[FFmpeg-cvslog] avformat/tedcaptionsdec: Fix memleak upon read header failure

[Andreas Rheinhardt]

ffmpeg | branch: release/4.2 | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Sun Jun 14 03:27:43 2020 +0200| [c86d0c0f7cc68f3f3c820dad623d1888e0378070] | committer: Andreas Rheinhardt

avformat/tedcaptionsdec: Fix memleak upon read header failure

The already parsed subtitles (contained in an FFDemuxSubtitlesQueue)
would leak if allocating the AVStream for the subtitles fails.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
(cherry picked from commit 337783b118d4cc265759c103b672dd5d5d3e7cb8)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c86d0c0f7cc68f3f3c820dad623d1888e0378070
---

 libavformat/tedcaptionsdec.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/libavformat/tedcaptionsdec.c b/libavformat/tedcaptionsdec.c
index 5572bfd931..3255819e77 100644
--- a/libavformat/tedcaptionsdec.c
+++ b/libavformat/tedcaptionsdec.c
@@ -275,10 +275,13 @@ static int parse_file(AVIOContext *pb, FFDemuxSubtitlesQueue *subs)
 static av_cold int tedcaptions_read_header(AVFormatContext *avf)
 {
     TEDCaptionsDemuxer *tc = avf->priv_data;
-    AVStream *st;
+    AVStream *st = avformat_new_stream(avf, NULL);
     int ret, i;
     AVPacket *last;
 
+    if (!st)
+        return AVERROR(ENOMEM);
+
     ret = parse_file(avf->pb, &tc->subs);
     if (ret < 0) {
         if (ret == AVERROR_INVALIDDATA)
@@ -292,9 +295,6 @@ static av_cold int tedcaptions_read_header(AVFormatContext *avf)
         tc->subs.subs[i].pts += tc->start_time;
 
     last = &tc->subs.subs[tc->subs.nb_subs - 1];
-    st = avformat_new_stream(avf, NULL);
-    if (!st)
-        return AVERROR(ENOMEM);
     st->codecpar->codec_type     = AVMEDIA_TYPE_SUBTITLE;
     st->codecpar->codec_id       = AV_CODEC_ID_TEXT;
     avpriv_set_pts_info(st, 64, 1, 1000);