1 /*************************************************************************/
2 /* audio_driver_dummy.cpp */
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 #include "audio_driver_dummy.h"
32
33 #include "core/os/os.h"
34 #include "core/project_settings.h"
35
init()36 Error AudioDriverDummy::init() {
37
38 active = false;
39 thread_exited = false;
40 exit_thread = false;
41 samples_in = NULL;
42
43 mix_rate = GLOBAL_GET("audio/mix_rate");
44 speaker_mode = SPEAKER_MODE_STEREO;
45 channels = 2;
46
47 int latency = GLOBAL_GET("audio/output_latency");
48 buffer_frames = closest_power_of_2(latency * mix_rate / 1000);
49
50 samples_in = memnew_arr(int32_t, buffer_frames * channels);
51
52 mutex = Mutex::create();
53 thread = Thread::create(AudioDriverDummy::thread_func, this);
54
55 return OK;
56 };
57
thread_func(void * p_udata)58 void AudioDriverDummy::thread_func(void *p_udata) {
59
60 AudioDriverDummy *ad = (AudioDriverDummy *)p_udata;
61
62 uint64_t usdelay = (ad->buffer_frames / float(ad->mix_rate)) * 1000000;
63
64 while (!ad->exit_thread) {
65
66 if (ad->active) {
67
68 ad->lock();
69
70 ad->audio_server_process(ad->buffer_frames, ad->samples_in);
71
72 ad->unlock();
73 };
74
75 OS::get_singleton()->delay_usec(usdelay);
76 };
77
78 ad->thread_exited = true;
79 };
80
start()81 void AudioDriverDummy::start() {
82
83 active = true;
84 };
85
get_mix_rate() const86 int AudioDriverDummy::get_mix_rate() const {
87
88 return mix_rate;
89 };
90
get_speaker_mode() const91 AudioDriver::SpeakerMode AudioDriverDummy::get_speaker_mode() const {
92
93 return speaker_mode;
94 };
95
lock()96 void AudioDriverDummy::lock() {
97
98 if (!thread || !mutex)
99 return;
100 mutex->lock();
101 };
102
unlock()103 void AudioDriverDummy::unlock() {
104
105 if (!thread || !mutex)
106 return;
107 mutex->unlock();
108 };
109
finish()110 void AudioDriverDummy::finish() {
111
112 if (!thread)
113 return;
114
115 exit_thread = true;
116 Thread::wait_to_finish(thread);
117
118 if (samples_in) {
119 memdelete_arr(samples_in);
120 };
121
122 memdelete(thread);
123 if (mutex)
124 memdelete(mutex);
125 thread = NULL;
126 };
127
AudioDriverDummy()128 AudioDriverDummy::AudioDriverDummy() {
129
130 mutex = NULL;
131 thread = NULL;
132 };
133
~AudioDriverDummy()134 AudioDriverDummy::~AudioDriverDummy(){
135
136 };
137