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

    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__ */