[FFmpeg-cvslog] avcodec/mpeg4videodec: Mark impossible switch case as unreachable

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Sun Oct  3 14:35:31 2021 +0200| [7a27357636ffc8e227b9c6f2bdade973ec4c3829] | committer: Andreas Rheinhardt

avcodec/mpeg4videodec: Mark impossible switch case as unreachable

Alternative to 8fc649b931a3cbc3a2dd9b50b75a9261a2fb4b49.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7a27357636ffc8e227b9c6f2bdade973ec4c3829
---

 libavcodec/mpeg4videodec.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c
index d5979096ae..b6bb21174e 100644
--- a/libavcodec/mpeg4videodec.c
+++ b/libavcodec/mpeg4videodec.c
@@ -24,6 +24,7 @@
 
 #include "config_components.h"
 
+#include "libavutil/avassert.h"
 #include "libavutil/internal.h"
 #include "libavutil/opt.h"
 #include "libavutil/thread.h"
@@ -605,7 +606,8 @@ static int mpeg4_decode_sprite_trajectory(Mpeg4DecContext *ctx, GetBitContext *g
         ctx->sprite_shift[1]  = alpha + beta + rho - min_ab + 2;
         break;
     default:
-        av_assert0(0);
+        av_unreachable("num_sprite_warping_points outside of 0..3 results in an error"
+                       "in which num_sprite_warping_points is reset to zero");
     }
     /* try to simplify the situation */
     if (sprite_delta[0][0] == a << ctx->sprite_shift[0] &&