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videoaggregator: handle gap buffers properly

Browse source 
This simply implies not trying to "prepare" those buffers,
as mapping an empty buffer to a video frame does not make
much sense.

This also adds a simple test in compositor that performs
some trivial checking of the handling of gap events, the test
was not failing before, but an error was logged, this is
no longer the case.

Fixes #717
This commit is contained in:
Mathieu Duponchelle 2020-01-30 19:00:07 +01:00
parent 72cb0c0641
commit 54cc985810
2 changed files with 54 additions and 0 deletions
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7
gst-libs/gst/video/gstvideoaggregator.c
View file

@ -1622,6 +1622,13 @@ prepare_frames (GstElement * agg, GstPad * pad, gpointer user_data)
if (vpad->priv->buffer == NULL || !vaggpad_class->prepare_frame)
return TRUE;
/* GAP event, nothing to do */
if (vpad->priv->buffer &&
gst_buffer_get_size (vpad->priv->buffer) == 0 &&
GST_BUFFER_FLAG_IS_SET (vpad->priv->buffer, GST_BUFFER_FLAG_GAP)) {
return TRUE;
}
return vaggpad_class->prepare_frame (vpad, GST_VIDEO_AGGREGATOR_CAST (agg),
vpad->priv->buffer, &vpad->priv->prepared_frame);
}

47
tests/check/elements/compositor.c
View file

@ -31,6 +31,7 @@
#include <gst/check/gstcheck.h>
#include <gst/check/gstconsistencychecker.h>
#include <gst/check/gstharness.h>
#include <gst/video/gstvideometa.h>
#include <gst/base/gstbasesrc.h>
@ -2120,6 +2121,51 @@ GST_START_TEST (test_start_time_first_live_drop_3_unlinked_1)
GST_END_TEST;
GST_START_TEST (test_gap_events)
{
GstBuffer *buf;
GstElement *comp = gst_element_factory_make ("compositor", NULL);
GstHarness *h = gst_harness_new_with_element (comp, "sink_%u", "src");
GstMapInfo info;
g_object_set (comp, "background", 1, NULL);
gst_harness_set_src_caps_str (h,
"video/x-raw, format=RGBA, width=1, height=1, framerate=25/1");
gst_harness_play (h);
gst_harness_push_event (h, gst_event_new_gap (0, 40 * GST_MSECOND));
buf = gst_buffer_new_allocate (NULL, 4, NULL);
gst_buffer_map (buf, &info, GST_MAP_WRITE);
memset (info.data, 42, info.size);
info.data[3] = 255;
gst_buffer_unmap (buf, &info);
GST_BUFFER_PTS (buf) = 40 * GST_MSECOND;
GST_BUFFER_DURATION (buf) = 40 * GST_MSECOND;
gst_harness_push (h, buf);
buf = gst_harness_pull (h);
gst_buffer_map (buf, &info, GST_MAP_READ);
fail_unless (info.data[0] == 0);
gst_buffer_unmap (buf, &info);
gst_buffer_unref (buf);
buf = gst_harness_pull (h);
gst_buffer_map (buf, &info, GST_MAP_READ);
fail_unless (info.data[0] == 42);
gst_buffer_unmap (buf, &info);
gst_buffer_unref (buf);
gst_harness_teardown (h);
gst_object_unref (comp);
}
GST_END_TEST;
static Suite *
compositor_suite (void)
{
@ -2158,6 +2204,7 @@ compositor_suite (void)
tcase_add_test (tc_chain, test_start_time_first_live_drop_0);
tcase_add_test (tc_chain, test_start_time_first_live_drop_3);
tcase_add_test (tc_chain, test_start_time_first_live_drop_3_unlinked_1);
tcase_add_test (tc_chain, test_gap_events);
return s;
}