Media Remoting: Draw remoting interstitial on poster image.

media/remoting/remoting_renderer_controller.cc

 // Copyright 2016 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 "media/remoting/remoting_renderer_controller.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/threading/thread_checker.h"
 #include "media/remoting/remoting_cdm_context.h"
@@ skipping 55 matching lines @@
   auto* remoting_cdm_context = RemotingCdmContext::From(cdm_context);
   if (!remoting_cdm_context)
     return;
 
   remoting_source_->RemoveClient(this);
   remoting_source_ = remoting_cdm_context->GetRemotingSource();
   remoting_source_->AddClient(this);  // Calls OnSessionStateChanged().
   UpdateAndMaybeSwitch();
 }
 
+void RemotingRendererController::OnSetPoster(const GURL& poster) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  poster_ = poster;

[miu, 2016/11/29 22:56:08]

See Model-View-Controller comment in header file. Then, here we want to:

1. If poster image URL changed, initiate download. The download callback will
then check the URL again (to make sure it is the same) and then pass the
resulting SkBitmap to the UI.

2. If poster image URL has become empty, set the empty SkBitmap().

[xjz, 2016/12/02 19:23:11]

Done.

+}
+
 void RemotingRendererController::SetSwitchRendererCallback(
     const base::Closure& cb) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(!cb.is_null());
 
   switch_renderer_cb_ = cb;
   UpdateAndMaybeSwitch();
 }
 
 base::WeakPtr<remoting::RpcBroker> RemotingRendererController::GetRpcBroker()
@@ skipping 150 matching lines @@
     // For encrypted content, it's only valid to switch to remoting renderer,
     // and never back to the local renderer. The RemotingCdmController will
     // force-stop the session when remoting has ended; so no need to call
     // StopRemoting() from here.
     DCHECK(!is_encrypted_);
     switch_renderer_cb_.Run();
     remoting_source_->StopRemoting(this);
   }
 }
 
+void RemotingRendererController::SetDownloadPosterCallback(
+    const DownloadPosterCallback& cb) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(download_poster_cb_.is_null());
+  download_poster_cb_ = cb;
+}
+
 }  // namespace media