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00026 #include "asterisk.h"
00027
00028 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
00029
00030 #include <stdio.h>
00031 #include <stdlib.h>
00032 #include <string.h>
00033 #include <signal.h>
00034 #include <errno.h>
00035 #include <unistd.h>
00036
00037 #include "asterisk/logger.h"
00038 #include "asterisk/channel.h"
00039 #include "asterisk/options.h"
00040 #include "asterisk/utils.h"
00041 #include "asterisk/lock.h"
00042 #include "asterisk/linkedlists.h"
00043 #include "asterisk/audiohook.h"
00044 #include "asterisk/slinfactory.h"
00045 #include "asterisk/frame.h"
00046 #include "asterisk/translate.h"
00047
00048 struct ast_audiohook_translate {
00049 struct ast_trans_pvt *trans_pvt;
00050 int format;
00051 };
00052
00053 struct ast_audiohook_list {
00054 struct ast_audiohook_translate in_translate[2];
00055 struct ast_audiohook_translate out_translate[2];
00056 AST_LIST_HEAD_NOLOCK(, ast_audiohook) spy_list;
00057 AST_LIST_HEAD_NOLOCK(, ast_audiohook) whisper_list;
00058 AST_LIST_HEAD_NOLOCK(, ast_audiohook) manipulate_list;
00059 };
00060
00061
00062
00063
00064
00065
00066
00067 int ast_audiohook_init(struct ast_audiohook *audiohook, enum ast_audiohook_type type, const char *source)
00068 {
00069
00070 audiohook->type = type;
00071 audiohook->source = source;
00072
00073
00074 ast_mutex_init(&audiohook->lock);
00075 ast_cond_init(&audiohook->trigger, NULL);
00076
00077
00078 switch (type) {
00079 case AST_AUDIOHOOK_TYPE_SPY:
00080 ast_slinfactory_init(&audiohook->read_factory);
00081 case AST_AUDIOHOOK_TYPE_WHISPER:
00082 ast_slinfactory_init(&audiohook->write_factory);
00083 break;
00084 default:
00085 break;
00086 }
00087
00088
00089 audiohook->status = AST_AUDIOHOOK_STATUS_NEW;
00090
00091 return 0;
00092 }
00093
00094
00095
00096
00097
00098 int ast_audiohook_destroy(struct ast_audiohook *audiohook)
00099 {
00100
00101 switch (audiohook->type) {
00102 case AST_AUDIOHOOK_TYPE_SPY:
00103 ast_slinfactory_destroy(&audiohook->read_factory);
00104 case AST_AUDIOHOOK_TYPE_WHISPER:
00105 ast_slinfactory_destroy(&audiohook->write_factory);
00106 break;
00107 default:
00108 break;
00109 }
00110
00111
00112 if (audiohook->trans_pvt)
00113 ast_translator_free_path(audiohook->trans_pvt);
00114
00115
00116 ast_cond_destroy(&audiohook->trigger);
00117 ast_mutex_destroy(&audiohook->lock);
00118
00119 return 0;
00120 }
00121
00122
00123
00124
00125
00126
00127
00128 int ast_audiohook_write_frame(struct ast_audiohook *audiohook, enum ast_audiohook_direction direction, struct ast_frame *frame)
00129 {
00130 struct ast_slinfactory *factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_factory : &audiohook->write_factory);
00131 struct timeval *time = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_time : &audiohook->write_time);
00132
00133
00134 ast_slinfactory_feed(factory, frame);
00135
00136
00137 *time = ast_tvnow();
00138
00139
00140 if ((ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_MODE) == AST_AUDIOHOOK_TRIGGER_READ) && (direction == AST_AUDIOHOOK_DIRECTION_READ)) {
00141 ast_cond_signal(&audiohook->trigger);
00142 } else if ((ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_MODE) == AST_AUDIOHOOK_TRIGGER_WRITE) && (direction == AST_AUDIOHOOK_DIRECTION_WRITE)) {
00143 ast_cond_signal(&audiohook->trigger);
00144 } else if (ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_SYNC)) {
00145 ast_cond_signal(&audiohook->trigger);
00146 }
00147
00148 return 0;
00149 }
00150
00151 static struct ast_frame *audiohook_read_frame_single(struct ast_audiohook *audiohook, size_t samples, enum ast_audiohook_direction direction)
00152 {
00153 struct ast_slinfactory *factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_factory : &audiohook->write_factory);
00154 int vol = (direction == AST_AUDIOHOOK_DIRECTION_READ ? audiohook->options.read_volume : audiohook->options.write_volume);
00155 short buf[samples];
00156 struct ast_frame frame = {
00157 .frametype = AST_FRAME_VOICE,
00158 .subclass = AST_FORMAT_SLINEAR,
00159 .data = buf,
00160 .datalen = sizeof(buf),
00161 .samples = samples,
00162 };
00163
00164
00165 if (samples > ast_slinfactory_available(factory))
00166 return NULL;
00167
00168
00169 if (!ast_slinfactory_read(factory, buf, samples))
00170 return NULL;
00171
00172
00173 if (vol)
00174 ast_frame_adjust_volume(&frame, vol);
00175
00176 return ast_frdup(&frame);
00177 }
00178
00179 static struct ast_frame *audiohook_read_frame_both(struct ast_audiohook *audiohook, size_t samples)
00180 {
00181 int i = 0, usable_read, usable_write;
00182 short buf1[samples], buf2[samples], *read_buf = NULL, *write_buf = NULL, *final_buf = NULL, *data1 = NULL, *data2 = NULL;
00183 struct ast_frame frame = {
00184 .frametype = AST_FRAME_VOICE,
00185 .subclass = AST_FORMAT_SLINEAR,
00186 .data = NULL,
00187 .datalen = sizeof(buf1),
00188 .samples = samples,
00189 };
00190
00191
00192 usable_read = (ast_slinfactory_available(&audiohook->read_factory) >= samples ? 1 : 0);
00193 usable_write = (ast_slinfactory_available(&audiohook->write_factory) >= samples ? 1 : 0);
00194
00195 if (!usable_read && !usable_write) {
00196
00197 if (option_debug)
00198 ast_log(LOG_DEBUG, "Read factory %p and write factory %p both fail to provide %zd samples\n", &audiohook->read_factory, &audiohook->write_factory, samples);
00199 return NULL;
00200 }
00201
00202
00203 if (usable_read && !usable_write && (ast_tvdiff_ms(ast_tvnow(), audiohook->write_time) < (samples/8)*2)) {
00204 if (option_debug)
00205 ast_log(LOG_DEBUG, "Write factory %p was pretty quick last time, waiting for them.\n", &audiohook->write_factory);
00206 return NULL;
00207 }
00208
00209
00210 if (usable_write && !usable_read && (ast_tvdiff_ms(ast_tvnow(), audiohook->write_time) < (samples/8)*2)) {
00211 if (option_debug)
00212 ast_log(LOG_DEBUG, "Read factory %p was pretty quick last time, waiting for them.\n", &audiohook->read_factory);
00213 return NULL;
00214 }
00215
00216
00217 if (usable_read && ast_slinfactory_available(&audiohook->read_factory) >= samples) {
00218 if (ast_slinfactory_read(&audiohook->read_factory, buf1, samples)) {
00219 read_buf = buf1;
00220
00221 if (audiohook->options.read_volume) {
00222 int count = 0;
00223 short adjust_value = abs(audiohook->options.read_volume);
00224 for (count = 0; count < samples; count++) {
00225 if (audiohook->options.read_volume > 0)
00226 ast_slinear_saturated_multiply(&buf1[count], &adjust_value);
00227 else if (audiohook->options.read_volume < 0)
00228 ast_slinear_saturated_divide(&buf1[count], &adjust_value);
00229 }
00230 }
00231 }
00232 } else if (option_debug)
00233 ast_log(LOG_DEBUG, "Failed to get %zd samples from read factory %p\n", samples, &audiohook->read_factory);
00234
00235
00236 if (usable_write && ast_slinfactory_available(&audiohook->write_factory) >= samples) {
00237 if (ast_slinfactory_read(&audiohook->write_factory, buf2, samples)) {
00238 write_buf = buf2;
00239
00240 if (audiohook->options.write_volume) {
00241 int count = 0;
00242 short adjust_value = abs(audiohook->options.write_volume);
00243 for (count = 0; count < samples; count++) {
00244 if (audiohook->options.write_volume > 0)
00245 ast_slinear_saturated_multiply(&buf2[count], &adjust_value);
00246 else if (audiohook->options.write_volume < 0)
00247 ast_slinear_saturated_divide(&buf2[count], &adjust_value);
00248 }
00249 }
00250 }
00251 } else if (option_debug)
00252 ast_log(LOG_DEBUG, "Failed to get %zd samples from write factory %p\n", samples, &audiohook->write_factory);
00253
00254
00255 if (!read_buf && !write_buf)
00256 return NULL;
00257 else if (read_buf && write_buf) {
00258 for (i = 0, data1 = read_buf, data2 = write_buf; i < samples; i++, data1++, data2++)
00259 ast_slinear_saturated_add(data1, data2);
00260 final_buf = buf1;
00261 } else if (read_buf)
00262 final_buf = buf1;
00263 else if (write_buf)
00264 final_buf = buf2;
00265
00266
00267 frame.data = final_buf;
00268
00269
00270 return ast_frdup(&frame);
00271 }
00272
00273
00274
00275
00276
00277
00278
00279
00280 struct ast_frame *ast_audiohook_read_frame(struct ast_audiohook *audiohook, size_t samples, enum ast_audiohook_direction direction, int format)
00281 {
00282 struct ast_frame *read_frame = NULL, *final_frame = NULL;
00283
00284 if (!(read_frame = (direction == AST_AUDIOHOOK_DIRECTION_BOTH ? audiohook_read_frame_both(audiohook, samples) : audiohook_read_frame_single(audiohook, samples, direction))))
00285 return NULL;
00286
00287
00288 if (format != AST_FORMAT_SLINEAR) {
00289
00290 if (audiohook->format != format) {
00291 if (audiohook->trans_pvt) {
00292 ast_translator_free_path(audiohook->trans_pvt);
00293 audiohook->trans_pvt = NULL;
00294 }
00295
00296 if (!(audiohook->trans_pvt = ast_translator_build_path(format, AST_FORMAT_SLINEAR))) {
00297 ast_frfree(read_frame);
00298 return NULL;
00299 }
00300 }
00301
00302 final_frame = ast_translate(audiohook->trans_pvt, read_frame, 1);
00303 } else {
00304 final_frame = read_frame;
00305 }
00306
00307 return final_frame;
00308 }
00309
00310
00311
00312
00313
00314
00315 int ast_audiohook_attach(struct ast_channel *chan, struct ast_audiohook *audiohook)
00316 {
00317 ast_channel_lock(chan);
00318
00319 if (!chan->audiohooks) {
00320
00321 if (!(chan->audiohooks = ast_calloc(1, sizeof(*chan->audiohooks)))) {
00322 ast_channel_unlock(chan);
00323 return -1;
00324 }
00325 AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->spy_list);
00326 AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->whisper_list);
00327 AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->manipulate_list);
00328 }
00329
00330
00331 if (audiohook->type == AST_AUDIOHOOK_TYPE_SPY)
00332 AST_LIST_INSERT_TAIL(&chan->audiohooks->spy_list, audiohook, list);
00333 else if (audiohook->type == AST_AUDIOHOOK_TYPE_WHISPER)
00334 AST_LIST_INSERT_TAIL(&chan->audiohooks->whisper_list, audiohook, list);
00335 else if (audiohook->type == AST_AUDIOHOOK_TYPE_MANIPULATE)
00336 AST_LIST_INSERT_TAIL(&chan->audiohooks->manipulate_list, audiohook, list);
00337
00338
00339 audiohook->status = AST_AUDIOHOOK_STATUS_RUNNING;
00340
00341 ast_channel_unlock(chan);
00342
00343 return 0;
00344 }
00345
00346
00347
00348
00349
00350 int ast_audiohook_detach(struct ast_audiohook *audiohook)
00351 {
00352 if (audiohook->status == AST_AUDIOHOOK_STATUS_DONE)
00353 return 0;
00354
00355 audiohook->status = AST_AUDIOHOOK_STATUS_SHUTDOWN;
00356
00357 while (audiohook->status != AST_AUDIOHOOK_STATUS_DONE)
00358 ast_audiohook_trigger_wait(audiohook);
00359
00360 return 0;
00361 }
00362
00363
00364
00365
00366
00367 int ast_audiohook_detach_list(struct ast_audiohook_list *audiohook_list)
00368 {
00369 int i = 0;
00370 struct ast_audiohook *audiohook = NULL;
00371
00372
00373 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->spy_list, audiohook, list) {
00374 ast_audiohook_lock(audiohook);
00375 AST_LIST_REMOVE_CURRENT(&audiohook_list->spy_list, list);
00376 audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00377 ast_cond_signal(&audiohook->trigger);
00378 ast_audiohook_unlock(audiohook);
00379 }
00380 AST_LIST_TRAVERSE_SAFE_END
00381
00382
00383 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->whisper_list, audiohook, list) {
00384 ast_audiohook_lock(audiohook);
00385 AST_LIST_REMOVE_CURRENT(&audiohook_list->whisper_list, list);
00386 audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00387 ast_cond_signal(&audiohook->trigger);
00388 ast_audiohook_unlock(audiohook);
00389 }
00390 AST_LIST_TRAVERSE_SAFE_END
00391
00392
00393 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->manipulate_list, audiohook, list) {
00394 ast_audiohook_lock(audiohook);
00395 AST_LIST_REMOVE_CURRENT(&audiohook_list->manipulate_list, list);
00396 audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00397 ast_audiohook_unlock(audiohook);
00398 audiohook->manipulate_callback(audiohook, NULL, NULL, 0);
00399 }
00400 AST_LIST_TRAVERSE_SAFE_END
00401
00402
00403 for (i = 0; i < 2; i++) {
00404 if (audiohook_list->in_translate[i].trans_pvt)
00405 ast_translator_free_path(audiohook_list->in_translate[i].trans_pvt);
00406 if (audiohook_list->out_translate[i].trans_pvt)
00407 ast_translator_free_path(audiohook_list->out_translate[i].trans_pvt);
00408 }
00409
00410
00411 ast_free(audiohook_list);
00412
00413 return 0;
00414 }
00415
00416 static struct ast_audiohook *find_audiohook_by_source(struct ast_audiohook_list *audiohook_list, const char *source)
00417 {
00418 struct ast_audiohook *audiohook = NULL;
00419
00420 AST_LIST_TRAVERSE(&audiohook_list->spy_list, audiohook, list) {
00421 if (!strcasecmp(audiohook->source, source))
00422 return audiohook;
00423 }
00424
00425 AST_LIST_TRAVERSE(&audiohook_list->whisper_list, audiohook, list) {
00426 if (!strcasecmp(audiohook->source, source))
00427 return audiohook;
00428 }
00429
00430 AST_LIST_TRAVERSE(&audiohook_list->manipulate_list, audiohook, list) {
00431 if (!strcasecmp(audiohook->source, source))
00432 return audiohook;
00433 }
00434
00435 return NULL;
00436 }
00437
00438
00439
00440
00441
00442
00443 int ast_audiohook_detach_source(struct ast_channel *chan, const char *source)
00444 {
00445 struct ast_audiohook *audiohook = NULL;
00446
00447 ast_channel_lock(chan);
00448
00449
00450 if (!chan->audiohooks) {
00451 ast_channel_unlock(chan);
00452 return -1;
00453 }
00454
00455 audiohook = find_audiohook_by_source(chan->audiohooks, source);
00456
00457 ast_channel_unlock(chan);
00458
00459 if (audiohook && audiohook->status != AST_AUDIOHOOK_STATUS_DONE)
00460 audiohook->status = AST_AUDIOHOOK_STATUS_SHUTDOWN;
00461
00462 return (audiohook ? 0 : -1);
00463 }
00464
00465
00466
00467
00468
00469
00470
00471
00472 static struct ast_frame *dtmf_audiohook_write_list(struct ast_channel *chan, struct ast_audiohook_list *audiohook_list, enum ast_audiohook_direction direction, struct ast_frame *frame)
00473 {
00474 struct ast_audiohook *audiohook = NULL;
00475
00476 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->manipulate_list, audiohook, list) {
00477 ast_audiohook_lock(audiohook);
00478 if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
00479 AST_LIST_REMOVE_CURRENT(&audiohook_list->manipulate_list, list);
00480 audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00481 ast_audiohook_unlock(audiohook);
00482 audiohook->manipulate_callback(audiohook, NULL, NULL, 0);
00483 continue;
00484 }
00485 if (ast_test_flag(audiohook, AST_AUDIOHOOK_WANTS_DTMF))
00486 audiohook->manipulate_callback(audiohook, chan, frame, direction);
00487 ast_audiohook_unlock(audiohook);
00488 }
00489 AST_LIST_TRAVERSE_SAFE_END
00490
00491 return frame;
00492 }
00493
00494
00495
00496
00497
00498
00499
00500
00501 static struct ast_frame *audio_audiohook_write_list(struct ast_channel *chan, struct ast_audiohook_list *audiohook_list, enum ast_audiohook_direction direction, struct ast_frame *frame)
00502 {
00503 struct ast_audiohook_translate *in_translate = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook_list->in_translate[0] : &audiohook_list->in_translate[1]);
00504 struct ast_audiohook_translate *out_translate = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook_list->out_translate[0] : &audiohook_list->out_translate[1]);
00505 struct ast_frame *start_frame = frame, *middle_frame = frame, *end_frame = frame;
00506 struct ast_audiohook *audiohook = NULL;
00507 int samples = frame->samples;
00508
00509
00510 if (frame->subclass != AST_FORMAT_SLINEAR) {
00511 if (in_translate->format != frame->subclass) {
00512 if (in_translate->trans_pvt)
00513 ast_translator_free_path(in_translate->trans_pvt);
00514 if (!(in_translate->trans_pvt = ast_translator_build_path(AST_FORMAT_SLINEAR, frame->subclass)))
00515 return frame;
00516 in_translate->format = frame->subclass;
00517 }
00518 if (!(middle_frame = ast_translate(in_translate->trans_pvt, frame, 0)))
00519 return frame;
00520 }
00521
00522
00523 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->spy_list, audiohook, list) {
00524 ast_audiohook_lock(audiohook);
00525 if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
00526 AST_LIST_REMOVE_CURRENT(&audiohook_list->spy_list, list);
00527 audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00528 ast_cond_signal(&audiohook->trigger);
00529 ast_audiohook_unlock(audiohook);
00530 continue;
00531 }
00532 ast_audiohook_write_frame(audiohook, direction, middle_frame);
00533 ast_audiohook_unlock(audiohook);
00534 }
00535 AST_LIST_TRAVERSE_SAFE_END
00536
00537
00538 if (direction == AST_AUDIOHOOK_DIRECTION_WRITE && !AST_LIST_EMPTY(&audiohook_list->whisper_list)) {
00539 int i = 0;
00540 short read_buf[samples], combine_buf[samples], *data1 = NULL, *data2 = NULL;
00541 memset(&combine_buf, 0, sizeof(combine_buf));
00542 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->whisper_list, audiohook, list) {
00543 ast_audiohook_lock(audiohook);
00544 if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
00545 AST_LIST_REMOVE_CURRENT(&audiohook_list->whisper_list, list);
00546 audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00547 ast_cond_signal(&audiohook->trigger);
00548 ast_audiohook_unlock(audiohook);
00549 continue;
00550 }
00551 if (ast_slinfactory_available(&audiohook->write_factory) >= samples && ast_slinfactory_read(&audiohook->write_factory, read_buf, samples)) {
00552
00553 for (i = 0, data1 = combine_buf, data2 = read_buf; i < samples; i++, data1++, data2++)
00554 ast_slinear_saturated_add(data1, data2);
00555 }
00556 ast_audiohook_unlock(audiohook);
00557 }
00558 AST_LIST_TRAVERSE_SAFE_END
00559
00560 for (i = 0, data1 = middle_frame->data, data2 = combine_buf; i < samples; i++, data1++, data2++)
00561 ast_slinear_saturated_add(data1, data2);
00562 end_frame = middle_frame;
00563 }
00564
00565
00566 if (!AST_LIST_EMPTY(&audiohook_list->manipulate_list)) {
00567 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->manipulate_list, audiohook, list) {
00568 ast_audiohook_lock(audiohook);
00569 if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
00570 AST_LIST_REMOVE_CURRENT(&audiohook_list->manipulate_list, list);
00571 audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00572 ast_audiohook_unlock(audiohook);
00573
00574 audiohook->manipulate_callback(audiohook, chan, NULL, direction);
00575 continue;
00576 }
00577
00578 audiohook->manipulate_callback(audiohook, chan, middle_frame, direction);
00579 ast_audiohook_unlock(audiohook);
00580 }
00581 AST_LIST_TRAVERSE_SAFE_END
00582 end_frame = middle_frame;
00583 }
00584
00585
00586 if (middle_frame == end_frame) {
00587
00588 if (end_frame->subclass != start_frame->subclass) {
00589 if (out_translate->format != start_frame->subclass) {
00590 if (out_translate->trans_pvt)
00591 ast_translator_free_path(out_translate->trans_pvt);
00592 if (!(out_translate->trans_pvt = ast_translator_build_path(start_frame->subclass, AST_FORMAT_SLINEAR))) {
00593
00594 ast_frfree(middle_frame);
00595 return start_frame;
00596 }
00597 out_translate->format = start_frame->subclass;
00598 }
00599
00600 if (!(end_frame = ast_translate(out_translate->trans_pvt, middle_frame, 0))) {
00601
00602 ast_frfree(middle_frame);
00603 return start_frame;
00604 }
00605
00606 ast_frfree(middle_frame);
00607 }
00608 } else {
00609
00610 ast_frfree(middle_frame);
00611 }
00612
00613 return end_frame;
00614 }
00615
00616
00617
00618
00619
00620
00621
00622
00623 struct ast_frame *ast_audiohook_write_list(struct ast_channel *chan, struct ast_audiohook_list *audiohook_list, enum ast_audiohook_direction direction, struct ast_frame *frame)
00624 {
00625
00626 if (frame->frametype == AST_FRAME_VOICE)
00627 return audio_audiohook_write_list(chan, audiohook_list, direction, frame);
00628 else if (frame->frametype == AST_FRAME_DTMF)
00629 return dtmf_audiohook_write_list(chan, audiohook_list, direction, frame);
00630 else
00631 return frame;
00632 }
00633
00634
00635
00636
00637
00638 void ast_audiohook_trigger_wait(struct ast_audiohook *audiohook)
00639 {
00640 struct timeval tv;
00641 struct timespec ts;
00642
00643 tv = ast_tvadd(ast_tvnow(), ast_samp2tv(50000, 1000));
00644 ts.tv_sec = tv.tv_sec;
00645 ts.tv_nsec = tv.tv_usec * 1000;
00646
00647 ast_cond_timedwait(&audiohook->trigger, &audiohook->lock, &ts);
00648
00649 return;
00650 }