/**
* 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);
}
}
/**
* 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);
}
}
static void
gst_v4l2_xoverlay_close (GstV4l2Object * v4l2object)
{
GstV4l2Xv *v4l2xv = v4l2object->xv;
if (!v4l2object->xv)
return;
if (v4l2object->xwindow_id) {
gst_v4l2_xoverlay_set_window_handle (v4l2object, 0);
}
XCloseDisplay (v4l2xv->dpy);
g_mutex_free (v4l2xv->mutex);
if (v4l2xv->idle_id)
g_source_remove (v4l2xv->idle_id);
if (v4l2xv->event_id)
g_source_remove (v4l2xv->event_id);
g_free (v4l2xv);
v4l2object->xv = NULL;
}
static void
gst_v4l2_xoverlay_open (GstV4l2Object * v4l2object)
{
struct stat s;
GstV4l2Xv *v4l2xv;
const gchar *name = g_getenv ("DISPLAY");
unsigned int ver, rel, req, ev, err, anum;
int i, id = 0, first_id = 0, min;
XvAdaptorInfo *ai;
Display *dpy;
/* we need a display, obviously */
if (!name || !(dpy = XOpenDisplay (name))) {
GST_WARNING_OBJECT (v4l2object->element,
"No $DISPLAY set or failed to open - no overlay");
return;
}
/* First let's check that XVideo extension is available */
if (!XQueryExtension (dpy, "XVideo", &i, &i, &i)) {
GST_WARNING_OBJECT (v4l2object->element,
"Xv extension not available - no overlay");
XCloseDisplay (dpy);
return;
}
/* find port that belongs to this device */
if (XvQueryExtension (dpy, &ver, &rel, &req, &ev, &err) != Success) {
GST_WARNING_OBJECT (v4l2object->element,
"Xv extension not supported - no overlay");
XCloseDisplay (dpy);
return;
}
if (XvQueryAdaptors (dpy, DefaultRootWindow (dpy), &anum, &ai) != Success) {
GST_WARNING_OBJECT (v4l2object->element, "Failed to query Xv adaptors");
XCloseDisplay (dpy);
return;
}
if (fstat (v4l2object->video_fd, &s) < 0) {
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND,
(_("Cannot identify device '%s'."), v4l2object->videodev),
GST_ERROR_SYSTEM);
XCloseDisplay (dpy);
return;
}
min = s.st_rdev & 0xff;
for (i = 0; i < anum; i++) {
GST_DEBUG_OBJECT (v4l2object->element, "found adapter: %s", ai[i].name);
if (!strcmp (ai[i].name, "video4linux2") ||
!strcmp (ai[i].name, "video4linux")) {
if (first_id == 0)
first_id = ai[i].base_id;
GST_DEBUG_OBJECT (v4l2object->element,
"first_id=%d, base_id=%lu, min=%d", first_id, ai[i].base_id, min);
/* hmm... */
if (first_id != 0 && ai[i].base_id == first_id + min)
id = ai[i].base_id;
}
}
XvFreeAdaptorInfo (ai);
if (id == 0) {
GST_WARNING_OBJECT (v4l2object->element,
"Did not find XvPortID for device - no overlay");
XCloseDisplay (dpy);
return;
}
v4l2xv = g_new0 (GstV4l2Xv, 1);
v4l2xv->dpy = dpy;
v4l2xv->port = id;
v4l2xv->mutex = g_mutex_new ();
v4l2xv->idle_id = 0;
v4l2xv->event_id = 0;
v4l2object->xv = v4l2xv;
if (v4l2object->xwindow_id) {
gst_v4l2_xoverlay_set_window_handle (v4l2object, v4l2object->xwindow_id);
}
}
