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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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adaptivedemux: Move SEEK handling to a separate function
Just for code readability. Doesn't change behaviour
This commit is contained in:
Edward Hervey
Sebastian Dröge
parent
d33352edb5
commit
deb686cfe1
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@ -1261,225 +1261,228 @@ gst_adaptive_demux_can_seek (GstAdaptiveDemux * demux)
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GST_SEEK_FLAG_SNAP_AFTER | \
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GST_SEEK_FLAG_SNAP_NEAREST))
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static gboolean
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gst_adaptive_demux_handle_seek_event (GstAdaptiveDemux * demux, GstPad * pad,
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GstEvent * event)
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{
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GstAdaptiveDemuxClass *demux_class = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
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gdouble rate;
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GstFormat format;
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GstSeekFlags flags;
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GstSeekType start_type, stop_type;
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gint64 start, stop;
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guint32 seqnum;
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gboolean update;
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gboolean ret;
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GstSegment oldsegment;
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GstAdaptiveDemuxStream *stream = NULL;
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GST_INFO_OBJECT (demux, "Received seek event");
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GST_API_LOCK (demux);
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GST_MANIFEST_LOCK (demux);
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if (!gst_adaptive_demux_can_seek (demux)) {
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GST_MANIFEST_UNLOCK (demux);
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GST_API_UNLOCK (demux);
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gst_event_unref (event);
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return FALSE;
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}
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gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
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&stop_type, &stop);
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if (format != GST_FORMAT_TIME) {
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GST_MANIFEST_UNLOCK (demux);
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GST_API_UNLOCK (demux);
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gst_event_unref (event);
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return FALSE;
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}
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if (gst_adaptive_demux_is_live (demux)) {
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gint64 range_start, range_stop;
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if (!gst_adaptive_demux_get_live_seek_range (demux, &range_start,
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&range_stop)) {
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GST_MANIFEST_UNLOCK (demux);
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GST_API_UNLOCK (demux);
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gst_event_unref (event);
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return FALSE;
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}
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if (start < range_start || start >= range_stop) {
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GST_MANIFEST_UNLOCK (demux);
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GST_API_UNLOCK (demux);
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GST_WARNING_OBJECT (demux, "Seek to invalid position");
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gst_event_unref (event);
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return FALSE;
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}
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}
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seqnum = gst_event_get_seqnum (event);
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GST_DEBUG_OBJECT (demux, "seek event, %" GST_PTR_FORMAT, event);
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/* have a backup in case seek fails */
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gst_segment_copy_into (&demux->segment, &oldsegment);
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if (flags & GST_SEEK_FLAG_FLUSH) {
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GstEvent *fevent;
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GST_DEBUG_OBJECT (demux, "sending flush start");
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fevent = gst_event_new_flush_start ();
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gst_event_set_seqnum (fevent, seqnum);
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gst_adaptive_demux_push_src_event (demux, fevent);
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gst_adaptive_demux_stop_tasks (demux);
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} else if ((rate > 0 && start_type != GST_SEEK_TYPE_NONE) ||
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(rate < 0 && stop_type != GST_SEEK_TYPE_NONE)) {
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gst_adaptive_demux_stop_tasks (demux);
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}
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GST_ADAPTIVE_DEMUX_SEGMENT_LOCK (demux);
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/*
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* Handle snap seeks as follows:
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* 1) do the snap seeking on the stream that received
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* the event
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* 2) use the final position on this stream to seek
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* on the other streams to the same position
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*
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* We can't snap at all streams at the same time as
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* they might end in different positions, so just
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* use the one that received the event as the 'leading'
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* one to do the snap seek.
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*/
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if (IS_SNAP_SEEK (flags) && demux_class->stream_seek && (stream =
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gst_adaptive_demux_find_stream_for_pad (demux, pad))) {
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GstClockTime ts;
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GstSeekFlags stream_seek_flags = flags;
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/* snap-seek on the stream that received the event and then
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* use the resulting position to seek on all streams */
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if (rate >= 0) {
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if (start_type != GST_SEEK_TYPE_NONE)
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ts = start;
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else {
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ts = stream->segment.position;
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start_type = GST_SEEK_TYPE_SET;
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}
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} else {
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if (stop_type != GST_SEEK_TYPE_NONE)
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ts = stop;
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else {
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stop_type = GST_SEEK_TYPE_SET;
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ts = stream->segment.position;
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}
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}
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demux_class->stream_seek (stream, rate >= 0, stream_seek_flags, ts, &ts);
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/* replace event with a new one without snaping to seek on all streams */
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gst_event_unref (event);
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if (rate >= 0) {
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start = ts;
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} else {
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stop = ts;
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}
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event =
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gst_event_new_seek (rate, format, REMOVE_SNAP_FLAGS (flags),
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start_type, start, stop_type, stop);
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GST_DEBUG_OBJECT (demux, "Adapted snap seek to %" GST_PTR_FORMAT, event);
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}
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stream = NULL;
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gst_segment_do_seek (&demux->segment, rate, format, flags, start_type,
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start, stop_type, stop, &update);
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/* FIXME - this seems unatural, do_seek() is updating base when we
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* only want the start/stop position to change, maybe do_seek() needs
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* some fixing? */
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if (!(flags & GST_SEEK_FLAG_FLUSH) && ((rate > 0
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&& start_type == GST_SEEK_TYPE_NONE) || (rate < 0
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&& stop_type == GST_SEEK_TYPE_NONE))) {
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demux->segment.base = oldsegment.base;
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}
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GST_DEBUG_OBJECT (demux, "Calling subclass seek: %" GST_PTR_FORMAT, event);
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ret = demux_class->seek (demux, event);
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if (!ret) {
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/* Is there anything else we can do if it fails? */
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gst_segment_copy_into (&oldsegment, &demux->segment);
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} else {
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demux->priv->segment_seqnum = seqnum;
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}
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GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
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if (flags & GST_SEEK_FLAG_FLUSH) {
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GstEvent *fevent;
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GST_DEBUG_OBJECT (demux, "Sending flush stop on all pad");
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fevent = gst_event_new_flush_stop (TRUE);
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gst_event_set_seqnum (fevent, seqnum);
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gst_adaptive_demux_push_src_event (demux, fevent);
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}
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if (demux->next_streams) {
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gst_adaptive_demux_expose_streams (demux, FALSE);
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} else {
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GList *iter;
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GstClockTime period_start =
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gst_adaptive_demux_get_period_start_time (demux);
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GST_ADAPTIVE_DEMUX_SEGMENT_LOCK (demux);
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for (iter = demux->streams; iter; iter = g_list_next (iter)) {
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GstAdaptiveDemuxStream *stream = iter->data;
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GstEvent *seg_evt;
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GstClockTime offset;
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/* See comments in gst_adaptive_demux_get_period_start_time() for
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* an explanation of the segment modifications */
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stream->segment = demux->segment;
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offset =
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gst_adaptive_demux_stream_get_presentation_offset (demux, stream);
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stream->segment.start += offset - period_start;
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if (demux->segment.rate > 0 && start_type != GST_SEEK_TYPE_NONE)
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stream->segment.position = stream->segment.start;
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else if (demux->segment.rate < 0 && stop_type != GST_SEEK_TYPE_NONE)
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stream->segment.position = stream->segment.stop;
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seg_evt = gst_event_new_segment (&stream->segment);
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gst_event_set_seqnum (seg_evt, demux->priv->segment_seqnum);
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gst_event_replace (&stream->pending_segment, seg_evt);
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gst_event_unref (seg_evt);
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/* Make sure the first buffer after a seek has the discont flag */
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stream->discont = TRUE;
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}
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GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
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}
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/* Restart the demux */
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gst_adaptive_demux_start_tasks (demux);
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GST_MANIFEST_UNLOCK (demux);
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GST_API_UNLOCK (demux);
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gst_event_unref (event);
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return ret;
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}
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static gboolean
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gst_adaptive_demux_src_event (GstPad * pad, GstObject * parent,
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GstEvent * event)
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{
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GstAdaptiveDemux *demux;
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GstAdaptiveDemuxClass *demux_class;
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demux = GST_ADAPTIVE_DEMUX_CAST (parent);
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demux_class = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
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/* FIXME handle events received on pads that are to be removed */
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switch (event->type) {
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case GST_EVENT_SEEK:
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{
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gdouble rate;
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GstFormat format;
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GstSeekFlags flags;
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GstSeekType start_type, stop_type;
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gint64 start, stop;
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guint32 seqnum;
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gboolean update;
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gboolean ret = TRUE;
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GstSegment oldsegment;
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GstAdaptiveDemuxStream *stream = NULL;
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GST_INFO_OBJECT (demux, "Received seek event");
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GST_API_LOCK (demux);
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GST_MANIFEST_LOCK (demux);
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if (!gst_adaptive_demux_can_seek (demux)) {
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GST_MANIFEST_UNLOCK (demux);
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GST_API_UNLOCK (demux);
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gst_event_unref (event);
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return FALSE;
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}
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gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
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&stop_type, &stop);
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if (format != GST_FORMAT_TIME) {
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GST_MANIFEST_UNLOCK (demux);
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GST_API_UNLOCK (demux);
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gst_event_unref (event);
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return FALSE;
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}
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if (gst_adaptive_demux_is_live (demux)) {
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gint64 range_start, range_stop;
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if (!gst_adaptive_demux_get_live_seek_range (demux, &range_start,
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&range_stop)) {
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GST_MANIFEST_UNLOCK (demux);
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GST_API_UNLOCK (demux);
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gst_event_unref (event);
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return FALSE;
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}
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if (start < range_start || start >= range_stop) {
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GST_MANIFEST_UNLOCK (demux);
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GST_API_UNLOCK (demux);
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GST_WARNING_OBJECT (demux, "Seek to invalid position");
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gst_event_unref (event);
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return FALSE;
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}
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}
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seqnum = gst_event_get_seqnum (event);
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GST_DEBUG_OBJECT (demux, "seek event, %" GST_PTR_FORMAT, event);
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/* have a backup in case seek fails */
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gst_segment_copy_into (&demux->segment, &oldsegment);
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if (flags & GST_SEEK_FLAG_FLUSH) {
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GstEvent *fevent;
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GST_DEBUG_OBJECT (demux, "sending flush start");
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fevent = gst_event_new_flush_start ();
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gst_event_set_seqnum (fevent, seqnum);
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gst_adaptive_demux_push_src_event (demux, fevent);
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gst_adaptive_demux_stop_tasks (demux);
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} else if ((rate > 0 && start_type != GST_SEEK_TYPE_NONE) ||
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(rate < 0 && stop_type != GST_SEEK_TYPE_NONE)) {
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gst_adaptive_demux_stop_tasks (demux);
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}
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GST_ADAPTIVE_DEMUX_SEGMENT_LOCK (demux);
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/*
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* Handle snap seeks as follows:
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* 1) do the snap seeking on the stream that received
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* the event
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* 2) use the final position on this stream to seek
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* on the other streams to the same position
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*
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* We can't snap at all streams at the same time as
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* they might end in different positions, so just
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* use the one that received the event as the 'leading'
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* one to do the snap seek.
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*/
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if (IS_SNAP_SEEK (flags) && demux_class->stream_seek && (stream =
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gst_adaptive_demux_find_stream_for_pad (demux, pad))) {
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GstClockTime ts;
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GstSeekFlags stream_seek_flags = flags;
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/* snap-seek on the stream that received the event and then
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* use the resulting position to seek on all streams */
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if (rate >= 0) {
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if (start_type != GST_SEEK_TYPE_NONE)
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ts = start;
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else {
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ts = stream->segment.position;
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start_type = GST_SEEK_TYPE_SET;
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}
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} else {
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if (stop_type != GST_SEEK_TYPE_NONE)
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ts = stop;
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else {
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stop_type = GST_SEEK_TYPE_SET;
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ts = stream->segment.position;
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}
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}
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demux_class->stream_seek (stream, rate >= 0, stream_seek_flags, ts,
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&ts);
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/* replace event with a new one without snaping to seek on all streams */
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gst_event_unref (event);
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if (rate >= 0) {
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start = ts;
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} else {
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stop = ts;
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}
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event =
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gst_event_new_seek (rate, format, REMOVE_SNAP_FLAGS (flags),
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start_type, start, stop_type, stop);
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GST_DEBUG_OBJECT (demux, "Adapted snap seek to %" GST_PTR_FORMAT,
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event);
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}
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stream = NULL;
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gst_segment_do_seek (&demux->segment, rate, format, flags, start_type,
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start, stop_type, stop, &update);
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/* FIXME - this seems unatural, do_seek() is updating base when we
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* only want the start/stop position to change, maybe do_seek() needs
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* some fixing? */
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if (!(flags & GST_SEEK_FLAG_FLUSH) && ((rate > 0
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&& start_type == GST_SEEK_TYPE_NONE) || (rate < 0
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&& stop_type == GST_SEEK_TYPE_NONE))) {
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demux->segment.base = oldsegment.base;
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}
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GST_DEBUG_OBJECT (demux, "Calling subclass seek: %" GST_PTR_FORMAT,
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event);
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ret = demux_class->seek (demux, event);
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if (!ret) {
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/* Is there anything else we can do if it fails? */
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gst_segment_copy_into (&oldsegment, &demux->segment);
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} else {
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demux->priv->segment_seqnum = seqnum;
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}
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GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
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if (flags & GST_SEEK_FLAG_FLUSH) {
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GstEvent *fevent;
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GST_DEBUG_OBJECT (demux, "Sending flush stop on all pad");
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fevent = gst_event_new_flush_stop (TRUE);
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gst_event_set_seqnum (fevent, seqnum);
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gst_adaptive_demux_push_src_event (demux, fevent);
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}
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if (demux->next_streams) {
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gst_adaptive_demux_expose_streams (demux, FALSE);
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} else {
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GList *iter;
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GstClockTime period_start =
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gst_adaptive_demux_get_period_start_time (demux);
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GST_ADAPTIVE_DEMUX_SEGMENT_LOCK (demux);
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for (iter = demux->streams; iter; iter = g_list_next (iter)) {
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GstAdaptiveDemuxStream *stream = iter->data;
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GstEvent *seg_evt;
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GstClockTime offset;
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/* See comments in gst_adaptive_demux_get_period_start_time() for
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* an explanation of the segment modifications */
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stream->segment = demux->segment;
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offset =
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gst_adaptive_demux_stream_get_presentation_offset (demux, stream);
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stream->segment.start += offset - period_start;
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if (demux->segment.rate > 0 && start_type != GST_SEEK_TYPE_NONE)
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stream->segment.position = stream->segment.start;
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else if (demux->segment.rate < 0 && stop_type != GST_SEEK_TYPE_NONE)
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stream->segment.position = stream->segment.stop;
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seg_evt = gst_event_new_segment (&stream->segment);
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gst_event_set_seqnum (seg_evt, demux->priv->segment_seqnum);
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gst_event_replace (&stream->pending_segment, seg_evt);
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gst_event_unref (seg_evt);
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/* Make sure the first buffer after a seek has the discont flag */
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stream->discont = TRUE;
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}
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GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
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}
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/* Restart the demux */
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gst_adaptive_demux_start_tasks (demux);
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GST_MANIFEST_UNLOCK (demux);
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GST_API_UNLOCK (demux);
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gst_event_unref (event);
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return ret;
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return gst_adaptive_demux_handle_seek_event (demux, pad, event);
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}
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case GST_EVENT_RECONFIGURE:{
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GstAdaptiveDemuxStream *stream;
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