mirror of
https://github.com/holub/mame
synced 2025-04-16 21:44:32 +03:00
05cacea947
* Split YM2154 into a separate device * Created fake YM2154 ROMs as placeholders * Created new BBD sound device in src/devices/sound/bbd.cpp * Created new mixer device in src/devices/sound/mixer.cpp * Connected YM2154 and BBD devices * Approximated BBD driver behavior * Exposed analog sliders as adjusters (accessible via ` menu) * Added sliders to layout and animated them
100 lines
3.1 KiB
C++
100 lines
3.1 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:Aaron Giles
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#ifndef MAME_SOUND_YM2154_H
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#define MAME_SOUND_YM2154_H
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#pragma once
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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DECLARE_DEVICE_TYPE(YM2154, ym2154_device)
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// ======================> ym2154_device
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class ym2154_device : public device_t, public device_sound_interface, public device_memory_interface
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{
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static constexpr uint8_t ADDR_SHIFT = 6;
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public:
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// internal constructor
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ym2154_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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// configuration helpers
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auto irq_handler() { return m_update_irq.bind(); }
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auto io_read_handler() { return m_io_read.bind(); }
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auto io_write_handler() { return m_io_write.bind(); }
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// register reads
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u8 read(offs_t offset);
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// register writes
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void write(offs_t offset, u8 data);
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protected:
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// device-level overrides
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virtual void device_start() override;
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virtual void device_reset() override;
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virtual void device_clock_changed() override;
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virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
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// sound overrides
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virtual void sound_stream_update(sound_stream &stream, std::vector<read_stream_view> const &inputs, std::vector<write_stream_view> &outputs) override;
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// memory space configuration
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virtual space_config_vector memory_space_config() const override;
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private:
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struct channel
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{
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channel() :
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m_pos(0xfffffff), m_start(0), m_end(0), m_panpot(0), m_output_level(0), m_rate(0) { }
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void reset()
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{
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m_pos = 0;
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m_start = m_end = 0;
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m_panpot = 0;
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m_output_level = 0;
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m_rate = 0;
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}
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void start()
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{
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m_pos = m_start << ADDR_SHIFT;
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}
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uint32_t m_pos;
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uint16_t m_start;
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uint16_t m_end;
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uint8_t m_panpot;
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uint8_t m_output_level;
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uint8_t m_rate;
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};
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// internal helpers
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u32 sample_rate() const { return device_t::clock() / 18 / 6; }
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void update_irq_state(u8 state) { if (m_irq_state != state) { m_irq_state = state; m_update_irq(state); } }
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// internal state
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sound_stream *m_stream; // sound stream
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emu_timer *m_timer; // two timers
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uint16_t m_timer_count; // current timer count
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uint8_t m_timer_enable; // timer enable
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uint8_t m_irq_state; // current IRQ state
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uint8_t m_irq_count; // current IRQ count
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uint8_t m_total_level; // master volume
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channel m_channel[12]; // output channels
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devcb_write_line m_update_irq; // IRQ update callback
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devcb_read8 m_io_read; // input port handler
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devcb_write8 m_io_write; // output port handler
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address_space_config const m_group0_config; // address space 0 config
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address_space_config const m_group1_config; // address space 1 config
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optional_memory_region m_group0_region; // group 0 memory region
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optional_memory_region m_group1_region; // group 1 memory region
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};
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#endif // MAME_SOUND_YM2154_H
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