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// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/*****************************************************************************
*
* includes/wswan_snd.h
*
****************************************************************************/
#pragma once
#ifndef _WSWAN_SND_H_
#define _WSWAN_SND_H_
#include "emu.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
struct CHAN
{
CHAN() :
freq(0),
period(0),
pos(0),
vol_left(0),
vol_right(0),
on(0),
signal(0) { }
UINT16 freq; /* frequency */
UINT32 period; /* period */
UINT32 pos; /* position */
UINT8 vol_left; /* volume left */
UINT8 vol_right; /* volume right */
UINT8 on; /* on/off */
INT8 signal; /* signal */
};
// ======================> 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 clock);
~wswan_sound_device() { }
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
// sound stream update overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
public:
DECLARE_WRITE8_MEMBER( port_w );
private:
void wswan_ch_set_freq( CHAN *ch, UINT16 freq );
private:
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 m_sweep_step; /* Sweep step */
UINT32 m_sweep_time; /* Sweep time */
UINT32 m_sweep_count; /* Sweep counter */
UINT8 m_noise_type; /* Noise generator type */
UINT8 m_noise_reset; /* Noise reset */
UINT8 m_noise_enable; /* Noise enable */
UINT16 m_sample_address; /* Sample address */
UINT8 m_audio2_voice; /* Audio 2 voice */
UINT8 m_audio3_sweep; /* Audio 3 sweep */
UINT8 m_audio4_noise; /* Audio 4 noise */
UINT8 m_mono; /* mono */
UINT8 m_voice_data; /* voice data */
UINT8 m_output_volume; /* output volume */
UINT8 m_external_stereo; /* external stereo */
UINT8 m_external_speaker; /* external speaker */
UINT16 m_noise_shift; /* Noise counter shift register */
UINT8 m_master_volume; /* Master volume */
};
extern const device_type WSWAN_SND;
#endif
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