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-rw-r--r--src/mame/audio/lynx.h90
1 files changed, 90 insertions, 0 deletions
diff --git a/src/mame/audio/lynx.h b/src/mame/audio/lynx.h
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+++ b/src/mame/audio/lynx.h
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+// license:GPL-2.0+
+// copyright-holders:Peter Trauner
+
+#ifndef __LYNXSOUND_H__
+#define __LYNXSOUND_H__
+
+struct LYNX_AUDIO {
+ struct {
+ INT8 volume;
+ UINT8 feedback;
+ INT8 output;
+ UINT8 shifter;
+ UINT8 bakup;
+ UINT8 control1;
+ UINT8 counter;
+ UINT8 control2;
+ } reg;
+ UINT8 attenuation;
+ UINT16 mask; // 12-bit
+ UINT16 shifter; // 12-bit
+ float ticks;
+ int count;
+};
+
+typedef device_delegate<void (void)> lynx_sound_timer_delegate;
+
+
+class lynx_sound_device : public device_t,
+ public device_sound_interface
+{
+public:
+ lynx_sound_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
+ lynx_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ DECLARE_READ8_MEMBER(read);
+ DECLARE_WRITE8_MEMBER(write);
+ void count_down(int nr);
+ static void set_timer_delegate(device_t &device, lynx_sound_timer_delegate cb);
+
+protected:
+ // device-level overrides
+ virtual void device_config_complete();
+ 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);
+
+ void reset_channel(LYNX_AUDIO *channel);
+ void shift(int chan_nr);
+ void execute(int chan_nr);
+ void init();
+ void register_save();
+
+ sound_stream *m_mixer_channel;
+ lynx_sound_timer_delegate m_timer_delegate; // this calls lynx_timer_count_down from the driver state
+
+ float m_usec_per_sample;
+ int *m_shift_mask;
+ int *m_shift_xor;
+ UINT8 m_attenuation_enable;
+ UINT8 m_master_enable;
+ LYNX_AUDIO m_audio[4];
+};
+
+
+class lynx2_sound_device : public lynx_sound_device
+{
+public:
+ lynx2_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+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);
+};
+
+
+extern const device_type LYNX_SND;
+extern const device_type LYNX2_SND;
+
+
+#define MCFG_LYNX_SND_SET_TIMER( _class, _method) \
+ lynx_sound_device::set_timer_delegate(*device, lynx_sound_timer_delegate(&_class::_method, #_class "::" #_method, NULL, (_class *)0));
+
+
+#endif