Media Remoting: Add remoting control logic for encrypted contents.

media/remoting/remoting_cdm_controller.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.

[xjz, 2016/10/27 22:45:58]

20% seems work well locally, but not with "git cl upload". Tried with different
values, and used 30%.

 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "media/gpu/avda_surface_tracker.h"
+#include "media/remoting/remoting_cdm_controller.h"
 
-#include "base/callback.h"
-#include "base/lazy_instance.h"
+#include "base/bind.h"
+#include "base/callback_helpers.h"
+#include "base/logging.h"
 #include "base/threading/thread_checker.h"
 
 namespace media {
 
-namespace {
-static base::LazyInstance<AVDASurfaceTracker> g_lazy_instance =
-    LAZY_INSTANCE_INITIALIZER;
+RemotingCdmController::RemotingCdmController(
+    scoped_refptr<RemotingSourceImpl> remoting_source)
+    : remoting_source_(std::move(remoting_source)) {
+  remoting_source_->AddClient(this);
 }
 
-AVDASurfaceTracker::AVDASurfaceTracker() {}
+RemotingCdmController::~RemotingCdmController() {
+  DCHECK(thread_checker_.CalledOnValidThread());
 
-AVDASurfaceTracker::~AVDASurfaceTracker() {}
-
-void AVDASurfaceTracker::RegisterOnDestroyingSurfaceCallback(
-    const OnDestroyingSurfaceCallback& cb) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  callbacks_.push_back(cb);
+  remoting_source_->RemoveClient(this);
 }
 
-void AVDASurfaceTracker::UnregisterOnDestroyingSurfaceCallback(
-    const OnDestroyingSurfaceCallback& cb) {
+void RemotingCdmController::OnStarted(bool success) {
   DCHECK(thread_checker_.CalledOnValidThread());
-  for (auto it = callbacks_.begin(); it != callbacks_.end(); ++it) {
-    if (it->Equals(cb)) {
-      callbacks_.erase(it);
-      return;
-    }
+
+  DCHECK(!cdm_check_cb_.is_null());
+  base::ResetAndReturn(&cdm_check_cb_).Run(success);
+  is_remoting_ = success;
+}
+
+void RemotingCdmController::OnSessionStateChanged() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  if (is_remoting_ &&
+      remoting_source_->state() == RemotingSessionState::SESSION_STOPPING) {
+    remoting_source_->ShutDown();
+    is_remoting_ = false;
   }
 }
 
-void AVDASurfaceTracker::NotifyDestroyingSurface(int surface_id) {
+void RemotingCdmController::ShouldCreateRemotingCdm(
+    const CdmCheckCallback& cb) {
   DCHECK(thread_checker_.CalledOnValidThread());
-  for (const auto& cb : callbacks_)
-    cb.Run(surface_id);
-}
+  DCHECK(!cb.is_null());
 
-AVDASurfaceTracker* AVDASurfaceTracker::GetInstance() {
-  return g_lazy_instance.Pointer();
+  if (is_remoting_) {
+    cb.Run(true);
+    return;
+  }
+
+  DCHECK(cdm_check_cb_.is_null());
+  cdm_check_cb_ = cb;
+  remoting_source_->StartRemoting(this);
 }
 
 }  // namespace media