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deinterlace: Fix greedyh crash for alternate-field interlacing

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Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/2645

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5172>
This commit is contained in:
Vivia Nikolaidou 2023-08-10 11:38:32 +03:00 committed by GStreamer Marge Bot
parent 9d89bad731
commit 6145a5c7cb
1 changed files with 18 additions and 9 deletions
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23
subprojects/gst-plugins-good/gst/deinterlace/tvtime/greedyh.c
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@ -725,26 +725,35 @@ deinterlace_frame_di_greedyh_plane (GstDeinterlaceMethodGreedyH * self,
guint8 *Dest = GST_VIDEO_FRAME_COMP_DATA (outframe, plane);
gint RowStride = GST_VIDEO_FRAME_COMP_STRIDE (outframe, plane);
gint FieldHeight = GST_VIDEO_FRAME_COMP_HEIGHT (outframe, plane) / 2;
gint Pitch = RowStride * 2;
gint Pitch;
const guint8 *L1; // ptr to Line1, of 3
const guint8 *L2; // ptr to Line2, the weave line
const guint8 *L3; // ptr to Line3
const guint8 *L2P; // ptr to prev Line2
gint InfoIsOdd;
gint Line;
const GstVideoFrame *frame;
L1 = GST_VIDEO_FRAME_COMP_DATA (history[cur_field_idx].frame, plane);
frame = history[cur_field_idx].frame;
L1 = GST_VIDEO_FRAME_COMP_DATA (frame, plane);
L2 = GST_VIDEO_FRAME_COMP_DATA (history[cur_field_idx + 1].frame, plane);
L2P = GST_VIDEO_FRAME_COMP_DATA (history[cur_field_idx - 1].frame, plane);
if (GST_VIDEO_INFO_INTERLACE_MODE (&frame->info) ==
GST_VIDEO_INTERLACE_MODE_ALTERNATE) {
Pitch = RowStride;
} else {
Pitch = RowStride * 2;
if (history[cur_field_idx].flags & PICTURE_INTERLACED_BOTTOM)
L1 += RowStride;
L2 = GST_VIDEO_FRAME_COMP_DATA (history[cur_field_idx + 1].frame, plane);
if (history[cur_field_idx + 1].flags & PICTURE_INTERLACED_BOTTOM)
L2 += RowStride;
L3 = L1 + Pitch;
L2P = GST_VIDEO_FRAME_COMP_DATA (history[cur_field_idx - 1].frame, plane);
if (history[cur_field_idx - 1].flags & PICTURE_INTERLACED_BOTTOM)
L2P += RowStride;
}
L3 = L1 + Pitch;
// copy first even line no matter what, and the first odd line if we're
// processing an EVEN field. (note diff from other deint rtns.)