avvidec: increase default alignment to 32 bytes

Change default alignment from 16 to 32 bytes, which fixes crashes
when decoding H.265 using AVX2-based decoder code paths and when
using ximagesink/glimagesink.

https://bugzilla.gnome.org/show_bug.cgi?id=754120

diff --git a/ext/libav/gstavviddec.c b/ext/libav/gstavviddec.c
index 3bf315e..c6c0d23 100644 (file)
--- a/ext/libav/gstavviddec.c
+++ b/ext/libav/gstavviddec.c
@@ -48,7 +48,7 @@ GST_DEBUG_CATEGORY_EXTERN (GST_CAT_PERFORMANCE);
 #define DEFAULT_MAX_THREADS            0
 #define DEFAULT_OUTPUT_CORRUPT         TRUE
 #define REQUIRED_POOL_MAX_BUFFERS       32
-#define DEFAULT_STRIDE_ALIGN            15
+#define DEFAULT_STRIDE_ALIGN            31
 #define DEFAULT_ALLOC_PARAM             { 0, DEFAULT_STRIDE_ALIGN, 0, 0, }
 
 enum