From 8c268ecd06bfb976f66cc7869f129544aaf79369 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Fri, 6 Jul 2018 10:36:00 +0200
Subject: [PATCH] Gracefully return None in Caps::get_structure() if the index
 is too high

---
 gstreamer/src/caps.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gstreamer/src/caps.rs b/gstreamer/src/caps.rs
index 5b3547219..e4b204e1e 100644
--- a/gstreamer/src/caps.rs
+++ b/gstreamer/src/caps.rs
@@ -128,6 +128,10 @@ impl CapsRef {
     }
 
     pub fn get_structure(&self, idx: u32) -> Option<&StructureRef> {
+        if idx >= self.get_size() {
+            return None;
+        }
+
         unsafe {
             let structure = ffi::gst_caps_get_structure(self.as_ptr(), idx);
             if structure.is_null() {
@@ -141,6 +145,10 @@ impl CapsRef {
     }
 
     pub fn get_mut_structure(&mut self, idx: u32) -> Option<&mut StructureRef> {
+        if idx >= self.get_size() {
+            return None;
+        }
+
         unsafe {
             let structure = ffi::gst_caps_get_structure(self.as_ptr(), idx);
             if structure.is_null() {