Adding ChunkDemuxer implementation.

media/webm/webm_tracks_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_TRACKS_PARSER_H_
+#define MEDIA_WEBM_WEBM_TRACKS_PARSER_H_
+
+#include "media/webm/webm_parser.h"
+
+#include "base/time.h"
+
+namespace media {
+
+// Parser for WebM Tracks element.
+class WebMTracksParser : public WebMParserClient {
+ public:
+  WebMTracksParser(int64 timecode_scale);
+  virtual ~WebMTracksParser();
+
+  // Parses a WebM Tracks element in |buf|.
+  //
+  // Returns the number of bytes parsed on success. Returns -1
+  // on error.
+  int Parse(const uint8* buf, int size);
+
+  int64 audio_track_num() const { return audio_track_num_; }
+  base::TimeDelta audio_default_duration() const {
+    return audio_default_duration_;
+  }
+
+  int64 video_track_num() const { return video_track_num_; }
+  base::TimeDelta video_default_duration() const {
+    return video_default_duration_;
+  }
+
+ 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);
+  int64 timecode_scale_;
+
+  int64 track_type_;
+  int64 track_num_;
+  int64 track_default_duration_;
+  int64 audio_track_num_;
+  base::TimeDelta audio_default_duration_;
+  int64 video_track_num_;
+  base::TimeDelta video_default_duration_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(WebMTracksParser);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_WEBM_WEBM_TRACKS_PARSER_H_