From 2c3514a5a104bf7c7385516afbfe810146db4391 Mon Sep 17 00:00:00 2001
From: Arun Raghavan <arun@asymptotic.io>
Date: Wed, 11 May 2022 09:58:28 -0400
Subject: [PATCH] dav1ddec: Deal with the possibilty of 0/1 fps in latency math

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/698>
---
 video/dav1d/src/dav1ddec/imp.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/video/dav1d/src/dav1ddec/imp.rs b/video/dav1d/src/dav1ddec/imp.rs
index c26f201f..8b792a18 100644
--- a/video/dav1d/src/dav1ddec/imp.rs
+++ b/video/dav1d/src/dav1ddec/imp.rs
@@ -641,10 +641,15 @@ impl VideoDecoderImpl for Dav1dDec {
                                 .into()
                             };
 
+                            let fps_n = match info.fps().numer() {
+                                0 => 30, // Pretend we're at 30fps if we don't know latency,
+                                n => n,
+                            };
+
                             let latency = frame_latency
                                 * (info.fps().denom() as u64)
                                 * gst::ClockTime::SECOND
-                                / (info.fps().numer() as u64);
+                                / (fps_n as u64);
 
                             gst::debug!(CAT, obj: element, "Reporting latency of {}", latency);