Adding ChunkDemuxer implementation.

media/filters/buffer_url_protocol.h

+// 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_BUFFER_URL_PROTOCOL_H_
+#define MEDIA_FILTERS_BUFFER_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 BufferUrlProtocol : public FFmpegURLProtocol {

[scherkus (not reviewing), 2011/06/23 18:50:18]

I had a feeling this code looked oddly familiar... sorry for not noticing sooner
btu take a look at InMemoryFileReader in media/filters/audio_file_reader.h

want to take a stab at merging the two?  I have no qualms over which one you
decide to use (although InMemoryDataReader should have been in its own file -- i
forgot to catch that one)

[acolwell GONE FROM CHROMIUM, 2011/06/23 22:42:17]

Done.

+ public:
+  BufferUrlProtocol(const uint8* buf, int size, bool streaming);
+  virtual ~BufferUrlProtocol();
+
+  // 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* buf_;
+  int size_;
+  int offset_;
+  bool streaming_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(BufferUrlProtocol);
+};
+
+}

[scherkus (not reviewing), 2011/06/23 18:50:18]

// namespace media

[acolwell GONE FROM CHROMIUM, 2011/06/23 22:42:17]

Done.

+
+#endif  // MEDIA_FILTERS_BUFFER_URL_PROTOCOL_H_