[FFmpeg-cvslog] avcodec/mpv_reconstruct_mb_template: Optimize dead code away

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Mon Oct 17 01:43:02 2022 +0200| [eb1ce6e3c73dbb59c3178d643eacc48bba824922] | committer: Andreas Rheinhardt

avcodec/mpv_reconstruct_mb_template: Optimize dead code away

None of the MPEG-1/2 codecs support frame threading,
so one can optimize the check for it away.

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=eb1ce6e3c73dbb59c3178d643eacc48bba824922
---

 libavcodec/mpv_reconstruct_mb_template.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/mpv_reconstruct_mb_template.c b/libavcodec/mpv_reconstruct_mb_template.c
index fd03d71985..5023fe58ae 100644
--- a/libavcodec/mpv_reconstruct_mb_template.c
+++ b/libavcodec/mpv_reconstruct_mb_template.c
@@ -121,7 +121,8 @@ void mpv_reconstruct_mb_internal(MpegEncContext *s, int16_t block[12][64],
             /* decoding or more than one mb_type (MC was already done otherwise) */
 
 #if !IS_ENCODER
-            if (HAVE_THREADS && s->avctx->active_thread_type & FF_THREAD_FRAME) {
+            if (HAVE_THREADS && is_mpeg12 != DEFINITELY_MPEG12 &&
+                s->avctx->active_thread_type & FF_THREAD_FRAME) {
                 if (s->mv_dir & MV_DIR_FORWARD) {
                     ff_thread_await_progress(&s->last_picture_ptr->tf,
                                              lowest_referenced_row(s, 0), 0);