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camerabin: proxy video source photography interface property notify signals

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If photography interface properties change in video source, notify the
application by emitting notify for respective camerabin properties.
This commit is contained in:
Lasse Laukkanen 2009-10-14 14:01:34 +03:00 committed by Thiago Santos
parent eb3fb87710
commit 2c4417dabc
1 changed files with 63 additions and 0 deletions
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63
gst/camerabin/gstcamerabin.c
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@ -298,6 +298,10 @@ gst_camerabin_update_aspect_filter (GstCameraBin * camera, GstCaps * new_caps);
static void gst_camerabin_finish_image_capture (GstCameraBin * camera);
static void gst_camerabin_adapt_image_capture (GstCameraBin * camera,
GstCaps * new_caps);
static void gst_camerabin_proxy_notify_cb (GObject * video_source,
GParamSpec * pspec, gpointer user_data);
static void gst_camerabin_monitor_video_source_properties (GstCameraBin *
camera);
static void gst_camerabin_configure_format (GstCameraBin * camera,
GstCaps * caps);
static gboolean
@ -486,6 +490,8 @@ camerabin_setup_src_elements (GstCameraBin * camera)
0));
}
gst_camerabin_monitor_video_source_properties (camera);
/* Update photography interface settings */
if (GST_IS_ELEMENT (camera->src_vid_src) &&
gst_element_implements_interface (camera->src_vid_src,
@ -2341,6 +2347,61 @@ gst_camerabin_adapt_image_capture (GstCameraBin * camera, GstCaps * in_caps)
}
}
static void
gst_camerabin_proxy_notify_cb (GObject * video_source, GParamSpec * pspec,
gpointer user_data)
{
const gchar *name = g_param_spec_get_name (pspec);
GstElement *camerabin = GST_ELEMENT (user_data);
GST_DEBUG_OBJECT (camerabin, "proxying %s notify from %" GST_PTR_FORMAT, name,
GST_ELEMENT (video_source));
g_object_notify (G_OBJECT (camerabin), name);
}
/*
* gst_camerabin_monitor_video_source_properties:
* @camera: camerabin object
*
* Monitor notify signals from video source photography interface
* properties, and proxy the notifications to application.
*
*/
static void
gst_camerabin_monitor_video_source_properties (GstCameraBin * camera)
{
GParamSpec **properties;
gchar *notify_string;
gpointer photo_iface;
guint i, n_properties = 0;
GST_DEBUG_OBJECT (camera, "checking for photography interface support");
if (GST_IS_ELEMENT (camera->src_vid_src) &&
gst_element_implements_interface (camera->src_vid_src,
GST_TYPE_PHOTOGRAPHY)) {
GST_DEBUG_OBJECT (camera,
"start monitoring property changes in %" GST_PTR_FORMAT,
camera->src_vid_src);
photo_iface = g_type_default_interface_ref (GST_TYPE_PHOTOGRAPHY);
properties =
g_object_interface_list_properties (photo_iface, &n_properties);
if (properties) {
for (i = 0; i < n_properties; i++) {
notify_string =
g_strconcat ("notify::", g_param_spec_get_name (properties[i]),
NULL);
GST_DEBUG_OBJECT (camera, "connecting to %" GST_PTR_FORMAT " - %s",
camera->src_vid_src, notify_string);
g_signal_connect (G_OBJECT (camera->src_vid_src), notify_string,
(GCallback) gst_camerabin_proxy_notify_cb, camera);
g_free (notify_string);
}
}
g_type_default_interface_unref (photo_iface);
}
}
/*
* gst_camerabin_configure_format:
* @camera: camerabin object
@ -3249,6 +3310,8 @@ gst_camerabin_change_state (GstElement * element, GstStateChange transition)
g_cond_signal (camera->cond);
}
g_mutex_unlock (camera->capture_mutex);
g_signal_handlers_disconnect_by_func (camera->src_vid_src,
gst_camerabin_proxy_notify_cb, camera);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
camerabin_destroy_elements (camera);