Implement adaptive target delay extension

media/cast/cast_sender_impl.cc

Index: media/cast/cast_sender_impl.cc
diff --git a/media/cast/cast_sender_impl.cc b/media/cast/cast_sender_impl.cc
index 9a4ef3105a5a1f3314f4a4671836aaf59a52acfe..19a054f513f99cfe4639aa7d8e1ebd8e07057cb1 100644
--- a/media/cast/cast_sender_impl.cc
+++ b/media/cast/cast_sender_impl.cc
@@ -110,6 +110,10 @@ void CastSenderImpl::InitializeAudio(
         new LocalAudioFrameInput(cast_environment_, audio_sender_->AsWeakPtr());
   }
   cast_initialization_cb.Run(status);
+  if (video_sender_) {
+    DCHECK(audio_sender_->GetTargetPlayoutDelay() ==
+           video_sender_->GetTargetPlayoutDelay());
+  }
 }
 
 void CastSenderImpl::InitializeVideo(
@@ -136,6 +140,10 @@ void CastSenderImpl::InitializeVideo(
         new LocalVideoFrameInput(cast_environment_, video_sender_->AsWeakPtr());
   }
   cast_initialization_cb.Run(status);
+  if (audio_sender_) {
+    DCHECK(audio_sender_->GetTargetPlayoutDelay() ==
+           video_sender_->GetTargetPlayoutDelay());
+  }
 }
 
 CastSenderImpl::~CastSenderImpl() {
@@ -150,5 +158,17 @@ scoped_refptr<VideoFrameInput> CastSenderImpl::video_frame_input() {
   return video_frame_input_;
 }
 
+void CastSenderImpl::SetTargetPlayoutDelay(
+    base::TimeDelta new_target_playout_delay) {
+  VLOG(1) << "CastSenderImpl@" << this << "::SetTargetPlayoutDelay("
+          << new_target_playout_delay.InMilliseconds() << " ms)";
+  if (audio_sender_) {
+    audio_sender_->SetTargetPlayoutDelay(new_target_playout_delay);
+  }
+  if (video_sender_) {
+    video_sender_->SetTargetPlayoutDelay(new_target_playout_delay);
+  }
+}
+
 }  // namespace cast
 }  // namespace media