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opencv: do pyramidsegment's transformation in place

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Run the transform function of pyramidsegment in place, reusing the image
data as both source and destination in cvPyrSegmentation. This avoids
copying the image back and forth and the extra memory.
This commit is contained in:
Luis de Bethencourt 2016-01-08 12:39:29 +00:00
parent a4980a33a1
commit 14dd6b7088
2 changed files with 8 additions and 22 deletions
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28
ext/opencv/gstpyramidsegment.cpp
View file

@ -108,8 +108,8 @@ static void gst_pyramid_segment_set_property (GObject * object, guint prop_id,
static void gst_pyramid_segment_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstFlowReturn gst_pyramid_segment_transform (GstOpencvVideoFilter * base,
GstBuffer * buf, IplImage * img, GstBuffer * outbuf, IplImage * outimg);
static GstFlowReturn gst_pyramid_segment_transform_ip (GstOpencvVideoFilter *
base, GstBuffer * buf, IplImage * img);
/* Clean up */
static void
@ -137,7 +137,8 @@ gst_pyramid_segment_class_init (GstPyramidSegmentClass * klass)
gobject_class->set_property = gst_pyramid_segment_set_property;
gobject_class->get_property = gst_pyramid_segment_get_property;
gstopencvbasefilter_class->cv_trans_func = gst_pyramid_segment_transform;
gstopencvbasefilter_class->cv_trans_ip_func =
gst_pyramid_segment_transform_ip;
g_object_class_install_property (gobject_class, PROP_SILENT,
g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
@ -187,7 +188,7 @@ gst_pyramid_segment_init (GstPyramidSegment * filter)
filter->level = 4;
gst_opencv_video_filter_set_in_place (GST_OPENCV_VIDEO_FILTER_CAST (filter),
FALSE);
TRUE);
}
static void
@ -244,27 +245,14 @@ gst_pyramid_segment_get_property (GObject * object, guint prop_id,
* this function does the actual processing
*/
static GstFlowReturn
gst_pyramid_segment_transform (GstOpencvVideoFilter * base, GstBuffer * buf,
IplImage * img, GstBuffer * outbuf, IplImage * outimg)
gst_pyramid_segment_transform_ip (GstOpencvVideoFilter * base, GstBuffer * buf,
IplImage * img)
{
GstPyramidSegment *filter = GST_PYRAMID_SEGMENT (base);
GstMapInfo outinfo;
filter->cvSegmentedImage = cvCloneImage (img);
cvPyrSegmentation (img, filter->cvSegmentedImage, filter->storage,
cvPyrSegmentation (img, img, filter->storage,
&(filter->comp), filter->level, filter->threshold1, filter->threshold2);
/* TODO look if there is a way in opencv to reuse the image data and
* delete only the struct headers. Would avoid a memcpy here */
gst_buffer_map (outbuf, &outinfo, GST_MAP_WRITE);
memcpy (outinfo.data, filter->cvSegmentedImage->imageData,
gst_buffer_get_size (outbuf));
cvReleaseImage (&filter->cvSegmentedImage);
g_assert (filter->cvSegmentedImage == NULL);
return GST_FLOW_OK;
}

2
ext/opencv/gstpyramidsegment.h
View file

@ -77,8 +77,6 @@ struct _GstPyramidSegment
gboolean silent;
IplImage *cvSegmentedImage;
CvMemStorage *storage;
CvSeq *comp;