8f54445625
buggy, slow and glitchy output is good but chan osc is now broken from 1.5 to 0.4 seconds
91 lines
1.8 KiB
C++
91 lines
1.8 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:Acho A. Tang,R. Belmont
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/*********************************************************
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Irem GA20 PCM Sound Chip
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DISCLAIMER
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- This file is modified for suitable in furnace.
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- modified by cam900 and tildearrow
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*********************************************************/
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#ifndef MAME_SOUND_IREMGA20_H
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#define MAME_SOUND_IREMGA20_H
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#pragma once
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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using u8 = unsigned char;
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using u32 = unsigned int;
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using s32 = signed int;
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class iremga20_intf
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{
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public:
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virtual u8 read_byte(u32 address) { return 0; };
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};
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// ======================> iremga20_device
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class iremga20_device
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{
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public:
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iremga20_device(iremga20_intf &intf);
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void write(u32 offset, u8 data);
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u8 read(u32 offset);
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inline void set_mute(const int ch, const bool mute) { m_channel[ch & 3].mute = mute; m_channel[ch & 3].hot = true; }
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inline unsigned int get_position(const int ch) {
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return m_channel[ch&3].pos;
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}
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inline bool is_playing(const int ch) {
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return m_channel[ch&3].play;
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}
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// device-level overrides
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void device_reset();
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// sound stream update overrides
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void sound_stream_update(short* outputs, int len);
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struct channel_def
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{
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channel_def() :
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sample(0),
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rate(0),
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pos(0),
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counter(0),
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end(0),
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volume(0),
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output(0),
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play(0),
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mute(false),
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hot(false)
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{
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}
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int sample;
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u32 rate;
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u32 pos;
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u32 counter;
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u32 end;
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u32 volume;
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int output;
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bool play;
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bool mute;
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bool hot;
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};
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u8 m_regs[0x20];
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channel_def m_channel[4];
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iremga20_intf &m_intf;
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};
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#endif // MAME_SOUND_IREMGA20_H
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