static void
bus_sync_message (GstBus * bus, GstMessage * message,
GstDeviceMonitor * monitor)
{
GstMessageType type = GST_MESSAGE_TYPE (message);
if (type == GST_MESSAGE_DEVICE_ADDED || type == GST_MESSAGE_DEVICE_REMOVED) {
gboolean matches;
GstDevice *device;
GstDeviceProvider *provider;
if (type == GST_MESSAGE_DEVICE_ADDED)
gst_message_parse_device_added (message, &device);
else
gst_message_parse_device_removed (message, &device);
GST_OBJECT_LOCK (monitor);
provider =
GST_DEVICE_PROVIDER (gst_object_get_parent (GST_OBJECT (device)));
if (is_provider_hidden (monitor, monitor->priv->hidden, provider)) {
matches = FALSE;
} else if (monitor->priv->filters->len) {
guint i;
for (i = 0; i < monitor->priv->filters->len; i++) {
struct DeviceFilter *filter =
g_ptr_array_index (monitor->priv->filters, i);
GstCaps *caps;
caps = gst_device_get_caps (device);
matches = gst_caps_can_intersect (filter->caps, caps) &&
gst_device_has_classesv (device, filter->classesv);
gst_caps_unref (caps);
if (matches)
break;
}
} else {
matches = TRUE;
}
GST_OBJECT_UNLOCK (monitor);
gst_object_unref (provider);
gst_object_unref (device);
if (matches)
gst_bus_post (monitor->priv->bus, gst_message_ref (message));
}
}
static void
uevent_cb (GUdevClient * client, const gchar * action, GUdevDevice * device,
GstV4l2DeviceProvider * self)
{
GstDeviceProvider *provider = GST_DEVICE_PROVIDER (self);
/* Not V4L2, ignoring */
if (g_udev_device_get_property_as_int (device, "ID_V4L_VERSION") != 2)
return;
if (!strcmp (action, "add")) {
GstDevice *gstdev = NULL;
gstdev = gst_v4l2_device_provider_device_from_udev (self, device);
if (gstdev)
gst_device_provider_device_add (provider, gstdev);
} else if (!strcmp (action, "remove")) {
GstV4l2Device *gstdev = NULL;
GList *item;
GST_OBJECT_LOCK (self);
for (item = provider->devices; item; item = item->next) {
gstdev = item->data;
if (!strcmp (gstdev->syspath, g_udev_device_get_sysfs_path (device))) {
gst_object_ref (gstdev);
break;
}
gstdev = NULL;
}
GST_OBJECT_UNLOCK (provider);
if (gstdev) {
gst_device_provider_device_remove (provider, GST_DEVICE (gstdev));
g_object_unref (gstdev);
}
} else {
GST_WARNING ("Unhandled action %s", action);
}
}
static gpointer
provider_thread (gpointer data)
{
GstV4l2DeviceProvider *provider = data;
GMainContext *context = NULL;
GMainLoop *loop = NULL;
GUdevClient *client;
GList *devices;
static const gchar *subsystems[] = { "video4linux", NULL };
GST_OBJECT_LOCK (provider);
if (provider->context)
context = g_main_context_ref (provider->context);
if (provider->loop)
loop = g_main_loop_ref (provider->loop);
if (context == NULL || loop == NULL) {
provider->started = TRUE;
g_cond_broadcast (&provider->started_cond);
GST_OBJECT_UNLOCK (provider);
return NULL;
}
GST_OBJECT_UNLOCK (provider);
g_main_context_push_thread_default (context);
client = g_udev_client_new (subsystems);
g_signal_connect (client, "uevent", G_CALLBACK (uevent_cb), provider);
devices = g_udev_client_query_by_subsystem (client, "video4linux");
while (devices) {
GUdevDevice *udev_device = devices->data;
GstDevice *gstdev;
devices = g_list_remove (devices, udev_device);
if (g_udev_device_get_property_as_int (udev_device, "ID_V4L_VERSION") == 2) {
gstdev =
gst_v4l2_device_provider_device_from_udev (provider, udev_device);
if (gstdev)
gst_device_provider_device_add (GST_DEVICE_PROVIDER (provider), gstdev);
}
g_object_unref (udev_device);
}
GST_OBJECT_LOCK (provider);
provider->started = TRUE;
g_cond_broadcast (&provider->started_cond);
GST_OBJECT_UNLOCK (provider);
g_main_loop_run (loop);
g_main_loop_unref (loop);
g_object_unref (client);
g_main_context_unref (context);
gst_object_unref (provider);
return NULL;
}
