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videorate: Fix max-duplication-time handling

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Previously this would've only set discont=TRUE and then for all future
buffers simply returned immediately.

Instead we also need to
  a) drain previous input until its buffer time
  b) update next_ts and base_ts accordingly for the gap
  c) actually store the new buffer after the gap so it can be used in
     the future and so the old buffer before the gap is gone

Also update the unit test accordingly so that it actually tests for this
behaviour. Previously it only tested that after the gap we got no output
at all.
This commit is contained in:
Sebastian Dröge 2019-10-28 14:43:50 +02:00 committed by GStreamer Merge Bot
parent dc274ea9ca
commit c363747251
2 changed files with 82 additions and 6 deletions
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38
gst/videorate/gstvideorate.c
View file

@ -1471,9 +1471,47 @@ gst_video_rate_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
* the order is reversed. */
if (ABS (GST_CLOCK_DIFF (intime,
prevtime)) > videorate->max_duplication_time) {
GST_DEBUG_OBJECT (videorate,
"The new buffer (%" GST_TIME_FORMAT
") is further away from previous buffer (%"
GST_TIME_FORMAT ") than max-duplication-time (%" GST_TIME_FORMAT
")", GST_TIME_ARGS (intime), GST_TIME_ARGS (prevtime),
GST_TIME_ARGS (videorate->max_duplication_time));
/* First send out enough buffers to actually reach the time of the
* previous buffer */
if (videorate->segment.rate < 0.0) {
while (videorate->next_ts > prevtime) {
gst_video_rate_flush_prev (videorate, count > 0,
GST_CLOCK_TIME_NONE);
count += 1;
}
} else {
while (videorate->next_ts <= prevtime) {
gst_video_rate_flush_prev (videorate, count > 0,
GST_CLOCK_TIME_NONE);
count += 1;
}
}
if (count > 1) {
videorate->dup += count - 1;
if (!videorate->silent)
gst_video_rate_notify_duplicate (videorate);
}
/* The gap between the two buffers is too large. Don't fill it, just
* let a discont through */
videorate->discont = TRUE;
if (videorate->segment.rate < 0.0) {
videorate->base_ts -= prevtime - intime;
} else {
videorate->base_ts += intime - prevtime;
}
videorate->next_ts = intime;
/* Swap in new buffer and get rid of old buffer so that starting with
* the next input buffer we output from the new position */
gst_video_rate_swap_prev (videorate, buffer, intime);
goto done;
}
}

50
tests/check/elements/videorate.c
View file

@ -402,11 +402,11 @@ GST_START_TEST (test_wrong_order_from_zero)
GST_END_TEST;
/* send frames with 0, 1, 2, 5 seconds, max-duplication-time=2sec */
/* send frames with 0, 1, 2, 5, 6 seconds, max-duplication-time=2sec */
GST_START_TEST (test_max_duplication_time)
{
GstElement *videorate;
GstBuffer *first, *second, *third, *fourth, *outbuffer;
GstBuffer *first, *second, *third, *fourth, *fifth, *outbuffer;
GstCaps *caps;
videorate = setup_videorate ();
@ -466,6 +466,7 @@ GST_START_TEST (test_max_duplication_time)
fail_unless_equals_int (g_list_length (buffers), 38);
ASSERT_BUFFER_REFCOUNT (first, "first", 1);
ASSERT_BUFFER_REFCOUNT (second, "second", 1);
ASSERT_BUFFER_REFCOUNT (third, "third", 1);
/* three frames submitted; two of them output as is, and 36 duplicated */
assert_videorate_stats (videorate, "third", 3, 38, 0, 36);
@ -481,23 +482,60 @@ GST_START_TEST (test_max_duplication_time)
/* ... and a copy is now stuck inside videorate */
ASSERT_BUFFER_REFCOUNT (fourth, "fourth", 1);
fail_unless_equals_int (g_list_length (buffers), 38);
/* should now have drained everything up to the 2s buffer above */
fail_unless_equals_int (g_list_length (buffers), 51);
ASSERT_BUFFER_REFCOUNT (first, "first", 1);
ASSERT_BUFFER_REFCOUNT (second, "second", 1);
assert_videorate_stats (videorate, "fourth", 4, 38, 0, 36);
ASSERT_BUFFER_REFCOUNT (third, "third", 1);
ASSERT_BUFFER_REFCOUNT (fourth, "fourth", 1);
assert_videorate_stats (videorate, "fourth", 4, 51, 0, 48);
/* verify last buffer */
outbuffer = g_list_last (buffers)->data;
fail_unless (GST_IS_BUFFER (outbuffer));
fail_unless_equals_uint64 (GST_BUFFER_TIMESTAMP (outbuffer),
GST_SECOND * 37 / 25);
fail_unless_equals_uint64 (GST_BUFFER_TIMESTAMP (outbuffer), 2 * GST_SECOND);
/* fifth buffer */
fifth = gst_buffer_new_and_alloc (4);
GST_BUFFER_TIMESTAMP (fifth) = 6 * GST_SECOND;
gst_buffer_memset (fifth, 0, 0, 4);
ASSERT_BUFFER_REFCOUNT (fifth, "fifth", 1);
gst_buffer_ref (fifth);
/* pushing gives away my reference ... */
fail_unless (gst_pad_push (mysrcpad, fifth) == GST_FLOW_OK);
/* ... and a copy is now stuck inside videorate */
ASSERT_BUFFER_REFCOUNT (third, "fifth", 1);
/* submitting a frame with 6 seconds triggers output of 12 more frames */
fail_unless_equals_int (g_list_length (buffers), 63);
ASSERT_BUFFER_REFCOUNT (first, "first", 1);
ASSERT_BUFFER_REFCOUNT (second, "second", 1);
ASSERT_BUFFER_REFCOUNT (third, "third", 1);
ASSERT_BUFFER_REFCOUNT (fourth, "fourth", 1);
ASSERT_BUFFER_REFCOUNT (fifth, "fifth", 1);
/* five frames submitted; two of them output as is, 63 and 59 duplicated */
assert_videorate_stats (videorate, "fifth", 5, 63, 0, 59);
/* push EOS to drain */
fail_unless (gst_pad_push_event (mysrcpad, gst_event_new_eos ()));
/* we should now have gotten one output for the last frame */
fail_unless_equals_int (g_list_length (buffers), 64);
ASSERT_BUFFER_REFCOUNT (first, "first", 1);
ASSERT_BUFFER_REFCOUNT (second, "second", 1);
ASSERT_BUFFER_REFCOUNT (third, "third", 1);
ASSERT_BUFFER_REFCOUNT (fourth, "fourth", 1);
ASSERT_BUFFER_REFCOUNT (fifth, "fifth", 1);
/* five frames submitted; two of them output as is, 64 and 60 duplicated */
assert_videorate_stats (videorate, "fifth", 5, 64, 0, 59);
/* cleanup */
gst_buffer_unref (first);
gst_buffer_unref (second);
gst_buffer_unref (third);
gst_buffer_unref (fourth);
gst_buffer_unref (fifth);
cleanup_videorate (videorate);
}