Method MakeFrom

src/platform/web/VideoElementReader.cpp:25–37

using namespace emscripten;

std::shared_ptr<VideoElementReader> VideoElementReader::MakeFrom(val video, int width, int height) {
  if (video == val::null() || width < 1 || height < 1) {
    return nullptr;
  }
  auto imageStream = VideoElement::MakeFrom(video, width, height);
  if (imageStream == nullptr) {
    return nullptr;
  }
  auto imageReader =
      std::shared_ptr<VideoElementReader>(new VideoElementReader(std::move(imageStream)));
  imageReader->weakThis = imageReader;
  return imageReader;
}

VideoElementReader::VideoElementReader(std::shared_ptr<ImageStream> stream)
    : ImageReader(std::move(stream)) {