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comparison Alc/backends/send.c @ 0:f9476ff7637e

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initial forking of open-al to create multiple listeners
author Robert McIntyre <rlm@mit.edu>
date Tue, 25 Oct 2011 13:02:31 -0700
parents
children 37f25cb34196
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-1:000000000000 0:f9476ff7637e
1 #include "config.h"
2 #include <stdlib.h>
3 #include "alMain.h"
4 #include "AL/al.h"
5 #include "AL/alc.h"
6 #include "alSource.h"
7 #include <jni.h>
8
9 //////////////////// Summary
10
11 struct send_data;
12 struct context_data;
13
14 static void addContext(ALCdevice *, ALCcontext *);
15 static void syncContexts(ALCcontext *master, ALCcontext *slave);
16 static void syncSources(ALsource *master, ALsource *slave,
17 ALCcontext *masterCtx, ALCcontext *slaveCtx);
18
19 static void syncSourcei(ALuint master, ALuint slave,
20 ALCcontext *masterCtx, ALCcontext *ctx2, ALenum param);
21 static void syncSourcef(ALuint master, ALuint slave,
22 ALCcontext *masterCtx, ALCcontext *ctx2, ALenum param);
23 static void syncSource3f(ALuint master, ALuint slave,
24 ALCcontext *masterCtx, ALCcontext *ctx2, ALenum param);
25
26 static void swapInContext(ALCdevice *, struct context_data *);
27 static void saveContext(ALCdevice *, struct context_data *);
28 static void limitContext(ALCdevice *, ALCcontext *);
29 static void unLimitContext(ALCdevice *);
30
31 static void init(ALCdevice *);
32 static void renderData(ALCdevice *, int samples);
33
34 #define UNUSED(x) (void)(x)
35
36 //////////////////// State
37
38 typedef struct context_data {
39 ALfloat ClickRemoval[MAXCHANNELS];
40 ALfloat PendingClicks[MAXCHANNELS];
41 ALvoid *renderBuffer;
42 ALCcontext *ctx;
43 } context_data;
44
45 typedef struct send_data {
46 ALuint size;
47 context_data **contexts;
48 ALuint numContexts;
49 ALuint maxContexts;
50 } send_data;
51
52
53
54 //////////////////// Context Creation / Synchronization
55
56 #define _MAKE_SYNC(NAME, INIT_EXPR, GET_EXPR, SET_EXPR) \
57 void NAME (ALuint sourceID1, ALuint sourceID2, \
58 ALCcontext *ctx1, ALCcontext *ctx2, \
59 ALenum param){ \
60 INIT_EXPR; \
61 ALCcontext *current = alcGetCurrentContext(); \
62 alcMakeContextCurrent(ctx1); \
63 GET_EXPR; \
64 alcMakeContextCurrent(ctx2); \
65 SET_EXPR; \
66 alcMakeContextCurrent(current); \
67 }
68
69 #define MAKE_SYNC(NAME, TYPE, GET, SET) \
70 _MAKE_SYNC(NAME, \
71 TYPE value, \
72 GET(sourceID1, param, &value), \
73 SET(sourceID2, param, value))
74
75 #define MAKE_SYNC3(NAME, TYPE, GET, SET) \
76 _MAKE_SYNC(NAME, \
77 TYPE value1; TYPE value2; TYPE value3;, \
78 GET(sourceID1, param, &value1, &value2, &value3), \
79 SET(sourceID2, param, value1, value2, value3))
80
81 MAKE_SYNC( syncSourcei, ALint, alGetSourcei, alSourcei);
82 MAKE_SYNC( syncSourcef, ALfloat, alGetSourcef, alSourcef);
83 MAKE_SYNC3(syncSource3i, ALint, alGetSource3i, alSource3i);
84 MAKE_SYNC3(syncSource3f, ALfloat, alGetSource3f, alSource3f);
85
86 void syncSources(ALsource *masterSource, ALsource *slaveSource,
87 ALCcontext *masterCtx, ALCcontext *slaveCtx){
88 ALuint master = masterSource->source;
89 ALuint slave = slaveSource->source;
90 ALCcontext *current = alcGetCurrentContext();
91
92 syncSourcef(master,slave,masterCtx,slaveCtx,AL_PITCH);
93 syncSourcef(master,slave,masterCtx,slaveCtx,AL_GAIN);
94 syncSourcef(master,slave,masterCtx,slaveCtx,AL_MAX_DISTANCE);
95 syncSourcef(master,slave,masterCtx,slaveCtx,AL_ROLLOFF_FACTOR);
96 syncSourcef(master,slave,masterCtx,slaveCtx,AL_REFERENCE_DISTANCE);
97 syncSourcef(master,slave,masterCtx,slaveCtx,AL_MIN_GAIN);
98 syncSourcef(master,slave,masterCtx,slaveCtx,AL_MAX_GAIN);
99 syncSourcef(master,slave,masterCtx,slaveCtx,AL_CONE_OUTER_GAIN);
100 syncSourcef(master,slave,masterCtx,slaveCtx,AL_CONE_INNER_ANGLE);
101 syncSourcef(master,slave,masterCtx,slaveCtx,AL_CONE_OUTER_ANGLE);
102 syncSourcef(master,slave,masterCtx,slaveCtx,AL_SEC_OFFSET);
103 syncSourcef(master,slave,masterCtx,slaveCtx,AL_SAMPLE_OFFSET);
104 syncSourcef(master,slave,masterCtx,slaveCtx,AL_BYTE_OFFSET);
105
106 syncSource3f(master,slave,masterCtx,slaveCtx,AL_POSITION);
107 syncSource3f(master,slave,masterCtx,slaveCtx,AL_VELOCITY);
108 syncSource3f(master,slave,masterCtx,slaveCtx,AL_DIRECTION);
109
110 syncSourcei(master,slave,masterCtx,slaveCtx,AL_SOURCE_RELATIVE);
111 syncSourcei(master,slave,masterCtx,slaveCtx,AL_LOOPING);
112
113 alcMakeContextCurrent(masterCtx);
114 ALint source_type;
115 alGetSourcei(master, AL_SOURCE_TYPE, &source_type);
116
117 // Only static sources are currently synchronized!
118 if (AL_STATIC == source_type){
119 ALint master_buffer;
120 ALint slave_buffer;
121 alGetSourcei(master, AL_BUFFER, &master_buffer);
122 alcMakeContextCurrent(slaveCtx);
123 alGetSourcei(slave, AL_BUFFER, &slave_buffer);
124 if (master_buffer != slave_buffer){
125 alSourcei(slave, AL_BUFFER, master_buffer);
126 }
127 }
128
129 // Synchronize the state of the two sources.
130 alcMakeContextCurrent(masterCtx);
131 ALint masterState;
132 ALint slaveState;
133
134 alGetSourcei(master, AL_SOURCE_STATE, &masterState);
135 alcMakeContextCurrent(slaveCtx);
136 alGetSourcei(slave, AL_SOURCE_STATE, &slaveState);
137
138 if (masterState != slaveState){
139 switch (masterState){
140 case AL_INITIAL : alSourceRewind(slave); break;
141 case AL_PLAYING : alSourcePlay(slave); break;
142 case AL_PAUSED : alSourcePause(slave); break;
143 case AL_STOPPED : alSourceStop(slave); break;
144 }
145 }
146 // Restore whatever context was previously active.
147 alcMakeContextCurrent(current);
148 }
149
150
151 void syncContexts(ALCcontext *master, ALCcontext *slave){
152 /* If there aren't sufficient sources in slave to mirror
153 the sources in master, create them. */
154 ALCcontext *current = alcGetCurrentContext();
155
156 UIntMap *masterSourceMap = &(master->SourceMap);
157 UIntMap *slaveSourceMap = &(slave->SourceMap);
158 ALuint numMasterSources = masterSourceMap->size;
159 ALuint numSlaveSources = slaveSourceMap->size;
160
161 alcMakeContextCurrent(slave);
162 if (numSlaveSources < numMasterSources){
163 ALuint numMissingSources = numMasterSources - numSlaveSources;
164 ALuint newSources[numMissingSources];
165 alGenSources(numMissingSources, newSources);
166 }
167
168 /* Now, slave is gauranteed to have at least as many sources
169 as master. Sync each source from master to the corresponding
170 source in slave. */
171 int i;
172 for(i = 0; i < masterSourceMap->size; i++){
173 syncSources((ALsource*)masterSourceMap->array[i].value,
174 (ALsource*)slaveSourceMap->array[i].value,
175 master, slave);
176 }
177 alcMakeContextCurrent(current);
178 }
179
180 static void addContext(ALCdevice *Device, ALCcontext *context){
181 send_data *data = (send_data*)Device->ExtraData;
182 // expand array if necessary
183 if (data->numContexts >= data->maxContexts){
184 ALuint newMaxContexts = data->maxContexts*2 + 1;
185 data->contexts = realloc(data->contexts, newMaxContexts*sizeof(context_data));
186 data->maxContexts = newMaxContexts;
187 }
188 // create context_data and add it to the main array
189 context_data *ctxData;
190 ctxData = (context_data*)calloc(1, sizeof(*ctxData));
191 ctxData->renderBuffer = malloc(data->size);
192 ctxData->ctx = context;
193
194 data->contexts[data->numContexts] = ctxData;
195 data->numContexts++;
196 }
197
198
199 //////////////////// Context Switching
200
201 /* A device brings along with it two pieces of state
202 * which have to be swapped in and out with each context.
203 */
204 static void swapInContext(ALCdevice *Device, context_data *ctxData){
205 memcpy(Device->ClickRemoval, ctxData->ClickRemoval, sizeof(ALfloat)*MAXCHANNELS);
206 memcpy(Device->PendingClicks, ctxData->PendingClicks, sizeof(ALfloat)*MAXCHANNELS);
207 }
208
209 static void saveContext(ALCdevice *Device, context_data *ctxData){
210 memcpy(ctxData->ClickRemoval, Device->ClickRemoval, sizeof(ALfloat)*MAXCHANNELS);
211 memcpy(ctxData->PendingClicks, Device->PendingClicks, sizeof(ALfloat)*MAXCHANNELS);
212 }
213
214 static ALCcontext **currentContext;
215 static ALuint currentNumContext;
216
217 /* By default, all contexts are rendered at once for each call to aluMixData.
218 * This function uses the internals of the ALCdecice struct to temporarly
219 * cause aluMixData to only render the chosen context.
220 */
221 static void limitContext(ALCdevice *Device, ALCcontext *ctx){
222 currentContext = Device->Contexts;
223 currentNumContext = Device->NumContexts;
224 Device->Contexts = &ctx;
225 Device->NumContexts = 1;
226 }
227
228 static void unLimitContext(ALCdevice *Device){
229 Device->Contexts = currentContext;
230 Device->NumContexts = currentNumContext;
231 }
232
233
234 //////////////////// Main Device Loop
235
236 /* Establish the LWJGL context as the main context, which will
237 * be synchronized to all the slave contexts
238 */
239 static void init(ALCdevice *Device){
240 ALCcontext *masterContext = alcGetCurrentContext();
241 addContext(Device, masterContext);
242 }
243
244
245 static void renderData(ALCdevice *Device, int samples){
246 if(!Device->Connected){return;}
247 send_data *data = (send_data*)Device->ExtraData;
248 ALCcontext *current = alcGetCurrentContext();
249
250 ALuint i;
251 for (i = 1; i < data->numContexts; i++){
252 syncContexts(data->contexts[0]->ctx , data->contexts[i]->ctx);
253 }
254
255 if ((uint) samples > Device->UpdateSize){
256 printf("exceeding internal buffer size; dropping samples\n");
257 printf("requested %d; available %d\n", samples, Device->UpdateSize);
258 samples = (int) Device->UpdateSize;
259 }
260
261 for (i = 0; i < data->numContexts; i++){
262 context_data *ctxData = data->contexts[i];
263 ALCcontext *ctx = ctxData->ctx;
264 alcMakeContextCurrent(ctx);
265 limitContext(Device, ctx);
266 swapInContext(Device, ctxData);
267 aluMixData(Device, ctxData->renderBuffer, samples);
268 saveContext(Device, ctxData);
269 unLimitContext(Device);
270 }
271 alcMakeContextCurrent(current);
272 }
273
274
275 //////////////////// JNI Methods
276
277 #include "com_aurellem_capture_AudioSend.h"
278
279 /*
280 * Class: com_aurellem_capture_AudioSend
281 * Method: nstep
282 * Signature: (JI)V
283 */
284 JNIEXPORT void JNICALL Java_com_aurellem_capture_AudioSend_nstep
285 (JNIEnv *env, jclass clazz, jlong device, jint samples){
286 UNUSED(env);UNUSED(clazz);UNUSED(device);
287 renderData((ALCdevice*)((intptr_t)device), samples);
288 }
289
290 /*
291 * Class: com_aurellem_capture_AudioSend
292 * Method: ngetSamples
293 * Signature: (JLjava/nio/ByteBuffer;III)V
294 */
295 JNIEXPORT void JNICALL Java_com_aurellem_capture_AudioSend_ngetSamples
296 (JNIEnv *env, jclass clazz, jlong device, jobject buffer, jint position,
297 jint samples, jint n){
298 UNUSED(clazz);
299
300 ALvoid *buffer_address =
301 ((ALbyte *)(((char*)(*env)->GetDirectBufferAddress(env, buffer)) + position));
302 ALCdevice *recorder = (ALCdevice*) ((intptr_t)device);
303 send_data *data = (send_data*)recorder->ExtraData;
304 if ((ALuint)n > data->numContexts){return;}
305 if ((uint) samples > data->size){
306 samples = (int) data->size;
307 }
308 memcpy(buffer_address, data->contexts[n]->renderBuffer, samples*sizeof(ALfloat));
309 }
310
311 /*
312 * Class: com_aurellem_capture_AudioSend
313 * Method: naddListener
314 * Signature: (J)V
315 */
316 JNIEXPORT void JNICALL Java_com_aurellem_capture_AudioSend_naddListener
317 (JNIEnv *env, jclass clazz, jlong device){
318 UNUSED(env); UNUSED(clazz);
319 printf("creating new context via naddListener\n");
320 ALCdevice *Device = (ALCdevice*) ((intptr_t)device);
321 ALCcontext *new = alcCreateContext(Device, NULL);
322 addContext(Device, new);
323 }
324
325 /*
326 * Class: com_aurellem_capture_AudioSend
327 * Method: nsetNthListener3f
328 * Signature: (IFFFJI)V
329 */
330 JNIEXPORT void JNICALL Java_com_aurellem_capture_AudioSend_nsetNthListener3f
331 (JNIEnv *env, jclass clazz, jint param,
332 jfloat v1, jfloat v2, jfloat v3, jlong device, jint contextNum){
333 UNUSED(env);UNUSED(clazz);
334
335 ALCdevice *Device = (ALCdevice*) ((intptr_t)device);
336 send_data *data = (send_data*)Device->ExtraData;
337
338 ALCcontext *current = alcGetCurrentContext();
339 if ((ALuint)contextNum > data->numContexts){return;}
340 alcMakeContextCurrent(data->contexts[contextNum]->ctx);
341 alListener3f(param, v1, v2, v3);
342 alcMakeContextCurrent(current);
343 }
344
345 /*
346 * Class: com_aurellem_capture_AudioSend
347 * Method: nsetNthListenerf
348 * Signature: (IFJI)V
349 */
350 JNIEXPORT void JNICALL Java_com_aurellem_capture_AudioSend_nsetNthListenerf
351 (JNIEnv *env, jclass clazz, jint param, jfloat v1, jlong device,
352 jint contextNum){
353
354 UNUSED(env);UNUSED(clazz);
355
356 ALCdevice *Device = (ALCdevice*) ((intptr_t)device);
357 send_data *data = (send_data*)Device->ExtraData;
358
359 ALCcontext *current = alcGetCurrentContext();
360 if ((ALuint)contextNum > data->numContexts){return;}
361 alcMakeContextCurrent(data->contexts[contextNum]->ctx);
362 alListenerf(param, v1);
363 alcMakeContextCurrent(current);
364 }
365
366 /*
367 * Class: com_aurellem_capture_AudioSend
368 * Method: ninitDevice
369 * Signature: (J)V
370 */
371 JNIEXPORT void JNICALL Java_com_aurellem_capture_AudioSend_ninitDevice
372 (JNIEnv *env, jclass clazz, jlong device){
373 UNUSED(env);UNUSED(clazz);
374
375 ALCdevice *Device = (ALCdevice*) ((intptr_t)device);
376 init(Device);
377
378 }
379
380
381 //////////////////// Device Initilization / Management
382
383 static const ALCchar sendDevice[] = "Multiple Audio Send";
384
385 static ALCboolean send_open_playback(ALCdevice *device,
386 const ALCchar *deviceName)
387 {
388 send_data *data;
389 // stop any buffering for stdout, so that I can
390 // see the printf statements in my terminal immediatley
391 setbuf(stdout, NULL);
392
393 if(!deviceName)
394 deviceName = sendDevice;
395 else if(strcmp(deviceName, sendDevice) != 0)
396 return ALC_FALSE;
397 data = (send_data*)calloc(1, sizeof(*data));
398 device->szDeviceName = strdup(deviceName);
399 device->ExtraData = data;
400 return ALC_TRUE;
401 }
402
403 static void send_close_playback(ALCdevice *device)
404 {
405 send_data *data = (send_data*)device->ExtraData;
406 alcMakeContextCurrent(NULL);
407 ALuint i;
408 // Destroy all slave contexts. LWJGL will take care of
409 // its own context.
410 for (i = 1; i < data->numContexts; i++){
411 context_data *ctxData = data->contexts[i];
412 alcDestroyContext(ctxData->ctx);
413 free(ctxData->renderBuffer);
414 free(ctxData);
415 }
416 free(data);
417 device->ExtraData = NULL;
418 }
419
420 static ALCboolean send_reset_playback(ALCdevice *device)
421 {
422 send_data *data = (send_data*)device->ExtraData;
423 ALuint channels=0, bits=0;
424 device->FmtType = DevFmtShort;
425 bits = BytesFromDevFmt(device->FmtType) * 8;
426 channels = ChannelsFromDevFmt(device->FmtChans);
427 data->size = device->UpdateSize * channels * bits / 8;
428
429 return ALC_TRUE;
430 }
431
432 static void send_stop_playback(ALCdevice *Device){
433 UNUSED(Device);
434 }
435
436 static const BackendFuncs send_funcs = {
437 send_open_playback,
438 send_close_playback,
439 send_reset_playback,
440 send_stop_playback,
441 NULL,
442 NULL, /* These would be filled with functions to */
443 NULL, /* handle capturing audio if we we into that */
444 NULL, /* sort of thing... */
445 NULL,
446 NULL
447 };
448
449 ALCboolean alc_send_init(BackendFuncs *func_list){
450 *func_list = send_funcs;
451 return ALC_TRUE;
452 }
453
454 void alc_send_deinit(void){}
455
456 void alc_send_probe(enum DevProbe type)
457 {
458 switch(type)
459 {
460 case DEVICE_PROBE:
461 AppendDeviceList(sendDevice);
462 break;
463 case ALL_DEVICE_PROBE:
464 AppendAllDeviceList(sendDevice);
465 break;
466 case CAPTURE_DEVICE_PROBE:
467 break;
468 }
469 }
470
471
472