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ext/ffmpeg/gstffmpegdec.c: Fix some segfaults while seeking. When i have unreffed the buffer in _release_buffer i sho...

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Original commit message from CVS:
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_release_buffer),
(gst_ffmpegdec_frame):
Fix some segfaults while seeking. When i have unreffed
the buffer in _release_buffer i should also set picture->opaque to
NULL otherwise sometimes it can be unreffed another time in
_frame causing an invalid read/write.
This commit is contained in:
Luca Ognibene 2005-11-16 21:48:06 +00:00
parent 3ebe19c676
commit e6ada24827
3 changed files with 23 additions and 7 deletions
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9
ChangeLog
View file

@ -1,3 +1,12 @@
2005-11-16 Luca Ognibene <luogni@tin.it>
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_release_buffer),
(gst_ffmpegdec_frame):
Fix some segfaults while seeking. When i have unreffed
the buffer in _release_buffer i should also set picture->opaque to
NULL otherwise sometimes it can be unreffed another time in
_frame causing an invalid read/write.
2005-11-14 Andy Wingo <wingo@pobox.com>
* configure.ac (GST_PLUGIN_LDFLAGS): -no-undefined for better

2
common

@ -1 +1 @@
Subproject commit 657b549dfb640a76f3d7ab7676e453c801a83dca
Subproject commit ea1409191cc1e71273b2dbdd94e7ab5fc5a60a51

19
ext/ffmpeg/gstffmpegdec.c
View file

@ -603,16 +603,19 @@ static void
gst_ffmpegdec_release_buffer (AVCodecContext * context, AVFrame * picture)
{
gint i;
GstBuffer *buf = GST_BUFFER (picture->opaque);
GstBuffer *buf;
GstFFMpegDec *ffmpegdec = (GstFFMpegDec *) context->opaque;
g_return_if_fail (buf != NULL);
g_return_if_fail (picture->type == FF_BUFFER_TYPE_USER);
buf = GST_BUFFER (picture->opaque);
if (buf == ffmpegdec->last_buffer)
ffmpegdec->last_buffer = NULL;
gst_buffer_unref (buf);
picture->opaque = NULL;
/* zero out the reference in ffmpeg */
for (i = 0; i < 4; i++) {
@ -769,9 +772,13 @@ gst_ffmpegdec_frame (GstFFMpegDec * ffmpegdec,
"Dropping frame for synctime %" GST_TIME_FORMAT
", expected(next_ts) %" GST_TIME_FORMAT,
GST_TIME_ARGS (ffmpegdec->synctime),
GST_TIME_ARGS (ffmpegdec->next_ts));
if (ffmpegdec->last_buffer)
gst_buffer_unref (ffmpegdec->last_buffer);
GST_TIME_ARGS (ffmpegdec->next_ts));
if (ffmpegdec->picture->opaque != NULL) {
outbuf = (GstBuffer *) ffmpegdec->picture->opaque;
gst_buffer_unref (outbuf);
}
have_data = 0;
/* don´t break here! Timestamps are updated below */
}