// license:BSD-3-Clause // copyright-holders:Aaron Giles /********************************************************************************************** * * Yamaha YMZ280B driver * by Aaron Giles * **********************************************************************************************/ #ifndef MAME_SOUND_YMZ280B_H #define MAME_SOUND_YMZ280B_H #pragma once #define YMZ280B_MAKE_WAVS 0 class ymz280b_device : public device_t, public device_sound_interface, public device_rom_interface { public: ymz280b_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); // configuration helpers auto irq_handler() { return m_irq_handler.bind(); } u8 read(offs_t offset); void write(offs_t offset, u8 data); protected: // device-level overrides virtual void device_start() override; virtual void device_post_load() override; virtual void device_reset() override; virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; virtual void device_clock_changed() override; // sound stream update overrides virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override; // device_rom_interface overrides virtual void rom_bank_updated() override; private: /* struct describing a single playing ADPCM voice */ struct YMZ280BVoice { uint8_t playing; /* 1 if we are actively playing */ bool ended; /* indicate voice has ended in case samples_left is 0 */ uint8_t keyon; /* 1 if the key is on */ uint8_t looping; /* 1 if looping is enabled */ uint8_t mode; /* current playback mode */ uint16_t fnum; /* frequency */ uint8_t level; /* output level */ uint8_t pan; /* panning */ uint32_t start; /* start address, in nibbles */ uint32_t stop; /* stop address, in nibbles */ uint32_t loop_start; /* loop start address, in nibbles */ uint32_t loop_end; /* loop end address, in nibbles */ uint32_t position; /* current position, in nibbles */ int32_t signal; /* current ADPCM signal */ int32_t step; /* current ADPCM step */ int32_t loop_signal; /* signal at loop start */ int32_t loop_step; /* step at loop start */ uint32_t loop_count; /* number of loops so far */ int32_t output_left; /* output volume (left) */ int32_t output_right; /* output volume (right) */ int32_t output_step; /* step value for frequency conversion */ int32_t output_pos; /* current fractional position */ int16_t last_sample; /* last sample output */ int16_t curr_sample; /* current sample target */ uint8_t irq_schedule; /* 1 if the IRQ state is updated by timer */ emu_timer *timer; }; void update_irq_state(); void update_step(struct YMZ280BVoice *voice); void update_volumes(struct YMZ280BVoice *voice); void update_irq_state_timer_common(int voicenum); int generate_adpcm(struct YMZ280BVoice *voice, int16_t *buffer, int samples); int generate_pcm8(struct YMZ280BVoice *voice, int16_t *buffer, int samples); int generate_pcm16(struct YMZ280BVoice *voice, int16_t *buffer, int samples); void write_to_register(int data); int compute_status(); // internal state struct YMZ280BVoice m_voice[8]; /* the 8 voices */ uint8_t m_current_register; /* currently accessible register */ uint8_t m_status_register; /* current status register */ uint8_t m_irq_state; /* current IRQ state */ uint8_t m_irq_mask; /* current IRQ mask */ uint8_t m_irq_enable; /* current IRQ enable */ uint8_t m_keyon_enable; /* key on enable */ uint8_t m_ext_mem_enable; /* external memory enable */ uint8_t m_ext_readlatch; /* external memory prefetched data */ uint32_t m_ext_mem_address_hi; uint32_t m_ext_mem_address_mid; uint32_t m_ext_mem_address; /* where the CPU can read the ROM */ devcb_write_line m_irq_handler; /* IRQ callback */ double m_master_clock; /* master clock frequency */ sound_stream *m_stream; /* which stream are we using */ std::unique_ptr m_scratch; #if YMZ280B_MAKE_WAVS void *m_wavresample; /* resampled waveform */ #endif }; DECLARE_DEVICE_TYPE(YMZ280B, ymz280b_device) #endif // MAME_SOUND_YMZ280B_H