// license:BSD-3-Clause // copyright-holders:Kevin Thacker /********************************************************************** Simple beeper sound driver **********************************************************************/ #ifndef MAME_SOUND_BEEP_H #define MAME_SOUND_BEEP_H #pragma once //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class beep_device : public device_t, public device_sound_interface { public: beep_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); void set_state(int state); // enable/disable sound output void set_clock(uint32_t frequency); // output frequency protected: // device-level overrides virtual void device_start() override ATTR_COLD; // sound stream update overrides virtual void sound_stream_update(sound_stream &stream) override; private: sound_stream *m_stream; // stream number bool m_enable; // enable beep uint32_t m_frequency; // set frequency - this can be changed using the appropriate function int32_t m_incr; // initial wave state sound_stream::sample_t m_signal; // current signal }; DECLARE_DEVICE_TYPE(BEEP, beep_device) #endif // MAME_SOUND_BEEP_H