),
m_irq_handler(*this)
{
}
//-------------------------------------------------
// device_config_complete - perform any
// operations now that the configuration is
// complete
//-------------------------------------------------
void ymf262_device::device_config_complete()
{
}
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