/**********************************************************************

    LMC1992 Digitally-Controlled Stereo Tone and Volume Circuit with 
	Four-Channel Input-Selector emulation

    Copyright MESS Team.
    Visit http://mamedev.org for licensing and usage restrictions.

**********************************************************************
                            _____   _____
                  Data   1 |*    \_/     | 28  V+
                 Clock   2 |             | 27  Bypass
                Enable   3 |             | 26  Right Input 1
          Left Input 1   4 |             | 25  Right Input 2
          Left Input 2   5 |             | 24  Right Input 3
          Left Input 3   6 |             | 23  Right Input 4
          Left Input 4   7 |   LMC1992   | 22  Right Select Out
       Left Select Out   8 |             | 21  Right Select In
        Left Select In   9 |             | 20  Right Tone In
          Left Tone In  10 |             | 19  Right Tone Out
         Left Tone Out  11 |             | 18  Right Op Amp Out
       Left Op Amp Out  12 |             | 17  Right Rear Out
         Left Rear Out  13 |             | 16  Right Front Out
        Left Front Out  14 |_____________| 15  Ground

**********************************************************************/

#pragma once

#ifndef __LMC1992__
#define __LMC1992__

#include "emu.h"



//**************************************************************************
//  MACROS / CONSTANTS
//**************************************************************************

enum
{
	LMC1992_LEFT_INPUT_1 = 0,
	LMC1992_LEFT_INPUT_2,
	LMC1992_LEFT_INPUT_3,
	LMC1992_LEFT_INPUT_4,
	LMC1992_RIGHT_INPUT_1,
	LMC1992_RIGHT_INPUT_2,
	LMC1992_RIGHT_INPUT_3,
	LMC1992_RIGHT_INPUT_4
};



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

#define MCFG_LMC1992_ADD(_tag) \
	MCFG_DEVICE_ADD(_tag, LMC1992, 0)



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

// ======================> lmc1992_device

class lmc1992_device :	public device_t,
						public device_sound_interface
{
public:
    // construction/destruction
    lmc1992_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);

	// inline configuration helpers
	static void static_set_config(device_t &device, int clock2);

	DECLARE_WRITE_LINE_MEMBER( clock_w );
	DECLARE_WRITE_LINE_MEMBER( data_w );
	DECLARE_WRITE_LINE_MEMBER( enable_w );

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

	// internal callbacks
	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);

private:
	inline void execute_command(int addr, int data);

	sound_stream *m_stream[4];
	
	int m_enable;					// enable latch
	int m_data;						// data latch
	int m_clk;						// clock latch
	UINT16 m_si;					// serial in shift register

	int m_input;					// input select
	int m_bass;						// bass
	int m_treble;					// treble
	int m_volume;					// volume
	int m_fader_rf;					// right front fader
	int m_fader_lf;					// left front fader
	int m_fader_rr;					// right rear fader
	int m_fader_lr;					// left rear fader
};


// device type definition
extern const device_type LMC1992;



#endif
