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facedetect: Use GstOpencvVideoFilter as the base class

Browse source 
Port facedetect to use GstOpencvVideoFilter as the base class
to inherit all the goodness that GstBaseTransform/GstVideoFilter
already handles.
This commit is contained in:
Thiago Santos 2010-09-05 17:53:24 -03:00
parent dcb97354bf
commit 77fe3e6a07
3 changed files with 57 additions and 57 deletions
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6
ext/opencv/facedetect/Makefile.am
View file

@ -7,8 +7,10 @@ libgstfacedetect_la_SOURCES = gstfacedetect.c
# flags used to compile this facedetect
# add other _CFLAGS and _LIBS as needed
libgstfacedetect_la_CFLAGS = $(GST_CFLAGS) $(OPENCV_CFLAGS)
libgstfacedetect_la_LIBADD = $(GST_LIBS) $(OPENCV_LIBS)
libgstfacedetect_la_CFLAGS = $(GST_CFLAGS) $(OPENCV_CFLAGS) \
$(GSTPB_BASE_CFLAGS) -I..
libgstfacedetect_la_LIBADD = $(GST_LIBS) $(OPENCV_LIBS) $(GSTPB_BASE_LIBS) \
-lgstvideo-$(GST_MAJORMINOR)
libgstfacedetect_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
# headers we need but don't want installed

99
ext/opencv/facedetect/gstfacedetect.c
View file

@ -97,15 +97,19 @@ static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_STATIC_CAPS ("video/x-raw-rgb")
);
GST_BOILERPLATE (Gstfacedetect, gst_facedetect, GstElement, GST_TYPE_ELEMENT);
GST_BOILERPLATE (Gstfacedetect, gst_facedetect, GstOpencvVideoFilter,
GST_TYPE_OPENCV_VIDEO_FILTER);
static void gst_facedetect_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_facedetect_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_facedetect_set_caps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_facedetect_chain (GstPad * pad, GstBuffer * buf);
static gboolean gst_facedetect_set_caps (GstOpencvVideoFilter * transform,
gint in_width, gint in_height, gint in_depth, gint in_channels,
gint out_width, gint out_height, gint out_depth, gint out_channels);
static GstFlowReturn gst_facedetect_transform_ip (GstOpencvVideoFilter * base,
GstBuffer * buf, IplImage * img);
static void gst_facedetect_load_profile (Gstfacedetect * filter);
@ -115,10 +119,12 @@ gst_facedetect_finalize (GObject * obj)
{
Gstfacedetect *filter = GST_FACEDETECT (obj);
if (filter->cvImage) {
cvReleaseImage (&filter->cvImage);
if (filter->cvGray) {
cvReleaseImage (&filter->cvGray);
}
if (filter->cvStorage) {
cvReleaseMemStorage (&filter->cvStorage);
}
g_free (filter->profile);
@ -150,15 +156,20 @@ gst_facedetect_class_init (GstfacedetectClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstOpencvVideoFilterClass *gstopencvbasefilter_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstopencvbasefilter_class = (GstOpencvVideoFilterClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_facedetect_finalize);
gobject_class->set_property = gst_facedetect_set_property;
gobject_class->get_property = gst_facedetect_get_property;
gstopencvbasefilter_class->cv_trans_ip_func = gst_facedetect_transform_ip;
gstopencvbasefilter_class->cv_set_caps = gst_facedetect_set_caps;
g_object_class_install_property (gobject_class, PROP_DISPLAY,
g_param_spec_boolean ("display", "Display",
"Sets whether the detected faces should be highlighted in the output",
@ -177,23 +188,12 @@ gst_facedetect_class_init (GstfacedetectClass * klass)
static void
gst_facedetect_init (Gstfacedetect * filter, GstfacedetectClass * gclass)
{
filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
gst_pad_set_setcaps_function (filter->sinkpad,
GST_DEBUG_FUNCPTR (gst_facedetect_set_caps));
gst_pad_set_getcaps_function (filter->sinkpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
gst_pad_set_chain_function (filter->sinkpad,
GST_DEBUG_FUNCPTR (gst_facedetect_chain));
filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
gst_pad_set_getcaps_function (filter->srcpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
filter->profile = g_strdup(DEFAULT_PROFILE);
filter->display = TRUE;
gst_facedetect_load_profile (filter);
gst_opencv_video_filter_set_in_place (GST_OPENCV_VIDEO_FILTER_CAST (filter),
TRUE);
}
static void
@ -240,43 +240,42 @@ gst_facedetect_get_property (GObject * object, guint prop_id,
/* this function handles the link with other elements */
static gboolean
gst_facedetect_set_caps (GstPad * pad, GstCaps * caps)
gst_facedetect_set_caps (GstOpencvVideoFilter * transform, gint in_width,
gint in_height, gint in_depth, gint in_channels,
gint out_width, gint out_height, gint out_depth, gint out_channels)
{
Gstfacedetect *filter;
GstPad *otherpad;
gint width, height;
GstStructure *structure;
filter = GST_FACEDETECT (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "width", &width);
gst_structure_get_int (structure, "height", &height);
filter = GST_FACEDETECT (transform);
filter->cvImage = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 3);
filter->cvGray = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 1);
filter->cvStorage = cvCreateMemStorage (0);
if (filter->cvGray)
cvReleaseImage (&filter->cvGray);
otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad;
gst_object_unref (filter);
filter->cvGray = cvCreateImage (cvSize (in_width, in_height), IPL_DEPTH_8U,
1);
return gst_pad_set_caps (otherpad, caps);
if (!filter->cvStorage)
filter->cvStorage = cvCreateMemStorage (0);
else
cvClearMemStorage (filter->cvStorage);
return TRUE;
}
/* chain function
* this function does the actual processing
*/
static GstFlowReturn
gst_facedetect_chain (GstPad * pad, GstBuffer * buf)
gst_facedetect_transform_ip (GstOpencvVideoFilter * base, GstBuffer * buf,
IplImage * img)
{
Gstfacedetect *filter;
CvSeq *faces;
int i;
filter = GST_FACEDETECT (GST_OBJECT_PARENT (pad));
filter = GST_FACEDETECT (base);
filter->cvImage->imageData = (char *) GST_BUFFER_DATA (buf);
cvCvtColor (filter->cvImage, filter->cvGray, CV_RGB2GRAY);
cvCvtColor (img, filter->cvGray, CV_RGB2GRAY);
cvClearMemStorage (filter->cvStorage);
if (filter->cvCascade) {
@ -284,10 +283,6 @@ gst_facedetect_chain (GstPad * pad, GstBuffer * buf)
cvHaarDetectObjects (filter->cvGray, filter->cvCascade,
filter->cvStorage, 1.1, 2, 0, cvSize (30, 30));
if (filter->display && faces && faces->total > 0) {
buf = gst_buffer_make_writable (buf);
}
for (i = 0; i < (faces ? faces->total : 0); i++) {
CvRect *r = (CvRect *) cvGetSeqElem (faces, i);
@ -301,20 +296,24 @@ gst_facedetect_chain (GstPad * pad, GstBuffer * buf)
gst_element_post_message (GST_ELEMENT (filter), m);
if (filter->display) {
CvPoint center;
int radius;
center.x = cvRound ((r->x + r->width * 0.5));
center.y = cvRound ((r->y + r->height * 0.5));
radius = cvRound ((r->width + r->height) * 0.25);
cvCircle (filter->cvImage, center, radius, CV_RGB (255, 32, 32), 3, 8,
0);
if (gst_buffer_is_writable (buf)) {
CvPoint center;
int radius;
center.x = cvRound ((r->x + r->width * 0.5));
center.y = cvRound ((r->y + r->height * 0.5));
radius = cvRound ((r->width + r->height) * 0.25);
cvCircle (img, center, radius, CV_RGB (255, 32, 32), 3, 8, 0);
} else {
GST_DEBUG_OBJECT (filter, "Buffer is not writable, not drawing "
"circles for faces");
}
}
}
}
return gst_pad_push (filter->srcpad, buf);
return GST_FLOW_OK;
}

9
ext/opencv/facedetect/gstfacedetect.h
View file

@ -48,6 +48,7 @@
#include <gst/gst.h>
#include <cv.h>
#include "gstopencvvideofilter.h"
G_BEGIN_DECLS
/* #defines don't like whitespacey bits */
@ -66,22 +67,20 @@ typedef struct _GstfacedetectClass GstfacedetectClass;
struct _Gstfacedetect
{
GstElement element;
GstPad *sinkpad, *srcpad;
GstOpencvVideoFilter element;
gboolean display;
gchar *profile;
IplImage *cvImage, *cvGray;
IplImage *cvGray;
CvHaarClassifierCascade *cvCascade;
CvMemStorage *cvStorage;
};
struct _GstfacedetectClass
{
GstElementClass parent_class;
GstOpencvVideoFilterClass parent_class;
};
GType gst_facedetect_get_type (void);