[Chromecast] Add CmaMediaRendererFactory and IPC proxy components

chromecast/renderer/media/media_channel_proxy.cc

+// Copyright 2014 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 "chromecast/renderer/media/media_channel_proxy.h"
+
+#include "base/logging.h"
+#include "chromecast/common/media/cma_messages.h"
+
+namespace chromecast {
+namespace media {
+
+MediaChannelProxy::MediaChannelProxy()
+    : is_open_(false),
+      id_(0) {
+  filter_ = CmaMessageFilterProxy::Get();
+  DCHECK(filter_.get());
+}
+
+MediaChannelProxy::~MediaChannelProxy() {
+}
+
+void MediaChannelProxy::Open(LoadType load_type) {
+  CHECK(!is_open_);
+  // Renderer side.
+  id_ = filter_->CreateChannel();
+  is_open_ = true;
+
+  // Browser side.
+  bool success = Send(
+      scoped_ptr<IPC::Message>(new CmaHostMsg_CreateMedia(id_, load_type)));
+  if (!success) {
+    is_open_ = false;
+    id_ = 0;
+  }
+}
+
+void MediaChannelProxy::Close() {
+  if (!is_open_)
+    return;
+
+  // Browser side.
+  Send(scoped_ptr<IPC::Message>(new CmaHostMsg_DestroyMedia(id_)));
+
+  // Renderer side.
+  is_open_ = false;
+  filter_->DestroyChannel(id_);
+  id_ = 0;
+}
+
+bool MediaChannelProxy::SetMediaDelegate(
+    const CmaMessageFilterProxy::MediaDelegate& media_delegate) {
+  if (!is_open_)
+    return false;
+  return filter_->SetMediaDelegate(id_, media_delegate);
+}
+
+bool MediaChannelProxy::SetAudioDelegate(
+    const CmaMessageFilterProxy::AudioDelegate& audio_delegate) {
+  if (!is_open_)
+    return false;
+  return filter_->SetAudioDelegate(id_, audio_delegate);
+}
+
+bool MediaChannelProxy::SetVideoDelegate(
+    const CmaMessageFilterProxy::VideoDelegate& video_delegate) {
+  if (!is_open_)
+    return false;
+  return filter_->SetVideoDelegate(id_, video_delegate);
+}
+
+bool MediaChannelProxy::Send(scoped_ptr<IPC::Message> message) {
+  if (!is_open_)
+    return false;
+  return filter_->Send(message.Pass());
+}
+
+}  // namespace media
+}  // namespace chromecast