Adding ChunkDemuxer implementation.

media/webm/cluster_builder.h

Index: media/webm/cluster_builder.h
diff --git a/media/webm/cluster_builder.h b/media/webm/cluster_builder.h
new file mode 100644
index 0000000000000000000000000000000000000000..3ff30ab2406438c3de9b92efab292e464d965ed8
--- /dev/null
+++ b/media/webm/cluster_builder.h
@@ -0,0 +1,55 @@
+// 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_WEBM_CLUSTER_BUILDER_H_
+#define MEDIA_WEBM_CLUSTER_BUILDER_H_
+
+#include "base/basictypes.h"
+#include "base/scoped_ptr.h"
+#include "media/base/buffers.h"
+
+namespace media {
+
+class Cluster {
+ public:
+  // Takes ownership of |data|
+  Cluster(const uint8* data, int size);
+  ~Cluster();
+
+  const uint8* data() const { return data_.get(); }
+  int size() const { return size_; }
+
+ private:
+  scoped_array<const uint8> data_;
+  int size_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(Cluster);
+};
+
+class ClusterBuilder {
+ public:
+  ClusterBuilder();
+
+  void SetClusterTimecode(int64 cluster_timecode);
+  void AddSimpleBlock(int track_num, int64 timecode, int flags,
+                      const uint8* data, int size);
+
+  Cluster* Finish();
+
+ private:
+  void Reset();
+  void ExtendBuffer(int bytes_needed);
+  void UpdateUInt64(int offset, int64 value);
+
+  scoped_array<uint8> buffer_;
+  int buffer_size_;
+  int bytes_used_;
+  int64 cluster_timecode_;
+
+  DISALLOW_COPY_AND_ASSIGN(ClusterBuilder);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_WEBM_CLUSTER_BUILDER_H_