1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
// license:BSD-3-Clause
// copyright-holders:Jonathan Gevaryahu
#pragma once
#ifndef __SOCR_SND_H__
#define __SOCR_SND_H__
class socrates_snd_device : public device_t,
public device_sound_interface
{
public:
socrates_snd_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
void reg0_w(int data);
void reg1_w(int data);
void reg2_w(int data);
void reg3_w(int data);
void reg4_w(int data);
protected:
// device-level overrides
virtual void device_start();
// sound stream update overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
private:
void snd_clock();
static const UINT8 s_volumeLUT[];
// internal state
sound_stream * m_stream;
UINT8 m_freq[2]; // channel 1,2 frequencies
UINT8 m_vol[2]; // channel 1,2 volume
UINT8 m_enable[2]; // channel 1,2 enable
UINT8 m_channel3; // channel 3 weird register
UINT8 m_state[3]; // output states for channels 1,2,3
UINT8 m_accum[3]; // accumulators for channels 1,2,3
UINT16 m_DAC_output; // output
};
extern const device_type SOCRATES_SOUND;
#endif /* __SOCR_SND_H__ */
|