Fire CanPlayThrough immediately for local and streaming media files

media/base/filter_host.h

 // Copyright (c) 2011 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.
 
 // FilterHost describes an interface for individual filters to access and
 // modify global playback information.  Every filter is given a filter host
 // reference as part of initialization.
 //
 // This interface is intentionally verbose to cover the needs for the different
 // types of filters (see media/base/filters.h for filter definitions).  Filters
@@ skipping 45 matching lines @@
   // Sets the natural size of the video output in pixel units.
   virtual void SetNaturalVideoSize(const gfx::Size& size) = 0;
 
   // Sets the flag to indicate that we are doing streaming.
   virtual void SetStreaming(bool streaming) = 0;
 
   // Notifies that this filter has ended, typically only called by filter graph
   // endpoints such as renderers.
   virtual void NotifyEnded() = 0;
 
-  // Sets the flag to indicate that our media is now loaded.
-  virtual void SetLoaded(bool loaded) = 0;
+  // Sets the flag to indicate the source of the media is local, such as a
+  // local file on disk.
+  // NOTE: The "FromFilter" is unfortunate; it is needed so as not to conflict
+  // with the SetLocalSource method in the Pipeline interface.
+  virtual void SetLocalSourceFromFilter(bool local_source) = 0;
 
   // Sets the flag to indicate current network activity.
   virtual void SetNetworkActivity(bool is_downloading_data) = 0;
 
   // Disable audio renderer by calling OnAudioRendererDisabled() on all
   // filters.
   virtual void DisableAudioRenderer() = 0;
 
   // Sets the byte offset at which the client is requesting the video.
   virtual void SetCurrentReadPosition(int64 offset) = 0;
 
   // Gets the byte offset at which the client is requesting the video.
   virtual int64 GetCurrentReadPosition() = 0;
 
  protected:
   virtual ~FilterHost() {}
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_FILTER_HOST_H_