Mojify demuxers and allow running {Chunk/FFmpeg}Demuxer in a Utility Process

media/base/media_resource.h

 // Copyright 2014 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_MEDIA_RESOURCE_H_
 #define MEDIA_BASE_MEDIA_RESOURCE_H_
 
 #include "base/macros.h"
 #include "media/base/demuxer_stream.h"
 #include "media/base/media_export.h"
 #include "media/base/media_url_params.h"
 #include "url/gurl.h"
 
 namespace media {
 
 // Abstract class that defines how to retrieve "media resources" in
 // DemuxerStream form (for most cases) or URL form (for the MediaPlayerRenderer
 // case).
 //
 // The derived classes must return a non-null value for the getter method
 // associated with their type, and return a null/empty value for other getters.
 class MEDIA_EXPORT MediaResource {
  public:
   enum Type {
+    REMOTE,  // Indicates GetRemoteId() should be used
     STREAM,  // Indicates GetStreams() should be used
     URL,     // Indicates GetUrl() should be used
   };
 
+  static const int kInvalidRemoteId;
+
   MediaResource();
   virtual ~MediaResource();
 
   // For Type::STREAM:
   //   Returns the first stream of the given stream type (which is not allowed
   //   to be DemuxerStream::TEXT), or NULL if that type of stream is not
   //   present.
   //   NOTE: Once a DemuxerStream pointer is returned from GetStream it is
   //   guaranteed to stay valid for as long as the Demuxer/MediaResource
   //   is alive. But make no assumption that once GetStream returned a non-null
   //   pointer for some stream type then all subsequent calls will also return
   //   non-null pointer for the same stream type. In MSE Javascript code can
   //   remove SourceBuffer from a MediaSource at any point and this will make
   //   some previously existing streams inaccessible/unavailable.
   // Other types:
   //   Should not be called.
   virtual DemuxerStream* GetStream(DemuxerStream::Type type) = 0;
 
   // For Type::URL:
   //   Returns the URL parameters of the media to play. Empty URLs are legal,
   //   and should be handled appropriately by the caller.
   // Other types:
   //   Should not be called.
   virtual MediaUrlParams GetMediaUrlParams() const;
 
   virtual MediaResource::Type GetType() const;
 
+  virtual int32_t GetRemoteId() const;
+
+ protected:
+  int32_t remote_id_;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(MediaResource);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MEDIA_RESOURCE_H_