media/formats/webm/webm_info_parser.h

   1 // Copyright 2014 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_FORMATS_WEBM_WEBM_INFO_PARSER_H_
   6 #define MEDIA_FORMATS_WEBM_WEBM_INFO_PARSER_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/time/time.h"
  10 #include "media/base/media_export.h"
  11 #include "media/formats/webm/webm_parser.h"
  12
  13 namespace media {
  14
  15 // Parser for WebM Info element.
  16 class MEDIA_EXPORT WebMInfoParser : public WebMParserClient {
  17  public:
  18   WebMInfoParser();
  19   ~WebMInfoParser() override;
  20
  21   // Parses a WebM Info element in |buf|.
  22   //
  23   // Returns -1 if the parse fails.
  24   // Returns 0 if more data is needed.
  25   // Returns the number of bytes parsed on success.
  26   int Parse(const uint8* buf, int size);
  27
  28   int64 timecode_scale() const { return timecode_scale_; }
  29   double duration() const { return duration_; }
  30   base::Time date_utc() const { return date_utc_; }
  31
  32  private:
  33   // WebMParserClient methods
  34   WebMParserClient* OnListStart(int id) override;
  35   bool OnListEnd(int id) override;
  36   bool OnUInt(int id, int64 val) override;
  37   bool OnFloat(int id, double val) override;
  38   bool OnBinary(int id, const uint8* data, int size) override;
  39   bool OnString(int id, const std::string& str) override;
  40
  41   int64 timecode_scale_;
  42   double duration_;
  43   base::Time date_utc_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(WebMInfoParser);
  46 };
  47
  48 }  // namespace media
  49
  50 #endif  // MEDIA_FORMATS_WEBM_WEBM_INFO_PARSER_H_