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// license:BSD-3-Clause
// copyright-holders:Takahiro Nogi, David Haywood
#ifndef MAME_AUDIO_GOMOKU_H
#define MAME_AUDIO_GOMOKU_H
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> gomoku_sound_device
class gomoku_sound_device : public device_t,
public device_sound_interface
{
public:
gomoku_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 48'000);
void sound1_w(offs_t offset, uint8_t data);
void sound2_w(offs_t offset, uint8_t data);
protected:
// device-level overrides
virtual void device_start() override;
// sound stream update overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
private:
void make_mixer_table(int voices, int gain);
// 4 voices max
static constexpr unsigned MAX_VOICES = 4;
struct sound_channel
{
sound_channel() { }
int channel = 0;
int frequency = 0;
int counter = 0;
int volume = 0;
int oneshotplaying = 0;
};
// data about the sound system
sound_channel m_channel_list[MAX_VOICES];
// global sound parameters
required_region_ptr<uint8_t> m_sound_rom;
bool m_sound_enable;
sound_stream *m_stream;
// mixer tables and internal buffers
std::unique_ptr<int16_t[]> m_mixer_table;
int16_t *m_mixer_lookup;
std::unique_ptr<short[]> m_mixer_buffer;
short *m_mixer_buffer_2;
uint8_t m_soundregs1[0x20];
uint8_t m_soundregs2[0x20];
};
DECLARE_DEVICE_TYPE(GOMOKU_SOUND, gomoku_sound_device)
#endif // MAME_AUDIO_GOMOKU_H
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