static int mb_var_thread(AVCodecContext *c, void *arg){ MpegEncContext *s= *(void**)arg; int mb_x, mb_y; for(mb_y=s->start_mb_y; mb_y < s->end_mb_y; mb_y++) { for(mb_x=0; mb_x < s->mb_width; mb_x++) { int xx = mb_x * 16; int yy = mb_y * 16; uint8_t *pix = s->new_picture.f.data[0] + (yy * s->linesize) + xx; int varc; int sum = s->dsp.pix_sum(pix, s->linesize); varc = (s->dsp.pix_norm1(pix, s->linesize) - (((unsigned)sum*sum)>>8) + 500 + 128)>>8; s->current_picture.mb_var [s->mb_stride * mb_y + mb_x] = varc; s->current_picture.mb_mean[s->mb_stride * mb_y + mb_x] = (sum+128)>>8; s->me.mb_var_sum_temp += varc; } } return 0; }