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videorate: Only "close" the segment if it is discontinous

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Otherwise, it will drop valid buffers on a simple segment update

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/767>
This commit is contained in:
Olivier Crête 2020-07-24 17:41:57 -04:00 committed by Olivier Crête
parent a76f38b2c7
commit 6f7922b4db
2 changed files with 60 additions and 40 deletions
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94
gst/videorate/gstvideorate.c
View file

@ -794,48 +794,14 @@ gst_video_rate_sink_event (GstBaseTransform * trans, GstEvent * event)
{
GstSegment segment;
gint seqnum;
GstClockTime base_ts, next_ts;
gboolean reset_base_ts = FALSE;
gst_event_copy_segment (event, &segment);
if (segment.format != GST_FORMAT_TIME)
goto format_error;
GST_DEBUG_OBJECT (videorate, "handle NEWSEGMENT");
/* close up the previous segment, if appropriate */
if (videorate->prevbuf) {
gint count = 0;
GstFlowReturn res;
res = GST_FLOW_OK;
/* fill up to the end of current segment,
* or only send out the stored buffer if there is no specific stop.
* regardless, prevent going loopy in strange cases */
while (res == GST_FLOW_OK && count <= MAGIC_LIMIT
&& !videorate->drop_only
&& ((videorate->segment.rate > 0.0
&& GST_CLOCK_TIME_IS_VALID (videorate->segment.stop)
&& GST_CLOCK_TIME_IS_VALID (videorate->next_ts)
&& videorate->next_ts - videorate->segment.base <
videorate->segment.stop) || (videorate->segment.rate < 0.0
&& GST_CLOCK_TIME_IS_VALID (videorate->segment.start)
&& GST_CLOCK_TIME_IS_VALID (videorate->next_ts)
&& videorate->next_ts - videorate->segment.base >=
videorate->segment.start)
|| count < 1)) {
res =
gst_video_rate_flush_prev (videorate, count > 0,
GST_CLOCK_TIME_NONE);
count++;
}
if (count > 1) {
videorate->dup += count - 1;
if (!videorate->silent)
gst_video_rate_notify_duplicate (videorate);
}
/* clean up for the new one; _chain will resume from the new start */
gst_video_rate_swap_prev (videorate, NULL, 0);
}
GST_DEBUG_OBJECT (videorate, "handle SEGMENT event");
/* We just want to update the accumulated stream_time */
@ -845,20 +811,68 @@ gst_video_rate_sink_event (GstBaseTransform * trans, GstEvent * event)
segment.stop = (gint64) (segment.stop / videorate->rate);
segment.time = (gint64) (segment.time / videorate->rate);
videorate->base_ts = gst_segment_position_from_running_time (&segment,
base_ts = gst_segment_position_from_running_time (&segment,
GST_FORMAT_TIME,
gst_segment_to_running_time (&videorate->segment, GST_FORMAT_TIME,
videorate->base_ts));
videorate->next_ts = gst_segment_position_from_running_time (&segment,
next_ts = gst_segment_position_from_running_time (&segment,
GST_FORMAT_TIME,
gst_segment_to_running_time (&videorate->segment, GST_FORMAT_TIME,
videorate->next_ts));
/* Reset if the segment is discontinuous */
if (next_ts == GST_CLOCK_TIME_NONE) {
reset_base_ts = TRUE;
/* close up the previous segment, if appropriate */
if (videorate->prevbuf) {
gint count = 0;
GstFlowReturn res;
res = GST_FLOW_OK;
/* fill up to the end of current segment,
* or only send out the stored buffer if there is no specific stop.
* regardless, prevent going loopy in strange cases */
while (res == GST_FLOW_OK && count <= MAGIC_LIMIT
&& !videorate->drop_only
&& ((videorate->segment.rate > 0.0
&& GST_CLOCK_TIME_IS_VALID (videorate->segment.stop)
&& GST_CLOCK_TIME_IS_VALID (videorate->next_ts)
&& videorate->next_ts - videorate->segment.base <
videorate->segment.stop) || (videorate->segment.rate < 0.0
&& GST_CLOCK_TIME_IS_VALID (videorate->segment.start)
&& GST_CLOCK_TIME_IS_VALID (videorate->next_ts)
&& videorate->next_ts - videorate->segment.base >=
videorate->segment.start)
|| count < 1)) {
res =
gst_video_rate_flush_prev (videorate, count > 0,
GST_CLOCK_TIME_NONE);
count++;
}
if (count > 1) {
videorate->dup += count - 1;
if (!videorate->silent)
gst_video_rate_notify_duplicate (videorate);
}
/* clean up for the new one; _chain will resume from the new start */
gst_video_rate_swap_prev (videorate, NULL, 0);
}
} else if (base_ts == GST_CLOCK_TIME_NONE) {
reset_base_ts = TRUE;
}
if (reset_base_ts) {
base_ts = 0;
videorate->out_frame_count = 0;
}
videorate->next_ts = next_ts;
videorate->base_ts = base_ts;
gst_segment_copy_into (&segment, &videorate->segment);
GST_DEBUG_OBJECT (videorate, "updated segment: %" GST_SEGMENT_FORMAT,
&videorate->segment);
seqnum = gst_event_get_seqnum (event);
gst_event_unref (event);
event = gst_event_new_segment (&segment);

6
tests/check/elements/videorate.c
View file

@ -1645,12 +1645,17 @@ GST_START_TEST (test_segment_update)
next_ts += GST_SECOND / 25;
}
gst_check_drop_buffers ();
fail_unless_equals_uint64 (next_ts, 1 * GST_SECOND + (GST_SECOND / 25));
/* Send a pointless segment update, shouldn't change anything */
gst_segment_init (&segment, GST_FORMAT_TIME);
segment.position = 5 * GST_SECOND;
fail_unless (gst_pad_push_event (mysrcpad, gst_event_new_segment (&segment)));
/* Shouldnt push anything, rest is same as above */
fail_unless_equals_int (g_list_length (buffers), 0);
assert_videorate_stats (videorate, "second", 2, 26, 0, 25);
/* third buffer */
third = gst_buffer_new_and_alloc (4);
GST_BUFFER_TIMESTAMP (third) = 3 * GST_SECOND;
@ -1671,6 +1676,7 @@ GST_START_TEST (test_segment_update)
next_ts += GST_SECOND / 25;
}
fail_unless_equals_uint64 (next_ts, (25 + 25 + 13) * (GST_SECOND / 25));
/* cleanup */
gst_buffer_unref (first);