const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
int y_shift;
int x_shift;
+ int max_step[4];
if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)
return -1;
y_shift = desc->log2_chroma_h;
x_shift = desc->log2_chroma_w;
+ av_image_fill_max_pixsteps(max_step, NULL, desc);
if (is_yuv_planar(desc)) {
dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
} else{
if(top_band % (1<<y_shift) || left_band % (1<<x_shift))
return -1;
- if(left_band) //FIXME add support for this too
- return -1;
- dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
+ dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + (left_band * max_step[0]);
}
dst->linesize[0] = src->linesize[0];