From c068f662b133c99a9f9ad66acdc12e267be12608 Mon Sep 17 00:00:00 2001
From: r4v3n6101 <raven6107@gmail.com>
Date: Fri, 8 Aug 2025 13:20:59 +0300
Subject: [PATCH] rtmp4gdepay2: fix condition while creating parser

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/2489>
---
 net/rtp/src/mp4g/mode.rs | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/net/rtp/src/mp4g/mode.rs b/net/rtp/src/mp4g/mode.rs
index 663518d20..c7aa9d64b 100644
--- a/net/rtp/src/mp4g/mode.rs
+++ b/net/rtp/src/mp4g/mode.rs
@@ -9,8 +9,8 @@ pub enum ModeError {
     #[error("sizelength & constantsize can't be both defined")]
     BothAuSizeLenAndConstantSize,
 
-    #[error("Neither sizelength nor constantsize are defined, need at least one of them")]
-    NeitherAuSizeLenNorConstantSize,
+    #[error("no AU length parameters defined: need sizelength, constantsize, or constantduration")]
+    MissingAuLengthParameters,
 
     #[error("indexlength > 0 but indexdeltalength not defined")]
     MandatoryIndexDeltaLength,
@@ -83,13 +83,14 @@ impl ModeConfig {
 
         let size_len = Self::parse_int::<u8>(s, "sizelength")?;
         let constant_size = Self::parse_int::<u32>(s, "constantsize")?;
+        let constant_duration = Self::parse_int::<u32>(s, "constantduration")?;
 
         if size_len != 0 && constant_size != 0 {
             Err(BothAuSizeLenAndConstantSize)?;
         }
 
-        if size_len == 0 && constant_size == 0 {
-            Err(NeitherAuSizeLenNorConstantSize)?;
+        if size_len == 0 && constant_size == 0 && constant_duration == 0 {
+            Err(MissingAuLengthParameters)?;
         }
 
         // § 3.2.1
@@ -116,7 +117,7 @@ impl ModeConfig {
             stream_state_indication: Self::parse_int::<u8>(s, "streamstateindication")?,
             auxiliary_data_size_len: Self::parse_int::<u8>(s, "auxiliarydatasizelength")?,
             constant_size,
-            constant_duration: Self::parse_int::<u32>(s, "constantduration")?,
+            constant_duration,
             max_displacement: Self::parse_int::<u32>(s, "maxdisplacement")?,
         })
     }
@@ -161,8 +162,8 @@ impl ModeConfig {
             Err(BothAuSizeLenAndConstantSize)?;
         }
 
-        if self.size_len == 0 && self.constant_size == 0 {
-            Err(NeitherAuSizeLenNorConstantSize)?;
+        if self.size_len == 0 && self.constant_size == 0 && self.constant_duration == 0 {
+            Err(MissingAuLengthParameters)?;
         }
 
         if self.index_len > 0 && self.index_delta_len == 0 {