Get zbar working again

src/zbar_pipeline.h

@@ -2,7 +2,7 @@
 
 #include "camera_config.h"
 
-typedef struct _cairo_surface cairo_surface_t;
+typedef struct _MPZBarImage MPZBarImage;
 
 typedef struct {
 	int bounds_x[4];
@@ -19,4 +19,13 @@ typedef struct {
 void mp_zbar_pipeline_start();
 void mp_zbar_pipeline_stop();
 
-void mp_zbar_pipeline_process_image(cairo_surface_t *surface);
+void mp_zbar_pipeline_process_image(MPZBarImage *image);
+
+MPZBarImage *mp_zbar_image_new(uint8_t *data,
+			       MPPixelFormat pixel_format,
+			       int width,
+			       int height,
+			       int rotation,
+			       bool mirrored);
+MPZBarImage *mp_zbar_image_ref(MPZBarImage *image);
+void mp_zbar_image_unref(MPZBarImage *image);