Move android mediaplayer from render process to browser process.

content/browser/android/media_player_manager_android.cc

+// Copyright (c) 2012 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/android/media_player_manager_android.h"
+
+#include "base/bind.h"
+#include "content/browser/android/cookie_getter_impl.h"
+#include "content/common/view_messages.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/render_view_host.h"
+
+using media::MediaPlayerBridge;
+
+// Threshold on the number of media players per renderer before we start
+// attempting to release inactive media players.
+static const int kMediaPlayerThreshold = 1;
+
+namespace content {
+
+MediaPlayerManagerAndroid::MediaPlayerManagerAndroid(
+    RenderViewHost* render_view_host)
+    : RenderViewHostObserver(render_view_host) {
+}
+
+MediaPlayerManagerAndroid::~MediaPlayerManagerAndroid() {}
+
+bool MediaPlayerManagerAndroid::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(MediaPlayerManagerAndroid, msg)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_MediaPlayerInitialize,
+                        OnInitialize)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_MediaPlayerStart,
+                        OnStart)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_MediaPlayerSeek,
+                        OnSeek)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_MediaPlayerPause,
+                        OnPause)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_MediaPlayerRelease,
+                        OnReleaseResources)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_DestroyMediaPlayer,
+                        OnDestroyPlayer)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_DestroyAllMediaPlayers,
+                        DestroyAllMediaPlayers)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void MediaPlayerManagerAndroid::OnInitialize(
+    int player_id, const std::string& url,
+    const std::string& first_party_for_cookies) {
+  for (ScopedVector<MediaPlayerBridge>::iterator it = players_.begin();
+      it != players_.end(); ++it) {
+    if ((*it)->player_id() == player_id) {
+      players_.erase(it);
+      break;
+    }
+  }
+
+  RenderProcessHost* host = render_view_host()->GetProcess();
+  BrowserContext* context = host->GetBrowserContext();
+  players_.push_back(new MediaPlayerBridge(
+      player_id, url, first_party_for_cookies,
+      new CookieGetterImpl(context, host->GetID(), routing_id()),
+      context->IsOffTheRecord(), this,
+      base::Bind(&MediaPlayerManagerAndroid::OnError, base::Unretained(this)),
+      base::Bind(&MediaPlayerManagerAndroid::OnVideoSizeChanged,
+                 base::Unretained(this)),
+      base::Bind(&MediaPlayerManagerAndroid::OnBufferingUpdate,
+                 base::Unretained(this)),
+      base::Bind(&MediaPlayerManagerAndroid::OnPrepared,
+                 base::Unretained(this)),
+      base::Bind(&MediaPlayerManagerAndroid::OnPlaybackComplete,
+                 base::Unretained(this)),
+      base::Bind(&MediaPlayerManagerAndroid::OnSeekComplete,
+                 base::Unretained(this)),
+      base::Bind(&MediaPlayerManagerAndroid::OnTimeUpdate,
+                 base::Unretained(this))));
+
+  // Send a MediaPrepared message to webkit so that Load() can finish.
+  Send(new ViewMsg_MediaPrepared(routing_id(), player_id,
+                                 GetPlayer(player_id)->GetDuration()));
+}
+
+void MediaPlayerManagerAndroid::OnStart(int player_id) {
+  MediaPlayerBridge* player = GetPlayer(player_id);
+  if (player)
+    player->Start();
+}
+
+void MediaPlayerManagerAndroid::OnSeek(int player_id, base::TimeDelta time) {
+  MediaPlayerBridge* player = GetPlayer(player_id);
+  if (player)
+    player->SeekTo(time);
+}
+
+void MediaPlayerManagerAndroid::OnPause(int player_id) {
+  MediaPlayerBridge* player = GetPlayer(player_id);
+  if (player)
+    player->Pause();
+}
+
+void MediaPlayerManagerAndroid::OnReleaseResources(int player_id) {
+  MediaPlayerBridge* player = GetPlayer(player_id);
+  if (player)
+    player->Release();
+}
+
+void MediaPlayerManagerAndroid::OnDestroyPlayer(int player_id) {
+  for (ScopedVector<MediaPlayerBridge>::iterator it = players_.begin();
+      it != players_.end(); ++it) {
+    if ((*it)->player_id() == player_id) {
+      players_.erase(it);
+      break;
+    }
+  }
+}
+
+void MediaPlayerManagerAndroid::DestroyAllMediaPlayers() {
+  players_.clear();
+}
+
+MediaPlayerBridge* MediaPlayerManagerAndroid::GetPlayer(int player_id) {
+  for (ScopedVector<MediaPlayerBridge>::iterator it = players_.begin();
+      it != players_.end(); ++it) {
+    if ((*it)->player_id() == player_id)
+      return *it;
+  }
+  return NULL;
+}
+
+void MediaPlayerManagerAndroid::OnPrepared(int player_id,
+                                           base::TimeDelta duration) {
+  Send(new ViewMsg_MediaPrepared(routing_id(), player_id, duration));
+}
+
+void MediaPlayerManagerAndroid::OnPlaybackComplete(int player_id) {
+  Send(new ViewMsg_MediaPlaybackCompleted(routing_id(), player_id));
+}
+
+void MediaPlayerManagerAndroid::OnBufferingUpdate(
+    int player_id, int percentage) {
+  Send(new ViewMsg_MediaBufferingUpdate(routing_id(), player_id, percentage));
+}
+
+void MediaPlayerManagerAndroid::OnSeekComplete(int player_id,
+                                               base::TimeDelta current_time) {
+  Send(new ViewMsg_MediaSeekCompleted(routing_id(), player_id, current_time));
+}
+
+void MediaPlayerManagerAndroid::OnError(int player_id, int error) {
+  Send(new ViewMsg_MediaError(routing_id(), player_id, error));
+}
+
+void MediaPlayerManagerAndroid::OnVideoSizeChanged(
+    int player_id, int width, int height) {
+  Send(new ViewMsg_MediaVideoSizeChanged(routing_id(), player_id,
+      width, height));
+}
+
+void MediaPlayerManagerAndroid::OnTimeUpdate(int player_id,
+                                             base::TimeDelta current_time) {
+  Send(new ViewMsg_MediaTimeUpdate(routing_id(), player_id, current_time));
+}
+
+void MediaPlayerManagerAndroid::RequestMediaResources(
+    MediaPlayerBridge* player) {
+  if (player == NULL)
+    return;
+
+  int num_active_player = 0;
+  ScopedVector<MediaPlayerBridge>::iterator it;
+  for (it = players_.begin(); it != players_.end(); ++it) {
+    if (!(*it)->prepared())
+      continue;
+
+    // The player is already active, ignore it.
+    if ((*it) == player)
+      return;
+    else
+      num_active_player++;
+  }
+
+  // Number of active players are less than the threshold, do nothing.
+  if (num_active_player < kMediaPlayerThreshold)
+    return;
+
+  for (it = players_.begin(); it != players_.end(); ++it) {
+    if ((*it)->prepared() && !(*it)->IsPlaying()) {
+      (*it)->Release();
+      Send(new ViewMsg_MediaPlayerReleased(routing_id(), (*it)->player_id()));
+    }
+  }
+}
+
+void MediaPlayerManagerAndroid::ReleaseMediaResources(
+    MediaPlayerBridge* player) {
+  // Nothing needs to be done.
+}
+
+}  // namespace content