sws_getCachedContext 1854 ffplay.c               is->img_convert_ctx = sws_getCachedContext(is->img_convert_ctx,
sws_getCachedContext  146 libavfilter/vf_smartblur.c     f->filter_context = sws_getCachedContext(NULL,
sws_getCachedContext  317 libswscale/swscale.h struct SwsContext *sws_getCachedContext(struct SwsContext *context,