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-rw-r--r--src/devices/machine/spg2xx_audio.h372
1 files changed, 372 insertions, 0 deletions
diff --git a/src/devices/machine/spg2xx_audio.h b/src/devices/machine/spg2xx_audio.h
new file mode 100644
index 00000000000..22f5108e405
--- /dev/null
+++ b/src/devices/machine/spg2xx_audio.h
@@ -0,0 +1,372 @@
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+/*****************************************************************************
+
+ SunPlus SPG2xx-series SoC peripheral emulation (Audio)
+
+**********************************************************************/
+
+#ifndef MAME_MACHINE_SPG2XX_AUDIO_H
+#define MAME_MACHINE_SPG2XX_AUDIO_H
+
+#pragma once
+
+#include "sound/okiadpcm.h"
+#include "cpu/unsp/unsp.h"
+
+class spg2xx_audio_device : public device_t, public device_sound_interface
+{
+public:
+ spg2xx_audio_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+ spg2xx_audio_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ auto space_read_callback() { return m_space_read_cb.bind(); }
+ auto write_irq_callback() { return m_irq_cb.bind(); }
+
+ DECLARE_READ16_MEMBER(audio_r);
+ DECLARE_WRITE16_MEMBER(audio_w);
+ DECLARE_READ16_MEMBER(audio_ctrl_r);
+ DECLARE_WRITE16_MEMBER(audio_ctrl_w);
+ DECLARE_READ16_MEMBER(audio_phase_r);
+ DECLARE_WRITE16_MEMBER(audio_phase_w);
+
+protected:
+ // sound stream update overrides
+ virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
+
+ void audio_beat_tick();
+ void audio_rampdown_tick(const uint32_t channel);
+ bool audio_envelope_tick(const uint32_t channel);
+ inline uint32_t get_rampdown_frame_count(const uint32_t channel);
+ inline uint32_t get_envclk_frame_count(const uint32_t channel);
+
+ // Audio getters
+ bool get_channel_enable(const offs_t channel) const { return m_audio_ctrl_regs[AUDIO_CHANNEL_ENABLE] & (1 << channel); }
+ bool get_channel_status(const offs_t channel) const { return m_audio_ctrl_regs[AUDIO_CHANNEL_STATUS] & (1 << channel); }
+ bool get_manual_envelope_enable(const offs_t channel) const { return m_audio_ctrl_regs[AUDIO_CHANNEL_ENV_MODE] & (1 << channel); }
+ bool get_auto_envelope_enable(const offs_t channel) const { return !get_manual_envelope_enable(channel); }
+ uint32_t get_envelope_clock(const offs_t channel) const;
+ uint16_t get_vol_sel() const { return (m_audio_ctrl_regs[AUDIO_CONTROL] & AUDIO_CONTROL_VOLSEL_MASK) >> AUDIO_CONTROL_VOLSEL_SHIFT; }
+
+ // Audio Mode getters
+ uint16_t get_wave_addr_high(const offs_t channel) const { return m_audio_regs[(channel << 4) | AUDIO_MODE] & AUDIO_WADDR_HIGH_MASK; }
+ uint16_t get_loop_addr_high(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_MODE] & AUDIO_LADDR_HIGH_MASK) >> AUDIO_LADDR_HIGH_SHIFT; }
+ uint16_t get_tone_mode(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_MODE] & AUDIO_TONE_MODE_MASK) >> AUDIO_TONE_MODE_SHIFT; }
+ uint16_t get_16bit_bit(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_MODE] & AUDIO_16M_MASK) ? 1 : 0; }
+ uint16_t get_adpcm_bit(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_MODE] & AUDIO_ADPCM_MASK) ? 1 : 0; }
+
+ // Audio Pan getters
+ uint16_t get_volume(const offs_t channel) const { return m_audio_regs[(channel << 4) | AUDIO_PAN_VOL] & AUDIO_VOLUME_MASK; }
+ uint16_t get_pan(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_PAN_VOL] & AUDIO_PAN_MASK) >> AUDIO_PAN_SHIFT; }
+
+ // Audio Envelope0 Data getters
+ uint16_t get_envelope_inc(const offs_t channel) const { return m_audio_regs[(channel << 4) | AUDIO_ENVELOPE0] & AUDIO_ENVELOPE_INC_MASK; }
+ uint16_t get_envelope_sign_bit(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_ENVELOPE0] & AUDIO_ENVELOPE_SIGN_MASK) ? 1 : 0; }
+ uint16_t get_envelope_target(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_ENVELOPE0] & AUDIO_ENVELOPE_TARGET_MASK) >> AUDIO_ENVELOPE_TARGET_SHIFT; }
+ uint16_t get_repeat_period_bit(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_ENVELOPE0] & AUDIO_ENVELOPE_REPEAT_PERIOD_MASK) ? 1 : 0; }
+
+ // Audio Envelope Data getters
+ uint16_t get_edd(const offs_t channel) const { return m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_DATA] & AUDIO_EDD_MASK; }
+ uint16_t get_envelope_count(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_DATA] & AUDIO_ENVELOPE_COUNT_MASK) >> AUDIO_ENVELOPE_COUNT_SHIFT; }
+ void set_edd(const offs_t channel, uint8_t edd) { m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_DATA] = (m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_DATA] & ~AUDIO_EDD_MASK) | edd; }
+ void set_envelope_count(const offs_t channel, uint16_t count) { m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_DATA] = get_edd(channel) | (count << AUDIO_ENVELOPE_COUNT_SHIFT); }
+
+ // Audio Envelope1 Data getters
+ uint16_t get_envelope_load(const offs_t channel) const { return m_audio_regs[(channel << 4) | AUDIO_ENVELOPE1] & AUDIO_ENVELOPE_LOAD_MASK; }
+ uint16_t get_envelope_repeat_bit(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_ENVELOPE1] & AUDIO_ENVELOPE_RPT_MASK) ? 1 : 0; }
+ uint16_t get_envelope_repeat_count(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_ENVELOPE1] & AUDIO_ENVELOPE_RPCNT_MASK) >> AUDIO_ENVELOPE_RPCNT_SHIFT; }
+ inline void set_envelope_repeat_count(const offs_t channel, const uint16_t count) { m_audio_regs[(channel << 4) | AUDIO_ENVELOPE1] = (m_audio_regs[(channel << 4) | AUDIO_ENVELOPE1] & ~AUDIO_ENVELOPE_RPCNT_MASK) | ((count << AUDIO_ENVELOPE_RPCNT_SHIFT) & AUDIO_ENVELOPE_RPCNT_MASK); }
+
+ // Audio Envelope Address getters
+ uint16_t get_envelope_addr_high(const offs_t channel) const { return m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_ADDR_HIGH] & AUDIO_EADDR_HIGH_MASK; }
+ uint16_t get_audio_irq_enable_bit(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_ADDR_HIGH] & AUDIO_IRQ_EN_MASK) ? 1 : 0; }
+ uint16_t get_audio_irq_addr(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_ADDR_HIGH] & AUDIO_IRQ_ADDR_MASK) >> AUDIO_IRQ_ADDR_SHIFT; }
+
+ // Audio Envelope Loop getters
+ uint16_t get_envelope_eaoffset(const offs_t channel) const { return m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_LOOP_CTRL] & AUDIO_EAOFFSET_MASK; }
+ uint16_t get_rampdown_offset(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_LOOP_CTRL] & AUDIO_RAMPDOWN_OFFSET_MASK) >> AUDIO_RAMPDOWN_OFFSET_SHIFT; }
+ void set_envelope_eaoffset(const offs_t channel, uint16_t eaoffset) { m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_LOOP_CTRL] = (m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_LOOP_CTRL] & ~AUDIO_RAMPDOWN_OFFSET_MASK) | (eaoffset & AUDIO_EAOFFSET_MASK); }
+
+ // Audio ADPCM getters
+ uint16_t get_point_number(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_ADPCM_SEL] & AUDIO_POINT_NUMBER_MASK) >> AUDIO_POINT_NUMBER_SHIFT; }
+ uint16_t get_adpcm36_bit(const offs_t channel) const { return (m_audio_regs[(channel << 4) | AUDIO_ADPCM_SEL] & AUDIO_ADPCM36_MASK) ? 1 : 0; }
+
+ // Audio high-word getters
+ uint16_t get_phase_high(const offs_t channel) const { return m_audio_phase_regs[(channel << 4) | AUDIO_PHASE_HIGH] & AUDIO_PHASE_HIGH_MASK; }
+ uint16_t get_phase_accum_high(const offs_t channel) const { return m_audio_phase_regs[(channel << 4) | AUDIO_PHASE_ACCUM_HIGH] & AUDIO_PHASE_ACCUM_HIGH_MASK; }
+ uint16_t get_target_phase_high(const offs_t channel) const { return m_audio_phase_regs[(channel << 4) | AUDIO_TARGET_PHASE_HIGH] & AUDIO_TARGET_PHASE_HIGH_MASK; }
+ uint16_t get_rampdown_clock(const offs_t channel) const { return m_audio_phase_regs[(channel << 4) | AUDIO_RAMP_DOWN_CLOCK] & AUDIO_RAMP_DOWN_CLOCK_MASK; }
+
+ // Audio ADPCM getters
+ uint16_t get_phase_offset(const offs_t channel) const { return m_audio_phase_regs[(channel << 4) | AUDIO_PHASE_CTRL] & AUDIO_PHASE_OFFSET_MASK; }
+ uint16_t get_phase_sign_bit(const offs_t channel) const { return (m_audio_phase_regs[(channel << 4) | AUDIO_PHASE_CTRL] & AUDIO_PHASE_SIGN_MASK) >> AUDIO_PHASE_SIGN_SHIFT; }
+ uint16_t get_phase_time_step(const offs_t channel) const { return (m_audio_phase_regs[(channel << 4) | AUDIO_PHASE_CTRL] & AUDIO_PHASE_TIME_STEP_MASK) >> AUDIO_PHASE_TIME_STEP_SHIFT; }
+
+ // Audio combined getters
+ uint32_t get_phase(const offs_t channel) const { return ((uint32_t)get_phase_high(channel) << 16) | m_audio_phase_regs[(channel << 4) | AUDIO_PHASE]; }
+ uint32_t get_phase_accum(const offs_t channel) const { return ((uint32_t)get_phase_accum_high(channel) << 16) | m_audio_phase_regs[(channel << 4) | AUDIO_PHASE_ACCUM]; }
+ uint32_t get_target_phase(const offs_t channel) const { return ((uint32_t)get_target_phase_high(channel) << 16) | m_audio_phase_regs[(channel << 4) | AUDIO_TARGET_PHASE]; }
+
+ uint32_t get_wave_addr(const offs_t channel) const { return ((uint32_t)get_wave_addr_high(channel) << 16) | m_audio_regs[(channel << 4) | AUDIO_WAVE_ADDR]; }
+ uint32_t get_loop_addr(const offs_t channel) const { return ((uint32_t)get_loop_addr_high(channel) << 16) | m_audio_regs[(channel << 4) | AUDIO_LOOP_ADDR]; }
+ uint32_t get_envelope_addr(const offs_t channel) const { return ((uint32_t)get_envelope_addr_high(channel) << 16) | m_audio_regs[(channel << 4) | AUDIO_ENVELOPE_ADDR]; }
+
+ enum // at audio write offset 0x000 in spg2xx
+ {
+ AUDIO_WAVE_ADDR = 0x000,
+
+ AUDIO_MODE = 0x001,
+ AUDIO_WADDR_HIGH_MASK = 0x003f,
+ AUDIO_LADDR_HIGH_MASK = 0x0fc0,
+ AUDIO_LADDR_HIGH_SHIFT = 6,
+ AUDIO_TONE_MODE_MASK = 0x3000,
+ AUDIO_TONE_MODE_SHIFT = 12,
+ AUDIO_TONE_MODE_SW = 0,
+ AUDIO_TONE_MODE_HW_ONESHOT = 1,
+ AUDIO_TONE_MODE_HW_LOOP = 2,
+ AUDIO_16M_MASK = 0x4000,
+ AUDIO_ADPCM_MASK = 0x8000,
+
+ AUDIO_LOOP_ADDR = 0x002,
+
+ AUDIO_PAN_VOL = 0x003,
+ AUDIO_PAN_VOL_MASK = 0x7f7f,
+ AUDIO_VOLUME_MASK = 0x007f,
+ AUDIO_PAN_MASK = 0x7f00,
+ AUDIO_PAN_SHIFT = 8,
+
+ AUDIO_ENVELOPE0 = 0x004,
+ AUDIO_ENVELOPE_INC_MASK = 0x007f,
+ AUDIO_ENVELOPE_SIGN_MASK = 0x0080,
+ AUDIO_ENVELOPE_TARGET_MASK = 0x7f00,
+ AUDIO_ENVELOPE_TARGET_SHIFT = 8,
+ AUDIO_ENVELOPE_REPEAT_PERIOD_MASK = 0x8000,
+
+ AUDIO_ENVELOPE_DATA = 0x005,
+ AUDIO_ENVELOPE_DATA_MASK = 0xff7f,
+ AUDIO_EDD_MASK = 0x007f,
+ AUDIO_ENVELOPE_COUNT_MASK = 0xff00,
+ AUDIO_ENVELOPE_COUNT_SHIFT = 8,
+
+ AUDIO_ENVELOPE1 = 0x006,
+ AUDIO_ENVELOPE_LOAD_MASK = 0x00ff,
+ AUDIO_ENVELOPE_RPT_MASK = 0x0100,
+ AUDIO_ENVELOPE_RPCNT_MASK = 0xfe00,
+ AUDIO_ENVELOPE_RPCNT_SHIFT = 9,
+
+ AUDIO_ENVELOPE_ADDR_HIGH = 0x007,
+ AUDIO_EADDR_HIGH_MASK = 0x003f,
+ AUDIO_IRQ_EN_MASK = 0x0040,
+ AUDIO_IRQ_ADDR_MASK = 0xff80,
+ AUDIO_IRQ_ADDR_SHIFT = 7,
+
+ AUDIO_ENVELOPE_ADDR = 0x008,
+ AUDIO_WAVE_DATA_PREV = 0x009,
+
+ AUDIO_ENVELOPE_LOOP_CTRL = 0x00a,
+ AUDIO_EAOFFSET_MASK = 0x01ff,
+ AUDIO_RAMPDOWN_OFFSET_MASK = 0xfe00,
+ AUDIO_RAMPDOWN_OFFSET_SHIFT = 9,
+
+ AUDIO_WAVE_DATA = 0x00b,
+
+ AUDIO_ADPCM_SEL = 0x00d,
+ AUDIO_ADPCM_SEL_MASK = 0xfe00,
+ AUDIO_POINT_NUMBER_MASK = 0x7e00,
+ AUDIO_POINT_NUMBER_SHIFT = 9,
+ AUDIO_ADPCM36_MASK = 0x8000,
+ };
+
+ enum // at audio write offset 0x200 in spg2xx
+ {
+ AUDIO_PHASE_HIGH = 0x000,
+ AUDIO_PHASE_HIGH_MASK = 0x0007,
+
+ AUDIO_PHASE_ACCUM_HIGH = 0x001,
+ AUDIO_PHASE_ACCUM_HIGH_MASK = 0x0007,
+
+ AUDIO_TARGET_PHASE_HIGH = 0x002,
+ AUDIO_TARGET_PHASE_HIGH_MASK= 0x0007,
+
+ AUDIO_RAMP_DOWN_CLOCK = 0x003,
+ AUDIO_RAMP_DOWN_CLOCK_MASK = 0x0007,
+
+ AUDIO_PHASE = 0x004,
+ AUDIO_PHASE_ACCUM = 0x005,
+ AUDIO_TARGET_PHASE = 0x006,
+
+ AUDIO_PHASE_CTRL = 0x007,
+ AUDIO_PHASE_OFFSET_MASK = 0x0fff,
+ AUDIO_PHASE_SIGN_MASK = 0x1000,
+ AUDIO_PHASE_SIGN_SHIFT = 12,
+ AUDIO_PHASE_TIME_STEP_MASK = 0xe000,
+ AUDIO_PHASE_TIME_STEP_SHIFT = 13,
+
+ AUDIO_CHAN_OFFSET_MASK = 0xf0f,
+ };
+
+ enum // at audio write offset 0x400 in spg2xx
+ {
+
+ AUDIO_CHANNEL_ENABLE = 0x000,
+ AUDIO_CHANNEL_ENABLE_MASK = 0xffff,
+
+ AUDIO_MAIN_VOLUME = 0x001,
+ AUDIO_MAIN_VOLUME_MASK = 0x007f,
+
+ AUDIO_CHANNEL_FIQ_ENABLE = 0x002,
+ AUDIO_CHANNEL_FIQ_ENABLE_MASK = 0xffff,
+
+ AUDIO_CHANNEL_FIQ_STATUS = 0x003,
+ AUDIO_CHANNEL_FIQ_STATUS_MASK = 0xffff,
+
+ AUDIO_BEAT_BASE_COUNT = 0x004,
+ AUDIO_BEAT_BASE_COUNT_MASK = 0x07ff,
+
+ AUDIO_BEAT_COUNT = 0x005,
+ AUDIO_BEAT_COUNT_MASK = 0x3fff,
+ AUDIO_BIS_MASK = 0x4000,
+ AUDIO_BIE_MASK = 0x8000,
+
+ AUDIO_ENVCLK0 = 0x006,
+
+ AUDIO_ENVCLK0_HIGH = 0x007,
+ AUDIO_ENVCLK0_HIGH_MASK = 0xffff,
+
+ AUDIO_ENVCLK1 = 0x008,
+
+ AUDIO_ENVCLK1_HIGH = 0x009,
+ AUDIO_ENVCLK1_HIGH_MASK = 0xffff,
+
+ AUDIO_ENV_RAMP_DOWN = 0x00a,
+ AUDIO_ENV_RAMP_DOWN_MASK = 0xffff,
+
+ AUDIO_CHANNEL_STOP = 0x00b,
+ AUDIO_CHANNEL_STOP_MASK = 0xffff,
+
+ AUDIO_CHANNEL_ZERO_CROSS = 0x00c,
+ AUDIO_CHANNEL_ZERO_CROSS_MASK = 0xffff,
+
+ AUDIO_CONTROL = 0x00d,
+ AUDIO_CONTROL_MASK = 0x9fe8,
+ AUDIO_CONTROL_SATURATE_MASK = 0x8000,
+ AUDIO_CONTROL_SOFTCH_MASK = 0x1000,
+ AUDIO_CONTROL_COMPEN_MASK = 0x0800,
+ AUDIO_CONTROL_NOHIGH_MASK = 0x0400,
+ AUDIO_CONTROL_NOINT_MASK = 0x0200,
+ AUDIO_CONTROL_EQEN_MASK = 0x0100,
+ AUDIO_CONTROL_VOLSEL_MASK = 0x00c0,
+ AUDIO_CONTROL_VOLSEL_SHIFT = 6,
+ AUDIO_CONTROL_FOF_MASK = 0x0020,
+ AUDIO_CONTROL_INIT_MASK = 0x0008,
+
+ AUDIO_COMPRESS_CTRL = 0x00e,
+ AUDIO_COMPRESS_CTRL_PEAK_MASK = 0x8000,
+ AUDIO_COMPRESS_CTRL_THRESHOLD_MASK = 0x7f00,
+ AUDIO_COMPRESS_CTRL_THRESHOLD_SHIFT = 8,
+ AUDIO_COMPRESS_CTRL_ATTSCALE_MASK = 0x00c0,
+ AUDIO_COMPRESS_CTRL_ATTSCALE_SHIFT = 6,
+ AUDIO_COMPRESS_CTRL_RELSCALE_MASK = 0x0030,
+ AUDIO_COMPRESS_CTRL_RELSCALE_SHIFT = 4,
+ AUDIO_COMPRESS_CTRL_DISZC_MASK = 0x0008,
+ AUDIO_COMPRESS_CTRL_RATIO_MASK = 0x0007,
+
+ AUDIO_CHANNEL_STATUS = 0x00f,
+ AUDIO_CHANNEL_STATUS_MASK = 0xffff,
+
+ AUDIO_WAVE_IN_L = 0x010,
+
+ AUDIO_WAVE_IN_R = 0x011,
+ AUDIO_SOFTIRQ_MASK = 0x8000,
+ AUDIO_SOFTIRQ_EN_MASK = 0x4000,
+ AUDIO_SOFT_PHASE_HIGH_MASK = 0x0070,
+ AUDIO_SOFT_PHASE_HIGH_SHIFT = 4,
+ AUDIO_FIFO_IRQ_THRESHOLD_MASK = 0x000f,
+
+ AUDIO_WAVE_OUT_L = 0x012,
+ AUDIO_WAVE_OUT_R = 0x013,
+
+ AUDIO_CHANNEL_REPEAT = 0x014,
+ AUDIO_CHANNEL_REPEAT_MASK = 0xffff,
+
+ AUDIO_CHANNEL_ENV_MODE = 0x015,
+ AUDIO_CHANNEL_ENV_MODE_MASK = 0xffff,
+
+ AUDIO_CHANNEL_TONE_RELEASE = 0x016,
+ AUDIO_CHANNEL_TONE_RELEASE_MASK = 0xffff,
+
+ AUDIO_CHANNEL_ENV_IRQ = 0x017,
+ AUDIO_CHANNEL_ENV_IRQ_MASK = 0xffff,
+
+ AUDIO_CHANNEL_PITCH_BEND = 0x018,
+ AUDIO_CHANNEL_PITCH_BEND_MASK = 0xffff,
+
+ AUDIO_SOFT_PHASE = 0x019,
+
+ AUDIO_ATTACK_RELEASE = 0x01a,
+ AUDIO_RELEASE_TIME_MASK = 0x00ff,
+ AUDIO_ATTACK_TIME_MASK = 0xff00,
+ AUDIO_ATTACK_TIME_SHIFT = 8,
+
+ AUDIO_EQ_CUTOFF10 = 0x01b,
+ AUDIO_EQ_CUTOFF10_MASK = 0x7f7f,
+
+ AUDIO_EQ_CUTOFF32 = 0x01c,
+ AUDIO_EQ_CUTOFF32_MASK = 0x7f7f,
+
+ AUDIO_EQ_GAIN10 = 0x01d,
+ AUDIO_EQ_GAIN10_MASK = 0x7f7f,
+
+ AUDIO_EQ_GAIN32 = 0x01e,
+ AUDIO_EQ_GAIN32_MASK = 0x7f7f
+ };
+
+ static const device_timer_id TIMER_BEAT = 3;
+ void check_irqs(const uint16_t changed);
+
+ virtual void device_start() override;
+ virtual void device_reset() override;
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
+
+ uint16_t read_space(offs_t offset);
+
+ void stop_channel(const uint32_t channel);
+ bool advance_channel(const uint32_t channel);
+ bool fetch_sample(const uint32_t channel);
+ void loop_channel(const uint32_t channel);
+
+
+ bool m_debug_samples;
+ bool m_debug_rates;
+
+ uint16_t m_audio_regs[0x200];
+ uint16_t m_audio_phase_regs[0x200];
+ uint16_t m_audio_ctrl_regs[0x400];
+ uint8_t m_sample_shift[16];
+ uint32_t m_sample_count[16];
+ uint32_t m_sample_addr[16];
+ double m_channel_rate[16];
+ double m_channel_rate_accum[16];
+ uint32_t m_rampdown_frame[16];
+ uint32_t m_envclk_frame[16];
+ uint32_t m_envelope_addr[16];
+ int m_channel_debug;
+ uint16_t m_audio_curr_beat_base_count;
+
+ emu_timer *m_audio_beat;
+
+ sound_stream *m_stream;
+ oki_adpcm_state m_adpcm[16];
+
+ static const uint32_t s_rampdown_frame_counts[8];
+ static const uint32_t s_envclk_frame_counts[16];
+
+private:
+ devcb_read16 m_space_read_cb;
+ devcb_write_line m_irq_cb;
+
+};
+
+DECLARE_DEVICE_TYPE(SPG2XX_AUDIO, spg2xx_audio_device)
+
+#endif // MAME_MACHINE_SPG2XX_AUDIO_H