media/filters/webvtt_util.h

   1 // Copyright 2013 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_FILTERS_WEBVTT_UTIL_H_
   6 #define MEDIA_FILTERS_WEBVTT_UTIL_H_
   7
   8 #include <vector>
   9
  10 namespace media {
  11
  12 // Utility function to create side data item for decoder buffer.
  13 template<typename T>
  14 void MakeSideData(T id_begin, T id_end,
  15                   T settings_begin, T settings_end,
  16                   std::vector<uint8>* side_data) {
  17   // The DecoderBuffer only supports a single side data item. In the case of
  18   // a WebVTT cue, we can have potentially two side data items. In order to
  19   // avoid disrupting DecoderBuffer any more than we need to, we copy both
  20   // side data items onto a single one, and terminate each with a NUL marker.
  21   side_data->clear();
  22   side_data->insert(side_data->end(), id_begin, id_end);
  23   side_data->push_back(0);
  24   side_data->insert(side_data->end(), settings_begin, settings_end);
  25   side_data->push_back(0);
  26 }
  27
  28 }  // namespace media
  29
  30 #endif  // MEDIA_FILTERS_WEBVTT_UTIL_H_