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// license:???
// copyright-holders:???
/***************************************************************************
okim6295.h
OKIM 6295 ADCPM sound chip.
***************************************************************************/
#pragma once
#ifndef __OKIM6295_H__
#define __OKIM6295_H__
#include "sound/okiadpcm.h"
//**************************************************************************
// CONSTANTS
//**************************************************************************
enum
{
OKIM6295_PIN7_LOW = 0,
OKIM6295_PIN7_HIGH = 1
};
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_OKIM6295_ADD(_tag, _clock, _pin7) \
MCFG_DEVICE_ADD(_tag, OKIM6295, _clock) \
MCFG_OKIM6295_PIN7(_pin7)
#define MCFG_OKIM6295_REPLACE(_tag, _clock, _pin7) \
MCFG_DEVICE_REPLACE(_tag, OKIM6295, _clock) \
MCFG_OKIM6295_PIN7(_pin7)
#define MCFG_OKIM6295_PIN7(_pin7) \
okim6295_device::static_set_pin7(*device, _pin7);
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> okim6295_device
class okim6295_device : public device_t,
public device_sound_interface,
public device_memory_interface
{
public:
// construction/destruction
okim6295_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// inline configuration helpers
static void static_set_pin7(device_t &device, int pin7);
// runtime configuration
void set_bank_base(offs_t base, bool bDontUpdateStream = false);
void set_pin7(int pin7);
UINT8 read_status();
void write_command(UINT8 command);
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual void device_post_load();
virtual void device_clock_changed();
// device_memory_interface overrides
virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const;
// device_sound_interface overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
// a single voice
class okim_voice
{
public:
okim_voice();
void generate_adpcm(direct_read_data &direct, stream_sample_t *buffer, int samples);
oki_adpcm_state m_adpcm; // current ADPCM state
bool m_playing;
offs_t m_base_offset; // pointer to the base memory location
UINT32 m_sample; // current sample number
UINT32 m_count; // total samples to play
INT8 m_volume; // output volume
};
// configuration state
const address_space_config m_space_config;
// internal state
static const int OKIM6295_VOICES = 4;
okim_voice m_voice[OKIM6295_VOICES];
INT32 m_command;
bool m_bank_installed;
offs_t m_bank_offs;
sound_stream * m_stream;
UINT8 m_pin7_state;
direct_read_data * m_direct;
static const UINT8 s_volume_table[16];
};
// device type definition
extern const device_type OKIM6295;
#endif /* __OKIM6295_H__ */
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