From 4b5a2655714dcc17381d1a2b48601dbaf986e252 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Tue, 2 Apr 2024 16:53:26 +0300
Subject: [PATCH] pbutils: descriptions: Don't warn on MPEG-1 audio caps
 without layer field

While this is not ideal and won't give too accurate codec descriptions,
it is what tsdemux produces.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6511>
---
 .../gst-libs/gst/pbutils/descriptions.c       | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/subprojects/gst-plugins-base/gst-libs/gst/pbutils/descriptions.c b/subprojects/gst-plugins-base/gst-libs/gst/pbutils/descriptions.c
index a82f6c9e4e..33253d3db0 100644
--- a/subprojects/gst-plugins-base/gst-libs/gst/pbutils/descriptions.c
+++ b/subprojects/gst-plugins-base/gst-libs/gst/pbutils/descriptions.c
@@ -742,16 +742,17 @@ format_info_get_desc (const FormatInfo * info, const GstCaps * caps)
 
     switch (ver) {
       case 1:
-        gst_structure_get_int (s, "layer", &layer);
-        switch (layer) {
-          case 1:
-          case 2:
-          case 3:
-            return g_strdup_printf ("MPEG-1 Layer %d (MP%d)", layer, layer);
-          default:
-            break;
+        if (gst_structure_get_int (s, "layer", &layer)) {
+          switch (layer) {
+            case 1:
+            case 2:
+            case 3:
+              return g_strdup_printf ("MPEG-1 Layer %d (MP%d)", layer, layer);
+            default:
+              break;
+          }
+          GST_WARNING ("Unexpected MPEG-1 layer in %" GST_PTR_FORMAT, caps);
         }
-        GST_WARNING ("Unexpected MPEG-1 layer in %" GST_PTR_FORMAT, caps);
         return g_strdup ("MPEG-1 Audio");
       case 2:
         return g_strdup ("MPEG-2 AAC");