From 8bb0a7eecc0bc659be6379df45b47b1702942493 Mon Sep 17 00:00:00 2001
From: Edward Hervey <bilboed@bilboed.com>
Date: Thu, 28 Nov 2024 16:52:07 +0100
Subject: [PATCH] tttocea708: Fix off-by-one issue

last_frame_no is used to eventually calculate the outgoing pts. We want to
increment it *after* having created the content

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1947>
---
 video/closedcaption/src/tttocea708/translate.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/video/closedcaption/src/tttocea708/translate.rs b/video/closedcaption/src/tttocea708/translate.rs
index 43b98cb7..2ee71ff4 100644
--- a/video/closedcaption/src/tttocea708/translate.rs
+++ b/video/closedcaption/src/tttocea708/translate.rs
@@ -260,8 +260,6 @@ impl TextToCea708 {
     fn cc_data(&mut self) {
         self.check_erase_display();
 
-        self.last_frame_no += 1;
-
         let seq_no = self.sequence_no;
         self.sequence_no = (self.sequence_no + 1) & 0x3;
 
@@ -300,6 +298,8 @@ impl TextToCea708 {
             packet: cc_data[2..].to_vec(),
             frame_no: self.last_frame_no,
         });
+
+        self.last_frame_no += 1;
     }
 
     fn pad(&mut self, frame_no: u64) {