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v4l2transform: Implement open/close

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This commit is contained in:
Nicolas Dufresne 2014-04-15 17:31:42 -04:00
parent 23e273acb2
commit 783417ee9f
1 changed files with 37 additions and 13 deletions
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50
sys/v4l2/gstv4l2transform.c
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@ -124,10 +124,8 @@ gst_v4l2_transform_get_property (GObject * object,
}
static gboolean
gst_v4l2_transform_start (GstBaseTransform * trans)
gst_v4l2_transform_open (GstV4l2Transform * self)
{
GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans);
GST_DEBUG_OBJECT (self, "Opening");
if (!gst_v4l2_object_open (self->v4l2output))
@ -176,19 +174,27 @@ failure:
return FALSE;
}
static void
gst_v4l2_transform_close (GstV4l2Transform * self)
{
GST_DEBUG_OBJECT (self, "Closing");
gst_v4l2_object_close (self->v4l2output);
gst_v4l2_object_close (self->v4l2capture);
gst_caps_replace (&self->probed_srccaps, NULL);
gst_caps_replace (&self->probed_srccaps, NULL);
}
static gboolean
gst_v4l2_transform_stop (GstBaseTransform * trans)
{
GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans);
GST_DEBUG_OBJECT (self, "Closing");
GST_DEBUG_OBJECT (self, "Stop");
gst_v4l2_object_stop (self->v4l2output);
gst_v4l2_object_stop (self->v4l2capture);
gst_v4l2_object_close (self->v4l2output);
gst_v4l2_object_close (self->v4l2capture);
gst_caps_replace (&self->probed_srccaps, NULL);
gst_caps_replace (&self->probed_srccaps, NULL);
gst_caps_replace (&self->incaps, NULL);
gst_caps_replace (&self->outcaps, NULL);
@ -537,13 +543,32 @@ gst_v4l2_transform_change_state (GstElement * element,
GstStateChange transition)
{
GstV4l2Transform *self = GST_V4L2_TRANSFORM (element);
GstStateChangeReturn ret;
if (transition == GST_STATE_CHANGE_PAUSED_TO_READY) {
gst_v4l2_object_unlock (self->v4l2output);
gst_v4l2_object_unlock (self->v4l2capture);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_v4l2_transform_open (self))
return GST_STATE_CHANGE_FAILURE;
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_v4l2_object_unlock (self->v4l2output);
gst_v4l2_object_unlock (self->v4l2capture);
break;
default:
break;
}
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
gst_v4l2_transform_close (self);
break;
default:
break;
}
return ret;
}
static void
@ -619,7 +644,6 @@ gst_v4l2_transform_class_init (GstV4l2TransformClass * klass)
gobject_class->get_property =
GST_DEBUG_FUNCPTR (gst_v4l2_transform_get_property);
base_transform_class->start = GST_DEBUG_FUNCPTR (gst_v4l2_transform_start);
base_transform_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_transform_stop);
base_transform_class->set_caps =
GST_DEBUG_FUNCPTR (gst_v4l2_transform_set_caps);