From 45800d763635b4183b4e1643411ed973103d5cf7 Mon Sep 17 00:00:00 2001
From: Matthew Waters <matthew@centricular.com>
Date: Wed, 29 May 2024 19:55:05 +1000
Subject: [PATCH] tttocea708: ensure periodic sync points in roll up mode

Otherwise, without the relevant DefineWindow, then a receiver cannot
begin to display the captions from the middle of a stream.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1591>
---
 video/closedcaption/src/tttocea708/translate.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/video/closedcaption/src/tttocea708/translate.rs b/video/closedcaption/src/tttocea708/translate.rs
index 1a5e4734..60fcfee2 100644
--- a/video/closedcaption/src/tttocea708/translate.rs
+++ b/video/closedcaption/src/tttocea708/translate.rs
@@ -479,7 +479,8 @@ impl TextToCea708 {
                             || self.pen_location.column > 31
                         {
                             self.pen_location.column = self.origin_column as u8;
-                            self.service_writer.push_codes(&[Code::CR]);
+
+                            self.open_line(chunk, Some(true));
                         }
                     } else if self.pen_location.column > 31 {
                         if chars.peek().is_some() {