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handdetect: Use already mapped image

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No need to map again the image, it's already handled by the base class.
This commit is contained in:
Nicolas Dufresne 2014-07-04 20:55:11 -04:00
parent efde572cec
commit 09fc19b83f
2 changed files with 14 additions and 29 deletions
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39
ext/opencv/gsthanddetect.c
View file

@ -156,8 +156,6 @@ gst_handdetect_finalize (GObject * obj)
{
GstHanddetect *filter = GST_HANDDETECT (obj);
if (filter->cvImage)
cvReleaseImage (&filter->cvImage);
if (filter->cvGray)
cvReleaseImage (&filter->cvGray);
if (filter->cvStorage)
@ -368,10 +366,6 @@ gst_handdetect_set_caps (GstOpencvVideoFilter * transform,
cvReleaseImage (&filter->cvGray);
filter->cvGray =
cvCreateImage (cvSize (in_width, in_height), IPL_DEPTH_8U, 1);
if (filter->cvImage)
cvReleaseImage (&filter->cvImage);
filter->cvImage =
cvCreateImage (cvSize (in_width, in_height), IPL_DEPTH_8U, 3);
if (!filter->cvStorage)
filter->cvStorage = cvCreateMemStorage (0);
@ -392,25 +386,20 @@ gst_handdetect_transform_ip (GstOpencvVideoFilter * transform,
GstBuffer * buffer, IplImage * img)
{
GstHanddetect *filter = GST_HANDDETECT (transform);
GstMapInfo info;
CvSeq *hands;
CvRect *r;
GstStructure *s;
GstMessage *m;
int i;
buffer = gst_buffer_make_writable (buffer);
gst_buffer_map (buffer, &info, GST_MAP_READWRITE);
filter->cvImage->imageData = (char *) info.data;
/* cvt to gray colour space for hand detect */
cvCvtColor (filter->cvImage, filter->cvGray, CV_RGB2GRAY);
cvClearMemStorage (filter->cvStorage);
/* check detection cascades */
if (!filter->cvCascade_fist || !filter->cvCascade_palm)
return GST_FLOW_OK;
/* cvt to gray colour space for hand detect */
cvCvtColor (img, filter->cvGray, CV_RGB2GRAY);
cvClearMemStorage (filter->cvStorage);
/* detect FIST gesture fist */
hands =
cvHaarDetectObjects (filter->cvGray, filter->cvCascade_fist,
@ -425,18 +414,16 @@ gst_handdetect_transform_ip (GstOpencvVideoFilter * transform,
int min_distance, distance;
CvRect temp_r;
CvPoint c;
/* set frame buffer writable */
if (filter->display) {
buffer = gst_buffer_make_writable (buffer);
GST_DEBUG_OBJECT (filter, "%d FIST gestures detected\n",
(int) hands->total);
}
GST_DEBUG_OBJECT (filter, "%d FIST gestures detected\n",
(int) hands->total);
/* Go through all detected FIST gestures to get the best one
* prev_r => previous hand
* best_r => best hand in this frame
*/
/* set min_distance for init comparison */
min_distance = filter->cvImage->width + filter->cvImage->height;
min_distance = img->width + img->height;
/* Init filter->prev_r */
temp_r = cvRect (0, 0, 0, 0);
if (filter->prev_r == NULL)
@ -502,7 +489,7 @@ gst_handdetect_transform_ip (GstOpencvVideoFilter * transform,
center.y = cvRound ((filter->best_r->y + filter->best_r->height * 0.5));
radius =
cvRound ((filter->best_r->width + filter->best_r->height) * 0.25);
cvCircle (filter->cvImage, center, radius, CV_RGB (0, 0, 200), 1, 8, 0);
cvCircle (img, center, radius, CV_RGB (0, 0, 200), 1, 8, 0);
}
} else {
/* if NO FIST gesture, detecting PALM gesture */
@ -529,7 +516,7 @@ gst_handdetect_transform_ip (GstOpencvVideoFilter * transform,
* best_r => best hand in this frame
*/
/* suppose a min_distance for init comparison */
min_distance = filter->cvImage->width + filter->cvImage->height;
min_distance = img->width + img->height;
/* Init filter->prev_r */
temp_r = cvRect (0, 0, 0, 0);
if (filter->prev_r == NULL)
@ -611,11 +598,11 @@ gst_handdetect_transform_ip (GstOpencvVideoFilter * transform,
center.y = cvRound ((filter->best_r->y + filter->best_r->height * 0.5));
radius =
cvRound ((filter->best_r->width + filter->best_r->height) * 0.25);
cvCircle (filter->cvImage, center, radius, CV_RGB (0, 0, 200), 1, 8, 0);
cvCircle (img, center, radius, CV_RGB (0, 0, 200), 1, 8, 0);
}
}
}
gst_buffer_unmap (buffer, &info);
/* Push out the incoming buffer */
return GST_FLOW_OK;
}

4
ext/opencv/gsthanddetect.h
View file

@ -87,10 +87,8 @@ struct _GstHanddetect
guint roi_height;
/* opencv
* cvImage - image from video cam,
* cvGray - cvt cvImage to gray colour
* cvGray - image to gray colour
*/
IplImage *cvImage;
IplImage *cvGray;
CvHaarClassifierCascade *cvCascade_fist;
CvHaarClassifierCascade *cvCascade_palm;