C++ (Cpp) GST_V4L2_IS_OVERLAY Examples

Example #1

File: gstv4l2src.c Project: Sandec/openjfx-8u-dev-rt

static gboolean
gst_v4l2src_iface_supported (GstImplementsInterface * iface, GType iface_type)
{
  GstV4l2Object *v4l2object = GST_V4L2SRC (iface)->v4l2object;

#ifdef HAVE_XVIDEO
  g_assert (iface_type == GST_TYPE_TUNER ||
      iface_type == GST_TYPE_X_OVERLAY ||
      iface_type == GST_TYPE_COLOR_BALANCE ||
      iface_type == GST_TYPE_VIDEO_ORIENTATION);
#else
  g_assert (iface_type == GST_TYPE_TUNER ||
      iface_type == GST_TYPE_COLOR_BALANCE ||
      iface_type == GST_TYPE_VIDEO_ORIENTATION);
#endif

  if (v4l2object->video_fd == -1)
    return FALSE;

#ifdef HAVE_XVIDEO
  if (iface_type == GST_TYPE_X_OVERLAY && !GST_V4L2_IS_OVERLAY (v4l2object))
    return FALSE;
#endif

  return TRUE;
}

Example #2

File: gstv4l2xoverlay.c Project: matsu/gst-plugins-good

/**
 * gst_v4l2_xoverlay_prepare_xwindow_id:
 * @v4l2object: the v4l2object
 * @required: %TRUE if display is required (ie. TRUE for v4l2sink, but
 *   FALSE for any other element with optional overlay capabilities)
 *
 * Helper function to create a windo if none is set from the application.
 */
void
gst_v4l2_xoverlay_prepare_xwindow_id (GstV4l2Object * v4l2object,
    gboolean required)
{
  if (!GST_V4L2_IS_OVERLAY (v4l2object))
    return;

  gst_x_overlay_prepare_xwindow_id (GST_X_OVERLAY (v4l2object->element));

  if (required && !v4l2object->xwindow_id) {
    GstV4l2Xv *v4l2xv;
    Window win;
    int width, height;
    long event_mask;

    if (!v4l2object->xv && GST_V4L2_IS_OPEN (v4l2object))
      gst_v4l2_xoverlay_open (v4l2object);

    v4l2xv = v4l2object->xv;

    /* if xoverlay is not supported, just bail */
    if (!v4l2xv)
      return;

    /* xoverlay is supported, but we don't have a window.. so create one */
    GST_DEBUG_OBJECT (v4l2object->element, "creating window");

    g_mutex_lock (v4l2xv->mutex);

    width = XDisplayWidth (v4l2xv->dpy, DefaultScreen (v4l2xv->dpy));
    height = XDisplayHeight (v4l2xv->dpy, DefaultScreen (v4l2xv->dpy));
    GST_DEBUG_OBJECT (v4l2object->element, "dpy=%p", v4l2xv->dpy);

    win = XCreateSimpleWindow (v4l2xv->dpy,
        DefaultRootWindow (v4l2xv->dpy),
        0, 0, width, height, 0, 0,
        XBlackPixel (v4l2xv->dpy, DefaultScreen (v4l2xv->dpy)));

    GST_DEBUG_OBJECT (v4l2object->element, "win=%lu", win);

    event_mask = ExposureMask | StructureNotifyMask;
    if (GST_IS_NAVIGATION (v4l2object->element)) {
      event_mask |= PointerMotionMask |
          KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask;
    }
    XSelectInput (v4l2xv->dpy, win, event_mask);
    v4l2xv->event_id = g_timeout_add (45, event_refresh, v4l2object);

    XMapRaised (v4l2xv->dpy, win);

    XSync (v4l2xv->dpy, FALSE);

    g_mutex_unlock (v4l2xv->mutex);

    GST_DEBUG_OBJECT (v4l2object->element, "got window");

    gst_v4l2_xoverlay_set_window_handle (v4l2object, win);
  }
}

Example #3

File: gstv4l2xoverlay.c Project: z7z8th/gstreamer-ducati

/**
 * gst_v4l2_xoverlay_prepare_xwindow_id:
 * @v4l2object: the v4l2object
 * @required: %TRUE if display is required (ie. TRUE for v4l2sink, but
 *   FALSE for any other element with optional overlay capabilities)
 *
 * Helper function to create a windo if none is set from the application.
 */
void
gst_v4l2_xoverlay_prepare_xwindow_id (GstV4l2Object * v4l2object,
    gboolean required)
{
  if (!GST_V4L2_IS_OVERLAY (v4l2object))
    return;

  gst_x_overlay_prepare_xwindow_id (GST_X_OVERLAY (v4l2object->element));

  if (required && !v4l2object->xwindow_id) {
    GstV4l2Xv *v4l2xv;
    Window win;
    int width, height;

    if (!v4l2object->xv && GST_V4L2_IS_OPEN (v4l2object))
      gst_v4l2_xoverlay_open (v4l2object);

    v4l2xv = v4l2object->xv;

    /* if xoverlay is not supported, just bail */
    if (!v4l2xv)
      return;

    /* xoverlay is supported, but we don't have a window.. so create one */
    GST_DEBUG_OBJECT (v4l2object->element, "creating window");

    g_mutex_lock (v4l2xv->mutex);

    width = XDisplayWidth (v4l2xv->dpy, DefaultScreen (v4l2xv->dpy));
    height = XDisplayHeight (v4l2xv->dpy, DefaultScreen (v4l2xv->dpy));
    GST_DEBUG_OBJECT (v4l2object->element, "dpy=%p", v4l2xv->dpy);

    win = XCreateSimpleWindow (v4l2xv->dpy,
        DefaultRootWindow (v4l2xv->dpy),
        0, 0, width, height, 0, 0,
        XBlackPixel (v4l2xv->dpy, DefaultScreen (v4l2xv->dpy)));

    GST_DEBUG_OBJECT (v4l2object->element, "win=%lu", win);

    XMapRaised (v4l2xv->dpy, win);
    XSync (v4l2xv->dpy, FALSE);

    v4l2xv->internal_window = TRUE;

    g_mutex_unlock (v4l2xv->mutex);

    GST_DEBUG_OBJECT (v4l2object->element, "got window");

    gst_v4l2_xoverlay_set_window_handle (v4l2object, win);
  }
}