Adding ChunkDemuxer implementation.

media/webm/webm_cluster_parser.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_WEBM_WEBM_CLUSTER_PARSER_H_
+#define MEDIA_WEBM_WEBM_CLUSTER_PARSER_H_
+
+#include <deque>
+
+#include "base/scoped_ptr.h"
+#include "media/base/buffers.h"
+#include "media/webm/webm_parser.h"
+
+namespace media {
+
+class WebMClusterParser : public WebMParserClient {
+ public:
+  typedef std::deque<scoped_refptr<Buffer> > BufferQueue;
+
+  WebMClusterParser(int64 timecode_scale,
+                    int audio_track_num,
+                    base::TimeDelta audio_default_duration,
+                    int video_track_num,
+                    base::TimeDelta video_default_duration);
+  virtual ~WebMClusterParser();
+
+  // Parses a WebM cluster element in |buf|.
+  //
+  // Returns the number of bytes parsed on success. Returns -1
+  // if a parse error occurs.
+  int Parse(const uint8* buf, int size);
+
+  const BufferQueue& audio_buffers() const { return audio_buffers_; }
+  const BufferQueue& video_buffers() const { return video_buffers_; }
+
+ private:
+  // WebMParserClient methods.
+  virtual bool OnListStart(int id);
+  virtual bool OnListEnd(int id);
+  virtual bool OnUInt(int id, int64 val);
+  virtual bool OnFloat(int id, double val);
+  virtual bool OnBinary(int id, const uint8* data, int size);
+  virtual bool OnString(int id, const std::string& str);
+  virtual bool OnSimpleBlock(int track_num, int timecode, int flags,
+                             const uint8* data, int size);
+
+  double timecode_multiplier_; // Multiplier used to convert timecodes into
+                               // microseconds.
+  int audio_track_num_;
+  base::TimeDelta audio_default_duration_;
+  int video_track_num_;
+  base::TimeDelta  video_default_duration_;
+
+  int64 last_block_timecode_;
+
+  int64 cluster_timecode_;
+  BufferQueue audio_buffers_;
+  BufferQueue video_buffers_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(WebMClusterParser);
+};
+
+}  // namespace media
+
+#endif // MEDIA_WEBM_WEBM_CLUSTER_PARSER_H_