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oggdemux: guard against wrong granulepos

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Clamp the initial granulepos to 0 instead of going negative for some badly muxed
ogg files.
This commit is contained in:
Wim Taymans 2009-12-04 13:14:57 +01:00
parent 05f4605180
commit 96e1c4dbe6
2 changed files with 28 additions and 26 deletions
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33
ext/ogg/gstoggdemux.c
View file

@ -513,6 +513,8 @@ gst_ogg_demux_chain_peer (GstOggPad * pad, ogg_packet * packet)
duration = gst_ogg_stream_get_packet_duration (&pad->map, packet);
GST_DEBUG_OBJECT (ogg, "duration %" G_GUINT64_FORMAT, duration);
if (packet->b_o_s) {
GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
GST_BUFFER_DURATION (buf) = GST_CLOCK_TIME_NONE;
@ -527,16 +529,29 @@ gst_ogg_demux_chain_peer (GstOggPad * pad, ogg_packet * packet)
gst_ogg_stream_granulepos_to_key_granule (&pad->map,
packet->granulepos);
}
GST_DEBUG_OBJECT (ogg, "current granule %" G_GUINT64_FORMAT,
pad->current_granule);
if (pad->map.is_ogm) {
GST_BUFFER_TIMESTAMP (buf) = gst_ogg_stream_granule_to_time (&pad->map,
pad->current_granule);
GST_BUFFER_DURATION (buf) = gst_util_uint64_scale (duration,
GST_SECOND * pad->map.granulerate_d, pad->map.granulerate_n);
} else {
guint64 endtime;
GST_BUFFER_TIMESTAMP (buf) = gst_ogg_stream_granule_to_time (&pad->map,
pad->current_granule - duration);
GST_BUFFER_DURATION (buf) = gst_ogg_stream_granule_to_time (&pad->map,
pad->current_granule) - GST_BUFFER_TIMESTAMP (buf);
GST_DEBUG_OBJECT (ogg, "current granule time %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
endtime =
gst_ogg_stream_granule_to_time (&pad->map, pad->current_granule);
GST_DEBUG_OBJECT (ogg, "current granule end time %" GST_TIME_FORMAT,
GST_TIME_ARGS (endtime));
GST_BUFFER_DURATION (buf) = endtime - GST_BUFFER_TIMESTAMP (buf);
GST_DEBUG_OBJECT (ogg, "current duration %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
}
GST_BUFFER_OFFSET_END (buf) =
gst_ogg_stream_granule_to_granulepos (&pad->map, pad->current_granule,
@ -657,16 +672,24 @@ gst_ogg_pad_submit_packet (GstOggPad * pad, ogg_packet * packet)
if (!packet->b_o_s) {
if (pad->start_time == GST_CLOCK_TIME_NONE) {
gint64 duration = gst_ogg_stream_get_packet_duration (&pad->map, packet);
GST_DEBUG ("duration %" G_GINT64_FORMAT, duration);
if (duration != -1) {
pad->map.accumulated_granule += duration;
GST_DEBUG ("accumulated granule %" G_GINT64_FORMAT,
pad->map.accumulated_granule);
}
if (packet->granulepos != -1) {
ogg_int64_t start_granule;
gint64 granule;
start_granule =
gst_ogg_stream_granulepos_to_granule (&pad->map,
packet->granulepos) - pad->map.accumulated_granule;
granule = gst_ogg_stream_granulepos_to_granule (&pad->map,
packet->granulepos);
if (granule > pad->map.accumulated_granule)
start_granule = granule - pad->map.accumulated_granule;
else
start_granule = 0;
pad->start_time = gst_ogg_stream_granule_to_time (&pad->map,
start_granule);

21
ext/ogg/gstoggdemux.h
View file

@ -89,32 +89,11 @@ struct _GstOggPad
gboolean have_type;
GstOggPadMode mode;
#if 0
GstPad *elem_pad; /* sinkpad of internal element */
GstElement *element; /* internal element */
GstPad *elem_out; /* our sinkpad to receive buffers form the internal element */
#endif
GstOggChain *chain; /* the chain we are part of */
GstOggDemux *ogg; /* the ogg demuxer we are part of */
//GList *headers;
GstOggStream map;
#if 0
gint map;
gboolean is_skeleton;
gboolean have_fisbone;
gint granulerate_n;
gint granulerate_d;
guint32 preroll;
guint granuleshift;
gint n_header_packets;
gint n_header_packets_seen;
gint64 accumulated_granule;
gint frame_size;
#endif
//gint serialno;
gint64 packetno;
gint64 current_granule;
gint64 keyframe_granule;