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// license:BSD-3-Clause
// copyright-holders:Nicola Salmoria
#pragma once
#ifndef __SNKWAVE_H__
#define __SNKWAVE_H__
#define SNKWAVE_WAVEFORM_LENGTH 16
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_SNKWAVE_ADD(_tag, _clock) \
MCFG_DEVICE_ADD(_tag, SNKWAVE, _clock)
#define MCFG_SNKWAVE_REPLACE(_tag, _clock) \
MCFG_DEVICE_REPLACE(_tag, SNKWAVE, _clock)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> snkwave_device
class snkwave_device : public device_t,
public device_sound_interface
{
public:
snkwave_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
~snkwave_device() { }
protected:
// device-level overrides
virtual void device_start() override;
// sound stream update overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
public:
DECLARE_WRITE8_MEMBER( snkwave_w );
private:
void update_waveform(unsigned int offset, uint8_t data);
private:
sound_stream *m_stream;
int m_external_clock;
int m_sample_rate;
// data about the sound system
uint32_t m_frequency;
uint32_t m_counter;
int m_waveform_position;
// decoded waveform table
int16_t m_waveform[SNKWAVE_WAVEFORM_LENGTH];
};
extern const device_type SNKWAVE;
#endif /* __SNKWAVE_H__ */
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