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// license:BSD-3-Clause
// copyright-holders:Barry Rodewald
#ifndef MAME_SOUND_OKIM6258_H
#define MAME_SOUND_OKIM6258_H
#pragma once
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_OKIM6258_ADD(tag, clock) \
MCFG_DEVICE_ADD((tag), OKIM6258, (clock))
#define MCFG_OKIM6258_REPLACE(tag, clock) \
MCFG_DEVICE_REPLACE((tag), OKIM6258, (clock))
#define MCFG_OKIM6258_DIVIDER(div) \
downcast<okim6258_device &>(*device).set_start_div((okim6258_device::div));
#define MCFG_OKIM6258_ADPCM_TYPE(type) \
downcast<okim6258_device &>(*device).set_type((okim6258_device::type));
#define MCFG_OKIM6258_OUT_BITS(bits) \
downcast<okim6258_device &>(*device).set_outbits((okim6258_device::bits));
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> okim6258_device
class okim6258_device : public device_t,
public device_sound_interface
{
public:
static constexpr int FOSC_DIV_BY_1024 = 0;
static constexpr int FOSC_DIV_BY_768 = 1;
static constexpr int FOSC_DIV_BY_512 = 2;
static constexpr int TYPE_3BITS = 0;
static constexpr int TYPE_4BITS = 1;
static constexpr int OUTPUT_10BITS = 10;
static constexpr int OUTPUT_12BITS = 12;
okim6258_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// configuration
void set_start_div(int div) { m_start_divider = div; }
void set_type(int type) { m_adpcm_type = type; }
void set_outbits(int outbit) { m_output_bits = outbit; }
DECLARE_READ8_MEMBER( status_r );
DECLARE_WRITE8_MEMBER( data_w );
DECLARE_WRITE8_MEMBER( ctrl_w );
void set_divider(int val);
int get_vclk();
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_clock_changed() override;
// sound stream update overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
private:
void state_save_register();
int16_t clock_adpcm(uint8_t nibble);
uint8_t m_status;
uint32_t m_start_divider;
uint32_t m_divider; /* master clock divider */
uint8_t m_adpcm_type; /* 3/4 bit ADPCM select */
uint8_t m_data_in; /* ADPCM data-in register */
uint8_t m_nibble_shift; /* nibble select */
sound_stream *m_stream; /* which stream are we playing on? */
uint8_t m_output_bits; /* D/A precision is 10-bits but 12-bit data can be
output serially to an external DAC */
int32_t m_signal;
int32_t m_step;
};
DECLARE_DEVICE_TYPE(OKIM6258, okim6258_device)
#endif // MAME_SOUND_OKIM6258_H
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