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flvdemux: Do not build an index if upstream is not seekable

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An index is not useful if upstream cannot handle seeks and building it
for infinite files, for instance FLV streams, results in a memory leak.
This commit is contained in:
Jan Urbański 2011-03-27 21:39:50 +02:00 committed by Sebastian Dröge
parent e7a63c34ac
commit 9c5a12c11f
2 changed files with 44 additions and 0 deletions
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43
gst/flv/gstflvdemux.c
View file

@ -103,6 +103,10 @@ gst_flv_demux_parse_and_add_index_entry (GstFlvDemux * demux, GstClockTime ts,
"adding key=%d association %" GST_TIME_FORMAT "-> %" G_GUINT64_FORMAT,
keyframe, GST_TIME_ARGS (ts), pos);
/* if upstream is not seekable there is no point in building an index */
if (!demux->upstream_seekable)
return;
/* entry may already have been added before, avoid adding indefinitely */
entry = gst_index_get_assoc_entry (demux->index, demux->index_id,
GST_INDEX_LOOKUP_EXACT, GST_ASSOCIATION_FLAG_NONE, GST_FORMAT_BYTES, pos);
@ -186,6 +190,41 @@ gst_flv_demux_query_types (GstPad * pad)
return query_types;
}
static void
gst_flv_demux_check_seekability (GstFlvDemux * demux)
{
GstQuery *query;
gint64 start = -1, stop = -1;
demux->upstream_seekable = FALSE;
query = gst_query_new_seeking (GST_FORMAT_BYTES);
if (!gst_pad_peer_query (demux->sinkpad, query)) {
GST_DEBUG_OBJECT (demux, "seeking query failed");
return;
}
gst_query_parse_seeking (query, NULL, &demux->upstream_seekable,
&start, &stop);
/* try harder to query upstream size if we didn't get it the first time */
if (demux->upstream_seekable && stop == -1) {
GstFormat fmt = GST_FORMAT_BYTES;
GST_DEBUG_OBJECT (demux, "doing duration query to fix up unset stop");
gst_pad_query_peer_duration (demux->sinkpad, &fmt, &stop);
}
/* if upstream doesn't know the size, it's likely that it's not seekable in
* practice even if it technically may be seekable */
if (demux->upstream_seekable && (start != 0 || stop <= start)) {
GST_DEBUG_OBJECT (demux, "seekable but unknown start/stop -> disable");
demux->upstream_seekable = FALSE;
}
GST_DEBUG_OBJECT (demux, "upstream seekable: %d", demux->upstream_seekable);
}
static void
parse_flv_demux_parse_date_string (GDate * date, const gchar * s)
{
@ -1491,6 +1530,9 @@ gst_flv_demux_parse_header (GstFlvDemux * demux, GstBuffer * buffer)
}
}
/* do a one-time seekability check */
gst_flv_demux_check_seekability (demux);
/* We don't care about the rest */
demux->need_header = FALSE;
@ -1544,6 +1586,7 @@ gst_flv_demux_cleanup (GstFlvDemux * demux)
demux->got_par = FALSE;
demux->indexed = FALSE;
demux->upstream_seekable = FALSE;
demux->file_size = 0;
demux->index_max_pos = 0;

1
gst/flv/gstflvdemux.h
View file

@ -123,6 +123,7 @@ struct _GstFlvDemux
gboolean seeking;
gboolean building_index;
gboolean indexed; /* TRUE if index is completely built */
gboolean upstream_seekable; /* TRUE if upstream is seekable */
gint64 file_size;
GstEvent *seek_event;
gint64 seek_time;