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pad-monitor: Update checks for MISSING_DISCONT

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* 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.
This commit is contained in:
Edward Hervey 2016-05-20 09:07:01 +02:00 committed by Edward Hervey
parent 0711d4e163
commit 843578835f
1 changed files with 33 additions and 2 deletions
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35
validate/gst/validate/gst-validate-pad-monitor.c
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@ -1703,6 +1703,31 @@ gst_validate_monitor_find_next_buffer (GstValidatePadMonitor * pad_monitor)
pad_monitor->current_buf = tmp;
}
/* Checks whether a segment is just an update of another,
* That is to say that only the base and offset field differ and all
* other fields are identical */
static gboolean
is_segment_update (GstSegment * a, const GstSegment * b)
{
/* Note : We never care about the position field, it is only
* used for internal usage by elements */
if (a->rate == b->rate &&
a->applied_rate == b->applied_rate &&
a->format == b->format && a->time == b->time) {
/* Changes in base/offset are considered updates */
/* Updating the end position of a segment is an update */
/* Updating the duration of a segment is an update */
if (a->rate > 0.0) {
if (a->start == b->start)
return TRUE;
} else {
if (a->stop == b->stop)
return TRUE;
}
}
return FALSE;
}
static GstFlowReturn
gst_validate_pad_monitor_downstream_event_check (GstValidatePadMonitor *
pad_monitor, GstObject * parent, GstEvent * event,
@ -1717,6 +1742,10 @@ gst_validate_pad_monitor_downstream_event_check (GstValidatePadMonitor *
/* pre checks */
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_STREAM_START:
/* Buffers following a STREAM_START should have the DISCONT flag set */
pad_monitor->pending_buffer_discont = TRUE;
break;
case GST_EVENT_SEGMENT:
/* parse segment data to be used if event is handled */
gst_event_parse_segment (event, &segment);
@ -1744,8 +1773,6 @@ gst_validate_pad_monitor_downstream_event_check (GstValidatePadMonitor *
}
pad_monitor->pending_eos_seqnum = seqnum;
/* Buffers following a SEGMENT should have the DISCONT flag set */
pad_monitor->pending_buffer_discont = TRUE;
if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
gst_validate_pad_monitor_add_expected_newsegment (pad_monitor, event);
@ -1839,6 +1866,10 @@ gst_validate_pad_monitor_downstream_event_check (GstValidatePadMonitor *
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
if (ret == GST_FLOW_OK) {
/* If the new segment is not an update of the previous one, then
* the following buffer should have the DISCONT flag set */
if (!is_segment_update (&pad_monitor->segment, segment))
pad_monitor->pending_buffer_discont = TRUE;
if (!pad_monitor->has_segment
&& pad_monitor->segment.format != segment->format) {
gst_segment_init (&pad_monitor->segment, segment->format);