if (s->width & 0x3) return -1;
static int cyuv_decode_init(AVCodecContext *avctx){    CyuvDecodeContext *s = avctx->priv_data;    s->avctx = avctx;    s->width = avctx->width;    s->height = avctx->height;    avctx->pix_fmt = PIX_FMT_YUV411P;    avctx->has_b_frames = 0;    return 0;}