avfilter/formats: Remove pointless checks

ff_formats_ref() takes a pointer to an AVFilterFormats and a pointer to
a pointer to an AVFilterFormats as arguments and adds the latter as an
owner to the list pointed to by the former; the latter is hereby always
the address of a list contained in an AVFilterFormatsConfig and can
therefore not be NULL. So remove the check for whether it is NULL; also
do the same for ff_channel_layouts_ref().

Also do the same for the unref functions where argument is never NULL
because it is always the address of an existing lvalue.

Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

diff --git a/libavfilter/formats.c b/libavfilter/formats.c
index c54aff688f306e9891ec5503d0e1264408effc39..713173e7070a506ad4d8bc9d43ce36ae4c725c50 100644 (file)
--- a/libavfilter/formats.c
+++ b/libavfilter/formats.c
@@ -446,7 +446,7 @@ AVFilterChannelLayouts *ff_all_channel_counts(void)
 #define FORMATS_REF(f, ref, unref_fn)                                           \
     void *tmp;                                                                  \
                                                                                 \
-    if (!f || !ref)                                                             \
+    if (!f)                                                                     \
         return AVERROR(ENOMEM);                                                 \
                                                                                 \
     tmp = av_realloc_array(f->refs, sizeof(*f->refs), f->refcount + 1);         \
@@ -483,7 +483,7 @@ do {                                        \
 do {                                                               \
     int idx = -1;                                                  \
                                                                    \
-    if (!ref || !*ref)                                             \
+    if (!*ref)                                                     \
         return;                                                    \
                                                                    \
     FIND_REF_INDEX(ref, idx);                                      \