1 /*************************************************************************/ 2 /* audio_driver_alsa.h */ 3 /*************************************************************************/ 4 /* This file is part of: */ 5 /* GODOT ENGINE */ 6 /* https://godotengine.org */ 7 /*************************************************************************/ 8 /* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ 9 /* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */ 10 /* */ 11 /* Permission is hereby granted, free of charge, to any person obtaining */ 12 /* a copy of this software and associated documentation files (the */ 13 /* "Software"), to deal in the Software without restriction, including */ 14 /* without limitation the rights to use, copy, modify, merge, publish, */ 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: */ 18 /* */ 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 */ 24 /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ 25 /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ 26 /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ 27 /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ 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 "servers/audio_server.h" 39 40 #include <alsa/asoundlib.h> 41 42 class AudioDriverALSA : public AudioDriver { 43 44 Thread *thread; 45 Mutex *mutex; 46 47 snd_pcm_t *pcm_handle; 48 49 String device_name; 50 String new_device; 51 52 Vector<int32_t> samples_in; 53 Vector<int16_t> samples_out; 54 55 Error init_device(); 56 void finish_device(); 57 58 static void thread_func(void *p_udata); 59 60 unsigned int mix_rate; 61 SpeakerMode speaker_mode; 62 63 snd_pcm_uframes_t buffer_frames; 64 snd_pcm_uframes_t buffer_size; 65 snd_pcm_uframes_t period_size; 66 int channels; 67 68 bool active; 69 bool thread_exited; 70 mutable bool exit_thread; 71 72 public: get_name()73 const char *get_name() const { 74 return "ALSA"; 75 }; 76 77 virtual Error init(); 78 virtual void start(); 79 virtual int get_mix_rate() const; 80 virtual SpeakerMode get_speaker_mode() const; 81 virtual Array get_device_list(); 82 virtual String get_device(); 83 virtual void set_device(String device); 84 virtual void lock(); 85 virtual void unlock(); 86 virtual void finish(); 87 88 AudioDriverALSA(); 89 ~AudioDriverALSA(); 90 }; 91 92 #endif // ALSA_ENABLED 93 94 #endif // AUDIO_DRIVER_ALSA_H 95