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video-converter: fix chroma subsampling

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Also adjust the output line number with the offset.
This commit is contained in:
Wim Taymans 2015-02-24 17:20:53 +01:00
parent cb5ec197da
commit 5744b7995c
1 changed files with 4 additions and 2 deletions
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6
gst-libs/gst/video/video-converter.c
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@ -2161,8 +2161,8 @@ get_dest_line (GstLineCache * cache, gint idx, gpointer user_data)
cline = CLAMP (idx, 0, convert->out_maxheight - 1);
GST_DEBUG ("get dest line %d", cline);
line = FRAME_GET_LINE (convert->dest, cline);
GST_DEBUG ("get dest line %d %p", cline, line);
if (convert->borderline) {
gint r_border = (out_x + convert->out_width) * pstride;
@ -2212,8 +2212,10 @@ do_upsample_lines (GstLineCache * cache, gint out_line, gint in_line,
n_lines = convert->up_n_lines;
start_line = in_line;
if (start_line < n_lines + convert->up_offset)
if (start_line < n_lines + convert->up_offset) {
start_line += convert->up_offset;
out_line += convert->up_offset;
}
/* get the lines needed for chroma upsample */
lines = gst_line_cache_get_lines (cache->prev, out_line, start_line, n_lines);