Cast: Enable high-resolution timers while casting.

chrome/renderer/media/cast_receiver_session_delegate.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/media/cast_receiver_session_delegate.h"
 
 #include "base/synchronization/waitable_event.h"
+#include "base/time/time.h"
 #include "base/values.h"
 
 CastReceiverSessionDelegate::CastReceiverSessionDelegate()
     : weak_factory_(this) {
+#if defined(OS_WIN)
+  base::Time::ActivateHighResolutionTimer(true);

[miu, 2015/05/07 02:58:00]

Consider adding a LOG(WARNING) message if this function returns false.

[miu, 2015/05/07 02:58:00]

Also, should all these code changes go in CastSessionDelegateBase so that both a
sender and receiver gets high-res timers?  Or, did you evaluate that the sender
doesn't need high-res timers?

[hubbe, 2015/05/07 19:16:50]

No thinking, I just put it in the wrong place. :)

[hubbe, 2015/05/07 19:16:50]

Done.

+#endif
 }
-CastReceiverSessionDelegate::~CastReceiverSessionDelegate() {}
+CastReceiverSessionDelegate::~CastReceiverSessionDelegate() {
+#if defined(OS_WIN)
+  base::Time::ActivateHighResolutionTimer(false);
+#endif
+}
 
 void CastReceiverSessionDelegate::LogRawEvents(
     const std::vector<media::cast::PacketEvent>& packet_events,
     const std::vector<media::cast::FrameEvent>& frame_events) {
   NOTREACHED();
 }
 
 void CastReceiverSessionDelegate::Start(
     const media::cast::FrameReceiverConfig& audio_config,
     const media::cast::FrameReceiverConfig& video_config,
@@ skipping 70 matching lines @@
 
 void CastReceiverSessionDelegate::OnDecodedVideoFrame(
     const scoped_refptr<media::VideoFrame>& video_frame,
     const base::TimeTicks& playout_time,
     bool is_continous) {
   if (frame_callback_.is_null())
     return;
   frame_callback_.Run(video_frame, playout_time);
   cast_receiver_->RequestDecodedVideoFrame(on_video_decoded_cb_);
 }