camerabin2: Implement previewing

Implement previewing functionality using 2 properties. A boolean
(post-previews) that indicates if previews should be posted, and a
GstCaps (preview-caps) to provide the desired preview caps.

wrappercamerabinsrc implements previewing by supplying the captured
image to a pipeline to adapt it to the required caps before posting.

1 files changed, 6 insertions, 0 deletions

diff --git a/gst/camerabin2/gstwrappercamerabinsrc.h b/gst/camerabin2/gstwrappercamerabinsrc.h
index 2813e8b4b..c74be279c 100644
--- a/gst/camerabin2/gstwrappercamerabinsrc.h
+++ b/gst/camerabin2/gstwrappercamerabinsrc.h
@@ -25,6 +25,7 @@
 
 #include <gst/gst.h>
 #include <gst/basecamerabinsrc/gstbasecamerasrc.h>
+#include "camerabingeneral.h"
 
 G_BEGIN_DECLS
 #define GST_TYPE_WRAPPER_CAMERA_BIN_SRC \
@@ -107,6 +108,11 @@ struct _GstWrapperCameraBinSrc
   GstCaps *image_capture_caps;
   gboolean image_renegotiate;
   gboolean video_renegotiate;
+
+  /* Preview convert pipeline */
+  GstCameraBinPreviewPipelineData *preview_pipeline;
+  gboolean post_previews;
+  GstCaps *preview_caps;
 };