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edgedetect: Fix chain buffer handling

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Allocate a new output buffer instead of using the input buffer
pointing to the internal cvCEdge opencv's IplImage data, which
might change, consequently changing the buffer.
This commit is contained in:
Thiago Santos 2010-04-26 16:17:23 -03:00
parent 069c1369a2
commit 42984056db
1 changed files with 8 additions and 3 deletions
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11
ext/opencv/edgedetect/gstedgedetect.c
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@ -288,6 +288,7 @@ static GstFlowReturn
gst_edgedetect_chain (GstPad * pad, GstBuffer * buf)
{
Gstedgedetect *filter;
GstBuffer *outbuf;
filter = GST_EDGEDETECT (GST_OBJECT_PARENT (pad));
@ -305,10 +306,14 @@ gst_edgedetect_chain (GstPad * pad, GstBuffer * buf)
} else {
cvCvtColor (filter->cvEdge, filter->cvCEdge, CV_GRAY2RGB);
}
gst_buffer_set_data (buf, (guint8 *) filter->cvCEdge->imageData,
filter->cvCEdge->imageSize);
return gst_pad_push (filter->srcpad, buf);
outbuf = gst_buffer_new_and_alloc (filter->cvCEdge->imageSize);
gst_buffer_copy_metadata (outbuf, buf, GST_BUFFER_COPY_ALL);
memcpy (GST_BUFFER_DATA (outbuf), filter->cvCEdge->imageData,
GST_BUFFER_SIZE (outbuf));
gst_buffer_unref (buf);
return gst_pad_push (filter->srcpad, outbuf);
}
/* entry point to initialize the plug-in