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// license:BSD-3-Clause
// copyright-holders:Allard van der Bas
/* 8 voices max */
#define MAX_VOICES 8
/* this structure defines the parameters for a channel */
struct wp_sound_channel
{
int frequency;
int counter;
int volume;
const UINT8 *wave;
int oneshot;
int oneshotplaying;
};
class wiping_sound_device : public device_t,
public device_sound_interface
{
public:
wiping_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~wiping_sound_device() {}
DECLARE_WRITE8_MEMBER( sound_w );
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;
private:
// internal state
/* data about the sound system */
wp_sound_channel m_channel_list[MAX_VOICES];
wp_sound_channel *m_last_channel;
/* global sound parameters */
const UINT8 *m_sound_prom;
const UINT8 *m_sound_rom;
int m_num_voices;
int m_sound_enable;
sound_stream *m_stream;
/* mixer tables and internal buffers */
INT16 *m_mixer_table;
INT16 *m_mixer_lookup;
short *m_mixer_buffer;
short *m_mixer_buffer_2;
UINT8 m_soundregs[0x4000];
void make_mixer_table(int voices, int gain);
};
extern const device_type WIPING;
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