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videosignal: add bound checks

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This commit is contained in:
René Stadler 2009-09-06 02:44:05 +03:00
parent 53defab4b2
commit 5b87b537be
2 changed files with 25 additions and 2 deletions
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9
gst/videosignal/gstvideodetect.c
View file

@ -231,6 +231,7 @@ gst_video_detect_420 (GstVideoDetect * videodetect, GstBuffer * buffer)
{
gdouble brightness;
gint i, pw, ph, stride, width, height;
gint req_width, req_height;
guint8 *d, *data;
guint pattern_data;
@ -243,6 +244,14 @@ gst_video_detect_420 (GstVideoDetect * videodetect, GstBuffer * buffer)
ph = videodetect->pattern_height;
stride = GST_VIDEO_I420_Y_ROWSTRIDE (width);
req_width =
(videodetect->pattern_count + videodetect->pattern_data_count) * pw +
videodetect->left_offset;
req_height = videodetect->bottom_offset + ph;
if (req_width > width || req_height > height) {
goto no_pattern;
}
/* analyse the bottom left pixels */
for (i = 0; i < videodetect->pattern_count; i++) {
d = data;

18
gst/videosignal/gstvideomark.c
View file

@ -140,10 +140,11 @@ gst_video_mark_draw_box (GstVideoMark * videomark, guint8 * data,
}
}
static void
static GstFlowReturn
gst_video_mark_420 (GstVideoMark * videomark, GstBuffer * buffer)
{
gint i, pw, ph, stride, width, height;
gint req_width, req_height;
guint8 *d, *data;
guint pattern_shift;
guint8 color;
@ -157,6 +158,17 @@ gst_video_mark_420 (GstVideoMark * videomark, GstBuffer * buffer)
ph = videomark->pattern_height;
stride = GST_VIDEO_I420_Y_ROWSTRIDE (width);
req_width =
(videomark->pattern_count + videomark->pattern_data_count) * pw +
videomark->left_offset;
req_height = videomark->bottom_offset + ph;
if (req_width > width || req_height > height) {
GST_ELEMENT_ERROR (videomark, STREAM, WRONG_TYPE, (NULL),
("videomark pattern doesn't fit video, need at least %ix%i (stream has %ix%i)",
req_width, req_height, width, height));
return GST_FLOW_ERROR;
}
/* draw the bottom left pixels */
for (i = 0; i < videomark->pattern_count; i++) {
d = data;
@ -198,6 +210,8 @@ gst_video_mark_420 (GstVideoMark * videomark, GstBuffer * buffer)
pattern_shift >>= 1;
}
return GST_FLOW_OK;
}
static GstFlowReturn
@ -209,7 +223,7 @@ gst_video_mark_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
videomark = GST_VIDEO_MARK (trans);
if (videomark->enabled)
gst_video_mark_420 (videomark, buf);
return gst_video_mark_420 (videomark, buf);
return ret;
}