1 /*************************************************************************/
2 /* audio_driver_winrt.cpp */
3 /*************************************************************************/
4 /* This file is part of: */
5 /* GODOT ENGINE */
6 /* https://godotengine.org */
7 /*************************************************************************/
8 /* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
9 /* */
10 /* Permission is hereby granted, free of charge, to any person obtaining */
11 /* a copy of this software and associated documentation files (the */
12 /* "Software"), to deal in the Software without restriction, including */
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14 /* distribute, sublicense, and/or sell copies of the Software, and to */
15 /* permit persons to whom the Software is furnished to do so, subject to */
16 /* the following conditions: */
17 /* */
18 /* The above copyright notice and this permission notice shall be */
19 /* included in all copies or substantial portions of the Software. */
20 /* */
21 /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
22 /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
23 /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
24 /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
25 /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
26 /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
27 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
28 /*************************************************************************/
29 #include "audio_driver_winrt.h"
30
31 #include "globals.h"
32 #include "os/os.h"
33
34 using namespace Windows::Media;
35 using namespace Windows::Media::Core;
36 using namespace Windows::Media::MediaProperties;
37 using namespace Windows::Media::Editing;
38 using namespace Windows::Foundation;
39
get_name() const40 const char *AudioDriverWinRT::get_name() const {
41 return "WinRT";
42 }
43
init()44 Error AudioDriverWinRT::init() {
45
46 active = false;
47 thread_exited = false;
48 exit_thread = false;
49 pcm_open = false;
50 samples_in = NULL;
51
52 mix_rate = 48000;
53 output_format = OUTPUT_STEREO;
54 channels = 2;
55
56 int latency = GLOBAL_DEF("audio/output_latency", 25);
57 buffer_size = closest_power_of_2(latency * mix_rate / 1000);
58
59 samples_in = memnew_arr(int32_t, buffer_size * channels);
60 for (int i = 0; i < AUDIO_BUFFERS; i++) {
61 samples_out[i] = memnew_arr(int16_t, buffer_size * channels);
62 xaudio_buffer[i].AudioBytes = buffer_size * channels * sizeof(int16_t);
63 xaudio_buffer[i].pAudioData = (const BYTE *)(samples_out[i]);
64 xaudio_buffer[i].Flags = 0;
65 }
66
67 HRESULT hr;
68 hr = XAudio2Create(&xaudio, 0, XAUDIO2_DEFAULT_PROCESSOR);
69 if (hr != S_OK) {
70 ERR_EXPLAIN("Error creating XAudio2 engine.");
71 ERR_FAIL_V(ERR_UNAVAILABLE);
72 }
73 hr = xaudio->CreateMasteringVoice(&mastering_voice);
74 if (hr != S_OK) {
75 ERR_EXPLAIN("Error creating XAudio2 mastering voice.");
76 ERR_FAIL_V(ERR_UNAVAILABLE);
77 }
78
79 wave_format.nChannels = channels;
80 wave_format.cbSize = 0;
81 wave_format.nSamplesPerSec = mix_rate;
82 wave_format.wFormatTag = WAVE_FORMAT_PCM;
83 wave_format.wBitsPerSample = 16;
84 wave_format.nBlockAlign = channels * wave_format.wBitsPerSample >> 3;
85 wave_format.nAvgBytesPerSec = mix_rate * wave_format.nBlockAlign;
86
87 voice_callback = memnew(XAudio2DriverVoiceCallback);
88
89 hr = xaudio->CreateSourceVoice(&source_voice, &wave_format, 0, XAUDIO2_MAX_FREQ_RATIO, voice_callback);
90 if (hr != S_OK) {
91 ERR_EXPLAIN("Error creating XAudio2 source voice. " + itos(hr));
92 ERR_FAIL_V(ERR_UNAVAILABLE);
93 }
94
95 mutex = Mutex::create();
96 thread = Thread::create(AudioDriverWinRT::thread_func, this);
97
98 return OK;
99 };
100
thread_func(void * p_udata)101 void AudioDriverWinRT::thread_func(void *p_udata) {
102
103 AudioDriverWinRT *ad = (AudioDriverWinRT *)p_udata;
104
105 uint64_t usdelay = (ad->buffer_size / float(ad->mix_rate)) * 1000000;
106
107 while (!ad->exit_thread) {
108
109 if (!ad->active) {
110
111 for (int i = 0; i < AUDIO_BUFFERS; i++) {
112 ad->xaudio_buffer[i].Flags = XAUDIO2_END_OF_STREAM;
113 }
114
115 } else {
116
117 ad->lock();
118
119 ad->audio_server_process(ad->buffer_size, ad->samples_in);
120
121 ad->unlock();
122
123 for (unsigned int i = 0; i < ad->buffer_size * ad->channels; i++) {
124
125 ad->samples_out[ad->current_buffer][i] = ad->samples_in[i] >> 16;
126 }
127
128 ad->xaudio_buffer[ad->current_buffer].Flags = 0;
129 ad->xaudio_buffer[ad->current_buffer].AudioBytes = ad->buffer_size * ad->channels * sizeof(int16_t);
130 ad->xaudio_buffer[ad->current_buffer].pAudioData = (const BYTE *)(ad->samples_out[ad->current_buffer]);
131 ad->xaudio_buffer[ad->current_buffer].PlayBegin = 0;
132 ad->source_voice->SubmitSourceBuffer(&(ad->xaudio_buffer[ad->current_buffer]));
133
134 ad->current_buffer = (ad->current_buffer + 1) % AUDIO_BUFFERS;
135
136 XAUDIO2_VOICE_STATE state;
137 while (ad->source_voice->GetState(&state), state.BuffersQueued > AUDIO_BUFFERS - 1) {
138 WaitForSingleObject(ad->voice_callback->buffer_end_event, INFINITE);
139 }
140 }
141 };
142
143 ad->thread_exited = true;
144 };
145
start()146 void AudioDriverWinRT::start() {
147
148 active = true;
149 HRESULT hr = source_voice->Start(0);
150 if (hr != S_OK) {
151 ERR_EXPLAIN("XAudio2 start error " + itos(hr));
152 ERR_FAIL();
153 }
154 };
155
get_mix_rate() const156 int AudioDriverWinRT::get_mix_rate() const {
157
158 return mix_rate;
159 };
160
get_output_format() const161 AudioDriverSW::OutputFormat AudioDriverWinRT::get_output_format() const {
162
163 return output_format;
164 };
165
get_latency()166 float AudioDriverWinRT::get_latency() {
167
168 XAUDIO2_PERFORMANCE_DATA perf_data;
169 xaudio->GetPerformanceData(&perf_data);
170 if (perf_data.CurrentLatencyInSamples) {
171 return (float)(perf_data.CurrentLatencyInSamples / ((float)mix_rate));
172 } else {
173 return 0;
174 }
175 }
176
lock()177 void AudioDriverWinRT::lock() {
178
179 if (!thread || !mutex)
180 return;
181 mutex->lock();
182 };
unlock()183 void AudioDriverWinRT::unlock() {
184
185 if (!thread || !mutex)
186 return;
187 mutex->unlock();
188 };
189
finish()190 void AudioDriverWinRT::finish() {
191
192 if (!thread)
193 return;
194
195 exit_thread = true;
196 Thread::wait_to_finish(thread);
197
198 if (source_voice) {
199 source_voice->Stop(0);
200 memdelete(source_voice);
201 }
202
203 if (samples_in) {
204 memdelete_arr(samples_in);
205 };
206 if (samples_out[0]) {
207 for (int i = 0; i < AUDIO_BUFFERS; i++) {
208 memdelete_arr(samples_out[i]);
209 }
210 };
211
212 memdelete(voice_callback);
213 memdelete(mastering_voice);
214
215 memdelete(thread);
216 if (mutex)
217 memdelete(mutex);
218 thread = NULL;
219 };
220
AudioDriverWinRT()221 AudioDriverWinRT::AudioDriverWinRT() {
222
223 mutex = NULL;
224 thread = NULL;
225 wave_format = { 0 };
226 for (int i = 0; i < AUDIO_BUFFERS; i++) {
227 xaudio_buffer[i] = { 0 };
228 samples_out[i] = 0;
229 }
230 current_buffer = 0;
231 };
232
~AudioDriverWinRT()233 AudioDriverWinRT::~AudioDriverWinRT(){
234
235 };
236