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// license:BSD-3-Clause
// copyright-holders:Anthony Kruize, Wilbert Pol
// thanks-to:Shay Green
#ifndef __GBSOUND_H__
#define __GBSOUND_H__
class gameboy_sound_device : public device_t,
public device_sound_interface
{
public:
gameboy_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
gameboy_sound_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, uint32_t clock, const char *shortname, const char *source);
DECLARE_READ8_MEMBER(sound_r);
virtual DECLARE_READ8_MEMBER(wave_r) = 0;
virtual DECLARE_WRITE8_MEMBER(sound_w) = 0;
virtual DECLARE_WRITE8_MEMBER(wave_w) = 0;
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// sound stream update overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
protected:
enum
{
NR10 = 0x00,
NR11 = 0x01,
NR12 = 0x02,
NR13 = 0x03,
NR14 = 0x04,
// 0x05
NR21 = 0x06,
NR22 = 0x07,
NR23 = 0x08,
NR24 = 0x09,
NR30 = 0x0A,
NR31 = 0x0B,
NR32 = 0x0C,
NR33 = 0x0D,
NR34 = 0x0E,
// 0x0F
NR41 = 0x10,
NR42 = 0x11,
NR43 = 0x12,
NR44 = 0x13,
NR50 = 0x14,
NR51 = 0x15,
NR52 = 0x16,
// 0x17 - 0x1F
AUD3W0 = 0x20,
AUD3W1 = 0x21,
AUD3W2 = 0x22,
AUD3W3 = 0x23,
AUD3W4 = 0x24,
AUD3W5 = 0x25,
AUD3W6 = 0x26,
AUD3W7 = 0x27,
AUD3W8 = 0x28,
AUD3W9 = 0x29,
AUD3WA = 0x2A,
AUD3WB = 0x2B,
AUD3WC = 0x2C,
AUD3WD = 0x2D,
AUD3WE = 0x2E,
AUD3WF = 0x2F
};
static const unsigned int FRAME_CYCLES = 8192;
static const int wave_duty_table[4][8];
sound_stream *m_channel;
struct SOUND
{
/* Common */
uint8_t reg[5];
bool on;
uint8_t channel;
uint8_t length;
uint8_t length_mask;
bool length_counting;
bool length_enabled;
/* Mode 1, 2, 3 */
uint64_t cycles_left;
int8_t duty;
/* Mode 1, 2, 4 */
bool envelope_enabled;
int8_t envelope_value;
int8_t envelope_direction;
uint8_t envelope_time;
uint8_t envelope_count;
int8_t signal;
/* Mode 1 */
uint16_t frequency;
uint16_t frequency_counter;
bool sweep_enabled;
bool sweep_neg_mode_used;
uint8_t sweep_shift;
int32_t sweep_direction;
uint8_t sweep_time;
uint8_t sweep_count;
/* Mode 3 */
uint8_t level;
uint8_t offset;
uint32_t duty_count;
int8_t current_sample;
bool sample_reading;
/* Mode 4 */
bool noise_short;
uint16_t noise_lfsr;
};
struct SOUND m_snd_1;
struct SOUND m_snd_2;
struct SOUND m_snd_3;
struct SOUND m_snd_4;
struct
{
uint8_t on;
uint8_t vol_left;
uint8_t vol_right;
uint8_t mode1_left;
uint8_t mode1_right;
uint8_t mode2_left;
uint8_t mode2_right;
uint8_t mode3_left;
uint8_t mode3_right;
uint8_t mode4_left;
uint8_t mode4_right;
uint64_t cycles;
bool wave_ram_locked;
} m_snd_control;
uint8_t m_snd_regs[0x30];
attotime m_last_updated;
emu_timer *m_timer;
virtual void apu_power_off() = 0;
void sound_w_internal(int offset, uint8_t data);
void update_square_channel(struct SOUND &snd, uint64_t cycles);
virtual void update_wave_channel(struct SOUND &snd, uint64_t cycles) = 0;
void update_noise_channel(struct SOUND &snd, uint64_t cycles);
int32_t calculate_next_sweep(struct SOUND &snd);
void apply_next_sweep(struct SOUND &snd);
void tick_length(struct SOUND &snd);
void tick_sweep(struct SOUND &snd);
void tick_envelope(struct SOUND &snd);
void update_state();
bool dac_enabled(struct SOUND &snd);
virtual void corrupt_wave_ram() { };
uint64_t noise_period_cycles();
TIMER_CALLBACK_MEMBER(timer_callback);
};
class dmg_apu_device : public gameboy_sound_device
{
public:
dmg_apu_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
virtual DECLARE_READ8_MEMBER(wave_r) override;
virtual DECLARE_WRITE8_MEMBER(wave_w) override;
virtual DECLARE_WRITE8_MEMBER(sound_w) override;
protected:
virtual void apu_power_off() override;
virtual void corrupt_wave_ram() override;
virtual void update_wave_channel(struct SOUND &snd, uint64_t cycles) override;
};
class cgb04_apu_device : public gameboy_sound_device
{
public:
cgb04_apu_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
virtual DECLARE_READ8_MEMBER(wave_r) override;
virtual DECLARE_WRITE8_MEMBER(wave_w) override;
virtual DECLARE_WRITE8_MEMBER(sound_w) override;
protected:
virtual void device_reset() override;
virtual void apu_power_off() override;
virtual void update_wave_channel(struct SOUND &snd, uint64_t cycles) override;
};
extern const device_type DMG_APU;
//extern const device_type CGB02_APU;
extern const device_type CGB04_APU;
//extern const device_type CGB05_APU;
#endif
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