Add sender controlled playout delay limits

webrtc/modules/video_coding/receiver.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 126 matching lines @@
 void VCMReceiver::TriggerDecoderShutdown() {
   jitter_buffer_.Stop();
   render_wait_event_->Set();
 }
 
 VCMEncodedFrame* VCMReceiver::FrameForDecoding(uint16_t max_wait_time_ms,
                                                int64_t* next_render_time_ms,
                                                bool prefer_late_decoding) {
   const int64_t start_time_ms = clock_->TimeInMilliseconds();
   uint32_t frame_timestamp = 0;
+  int min_playout_delay_ms = -1;
+  int max_playout_delay_ms = -1;
   // Exhaust wait time to get a complete frame for decoding.
-  bool found_frame =
-      jitter_buffer_.NextCompleteTimestamp(max_wait_time_ms, &frame_timestamp);
+  VCMEncodedFrame* found_frame =
+      jitter_buffer_.NextCompleteFrame(max_wait_time_ms);
 
-  if (!found_frame)
-    found_frame = jitter_buffer_.NextMaybeIncompleteTimestamp(&frame_timestamp);
+  if (found_frame) {
+    frame_timestamp = found_frame->TimeStamp();
+    min_playout_delay_ms = found_frame->EncodedImage().playout_delay_.min_ms;
+    max_playout_delay_ms = found_frame->EncodedImage().playout_delay_.max_ms;
+  } else {
+    if (!jitter_buffer_.NextMaybeIncompleteTimestamp(&frame_timestamp))
+      return nullptr;
+  }
 
-  if (!found_frame)
-    return NULL;
+  if (min_playout_delay_ms >= 0)
+    timing_->set_min_playout_delay(min_playout_delay_ms);
+
+  if (max_playout_delay_ms >= 0)
+    timing_->set_max_playout_delay(max_playout_delay_ms);
 
   // We have a frame - Set timing and render timestamp.
   timing_->SetJitterDelay(jitter_buffer_.EstimatedJitterMs());
   const int64_t now_ms = clock_->TimeInMilliseconds();
   timing_->UpdateCurrentDelay(frame_timestamp);
   *next_render_time_ms = timing_->RenderTimeMs(frame_timestamp, now_ms);
   // Check render timing.
   bool timing_error = false;
   // Assume that render timing errors are due to changes in the video stream.
   if (*next_render_time_ms < 0) {
@@ skipping 119 matching lines @@
   timing_->set_min_playout_delay(desired_delay_ms);
   return 0;
 }
 
 void VCMReceiver::RegisterStatsCallback(
     VCMReceiveStatisticsCallback* callback) {
   jitter_buffer_.RegisterStatsCallback(callback);
 }
 
 }  // namespace webrtc