Bug 1300677 - Implement SetSeekThreshold for RemoteVideoDecoder. r=dvander

dom/media/ipc/PVideoDecoder.ipdl

@@ -54,6 +54,8 @@ parent:
   async Drain();
   async Shutdown();
 
+  async SetSeekThreshold(int64_t time);
+
   async __delete__();
 
 child:

dom/media/ipc/RemoteVideoDecoder.cpp

@@ -102,6 +102,19 @@ RemoteVideoDecoder::Shutdown()
   }), NS_DISPATCH_NORMAL);
 }
 
+void
+RemoteVideoDecoder::SetSeekThreshold(const media::TimeUnit& aTime)
+{
+  MOZ_ASSERT(mCallback->OnReaderTaskQueue());
+  RefPtr<RemoteVideoDecoder> self = this;
+  media::TimeUnit time = aTime;
+  VideoDecoderManagerChild::GetManagerThread()->Dispatch(NS_NewRunnableFunction([=]() {
+    MOZ_ASSERT(self->mActor);
+    self->mActor->SetSeekThreshold(time);
+  }), NS_DISPATCH_NORMAL);
+
+}
+
 nsresult
 RemoteDecoderModule::Startup()
 {

dom/media/ipc/RemoteVideoDecoder.h

@@ -32,6 +32,7 @@ public:
   void Flush() override;
   void Drain() override;
   void Shutdown() override;
+  void SetSeekThreshold(const media::TimeUnit& aTime) override;
 
   const char* GetDescriptionName() const override { return "RemoteVideoDecoder"; }
 

dom/media/ipc/VideoDecoderChild.cpp

@@ -209,6 +209,15 @@ VideoDecoderChild::Shutdown()
   mInitialized = false;
 }
 
+void
+VideoDecoderChild::SetSeekThreshold(const media::TimeUnit& aTime)
+{
+  AssertOnManagerThread();
+  if (!mCanSend || !SendSetSeekThreshold(aTime.ToMicroseconds())) {
+    mCallback->Error(NS_ERROR_DOM_MEDIA_FATAL_ERR);
+  }
+}
+
 void
 VideoDecoderChild::AssertOnManagerThread()
 {

dom/media/ipc/VideoDecoderChild.h

@@ -39,6 +39,7 @@ public:
   void Flush();
   void Drain();
   void Shutdown();
+  void SetSeekThreshold(const media::TimeUnit& aTime);
 
   MOZ_IS_CLASS_INIT
   void InitIPDL(MediaDataDecoderCallback* aCallback,

dom/media/ipc/VideoDecoderParent.cpp

@@ -135,6 +135,14 @@ VideoDecoderParent::RecvShutdown()
   return true;
 }
 
+bool
+VideoDecoderParent::RecvSetSeekThreshold(const int64_t& aTime)
+{
+  MOZ_ASSERT(!mDestroyed);
+  mDecoder->SetSeekThreshold(media::TimeUnit::FromMicroseconds(aTime));
+  return true;
+}
+
 void
 VideoDecoderParent::ActorDestroy(ActorDestroyReason aWhy)
 {

dom/media/ipc/VideoDecoderParent.h

@@ -35,6 +35,7 @@ public:
   bool RecvFlush() override;
   bool RecvDrain() override;
   bool RecvShutdown() override;
+  bool RecvSetSeekThreshold(const int64_t& aTime) override;
 
   void ActorDestroy(ActorDestroyReason aWhy) override;