Esempi in C++ (Cpp) per GST_EDGE_DETECT

Esempio n. 1

File: gstedgedetect.c Progetto: dylansong77/gstreamer

/* chain function
 * this function does the actual processing
 */
static GstFlowReturn
gst_edge_detect_chain (GstPad * pad, GstBuffer * buf)
{
  GstEdgeDetect *filter;
  GstBuffer *outbuf;

  filter = GST_EDGE_DETECT (GST_OBJECT_PARENT (pad));

  filter->cvImage->imageData = (char *) GST_BUFFER_DATA (buf);

  cvCvtColor (filter->cvImage, filter->cvGray, CV_RGB2GRAY);
  cvSmooth (filter->cvGray, filter->cvEdge, CV_BLUR, 3, 3, 0, 0);
  cvNot (filter->cvGray, filter->cvEdge);
  cvCanny (filter->cvGray, filter->cvEdge, filter->threshold1,
      filter->threshold2, filter->aperture);

  cvZero (filter->cvCEdge);
  if (filter->mask) {
    cvCopy (filter->cvImage, filter->cvCEdge, filter->cvEdge);
  } else {
    cvCvtColor (filter->cvEdge, filter->cvCEdge, CV_GRAY2RGB);
  }

  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);
}

Esempio n. 2

File: gstedgedetect.c Progetto: dylansong77/gstreamer

/* Clean up */
static void
gst_edge_detect_finalize (GObject * obj)
{
  GstEdgeDetect *filter = GST_EDGE_DETECT (obj);

  if (filter->cvImage != NULL) {
    cvReleaseImage (&filter->cvImage);
    cvReleaseImage (&filter->cvCEdge);
    cvReleaseImage (&filter->cvGray);
    cvReleaseImage (&filter->cvEdge);
  }

  G_OBJECT_CLASS (parent_class)->finalize (obj);
}

Esempio n. 3

File: gstedgedetect.c Progetto: Distrotech/gst-plugins-bad

/* this function handles the link with other elements */
static gboolean
gst_edge_detect_handle_sink_event (GstPad * pad, GstObject * parent,
    GstEvent * event)
{
  GstEdgeDetect *filter;
  gint width, height;
  GstStructure *structure;
  gboolean res = TRUE;

  filter = GST_EDGE_DETECT (parent);

  switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_CAPS:
    {
      GstCaps *caps;
      gst_event_parse_caps (event, &caps);

      structure = gst_caps_get_structure (caps, 0);
      gst_structure_get_int (structure, "width", &width);
      gst_structure_get_int (structure, "height", &height);

      if (filter->cvImage != NULL) {
        cvReleaseImage (&filter->cvImage);
        cvReleaseImage (&filter->cvCEdge);
        cvReleaseImage (&filter->cvGray);
        cvReleaseImage (&filter->cvEdge);
      }

      filter->cvImage = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 3);
      filter->cvCEdge = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 3);
      filter->cvGray = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 1);
      filter->cvEdge = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 1);
      break;
    }
    default:
      break;
  }

  res = gst_pad_event_default (pad, parent, event);

  return res;

}

Esempio n. 4

File: gstedgedetect.c Progetto: Distrotech/gst-plugins-bad

/* chain function
 * this function does the actual processing
 */
static GstFlowReturn
gst_edge_detect_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
  GstEdgeDetect *filter;
  GstBuffer *outbuf;
  GstMapInfo in_info;
  GstMapInfo out_info;

  filter = GST_EDGE_DETECT (parent);

  buf = gst_buffer_make_writable (buf);
  gst_buffer_map (buf, &in_info, GST_MAP_WRITE);
  filter->cvImage->imageData = (char *) in_info.data;

  cvCvtColor (filter->cvImage, filter->cvGray, CV_RGB2GRAY);
  cvSmooth (filter->cvGray, filter->cvEdge, CV_BLUR, 3, 3, 0, 0);
  cvNot (filter->cvGray, filter->cvEdge);
  cvCanny (filter->cvGray, filter->cvEdge, filter->threshold1,
      filter->threshold2, filter->aperture);

  cvZero (filter->cvCEdge);
  if (filter->mask) {
    cvCopy (filter->cvImage, filter->cvCEdge, filter->cvEdge);
  } else {
    cvCvtColor (filter->cvEdge, filter->cvCEdge, CV_GRAY2RGB);
  }

  outbuf = gst_buffer_new_and_alloc (filter->cvCEdge->imageSize);
  gst_buffer_copy_into (outbuf, buf, GST_BUFFER_COPY_METADATA, 0, -1);

  gst_buffer_map (outbuf, &out_info, GST_MAP_WRITE);
  memcpy (out_info.data, filter->cvCEdge->imageData,
      gst_buffer_get_size (outbuf));

  gst_buffer_unmap (buf, &in_info);
  gst_buffer_unmap (outbuf, &out_info);
  gst_buffer_unref (buf);
  return gst_pad_push (filter->srcpad, outbuf);
}

Esempio n. 5

File: gstedgedetect.c Progetto: dylansong77/gstreamer

/* this function handles the link with other elements */
static gboolean
gst_edge_detect_set_caps (GstPad * pad, GstCaps * caps)
{
  GstEdgeDetect *filter;
  GstPad *otherpad;
  gint width, height;
  GstStructure *structure;

  filter = GST_EDGE_DETECT (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->cvImage = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 3);
  filter->cvCEdge = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 3);
  filter->cvGray = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 1);
  filter->cvEdge = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 1);

  otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad;
  gst_object_unref (filter);

  return gst_pad_set_caps (otherpad, caps);
}

Esempio n. 6

File: gstedgedetect.c Progetto: dylansong77/gstreamer

static void
gst_edge_detect_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec)
{
  GstEdgeDetect *filter = GST_EDGE_DETECT (object);

  switch (prop_id) {
    case PROP_MASK:
      g_value_set_boolean (value, filter->mask);
      break;
    case PROP_THRESHOLD1:
      g_value_set_int (value, filter->threshold1);
      break;
    case PROP_THRESHOLD2:
      g_value_set_int (value, filter->threshold2);
      break;
    case PROP_APERTURE:
      g_value_set_int (value, filter->aperture);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}