media/webm/webm_info_parser.h

   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
  12 namespace media {
  13
  14 // Parser for WebM Info element.
  15 class 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_