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camerabin2: Handle null taglists for images

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Add NULL and check for them to the image capture taglist list, representing
that a capture has no application tags set.
This commit is contained in:
Thiago Santos 2011-11-09 11:45:27 -03:00
parent 9ab6406f23
commit 27e01e02a4
1 changed files with 32 additions and 24 deletions
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56
gst/camerabin2/gstcamerabin2.c
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@ -427,29 +427,28 @@ gst_camera_bin_start_capture (GstCameraBin2 * camerabin)
* notify from ready for capture going to FALSE
*/
taglist = gst_tag_setter_get_tag_list (GST_TAG_SETTER (camerabin));
if (taglist) {
GST_DEBUG_OBJECT (camerabin, "Have tags from application: %"
GST_PTR_FORMAT, taglist);
if (camerabin->mode == MODE_IMAGE) {
/* Store image tags in a list and push them later, this prevents
start_capture() from blocking in pad_push_event call */
g_mutex_lock (camerabin->image_tags_mutex);
camerabin->image_tags_list =
g_slist_append (camerabin->image_tags_list,
taglist ? gst_tag_list_copy (taglist) : NULL);
g_mutex_unlock (camerabin->image_tags_mutex);
} else if (taglist) {
GstPad *active_pad;
GST_DEBUG_OBJECT (camerabin, "Have tags from application: %"
GST_PTR_FORMAT, taglist);
active_pad = gst_element_get_static_pad (camerabin->src,
GST_BASE_CAMERA_SRC_VIDEO_PAD_NAME);
gst_pad_push_event (active_pad,
gst_event_new_tag (gst_tag_list_copy (taglist)));
if (camerabin->mode == MODE_IMAGE) {
/* Store image tags in a list and push them later, this prevents
start_capture() from blocking in pad_push_event call */
g_mutex_lock (camerabin->image_tags_mutex);
camerabin->image_tags_list =
g_slist_append (camerabin->image_tags_list,
gst_tag_list_copy (taglist));
g_mutex_unlock (camerabin->image_tags_mutex);
} else {
active_pad = gst_element_get_static_pad (camerabin->src,
GST_BASE_CAMERA_SRC_VIDEO_PAD_NAME);
gst_pad_push_event (active_pad,
gst_event_new_tag (gst_tag_list_copy (taglist)));
gst_object_unref (active_pad);
}
gst_object_unref (active_pad);
}
GST_DEBUG_OBJECT (camerabin, "Start-capture end");
}
@ -1284,9 +1283,11 @@ gst_camera_bin_image_src_buffer_probe (GstPad * pad, GstBuffer * buf,
g_mutex_unlock (camerabin->image_tags_mutex);
GST_DEBUG_OBJECT (camerabin, "Pushing tags from application: %"
GST_PTR_FORMAT, tags);
peer = gst_pad_get_peer (pad);
gst_pad_send_event (peer, gst_event_new_tag (tags));
gst_object_unref (peer);
if (tags) {
peer = gst_pad_get_peer (pad);
gst_pad_send_event (peer, gst_event_new_tag (tags));
gst_object_unref (peer);
}
} else {
g_mutex_unlock (camerabin->image_tags_mutex);
GST_DEBUG_OBJECT (camerabin, "No tags from application to send");
@ -1759,6 +1760,13 @@ fail:
return FALSE;
}
static void
_gst_tag_list_free_maybe (GstTagList * taglist)
{
if (taglist)
gst_tag_list_free (taglist);
}
static GstStateChangeReturn
gst_camera_bin_change_state (GstElement * element, GstStateChange trans)
{
@ -1805,8 +1813,8 @@ gst_camera_bin_change_state (GstElement * element, GstStateChange trans)
camera->image_location_list = NULL;
g_mutex_lock (camera->image_tags_mutex);
g_slist_foreach (camera->image_tags_list, (GFunc) gst_tag_list_free,
NULL);
g_slist_foreach (camera->image_tags_list,
(GFunc) _gst_tag_list_free_maybe, NULL);
g_slist_free (camera->image_tags_list);
camera->image_tags_list = NULL;
g_mutex_unlock (camera->image_tags_mutex);