Asterisk - The Open Source Telephony Project  GIT-master-a1fa8df
test_res_rtp.c
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1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 2019, Sangoma, Inc.
5  *
6  * Ben Ford <bford@sangoma.com>
7  *
8  * See http://www.asterisk.org for more information about
9  * the Asterisk project. Please do not directly contact
10  * any of the maintainers of this project for assistance;
11  * the project provides a web site, mailing lists and IRC
12  * channels for your use.
13  *
14  * This program is free software, distributed under the terms of
15  * the GNU General Public License Version 2. See the LICENSE file
16  * at the top of the source tree.
17  */
18 
19 /*!
20  * \file
21  * \brief RTP/RTCP Unit Tests
22  *
23  * \author Ben Ford <bford@digium.com>
24  *
25  */
26 
27 /*** MODULEINFO
28  <depend>TEST_FRAMEWORK</depend>
29  <support_level>core</support_level>
30  ***/
31 
32 #include "asterisk.h"
33 
34 #include "asterisk/module.h"
35 #include "asterisk/test.h"
36 #include "asterisk/rtp_engine.h"
37 #include "asterisk/data_buffer.h"
38 #include "asterisk/format_cache.h"
39 
40 enum test_type {
41  TEST_TYPE_NONE = 0, /* No special setup required */
42  TEST_TYPE_NACK, /* Enable NACK */
43  TEST_TYPE_REMB, /* Enable REMB */
44 };
45 
47 {
48  if (sched) {
50  }
51 }
52 
53 static int test_init_rtp_instances(struct ast_rtp_instance **instance1,
54  struct ast_rtp_instance **instance2, struct ast_sched_context *test_sched,
55  enum test_type type)
56 {
57  struct ast_sockaddr addr;
58 
59  ast_sockaddr_parse(&addr, "127.0.0.1", 0);
60 
61  *instance1 = ast_rtp_instance_new("asterisk", test_sched, &addr, NULL);
62  *instance2 = ast_rtp_instance_new("asterisk", test_sched, &addr, NULL);
63  if (!instance1 || !instance2) {
64  return -1;
65  }
66 
69 
70  if (type == TEST_TYPE_NACK) {
75  } else if (type == TEST_TYPE_REMB) {
78  }
79 
80  ast_rtp_instance_get_local_address(*instance1, &addr);
81  ast_rtp_instance_set_remote_address(*instance2, &addr);
82 
83  ast_rtp_instance_get_local_address(*instance2, &addr);
84  ast_rtp_instance_set_remote_address(*instance1, &addr);
85 
86  ast_rtp_instance_reset_test_engine(*instance1);
87 
88  ast_rtp_instance_activate(*instance1);
89  ast_rtp_instance_activate(*instance2);
90 
91  return 0;
92 }
93 
94 static void test_write_frames(struct ast_rtp_instance *instance, int seqno, int num)
95 {
96  char data[320] = "";
97  struct ast_frame frame_out = {
99  .subclass.format = ast_format_ulaw,
100  .data.ptr = data,
101  .datalen = 160,
102  };
103  int index;
104 
106 
107  for (index = 0; index < num; index++) {
108  frame_out.seqno = seqno + index;
109  ast_rtp_instance_write(instance, &frame_out);
110  }
111 }
112 
113 static void test_read_frames(struct ast_rtp_instance *instance, int num)
114 {
115  struct ast_frame *frame_in;
116  int index;
117 
118  for (index = 0; index < num; index++) {
119  frame_in = ast_rtp_instance_read(instance, 0);
120  if (frame_in) {
121  ast_frfree(frame_in);
122  }
123  }
124 }
125 
126 static void test_write_and_read_frames(struct ast_rtp_instance *instance1,
127  struct ast_rtp_instance *instance2, int seqno, int num)
128 {
129  test_write_frames(instance1, seqno, num);
130  test_read_frames(instance2, num);
131 }
132 
133 AST_TEST_DEFINE(nack_no_packet_loss)
134 {
138 
139  switch (cmd) {
140  case TEST_INIT:
141  info->name = "nack_no_packet_loss";
142  info->category = "/res/res_rtp/";
143  info->summary = "nack no packet loss unit test";
144  info->description =
145  "Tests sending packets with no packet loss and "
146  "validates that the send buffer stores sent packets "
147  "and the receive buffer is empty";
148  return AST_TEST_NOT_RUN;
149  case TEST_EXECUTE:
150  break;
151  }
152 
153  test_sched = ast_sched_context_create();
154 
155  if ((test_init_rtp_instances(&instance1, &instance2, test_sched, TEST_TYPE_NACK)) < 0) {
156  ast_log(LOG_ERROR, "Failed to initialize test!\n");
157  return AST_TEST_FAIL;
158  }
159 
160  test_write_and_read_frames(instance1, instance2, 1000, 10);
161 
162  ast_test_validate(test, ast_rtp_instance_get_send_buffer_count(instance1) == 10,
163  "Send buffer did not have the expected count of 10");
164 
165  ast_test_validate(test, ast_rtp_instance_get_recv_buffer_count(instance2) == 0,
166  "Receive buffer did not have the expected count of 0");
167 
168  return AST_TEST_PASS;
169 }
170 
171 AST_TEST_DEFINE(nack_nominal)
172 {
176 
177  switch (cmd) {
178  case TEST_INIT:
179  info->name = "nack_nominal";
180  info->category = "/res/res_rtp/";
181  info->summary = "nack nominal unit test";
182  info->description =
183  "Tests sending packets with some packet loss and "
184  "validates that a NACK request is sent on reaching "
185  "the triggering amount of lost packets";
186  return AST_TEST_NOT_RUN;
187  case TEST_EXECUTE:
188  break;
189  }
190 
191  test_sched = ast_sched_context_create();
192 
193  if ((test_init_rtp_instances(&instance1, &instance2, test_sched, TEST_TYPE_NACK)) < 0) {
194  ast_log(LOG_ERROR, "Failed to initialize test!\n");
195  return AST_TEST_FAIL;
196  }
197 
198  /* Start normally */
199  test_write_and_read_frames(instance1, instance2, 1000, 10);
200 
201  /* Set the number of packets to drop when we send them next */
202  ast_rtp_instance_drop_packets(instance2, 10);
203  test_write_and_read_frames(instance1, instance2, 1010, 10);
204 
205  /* Send enough packets to reach the NACK trigger */
206  test_write_and_read_frames(instance1, instance2, 1020, ast_rtp_instance_get_recv_buffer_max(instance2) / 2);
207 
208  /* This needs to be read as RTCP */
209  test_read_frames(instance1, 1);
210 
211  /* We should have the missing packets to read now */
212  test_read_frames(instance2, 10);
213 
214  ast_test_validate(test, ast_rtp_instance_get_recv_buffer_count(instance2) == 0,
215  "Receive buffer did not have the expected count of 0");
216 
217  return AST_TEST_PASS;
218 }
219 
220 AST_TEST_DEFINE(nack_overflow)
221 {
225  int max_packets;
226 
227  switch (cmd) {
228  case TEST_INIT:
229  info->name = "nack_overflow";
230  info->category = "/res/res_rtp/";
231  info->summary = "nack overflow unit test";
232  info->description =
233  "Tests that when the buffer hits its capacity, we "
234  "queue all the packets we currently have stored";
235  return AST_TEST_NOT_RUN;
236  case TEST_EXECUTE:
237  break;
238  }
239 
240  test_sched = ast_sched_context_create();
241 
242  if ((test_init_rtp_instances(&instance1, &instance2, test_sched, TEST_TYPE_NACK)) < 0) {
243  ast_log(LOG_ERROR, "Failed to initialize test!\n");
244  return AST_TEST_FAIL;
245  }
246 
247  /* Start normally */
248  test_write_and_read_frames(instance1, instance2, 1000, 10);
249 
250  /* Send enough packets to fill the buffer */
251  max_packets = ast_rtp_instance_get_recv_buffer_max(instance2);
252  test_write_and_read_frames(instance1, instance2, 1020, max_packets);
253 
254  ast_test_validate(test, ast_rtp_instance_get_recv_buffer_count(instance2) == max_packets,
255  "Receive buffer did not have the expected count of max buffer size");
256 
257  /* Send the packet that will overflow the buffer */
258  test_write_and_read_frames(instance1, instance2, 1020 + max_packets, 1);
259 
260  ast_test_validate(test, ast_rtp_instance_get_recv_buffer_count(instance2) == 0,
261  "Receive buffer did not have the expected count of 0");
262 
263  return AST_TEST_PASS;
264 }
265 
266 AST_TEST_DEFINE(lost_packet_stats_nominal)
267 {
271  struct ast_rtp_instance_stats stats = { 0, };
273 
274  switch (cmd) {
275  case TEST_INIT:
276  info->name = "lost_packet_stats_nominal";
277  info->category = "/res/res_rtp/";
278  info->summary = "lost packet stats nominal unit test";
279  info->description =
280  "Tests that when some packets are lost, we calculate that "
281  "loss correctly when doing lost packet statistics";
282  return AST_TEST_NOT_RUN;
283  case TEST_EXECUTE:
284  break;
285  }
286 
287  test_sched = ast_sched_context_create();
288 
289  if ((test_init_rtp_instances(&instance1, &instance2, test_sched, TEST_TYPE_NONE)) < 0) {
290  ast_log(LOG_ERROR, "Failed to initialize test!\n");
291  return AST_TEST_FAIL;
292  }
293 
294  /* Start normally */
295  test_write_and_read_frames(instance1, instance2, 1000, 10);
296 
297  /* Send some more packets, but with a gap */
298  test_write_and_read_frames(instance1, instance2, 1015, 5);
299 
300  /* Send a RR to calculate lost packet statistics. We should be missing 5 packets */
301  ast_rtp_instance_queue_report(instance1);
302  test_write_frames(instance2, 1000, 1);
303 
304  /* Check RTCP stats to see if we got the expected packet loss count */
305  ast_rtp_instance_get_stats(instance2, &stats, stat);
306  ast_test_validate(test, stats.rxploss == 5 && stats.local_minrxploss == 5 &&
307  stats.local_maxrxploss == 5, "Condition of 5 lost packets was not met");
308 
309  /* Drop 3 before writing 5 more */
310  test_write_and_read_frames(instance1, instance2, 1023, 5);
311 
312  ast_rtp_instance_queue_report(instance1);
313  test_write_frames(instance2, 1001, 1);
314  ast_rtp_instance_get_stats(instance2, &stats, stat);
315 
316  /* Should now be missing 8 total packets with a change in min */
317  ast_test_validate(test, stats.rxploss == 8 && stats.local_minrxploss == 3 &&
318  stats.local_maxrxploss == 5);
319 
320  /* Write 5 more with no gaps */
321  test_write_and_read_frames(instance1, instance2, 1028, 5);
322 
323  ast_rtp_instance_queue_report(instance1);
324  test_write_frames(instance2, 1002, 1);
325  ast_rtp_instance_get_stats(instance2, &stats, stat);
326 
327  /* Should still only be missing 8 total packets */
328  ast_test_validate(test, stats.rxploss == 8 && stats.local_minrxploss == 3 &&
329  stats.local_maxrxploss == 5);
330 
331  /* Now drop 1, write another 5, drop 8, and then write 5 */
332  test_write_and_read_frames(instance1, instance2, 1034, 5);
333  test_write_and_read_frames(instance1, instance2, 1047, 5);
334 
335  ast_rtp_instance_queue_report(instance1);
336  test_write_frames(instance2, 1003, 1);
337  ast_rtp_instance_get_stats(instance2, &stats, stat);
338 
339  /* Now it should be missing 17 total packets, with a change in max */
340  ast_test_validate(test, stats.rxploss == 17 && stats.local_minrxploss == 3 &&
341  stats.local_maxrxploss == 9);
342 
343  return AST_TEST_PASS;
344 }
345 
346 AST_TEST_DEFINE(remb_nominal)
347 {
351  RAII_VAR(struct ast_frame *, frame_in, NULL, ast_frfree);
352  /* Use the structure softmix_remb_collector uses to store information for REMB */
353  struct ast_rtp_rtcp_feedback feedback = {
355  .remb.br_exp = 0,
356  .remb.br_mantissa = 1000,
357  };
358  struct ast_frame frame_out = {
360  .subclass.integer = AST_RTP_RTCP_PSFB,
361  .data.ptr = &feedback,
362  .datalen = sizeof(feedback),
363  };
364  struct ast_rtp_rtcp_feedback *received_feedback;
365 
366  switch (cmd) {
367  case TEST_INIT:
368  info->name = "remb_nominal";
369  info->category = "/res/res_rtp/";
370  info->summary = "remb nominal unit test";
371  info->description =
372  "Tests sending and receiving a REMB packet";
373  return AST_TEST_NOT_RUN;
374  case TEST_EXECUTE:
375  break;
376  }
377 
378  test_sched = ast_sched_context_create();
379 
380  if ((test_init_rtp_instances(&instance1, &instance2, test_sched, TEST_TYPE_REMB)) < 0) {
381  ast_log(LOG_ERROR, "Failed to initialize test!\n");
382  return AST_TEST_FAIL;
383  }
384 
385  /* The schedid must be 0 or greater, so let's do that now */
386  ast_rtp_instance_set_schedid(instance1, 0);
387 
388  ast_rtp_instance_write(instance1, &frame_out);
389 
390  /* Verify the high level aspects of the frame */
391  frame_in = ast_rtp_instance_read(instance2, 0);
392  ast_test_validate(test, frame_in != NULL, "Did not receive a REMB frame");
393  ast_test_validate(test, frame_in->frametype == AST_FRAME_RTCP,
394  "REMB frame did not have the expected frametype");
395  ast_test_validate(test, frame_in->subclass.integer == AST_RTP_RTCP_PSFB,
396  "REMB frame did not have the expected subclass integer");
397 
398  /* Verify the actual REMB information itself */
399  received_feedback = frame_in->data.ptr;
400  ast_test_validate(test, received_feedback->fmt == AST_RTP_RTCP_FMT_REMB,
401  "REMB frame did not have the expected feedback format");
402  ast_test_validate(test, received_feedback->remb.br_exp == feedback.remb.br_exp,
403  "REMB received exponent did not match sent exponent");
404  ast_test_validate(test, received_feedback->remb.br_mantissa == feedback.remb.br_mantissa,
405  "REMB received mantissa did not match sent mantissa");
406 
407  return AST_TEST_PASS;
408 }
409 
410 AST_TEST_DEFINE(sr_rr_nominal)
411 {
415  RAII_VAR(struct ast_frame *, frame_in, NULL, ast_frfree);
416 
417  switch (cmd) {
418  case TEST_INIT:
419  info->name = "sr_rr_nominal";
420  info->category = "/res/res_rtp/";
421  info->summary = "SR/RR nominal unit test";
422  info->description =
423  "Tests sending SR/RR and receiving it; includes SDES";
424  return AST_TEST_NOT_RUN;
425  case TEST_EXECUTE:
426  break;
427  }
428 
429  test_sched = ast_sched_context_create();
430 
431  if ((test_init_rtp_instances(&instance1, &instance2, test_sched, TEST_TYPE_NONE)) < 0) {
432  ast_log(LOG_ERROR, "Failed to initialize test!\n");
433  return AST_TEST_FAIL;
434  }
435 
436  test_write_and_read_frames(instance1, instance2, 1000, 10);
437 
438  /*
439  * Set the send_report flag so we send a sender report instead of normal RTP. We
440  * also need to ensure that SDES processed.
441  */
442  ast_rtp_instance_queue_report(instance1);
443  test_write_frames(instance1, 1010, 1);
444 
445  frame_in = ast_rtp_instance_read(instance2, 0);
446  ast_test_validate(test, frame_in->frametype == AST_FRAME_RTCP,
447  "Sender report frame did not have the expected frametype");
448  ast_test_validate(test, frame_in->subclass.integer == AST_RTP_RTCP_SR,
449  "Sender report frame did not have the expected subclass integer");
450  ast_test_validate(test, ast_rtp_instance_get_sdes_received(instance2) == 1,
451  "SDES was never processed for sender report");
452 
453  ast_frfree(frame_in);
454 
455  /* Set the send_report flag so we send a receiver report instead of normal RTP */
456  ast_rtp_instance_queue_report(instance1);
457  test_write_frames(instance1, 1010, 1);
458 
459  frame_in = ast_rtp_instance_read(instance2, 0);
460  ast_test_validate(test, frame_in->frametype == AST_FRAME_RTCP,
461  "Receiver report frame did not have the expected frametype");
462  ast_test_validate(test, frame_in->subclass.integer == AST_RTP_RTCP_RR,
463  "Receiver report frame did not have the expected subclass integer");
464 
465  return AST_TEST_PASS;
466 }
467 
468 AST_TEST_DEFINE(fir_nominal)
469 {
473  RAII_VAR(struct ast_frame *, frame_in, NULL, ast_frfree);
474  struct ast_frame frame_out = {
476  .subclass.integer = AST_CONTROL_VIDUPDATE,
477  };
478 
479  switch (cmd) {
480  case TEST_INIT:
481  info->name = "fir_nominal";
482  info->category = "/res/res_rtp/";
483  info->summary = "fir nominal unit test";
484  info->description =
485  "Tests sending and receiving a FIR packet";
486  return AST_TEST_NOT_RUN;
487  case TEST_EXECUTE:
488  break;
489  }
490 
491  test_sched = ast_sched_context_create();
492 
493  if ((test_init_rtp_instances(&instance1, &instance2, test_sched, TEST_TYPE_NONE)) < 0) {
494  ast_log(LOG_ERROR, "Failed to initialize test!\n");
495  return AST_TEST_FAIL;
496  }
497 
498  /* Send some packets to learn SSRC */
499  test_write_and_read_frames(instance2, instance1, 1000, 10);
500 
501  /* The schedid must be 0 or greater, so let's do that now */
502  ast_rtp_instance_set_schedid(instance1, 0);
503 
504  /*
505  * This will not directly write a frame out, but cause Asterisk to see it as a FIR
506  * request, which will then trigger rtp_write_rtcp_fir, which will send out the
507  * appropriate packet.
508  */
509  ast_rtp_instance_write(instance1, &frame_out);
510 
511  /*
512  * We only receive one frame, the FIR request. It won't have a subclass integer of
513  * 206 (PSFB) because ast_rtcp_interpret sets it to 18 (AST_CONTROL_VIDUPDATE), so
514  * check for that.
515  */
516  frame_in = ast_rtp_instance_read(instance2, 0);
517  ast_test_validate(test, frame_in != NULL, "Did not receive a FIR frame");
518  ast_test_validate(test, frame_in->frametype == AST_FRAME_CONTROL,
519  "FIR frame did not have the expected frametype");
520  ast_test_validate(test, frame_in->subclass.integer == AST_CONTROL_VIDUPDATE,
521  "FIR frame did not have the expected subclass integer");
522 
523  return AST_TEST_PASS;
524 }
525 
526 static int unload_module(void)
527 {
528  AST_TEST_UNREGISTER(nack_no_packet_loss);
529  AST_TEST_UNREGISTER(nack_nominal);
530  AST_TEST_UNREGISTER(nack_overflow);
531  AST_TEST_UNREGISTER(lost_packet_stats_nominal);
532  AST_TEST_UNREGISTER(remb_nominal);
533  AST_TEST_UNREGISTER(sr_rr_nominal);
534  AST_TEST_UNREGISTER(fir_nominal);
535  return 0;
536 }
537 
538 static int load_module(void)
539 {
540  AST_TEST_REGISTER(nack_no_packet_loss);
541  AST_TEST_REGISTER(nack_nominal);
542  AST_TEST_REGISTER(nack_overflow);
543  AST_TEST_REGISTER(lost_packet_stats_nominal);
544  AST_TEST_REGISTER(remb_nominal);
545  AST_TEST_REGISTER(sr_rr_nominal);
546  AST_TEST_REGISTER(fir_nominal);
548 }
549 
static const char type[]
Definition: chan_ooh323.c:109
int ast_rtp_instance_activate(struct ast_rtp_instance *instance)
Indicate to the RTP engine that packets are now expected to be sent/received on the RTP instance...
Definition: rtp_engine.c:2647
#define AST_MODULE_INFO_STANDARD(keystr, desc)
Definition: module.h:567
Asterisk main include file. File version handling, generic pbx functions.
static int test_init_rtp_instances(struct ast_rtp_instance **instance1, struct ast_rtp_instance **instance2, struct ast_sched_context *test_sched, enum test_type type)
Definition: test_res_rtp.c:53
Data Buffer API.
int ast_rtp_instance_get_stats(struct ast_rtp_instance *instance, struct ast_rtp_instance_stats *stats, enum ast_rtp_instance_stat stat)
Retrieve statistics about an RTP instance.
Definition: rtp_engine.c:2446
int ast_sockaddr_parse(struct ast_sockaddr *addr, const char *str, int flags)
Parse an IPv4 or IPv6 address string.
Definition: netsock2.c:230
#define ast_set_flag(p, flag)
Definition: utils.h:70
struct ast_format * ast_format_ulaw
Built-in cached ulaw format.
Definition: format_cache.c:86
int ast_rtp_instance_write(struct ast_rtp_instance *instance, struct ast_frame *frame)
Send a frame out over RTP.
Definition: rtp_engine.c:568
An object that represents data received in a feedback report.
Definition: rtp_engine.h:358
Test Framework API.
static void test_write_and_read_frames(struct ast_rtp_instance *instance1, struct ast_rtp_instance *instance2, int seqno, int num)
Definition: test_res_rtp.c:126
static int load_module(void)
Definition: test_res_rtp.c:538
Definition: sched.c:76
#define AST_TEST_REGISTER(cb)
Definition: test.h:127
unsigned int rxploss
Definition: rtp_engine.h:394
static void test_write_frames(struct ast_rtp_instance *instance, int seqno, int num)
Definition: test_res_rtp.c:94
static void test_read_frames(struct ast_rtp_instance *instance, int num)
Definition: test_res_rtp.c:113
unsigned int fmt
Definition: rtp_engine.h:359
struct ast_rtp_rtcp_feedback_remb remb
Definition: rtp_engine.h:361
test_type
Definition: test_res_rtp.c:40
#define NULL
Definition: resample.c:96
static void ast_sched_context_destroy_wrapper(struct ast_sched_context *sched)
Definition: test_res_rtp.c:46
Socket address structure.
Definition: netsock2.h:97
#define ast_log
Definition: astobj2.c:42
ast_rtp_instance_stat
Definition: rtp_engine.h:180
#define RAII_VAR(vartype, varname, initval, dtor)
Declare a variable that will call a destructor function when it goes out of scope.
Definition: utils.h:911
union ast_frame::@250 data
struct ast_sched_context * ast_sched_context_create(void)
Create a scheduler context.
Definition: sched.c:236
#define LOG_ERROR
Definition: logger.h:285
#define AST_TEST_UNREGISTER(cb)
Definition: test.h:128
#define ast_rtp_instance_set_remote_address(instance, address)
Set the address of the remote endpoint that we are sending RTP to.
Definition: rtp_engine.h:1080
def info(msg)
void ast_rtp_instance_get_local_address(struct ast_rtp_instance *instance, struct ast_sockaddr *address)
Get the local address that we are expecting RTP on.
Definition: rtp_engine.c:643
int ast_rtp_instance_destroy(struct ast_rtp_instance *instance)
Destroy an RTP instance.
Definition: rtp_engine.c:458
#define AST_RTP_RTCP_RR
Definition: rtp_engine.h:295
static int unload_module(void)
Definition: test_res_rtp.c:526
#define AST_RTP_RTCP_SR
Definition: rtp_engine.h:293
#define ast_frfree(fr)
Data structure associated with a single frame of data.
AST_TEST_DEFINE(nack_no_packet_loss)
Definition: test_res_rtp.c:133
#define AST_RTP_RTCP_PSFB
Definition: rtp_engine.h:299
void ast_rtp_instance_set_prop(struct ast_rtp_instance *instance, enum ast_rtp_property property, int value)
Set the value of an RTP instance property.
Definition: rtp_engine.c:705
enum ast_frame_type frametype
struct ast_rtp_instance * ast_rtp_instance_new(const char *engine_name, struct ast_sched_context *sched, const struct ast_sockaddr *sa, void *data)
Create a new RTP instance.
Definition: rtp_engine.c:465
#define ASTERISK_GPL_KEY
The text the key() function should return.
Definition: module.h:46
Pluggable RTP Architecture.
Asterisk module definitions.
void ast_sched_context_destroy(struct ast_sched_context *c)
destroys a schedule context
Definition: sched.c:269
struct ast_frame * ast_rtp_instance_read(struct ast_rtp_instance *instance, int rtcp)
Receive a frame over RTP.
Definition: rtp_engine.c:578
Media Format Cache API.
#define AST_RTP_RTCP_FMT_REMB
Definition: rtp_engine.h:309