bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
                      SkYUVColorSpace* colorSpace) override {
     SkMemoryStream stream(fData->data(), fData->size(), false);
     return fDecoder->decodeYUV8Planes(&stream, sizes, planes, rowBytes, colorSpace);
 }