1/**************************************************************************/
2/* audio_driver_alsa.h */
3/**************************************************************************/
4/* This file is part of: */
5/* GODOT ENGINE */
6/* https://godotengine.org */
7/**************************************************************************/
8/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
9/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
10/* */
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12/* a copy of this software and associated documentation files (the */
13/* "Software"), to deal in the Software without restriction, including */
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15/* distribute, sublicense, and/or sell copies of the Software, and to */
16/* permit persons to whom the Software is furnished to do so, subject to */
17/* the following conditions: */
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19/* The above copyright notice and this permission notice shall be */
20/* included in all copies or substantial portions of the Software. */
21/* */
22/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
23/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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28/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
29/**************************************************************************/
30
31#ifndef AUDIO_DRIVER_ALSA_H
32#define AUDIO_DRIVER_ALSA_H
33
34#ifdef ALSA_ENABLED
35
36#include "core/os/mutex.h"
37#include "core/os/thread.h"
38#include "core/templates/safe_refcount.h"
39#include "servers/audio_server.h"
40
41#ifdef SOWRAP_ENABLED
42#include "asound-so_wrap.h"
43#else
44#include <alsa/asoundlib.h>
45#endif
46
47class AudioDriverALSA : public AudioDriver {
48 Thread thread;
49 Mutex mutex;
50
51 snd_pcm_t *pcm_handle = nullptr;
52
53 String output_device_name = "Default";
54 String new_output_device = "Default";
55
56 Vector<int32_t> samples_in;
57 Vector<int16_t> samples_out;
58
59 Error init_output_device();
60 void finish_output_device();
61
62 static void thread_func(void *p_udata);
63
64 unsigned int mix_rate = 0;
65 SpeakerMode speaker_mode;
66
67 snd_pcm_uframes_t buffer_frames;
68 snd_pcm_uframes_t buffer_size;
69 snd_pcm_uframes_t period_size;
70 int channels = 0;
71
72 SafeFlag active;
73 SafeFlag exit_thread;
74
75public:
76 virtual const char *get_name() const override {
77 return "ALSA";
78 }
79
80 virtual Error init() override;
81 virtual void start() override;
82 virtual int get_mix_rate() const override;
83 virtual SpeakerMode get_speaker_mode() const override;
84
85 virtual void lock() override;
86 virtual void unlock() override;
87 virtual void finish() override;
88
89 virtual PackedStringArray get_output_device_list() override;
90 virtual String get_output_device() override;
91 virtual void set_output_device(const String &p_name) override;
92
93 AudioDriverALSA() {}
94 ~AudioDriverALSA() {}
95};
96
97#endif // ALSA_ENABLED
98
99#endif // AUDIO_DRIVER_ALSA_H
100