chromium media onFrameInfoUpdate

onFrameInfoUpdated　新增JNI接口，主要处理网页滑动时，VideoView 位置和坐标更新，重新刷新应用层Video位置

media_player_bridge.cc

void MediaPlayerBridge::OnFrameInfoUpdated() {
  if (!j_media_player_bridge_.is_null()){
    JNIEnv* env = base::android::AttachCurrentThread();
    CHECK(env);

    Java_MediaPlayerBridge_onFrameInfoUpdated(
        env, j_media_player_bridge_.obj());
  }
}

browser_media_player_manager.cc

browser_mediao_player_manager.cc　中调用　MediaPlayerBridge

void BrowserMediaPlayerManager::UpdateFrameInfo() {
  MediaPlayerAndroid* lastPlayer =  GetPlayer(last_player_id_);
  if(lastPlayer){
      MediaPlayerBridge* lastBridge = static_cast<MediaPlayerBridge*>(lastPlayer);
      //invoke java to remove previous videoview
      if(lastBridge){
          lastBridge->OnFrameInfoUpdated();
      }
  }
}

UpdateFrameInfo() 自己封装，被OnFrameInfoUpdated()调用

void BrowserMediaPlayerManager::OnFrameInfoUpdated() {
  //zhangls add copy
  UpdateFrameInfo();
  //end

  if (external_video_surface_container_)
    external_video_surface_container_->OnFrameInfoUpdated();
}

external_video_surface_container_ 是一个智能指针，等下分析

media_web_content_observer.cc

BrowserMediaPlayerMamanger.onFrameInfoUpdated()在这里被调用

#if defined(VIDEO_HOLE)
void MediaWebContentsObserver::OnFrameInfoUpdated() {
  for (MediaPlayerManagerMap::iterator iter = media_player_managers_.begin();
      iter != media_player_managers_.end(); ++iter) {
    BrowserMediaPlayerManager* manager = iter->second;
    manager->OnFrameInfoUpdated();
  }
}
#endif  // defined(VIDEO_HOLE)

render_widget_host_view_android.cc

这里有一个很长很重要的方法　OnFrameMetadataUpdated

void RenderWidgetHostViewAndroid::OnFrameMetadataUpdated(
    const cc::CompositorFrameMetadata& frame_metadata) {
    //...略去若干
    
     if (overscroll_controller_)
    overscroll_controller_->OnFrameMetadataUpdated(frame_metadata);
    //...略去若干
    / All offsets and sizes are in CSS pixels.
  content_view_core_->UpdateFrameInfo(
      frame_metadata.root_scroll_offset,
      frame_metadata.page_scale_factor,
      gfx::Vector2dF(frame_metadata.min_page_scale_factor,
                     frame_metadata.max_page_scale_factor),
      frame_metadata.root_layer_size,
      frame_metadata.scrollable_viewport_size,
      frame_metadata.location_bar_offset,
      frame_metadata.location_bar_content_translation);
#if defined(VIDEO_HOLE)
  if (host_ && host_->IsRenderView()) {
    RenderViewHostImpl* rvhi = static_cast<RenderViewHostImpl*>(
        RenderViewHost::From(host_));
    WebContentsImpl* web_contents_impl =
        static_cast<WebContentsImpl*>(WebContents::FromRenderViewHost(rvhi));
    if (web_contents_impl)
      web_contents_impl->media_web_contents_observer()->OnFrameInfoUpdated();
  }
#endif  // defined(VIDEO_HOLE)
}

方法中用到的　overscroll_controller 是一个智能指针,主要实现在overscroll_controller_android.cc中

在方法　InternalSwapCompositorFrame(xxxxx)，SynchronousFrameMetadata(xxx),中调用OnFrameMetadataUpdated。至于这两个方法在哪里调用，这个点上就不再跟踪。