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wrappercamerabinsrc: change video-source if the user requested

Browse source 
When going from null to ready, check if the user requested to
use a new source and replace the current one.

Fixes #681562
This commit is contained in:
Thiago Santos 2012-09-28 00:06:45 -03:00
parent c6fd3b070b
commit 8c8d1a0b6b
2 changed files with 88 additions and 33 deletions
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120
gst/camerabin2/gstwrappercamerabinsrc.c
View file

@ -431,6 +431,89 @@ gst_wrapper_camera_bin_src_src_event (GstPad * pad, GstObject * parent,
return ret;
}
/**
* check_and_replace_src
* @self: #GstWrapperCamerabinSrcCameraSrc object
*
* Checks if the current videosrc needs to be replaced
*/
static gboolean
check_and_replace_src (GstWrapperCameraBinSrc * self)
{
GstBin *cbin = GST_BIN_CAST (self);
GstBaseCameraSrc *bcamsrc = GST_BASE_CAMERA_SRC_CAST (self);
if (self->src_vid_src && self->src_vid_src == self->app_vid_src) {
GST_DEBUG_OBJECT (self, "No need to change current videosrc");
return TRUE;
}
if (self->src_vid_src) {
GST_DEBUG_OBJECT (self, "Removing old video source");
if (self->src_max_zoom_signal_id) {
g_signal_handler_disconnect (self->src_vid_src,
self->src_max_zoom_signal_id);
self->src_max_zoom_signal_id = 0;
}
if (self->src_event_probe_id) {
GstPad *pad;
pad = gst_element_get_static_pad (self->src_vid_src, "src");
gst_pad_remove_probe (pad, self->src_event_probe_id);
gst_object_unref (pad);
self->src_event_probe_id = 0;
}
gst_bin_remove (GST_BIN_CAST (self), self->src_vid_src);
self->src_vid_src = NULL;
}
GST_DEBUG_OBJECT (self, "Adding new video source");
/* Add application set or default video src element */
if (!(self->src_vid_src = gst_camerabin_setup_default_element (cbin,
self->app_vid_src, "autovideosrc", DEFAULT_VIDEOSRC,
"camerasrc-real-src"))) {
self->src_vid_src = NULL;
return FALSE;
} else {
GstElement *videoconvert;
if (!gst_bin_add (cbin, self->src_vid_src)) {
return FALSE;
}
/* check if we already have the next element to link to */
videoconvert = gst_bin_get_by_name (cbin, "src-videoconvert");
if (videoconvert) {
if (!gst_element_link_pads (self->src_vid_src, "src", videoconvert,
"sink")) {
return FALSE;
}
}
}
/* we lost the reference */
self->app_vid_src = NULL;
/* we listen for changes to max-zoom in the video src so that
* we can proxy them to the basecamerasrc property */
if (g_object_class_find_property (G_OBJECT_GET_CLASS (bcamsrc), "max-zoom")) {
self->src_max_zoom_signal_id =
g_signal_connect (G_OBJECT (self->src_vid_src), "notify::max-zoom",
(GCallback) gst_wrapper_camera_bin_src_max_zoom_cb, bcamsrc);
}
/* add a buffer probe to the src elemento to drop EOS from READY->NULL */
{
GstPad *pad;
pad = gst_element_get_static_pad (self->src_vid_src, "src");
self->src_event_probe_id =
gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
gst_wrapper_camera_src_src_event_probe, gst_object_ref (self),
gst_object_unref);
gst_object_unref (pad);
}
return TRUE;
}
/**
* gst_wrapper_camera_bin_src_construct_pipeline:
* @bcamsrc: camerasrc object
@ -459,43 +542,14 @@ gst_wrapper_camera_bin_src_construct_pipeline (GstBaseCameraSrc * bcamsrc)
GstPad *tee_capture_pad;
GstPad *src_caps_src_pad;
/* checks and adds a new video src if needed */
if (!check_and_replace_src (self))
goto done;
if (!self->elements_created) {
GST_DEBUG_OBJECT (self, "constructing pipeline");
/* Add application set or default video src element */
if (!(self->src_vid_src = gst_camerabin_setup_default_element (cbin,
self->app_vid_src, "autovideosrc", DEFAULT_VIDEOSRC,
"camerasrc-real-src"))) {
self->src_vid_src = NULL;
goto done;
} else {
if (!gst_camerabin_add_element (cbin, self->src_vid_src)) {
goto done;
}
}
/* we lost the reference */
self->app_vid_src = NULL;
/* we listen for changes to max-zoom in the video src so that
* we can proxy them to the basecamerasrc property */
if (g_object_class_find_property (G_OBJECT_GET_CLASS (bcamsrc), "max-zoom")) {
g_signal_connect (G_OBJECT (self->src_vid_src), "notify::max-zoom",
(GCallback) gst_wrapper_camera_bin_src_max_zoom_cb, bcamsrc);
}
/* add a buffer probe to the src elemento to drop EOS from READY->NULL */
{
GstPad *pad;
pad = gst_element_get_static_pad (self->src_vid_src, "src");
self->src_event_probe_id =
gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
gst_wrapper_camera_src_src_event_probe, gst_object_ref (self),
gst_object_unref);
gst_object_unref (pad);
}
if (!gst_camerabin_create_and_add_element (cbin, "videoconvert",
"src-videoconvert"))
goto done;

1
gst/camerabin2/gstwrappercamerabinsrc.h
View file

@ -84,6 +84,7 @@ struct _GstWrapperCameraBinSrc
gboolean elements_created;
gulong src_event_probe_id;
gulong src_max_zoom_signal_id;
GstPad *outsel_imgpad;
GstPad *outsel_vidpad;