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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
#ifndef MAME_SOUND_YM2612_H
#define MAME_SOUND_YM2612_H
#pragma once
#include "ymfm.h"
// ======================> ym2612_device
DECLARE_DEVICE_TYPE(YM2612, ym2612_device);
class ym2612_device : public device_t, public device_sound_interface
{
public:
// constructor
ym2612_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, device_type type = YM2612);
// configuration helpers
auto irq_handler() { return m_opn.irq_handler(); }
// read/write access
u8 read(offs_t offset);
void write(offs_t offset, u8 data);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_clock_changed() override;
// sound overrides
virtual void sound_stream_update(sound_stream &stream, std::vector<read_stream_view> const &inputs, std::vector<write_stream_view> &outputs) override;
// internal helpers
void sound_stream_update_common(write_stream_view &outl, write_stream_view &outr, bool discontinuity);
// internal state
ymopna_engine m_opn; // core OPN engine
sound_stream *m_stream; // sound stream
attotime m_busy_duration; // precomputed busy signal duration
u16 m_address; // address register
u16 m_dac_data; // 9-bit DAC data
u8 m_dac_enable; // DAC enabled?
u8 m_channel; // current multiplexed channel
};
// ======================> ym3438_device
DECLARE_DEVICE_TYPE(YM3438, ym3438_device);
class ym3438_device : public ym2612_device
{
public:
// constructor
ym3438_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
protected:
// sound overrides
virtual void sound_stream_update(sound_stream &stream, std::vector<read_stream_view> const &inputs, std::vector<write_stream_view> &outputs) override;
};
// ======================> ymf276_device
DECLARE_DEVICE_TYPE(YMF276, ymf276_device);
class ymf276_device : public ym2612_device
{
public:
// constructor
ymf276_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
protected:
// device-level overrides
virtual void device_clock_changed() override;
// sound overrides
virtual void sound_stream_update(sound_stream &stream, std::vector<read_stream_view> const &inputs, std::vector<write_stream_view> &outputs) override;
};
#endif // MAME_SOUND_YM2612_H
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