[FFmpeg-cvslog] movenc: Keep writing zero-entry stts atoms as intended

[Martin Storsjö]

ffmpeg | branch: master | Martin Storsjö <martin at martin.st> | Fri Mar  6 12:27:14 2015 +0200| [9731cf4001377fa2f75c279072cc2b0cbd57bf8e] | committer: Martin Storsjö

movenc: Keep writing zero-entry stts atoms as intended

a876585215 had the unintended side effect of returning AVERROR(ENOMEM)
when track->entry is zero, while the code intentionally wants to
continue in that case.

Signed-off-by: Martin Storsjö <martin at martin.st>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9731cf4001377fa2f75c279072cc2b0cbd57bf8e
---

 libavformat/movenc.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 585b080..343f321 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -1197,7 +1197,7 @@ static int mov_write_ctts_tag(AVIOContext *pb, MOVTrack *track)
 /* Time to sample atom */
 static int mov_write_stts_tag(AVIOContext *pb, MOVTrack *track)
 {
-    MOVStts *stts_entries;
+    MOVStts *stts_entries = NULL;
     uint32_t entries = -1;
     uint32_t atom_size;
     int i;
@@ -1210,11 +1210,11 @@ static int mov_write_stts_tag(AVIOContext *pb, MOVTrack *track)
         stts_entries[0].duration = 1;
         entries = 1;
     } else {
-        stts_entries = track->entry ?
-                       av_malloc(track->entry * sizeof(*stts_entries)) : /* worst case */
-                       NULL;
-        if (!stts_entries)
-            return AVERROR(ENOMEM);
+        if (track->entry) {
+            stts_entries = av_malloc(track->entry * sizeof(*stts_entries)); /* worst case */
+            if (!stts_entries)
+                return AVERROR(ENOMEM);
+        }
         for (i = 0; i < track->entry; i++) {
             int duration = get_cluster_duration(track, i);
             if (i && duration == stts_entries[entries].duration) {