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2 /*  audio_driver_alsa.h                                                  */
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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