Implement MediaSession on top of the WebMediaPlayerDelegate.

content/browser/media/media_web_contents_observer.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 "content/browser/media/media_web_contents_observer.h"
 
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
 #include "build/build_config.h"
 #include "content/browser/media/audible_metrics.h"
 #include "content/browser/media/audio_stream_monitor.h"
 #include "content/browser/power_save_blocker_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
-#include "content/common/frame_messages.h"
+#include "content/common/media/media_player_delegate_messages.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "ipc/ipc_message_macros.h"
 
 namespace content {
 
 namespace {
 
 static base::LazyInstance<AudibleMetrics>::Leaky g_audible_metrics =
     LAZY_INSTANCE_INITIALIZER;
@@ skipping 32 matching lines @@
       web_contents(), audio_stream_monitor->IsCurrentlyAudible());
 }
 
 bool MediaWebContentsObserver::OnMessageReceived(
     const IPC::Message& msg,
     RenderFrameHost* render_frame_host) {
   bool handled = true;
   // TODO(dalecurtis): These should no longer be FrameHostMsg.
   IPC_BEGIN_MESSAGE_MAP_WITH_PARAM(MediaWebContentsObserver, msg,
                                    render_frame_host)
-    IPC_MESSAGE_HANDLER(FrameHostMsg_MediaPlayingNotification,
-                        OnMediaPlayingNotification)
-    IPC_MESSAGE_HANDLER(FrameHostMsg_MediaPausedNotification,
-                        OnMediaPausedNotification)
+    IPC_MESSAGE_HANDLER(MediaPlayerDelegateHostMsg_OnMediaDestroyed,
+                        OnMediaDestroyed)
+    IPC_MESSAGE_HANDLER(MediaPlayerDelegateHostMsg_OnMediaPaused, OnMediaPaused)
+    IPC_MESSAGE_HANDLER(MediaPlayerDelegateHostMsg_OnMediaPlaying,
+                        OnMediaPlaying)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
-void MediaWebContentsObserver::OnMediaPlayingNotification(
+void MediaWebContentsObserver::WasShown() {
+  // Restore power save blocker if there are active video players running.
+  if (!active_video_players_.empty() && !video_power_save_blocker_)
+    CreateVideoPowerSaveBlocker();
+}
+
+void MediaWebContentsObserver::WasHidden() {
+  // If there are entities capturing screenshots or video (e.g., mirroring),
+  // don't release the power save blocker.
+  if (!web_contents()->GetCapturerCount())
+    video_power_save_blocker_.reset();
+}
+
+void MediaWebContentsObserver::OnMediaDestroyed(
     RenderFrameHost* render_frame_host,
-    int64_t player_cookie,
+    int delegate_id) {
+  OnMediaPaused(render_frame_host, delegate_id, true);
+}
+
+
+void MediaWebContentsObserver::OnMediaPaused(RenderFrameHost* render_frame_host,
+                                             int delegate_id,
+                                             bool reached_end_of_stream) {
+  const MediaPlayerId id(render_frame_host, delegate_id);
+  const bool removed_audio = RemoveMediaPlayerEntry(id, &active_audio_players_);
+  const bool removed_video = RemoveMediaPlayerEntry(id, &active_video_players_);
+  MaybeReleasePowerSaveBlockers();
+
+  if (removed_audio || removed_video) {
+    // Notify observers the player has been "paused".
+    static_cast<WebContentsImpl*>(web_contents())->MediaStoppedPlaying(id);
+  }
+}
+
+void MediaWebContentsObserver::OnMediaPlaying(
+    RenderFrameHost* render_frame_host,
+    int delegate_id,
     bool has_video,
     bool has_audio,
-    bool is_remote) {
+    bool is_remote,
+    base::TimeDelta duration) {
   // Ignore the videos playing remotely and don't hold the wake lock for the
   // screen. TODO(dalecurtis): Is this correct? It means observers will not
   // receive play and pause messages.
   if (is_remote)
     return;
 
-  const MediaPlayerId id(render_frame_host, player_cookie);
+  const MediaPlayerId id(render_frame_host, delegate_id);
   if (has_audio) {
     AddMediaPlayerEntry(id, &active_audio_players_);
 
     // If we don't have audio stream monitoring, allocate the audio power save
     // blocker here instead of during NotifyNavigationStateChanged().
     if (!audio_power_save_blocker_ &&
         !AudioStreamMonitor::monitoring_available()) {
       CreateAudioPowerSaveBlocker();
     }
   }
 
   if (has_video) {
     AddMediaPlayerEntry(id, &active_video_players_);
 
     // If we're not hidden and have just created a player, create a blocker.
     if (!video_power_save_blocker_ &&
         !static_cast<WebContentsImpl*>(web_contents())->IsHidden()) {
       CreateVideoPowerSaveBlocker();
     }
   }
 
   // Notify observers of the new player.
   DCHECK(has_audio || has_video);
   static_cast<WebContentsImpl*>(web_contents())->MediaStartedPlaying(id);
 }
 
-void MediaWebContentsObserver::OnMediaPausedNotification(
-    RenderFrameHost* render_frame_host,
-    int64_t player_cookie) {
-  const MediaPlayerId id(render_frame_host, player_cookie);
-  const bool removed_audio = RemoveMediaPlayerEntry(id, &active_audio_players_);
-  const bool removed_video = RemoveMediaPlayerEntry(id, &active_video_players_);
-  MaybeReleasePowerSaveBlockers();
-
-  if (removed_audio || removed_video) {
-    // Notify observers the player has been "paused".
-    static_cast<WebContentsImpl*>(web_contents())->MediaStoppedPlaying(id);
-  }
-}
-
 void MediaWebContentsObserver::ClearPowerSaveBlockers(
     RenderFrameHost* render_frame_host) {
   std::set<MediaPlayerId> removed_players;
   RemoveAllMediaPlayerEntries(render_frame_host, &active_audio_players_,
                               &removed_players);
   RemoveAllMediaPlayerEntries(render_frame_host, &active_video_players_,
                               &removed_players);
   MaybeReleasePowerSaveBlockers();
 
   // Notify all observers the player has been "paused".
@@ skipping 15 matching lines @@
   video_power_save_blocker_ = PowerSaveBlocker::Create(
       PowerSaveBlocker::kPowerSaveBlockPreventDisplaySleep,
       PowerSaveBlocker::kReasonVideoPlayback, "Playing video");
 // TODO(mfomitchev): Support PowerSaveBlocker on Aura - crbug.com/546718.
 #if defined(OS_ANDROID) && !defined(USE_AURA)
   static_cast<PowerSaveBlockerImpl*>(video_power_save_blocker_.get())
       ->InitDisplaySleepBlocker(web_contents());
 #endif
 }
 
-void MediaWebContentsObserver::WasShown() {
-  // Restore power save blocker if there are active video players running.
-  if (!active_video_players_.empty() && !video_power_save_blocker_)
-    CreateVideoPowerSaveBlocker();
-}
-
-void MediaWebContentsObserver::WasHidden() {
-  // If there are entities capturing screenshots or video (e.g., mirroring),
-  // don't release the power save blocker.
-  if (!web_contents()->GetCapturerCount())
-    video_power_save_blocker_.reset();
-}
-
 void MediaWebContentsObserver::MaybeReleasePowerSaveBlockers() {
   // If there are no more audio players and we don't have audio stream
   // monitoring, release the audio power save blocker here instead of during
   // NotifyNavigationStateChanged().
   if (active_audio_players_.empty() &&
       !AudioStreamMonitor::monitoring_available()) {
     audio_power_save_blocker_.reset();
   }
 
   // If there are no more video players, clear the video power save blocker.
@@ skipping 32 matching lines @@
 }
 
 void MediaWebContentsObserver::RemoveAllMediaPlayerEntries(
     RenderFrameHost* render_frame_host,
     ActiveMediaPlayerMap* player_map,
     std::set<MediaPlayerId>* removed_players) {
   auto it = player_map->find(render_frame_host);
   if (it == player_map->end())
     return;
 
-  for (int64_t player_cookie : it->second)
-    removed_players->insert(MediaPlayerId(render_frame_host, player_cookie));
+  for (int delegate_id : it->second)
+    removed_players->insert(MediaPlayerId(render_frame_host, delegate_id));
 
   player_map->erase(it);
 }
 
 }  // namespace content