summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/sound/k051649.h
blob: f69ae00b70776f775820bc8c7a1a4a9e02f7fee7 (plain) (blame)
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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
// license:BSD-3-Clause
// copyright-holders:Bryan McPhail
#ifndef MAME_SOUND_K051649_H
#define MAME_SOUND_K051649_H

#pragma once


//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

// ======================> k051649_device

class k051649_device : public device_t,
						public device_sound_interface
{
public:
	k051649_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);

	void k051649_waveform_w(offs_t offset, u8 data);
	u8   k051649_waveform_r(offs_t offset);
	void k051649_volume_w(offs_t offset, u8 data);
	void k051649_frequency_w(offs_t offset, u8 data);
	void k051649_keyonoff_w(u8 data);
	void k051649_test_w(u8 data);
	u8   k051649_test_r();

	void k052539_waveform_w(offs_t offset, u8 data);
	u8   k052539_waveform_r(offs_t offset);

	void scc_map(address_map &map);
protected:
	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;
	virtual void device_post_load() override;
	virtual void device_clock_changed() 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:
	// Parameters for a channel
	struct sound_channel
	{
		sound_channel() :
			counter(0),
			clock(0),
			frequency(0),
			volume(0),
			key(false)
		{
			std::fill(std::begin(waveram), std::end(waveram), 0);
		}

		u8 counter;     // address counter for wavetable
		u32 clock;      // internal clock
		u16 frequency;  // frequency; result: (input clock / (32 * (frequency + 1)))
		int volume;     // volume
		bool key;       // keyon/off
		s8 waveram[32]; // 32 byte wavetable
	};

	void make_mixer_table(int voices);

	sound_channel m_channel_list[5];

	/* global sound parameters */
	sound_stream *m_stream;
	int m_rate;

	/* mixer tables and internal buffers */
	std::unique_ptr<s16[]> m_mixer_table;
	s16 *m_mixer_lookup;
	std::vector<s16> m_mixer_buffer;

	/* chip registers */
	u8 m_test;
};

DECLARE_DEVICE_TYPE(K051649, k051649_device)

#endif // MAME_SOUND_K051649_H