1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/*************************************************************************/
/* audio_driver_rtaudio.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "audio_driver_rtaudio.h"
#include "globals.h"
#include "os/os.h"
#ifdef RTAUDIO_ENABLED
const char* AudioDriverRtAudio::get_name() const {
#ifdef OSX_ENABLED
return "RtAudio-OSX";
#elif defined(UNIX_ENABLED)
return "RtAudio-ALSA";
#elif defined(WINDOWS_ENABLED)
return "RtAudio-DirectSound";
#else
return "RtAudio-None";
#endif
}
int AudioDriverRtAudio::callback( void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames, double streamTime, RtAudioStreamStatus status, void *userData ) {
if (status) {
if (status & RTAUDIO_INPUT_OVERFLOW) {
WARN_PRINT("RtAudio input overflow!");
}
if (status & RTAUDIO_OUTPUT_UNDERFLOW) {
WARN_PRINT("RtAudio output underflow!");
}
}
int32_t *buffer = (int32_t *) outputBuffer;
AudioDriverRtAudio *self = (AudioDriverRtAudio*)userData;
if (self->mutex->try_lock()!=OK) {
// what should i do..
for(unsigned int i=0;i<nBufferFrames;i++)
buffer[i]=0;
return 0;
}
self->audio_server_process(nBufferFrames,buffer);
self->mutex->unlock();
return 0;
}
Error AudioDriverRtAudio::init() {
active=false;
mutex=NULL;
dac = memnew( RtAudio );
ERR_EXPLAIN("Cannot initialize RtAudio audio driver: No devices present.")
ERR_FAIL_COND_V( dac->getDeviceCount() < 1, ERR_UNAVAILABLE );
// FIXME: Adapt to the OutputFormat -> SpeakerMode change
/*
String channels = GLOBAL_DEF("audio/output","stereo");
if (channels=="5.1")
output_format=OUTPUT_5_1;
else if (channels=="quad")
output_format=OUTPUT_QUAD;
else if (channels=="mono")
output_format=OUTPUT_MONO;
else
output_format=OUTPUT_STEREO;
*/
RtAudio::StreamParameters parameters;
parameters.deviceId = dac->getDefaultOutputDevice();
RtAudio::StreamOptions options;
// set the desired numberOfBuffers
unsigned int target_number_of_buffers = 4;
options.numberOfBuffers = target_number_of_buffers;
//options.
//RtAudioStreamFlags flags; /*!< A bit-mask of stream flags (RTAUDIO_NONINTERLEAVED, RTAUDIO_MINIMIZE_LATENCY, RTAUDIO_HOG_DEVICE). *///
//unsigned int numberOfBuffers; /*!< Number of stream buffers. */
//std::string streamName; /*!< A stream name (currently used only in Jack). */
//int priority; /*!< Scheduling priority of callback thread (only used with flag RTAUDIO_SCHEDULE_REALTIME). */
parameters.firstChannel = 0;
mix_rate = GLOBAL_DEF("audio/mix_rate",44100);
int latency = GLOBAL_DEF("audio/output_latency",25);
// calculate desired buffer_size, taking the desired numberOfBuffers into account (latency depends on numberOfBuffers*buffer_size)
unsigned int buffer_size = nearest_power_of_2( latency * mix_rate / 1000 / target_number_of_buffers);
if (OS::get_singleton()->is_stdout_verbose()) {
print_line("audio buffer size: "+itos(buffer_size));
}
short int tries = 2;
while(true) {
while( true) {
switch(speaker_mode) {
case SPEAKER_MODE_STEREO: parameters.nChannels = 2; break;
case SPEAKER_SURROUND_51: parameters.nChannels = 6; break;
case SPEAKER_SURROUND_71: parameters.nChannels = 8; break;
};
try {
dac->openStream( ¶meters, NULL, RTAUDIO_SINT32, mix_rate, &buffer_size, &callback, this,&options );
mutex = Mutex::create(true);
active=true;
break;
} catch ( RtAudioError& e ) {
// try with less channels
ERR_PRINT("Unable to open audio, retrying with fewer channels..");
switch(speaker_mode) {
case SPEAKER_MODE_STEREO: speaker_mode=SPEAKER_MODE_STEREO; break;
case SPEAKER_SURROUND_51: speaker_mode=SPEAKER_SURROUND_51; break;
case SPEAKER_SURROUND_71: speaker_mode=SPEAKER_SURROUND_71; break;
};
}
}
// compare actual numberOfBuffers with the desired one. If not equal, close and reopen the stream with adjusted buffer size, so the desired output_latency is still correct
if(target_number_of_buffers != options.numberOfBuffers) {
if(tries <= 0) {
ERR_EXPLAIN("RtAudio: Unable to set correct number of buffers.");
ERR_FAIL_V( ERR_UNAVAILABLE );
break;
}
try {
dac->closeStream();
} catch ( RtAudioError& e ) {
ERR_PRINT(e.what());
ERR_FAIL_V( ERR_UNAVAILABLE );
break;
}
if (OS::get_singleton()->is_stdout_verbose())
print_line("RtAudio: Desired number of buffers (" + itos(target_number_of_buffers) + ") not available. Using " + itos(options.numberOfBuffers) + " instead. Reopening stream with adjusted buffer_size.");
// new buffer size dependent on the ratio between set and actual numberOfBuffers
buffer_size = buffer_size / (options.numberOfBuffers / target_number_of_buffers);
target_number_of_buffers = options.numberOfBuffers;
tries--;
} else {
break;
}
}
return OK;
}
int AudioDriverRtAudio::get_mix_rate() const {
return mix_rate;
}
AudioDriver::SpeakerMode AudioDriverRtAudio::get_speaker_mode() const {
return speaker_mode;
}
void AudioDriverRtAudio::start() {
if (active)
dac->startStream();
}
void AudioDriverRtAudio::lock() {
if (mutex)
mutex->lock();
}
void AudioDriverRtAudio::unlock() {
if (mutex)
mutex->unlock();
}
void AudioDriverRtAudio::finish() {
if ( active && dac->isStreamOpen() )
dac->closeStream();
if (mutex)
memdelete(mutex);
if (dac)
memdelete(dac);
}
AudioDriverRtAudio::AudioDriverRtAudio()
{
mutex=NULL;
mix_rate=44100;
speaker_mode=SPEAKER_MODE_STEREO;
}
#endif
|