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qtdemux: Only set appsink sync property and check for async state changes

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By keeping async to TRUE, a deadlock is avoided where the appsink is
filled with data after a flushing seek but before its PAUSED->PLAYING
state change finishes. If that happens, the appsink is stuck, because
its internal condition variable waits for the appsink to have more room
for data. The basesink's preroll lock is held during this, and it also
tries to acquire that lock during the state change -> deadlock.
By keeping async to TRUE, this flood of data does not happen.

Also, setting the max-buffers property to 1 is unnecessary - the test
runner will anyway detect excess memory usage if it happens.

Other property adjustments turned out to just be redundant.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4200>
This commit is contained in:
Carlos Rafael Giani 2023-03-29 15:34:36 +02:00 committed by GStreamer Marge Bot
parent 0071c97128
commit 3fbcf5fcf3
1 changed files with 24 additions and 25 deletions
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49
subprojects/gst-plugins-good/tests/check/elements/qtdemux.c
View file

@ -1461,11 +1461,26 @@ finish:
gst_object_unref (GST_OBJECT (appsink_pad));
}
static void
switch_state_with_async_wait (GstElement * pipeline, GstState state)
{
GstStateChangeReturn state_ret;
state_ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
fail_unless (state_ret != GST_STATE_CHANGE_FAILURE);
if (state_ret == GST_STATE_CHANGE_ASYNC) {
GST_LOG ("waiting for pipeline to reach %s state",
gst_element_state_get_name (state));
state_ret = gst_element_get_state (pipeline, NULL, NULL, -1);
fail_unless_equals_int (state_ret, GST_STATE_CHANGE_SUCCESS);
}
}
static void
perform_gapless_test (GaplessTestInfo * info)
{
GstElement *source, *demux, *appsink, *pipeline;
GstStateChangeReturn state_ret;
guint frame_num;
pipeline = gst_pipeline_new (NULL);
@ -1488,19 +1503,9 @@ perform_gapless_test (GaplessTestInfo * info)
g_free (full_filename);
}
g_object_set (G_OBJECT (appsink), "async", FALSE, "sync", FALSE,
"max-buffers", 1, "enable-last-sample", FALSE, "processing-deadline",
G_MAXUINT64, NULL);
g_object_set (G_OBJECT (appsink), "sync", FALSE, NULL);
state_ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
fail_unless (state_ret != GST_STATE_CHANGE_FAILURE);
if (state_ret == GST_STATE_CHANGE_ASYNC) {
GST_LOG ("waiting for pipeline to reach PAUSED state");
state_ret = gst_element_get_state (pipeline, NULL, NULL, -1);
fail_unless_equals_int (state_ret, GST_STATE_CHANGE_SUCCESS);
}
switch_state_with_async_wait (pipeline, GST_STATE_PLAYING);
/* Verify all frames from the test signal. */
for (frame_num = 0; frame_num < info->num_aac_frames; ++frame_num)
@ -1535,11 +1540,9 @@ perform_gapless_test (GaplessTestInfo * info)
* with PTS 0, and all of those buffers except the last will have a
* duration of 0. */
{
fail_unless_equals_int (gst_element_set_state (pipeline, GST_STATE_PAUSED),
GST_STATE_CHANGE_SUCCESS);
switch_state_with_async_wait (pipeline, GST_STATE_PAUSED);
gst_element_seek_simple (pipeline, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH, 0);
fail_unless_equals_int (gst_element_set_state (pipeline, GST_STATE_PLAYING),
GST_STATE_CHANGE_SUCCESS);
switch_state_with_async_wait (pipeline, GST_STATE_PLAYING);
check_parsed_aac_frame (info, 0);
}
@ -1554,12 +1557,10 @@ perform_gapless_test (GaplessTestInfo * info)
gst_util_uint64_scale_int (info->num_samples_in_first_valid_frame,
GST_SECOND, info->sample_rate);
fail_unless_equals_int (gst_element_set_state (pipeline, GST_STATE_PAUSED),
GST_STATE_CHANGE_SUCCESS);
switch_state_with_async_wait (pipeline, GST_STATE_PAUSED);
gst_element_seek_simple (pipeline, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
position);
fail_unless_equals_int (gst_element_set_state (pipeline, GST_STATE_PLAYING),
GST_STATE_CHANGE_SUCCESS);
switch_state_with_async_wait (pipeline, GST_STATE_PLAYING);
check_parsed_aac_frame (info, info->first_frame_with_valid_samples + 1);
}
@ -1574,12 +1575,10 @@ perform_gapless_test (GaplessTestInfo * info)
info->num_samples_without_padding - info->num_samples_per_frame,
GST_SECOND, info->sample_rate);
fail_unless_equals_int (gst_element_set_state (pipeline, GST_STATE_PAUSED),
GST_STATE_CHANGE_SUCCESS);
switch_state_with_async_wait (pipeline, GST_STATE_PAUSED);
gst_element_seek_simple (pipeline, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
position);
fail_unless_equals_int (gst_element_set_state (pipeline, GST_STATE_PLAYING),
GST_STATE_CHANGE_SUCCESS);
switch_state_with_async_wait (pipeline, GST_STATE_PLAYING);
check_parsed_aac_frame (info, info->last_frame_with_valid_samples);
}