pandemonium_engine/drivers/alsa/audio_driver_alsa.h

#ifndef AUDIO_DRIVER_ALSA_H
#define AUDIO_DRIVER_ALSA_H

/*************************************************************************/
/*  audio_driver_alsa.h                                                  */
/*************************************************************************/
/*                         This file is part of:                         */
/*                          PANDEMONIUM ENGINE                           */
/*             https://github.com/Relintai/pandemonium_engine            */
/*************************************************************************/
/* Copyright (c) 2022-present Péter Magyar.                              */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* 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.                */
/*************************************************************************/

#ifdef ALSA_ENABLED

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

#include "asound-so_wrap.h"

class AudioDriverALSA : public AudioDriver {
	Thread thread;
	Mutex mutex;

	snd_pcm_t *pcm_handle;

	String device_name;
	String new_device;

	Vector<int32_t> samples_in;
	Vector<int16_t> samples_out;

	Error init_device();
	void finish_device();

	static void thread_func(void *p_udata);

	unsigned int mix_rate;
	SpeakerMode speaker_mode;

	snd_pcm_uframes_t buffer_frames;
	snd_pcm_uframes_t buffer_size;
	snd_pcm_uframes_t period_size;
	int channels;

	SafeFlag active;
	SafeFlag exit_thread;

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

	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();

	AudioDriverALSA();
	~AudioDriverALSA();
};

#endif // ALSA_ENABLED

#endif // AUDIO_DRIVER_ALSA_H