swscale/utils : simplify unscaled initial test for float pixfmt

libswscale/utils.c

@@ -1810,8 +1810,7 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
     /* unscaled special cases */
     if (unscaled && !usesHFilter && !usesVFilter &&
         (c->srcRange == c->dstRange || isAnyRGB(dstFormat) ||
-         srcFormat == AV_PIX_FMT_GRAYF32 && dstFormat == AV_PIX_FMT_GRAY8 ||
-         srcFormat == AV_PIX_FMT_GRAY8 && dstFormat == AV_PIX_FMT_GRAYF32)) {
+         isFloat(srcFormat) || isFloat(dstFormat))){
         ff_get_unscaled_swscale(c);
 
         if (c->swscale) {