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// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/*****************************************************************************
*
* includes/wswan.h
*
****************************************************************************/
#ifndef MAME_AUDIO_WSWAN_H
#define MAME_AUDIO_WSWAN_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> wswan_sound_device
class wswan_sound_device : public device_t,
public device_sound_interface
{
public:
wswan_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
DECLARE_WRITE8_MEMBER( port_w );
protected:
struct CHAN
{
CHAN() :
freq(0),
period(0),
pos(0),
vol_left(0),
vol_right(0),
on(0),
signal(0) { }
uint16_t freq; /* frequency */
uint32_t period; /* period */
uint32_t pos; /* position */
uint8_t vol_left; /* volume left */
uint8_t vol_right; /* volume right */
uint8_t on; /* on/off */
int8_t signal; /* signal */
};
// device-level overrides
virtual void device_start() override;
virtual void device_reset() 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 wswan_ch_set_freq( CHAN *ch, uint16_t freq );
sound_stream *m_channel;
CHAN m_audio1; /* Audio channel 1 */
CHAN m_audio2; /* Audio channel 2 */
CHAN m_audio3; /* Audio channel 3 */
CHAN m_audio4; /* Audio channel 4 */
int8_t m_sweep_step; /* Sweep step */
uint32_t m_sweep_time; /* Sweep time */
uint32_t m_sweep_count; /* Sweep counter */
uint8_t m_noise_type; /* Noise generator type */
uint8_t m_noise_reset; /* Noise reset */
uint8_t m_noise_enable; /* Noise enable */
uint16_t m_sample_address; /* Sample address */
uint8_t m_audio2_voice; /* Audio 2 voice */
uint8_t m_audio3_sweep; /* Audio 3 sweep */
uint8_t m_audio4_noise; /* Audio 4 noise */
uint8_t m_mono; /* mono */
uint8_t m_voice_data; /* voice data */
uint8_t m_output_volume; /* output volume */
uint8_t m_external_stereo; /* external stereo */
uint8_t m_external_speaker; /* external speaker */
uint16_t m_noise_shift; /* Noise counter shift register */
uint8_t m_master_volume; /* Master volume */
};
DECLARE_DEVICE_TYPE(WSWAN_SND, wswan_sound_device)
#endif // MAME_AUDIO_WSWAN_H
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