convert_mono_to_YCbCr420 283 libheif-1.3.2/libheif/heif_image.cc out_img = convert_mono_to_YCbCr420(); convert_mono_to_YCbCr420 119 libheif-1.3.2/libheif/heif_image.h std::shared_ptr<HeifPixelImage> convert_mono_to_YCbCr420() const;