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Diffstat (limited to 'src/emu/sound/amiga.h')
-rw-r--r-- | src/emu/sound/amiga.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/emu/sound/amiga.h b/src/emu/sound/amiga.h new file mode 100644 index 00000000000..56e092b248f --- /dev/null +++ b/src/emu/sound/amiga.h @@ -0,0 +1,63 @@ +/*************************************************************************** + + Amiga audio hardware + +***************************************************************************/ + +#pragma once + +#ifndef __SOUND_AMIGA_H__ +#define __SOUND_AMIGA_H__ + +#include "emu.h" + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> amiga_sound_device + +class amiga_sound_device : public device_t, public device_sound_interface +{ +public: + amiga_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + ~amiga_sound_device() {} + + void update(); + void data_w(int which, UINT16 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: + static const int CLOCK_DIVIDER = 16; + + struct audio_channel + { + emu_timer *irq_timer; + UINT32 curlocation; + UINT16 curlength; + UINT16 curticks; + UINT8 index; + bool dma_enabled; + bool manualmode; + INT8 latched; + }; + + void dma_reload(audio_channel *chan); + + // internal state + audio_channel m_channel[4]; + sound_stream *m_stream; + + TIMER_CALLBACK_MEMBER( signal_irq ); +}; + +extern const device_type AMIGA; + +#endif // __SOUND_AMIGA_H__ |