1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef MEDIA_WEBM_WEBM_INFO_PARSER_H_
6#define MEDIA_WEBM_WEBM_INFO_PARSER_H_
7
8#include "base/compiler_specific.h"
9#include "media/base/media_export.h"
10#include "media/webm/webm_parser.h"
11
12namespace media {
13
14// Parser for WebM Info element.
15class MEDIA_EXPORT WebMInfoParser : public WebMParserClient {
16 public:
17  WebMInfoParser();
18  virtual ~WebMInfoParser();
19
20  // Parses a WebM Info element in |buf|.
21  //
22  // Returns -1 if the parse fails.
23  // Returns 0 if more data is needed.
24  // Returns the number of bytes parsed on success.
25  int Parse(const uint8* buf, int size);
26
27  int64 timecode_scale() const { return timecode_scale_; }
28  double duration() const { return duration_; }
29
30 private:
31  // WebMParserClient methods
32  virtual WebMParserClient* OnListStart(int id) OVERRIDE;
33  virtual bool OnListEnd(int id) OVERRIDE;
34  virtual bool OnUInt(int id, int64 val) OVERRIDE;
35  virtual bool OnFloat(int id, double val) OVERRIDE;
36  virtual bool OnBinary(int id, const uint8* data, int size) OVERRIDE;
37  virtual bool OnString(int id, const std::string& str) OVERRIDE;
38
39  int64 timecode_scale_;
40  double duration_;
41
42  DISALLOW_COPY_AND_ASSIGN(WebMInfoParser);
43};
44
45}  // namespace media
46
47#endif  // MEDIA_WEBM_WEBM_INFO_PARSER_H_
48