fftools: Switch to const AVCodec * where possible

The obstacle to do so was in filter_codec_opts: It uses searches
the AVCodec for options via the AV_OPT_SEARCH_FAKE_OBJ method, which
requires using a void * that points to a pointer to a const AVClass.
When using const AVCodec *, one can not simply use a pointer that points
to the AVCodec's pointer to its AVClass, as said pointer is const, too.
This is fixed by using a temporary pointer to the AVClass.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fftools/ffplay.c b/fftools/ffplay.c
index ac0885b84e..471d4a2ac9 100644
--- a/fftools/ffplay.c
+++ b/fftools/ffplay.c
@@ -2573,7 +2573,7 @@ static int stream_component_open(VideoState *is, int stream_index)
 {
     AVFormatContext *ic = is->ic;
     AVCodecContext *avctx;
-    AVCodec *codec;
+    const AVCodec *codec;
     const char *forced_codec_name = NULL;
     AVDictionary *opts = NULL;
     AVDictionaryEntry *t = NULL;