godot/drivers/wasapi/audio_driver_wasapi.h

/*************************************************************************/
/*  audio_driver_wasapi.h                                                */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#ifndef AUDIO_DRIVER_WASAPI_H
#define AUDIO_DRIVER_WASAPI_H

#ifdef WASAPI_ENABLED

#include "core/os/mutex.h"
#include "core/os/thread.h"
#include "servers/audio_server.h"

#include <audioclient.h>
#include <mmdeviceapi.h>
#include <windows.h>

class AudioDriverWASAPI : public AudioDriver {
	class AudioDeviceWASAPI {
	public:
		IAudioClient *audio_client = nullptr;
		IAudioRenderClient *render_client = nullptr;
		IAudioCaptureClient *capture_client = nullptr;
		bool active = false;

		WORD format_tag = 0;
		WORD bits_per_sample = 0;
		unsigned int channels = 0;
		unsigned int frame_size = 0;

		String device_name = "Default";
		String new_device = "Default";

		AudioDeviceWASAPI() {}
	};

	AudioDeviceWASAPI audio_input;
	AudioDeviceWASAPI audio_output;

	Mutex mutex;
	Thread thread;

	Vector<int32_t> samples_in;

	unsigned int channels = 0;
	int mix_rate = 0;
	int buffer_frames = 0;

	bool thread_exited = false;
	mutable bool exit_thread = false;

	static _FORCE_INLINE_ void write_sample(WORD format_tag, int bits_per_sample, BYTE *buffer, int i, int32_t sample);
	static _FORCE_INLINE_ int32_t read_sample(WORD format_tag, int bits_per_sample, BYTE *buffer, int i);
	static void thread_func(void *p_udata);

	Error init_render_device(bool reinit = false);
	Error init_capture_device(bool reinit = false);

	Error finish_render_device();
	Error finish_capture_device();

	Error audio_device_init(AudioDeviceWASAPI *p_device, bool p_capture, bool reinit);
	Error audio_device_finish(AudioDeviceWASAPI *p_device);
	Array audio_device_get_list(bool p_capture);

public:
	virtual const char *get_name() const {
		return "WASAPI";
	}

	virtual Error init();
	virtual void start();
	virtual int get_mix_rate() const;
	virtual SpeakerMode get_speaker_mode() const;
	virtual Array get_device_list();
	virtual String get_device();
	virtual void set_device(String device);
	virtual void lock();
	virtual void unlock();
	virtual void finish();

	virtual Error capture_start();
	virtual Error capture_stop();
	virtual Array capture_get_device_list();
	virtual void capture_set_device(const String &p_name);
	virtual String capture_get_device();

	AudioDriverWASAPI();
};

#endif // AUDIO_DRIVER_WASAPI_H
#endif