Method updateStaticTimeRanges

src/base/BitmapComposition.cpp:40–75

}

void BitmapComposition::updateStaticTimeRanges() {
  staticTimeRanges = {};
  if (duration <= 1) {
    return;
  }
  if (!sequences.empty()) {
    Frame start = 0;
    Frame end = 0;
    auto sequence = sequences[0];
    for (size_t i = 1; i < sequences.size(); i++) {
      auto item = sequences[i];
      if (item->frameRate > sequence->frameRate) {
        sequence = item;
      }
    }
    float timeScale = frameRate / sequence->frameRate;
    for (size_t index = 0; index < sequence->frames.size(); index++) {
      if (sequence->isEmptyBitmapFrame(index)) {
        end = index;
      } else {
        if (end > start) {
          auto range = MakeTimeRange(start, end, timeScale);
          staticTimeRanges.push_back(range);
        }
        start = end = index;
      }
    }
    if (end > start) {
      auto range = MakeTimeRange(start, end, timeScale);
      staticTimeRanges.push_back(range);
    }
  } else {
    TimeRange range = {0, duration - 1};
    staticTimeRanges.push_back(range);
  }
}

bool BitmapComposition::hasImageContent() const {
  return true;