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viewfinderbin: Improve elements creation

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Be more careful with cleanup of elements. Also add some logs and
improve docs a little.
This commit is contained in:
Thiago Santos 2010-12-02 01:33:19 -03:00
parent 19e52f35ee
commit 0685b8921e
1 changed files with 28 additions and 5 deletions
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33
gst/camerabin2/gstviewfinderbin.c
View file

@ -19,14 +19,14 @@
/**
* SECTION:element-gstviewfinderbin
*
* The gstviewfinderbin element does FIXME stuff.
* The gstviewfinderbin element is a displaying element for camerabin2.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v videotestsrc ! viewfinderbin
* ]|
* FIXME Describe what the pipeline does.
* Feeds the viewfinderbin with video test data.
* </refsect2>
*/
@ -36,6 +36,9 @@
#include "gstviewfinderbin.h"
GST_DEBUG_CATEGORY_STATIC (gst_viewfinder_bin_debug);
#define GST_CAT_DEFAULT gst_viewfinder_bin_debug
/* prototypes */
@ -97,10 +100,13 @@ gst_viewfinder_bin_init (GstViewfinderBin * viewfinderbin,
static gboolean
gst_viewfinder_bin_create_elements (GstViewfinderBin * vfbin)
{
GstElement *csp;
GstElement *videoscale;
GstElement *sink;
GstElement *csp = NULL;
GstElement *videoscale = NULL;
GstElement *sink = NULL;
GstPad *pad = NULL;
gboolean added = FALSE;
GST_DEBUG_OBJECT (vfbin, "Creating internal elements");
if (vfbin->elements_created)
return TRUE;
@ -118,8 +124,11 @@ gst_viewfinder_bin_create_elements (GstViewfinderBin * vfbin)
if (!sink)
goto error;
GST_DEBUG_OBJECT (vfbin, "Internal elements created, proceding to linking");
/* add and link */
gst_bin_add_many (GST_BIN_CAST (vfbin), csp, videoscale, sink, NULL);
added = TRUE;
if (!gst_element_link_many (csp, videoscale, sink, NULL))
goto error;
@ -129,11 +138,23 @@ gst_viewfinder_bin_create_elements (GstViewfinderBin * vfbin)
goto error;
vfbin->elements_created = TRUE;
GST_DEBUG_OBJECT (vfbin, "Elements succesfully created and linked");
return TRUE;
error:
GST_WARNING_OBJECT (vfbin, "Creating internal elements failed");
if (pad)
gst_object_unref (pad);
if (!added) {
if (csp)
gst_object_unref (csp);
if (videoscale)
gst_object_unref (videoscale);
if (sink)
gst_object_unref (sink);
} else {
gst_bin_remove_many (GST_BIN_CAST (vfbin), csp, videoscale, sink, NULL);
}
return FALSE;
}
@ -168,6 +189,8 @@ gst_viewfinder_bin_change_state (GstElement * element, GstStateChange trans)
gboolean
gst_viewfinder_bin_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_viewfinder_bin_debug, "viewfinderbin", 0,
"ViewFinderBin");
return gst_element_register (plugin, "viewfinderbin", GST_RANK_NONE,
gst_viewfinder_bin_get_type ());
}