fprintf(stderr, "left block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
static inline int check_intra_pred_mode(H264Context *h, int mode){    MpegEncContext * const s = &h->s;    static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};    static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};        if(!(h->top_samples_available&0x8000)){        mode= top[ mode ];        if(mode<0){            fprintf(stderr, "top block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);            return -1;        }    }        if(!(h->left_samples_available&0x8000)){        mode= left[ mode ];        if(mode<0){            fprintf(stderr, "left block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);            return -1;        }     }    return mode;}