[libcamera-devel] [RFC PATCH v1 1/2] gstreamer: Factor out _pad_push_stream_start from _task_enter

[Vedant Paranjape]

This patch creates gst_libcamera_pad_push_stream_start function to
create stream id and to push the stream start. This is a non functional
change.

Signed-off-by: Vedant Paranjape <vedantparanjape160201 at gmail.com>
---
 src/gstreamer/gstlibcamerapad.cpp | 13 +++++++++++++
 src/gstreamer/gstlibcamerapad.h   |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/src/gstreamer/gstlibcamerapad.cpp b/src/gstreamer/gstlibcamerapad.cpp
index c00e81c8..c5bd14f0 100644
--- a/src/gstreamer/gstlibcamerapad.cpp
+++ b/src/gstreamer/gstlibcamerapad.cpp
@@ -155,6 +155,19 @@ gst_libcamera_pad_get_stream(GstPad *pad)
 	return nullptr;
 }
 
+void
+gst_libcamera_pad_push_stream_start(GstPad *pad, const guint group_id)
+{
+	g_autoptr(GstElement) element = gst_pad_get_parent_element(pad);
+	static gint stream_id_num = 0;
+
+	g_autofree gchar *stream_id_intermediate = g_strdup_printf("%i%i", group_id, g_atomic_int_add(&stream_id_num, 1));
+	g_autofree gchar *stream_id = gst_pad_create_stream_id(pad, element, stream_id_intermediate);
+	GstEvent *event = gst_event_new_stream_start(stream_id);
+	gst_event_set_group_id(event, group_id);
+	gst_pad_push_event(pad, event);
+}
+
 void
 gst_libcamera_pad_queue_buffer(GstPad *pad, GstBuffer *buffer)
 {
diff --git a/src/gstreamer/gstlibcamerapad.h b/src/gstreamer/gstlibcamerapad.h
index 779f2d13..7693374f 100644
--- a/src/gstreamer/gstlibcamerapad.h
+++ b/src/gstreamer/gstlibcamerapad.h
@@ -26,6 +26,8 @@ void gst_libcamera_pad_set_pool(GstPad *pad, GstLibcameraPool *pool);
 
 libcamera::Stream *gst_libcamera_pad_get_stream(GstPad *pad);
 
+void gst_libcamera_pad_push_stream_start(GstPad *pad, const guint group_id);
+
 void gst_libcamera_pad_queue_buffer(GstPad *pad, GstBuffer *buffer);
 
 GstFlowReturn gst_libcamera_pad_push_pending(GstPad *pad);
-- 
2.25.1