Web media player pipeline: implemented feature to choose proper...

media/base/filter_collection.h

 // Copyright (c) 2010 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.
 
 #ifndef MEDIA_BASE_FILTER_COLLECTION_H_
 #define MEDIA_BASE_FILTER_COLLECTION_H_
 
 #include <list>
 
 #include "base/ref_counted.h"
@@ skipping 19 matching lines @@
   bool IsEmpty() const;
 
   // Remove remaining filters.
   void Clear();
 
   // Selects a filter of the specified type from the collection.
   // If the required filter cannot be found, NULL is returned.
   // If a filter is returned it is removed from the collection.
   void SelectDataSource(scoped_refptr<DataSource>* filter_out);
   void SelectDemuxer(scoped_refptr<Demuxer>* filter_out);
-  void SelectVideoDecoder(scoped_refptr<VideoDecoder>* filter_out);
+  void SelectVideoDecoder(scoped_refptr<VideoDecoder>* filter_out,
+                                                       int codec_id);
   void SelectAudioDecoder(scoped_refptr<AudioDecoder>* filter_out);
   void SelectVideoRenderer(scoped_refptr<VideoRenderer>* filter_out);
   void SelectAudioRenderer(scoped_refptr<AudioRenderer>* filter_out);
 
  private:
   // Identifies the type of filter implementation. Each filter has to be one of
   // the following types. This is used to mark, identify, and support
   // downcasting of different filter types stored in the filters_ list.
   enum FilterType {
     DATA_SOURCE,
     DEMUXER,
     AUDIO_DECODER,
     VIDEO_DECODER,
     AUDIO_RENDERER,
     VIDEO_RENDERER,
   };
 
   // List of filters managed by this collection.
   typedef std::pair<FilterType, scoped_refptr<Filter> > FilterListElement;
   typedef std::list<FilterListElement> FilterList;
   FilterList filters_;
 
   // Helper function that adds a filter to the filter list.
   void AddFilter(FilterType filter_type, Filter* filter);
 
   // Helper function for SelectXXX() methods. It manages the
   // downcasting and mapping between FilterType and Filter class.
   template<FilterType filter_type, typename F>
-  void SelectFilter(scoped_refptr<F>* filter_out);
+  void SelectFilter(scoped_refptr<F>* filter_out, void *filter_props);
 
-  // Helper function that searches the filters list for a specific filter type.
-  void SelectFilter(FilterType filter_type, scoped_refptr<Filter>* filter_out);
+  // Helper function that searches the filters list for a specific filter type
+  // and filter properties.
+  void SelectFilter(FilterType filter_type, scoped_refptr<Filter>* filter_out,
+    void *filter_props);
 
   DISALLOW_COPY_AND_ASSIGN(FilterCollection);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_FILTER_COLLECTION_H_