Module: Audio

Defined in:
ext/audio/audio.c

Class Method Summary collapse

Class Method Details

.add_delay_tap(channel_id, time_ms, volume) ⇒ Object 



399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
 
# File 'ext/audio/audio.c', line 399

VALUE audio_add_delay_tap(VALUE self, VALUE channel_id, VALUE time_ms, VALUE volume)
{
    int channel = NUM2INT(channel_id);
    float ms = (float)NUM2DBL(time_ms);
    float vol = (float)NUM2DBL(volume);

    if (channel < 0 || channel >= MAX_CHANNELS || delay_nodes[channel] == NULL) {
        rb_raise(rb_eArgError, "Invalid channel or no delay node: %d", channel);
        return Qnil;
    }

    int tap_id = multi_tap_delay_add_tap(delay_nodes[channel], ms, vol);
    if (tap_id < 0) {
        rb_raise(rb_eRuntimeError, "Failed to add delay tap (max taps reached)");
        return Qnil;
    }

    return rb_int2inum(tap_id);
}

.duration(clip) ⇒ Object 



161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
 
# File 'ext/audio/audio.c', line 161

VALUE audio_duration(VALUE self, VALUE clip)
{
    int clip_id = NUM2INT(clip);

    if (clip_id < 0 || clip_id >= sound_count || sounds[clip_id] == NULL) {
        rb_raise(rb_eArgError, "Invalid clip ID: %d", clip_id);
        return Qnil;
    }

    float length;
    ma_result result = ma_sound_get_length_in_seconds(sounds[clip_id], &length);
    if (result != MA_SUCCESS) {
        return Qnil;
    }

    return rb_float_new(length);
}

.enable_reverb(channel_id, enabled) ⇒ Object 



467
468
469
470
471
472
473
474
475
476
477
478
 
# File 'ext/audio/audio.c', line 467

VALUE audio_enable_reverb(VALUE self, VALUE channel_id, VALUE enabled)
{
    int channel = NUM2INT(channel_id);
    ma_bool32 en = RTEST(enabled) ? MA_TRUE : MA_FALSE;

    if (channel < 0 || channel >= MAX_CHANNELS || reverb_nodes[channel] == NULL) {
        return Qnil;
    }

    reverb_set_enabled(reverb_nodes[channel], en);
    return Qnil;
}

.init ⇒ Object 



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
 
# File 'ext/audio/audio.c', line 92

VALUE audio_init(VALUE self)
{
    if (engine_initialized) {
        return Qnil;
    }

    const char *driver = getenv("NATIVE_AUDIO_DRIVER");
    int use_null = (driver != NULL && strcmp(driver, "null") == 0);

    ma_engine_config config = ma_engine_config_init();
    config.listenerCount = 1;

    if (use_null) {
        ma_backend backends[] = { ma_backend_null };
        ma_result ctx_result = ma_context_init(backends, 1, NULL, &context);
        if (ctx_result != MA_SUCCESS) {
            rb_raise(rb_eRuntimeError, "Failed to initialize null audio context");
            return Qnil;
        }
        context_initialized = 1;
        using_null_backend = 1;
        config.pContext = &context;
    }

    ma_result result = ma_engine_init(&config, &engine);

    if (result != MA_SUCCESS) {
        if (context_initialized) {
            ma_context_uninit(&context);
            context_initialized = 0;
        }
        rb_raise(rb_eRuntimeError, "Failed to initialize audio engine");
        return Qnil;
    }

    engine_initialized = 1;
    rb_set_end_proc(cleanup_audio, Qnil);

    return Qnil;
}

.load(file) ⇒ Object 



137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
 
# File 'ext/audio/audio.c', line 137

VALUE audio_load(VALUE self, VALUE file)
{
    const char *path = StringValueCStr(file);

    ma_sound *sound = (ma_sound *)malloc(sizeof(ma_sound));
    if (sound == NULL) {
        rb_raise(rb_eRuntimeError, "Failed to allocate memory for sound");
        return Qnil;
    }

    ma_result result = ma_sound_init_from_file(&engine, path, MA_SOUND_FLAG_DECODE, NULL, NULL, sound);
    if (result != MA_SUCCESS) {
        free(sound);
        rb_raise(rb_eRuntimeError, "Failed to load audio file: %s", path);
        return Qnil;
    }

    int id = sound_count;
    sounds[id] = sound;
    sound_count++;

    return rb_int2inum(id);
}

.pause(channel_id) ⇒ Object 



303
304
305
306
307
308
309
310
311
312
313
314
 
# File 'ext/audio/audio.c', line 303

VALUE audio_pause(VALUE self, VALUE channel_id)
{
    int channel = NUM2INT(channel_id);

    if (channel < 0 || channel >= MAX_CHANNELS || channels[channel] == NULL) {
        return Qnil;
    }

    ma_sound_stop(channels[channel]);

    return Qnil;
}

.play(channel_id, clip) ⇒ Object 



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
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
 
# File 'ext/audio/audio.c', line 183

VALUE audio_play(VALUE self, VALUE channel_id, VALUE clip)
{
    int channel = NUM2INT(channel_id);
    int clip_id = NUM2INT(clip);

    if (clip_id < 0 || clip_id >= sound_count || sounds[clip_id] == NULL) {
        rb_raise(rb_eArgError, "Invalid clip ID: %d", clip_id);
        return Qnil;
    }

    if (channel < 0 || channel >= MAX_CHANNELS) {
        rb_raise(rb_eArgError, "Invalid channel ID: %d", channel);
        return Qnil;
    }

    // Clean up existing resources on this channel
    if (channels[channel] != NULL) {
        ma_sound_stop(channels[channel]);
        ma_sound_uninit(channels[channel]);
        free(channels[channel]);
        channels[channel] = NULL;
    }

    if (delay_nodes[channel] != NULL) {
        multi_tap_delay_uninit(delay_nodes[channel]);
        free(delay_nodes[channel]);
        delay_nodes[channel] = NULL;
    }

    if (reverb_nodes[channel] != NULL) {
        reverb_uninit(reverb_nodes[channel]);
        free(reverb_nodes[channel]);
        reverb_nodes[channel] = NULL;
    }

    // Create sound copy for playback
    ma_sound *playback = (ma_sound *)malloc(sizeof(ma_sound));
    if (playback == NULL) {
        rb_raise(rb_eRuntimeError, "Failed to allocate memory for playback");
        return Qnil;
    }

    ma_result result = ma_sound_init_copy(&engine, sounds[clip_id], MA_SOUND_FLAG_NO_DEFAULT_ATTACHMENT, NULL, playback);
    if (result != MA_SUCCESS) {
        free(playback);
        rb_raise(rb_eRuntimeError, "Failed to create sound copy for playback");
        return Qnil;
    }

    // Create delay node
    ma_uint32 sampleRate = ma_engine_get_sample_rate(&engine);
    ma_uint32 numChannels = ma_engine_get_channels(&engine);

    multi_tap_delay_node *delayNode = (multi_tap_delay_node *)malloc(sizeof(multi_tap_delay_node));
    if (delayNode == NULL) {
        ma_sound_uninit(playback);
        free(playback);
        rb_raise(rb_eRuntimeError, "Failed to allocate memory for delay node");
        return Qnil;
    }

    result = multi_tap_delay_init(delayNode, ma_engine_get_node_graph(&engine), sampleRate, numChannels);
    if (result != MA_SUCCESS) {
        free(delayNode);
        ma_sound_uninit(playback);
        free(playback);
        rb_raise(rb_eRuntimeError, "Failed to initialize delay node");
        return Qnil;
    }

    // Create reverb node
    reverb_node *reverbNode = (reverb_node *)malloc(sizeof(reverb_node));
    if (reverbNode == NULL) {
        multi_tap_delay_uninit(delayNode);
        free(delayNode);
        ma_sound_uninit(playback);
        free(playback);
        rb_raise(rb_eRuntimeError, "Failed to allocate memory for reverb node");
        return Qnil;
    }

    result = reverb_init(reverbNode, ma_engine_get_node_graph(&engine), sampleRate, numChannels);
    if (result != MA_SUCCESS) {
        free(reverbNode);
        multi_tap_delay_uninit(delayNode);
        free(delayNode);
        ma_sound_uninit(playback);
        free(playback);
        rb_raise(rb_eRuntimeError, "Failed to initialize reverb node");
        return Qnil;
    }

    // Route: sound -> delay_node -> reverb_node -> endpoint
    ma_node *endpoint = ma_engine_get_endpoint(&engine);
    ma_node_attach_output_bus(&reverbNode->base, 0, endpoint, 0);
    ma_node_attach_output_bus(&delayNode->base, 0, &reverbNode->base, 0);
    ma_node_attach_output_bus((ma_node *)playback, 0, &delayNode->base, 0);

    delay_nodes[channel] = delayNode;
    reverb_nodes[channel] = reverbNode;
    channels[channel] = playback;
    ma_sound_start(playback);

    return rb_int2inum(channel);
}

.remove_delay_tap(channel_id, tap_id) ⇒ Object 



419
420
421
422
423
424
425
426
427
428
429
430
431
 
# File 'ext/audio/audio.c', line 419

VALUE audio_remove_delay_tap(VALUE self, VALUE channel_id, VALUE tap_id)
{
    int channel = NUM2INT(channel_id);
    int tap = NUM2INT(tap_id);

    if (channel < 0 || channel >= MAX_CHANNELS || delay_nodes[channel] == NULL) {
        return Qnil;
    }

    multi_tap_delay_remove_tap(delay_nodes[channel], tap);

    return Qnil;
}

.resume(channel_id) ⇒ Object 



316
317
318
319
320
321
322
323
324
325
326
327
 
# File 'ext/audio/audio.c', line 316

VALUE audio_resume(VALUE self, VALUE channel_id)
{
    int channel = NUM2INT(channel_id);

    if (channel < 0 || channel >= MAX_CHANNELS || channels[channel] == NULL) {
        return Qnil;
    }

    ma_sound_start(channels[channel]);

    return Qnil;
}

.set_delay_tap_time(channel_id, tap_id, time_ms) ⇒ Object 



448
449
450
451
452
453
454
455
456
457
458
459
460
461
 
# File 'ext/audio/audio.c', line 448

VALUE audio_set_delay_tap_time(VALUE self, VALUE channel_id, VALUE tap_id, VALUE time_ms)
{
    int channel = NUM2INT(channel_id);
    int tap = NUM2INT(tap_id);
    float ms = (float)NUM2DBL(time_ms);

    if (channel < 0 || channel >= MAX_CHANNELS || delay_nodes[channel] == NULL) {
        return Qnil;
    }

    multi_tap_delay_set_time(delay_nodes[channel], tap, ms);

    return Qnil;
}

.set_delay_tap_volume(channel_id, tap_id, volume) ⇒ Object 



433
434
435
436
437
438
439
440
441
442
443
444
445
446
 
# File 'ext/audio/audio.c', line 433

VALUE audio_set_delay_tap_volume(VALUE self, VALUE channel_id, VALUE tap_id, VALUE volume)
{
    int channel = NUM2INT(channel_id);
    int tap = NUM2INT(tap_id);
    float vol = (float)NUM2DBL(volume);

    if (channel < 0 || channel >= MAX_CHANNELS || delay_nodes[channel] == NULL) {
        return Qnil;
    }

    multi_tap_delay_set_volume(delay_nodes[channel], tap, vol);

    return Qnil;
}

.set_looping(channel_id, looping) ⇒ Object 



381
382
383
384
385
386
387
388
389
390
391
392
393
 
# File 'ext/audio/audio.c', line 381

VALUE audio_set_looping(VALUE self, VALUE channel_id, VALUE looping)
{
    int channel = NUM2INT(channel_id);
    ma_bool32 loop = RTEST(looping) ? MA_TRUE : MA_FALSE;

    if (channel < 0 || channel >= MAX_CHANNELS || channels[channel] == NULL) {
        return Qnil;
    }

    ma_sound_set_looping(channels[channel], loop);

    return Qnil;
}

.set_pitch(channel_id, pitch) ⇒ Object 



347
348
349
350
351
352
353
354
355
356
357
358
359
 
# File 'ext/audio/audio.c', line 347

VALUE audio_set_pitch(VALUE self, VALUE channel_id, VALUE pitch)
{
    int channel = NUM2INT(channel_id);
    float p = (float)NUM2DBL(pitch);

    if (channel < 0 || channel >= MAX_CHANNELS || channels[channel] == NULL) {
        return Qnil;
    }

    ma_sound_set_pitch(channels[channel], p);

    return Qnil;
}

.set_pos(channel_id, angle, distance) ⇒ Object 



361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
 
# File 'ext/audio/audio.c', line 361

VALUE audio_set_pos(VALUE self, VALUE channel_id, VALUE angle, VALUE distance)
{
    int channel = NUM2INT(channel_id);
    int ang = NUM2INT(angle);
    int dist = NUM2INT(distance);

    if (channel < 0 || channel >= MAX_CHANNELS || channels[channel] == NULL) {
        return Qnil;
    }

    float rad = ang * (MA_PI / 180.0f);
    float normalized_dist = dist / 255.0f;
    float x = normalized_dist * sinf(rad);
    float z = -normalized_dist * cosf(rad);

    ma_sound_set_position(channels[channel], x, 0.0f, z);

    return Qnil;
}

.set_reverb_damping(channel_id, damp) ⇒ Object 



493
494
495
496
497
498
499
500
501
502
503
504
 
# File 'ext/audio/audio.c', line 493

VALUE audio_set_reverb_damping(VALUE self, VALUE channel_id, VALUE damp)
{
    int channel = NUM2INT(channel_id);
    float d = (float)NUM2DBL(damp);

    if (channel < 0 || channel >= MAX_CHANNELS || reverb_nodes[channel] == NULL) {
        return Qnil;
    }

    reverb_set_damping(reverb_nodes[channel], d);
    return Qnil;
}

.set_reverb_dry(channel_id, dry) ⇒ Object 



519
520
521
522
523
524
525
526
527
528
529
530
 
# File 'ext/audio/audio.c', line 519

VALUE audio_set_reverb_dry(VALUE self, VALUE channel_id, VALUE dry)
{
    int channel = NUM2INT(channel_id);
    float d = (float)NUM2DBL(dry);

    if (channel < 0 || channel >= MAX_CHANNELS || reverb_nodes[channel] == NULL) {
        return Qnil;
    }

    reverb_set_dry(reverb_nodes[channel], d);
    return Qnil;
}

.set_reverb_room_size(channel_id, size) ⇒ Object 



480
481
482
483
484
485
486
487
488
489
490
491
 
# File 'ext/audio/audio.c', line 480

VALUE audio_set_reverb_room_size(VALUE self, VALUE channel_id, VALUE size)
{
    int channel = NUM2INT(channel_id);
    float s = (float)NUM2DBL(size);

    if (channel < 0 || channel >= MAX_CHANNELS || reverb_nodes[channel] == NULL) {
        return Qnil;
    }

    reverb_set_room_size(reverb_nodes[channel], s);
    return Qnil;
}

.set_reverb_wet(channel_id, wet) ⇒ Object 



506
507
508
509
510
511
512
513
514
515
516
517
 
# File 'ext/audio/audio.c', line 506

VALUE audio_set_reverb_wet(VALUE self, VALUE channel_id, VALUE wet)
{
    int channel = NUM2INT(channel_id);
    float w = (float)NUM2DBL(wet);

    if (channel < 0 || channel >= MAX_CHANNELS || reverb_nodes[channel] == NULL) {
        return Qnil;
    }

    reverb_set_wet(reverb_nodes[channel], w);
    return Qnil;
}

.set_volume(channel_id, volume) ⇒ Object 



333
334
335
336
337
338
339
340
341
342
343
344
345
 
# File 'ext/audio/audio.c', line 333

VALUE audio_set_volume(VALUE self, VALUE channel_id, VALUE volume)
{
    int channel = NUM2INT(channel_id);
    int vol = NUM2INT(volume);

    if (channel < 0 || channel >= MAX_CHANNELS || channels[channel] == NULL) {
        return Qnil;
    }

    ma_sound_set_volume(channels[channel], vol / 128.0f);

    return Qnil;
}

.stop(channel_id) ⇒ Object 



289
290
291
292
293
294
295
296
297
298
299
300
301
 
# File 'ext/audio/audio.c', line 289

VALUE audio_stop(VALUE self, VALUE channel_id)
{
    int channel = NUM2INT(channel_id);

    if (channel < 0 || channel >= MAX_CHANNELS || channels[channel] == NULL) {
        return Qnil;
    }

    ma_sound_stop(channels[channel]);
    ma_sound_seek_to_pcm_frame(channels[channel], 0);

    return Qnil;
}