initial commit, 4.5 stable

drivers/alsa/audio_driver_alsa.h

@@ -0,0 +1,96 @@
+/**************************************************************************/
+/*  audio_driver_alsa.h                                                   */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 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.                 */
+/**************************************************************************/
+
+#pragma once
+
+#ifdef ALSA_ENABLED
+
+#include "core/os/mutex.h"
+#include "core/os/thread.h"
+#include "core/templates/safe_refcount.h"
+#include "servers/audio_server.h"
+
+#ifdef SOWRAP_ENABLED
+#include "asound-so_wrap.h"
+#else
+#include <alsa/asoundlib.h>
+#endif
+
+class AudioDriverALSA : public AudioDriver {
+	Thread thread;
+	Mutex mutex;
+
+	snd_pcm_t *pcm_handle = nullptr;
+
+	String output_device_name = "Default";
+	String new_output_device = "Default";
+
+	Vector<int32_t> samples_in;
+	Vector<int16_t> samples_out;
+
+	Error init_output_device();
+	void finish_output_device();
+
+	static void thread_func(void *p_udata);
+
+	unsigned int mix_rate = 0;
+	SpeakerMode speaker_mode;
+
+	snd_pcm_uframes_t buffer_frames;
+	snd_pcm_uframes_t buffer_size;
+	snd_pcm_uframes_t period_size;
+	int channels = 0;
+
+	SafeFlag active;
+	SafeFlag exit_thread;
+
+public:
+	virtual const char *get_name() const override {
+		return "ALSA";
+	}
+
+	virtual Error init() override;
+	virtual void start() override;
+	virtual int get_mix_rate() const override;
+	virtual SpeakerMode get_speaker_mode() const override;
+
+	virtual void lock() override;
+	virtual void unlock() override;
+	virtual void finish() override;
+
+	virtual PackedStringArray get_output_device_list() override;
+	virtual String get_output_device() override;
+	virtual void set_output_device(const String &p_name) override;
+
+	AudioDriverALSA() {}
+	~AudioDriverALSA() {}
+};
+
+#endif // ALSA_ENABLED