NekoCWD/libcamera
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gst: Add child proxy support to libcamerasrc

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The child proxy interface is needed in order to allow setting
properties on pad using parse launch syntax.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
Nicolas Dufresne 2024-06-05 13:44:46 -04:00 • committed by Kieran Bingham
parent 74513c3987
commit a1549129d3
1 changed files with 43 additions and 2 deletions
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45
src/gstreamer/gstlibcamerasrc.cpp
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@ -157,7 +157,12 @@ enum {
PROP_AUTO_FOCUS_MODE,
};
static void gst_libcamera_src_child_proxy_init(gpointer g_iface,
gpointer iface_data);
G_DEFINE_TYPE_WITH_CODE(GstLibcameraSrc, gst_libcamera_src, GST_TYPE_ELEMENT,
G_IMPLEMENT_INTERFACE(GST_TYPE_CHILD_PROXY,
gst_libcamera_src_child_proxy_init)
GST_DEBUG_CATEGORY_INIT(source_debug, "libcamerasrc", 0,
"libcamera Source"))
@ -865,8 +870,10 @@ gst_libcamera_src_init(GstLibcameraSrc *self)
g_mutex_init(&state->lock_);
state->srcpads_.push_back(gst_pad_new_from_template(templ, "src"));
gst_element_add_pad(GST_ELEMENT(self), state->srcpads_.back());
GstPad *pad = gst_pad_new_from_template(templ, "src");
state->srcpads_.push_back(pad);
gst_element_add_pad(GST_ELEMENT(self), pad);
gst_child_proxy_child_added(GST_CHILD_PROXY(self), G_OBJECT(pad), GST_OBJECT_NAME(pad));
GST_OBJECT_FLAG_SET(self, GST_ELEMENT_FLAG_SOURCE);
@ -897,6 +904,8 @@ gst_libcamera_src_request_new_pad(GstElement *element, GstPadTemplate *templ,
return NULL;
}
gst_child_proxy_child_added(GST_CHILD_PROXY(self), G_OBJECT(pad), GST_OBJECT_NAME(pad));
return reinterpret_cast<GstPad *>(g_steal_pointer(&pad));
}
@ -905,6 +914,8 @@ gst_libcamera_src_release_pad(GstElement *element, GstPad *pad)
{
GstLibcameraSrc *self = GST_LIBCAMERA_SRC(element);
gst_child_proxy_child_removed(GST_CHILD_PROXY(self), G_OBJECT(pad), GST_OBJECT_NAME(pad));
GST_DEBUG_OBJECT(self, "Pad %" GST_PTR_FORMAT " being released", pad);
{
@ -965,3 +976,33 @@ gst_libcamera_src_class_init(GstLibcameraSrcClass *klass)
G_PARAM_WRITABLE);
g_object_class_install_property(object_class, PROP_AUTO_FOCUS_MODE, spec);
}
/* GstChildProxy implementation */
static GObject *
gst_libcamera_src_child_proxy_get_child_by_index(GstChildProxy *child_proxy,
guint index)
{
GLibLocker lock(GST_OBJECT(child_proxy));
GObject *obj = nullptr;
obj = reinterpret_cast<GObject *>(g_list_nth_data(GST_ELEMENT(child_proxy)->srcpads, index));
if (obj)
gst_object_ref(obj);
return obj;
}
static guint
gst_libcamera_src_child_proxy_get_children_count(GstChildProxy *child_proxy)
{
GLibLocker lock(GST_OBJECT(child_proxy));
return GST_ELEMENT_CAST(child_proxy)->numsrcpads;
}
static void
gst_libcamera_src_child_proxy_init(gpointer g_iface, [[maybe_unused]] gpointer iface_data)
{
GstChildProxyInterface *iface = reinterpret_cast<GstChildProxyInterface *>(g_iface);
iface->get_child_by_index = gst_libcamera_src_child_proxy_get_child_by_index;
iface->get_children_count = gst_libcamera_src_child_proxy_get_children_count;
}