Implement sourceAddId() & sourceRemoveId()

media/filters/chunk_demuxer.h

 // Copyright (c) 2012 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_FILTERS_CHUNK_DEMUXER_H_
 #define MEDIA_FILTERS_CHUNK_DEMUXER_H_
 
 #include <list>
+#include <string>
 
 #include "base/synchronization/lock.h"
 #include "media/base/byte_queue.h"
 #include "media/base/demuxer.h"
 #include "media/base/stream_parser.h"
 
 namespace media {
 
 class ChunkDemuxerClient;
 class ChunkDemuxerStream;
 class FFmpegURLProtocol;
 
 // Demuxer implementation that allows chunks of media data to be passed
 // from JavaScript to the media stack.
 class MEDIA_EXPORT ChunkDemuxer : public Demuxer, public StreamParserHost {
  public:
+  enum Status {
+    kOk,              // ID added w/o error.
+    kNotSupported,    // Type specified is not supported.
+    kReachedIdLimit,  // Reached ID limit. We can't handle any more IDs.
+  };
+
   explicit ChunkDemuxer(ChunkDemuxerClient* client);
   virtual ~ChunkDemuxer();
 
   // Demuxer implementation.
   virtual void Initialize(DemuxerHost* host,
                           const PipelineStatusCB& cb) OVERRIDE;
   virtual void Stop(const base::Closure& callback) OVERRIDE;
   virtual void Seek(base::TimeDelta time, const PipelineStatusCB&  cb) OVERRIDE;
   virtual void OnAudioRendererDisabled() OVERRIDE;
   virtual scoped_refptr<DemuxerStream> GetStream(
       DemuxerStream::Type type) OVERRIDE;
   virtual base::TimeDelta GetStartTime() const OVERRIDE;
   virtual int GetBitrate() OVERRIDE;
   virtual bool IsLocalSource() OVERRIDE;
   virtual bool IsSeekable() OVERRIDE;
 
   // Methods used by an external object to control this demuxer.
   void FlushData();
 
-  // Appends media data to the stream. Returns false if this method
-  // is called in an invalid state.
-  bool AppendData(const uint8* data, size_t length);
+  // Registers a new |id| to use for AppendData() calls. |type| indicates
+  // the MIME type for the data that we intend to append for this ID.
+  // kOk is returned if the demuxer has enough resources to support another ID
+  //    and supports the format indicated by |type|.
+  // kNotSupported is returned if |type| is not a supported format.
+  // kReachedIdLimit is returned if the demuxer cannot handle another ID right
+  //    now.
+  Status AddId(const std::string& id, const std::string& type);
+
+  // Removed an ID & associated resources that were previously added with
+  // AddId().
+  void RemoveId(const std::string& id);
+
+  // Appends media data to the source buffer associated with |id|. Returns
+  // false if this method is called in an invalid state.
+  bool AppendData(const std::string& id, const uint8* data, size_t length);
   void EndOfStream(PipelineStatus status);
   bool HasEnded();
   void Shutdown();
 
  private:
   enum State {
     WAITING_FOR_INIT,
     INITIALIZING,
     INITIALIZED,
     ENDED,
@@ skipping 31 matching lines @@
   base::TimeDelta duration_;
 
   scoped_ptr<StreamParser> stream_parser_;
 
   // Should a Seek() call wait for more data before calling the
   // callback.
   bool seek_waits_for_data_;
 
   ByteQueue byte_queue_;
 
+  // TODO(acolwell): Remove this when fixing http://crbug.com/122909
+  std::string source_id_;
+
   DISALLOW_COPY_AND_ASSIGN(ChunkDemuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_CHUNK_DEMUXER_H_