Pause EME player whose external surface is stolen by another player

content/browser/media/android/browser_media_player_manager.cc

 // Copyright 2013 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/android/browser_media_player_manager.h"
 
 #include "base/android/scoped_java_ref.h"
 #include "base/command_line.h"
 #include "content/browser/android/content_view_core_impl.h"
 #include "content/browser/media/android/browser_demuxer_android.h"
@@ skipping 320 matching lines @@
 
   if (is_request) {
     OnRequestExternalSurface(player_id, rect);
   }
   if (external_video_surface_container_) {
     external_video_surface_container_->OnExternalVideoSurfacePositionChanged(
         player_id, rect);
   }
 }
 
+void BrowserMediaPlayerManager::ReleasePlayerOfExternalVideoSurfaceIfNeeded(
+    int future_player) {
+  int current_player = ExternalVideoSurfaceContainer::kInvalidPlayerId;
+
+  if (external_video_surface_container_)
+    current_player = external_video_surface_container_->GetCurrentPlayerId();
+
+  if (current_player == ExternalVideoSurfaceContainer::kInvalidPlayerId)
+    return;
+
+  if (current_player != future_player)
+    OnMediaInterrupted(current_player);
+}
+
 void BrowserMediaPlayerManager::OnRequestExternalSurface(
     int player_id, const gfx::RectF& rect) {
   if (!external_video_surface_container_) {
     ContentBrowserClient* client = GetContentClient()->browser();
     external_video_surface_container_.reset(
         client->OverrideCreateExternalVideoSurfaceContainer(web_contents_));
   }
   // It's safe to use base::Unretained(this), because the callbacks will not
   // be called after running ReleaseExternalVideoSurface().
   if (external_video_surface_container_) {
+    // In case we're stealing the external surface from another player.
+    ReleasePlayerOfExternalVideoSurfaceIfNeeded(player_id);
     external_video_surface_container_->RequestExternalVideoSurface(
         player_id,
         base::Bind(&BrowserMediaPlayerManager::AttachExternalVideoSurface,
                    base::Unretained(this)),
         base::Bind(&BrowserMediaPlayerManager::DetachExternalVideoSurface,
                    base::Unretained(this)));
   }
 }
 #endif  // defined(VIDEO_HOLE)
 
 void BrowserMediaPlayerManager::OnEnterFullscreen(int player_id) {
   DCHECK_EQ(fullscreen_player_id_, -1);
 #if defined(VIDEO_HOLE)
+  // If this fullscreen player is started when another player
+  // uses the external surface, release that other player.
+  ReleasePlayerOfExternalVideoSurfaceIfNeeded(player_id);
   if (external_video_surface_container_)
     external_video_surface_container_->ReleaseExternalVideoSurface(player_id);
 #endif  // defined(VIDEO_HOLE)
   if (video_view_.get()) {
     fullscreen_player_id_ = player_id;
     video_view_->OpenVideo();
     return;
   } else if (!ContentVideoView::GetInstance()) {
     // In Android WebView, two ContentViewCores could both try to enter
     // fullscreen video, we just ignore the second one.
@@ skipping 183 matching lines @@
     external_video_surface_container_->ReleaseExternalVideoSurface(player_id);
 #endif  // defined(VIDEO_HOLE)
 }
 
 void BrowserMediaPlayerManager::ReleasePlayer(MediaPlayerAndroid* player) {
   player->Release();
   ReleaseMediaResources(player->player_id());
 }
 
 }  // namespace content