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qtdemux: Fix data dropping for fragmented streams

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For fragmented streams with extra data at the end of the mdat
qtdemux was not dropping those bytes and would try to use
that extra data as the beginning of a new atom, causing the
stream to fail.

https://bugzilla.gnome.org/show_bug.cgi?id=743407
This commit is contained in:
Thiago Santos 2015-01-26 17:08:12 -03:00
parent e4ed852041
commit 2586a219f6
1 changed files with 15 additions and 6 deletions
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21
gst/isomp4/qtdemux.c
View file

@ -4910,6 +4910,18 @@ done:
demux->upstream_size = seekable ? stop : -1;
}
static void
gst_qtdemux_drop_data (GstQTDemux * demux, gint bytes)
{
g_return_if_fail (bytes <= demux->todrop);
GST_LOG_OBJECT (demux, "Dropping %d bytes", bytes);
gst_adapter_flush (demux->adapter, bytes);
demux->neededbytes -= bytes;
demux->offset += bytes;
demux->todrop -= bytes;
}
/* FIXME, unverified after edit list updates */
static GstFlowReturn
gst_qtdemux_chain (GstPad * sinkpad, GstObject * parent, GstBuffer * inbuf)
@ -5285,9 +5297,9 @@ gst_qtdemux_process_adapter (GstQTDemux * demux, gboolean force)
} else {
GST_DEBUG_OBJECT (demux, "data atom emptied; resuming atom scan");
/* so we are dropping more than left in this atom */
demux->todrop -= demux->mdatleft;
demux->neededbytes -= demux->mdatleft;
gst_qtdemux_drop_data (demux, demux->mdatleft);
demux->mdatleft = 0;
/* need to resume atom parsing so we do not miss any other pieces */
demux->state = QTDEMUX_STATE_INITIAL;
demux->neededbytes = 16;
@ -5306,10 +5318,7 @@ gst_qtdemux_process_adapter (GstQTDemux * demux, gboolean force)
}
if (demux->todrop) {
GST_LOG_OBJECT (demux, "Dropping %d bytes", demux->todrop);
gst_adapter_flush (demux->adapter, demux->todrop);
demux->neededbytes -= demux->todrop;
demux->offset += demux->todrop;
gst_qtdemux_drop_data (demux, demux->todrop);
}
/* first buffer? */