Adding ChunkDemuxer implementation.

media/filters/in_memory_url_protocol.h

Index: media/filters/in_memory_url_protocol.h
diff --git a/media/filters/in_memory_url_protocol.h b/media/filters/in_memory_url_protocol.h
new file mode 100644
index 0000000000000000000000000000000000000000..7bad5e3a39e10fa6070558491cdb9c9c23a810a9
--- /dev/null
+++ b/media/filters/in_memory_url_protocol.h
@@ -0,0 +1,42 @@
+// 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.
+
+#ifndef MEDIA_FILTERS_IN_MEMORY_URL_PROTOCOL_H_
+#define MEDIA_FILTERS_IN_MEMORY_URL_PROTOCOL_H_
+
+#include "media/filters/ffmpeg_glue.h"
+
+#include "base/basictypes.h"
+
+namespace media {
+
+// Simple FFmpegURLProtocol that reads from a buffer.
+// NOTE: This object does not copy the buffer so the
+//       buffer pointer passed into the constructor
+//       needs to remain valid for the entire lifetime of
+//       this object.
+class InMemoryUrlProtocol : public FFmpegURLProtocol {
+ public:
+  InMemoryUrlProtocol(const uint8* buf, int64 size, bool streaming);
+  virtual ~InMemoryUrlProtocol();
+
+  // FFmpegURLProtocol methods.
+  virtual int Read(int size, uint8* data);
+  virtual bool GetPosition(int64* position_out);
+  virtual bool SetPosition(int64 position);
+  virtual bool GetSize(int64* size_out);
+  virtual bool IsStreaming();
+
+ private:
+  const uint8* data_;
+  int64 size_;
+  int64 position_;
+  bool streaming_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(InMemoryUrlProtocol);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_FILTERS_IN_MEMORY_URL_PROTOCOL_H_