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video-scaler: fix YUY2 scaling some more

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Take into account the different steps between Y and UV when calculating
the line size for vertical resampling or else we might not resample
enough pixels and leave bad lines.

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=747790
This commit is contained in:
Wim Taymans 2015-04-21 13:31:44 +02:00
parent 8f82ee70f9
commit 0588c9a53f
1 changed files with 10 additions and 3 deletions
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13
gst-libs/gst/video/video-scaler.c
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@ -1480,16 +1480,23 @@ gst_video_scaler_2d (GstVideoScaler * hscale, GstVideoScaler * vscale,
vfunc (vscale, lines, LINE (dest, dest_stride, i), i, width, n_elems);
}
} else {
guint vx, vw;
guint vx, vw, w1;
guint h_taps;
h_taps = hscale->resampler.max_taps;
w1 = x + width - 1;
vx = (hscale->inc * x) >> 16;
vx = MIN (vx, hscale->resampler.offset[x]);
vw = (hscale->inc * (x + width)) >> 16;
vw = MAX (vw,
hscale->resampler.offset[x + width - 1] + (mult * h_taps));
if (hscale->merged) {
if ((w1 & 1) == hscale->out_y_offset)
vw = MAX (vw, hscale->resampler.offset[w1] + (2 * h_taps));
else
vw = MAX (vw, hscale->resampler.offset[w1] + (4 * h_taps));
} else {
vw = MAX (vw, hscale->resampler.offset[w1] + h_taps);
}
vw += 1;
if (vscale->tmpwidth < vw)