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#pragma once

#ifndef __NAMCO_H__
#define __NAMCO_H__
 
/* 8 voices max */
#define MAX_VOICES 8

#define MAX_VOLUME 16
  
struct namco_interface
{
 	int m_voices;     /* number of voices */
	int m_stereo;     /* set to 1 to indicate stereo (e.g., System 1) */
};
  
/* this structure defines the parameters for a channel */
struct sound_channel
{
 	UINT32 frequency;
 	UINT32 counter;
 	INT32 volume[2];
 	INT32 noise_sw;
 	INT32 noise_state;
 	INT32 noise_seed;
 	UINT32 noise_counter;
 	INT32 noise_hold;
 	INT32 waveform_select;
};
  
class namco_audio_device : public device_t,
 									public device_sound_interface,
 									public namco_interface
{
public:
 	namco_audio_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
 	~namco_audio_device() {}
	
  protected:
  	// device-level overrides
  	virtual void device_config_complete();
  	virtual void device_start();
  
  	// internal state
 	
 	void build_decoded_waveform( UINT8 *rgnbase );
 	void update_namco_waveform(int offset, UINT8 data);
 	UINT32 namco_update_one(stream_sample_t *buffer, int length, const INT16 *wave, UINT32 counter, UINT32 freq);
 	
 	/* data about the sound system */
 	sound_channel m_channel_list[MAX_VOICES];
 	sound_channel *m_last_channel;
 	UINT8 *m_soundregs;
 	UINT8 *m_wavedata;
 
 	/* global sound parameters */
 	int m_wave_size;
 	INT32 m_sound_enable;
 	sound_stream *m_stream;
 	int m_namco_clock;
 	int m_sample_rate;
 	int m_f_fracbits;
 	
	/* decoded waveform table */
 	INT16 *m_waveform[MAX_VOLUME];
 
	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
};
 
class namco_device : public namco_audio_device
{
public:
 	namco_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 	
 	DECLARE_WRITE8_MEMBER( pacman_sound_enable_w );
 	DECLARE_WRITE8_MEMBER( pacman_sound_w );
 
 	void polepos_sound_enable(int enable);
 	
 	DECLARE_READ8_MEMBER( polepos_sound_r );
 	DECLARE_WRITE8_MEMBER( polepos_sound_w );
	
protected:
 	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
};
  
extern const device_type NAMCO;
  
class namco_15xx_device : public namco_audio_device
{
public:
  	namco_15xx_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 	
 	DECLARE_WRITE8_MEMBER( namco_15xx_w );
 	DECLARE_READ8_MEMBER( sharedram_r );
 	DECLARE_WRITE8_MEMBER( sharedram_w );
 	
 	void mappy_sound_enable(int enable);
	
protected:
 	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
};
  
extern const device_type NAMCO_15XX;
  
class namco_cus30_device : public namco_audio_device
{
public:
 	namco_cus30_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 	
 	DECLARE_WRITE8_MEMBER( namcos1_cus30_w );   /* wavedata + sound registers + RAM */
 	DECLARE_READ8_MEMBER( namcos1_cus30_r );
 	DECLARE_WRITE8_MEMBER( namcos1_sound_w );
	
	DECLARE_WRITE8_MEMBER( pacman_sound_w );
	
protected:
 	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
};
  
extern const device_type NAMCO_CUS30;

#endif /* __NAMCO_H__ */