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pad-monitor: Update checks for MISSING_DISCONT
* Some SEGMENT might be updates caused by calling gst_pad_set_offset(), which will send the same segment but with an updated offset and/or based field. For those segments, we don't require a DISCONT on the following buffer. * Ignore differences in flags, they aren't relevant for now to figure out whether the segment is an update or not * Ignore difference in 'position', it's only meant for internal usage by elements. * Changes in the end position (stop in forward playback and start in reverse playback) are considering updates Furthermore, also expect a DISCONT flag on the first buffer following a STREAM_START.
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0711d4e163
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1 changed files with 33 additions and 2 deletions
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@ -1703,6 +1703,31 @@ gst_validate_monitor_find_next_buffer (GstValidatePadMonitor * pad_monitor)
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pad_monitor->current_buf = tmp;
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}
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/* Checks whether a segment is just an update of another,
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* That is to say that only the base and offset field differ and all
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* other fields are identical */
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static gboolean
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is_segment_update (GstSegment * a, const GstSegment * b)
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{
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/* Note : We never care about the position field, it is only
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* used for internal usage by elements */
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if (a->rate == b->rate &&
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a->applied_rate == b->applied_rate &&
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a->format == b->format && a->time == b->time) {
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/* Changes in base/offset are considered updates */
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/* Updating the end position of a segment is an update */
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/* Updating the duration of a segment is an update */
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if (a->rate > 0.0) {
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if (a->start == b->start)
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return TRUE;
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} else {
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if (a->stop == b->stop)
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return TRUE;
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}
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}
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return FALSE;
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}
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static GstFlowReturn
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gst_validate_pad_monitor_downstream_event_check (GstValidatePadMonitor *
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pad_monitor, GstObject * parent, GstEvent * event,
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@ -1717,6 +1742,10 @@ gst_validate_pad_monitor_downstream_event_check (GstValidatePadMonitor *
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/* pre checks */
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_STREAM_START:
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/* Buffers following a STREAM_START should have the DISCONT flag set */
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pad_monitor->pending_buffer_discont = TRUE;
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break;
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case GST_EVENT_SEGMENT:
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/* parse segment data to be used if event is handled */
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gst_event_parse_segment (event, &segment);
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@ -1744,8 +1773,6 @@ gst_validate_pad_monitor_downstream_event_check (GstValidatePadMonitor *
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}
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pad_monitor->pending_eos_seqnum = seqnum;
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/* Buffers following a SEGMENT should have the DISCONT flag set */
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pad_monitor->pending_buffer_discont = TRUE;
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if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
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gst_validate_pad_monitor_add_expected_newsegment (pad_monitor, event);
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@ -1839,6 +1866,10 @@ gst_validate_pad_monitor_downstream_event_check (GstValidatePadMonitor *
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEGMENT:
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if (ret == GST_FLOW_OK) {
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/* If the new segment is not an update of the previous one, then
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* the following buffer should have the DISCONT flag set */
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if (!is_segment_update (&pad_monitor->segment, segment))
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pad_monitor->pending_buffer_discont = TRUE;
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if (!pad_monitor->has_segment
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&& pad_monitor->segment.format != segment->format) {
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gst_segment_init (&pad_monitor->segment, segment->format);
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