From 2599acc681ed98b594d3c39a485a5fc25bf50310 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Mon, 9 Mar 2020 13:02:20 +0200
Subject: [PATCH] gstreamer/caps: Assert on ANY caps in fixate() and work
 around bug in handling EMPTY caps

See https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/388
---
 gstreamer/src/caps.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/gstreamer/src/caps.rs b/gstreamer/src/caps.rs
index 4e800dd38..3343c9d2d 100644
--- a/gstreamer/src/caps.rs
+++ b/gstreamer/src/caps.rs
@@ -72,7 +72,16 @@ impl Caps {
 
     pub fn fixate(caps: Self) -> Self {
         skip_assert_initialized!();
-        unsafe { from_glib_full(gst_sys::gst_caps_fixate(caps.into_ptr())) }
+        unsafe {
+            // See https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/388
+            assert!(!caps.is_any());
+            let ptr = if caps.is_empty() {
+                gst_sys::gst_caps_new_empty()
+            } else {
+                gst_sys::gst_caps_fixate(caps.into_ptr())
+            };
+            from_glib_full(ptr)
+        }
     }
 
     pub fn merge(caps: Self, other: Self) -> Self {