[FFmpeg-cvslog] audio_frame_queue: fix null ptr dereference

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Tue May 15 02:15:23 2012 +0200| [3938a0eeae24a335b181d753c464cf5bab33ff01] | committer: Michael Niedermayer

audio_frame_queue: fix null ptr dereference

This happened when a frame was removed before any was added.
Fixes part of Ticket1208

Found-by: John Villamil, Piotr Bandurski and Carl Eugen Hoyos
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3938a0eeae24a335b181d753c464cf5bab33ff01
---

 libavcodec/audio_frame_queue.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libavcodec/audio_frame_queue.c b/libavcodec/audio_frame_queue.c
index 31cab29..999aa93 100644
--- a/libavcodec/audio_frame_queue.c
+++ b/libavcodec/audio_frame_queue.c
@@ -100,7 +100,7 @@ void ff_af_queue_remove(AudioFrameQueue *afq, int nb_samples, int64_t *pts,
 
     if(nb_samples){
         av_assert0(!afq->frame_count);
-        if(afq->frames[0].pts != AV_NOPTS_VALUE)
+        if(afq->frames && afq->frames[0].pts != AV_NOPTS_VALUE)
             afq->frames[0].pts += nb_samples;
         av_log(afq->avctx, AV_LOG_DEBUG, "Trying to remove %d more samples than are in the que\n", nb_samples);
     }