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cea608overlay: fix rendering when roll up base row is at the top

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We were ensuring that the base row was one too large for the number of roll up
rows and causing the first row to unable to be written to.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1985>
This commit is contained in:
Matthew Waters 2024-12-13 17:02:01 +11:00 committed by GStreamer Marge Bot
parent 7d4ddc7eb9
commit b367b38633
1 changed files with 1 additions and 1 deletions
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2
video/closedcaption/src/cea608utils.rs
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@ -328,7 +328,7 @@ impl Cea608Frame {
self.row = preamble.row() as usize;
}
Mode::RollUp2 | Mode::RollUp3 | Mode::RollUp4 => {
let base_row = preamble.row().max(mode.rollup_rows().unwrap_or(0));
let base_row = preamble.row().max(mode.rollup_rows().unwrap_or(0) - 1);
if self.base_row != base_row {
gst::debug!(
CAT,