Pipeline_Impl was modified to properly render a stream that has video but no ...

media/base/filter_host.h

 // Copyright (c) 2006-2008 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 definitionss).  Filters
@@ skipping 44 matching lines @@
   virtual void ScheduleTimeUpdateCallback(base::TimeDelta time) = 0;
 
   // Filters must call this method to indicate that their initialization is
   // complete.  They may call this from within their Initialize() method or may
   // choose call it after processing some data.
   virtual void InitializationComplete() = 0;
 
   // Posts a task to be executed asynchronously on the pipeline's thread.
   virtual void PostTask(Task* task) = 0;
 
-  // Stops execution of the pipeline due to a fatal error.
+  // Stops execution of the pipeline due to a fatal error.  Do not call this
+  // method with PIPELINE_OK or PIPELINE_STOPPING (used internally by pipeline).
   virtual void Error(PipelineError error) = 0;
 
   // Sets the current time.  Any filters that have registered a callback through
   // the SetTimeUpdateCallback method will be notified of the change.
   virtual void SetTime(base::TimeDelta time) = 0;
 
   // Get the duration of the media in microseconds.  If the duration has not
   // been determined yet, then returns 0.
   virtual void SetDuration(base::TimeDelta duration) = 0;
 
@@ skipping 11 matching lines @@
   // Sets the size of the video output in pixel units.
   virtual void SetVideoSize(size_t width, size_t height) = 0;
 
  protected:
   virtual ~FilterHost() {}
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_FILTER_HOST_H_