// license:BSD-3-Clause // copyright-holders:Aaron Giles /********************************************************************************************** * * DMA-driven DAC driver * by Aaron Giles * **********************************************************************************************/ #ifndef MAME_SOUND_DMADAC_H #define MAME_SOUND_DMADAC_H #pragma once class dmadac_sound_device : public device_t, public device_sound_interface { public: dmadac_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0); void flush(); void transfer(int channel, offs_t channel_spacing, offs_t frame_spacing, offs_t total_frames, int16_t *data); void enable(uint8_t enable); void set_frequency(double frequency); void set_volume(uint16_t volume); protected: // device-level overrides virtual void device_start() 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: // internal state /* sound stream and buffers */ sound_stream * m_channel; std::unique_ptr m_buffer; uint32_t m_bufin; uint32_t m_bufout; /* per-channel parameters */ int16_t m_volume; uint8_t m_enabled; double m_frequency; }; DECLARE_DEVICE_TYPE(DMADAC, dmadac_sound_device) void dmadac_transfer(dmadac_sound_device **devlist, uint8_t num_channels, offs_t channel_spacing, offs_t frame_spacing, offs_t total_frames, int16_t *data); void dmadac_enable(dmadac_sound_device **devlist, uint8_t num_channels, uint8_t enable); void dmadac_set_frequency(dmadac_sound_device **devlist, uint8_t num_channels, double frequency); void dmadac_set_volume(dmadac_sound_device **devlist, uint8_t num_channels, uint16_t volume); #endif // MAME_SOUND_DMADAC_H