[FFmpeg-cvslog] avcodec/mpeg12dec: Use proper logcontext

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Tue Mar  4 23:06:38 2025 +0100| [883120aaf04a42252ff95d0f48934006feb8a94c] | committer: Andreas Rheinhardt

avcodec/mpeg12dec: Use proper logcontext

When used with the "mpegvideo" or "mpeg1video" decoder (which do not
have a private class) this would lead to the log callback receiving
a non-NULL object with a NULL AVClass pointer. The default log callback
handles this gracefully, yet it is probably an API violation.

Reviewed-by: Ramiro Polla <ramiro.polla at gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=883120aaf04a42252ff95d0f48934006feb8a94c
---

 libavcodec/mpeg12dec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index 843640edbf..14c028379e 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -1655,11 +1655,11 @@ static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
     }
 eos: // end of slice
     if (get_bits_left(&s->gb) < 0) {
-        av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
+        av_log(s->avctx, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
         return AVERROR_INVALIDDATA;
     }
     *buf += (get_bits_count(&s->gb) - 1) / 8;
-    ff_dlog(s, "Slice start:%d %d  end:%d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
+    ff_dlog(s->avctx, "Slice start:%d %d  end:%d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
     return 0;
 }