Adding ChunkDemuxer implementation.

media/webm/webm_info_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_INFO_PARSER_H_
+#define MEDIA_WEBM_WEBM_INFO_PARSER_H_
+
+#include "media/webm/webm_parser.h"
+
+namespace media {
+
+// Parser for WebM Info element.
+class WebMInfoParser : public WebMParserClient {
+ public:
+  WebMInfoParser();
+  virtual ~WebMInfoParser();
+
+  // Parses a WebM Info element in |buf|.
+  //
+  // Returns the number of bytes parsed on success. Returns -1
+  // on error.
+  int Parse(const uint8* buf, int size);
+
+  int64 timecode_scale() const { return timecode_scale_; }
+  double duration() const { return 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_;
+  double duration_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebMInfoParser);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_WEBM_WEBM_INFO_PARSER_H_