1 /*************************************************************************/
2 /* audio_server_javascript.cpp */
3 /*************************************************************************/
4 /* This file is part of: */
5 /* GODOT ENGINE */
6 /* https://godotengine.org */
7 /*************************************************************************/
8 /* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
9 /* Copyright (c) 2014-2019 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 #include "audio_server_javascript.h"
31
32 #include "emscripten.h"
33
get_mixer()34 AudioMixer *AudioServerJavascript::get_mixer() {
35
36 return NULL;
37 }
38
audio_mixer_chunk_callback(int p_frames)39 void AudioServerJavascript::audio_mixer_chunk_callback(int p_frames) {
40 }
41
sample_create(SampleFormat p_format,bool p_stereo,int p_length)42 RID AudioServerJavascript::sample_create(SampleFormat p_format, bool p_stereo, int p_length) {
43
44 Sample *sample = memnew(Sample);
45 sample->format = p_format;
46 sample->stereo = p_stereo;
47 sample->length = p_length;
48 sample->loop_begin = 0;
49 sample->loop_end = p_length;
50 sample->loop_format = SAMPLE_LOOP_NONE;
51 sample->mix_rate = 44100;
52 sample->index = -1;
53
54 return sample_owner.make_rid(sample);
55 }
56
sample_set_description(RID p_sample,const String & p_description)57 void AudioServerJavascript::sample_set_description(RID p_sample, const String &p_description) {
58 }
sample_get_description(RID p_sample) const59 String AudioServerJavascript::sample_get_description(RID p_sample) const {
60
61 return String();
62 }
63
sample_get_format(RID p_sample) const64 AudioServerJavascript::SampleFormat AudioServerJavascript::sample_get_format(RID p_sample) const {
65
66 return SAMPLE_FORMAT_PCM8;
67 }
sample_is_stereo(RID p_sample) const68 bool AudioServerJavascript::sample_is_stereo(RID p_sample) const {
69
70 const Sample *sample = sample_owner.get(p_sample);
71 ERR_FAIL_COND_V(!sample, false);
72 return sample->stereo;
73 }
sample_get_length(RID p_sample) const74 int AudioServerJavascript::sample_get_length(RID p_sample) const {
75 const Sample *sample = sample_owner.get(p_sample);
76 ERR_FAIL_COND_V(!sample, 0);
77 return sample->length;
78 }
sample_get_data_ptr(RID p_sample) const79 const void *AudioServerJavascript::sample_get_data_ptr(RID p_sample) const {
80
81 return NULL;
82 }
83
sample_set_data(RID p_sample,const DVector<uint8_t> & p_buffer)84 void AudioServerJavascript::sample_set_data(RID p_sample, const DVector<uint8_t> &p_buffer) {
85
86 Sample *sample = sample_owner.get(p_sample);
87 ERR_FAIL_COND(!sample);
88 int chans = sample->stereo ? 2 : 1;
89
90 Vector<float> buffer;
91 buffer.resize(sample->length * chans);
92 DVector<uint8_t>::Read r = p_buffer.read();
93 if (sample->format == SAMPLE_FORMAT_PCM8) {
94 const int8_t *ptr = (const int8_t *)r.ptr();
95 for (int i = 0; i < sample->length * chans; i++) {
96 buffer[i] = ptr[i] / 128.0;
97 }
98 } else if (sample->format == SAMPLE_FORMAT_PCM16) {
99 const int16_t *ptr = (const int16_t *)r.ptr();
100 for (int i = 0; i < sample->length * chans; i++) {
101 buffer[i] = ptr[i] / 32768.0;
102 }
103 } else {
104 ERR_EXPLAIN("Unsupported for now");
105 ERR_FAIL();
106 }
107
108 sample->tmp_data = buffer;
109 }
sample_get_data(RID p_sample) const110 DVector<uint8_t> AudioServerJavascript::sample_get_data(RID p_sample) const {
111
112 return DVector<uint8_t>();
113 }
114
sample_set_mix_rate(RID p_sample,int p_rate)115 void AudioServerJavascript::sample_set_mix_rate(RID p_sample, int p_rate) {
116 Sample *sample = sample_owner.get(p_sample);
117 ERR_FAIL_COND(!sample);
118 sample->mix_rate = p_rate;
119 }
120
sample_get_mix_rate(RID p_sample) const121 int AudioServerJavascript::sample_get_mix_rate(RID p_sample) const {
122 const Sample *sample = sample_owner.get(p_sample);
123 ERR_FAIL_COND_V(!sample, 0);
124 return sample->mix_rate;
125 }
126
sample_set_loop_format(RID p_sample,SampleLoopFormat p_format)127 void AudioServerJavascript::sample_set_loop_format(RID p_sample, SampleLoopFormat p_format) {
128
129 Sample *sample = sample_owner.get(p_sample);
130 ERR_FAIL_COND(!sample);
131 sample->loop_format = p_format;
132 }
133
sample_get_loop_format(RID p_sample) const134 AudioServerJavascript::SampleLoopFormat AudioServerJavascript::sample_get_loop_format(RID p_sample) const {
135
136 const Sample *sample = sample_owner.get(p_sample);
137 ERR_FAIL_COND_V(!sample, SAMPLE_LOOP_NONE);
138 return sample->loop_format;
139 }
140
sample_set_loop_begin(RID p_sample,int p_pos)141 void AudioServerJavascript::sample_set_loop_begin(RID p_sample, int p_pos) {
142
143 Sample *sample = sample_owner.get(p_sample);
144 ERR_FAIL_COND(!sample);
145 sample->loop_begin = p_pos;
146 }
sample_get_loop_begin(RID p_sample) const147 int AudioServerJavascript::sample_get_loop_begin(RID p_sample) const {
148
149 const Sample *sample = sample_owner.get(p_sample);
150 ERR_FAIL_COND_V(!sample, 0);
151 return sample->loop_begin;
152 }
153
sample_set_loop_end(RID p_sample,int p_pos)154 void AudioServerJavascript::sample_set_loop_end(RID p_sample, int p_pos) {
155
156 Sample *sample = sample_owner.get(p_sample);
157 ERR_FAIL_COND(!sample);
158 sample->loop_end = p_pos;
159 }
sample_get_loop_end(RID p_sample) const160 int AudioServerJavascript::sample_get_loop_end(RID p_sample) const {
161
162 const Sample *sample = sample_owner.get(p_sample);
163 ERR_FAIL_COND_V(!sample, 0);
164 return sample->loop_end;
165 }
166
167 /* VOICE API */
168
voice_create()169 RID AudioServerJavascript::voice_create() {
170
171 Voice *voice = memnew(Voice);
172
173 voice->index = voice_base;
174 voice->volume = 1.0;
175 voice->pan = 0.0;
176 voice->pan_depth = .0;
177 voice->pan_height = 0.0;
178 voice->chorus = 0;
179 voice->reverb_type = REVERB_SMALL;
180 voice->reverb = 0;
181 voice->mix_rate = -1;
182 voice->positional = false;
183 voice->active = false;
184
185 /* clang-format off */
186 EM_ASM_( {
187 _as_voices[$0] = null;
188 _as_voice_gain[$0] = _as_audioctx.createGain();
189 _as_voice_pan[$0] = _as_audioctx.createStereoPanner();
190 _as_voice_gain[$0].connect(_as_voice_pan[$0]);
191 _as_voice_pan[$0].connect(_as_audioctx.destination);
192 }, voice_base);
193 /* clang-format on */
194
195 voice_base++;
196
197 return voice_owner.make_rid(voice);
198 }
199
voice_play(RID p_voice,RID p_sample)200 void AudioServerJavascript::voice_play(RID p_voice, RID p_sample) {
201
202 Voice *voice = voice_owner.get(p_voice);
203 ERR_FAIL_COND(!voice);
204 Sample *sample = sample_owner.get(p_sample);
205 ERR_FAIL_COND(!sample);
206
207 // due to how webaudio works, sample cration is deferred until used
208 // sorry! WebAudio absolutely sucks
209
210 if (sample->index == -1) {
211 //create sample if not created
212 ERR_FAIL_COND(sample->tmp_data.size() == 0);
213 sample->index = sample_base;
214 /* clang-format off */
215 EM_ASM_({
216 _as_samples[$0] = _as_audioctx.createBuffer($1, $2, $3);
217 }, sample_base, sample->stereo ? 2 : 1, sample->length, sample->mix_rate);
218 /* clang-format on */
219
220 sample_base++;
221 int chans = sample->stereo ? 2 : 1;
222
223 for (int i = 0; i < chans; i++) {
224 /* clang-format off */
225 EM_ASM_({
226 _as_edited_buffer = _as_samples[$0].getChannelData($1);
227 }, sample->index, i);
228 /* clang-format on */
229
230 for (int j = 0; j < sample->length; j++) {
231 /* clang-format off */
232 EM_ASM_({
233 _as_edited_buffer[$0] = $1;
234 }, j, sample->tmp_data[j * chans + i]);
235 /* clang-format on */
236 }
237 }
238
239 sample->tmp_data.clear();
240 }
241
242 voice->sample_mix_rate = sample->mix_rate;
243 if (voice->mix_rate == -1) {
244 voice->mix_rate = voice->sample_mix_rate;
245 }
246
247 float freq_diff = Math::log(float(voice->mix_rate) / float(voice->sample_mix_rate)) / Math::log(2.0);
248 int detune = int(freq_diff * 1200.0);
249
250 /* clang-format off */
251 EM_ASM_({
252 if (_as_voices[$0] !== null) {
253 _as_voices[$0].stop(); //stop and byebye
254 }
255 _as_voices[$0] = _as_audioctx.createBufferSource();
256 _as_voices[$0].connect(_as_voice_gain[$0]);
257 _as_voices[$0].buffer = _as_samples[$1];
258 _as_voices[$0].loopStart.value = $1;
259 _as_voices[$0].loopEnd.value = $2;
260 _as_voices[$0].loop.value = $3;
261 _as_voices[$0].detune.value = $6;
262 _as_voice_pan[$0].pan.value = $4;
263 _as_voice_gain[$0].gain.value = $5;
264 _as_voices[$0].start();
265 _as_voices[$0].onended = function() {
266 _as_voices[$0].disconnect(_as_voice_gain[$0]);
267 _as_voices[$0] = null;
268 }
269 }, voice->index, sample->index, sample->mix_rate * sample->loop_begin, sample->mix_rate * sample->loop_end, sample->loop_format != SAMPLE_LOOP_NONE, voice->pan, voice->volume * fx_volume_scale, detune);
270 /* clang-format on */
271
272 voice->active = true;
273 }
274
voice_set_volume(RID p_voice,float p_volume)275 void AudioServerJavascript::voice_set_volume(RID p_voice, float p_volume) {
276
277 Voice *voice = voice_owner.get(p_voice);
278 ERR_FAIL_COND(!voice);
279
280 voice->volume = p_volume;
281
282 if (voice->active) {
283 /* clang-format off */
284 EM_ASM_({
285 _as_voice_gain[$0].gain.value = $1;
286 }, voice->index, voice->volume * fx_volume_scale);
287 /* clang-format on */
288 }
289 }
voice_set_pan(RID p_voice,float p_pan,float p_depth,float height)290 void AudioServerJavascript::voice_set_pan(RID p_voice, float p_pan, float p_depth, float height) {
291
292 Voice *voice = voice_owner.get(p_voice);
293 ERR_FAIL_COND(!voice);
294
295 voice->pan = p_pan;
296 voice->pan_depth = p_depth;
297 voice->pan_height = height;
298
299 if (voice->active) {
300 /* clang-format off */
301 EM_ASM_({
302 _as_voice_pan[$0].pan.value = $1;
303 }, voice->index, voice->pan);
304 /* clang-format on */
305 }
306 }
voice_set_filter(RID p_voice,FilterType p_type,float p_cutoff,float p_resonance,float p_gain)307 void AudioServerJavascript::voice_set_filter(RID p_voice, FilterType p_type, float p_cutoff, float p_resonance, float p_gain) {
308 }
voice_set_chorus(RID p_voice,float p_chorus)309 void AudioServerJavascript::voice_set_chorus(RID p_voice, float p_chorus) {
310 }
voice_set_reverb(RID p_voice,ReverbRoomType p_room_type,float p_reverb)311 void AudioServerJavascript::voice_set_reverb(RID p_voice, ReverbRoomType p_room_type, float p_reverb) {
312 }
voice_set_mix_rate(RID p_voice,int p_mix_rate)313 void AudioServerJavascript::voice_set_mix_rate(RID p_voice, int p_mix_rate) {
314
315 Voice *voice = voice_owner.get(p_voice);
316 ERR_FAIL_COND(!voice);
317
318 voice->mix_rate = p_mix_rate;
319
320 if (voice->active) {
321
322 float freq_diff = Math::log(float(voice->mix_rate) / float(voice->sample_mix_rate)) / Math::log(2.0);
323 int detune = int(freq_diff * 1200.0);
324 /* clang-format off */
325 EM_ASM_({
326 _as_voices[$0].detune.value = $1;
327 }, voice->index, detune);
328 /* clang-format on */
329 }
330 }
voice_set_positional(RID p_voice,bool p_positional)331 void AudioServerJavascript::voice_set_positional(RID p_voice, bool p_positional) {
332 }
333
voice_get_volume(RID p_voice) const334 float AudioServerJavascript::voice_get_volume(RID p_voice) const {
335
336 Voice *voice = voice_owner.get(p_voice);
337 ERR_FAIL_COND_V(!voice, 0);
338
339 return voice->volume;
340 }
voice_get_pan(RID p_voice) const341 float AudioServerJavascript::voice_get_pan(RID p_voice) const {
342
343 Voice *voice = voice_owner.get(p_voice);
344 ERR_FAIL_COND_V(!voice, 0);
345
346 return voice->pan;
347 }
voice_get_pan_depth(RID p_voice) const348 float AudioServerJavascript::voice_get_pan_depth(RID p_voice) const {
349 Voice *voice = voice_owner.get(p_voice);
350 ERR_FAIL_COND_V(!voice, 0);
351
352 return voice->pan_depth;
353 }
voice_get_pan_height(RID p_voice) const354 float AudioServerJavascript::voice_get_pan_height(RID p_voice) const {
355
356 Voice *voice = voice_owner.get(p_voice);
357 ERR_FAIL_COND_V(!voice, 0);
358
359 return voice->pan_height;
360 }
voice_get_filter_type(RID p_voice) const361 AudioServerJavascript::FilterType AudioServerJavascript::voice_get_filter_type(RID p_voice) const {
362
363 return FILTER_NONE;
364 }
voice_get_filter_cutoff(RID p_voice) const365 float AudioServerJavascript::voice_get_filter_cutoff(RID p_voice) const {
366
367 return 0;
368 }
voice_get_filter_resonance(RID p_voice) const369 float AudioServerJavascript::voice_get_filter_resonance(RID p_voice) const {
370
371 return 0;
372 }
voice_get_chorus(RID p_voice) const373 float AudioServerJavascript::voice_get_chorus(RID p_voice) const {
374
375 return 0;
376 }
voice_get_reverb_type(RID p_voice) const377 AudioServerJavascript::ReverbRoomType AudioServerJavascript::voice_get_reverb_type(RID p_voice) const {
378
379 return REVERB_SMALL;
380 }
voice_get_reverb(RID p_voice) const381 float AudioServerJavascript::voice_get_reverb(RID p_voice) const {
382
383 return 0;
384 }
385
voice_get_mix_rate(RID p_voice) const386 int AudioServerJavascript::voice_get_mix_rate(RID p_voice) const {
387
388 return 44100;
389 }
390
voice_is_positional(RID p_voice) const391 bool AudioServerJavascript::voice_is_positional(RID p_voice) const {
392
393 return false;
394 }
395
voice_stop(RID p_voice)396 void AudioServerJavascript::voice_stop(RID p_voice) {
397
398 Voice *voice = voice_owner.get(p_voice);
399 ERR_FAIL_COND(!voice);
400
401 if (voice->active) {
402 /* clang-format off */
403 EM_ASM_({
404 if (_as_voices[$0] !== null) {
405 _as_voices[$0].stop();
406 _as_voices[$0].disconnect(_as_voice_gain[$0]);
407 _as_voices[$0] = null;
408 }
409 }, voice->index);
410 /* clang-format on */
411
412 voice->active = false;
413 }
414 }
voice_is_active(RID p_voice) const415 bool AudioServerJavascript::voice_is_active(RID p_voice) const {
416 Voice *voice = voice_owner.get(p_voice);
417 ERR_FAIL_COND_V(!voice, false);
418
419 return voice->active;
420 }
421
422 /* STREAM API */
423
audio_stream_create(AudioStream * p_stream)424 RID AudioServerJavascript::audio_stream_create(AudioStream *p_stream) {
425
426 Stream *s = memnew(Stream);
427 s->audio_stream = p_stream;
428 s->event_stream = NULL;
429 s->active = false;
430 s->E = NULL;
431 s->volume_scale = 1.0;
432 p_stream->set_mix_rate(webaudio_mix_rate);
433
434 return stream_owner.make_rid(s);
435 }
436
event_stream_create(EventStream * p_stream)437 RID AudioServerJavascript::event_stream_create(EventStream *p_stream) {
438
439 Stream *s = memnew(Stream);
440 s->audio_stream = NULL;
441 s->event_stream = p_stream;
442 s->active = false;
443 s->E = NULL;
444 s->volume_scale = 1.0;
445 //p_stream->set_mix_rate(AudioDriverJavascript::get_singleton()->get_mix_rate());
446
447 return stream_owner.make_rid(s);
448 }
449
stream_set_active(RID p_stream,bool p_active)450 void AudioServerJavascript::stream_set_active(RID p_stream, bool p_active) {
451
452 Stream *s = stream_owner.get(p_stream);
453 ERR_FAIL_COND(!s);
454
455 if (s->active == p_active)
456 return;
457
458 s->active = p_active;
459 if (p_active)
460 s->E = active_audio_streams.push_back(s);
461 else {
462 active_audio_streams.erase(s->E);
463 s->E = NULL;
464 }
465 }
466
stream_is_active(RID p_stream) const467 bool AudioServerJavascript::stream_is_active(RID p_stream) const {
468
469 Stream *s = stream_owner.get(p_stream);
470 ERR_FAIL_COND_V(!s, false);
471 return s->active;
472 }
473
stream_set_volume_scale(RID p_stream,float p_scale)474 void AudioServerJavascript::stream_set_volume_scale(RID p_stream, float p_scale) {
475
476 Stream *s = stream_owner.get(p_stream);
477 ERR_FAIL_COND(!s);
478 s->volume_scale = p_scale;
479 }
480
stream_set_volume_scale(RID p_stream) const481 float AudioServerJavascript::stream_set_volume_scale(RID p_stream) const {
482
483 Stream *s = stream_owner.get(p_stream);
484 ERR_FAIL_COND_V(!s, 0);
485 return s->volume_scale;
486 }
487
488 /* Audio Physics API */
489
free(RID p_id)490 void AudioServerJavascript::free(RID p_id) {
491
492 if (voice_owner.owns(p_id)) {
493 Voice *voice = voice_owner.get(p_id);
494 ERR_FAIL_COND(!voice);
495
496 if (voice->active) {
497 /* clang-format off */
498 EM_ASM_({
499 if (_as_voices[$0] !== null) {
500 _as_voices[$0].stop();
501 _as_voices[$0].disconnect(_as_voice_gain[$0]);
502 }
503 }, voice->index);
504 /* clang-format on */
505 }
506
507 /* clang-format off */
508 EM_ASM_({
509 delete _as_voices[$0];
510 _as_voice_gain[$0].disconnect(_as_voice_pan[$0]);
511 delete _as_voice_gain[$0];
512 _as_voice_pan[$0].disconnect(_as_audioctx.destination);
513 delete _as_voice_pan[$0];
514 }, voice->index);
515 /* clang-format on */
516
517 voice_owner.free(p_id);
518 memdelete(voice);
519
520 } else if (sample_owner.owns(p_id)) {
521
522 Sample *sample = sample_owner.get(p_id);
523 ERR_FAIL_COND(!sample);
524
525 /* clang-format off */
526 EM_ASM_({
527 delete _as_samples[$0];
528 }, sample->index);
529 /* clang-format on */
530
531 sample_owner.free(p_id);
532 memdelete(sample);
533
534 } else if (stream_owner.owns(p_id)) {
535
536 Stream *s = stream_owner.get(p_id);
537
538 if (s->active) {
539 stream_set_active(p_id, false);
540 }
541
542 memdelete(s);
543 stream_owner.free(p_id);
544 }
545 }
546
547 extern "C" {
548
audio_server_mix_function(int p_frames)549 void audio_server_mix_function(int p_frames) {
550
551 //print_line("MIXI! "+itos(p_frames));
552 static_cast<AudioServerJavascript *>(AudioServerJavascript::get_singleton())->mix_to_js(p_frames);
553 }
554 }
555
mix_to_js(int p_frames)556 void AudioServerJavascript::mix_to_js(int p_frames) {
557
558 //process in chunks to make sure to never process more than INTERNAL_BUFFER_SIZE
559 int todo = p_frames;
560 int offset = 0;
561
562 while (todo) {
563
564 int tomix = MIN(todo, INTERNAL_BUFFER_SIZE);
565 driver_process_chunk(tomix);
566
567 /* clang-format off */
568 EM_ASM_({
569 var data = HEAPF32.subarray($0 / 4, $0 / 4 + $2 * 2);
570
571 for (var channel = 0; channel < _as_output_buffer.numberOfChannels; channel++) {
572 var outputData = _as_output_buffer.getChannelData(channel);
573 // Loop through samples
574 for (var sample = 0; sample < $2; sample++) {
575 // make output equal to the same as the input
576 outputData[sample + $1] = data[sample * 2 + channel];
577 }
578 }
579 }, internal_buffer, offset, tomix);
580 /* clang-format on */
581
582 todo -= tomix;
583 offset += tomix;
584 }
585 }
586
init()587 void AudioServerJavascript::init() {
588
589 /*
590 // clang-format off
591 EM_ASM(
592 console.log('server is ' + audio_server);
593 );
594 // clang-format on
595 */
596
597 //int latency = GLOBAL_DEF("javascript/audio_latency",16384);
598
599 internal_buffer_channels = 2;
600 internal_buffer = memnew_arr(float, INTERNAL_BUFFER_SIZE *internal_buffer_channels);
601 stream_buffer = memnew_arr(int32_t, INTERNAL_BUFFER_SIZE * 4); //max 4 channels
602
603 stream_volume = 0.3;
604
605 int buffer_latency = 16384;
606
607 /* clang-format off */
608 EM_ASM_( {
609 _as_script_node = _as_audioctx.createScriptProcessor($0, 0, 2);
610 _as_script_node.connect(_as_audioctx.destination);
611 console.log(_as_script_node.bufferSize);
612
613 _as_script_node.onaudioprocess = function(audioProcessingEvent) {
614 // The output buffer contains the samples that will be modified and played
615 _as_output_buffer = audioProcessingEvent.outputBuffer;
616 audio_server_mix_function(_as_output_buffer.getChannelData(0).length);
617 }
618 }, buffer_latency);
619 /* clang-format on */
620 }
621
finish()622 void AudioServerJavascript::finish() {
623 }
update()624 void AudioServerJavascript::update() {
625
626 for (List<Stream *>::Element *E = active_audio_streams.front(); E;) { //stream might be removed durnig this callback
627
628 List<Stream *>::Element *N = E->next();
629
630 if (E->get()->audio_stream)
631 E->get()->audio_stream->update();
632
633 E = N;
634 }
635 }
636
637 /* MISC config */
638
lock()639 void AudioServerJavascript::lock() {
640 }
unlock()641 void AudioServerJavascript::unlock() {
642 }
get_default_channel_count() const643 int AudioServerJavascript::get_default_channel_count() const {
644
645 return 1;
646 }
get_default_mix_rate() const647 int AudioServerJavascript::get_default_mix_rate() const {
648
649 return 44100;
650 }
651
set_stream_global_volume_scale(float p_volume)652 void AudioServerJavascript::set_stream_global_volume_scale(float p_volume) {
653
654 stream_volume_scale = p_volume;
655 }
set_fx_global_volume_scale(float p_volume)656 void AudioServerJavascript::set_fx_global_volume_scale(float p_volume) {
657
658 fx_volume_scale = p_volume;
659 }
set_event_voice_global_volume_scale(float p_volume)660 void AudioServerJavascript::set_event_voice_global_volume_scale(float p_volume) {
661 }
662
get_stream_global_volume_scale() const663 float AudioServerJavascript::get_stream_global_volume_scale() const {
664 return 1;
665 }
get_fx_global_volume_scale() const666 float AudioServerJavascript::get_fx_global_volume_scale() const {
667
668 return 1;
669 }
get_event_voice_global_volume_scale() const670 float AudioServerJavascript::get_event_voice_global_volume_scale() const {
671
672 return 1;
673 }
674
read_output_peak() const675 uint32_t AudioServerJavascript::read_output_peak() const {
676
677 return 0;
678 }
679
680 AudioServerJavascript *AudioServerJavascript::singleton = NULL;
681
get_singleton()682 AudioServer *AudioServerJavascript::get_singleton() {
683 return singleton;
684 }
685
get_mix_time() const686 double AudioServerJavascript::get_mix_time() const {
687
688 return 0;
689 }
get_output_delay() const690 double AudioServerJavascript::get_output_delay() const {
691
692 return 0;
693 }
694
driver_process_chunk(int p_frames)695 void AudioServerJavascript::driver_process_chunk(int p_frames) {
696
697 int samples = p_frames * internal_buffer_channels;
698
699 for (int i = 0; i < samples; i++) {
700 internal_buffer[i] = 0;
701 }
702
703 for (List<Stream *>::Element *E = active_audio_streams.front(); E; E = E->next()) {
704
705 ERR_CONTINUE(!E->get()->active); // bug?
706
707 AudioStream *as = E->get()->audio_stream;
708 if (!as)
709 continue;
710
711 int channels = as->get_channel_count();
712 if (channels == 0)
713 continue; // does not want mix
714 if (!as->mix(stream_buffer, p_frames))
715 continue; //nothing was mixed!!
716
717 int32_t stream_vol_scale = (stream_volume * stream_volume_scale * E->get()->volume_scale) * (1 << STREAM_SCALE_BITS);
718
719 #define STRSCALE(m_val) ((((m_val >> STREAM_SCALE_BITS) * stream_vol_scale) >> 8) / 8388608.0)
720 switch (channels) {
721 case 1: {
722
723 for (int i = 0; i < p_frames; i++) {
724
725 internal_buffer[(i << 1) + 0] += STRSCALE(stream_buffer[i]);
726 internal_buffer[(i << 1) + 1] += STRSCALE(stream_buffer[i]);
727 }
728 } break;
729 case 2: {
730
731 for (int i = 0; i < p_frames * 2; i++) {
732
733 internal_buffer[i] += STRSCALE(stream_buffer[i]);
734 }
735 } break;
736 case 4: {
737
738 for (int i = 0; i < p_frames; i++) {
739
740 internal_buffer[(i << 2) + 0] += STRSCALE((stream_buffer[(i << 2) + 0] + stream_buffer[(i << 2) + 2]) >> 1);
741 internal_buffer[(i << 2) + 1] += STRSCALE((stream_buffer[(i << 2) + 1] + stream_buffer[(i << 2) + 3]) >> 1);
742 }
743 } break;
744 }
745
746 #undef STRSCALE
747 }
748 }
749
750 /*void AudioServerSW::driver_process(int p_frames,int32_t *p_buffer) {
751
752
753 _output_delay=p_frames/double(AudioDriverSW::get_singleton()->get_mix_rate());
754 //process in chunks to make sure to never process more than INTERNAL_BUFFER_SIZE
755 int todo=p_frames;
756 while(todo) {
757
758 int tomix=MIN(todo,INTERNAL_BUFFER_SIZE);
759 driver_process_chunk(tomix,p_buffer);
760 p_buffer+=tomix;
761 todo-=tomix;
762 }
763
764
765 }*/
766
AudioServerJavascript()767 AudioServerJavascript::AudioServerJavascript() {
768
769 singleton = this;
770 sample_base = 1;
771 voice_base = 1;
772 /* clang-format off */
773 EM_ASM(
774 _as_samples = {};
775 _as_voices = {};
776 _as_voice_pan = {};
777 _as_voice_gain = {};
778
779 _as_audioctx = new (window.AudioContext || window.webkitAudioContext)();
780
781 audio_server_mix_function = cwrap('audio_server_mix_function', null, ['number']);
782 );
783 /* clang-format on */
784
785 /* clang-format off */
786 webaudio_mix_rate = EM_ASM_INT_V(
787 return _as_audioctx.sampleRate;
788 );
789 /* clang-format on */
790 print_line("WEBAUDIO MIX RATE: " + itos(webaudio_mix_rate));
791 event_voice_scale = 1.0;
792 fx_volume_scale = 1.0;
793 stream_volume_scale = 1.0;
794 }
795