/*************************************************************************/
/*  audio_driver_wasapi.h                                                */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
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/*************************************************************************/
#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 {

	HANDLE event;
	IAudioClient *audio_client;
	IAudioRenderClient *render_client;
	Mutex *mutex;
	Thread *thread;

	WORD format_tag;
	WORD bits_per_sample;

	Vector<int32_t> samples_in;

	unsigned int buffer_size;
	unsigned int channels;
	unsigned int wasapi_channels;
	int mix_rate;
	int buffer_frames;

	bool thread_exited;
	mutable bool exit_thread;
	bool active;

	_FORCE_INLINE_ void write_sample(AudioDriverWASAPI *ad, BYTE *buffer, int i, int32_t sample);
	static void thread_func(void *p_udata);

	Error init_device(bool reinit = false);
	Error finish_device();
	Error reopen();

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 void lock();
	virtual void unlock();
	virtual void finish();

	AudioDriverWASAPI();
};

#endif // AUDIO_DRIVER_WASAPI_H
#endif