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// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
#ifndef MAME_SOUND_MAS3507D_H
#define MAME_SOUND_MAS3507D_H

#pragma once

#define MINIMP3_ONLY_MP3
#define MINIMP3_NO_STDIO
#include "minimp3/minimp3.h"

class mas3507d_device : public device_t, public device_sound_interface
{
public:
	// construction/destruction
	mas3507d_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);

	auto sample_cb() { return cb_sample.bind(); }

	int i2c_scl_r();
	int i2c_sda_r();
	void i2c_scl_w(bool line);
	void i2c_sda_w(bool line);

	u32 get_frame_count() const { return total_frame_count - buffered_frame_count; }

protected:
	virtual void device_start() override;
	virtual void device_reset() override;
	virtual void sound_stream_update_legacy(sound_stream &stream, stream_sample_t const * const *inputs, stream_sample_t * const *outputs, int samples) override;

private:
	devcb_read16 cb_sample;

	enum { IDLE, STARTED, NAK, ACK, ACK2 } i2c_bus_state;
	enum { UNKNOWN, VALIDATED, WRONG } i2c_bus_address;

	std::array<u8, 0xe00> mp3data;
	std::array<mp3d_sample_t, MINIMP3_MAX_SAMPLES_PER_FRAME> samples;
	bool i2c_scli, i2c_sclo, i2c_sdai, i2c_sdao;
	int i2c_bus_curbit;
	uint8_t i2c_bus_curval;
	int mp3_count, sample_count, current_rate;
	u32 total_frame_count, buffered_frame_count;

	mp3dec_t mp3_dec;
	mp3dec_frame_info_t mp3_info;

	sound_stream *stream;

	void i2c_nak();
	bool i2c_device_got_address(uint8_t address);
	void i2c_device_got_byte(uint8_t byte);
	void i2c_device_got_stop();

	enum { UNDEFINED, CONTROL, DATA_READ, DATA_WRITE, BAD } i2c_subdest;
	enum { CMD_BAD, CMD_RUN, CMD_READ_CTRL, CMD_WRITE_REG, CMD_WRITE_MEM, CMD_READ_REG, CMD_READ_MEM } i2c_command;
	int i2c_bytecount;
	uint32_t i2c_io_bank, i2c_io_adr, i2c_io_count, i2c_io_val;

	void mem_write(int bank, uint32_t adr, uint32_t val);
	void run_program(uint32_t adr);
	void reg_write(uint32_t adr, uint32_t val);

	void fill_buffer();
	void append_buffer(stream_sample_t * const *outputs, int &pos, int samples);
};


// device type definition
DECLARE_DEVICE_TYPE(MAS3507D, mas3507d_device)

#endif // MAME_SOUND_MAS3507D_H