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,