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// license:BSD-3-Clause
// copyright-holders:R. Belmont
/* C140.h */

#pragma once

#ifndef __C140_H__
#define __C140_H__

#define C140_MAX_VOICE 24

enum
{
	C140_TYPE_SYSTEM2,
	C140_TYPE_SYSTEM21,
	C140_TYPE_ASIC219
};

//**************************************************************************
//  INTERFACE CONFIGURATION MACROS
//**************************************************************************

#define MCFG_C140_ADD(_tag, _clock) \
	MCFG_DEVICE_ADD(_tag, C140, _clock)
#define MCFG_C140_REPLACE(_tag, _clock) \
	MCFG_DEVICE_REPLACE(_tag, C140, _clock)

#define MCFG_C140_BANK_TYPE(_type) \
	c140_device::set_bank_type(*device, _type);


//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

struct C140_VOICE
{
	C140_VOICE() :
		ptoffset(0),
		pos(0),
		key(0),
		lastdt(0),
		prevdt(0),
		dltdt(0),
		rvol(0),
		lvol(0),
		frequency(0),
		bank(0),
		mode(0),
		sample_start(0),
		sample_end(0),
		sample_loop(0) {}

	INT32    ptoffset;
	INT32    pos;
	INT32    key;
	//--work
	INT32    lastdt;
	INT32    prevdt;
	INT32    dltdt;
	//--reg
	INT32    rvol;
	INT32    lvol;
	INT32    frequency;
	INT32    bank;
	INT32    mode;

	INT32    sample_start;
	INT32    sample_end;
	INT32    sample_loop;
};


// ======================> c140_device

class c140_device : public device_t,
					public device_sound_interface
{
public:
	c140_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
	~c140_device() { }

	// static configuration
	static void set_bank_type(device_t &device, int bank) { downcast<c140_device &>(device).m_banking_type = bank; }

protected:
	// device-level overrides
	virtual void device_start() override;

	// sound stream update overrides
	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;

public:
	DECLARE_READ8_MEMBER( c140_r );
	DECLARE_WRITE8_MEMBER( c140_w );

public:
	void set_base(void *base);

private:
	void init_voice( C140_VOICE *v );
	long find_sample(long adrs, long bank, int voice);

private:
	int m_sample_rate;
	sound_stream *m_stream;
	int m_banking_type;
	/* internal buffers */
	std::unique_ptr<INT16[]> m_mixer_buffer_left;
	std::unique_ptr<INT16[]> m_mixer_buffer_right;

	int m_baserate;
	optional_region_ptr<INT8> m_rom_ptr;
	INT8 *m_pRom;
	UINT8 m_REG[0x200];

	INT16 m_pcmtbl[8];        //2000.06.26 CAB

	C140_VOICE m_voi[C140_MAX_VOICE];
};

extern const device_type C140;


#endif /* __C140_H__ */