fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
static inline int mpeg1_decode_block_intra(MpegEncContext *s,                                DCTELEM *block,                                int n){    int level, dc, diff, i, j, run;    int component;    RLTable *rl = &rl_mpeg1;    uint8_t * const scantable= s->intra_scantable.permutated;    const uint16_t *quant_matrix= s->intra_matrix;    const int qscale= s->qscale;    /* DC coef */    component = (n <= 3 ? 0 : n - 4 + 1);    diff = decode_dc(&s->gb, component);    if (diff >= 0xffff)        return -1;    dc = s->last_dc[component];    dc += diff;    s->last_dc[component] = dc;    block[0] = dc<<3;    dprintf("dc=%d diff=%d\n", dc, diff);    i = 0;    {        OPEN_READER(re, &s->gb);            /* now quantify & encode AC coefs */        for(;;) {            UPDATE_CACHE(re, &s->gb);            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);                        if(level == 127){                break;            } else if(level != 0) {                i += run;                j = scantable[i];                level= (level*qscale*quant_matrix[j])>>3;                level= (level-1)|1;                level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);                LAST_SKIP_BITS(re, &s->gb, 1);            } else {                /* escape */                run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);                UPDATE_CACHE(re, &s->gb);                level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);                if (level == -128) {                    level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);                } else if (level == 0) {                    level = SHOW_UBITS(re, &s->gb, 8)      ; LAST_SKIP_BITS(re, &s->gb, 8);                }                i += run;                j = scantable[i];                if(level<0){                    level= -level;                    level= (level*qscale*quant_matrix[j])>>3;                    level= (level-1)|1;                    level= -level;                }else{                    level= (level*qscale*quant_matrix[j])>>3;                    level= (level-1)|1;                }            }            if (i > 63){                fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);                return -1;            }            block[j] = level;        }        CLOSE_READER(re, &s->gb);    }    s->block_last_index[n] = i;   return 0;}