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Code Issues 1 Projects Releases Wiki Activity

qtdemux: make empty subtitle buffer recognition more robust

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=696244
This commit is contained in:
Matej Knopp 2013-03-23 04:56:36 +01:00 committed by Tim-Philipp Müller
parent 220d341b77
commit f29e62c131
1 changed files with 7 additions and 8 deletions
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15
gst/isomp4/qtdemux.c
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@ -3603,17 +3603,15 @@ gst_qtdemux_process_buffer (GstQTDemux * qtdemux, QtDemuxStream * stream,
gst_buffer_map (buf, &map, GST_MAP_READ);
/* empty buffer can be send to terminate previous entry */
if (map.size == 2 && map.data[0] == 0 && map.data[1] == 0) {
/* empty buffer is sent to terminate previous subtitle */
if (map.size <= 2) {
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
return NULL;
}
if (G_LIKELY (map.size >= 2)) {
nsize = GST_READ_UINT16_BE (map.data);
nsize = MIN (nsize, map.size - 2);
}
nsize = GST_READ_UINT16_BE (map.data);
nsize = MIN (nsize, map.size - 2);
GST_LOG_OBJECT (qtdemux, "3GPP timed text subtitle: %d/%" G_GSIZE_FORMAT "",
nsize, map.size);
@ -3626,8 +3624,9 @@ gst_qtdemux_process_buffer (GstQTDemux * qtdemux, QtDemuxStream * stream,
gst_buffer_unref (buf);
buf = _gst_buffer_new_wrapped (str, strlen (str), g_free);
} else {
/* may be 0-size subtitle, which is also sent to keep pipeline going */
gst_buffer_resize (buf, 2, nsize);
/* this should not really happen unless the subtitle is corrupted */
gst_buffer_unref (buf);
buf = NULL;
}
/* FIXME ? convert optional subsequent style info to markup */