Migrating MediaSession messages to mojo

content/renderer/media/android/renderer_media_session_manager.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 "content/renderer/media/android/renderer_media_session_manager.h"
 
 #include "base/logging.h"
 #include "base/optional.h"
+#include "base/strings/utf_string_conversions.h"
 #include "content/common/media/media_metadata_sanitizer.h"
-#include "content/common/media/media_session_messages_android.h"
 #include "content/public/common/media_metadata.h"
-#include "content/public/renderer/render_thread.h"
+#include "content/public/renderer/render_frame.h"
 #include "content/renderer/media/android/webmediasession_android.h"
+#include "services/shell/public/cpp/interface_provider.h"
 
 namespace content {
 
+namespace {
+
+blink::mojom::MediaMetadataIconPtr ToMojoMediaMetadataIcon(
+    const MediaMetadata::Artwork& icon) {
+  blink::mojom::MediaMetadataIconPtr mojo_icon
+      = blink::mojom::MediaMetadataIcon::New();
+  mojo_icon->src = icon.src;
+  mojo_icon->type = icon.type;
+  mojo_icon->sizes = icon.sizes;
+
+  return mojo_icon;
+}
+
+blink::mojom::MediaMetadataPtr ToMojoMediaMetadata(
+    const base::Optional<MediaMetadata>& metadata) {
+  blink::mojom::MediaMetadataPtr mojo_metadata;
+  if (!metadata.has_value())
+    return mojo_metadata;
+  mojo_metadata = blink::mojom::MediaMetadata::New();
+  mojo_metadata->title = metadata->title;
+  mojo_metadata->artist = metadata->artist;
+  mojo_metadata->album = metadata->album;
+  for (const auto& icon : metadata->artwork)
+    mojo_metadata->artwork.push_back(ToMojoMediaMetadataIcon(icon));
+  return mojo_metadata;
+}
+
+}  // anonymous namespace
+
 RendererMediaSessionManager::RendererMediaSessionManager(
     RenderFrame* render_frame)
     : RenderFrameObserver(render_frame),
       next_session_id_(blink::WebMediaSession::DefaultID + 1) {}
 
 RendererMediaSessionManager::~RendererMediaSessionManager() {
   DCHECK(sessions_.empty())
       << "RendererMediaSessionManager is owned by RenderFrameImpl and is "
          "destroyed only after all media sessions are destroyed.";
 }
 
-bool RendererMediaSessionManager::OnMessageReceived(const IPC::Message& msg) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(RendererMediaSessionManager, msg)
-    IPC_MESSAGE_HANDLER(MediaSessionMsg_DidActivate, OnDidActivate)
-    IPC_MESSAGE_HANDLER(MediaSessionMsg_DidDeactivate, OnDidDeactivate)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
 void RendererMediaSessionManager::OnDestruct() {
   delete this;
 }
 
 int RendererMediaSessionManager::RegisterMediaSession(
     WebMediaSessionAndroid* session) {
   sessions_[next_session_id_] = session;
   return next_session_id_++;
 }
 
 void RendererMediaSessionManager::UnregisterMediaSession(int session_id) {
   sessions_.erase(session_id);
 }
 
 void RendererMediaSessionManager::Activate(
     int session_id,
     std::unique_ptr<blink::WebMediaSessionActivateCallback> callback) {
-  int request_id = pending_activation_requests_.Add(callback.release());
-  Send(new MediaSessionHostMsg_Activate(routing_id(), session_id, request_id));
+  if (GetMediaSessionService()) {
+    GetMediaSessionService()->Activate(
+        session_id,
+        base::Bind(&RendererMediaSessionManager::OnDidActivate,
+                   base::Unretained(this), base::Passed(&callback)));
+  }
 }
 
 void RendererMediaSessionManager::Deactivate(
     int session_id,
     std::unique_ptr<blink::WebMediaSessionDeactivateCallback> callback) {
-  int request_id = pending_deactivation_requests_.Add(callback.release());
-  Send(
-      new MediaSessionHostMsg_Deactivate(routing_id(), session_id, request_id));
+  if (GetMediaSessionService()) {
+    GetMediaSessionService()->Deactivate(
+        session_id,
+        base::Bind(&RendererMediaSessionManager::OnDidDeactivate,
+                   base::Unretained(this), base::Passed(&callback)));
+  }
 }
 
 void RendererMediaSessionManager::SetMetadata(
     int session_id, const base::Optional<MediaMetadata>& metadata) {
-
-  // TODO(zqzhang): print a console warning when metadata is dirty. See
-  // https://crbug.com/625244.
-  Send(new MediaSessionHostMsg_SetMetadata(
-      routing_id(), session_id,
+  base::Optional<MediaMetadata> sanitized_metadata =
       (!metadata.has_value() ||
        MediaMetadataSanitizer::CheckSanity(metadata.value()))
           ? metadata
-          : MediaMetadataSanitizer::Sanitize(metadata.value())));
+          : MediaMetadataSanitizer::Sanitize(metadata.value());
+  // TODO(zqzhang): print a console warning when metadata is dirty. See
+  // https://crbug.com/625244.
+  if (GetMediaSessionService()) {
+    GetMediaSessionService()->SetMetadata(
+        session_id, ToMojoMediaMetadata(sanitized_metadata));

[mlamouri (slow - plz ping), 2016/09/27 08:33:11]

Could this call and the other mojo calls happen from Blink instead of having
them happen in the content/renderer/ layer?

+  }
 }
 
-void RendererMediaSessionManager::OnDidActivate(int request_id, bool success) {
-  DCHECK(pending_activation_requests_.Lookup(request_id)) << request_id;
-  blink::WebMediaSessionActivateCallback* callback =
-      pending_activation_requests_.Lookup(request_id);
+blink::mojom::MediaSessionServicePtr&
+RendererMediaSessionManager::GetMediaSessionService() {
+  if (render_frame() && !media_session_service_.get()) {
+    render_frame()->GetRemoteInterfaces()
+        ->GetInterface(&media_session_service_);
+  }
+  return media_session_service_;
+}
+
+void RendererMediaSessionManager::OnDidActivate(
+    std::unique_ptr<blink::WebMediaSessionActivateCallback> callback,
+    bool success) {
   if (success) {
     callback->onSuccess();
   } else {
     callback->onError(
         blink::WebMediaSessionError(blink::WebMediaSessionError::Activate));
   }
-  pending_activation_requests_.Remove(request_id);
 }
 
-void RendererMediaSessionManager::OnDidDeactivate(int request_id) {
-  DCHECK(pending_deactivation_requests_.Lookup(request_id)) << request_id;
-  pending_deactivation_requests_.Lookup(request_id)->onSuccess();
-  pending_deactivation_requests_.Remove(request_id);
+void RendererMediaSessionManager::OnDidDeactivate(
+    std::unique_ptr<blink::WebMediaSessionDeactivateCallback> callback) {
+  callback->onSuccess();
 }
 
 }  // namespace content