chrome/renderer/plugins/plugin_preroller.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_RENDERER_PLUGINS_PLUGIN_PREROLLER_H_
   6 #define CHROME_RENDERER_PLUGINS_PLUGIN_PREROLLER_H_
   7
   8 #include "base/macros.h"
   9 #include "content/public/common/webplugininfo.h"
  10 #include "content/public/renderer/plugin_instance_throttler.h"
  11 #include "content/public/renderer/render_frame_observer.h"
  12 #include "third_party/WebKit/public/web/WebPluginParams.h"
  13 #include "url/gurl.h"
  14
  15 namespace blink {
  16 class WebLocalFrame;
  17 class WebPlugin;
  18 }
  19
  20 class SkBitmap;
  21
  22 // This class manages a plugin briefly for the purposes of keyframe extraction.
  23 // Once a keyframe has been extracted, this class will replace the plugin with
  24 // a ChromePluginPlaceholder. The actual plugin will continue to live in a
  25 // throttled state. This class manages its own lifetime.
  26 class PluginPreroller : public content::PluginInstanceThrottler::Observer,
  27                         public content::RenderFrameObserver {
  28  public:
  29   // Does not take ownership of either |plugin| or |throttler|.
  30   PluginPreroller(content::RenderFrame* render_frame,
  31                   blink::WebLocalFrame* frame,
  32                   const blink::WebPluginParams& params,
  33                   const content::WebPluginInfo& info,
  34                   const std::string& identifier,
  35                   const base::string16& name,
  36                   const base::string16& message,
  37                   blink::WebPlugin* plugin,
  38                   content::PluginInstanceThrottler* throttler);
  39
  40   ~PluginPreroller() override;
  41
  42  private:
  43   // content::PluginInstanceThrottler::Observer methods:
  44   void OnKeyframeExtracted(const SkBitmap* bitmap) override;
  45   void OnThrottleStateChange() override;
  46   void OnThrottlerDestroyed() override;
  47
  48   blink::WebLocalFrame* frame_;
  49   blink::WebPluginParams params_;
  50   content::WebPluginInfo info_;
  51   std::string identifier_;
  52   base::string16 name_;
  53   base::string16 message_;
  54
  55   blink::WebPlugin* plugin_;
  56   content::PluginInstanceThrottler* throttler_;
  57
  58   GURL keyframe_data_url_;
  59
  60   DISALLOW_COPY_AND_ASSIGN(PluginPreroller);
  61 };
  62
  63 #endif  // CHROME_RENDERER_PLUGINS_PLUGIN_PREROLLER_H_