[FFmpeg-cvslog] avcodec/avcodec: Actually honour the documentation of subtitle_header

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Sun Apr 18 05:26:32 2021 +0200| [a1ed984e049c90122e80bd60c2028f9bb22cc31c] | committer: Andreas Rheinhardt

avcodec/avcodec: Actually honour the documentation of subtitle_header

It is only supposed to be freed by libavcodec for decoders, yet
avcodec_open2() always frees it on failure.
Furthermore, avcodec_close() doesn't free it for decoders.
Both of this has been changed.

Reviewed-by: James Almer <jamrial at gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a1ed984e049c90122e80bd60c2028f9bb22cc31c
---

 libavcodec/avcodec.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/libavcodec/avcodec.c b/libavcodec/avcodec.c
index 760a98d8ef..24f6922d4f 100644
--- a/libavcodec/avcodec.c
+++ b/libavcodec/avcodec.c
@@ -418,7 +418,8 @@ FF_ENABLE_DEPRECATION_WARNINGS
 
     av_dict_free(&tmp);
     av_freep(&avctx->priv_data);
-    av_freep(&avctx->subtitle_header);
+    if (av_codec_is_decoder(avctx->codec))
+        av_freep(&avctx->subtitle_header);
 
 #if FF_API_OLD_ENCDEC
     av_frame_free(&avci->to_free);
@@ -589,7 +590,9 @@ FF_DISABLE_DEPRECATION_WARNINGS
         av_frame_free(&avctx->coded_frame);
 FF_ENABLE_DEPRECATION_WARNINGS
 #endif
-    }
+    } else if (av_codec_is_decoder(avctx->codec))
+        av_freep(&avctx->subtitle_header);
+
     avctx->codec = NULL;
     avctx->active_thread_type = 0;