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gstreamer/tests/check/elements/rtpjitterbuffer.c
Havard Graff 0a81f71df5 tests/jitterbuffer: Major refactoring and cleanups 
* Changed PCMU->TEST for common macros
* Changed verify-functions (lost & rtx) into macros.
* Remove option to add marker-bit for test-buffers (not used anywhere)
* Add new push_test_buffer function that makes sure there are correlation
  between dts and the time on the clock. (classic test-mistake)
* Established a generic starting-point for tests with the
  construct_deterministic_initial_state function and use it where
  applicable, which removes lots of "boilerplate" everywhere.
* Add basic lost-event test
* Remove as much "magic constants" as possible.
* Remove 3 tests that no longer are testing anything that others don't,
  and was completely unmaintainable.
* Remove unnecessary use of the testclock
* Verify each test is testing what it actually says it does (and modify
  where it doesn't)

In general, make the tests much smaller, better, more maintainable and
readable.

https://bugzilla.gnome.org/show_bug.cgi?id=774409
2016-12-14 15:00:37 +02:00

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/* GStreamer
*
* Copyright (C) 2009 Nokia Corporation and its subsidary(-ies)
* contact: <stefan.kost@nokia.com>
* Copyright (C) 2012 Cisco Systems, Inc
* Authors: Kelley Rogers <kelro@cisco.com>
* Havard Graff <hgraff@cisco.com>
* Copyright (C) 2013-2016 Pexip AS
* Stian Selnes <stian@pexip>
* Havard Graff <havard@pexip>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <gst/check/gstcheck.h>
#include <gst/check/gsttestclock.h>
#include <gst/check/gstharness.h>
#include <gst/rtp/gstrtpbuffer.h>
/* For ease of programming we use globals to keep refs for our floating
* src and sink pads we create; otherwise we always have to do get_pad,
* get_peer, and then remove references in every test function */
static GstPad *mysrcpad, *mysinkpad;
/* we also have a list of src buffers */
static GList *inbuffers = NULL;
static gint num_dropped = 0;
#define RTP_CAPS_STRING \
"application/x-rtp, " \
"media = (string)audio, " \
"payload = (int) 0, " \
"clock-rate = (int) 8000, " \
"encoding-name = (string)PCMU"
#define RTP_FRAME_SIZE 20
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp")
);
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"clock-rate = (int) [ 1, 2147483647 ]")
);
static void
buffer_dropped (gpointer data, GstMiniObject * obj)
{
GST_DEBUG ("dropping buffer %p", obj);
num_dropped++;
}
static GstElement *
setup_jitterbuffer (gint num_buffers)
{
GstElement *jitterbuffer;
GstClock *clock;
GstBuffer *buffer;
GstCaps *caps;
/* a 20 sample audio block (2,5 ms) generated with
* gst-launch audiotestsrc wave=silence blocksize=40 num-buffers=3 !
* "audio/x-raw,channels=1,rate=8000" ! mulawenc ! rtppcmupay !
* fakesink dump=1
*/
guint8 in[] = {
/* first 4 bytes are rtp-header, next 4 bytes are timestamp */
0x80, 0x80, 0x1c, 0x24, 0x46, 0xcd, 0xb7, 0x11, 0x3c, 0x3a, 0x7c, 0x5b,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};
GstClockTime ts = G_GUINT64_CONSTANT (0);
GstClockTime tso = gst_util_uint64_scale (RTP_FRAME_SIZE, GST_SECOND, 8000);
/*guint latency = GST_TIME_AS_MSECONDS (num_buffers * tso); */
gint i;
GST_DEBUG ("setup_jitterbuffer");
jitterbuffer = gst_check_setup_element ("rtpjitterbuffer");
/* we need a clock here */
clock = gst_system_clock_obtain ();
gst_element_set_clock (jitterbuffer, clock);
gst_object_unref (clock);
/* setup latency */
/* latency would be 7 for 3 buffers here, default is 200
g_object_set (G_OBJECT (jitterbuffer), "latency", latency, NULL);
GST_INFO_OBJECT (jitterbuffer, "set latency to %u ms", latency);
*/
mysrcpad = gst_check_setup_src_pad (jitterbuffer, &srctemplate);
mysinkpad = gst_check_setup_sink_pad (jitterbuffer, &sinktemplate);
gst_pad_set_active (mysrcpad, TRUE);
gst_pad_set_active (mysinkpad, TRUE);
/* create n buffers */
caps = gst_caps_from_string (RTP_CAPS_STRING);
gst_check_setup_events (mysrcpad, jitterbuffer, caps, GST_FORMAT_TIME);
gst_caps_unref (caps);
for (i = 0; i < num_buffers; i++) {
buffer = gst_buffer_new_and_alloc (sizeof (in));
gst_buffer_fill (buffer, 0, in, sizeof (in));
GST_BUFFER_DTS (buffer) = ts;
GST_BUFFER_PTS (buffer) = ts;
GST_BUFFER_DURATION (buffer) = tso;
gst_mini_object_weak_ref (GST_MINI_OBJECT (buffer), buffer_dropped, NULL);
GST_DEBUG ("created buffer: %p", buffer);
if (!i)
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
inbuffers = g_list_append (inbuffers, buffer);
/* hackish way to update the rtp header */
in[1] = 0x00;
in[3]++; /* seqnumber */
in[7] += RTP_FRAME_SIZE; /* inc. timestamp with framesize */
ts += tso;
}
num_dropped = 0;
return jitterbuffer;
}
static GstStateChangeReturn
start_jitterbuffer (GstElement * jitterbuffer)
{
GstStateChangeReturn ret;
GstClockTime now;
GstClock *clock;
clock = gst_element_get_clock (jitterbuffer);
now = gst_clock_get_time (clock);
gst_object_unref (clock);
gst_element_set_base_time (jitterbuffer, now);
ret = gst_element_set_state (jitterbuffer, GST_STATE_PLAYING);
return ret;
}
static void
cleanup_jitterbuffer (GstElement * jitterbuffer)
{
GST_DEBUG ("cleanup_jitterbuffer");
g_list_foreach (buffers, (GFunc) gst_mini_object_unref, NULL);
g_list_free (buffers);
buffers = NULL;
g_list_free (inbuffers);
inbuffers = NULL;
gst_pad_set_active (mysrcpad, FALSE);
gst_pad_set_active (mysinkpad, FALSE);
gst_check_teardown_src_pad (jitterbuffer);
gst_check_teardown_sink_pad (jitterbuffer);
gst_check_teardown_element (jitterbuffer);
}
static void
check_jitterbuffer_results (GstElement * jitterbuffer, gint num_buffers)
{
GstBuffer *buffer;
GList *node;
GstClockTime ts = G_GUINT64_CONSTANT (0);
GstClockTime tso = gst_util_uint64_scale (RTP_FRAME_SIZE, GST_SECOND, 8000);
GstMapInfo map;
guint16 prev_sn = 0, cur_sn;
guint32 prev_ts = 0, cur_ts;
/* sleep for twice the latency */
g_usleep (400 * 1000);
GST_INFO ("of %d buffer %d/%d received/dropped", num_buffers,
g_list_length (buffers), num_dropped);
/* if this fails, not all buffers have been processed */
fail_unless_equals_int ((g_list_length (buffers) + num_dropped), num_buffers);
/* check the buffer list */
fail_unless_equals_int (g_list_length (buffers), num_buffers);
for (node = buffers; node; node = g_list_next (node)) {
fail_if ((buffer = (GstBuffer *) node->data) == NULL);
fail_if (GST_BUFFER_PTS (buffer) != ts);
fail_if (GST_BUFFER_DTS (buffer) != ts);
gst_buffer_map (buffer, &map, GST_MAP_READ);
cur_sn = ((guint16) map.data[2] << 8) | map.data[3];
cur_ts = ((guint32) map.data[4] << 24) | ((guint32) map.data[5] << 16) |
((guint32) map.data[6] << 8) | map.data[7];
gst_buffer_unmap (buffer, &map);
if (node != buffers) {
fail_unless (cur_sn > prev_sn);
fail_unless (cur_ts > prev_ts);
prev_sn = cur_sn;
prev_ts = cur_ts;
}
ts += tso;
}
}
GST_START_TEST (test_push_forward_seq)
{
GstElement *jitterbuffer;
const guint num_buffers = 3;
GstBuffer *buffer;
GList *node;
jitterbuffer = setup_jitterbuffer (num_buffers);
fail_unless (start_jitterbuffer (jitterbuffer)
== GST_STATE_CHANGE_SUCCESS, "could not set to playing");
/* push buffers: 0,1,2, */
for (node = inbuffers; node; node = g_list_next (node)) {
buffer = (GstBuffer *) node->data;
fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
}
/* check the buffer list */
check_jitterbuffer_results (jitterbuffer, num_buffers);
/* cleanup */
cleanup_jitterbuffer (jitterbuffer);
}
GST_END_TEST;
GST_START_TEST (test_push_backward_seq)
{
GstElement *jitterbuffer;
const guint num_buffers = 4;
GstBuffer *buffer;
GList *node;
jitterbuffer = setup_jitterbuffer (num_buffers);
fail_unless (start_jitterbuffer (jitterbuffer)
== GST_STATE_CHANGE_SUCCESS, "could not set to playing");
/* push buffers: 0,3,2,1 */
buffer = (GstBuffer *) inbuffers->data;
fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
for (node = g_list_last (inbuffers); node != inbuffers;
node = g_list_previous (node)) {
buffer = (GstBuffer *) node->data;
fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
}
/* check the buffer list */
check_jitterbuffer_results (jitterbuffer, num_buffers);
/* cleanup */
cleanup_jitterbuffer (jitterbuffer);
}
GST_END_TEST;
GST_START_TEST (test_push_unordered)
{
GstElement *jitterbuffer;
const guint num_buffers = 4;
GstBuffer *buffer;
jitterbuffer = setup_jitterbuffer (num_buffers);
fail_unless (start_jitterbuffer (jitterbuffer)
== GST_STATE_CHANGE_SUCCESS, "could not set to playing");
/* push buffers; 0,2,1,3 */
buffer = (GstBuffer *) inbuffers->data;
fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
buffer = g_list_nth_data (inbuffers, 2);
fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
buffer = g_list_nth_data (inbuffers, 1);
fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
buffer = g_list_nth_data (inbuffers, 3);
fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
/* check the buffer list */
check_jitterbuffer_results (jitterbuffer, num_buffers);
/* cleanup */
cleanup_jitterbuffer (jitterbuffer);
}
GST_END_TEST;
GST_START_TEST (test_basetime)
{
GstElement *jitterbuffer;
const guint num_buffers = 3;
GstBuffer *buffer;
GList *node;
GstClockTime tso = gst_util_uint64_scale (RTP_FRAME_SIZE, GST_SECOND, 8000);
jitterbuffer = setup_jitterbuffer (num_buffers);
fail_unless (start_jitterbuffer (jitterbuffer)
== GST_STATE_CHANGE_SUCCESS, "could not set to playing");
/* push buffers: 2,1,0 */
for (node = g_list_last (inbuffers); node; node = g_list_previous (node)) {
buffer = (GstBuffer *) node->data;
fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
}
/* sleep for twice the latency */
g_usleep (400 * 1000);
/* if this fails, not all buffers have been processed */
fail_unless_equals_int ((g_list_length (buffers) + num_dropped), num_buffers);
buffer = (GstBuffer *) buffers->data;
fail_unless (GST_BUFFER_DTS (buffer) != (num_buffers * tso));
fail_unless (GST_BUFFER_PTS (buffer) != (num_buffers * tso));
/* cleanup */
cleanup_jitterbuffer (jitterbuffer);
}
GST_END_TEST;
static GstCaps *
request_pt_map (GstElement * jitterbuffer, guint pt)
{
fail_unless (pt == 0);
return gst_caps_from_string (RTP_CAPS_STRING);
}
GST_START_TEST (test_clear_pt_map)
{
GstElement *jitterbuffer;
const guint num_buffers = 10;
gint i;
GstBuffer *buffer;
GList *node;
jitterbuffer = setup_jitterbuffer (num_buffers);
fail_unless (start_jitterbuffer (jitterbuffer)
== GST_STATE_CHANGE_SUCCESS, "could not set to playing");
g_signal_connect (jitterbuffer, "request-pt-map", (GCallback)
request_pt_map, NULL);
/* push buffers: 0,1,2, */
for (node = inbuffers, i = 0; node && i < 3; node = g_list_next (node), i++) {
buffer = (GstBuffer *) node->data;
fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
}
g_usleep (400 * 1000);
g_signal_emit_by_name (jitterbuffer, "clear-pt-map", NULL);
for (; node && i < 10; node = g_list_next (node), i++) {
buffer = (GstBuffer *) node->data;
fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
}
/* check the buffer list */
check_jitterbuffer_results (jitterbuffer, num_buffers);
/* cleanup */
cleanup_jitterbuffer (jitterbuffer);
}
GST_END_TEST;
#define TEST_BUF_CLOCK_RATE 8000
#define TEST_BUF_PT 0
#define TEST_BUF_SSRC 0x01BADBAD
#define TEST_BUF_MS 20
#define TEST_BUF_DURATION (TEST_BUF_MS * GST_MSECOND)
#define TEST_BUF_SIZE (64000 * TEST_BUF_MS / 1000)
#define TEST_RTP_TS_DURATION (TEST_BUF_CLOCK_RATE * TEST_BUF_MS / 1000)
static GstCaps *
generate_caps (void)
{
return gst_caps_new_simple ("application/x-rtp",
"media", G_TYPE_STRING, "audio",
"clock-rate", G_TYPE_INT, TEST_BUF_CLOCK_RATE,
"encoding-name", G_TYPE_STRING, "TEST",
"payload", G_TYPE_INT, TEST_BUF_PT,
"ssrc", G_TYPE_UINT, TEST_BUF_SSRC, NULL);
}
static GstBuffer *
generate_test_buffer_full (GstClockTime dts, guint seq_num, guint32 rtp_ts)
{
GstBuffer *buf;
guint8 *payload;
guint i;
GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
buf = gst_rtp_buffer_new_allocate (TEST_BUF_SIZE, 0, 0);
GST_BUFFER_DTS (buf) = dts;
gst_rtp_buffer_map (buf, GST_MAP_READWRITE, &rtp);
gst_rtp_buffer_set_payload_type (&rtp, TEST_BUF_PT);
gst_rtp_buffer_set_seq (&rtp, seq_num);
gst_rtp_buffer_set_timestamp (&rtp, rtp_ts);
gst_rtp_buffer_set_ssrc (&rtp, TEST_BUF_SSRC);
payload = gst_rtp_buffer_get_payload (&rtp);
for (i = 0; i < TEST_BUF_SIZE; i++)
payload[i] = 0xff;
gst_rtp_buffer_unmap (&rtp);
return buf;
}
static GstBuffer *
generate_test_buffer (guint seq_num)
{
return generate_test_buffer_full (seq_num * TEST_BUF_DURATION,
seq_num, seq_num * TEST_RTP_TS_DURATION);
}
static GstBuffer *
generate_test_buffer_rtx (GstClockTime dts, guint seq_num)
{
GstBuffer *buffer = generate_test_buffer_full (dts, seq_num,
seq_num * TEST_RTP_TS_DURATION);
GST_BUFFER_FLAG_SET (buffer, GST_RTP_BUFFER_FLAG_RETRANSMISSION);
return buffer;
}
static void
push_test_buffer (GstHarness * h, guint seq_num)
{
gst_harness_set_time (h, seq_num * TEST_BUF_DURATION);
fail_unless_equals_int (GST_FLOW_OK, gst_harness_push (h,
generate_test_buffer (seq_num)));
}
static gint
get_rtp_seq_num (GstBuffer * buf)
{
GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
gint seq;
gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp);
seq = gst_rtp_buffer_get_seq (&rtp);
gst_rtp_buffer_unmap (&rtp);
return seq;
}
#define verify_lost_event(h, exp_seq, exp_ts, exp_dur) \
G_STMT_START { \
GstEvent *_event; \
const GstStructure *_s; \
const GValue *_value; \
guint _seq; \
GstClockTime _ts; \
GstClockTime _dur; \
_event = gst_harness_pull_event (h); \
fail_unless (_event != NULL); \
_s = gst_event_get_structure (_event); \
fail_unless (_s != NULL); \
fail_unless (gst_structure_get_uint (_s, "seqnum", &_seq)); \
_value = gst_structure_get_value (_s, "timestamp"); \
fail_unless (_value && G_VALUE_HOLDS_UINT64 (_value)); \
_ts = g_value_get_uint64 (_value); \
_value = gst_structure_get_value (_s, "duration"); \
fail_unless (_value && G_VALUE_HOLDS_UINT64 (_value)); \
_dur = g_value_get_uint64 (_value); \
fail_unless_equals_int ((guint16)(exp_seq), _seq); \
fail_unless_equals_uint64 (exp_ts, _ts); \
fail_unless_equals_uint64 (exp_dur, _dur); \
gst_event_unref (_event); \
} G_STMT_END
#define verify_rtx_event(h, exp_seq, exp_ts, exp_delay, exp_spacing) \
G_STMT_START { \
GstEvent *_event; \
const GstStructure *_s; \
const GValue *_value; \
guint _seq; \
GstClockTime _ts; \
guint _delay; \
GstClockTime _spacing; \
_event = gst_harness_pull_upstream_event (h); \
fail_unless (_event != NULL); \
_s = gst_event_get_structure (_event); \
fail_unless (_s != NULL); \
fail_unless (gst_structure_get_uint (_s, "seqnum", &_seq)); \
_value = gst_structure_get_value (_s, "running-time"); \
fail_unless (_value && G_VALUE_HOLDS_UINT64 (_value)); \
_ts = g_value_get_uint64 (_value); \
fail_unless (gst_structure_get_uint (_s, "delay", &_delay)); \
_value = gst_structure_get_value (_s, "packet-spacing"); \
fail_unless (_value && G_VALUE_HOLDS_UINT64 (_value)); \
_spacing = g_value_get_uint64 (_value); \
fail_unless_equals_int ((guint16)(exp_seq), _seq); \
fail_unless_equals_uint64 (exp_ts, _ts); \
fail_unless_equals_int (exp_delay, _delay); \
fail_unless_equals_uint64 (exp_spacing, _spacing); \
gst_event_unref (_event); \
} G_STMT_END
static gboolean
verify_jb_stats (GstElement * jb, GstStructure * expected)
{
gboolean ret;
GstStructure *actual;
g_object_get (jb, "stats", &actual, NULL);
ret = gst_structure_is_subset (actual, expected);
if (!ret) {
gchar *e_str = gst_structure_to_string (expected);
gchar *a_str = gst_structure_to_string (actual);
fail_unless (ret, "%s is not a subset of %s", e_str, a_str);
g_free (e_str);
g_free (a_str);
}
gst_structure_free (expected);
gst_structure_free (actual);
return ret;
}
static guint
construct_deterministic_initial_state (GstHarness * h, gint latency_ms)
{
guint next_seqnum = latency_ms / TEST_BUF_MS + 1;
guint seqnum;
g_assert (latency_ms % TEST_BUF_MS == 0);
gst_harness_set_src_caps (h, generate_caps ());
g_object_set (h->element, "latency", latency_ms, NULL);
/* When the first packet arrives in the jitterbuffer, it will create a
* timeout for this packet equal to the latency of the jitterbuffer.
* This is known as DEADLINE internally, and is meant to allow the stream
* to buffer a bit before starting to push it out, to get some ideas about
* the nature of the stream. (packetspacing, jitter etc.)
*
* When writing tests using the test-clock, it it hence important to know
* that by simply advancing the clock to this timeout, you are basically
* describing a stream that had one initial packet, and then nothing at all
* for the duration of the latency (100ms in this test), which is not a very
* usual scenario.
*
* Instead, a pattern used throughout this test-suite, is to keep the buffers
* arriving at their optimal time, until the DEADLINE is reached, and that
* then becomes the "starting-point" for the test, because at this time
* there should now be no waiting timers (unless using rtx) and we have
* a "clean" state to craft the test from.
*/
/* Packet 0 arrives at time 0ms, Packet 5 arrives at time 100ms */
for (seqnum = 0; seqnum < next_seqnum; seqnum++) {
push_test_buffer (h, seqnum);
gst_harness_wait_for_clock_id_waits (h, 1, 60);
}
/* We release the DEADLINE timer for packet 0, verify the time is indeed
* @latency_ms (100ms) and pull out all the buffers that have been released,
* and verify their PTS and sequence numbers.
*/
gst_harness_crank_single_clock_wait (h);
fail_unless_equals_int64 (latency_ms * GST_MSECOND,
gst_clock_get_time (GST_ELEMENT_CLOCK (h->element)));
for (seqnum = 0; seqnum < next_seqnum; seqnum++) {
GstBuffer *buf = gst_harness_pull (h);
fail_unless_equals_uint64 (seqnum * TEST_BUF_DURATION,
GST_BUFFER_PTS (buf));
fail_unless_equals_int (seqnum, get_rtp_seq_num (buf));
gst_buffer_unref (buf);
}
/* drop GstEventStreamStart & GstEventCaps & GstEventSegment */
for (gint i = 0; i < 3; i++)
gst_event_unref (gst_harness_pull_event (h));
/* drop reconfigure event */
gst_event_unref (gst_harness_pull_upstream_event (h));
/* Verify that at this point our queues are empty */
fail_unless_equals_int (0, gst_harness_buffers_in_queue (h));
fail_unless_equals_int (0, gst_harness_events_in_queue (h));
return next_seqnum;
}
GST_START_TEST (test_lost_event)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
GstBuffer *buf;
gint latency_ms = 100;
guint next_seqnum;
guint missing_seqnum;
g_object_set (h->element, "do-lost", TRUE, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* We will now create a gap in the stream, by skipping one sequence-number,
* and push the following packet.
*/
missing_seqnum = next_seqnum;
next_seqnum += 1;
push_test_buffer (h, next_seqnum);
/* This packet (@next_seqnum) will now be held back, awaiting the missing one,
* verify that this is the case:
*/
fail_unless_equals_int (0, gst_harness_buffers_in_queue (h));
fail_unless_equals_int (0, gst_harness_events_in_queue (h));
/* The lost-timeout for the missing packet will now be its pts + latency, so
* now we will simply crank the clock to advance to this point in time, and
* check that we get a lost-event, as well as the last packet we pushed in.
*/
gst_harness_crank_single_clock_wait (h);
verify_lost_event (h, missing_seqnum,
missing_seqnum * TEST_BUF_DURATION, TEST_BUF_DURATION);
buf = gst_harness_pull (h);
fail_unless_equals_uint64 (next_seqnum * TEST_BUF_DURATION,
GST_BUFFER_PTS (buf));
fail_unless_equals_int (next_seqnum, get_rtp_seq_num (buf));
gst_buffer_unref (buf);
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum,
"num-lost", G_TYPE_UINT64, (guint64) 1, NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_only_one_lost_event_on_large_gaps)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
GstTestClock *testclock;
GstBuffer *out_buf;
guint next_seqnum;
gint latency_ms = 200;
gint num_lost_events = latency_ms / TEST_BUF_MS;
gint i;
testclock = gst_harness_get_testclock (h);
/* Need to set max-misorder-time and max-dropout-time to 0 so the
* jitterbuffer does not base them on packet rate calculations.
* If it does, out gap is big enough to be considered a new stream and
* we wait for a few consecutive packets just to be sure
*/
g_object_set (h->element, "do-lost", TRUE,
"max-misorder-time", 0, "max-dropout-time", 0, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* move time ahead to just before 10 seconds */
gst_harness_set_time (h, 10 * GST_SECOND - 1);
/* check that we have no pending waits */
fail_unless_equals_int (0, gst_test_clock_peek_id_count (testclock));
/* a buffer now arrives perfectly on time */
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h, generate_test_buffer (500)));
/* release the wait, advancing the clock to 10 sec */
fail_unless (gst_harness_crank_single_clock_wait (h));
/* we should now receive a packet-lost-event for buffers 11 through 489 ... */
verify_lost_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, TEST_BUF_DURATION * (490 - next_seqnum));
/* ... as well as 490 (since at 10 sec 490 is too late) */
verify_lost_event (h, 490, 490 * TEST_BUF_DURATION, TEST_BUF_DURATION);
/* we get as many lost events as the the number of *
* buffers the jitterbuffer is able to wait for */
for (i = 1; i < num_lost_events; i++) {
fail_unless (gst_harness_crank_single_clock_wait (h));
verify_lost_event (h, 490 + i, (490 + i) * TEST_BUF_DURATION,
TEST_BUF_DURATION);
}
/* and then the buffer is released */
out_buf = gst_harness_pull (h);
fail_unless (GST_BUFFER_FLAG_IS_SET (out_buf, GST_BUFFER_FLAG_DISCONT));
fail_unless_equals_int (500, get_rtp_seq_num (out_buf));
fail_unless_equals_uint64 (10 * GST_SECOND, GST_BUFFER_DTS (out_buf));
fail_unless_equals_uint64 (10 * GST_SECOND, GST_BUFFER_PTS (out_buf));
gst_buffer_unref (out_buf);
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-lost", G_TYPE_UINT64, (guint64) 489, NULL)));
gst_object_unref (testclock);
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_two_lost_one_arrives_in_time)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
GstTestClock *testclock;
GstClockID id;
GstBuffer *buf;
gint latency_ms = 100;
guint next_seqnum;
guint first_missing;
guint second_missing;
guint current_arrived;
testclock = gst_harness_get_testclock (h);
g_object_set (h->element, "do-lost", TRUE, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* hop over 2 packets and make another one (gap of 2) */
first_missing = next_seqnum;
second_missing = next_seqnum + 1;
current_arrived = next_seqnum + 2;
push_test_buffer (h, current_arrived);
/* verify that the jitterbuffer now wait for the latest moment it can push the
* @first_missing packet out.
*/
gst_test_clock_wait_for_next_pending_id (testclock, &id);
fail_unless_equals_uint64 (first_missing * TEST_BUF_DURATION +
latency_ms * GST_MSECOND, gst_clock_id_get_time (id));
gst_clock_id_unref (id);
/* let the time expire... */
fail_unless (gst_harness_crank_single_clock_wait (h));
/* we should now receive a packet-lost-event */
verify_lost_event (h, first_missing,
first_missing * TEST_BUF_DURATION, TEST_BUF_DURATION);
/* @second_missing now arrives just in time */
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h, generate_test_buffer (second_missing)));
/* verify that @second_missing made it through! */
buf = gst_harness_pull (h);
fail_unless (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT));
fail_unless_equals_int (second_missing, get_rtp_seq_num (buf));
gst_buffer_unref (buf);
/* and see that @current_arrived now also is pushed */
buf = gst_harness_pull (h);
fail_unless (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT));
fail_unless_equals_int (current_arrived, get_rtp_seq_num (buf));
gst_buffer_unref (buf);
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum + 2,
"num-lost", G_TYPE_UINT64, (guint64) 1, NULL)));
gst_object_unref (testclock);
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_late_packets_still_makes_lost_events)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
GstBuffer *out_buf;
gint latency_ms = 100;
guint next_seqnum;
guint seqnum;
GstClockTime now;
g_object_set (h->element, "do-lost", TRUE, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* jump 10 seconds forward in time */
now = 10 * GST_SECOND;
gst_harness_set_time (h, now);
/* push a packet with a gap of 2, that now is very late */
seqnum = next_seqnum + 2;
fail_unless_equals_int (GST_FLOW_OK, gst_harness_push (h,
generate_test_buffer_full (now,
seqnum, seqnum * TEST_RTP_TS_DURATION)));
/* we should now receive packet-lost-events for the gap
* FIXME: The timeout and duration here are a bit crap...
*/
verify_lost_event (h, next_seqnum, 3400 * GST_MSECOND, 6500 * GST_MSECOND);
verify_lost_event (h, next_seqnum + 1,
9900 * GST_MSECOND, 3300 * GST_MSECOND);
/* verify that packet @seqnum made it through! */
out_buf = gst_harness_pull (h);
fail_unless (GST_BUFFER_FLAG_IS_SET (out_buf, GST_BUFFER_FLAG_DISCONT));
fail_unless_equals_int (seqnum, get_rtp_seq_num (out_buf));
gst_buffer_unref (out_buf);
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum + 1,
"num-lost", G_TYPE_UINT64, (guint64) 2, NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_num_late_when_considered_lost_arrives)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gboolean do_lost = __i__ != 0;
gint latency_ms = 100;
guint next_seqnum;
g_object_set (h->element, "do-lost", do_lost, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* gap of 1 */
push_test_buffer (h, next_seqnum + 1);
/* crank to trigger lost-event */
gst_harness_crank_single_clock_wait (h);
if (do_lost) {
/* we should now receive packet-lost-events for the missing packet */
verify_lost_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, TEST_BUF_DURATION);
}
/* pull out the pushed packet */
gst_buffer_unref (gst_harness_pull (h));
/* we have one lost packet in the stats */
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum + 1,
"num-lost", G_TYPE_UINT64, (guint64) 1,
"num-late", G_TYPE_UINT64, (guint64) 0, NULL)));
/* the missing packet now arrives (too late) */
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h, generate_test_buffer (next_seqnum)));
/* and this increments num-late */
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum + 1,
"num-lost", G_TYPE_UINT64, (guint64) 1,
"num-late", G_TYPE_UINT64, (guint64) 1, NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_lost_event_uses_pts)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
GstClockTime now;
gint latency_ms = 100;
guint next_seqnum;
guint lost_seqnum;
g_object_set (h->element, "do-lost", TRUE, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* hop over 1 packets and make another one (gap of 1), but due to
network delays, this packets is also grossly late */
lost_seqnum = next_seqnum;
next_seqnum += 1;
/* advance the clock to the latest time packet @next_seqnum could arrive */
now = next_seqnum * TEST_BUF_DURATION + latency_ms * GST_MSECOND;
gst_harness_set_time (h, now);
gst_harness_push (h, generate_test_buffer_full (now, next_seqnum,
next_seqnum * TEST_RTP_TS_DURATION));
/* we should now have received a packet-lost-event for buffer 3 */
verify_lost_event (h, lost_seqnum,
lost_seqnum * TEST_BUF_DURATION, TEST_BUF_DURATION);
/* and pull out packet 4 */
gst_buffer_unref (gst_harness_pull (h));
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum,
"num-lost", G_TYPE_UINT64, (guint64) 1, NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_lost_event_with_backwards_rtptime)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 40;
g_object_set (h->element, "do-lost", TRUE, NULL);
construct_deterministic_initial_state (h, latency_ms);
/*
* For video using B-frames, an expected sequence
* could be like this:
* (I = I-frame, P = P-frame, B = B-frame)
* ___ ___ ___ ___ ___
* ... | 3 | | 4 | | 5 | | 6 | | 7 |
* ––– ––– ––– ––– –––
* rtptime: 3(I) 5(P) 5(P) 4(B) 6(P)
* arrival(dts): 3 5 5 5 6
*
* Notice here that packet 6 (the B frame) make
* the rtptime go backwards.
*
* But we get this:
* ___ ___ _ _ ___ ___
* ... | 3 | | 4 | | | | 6 | | 7 |
* ––– ––– - - ––– –––
* rtptime: 3(I) 5(P) 4(B) 6(P)
* arrival(dts): 3 5 5 6
*
*/
/* seqnum 3 */
push_test_buffer (h, 3);
gst_buffer_unref (gst_harness_pull (h));
/* seqnum 4, arriving at time 5 with rtptime 5 */
gst_harness_push (h,
generate_test_buffer_full (5 * TEST_BUF_DURATION,
4, 5 * TEST_RTP_TS_DURATION));
gst_buffer_unref (gst_harness_pull (h));
/* seqnum 6, arriving at time 5 with rtptime 4,
making a gap for missing seqnum 5 */
gst_harness_push (h,
generate_test_buffer_full (5 * TEST_BUF_DURATION,
6, 4 * TEST_RTP_TS_DURATION));
/* seqnum 7, arriving at time 6 with rtptime 6 */
gst_harness_push (h,
generate_test_buffer_full (6 * TEST_BUF_DURATION,
7, 6 * TEST_RTP_TS_DURATION));
/* we should now have received a packet-lost-event for seqnum 5,
with time 5 and 0 duration */
gst_harness_crank_single_clock_wait (h);
verify_lost_event (h, 5, 5 * TEST_BUF_DURATION, 0);
/* and pull out 6 and 7 */
gst_buffer_unref (gst_harness_pull (h));
gst_buffer_unref (gst_harness_pull (h));
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) 7,
"num-lost", G_TYPE_UINT64, (guint64) 1, NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_all_packets_are_timestamped_zero)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
GstBuffer *out_buf;
gint jb_latency_ms = 100;
gint i, b;
gst_harness_set_src_caps (h, generate_caps ());
g_object_set (h->element, "do-lost", TRUE, "latency", jb_latency_ms, NULL);
/* advance the clock with 10 seconds */
gst_harness_set_time (h, 10 * GST_SECOND);
/* push the first buffer through */
gst_buffer_unref (gst_harness_push_and_pull (h, generate_test_buffer (0)));
/* push some buffers in, all timestamped 0 */
for (b = 1; b < 3; b++) {
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h,
generate_test_buffer_full (0 * GST_MSECOND, b, 0)));
/* check for the buffer coming out that was pushed in */
out_buf = gst_harness_pull (h);
fail_unless_equals_uint64 (0, GST_BUFFER_DTS (out_buf));
fail_unless_equals_uint64 (0, GST_BUFFER_PTS (out_buf));
gst_buffer_unref (out_buf);
}
/* hop over 2 packets and make another one (gap of 2) */
b = 5;
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h, generate_test_buffer_full (0 * GST_MSECOND, b, 0)));
/* drop GstEventStreamStart & GstEventCaps & GstEventSegment */
for (i = 0; i < 3; i++)
gst_event_unref (gst_harness_pull_event (h));
/* we should now receive packet-lost-events for buffer 3 and 4 */
verify_lost_event (h, 3, 0, 0);
verify_lost_event (h, 4, 0, 0);
/* verify that buffer 5 made it through! */
out_buf = gst_harness_pull (h);
fail_unless (GST_BUFFER_FLAG_IS_SET (out_buf, GST_BUFFER_FLAG_DISCONT));
fail_unless_equals_int (5, get_rtp_seq_num (out_buf));
gst_buffer_unref (out_buf);
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) 4,
"num-lost", G_TYPE_UINT64, (guint64) 2, NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_reorder_of_non_equidistant_packets)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
GstTestClock *testclock;
gint latency_ms = 5;
GstClockID pending_id;
GstClockTime time;
gint seq, frame;
gint num_init_frames = 1;
const GstClockTime frame_dur = TEST_BUF_DURATION;
const guint32 frame_rtp_ts_dur = TEST_RTP_TS_DURATION;
gst_harness_set_src_caps (h, generate_caps ());
testclock = gst_harness_get_testclock (h);
g_object_set (h->element, "do-lost", TRUE, "latency", latency_ms, NULL);
for (frame = 0, seq = 0; frame < num_init_frames; frame++, seq += 2) {
/* Push a couple of packets with identical timestamp, typical for a video
* stream where one frame generates multiple packets. */
gst_harness_set_time (h, frame * frame_dur);
gst_harness_push (h, generate_test_buffer_full (frame * frame_dur,
seq, frame * frame_rtp_ts_dur));
gst_harness_push (h, generate_test_buffer_full (frame * frame_dur,
seq + 1, frame * frame_rtp_ts_dur));
if (frame == 0)
/* deadline for buffer 0 expires */
gst_harness_crank_single_clock_wait (h);
gst_buffer_unref (gst_harness_pull (h));
gst_buffer_unref (gst_harness_pull (h));
}
/* Finally push the last frame reordered */
gst_harness_set_time (h, frame * frame_dur);
gst_harness_push (h, generate_test_buffer_full (frame * frame_dur,
seq + 1, frame * frame_rtp_ts_dur));
/* Check the scheduled lost timer. The expected arrival of this packet
* should be assumed to be the same as the last packet received since we
* don't know wether the missing packet belonged to this or previous
* frame. */
gst_test_clock_wait_for_next_pending_id (testclock, &pending_id);
time = gst_clock_id_get_time (pending_id);
fail_unless_equals_int64 (time, frame * frame_dur + latency_ms * GST_MSECOND);
gst_clock_id_unref (pending_id);
/* And then missing packet arrives just in time */
gst_harness_set_time (h, time - 1);
gst_harness_push (h, generate_test_buffer_full (time - 1, seq,
frame * frame_rtp_ts_dur));
gst_buffer_unref (gst_harness_pull (h));
gst_buffer_unref (gst_harness_pull (h));
gst_object_unref (testclock);
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_loss_equidistant_spacing_with_parameter_packets)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 5;
gint seq, frame;
gint num_init_frames = 10;
gint i;
gst_harness_set_src_caps (h, generate_caps ());
g_object_set (h->element, "do-lost", TRUE, "latency", latency_ms, NULL);
/* drop stream-start, caps, segment */
for (i = 0; i < 3; i++)
gst_event_unref (gst_harness_pull_event (h));
for (frame = 0, seq = 0; frame < num_init_frames; frame++, seq++) {
gst_harness_set_time (h, frame * TEST_BUF_DURATION);
gst_harness_push (h, generate_test_buffer_full (frame * TEST_BUF_DURATION,
seq, frame * TEST_RTP_TS_DURATION));
if (frame == 0)
/* deadline for buffer 0 expires */
gst_harness_crank_single_clock_wait (h);
gst_buffer_unref (gst_harness_pull (h));
}
/* Push three packets with same rtptime, simulating parameter packets +
* frame. This should not disable equidistant mode as it is common for
* certain audio codecs. */
for (i = 0; i < 3; i++) {
gst_harness_set_time (h, frame * TEST_BUF_DURATION);
gst_harness_push (h, generate_test_buffer_full (frame * TEST_BUF_DURATION,
seq++, frame * TEST_RTP_TS_DURATION));
gst_buffer_unref (gst_harness_pull (h));
}
frame++;
/* Finally push the last packet introducing a gap */
gst_harness_set_time (h, frame * TEST_BUF_DURATION);
gst_harness_push (h, generate_test_buffer_full (frame * TEST_BUF_DURATION,
seq + 1, frame * TEST_RTP_TS_DURATION));
/* Check that the lost event has been generated assuming equidistant
* spacing. */
verify_lost_event (h, seq,
frame * TEST_BUF_DURATION - TEST_BUF_DURATION / 2, TEST_BUF_DURATION / 2);
gst_buffer_unref (gst_harness_pull (h));
gst_harness_teardown (h);
}
GST_END_TEST;
static void
gst_test_clock_set_time_and_process (GstTestClock * testclock,
GstClockTime time)
{
GstClockID id, tid;
gst_test_clock_wait_for_next_pending_id (testclock, &id);
gst_test_clock_set_time (testclock, time);
tid = gst_test_clock_process_next_clock_id (testclock);
g_assert (tid == id);
gst_clock_id_unref (tid);
gst_clock_id_unref (id);
}
GST_START_TEST (test_rtx_expected_next)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 200;
guint next_seqnum;
GstClockTime timeout;
gint rtx_delay_ms;
const GstClockTime rtx_retry_timeout_ms = 40;
g_object_set (h->element, "do-lost", TRUE, NULL);
g_object_set (h->element, "do-retransmission", TRUE, NULL);
g_object_set (h->element, "rtx-retry-period", 120, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* At this point there is already existing a rtx-timer for @next_seqnum,
* that will have a timeout of the expected arrival-time for that seqnum,
* and a delay equal to 2*jitter==0 and 0.5*packet_spacing==10ms */
timeout = next_seqnum * TEST_BUF_DURATION;
rtx_delay_ms = 0.5 * TEST_BUF_MS;
/* We crank the clock to time-out the next scheduled timer */
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, next_seqnum, timeout, rtx_delay_ms, TEST_BUF_DURATION);
/* now we wait for the next timeout, all following timeouts 40ms in the
* future because this is rtx-retry-timeout */
rtx_delay_ms += rtx_retry_timeout_ms;
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, next_seqnum, timeout, rtx_delay_ms, TEST_BUF_DURATION);
/* And a third time... */
rtx_delay_ms += rtx_retry_timeout_ms;
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, next_seqnum, timeout, rtx_delay_ms, TEST_BUF_DURATION);
/* we should now receive a packet-lost-event for packet @next_seqnum */
gst_harness_crank_single_clock_wait (h);
verify_lost_event (h, next_seqnum, timeout, TEST_BUF_DURATION);
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_rtx_two_missing)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 200;
guint next_seqnum;
GstClockTime last_rtx_request, now;
gint rtx_delay_ms = 0.5 * TEST_BUF_MS;
g_object_set (h->element, "do-retransmission", TRUE, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
fail_unless_equals_int (11, next_seqnum);
/*
* The expected sequence of buffers is this:
* ____ ____ ____ ____
* ... | 10 | | 11 | | 12 | | 13 |
* –––– –––– –––– ––––
* 200ms 220ms 240ms 260ms
*
* But instead we get this:
* ____ _ _ _ _ ____
* ... | 10 | | | | | | 13 |
* –––– - - - - ––––
* 200ms 260ms
*
* Now it is important to note that the next thing that happens is that
* the RTX timeout for packet 11 will happen at time 230ms, so we crank
* the timer thread to advance the time to this:
*/
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, 11, 11 * TEST_BUF_DURATION,
rtx_delay_ms, TEST_BUF_DURATION);
last_rtx_request = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int64 (last_rtx_request,
11 * TEST_BUF_DURATION + rtx_delay_ms * GST_MSECOND);
gst_harness_wait_for_clock_id_waits (h, 1, 60);
/* The next scheduled RTX for packet 11 is now at 230 + 40 = 270ms,
so the next thing that happens is that buffer 13 arrives in perfect time: */
now = 13 * TEST_BUF_DURATION;
gst_harness_set_time (h, now);
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h,
generate_test_buffer_full (now, 13, 13 * TEST_RTP_TS_DURATION)));
/*
*
* This will estimate the dts on the two missing packets to:
* ____ ____
* ... | 11 | | 12 | ...
* –––– ––––
* 220ms 240ms
*
* And given their regular interspacing of 20ms, it will schedule two RTX
* timers for them like so:
*
* ____ ____
* ... | 11 | | 12 | ...
* –––– ––––
* 230ms 250ms
*
* There are however two problems, packet 11 we have already sent one RTX for
* and its timeout is currently at 270ms, so we should not tamper with that,
* and as for packet 12, 250ms has already expired, so we now expect to see
* an rtx-event being sent for packet 12 immediately:
*/
verify_rtx_event (h, 12, 12 * TEST_BUF_DURATION,
rtx_delay_ms, TEST_BUF_DURATION);
/* and another crank will see the second RTX event being sent for packet 11 */
gst_harness_crank_single_clock_wait (h);
rtx_delay_ms += 40;
verify_rtx_event (h, 11, 11 * TEST_BUF_DURATION,
rtx_delay_ms, TEST_BUF_DURATION);
last_rtx_request = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int64 (last_rtx_request,
11 * TEST_BUF_DURATION + rtx_delay_ms * GST_MSECOND);
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_rtx_buffer_arrives_just_in_time)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 5 * TEST_BUF_MS;
gint next_seqnum;
GstBuffer *buffer;
GstClockTime now, last_rtx_request;
gint rtx_delay_ms = 0.5 * TEST_BUF_MS;
g_object_set (h->element, "do-retransmission", TRUE,
"rtx-max-retries", 1, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* Crank clock to send retransmission events requesting seqnum 6 which has
* not arrived yet. */
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, rtx_delay_ms, TEST_BUF_DURATION);
last_rtx_request = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int64 (last_rtx_request,
next_seqnum * TEST_BUF_DURATION + rtx_delay_ms * GST_MSECOND);
/* seqnum 6 arrives just before it times out and is considered lost */
now = 200 * GST_MSECOND;
gst_harness_set_time (h, now);
fail_unless_equals_int (GST_FLOW_OK, gst_harness_push (h,
generate_test_buffer_rtx (now, next_seqnum)));
buffer = gst_harness_pull (h);
fail_unless_equals_int (next_seqnum, get_rtp_seq_num (buffer));
gst_buffer_unref (buffer);
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum + 1,
"num-lost", G_TYPE_UINT64, (guint64) 0,
"rtx-count", G_TYPE_UINT64, (guint64) 1,
"rtx-success-count", G_TYPE_UINT64, (guint64) 1,
"rtx-per-packet", G_TYPE_DOUBLE, 1.0,
"rtx-rtt", G_TYPE_UINT64, (guint64) (now - last_rtx_request),
NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_rtx_buffer_arrives_too_late)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 5 * TEST_BUF_MS;
gint next_seqnum;
GstClockTime now, last_rtx_request;
gint rtx_delay_ms = 0.5 * TEST_BUF_MS;
g_object_set (h->element, "do-retransmission", TRUE,
"do-lost", TRUE, "rtx-max-retries", 1, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* Crank clock to send retransmission events requesting seqnum 6 which has
* not arrived yet. */
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, rtx_delay_ms, TEST_BUF_DURATION);
last_rtx_request = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int64 (last_rtx_request,
next_seqnum * TEST_BUF_DURATION + rtx_delay_ms * GST_MSECOND);
/* packet @next_seqnum is considered lost */
gst_harness_crank_single_clock_wait (h);
verify_lost_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, TEST_BUF_DURATION);
/* packet @next_seqnum arrives too late */
now = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int (GST_FLOW_OK, gst_harness_push (h,
generate_test_buffer_rtx (now, next_seqnum)));
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum,
"num-lost", G_TYPE_UINT64, (guint64) 1,
"num-late", G_TYPE_UINT64, (guint64) 1,
"num-duplicates", G_TYPE_UINT64, (guint64) 0,
"rtx-count", G_TYPE_UINT64, (guint64) 1,
"rtx-success-count", G_TYPE_UINT64, (guint64) 0,
"rtx-per-packet", G_TYPE_DOUBLE, 1.0,
"rtx-rtt", G_TYPE_UINT64, (guint64) (now - last_rtx_request),
NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_rtx_original_buffer_does_not_update_rtx_stats)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 100;
gint next_seqnum;
GstBuffer *buffer;
GstClockTime now, last_rtx_request;
gint rtx_delay_ms = 0.5 * TEST_BUF_MS;
g_object_set (h->element, "do-retransmission", TRUE,
"rtx-max-retries", 1, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
fail_unless_equals_int (6, next_seqnum);
/* Crank clock to send retransmission events requesting @next_seqnum which has
* not arrived yet. */
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, rtx_delay_ms, TEST_BUF_DURATION);
last_rtx_request = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int64 (last_rtx_request,
next_seqnum * TEST_BUF_DURATION + rtx_delay_ms * GST_MSECOND);
/* ORIGINAL seqnum 6 arrives just before it times out and is considered
* lost. */
now = 200 * GST_MSECOND;
gst_harness_set_time (h, now);
fail_unless_equals_int (GST_FLOW_OK, gst_harness_push (h,
generate_test_buffer_full (now,
next_seqnum, next_seqnum * TEST_RTP_TS_DURATION)));
buffer = gst_harness_pull (h);
fail_unless_equals_int (next_seqnum, get_rtp_seq_num (buffer));
gst_buffer_unref (buffer);
/* due to the advance in time, we will now also have sent
an rtx-request for 7 */
next_seqnum++;
verify_rtx_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, rtx_delay_ms, TEST_BUF_DURATION);
/* The original buffer does not count in the RTX stats. */
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum,
"num-lost", G_TYPE_UINT64, (guint64) 0,
"num-late", G_TYPE_UINT64, (guint64) 0,
"num-duplicates", G_TYPE_UINT64, (guint64) 0,
"rtx-count", G_TYPE_UINT64, (guint64) 2,
"rtx-success-count", G_TYPE_UINT64, (guint64) 0,
"rtx-per-packet", G_TYPE_DOUBLE, 0.0,
"rtx-rtt", G_TYPE_UINT64, (guint64) 0, NULL)));
/* Now the retransmitted packet arrives and stats should be updated. Note
* that the buffer arrives in time and should not be considered late, but
* a duplicate. */
fail_unless_equals_int (GST_FLOW_OK, gst_harness_push (h,
generate_test_buffer_rtx (now, 6)));
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum,
"num-lost", G_TYPE_UINT64, (guint64) 0,
"num-late", G_TYPE_UINT64, (guint64) 0,
"num-duplicates", G_TYPE_UINT64, (guint64) 1,
"rtx-count", G_TYPE_UINT64, (guint64) 2,
"rtx-success-count", G_TYPE_UINT64, (guint64) 0,
"rtx-per-packet", G_TYPE_DOUBLE, 1.0,
"rtx-rtt", G_TYPE_UINT64, (guint64) (now - last_rtx_request),
NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_rtx_duplicate_packet_updates_rtx_stats)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 100;
gint next_seqnum;
GstClockTime now, rtx_request_6, rtx_request_7;
gint rtx_delay_ms = 0.5 * TEST_BUF_MS;
gint i;
g_object_set (h->element, "do-retransmission", TRUE, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
fail_unless_equals_int (6, next_seqnum);
/* Push packet 8 so that 6 and 7 is missing */
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h, generate_test_buffer (8)));
/* Wait for NACKs on 6 and 7 */
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, 6, 6 * TEST_BUF_DURATION,
rtx_delay_ms, TEST_BUF_DURATION);
rtx_request_6 = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int64 (rtx_request_6,
6 * TEST_BUF_DURATION + rtx_delay_ms * GST_MSECOND);
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h,
7, 7 * TEST_BUF_DURATION, rtx_delay_ms, TEST_BUF_DURATION);
rtx_request_7 = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int64 (rtx_request_7,
7 * TEST_BUF_DURATION + rtx_delay_ms * GST_MSECOND);
/* Original packet 7 arrives */
now = 150 * GST_MSECOND;
gst_harness_set_time (h, now);
fail_unless_equals_int (GST_FLOW_OK, gst_harness_push (h,
generate_test_buffer_full (now, 7, 7 * TEST_RTP_TS_DURATION)));
/* We're still waiting for packet 6, so 7 should not be pushed */
gst_harness_wait_for_clock_id_waits (h, 1, 60);
fail_unless_equals_int (gst_harness_buffers_in_queue (h), 0);
/* The original buffer does not count in the RTX stats. */
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-lost", G_TYPE_UINT64, (guint64) 0,
"num-late", G_TYPE_UINT64, (guint64) 0,
"num-duplicates", G_TYPE_UINT64, (guint64) 0,
"rtx-count", G_TYPE_UINT64, (guint64) 2,
"rtx-success-count", G_TYPE_UINT64, (guint64) 0,
"rtx-per-packet", G_TYPE_DOUBLE, 0.0,
"rtx-rtt", G_TYPE_UINT64, (guint64) 0, NULL)));
/* Push RTX packet 7. Should be dropped as duplicate but update RTX stats. */
now = 160 * GST_MSECOND;
gst_harness_set_time (h, now);
fail_unless_equals_int (GST_FLOW_OK, gst_harness_push (h,
generate_test_buffer_rtx (now, 7)));
gst_harness_wait_for_clock_id_waits (h, 1, 60);
fail_unless_equals_int (gst_harness_buffers_in_queue (h), 0);
/* Check RTX stats with updated num-duplicates and rtx-rtt fields */
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum,
"num-lost", G_TYPE_UINT64, (guint64) 0,
"num-late", G_TYPE_UINT64, (guint64) 0,
"num-duplicates", G_TYPE_UINT64, (guint64) 1,
"rtx-count", G_TYPE_UINT64, (guint64) 2,
"rtx-success-count", G_TYPE_UINT64, (guint64) 0,
"rtx-per-packet", G_TYPE_DOUBLE, 1.0,
"rtx-rtt", G_TYPE_UINT64, (guint64) (now - rtx_request_7),
NULL)));
/* RTX packet 6 arrives, both 6, 7 and 8 is ready to be pulled */
fail_unless_equals_int (GST_FLOW_OK, gst_harness_push (h,
generate_test_buffer_rtx (now, 6)));
for (i = 6; i <= 8; i++) {
GstBuffer *buf = gst_harness_pull (h);
fail_unless_equals_int (i, get_rtp_seq_num (buf));
gst_buffer_unref (buf);
}
/* RTX stats is updated with success count increased. */
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum + 3,
"num-lost", G_TYPE_UINT64, (guint64) 0,
"num-late", G_TYPE_UINT64, (guint64) 0,
"num-duplicates", G_TYPE_UINT64, (guint64) 1,
"rtx-count", G_TYPE_UINT64, (guint64) 2,
"rtx-success-count", G_TYPE_UINT64, (guint64) 1,
"rtx-per-packet", G_TYPE_DOUBLE, 1.0,
"rtx-rtt", G_TYPE_UINT64, (guint64)
/* Use the rtx-rtt formula. Can be subject to change though. */
((now - rtx_request_6) + 47 * (now - rtx_request_7)) / 48,
NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_rtx_buffer_arrives_after_lost_updates_rtx_stats)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 100;
gint next_seqnum;
GstClockTime now, last_rtx_request;
gint rtx_delay_ms = 0.5 * TEST_BUF_MS;
g_object_set (h->element, "do-retransmission", TRUE,
"do-lost", TRUE, "rtx-max-retries", 1, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* Crank clock to send retransmission events requesting seqnum 6 which has
* not arrived yet. */
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, rtx_delay_ms, TEST_BUF_DURATION);
last_rtx_request = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int64 (last_rtx_request,
next_seqnum * TEST_BUF_DURATION + rtx_delay_ms * GST_MSECOND);
/* seqnum 6 is considered lost */
gst_harness_crank_single_clock_wait (h);
verify_lost_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, TEST_BUF_DURATION);
/* seqnum 6 arrives too late */
now = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int (GST_FLOW_OK, gst_harness_push (h,
generate_test_buffer_rtx (now, next_seqnum)));
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum,
"num-lost", G_TYPE_UINT64, (guint64) 1,
"num-late", G_TYPE_UINT64, (guint64) 1,
"num-duplicates", G_TYPE_UINT64, (guint64) 0,
"rtx-count", G_TYPE_UINT64, (guint64) 1,
"rtx-success-count", G_TYPE_UINT64, (guint64) 0,
"rtx-per-packet", G_TYPE_DOUBLE, 1.0,
"rtx-rtt", G_TYPE_UINT64, (guint64) (now - last_rtx_request),
NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_rtx_rtt_larger_than_retry_timeout)
{
/* When RTT is larger than retry period we will send two or more requests
* before receiving any retransmission packets */
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 100;
gint next_seqnum;
gint rtx_retry_timeout_ms = 20;
gint rtx_delay_ms = 0.5 * TEST_BUF_MS;
gint rtt = rtx_retry_timeout_ms * GST_MSECOND + 1;
GstClockTime now, first_request, second_request;
g_object_set (h->element, "do-retransmission", TRUE,
"rtx-retry-timeout", rtx_retry_timeout_ms, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* Wait for first NACK on 6 */
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, rtx_delay_ms, TEST_BUF_DURATION);
first_request = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int64 (first_request,
next_seqnum * TEST_BUF_DURATION + rtx_delay_ms * GST_MSECOND);
/* Packet @next_seqnum + 1 arrives in time (so that we avoid its EXPECTED
* timers to interfer with our test) */
push_test_buffer (h, next_seqnum + 1);
/* Simulating RTT > rtx-retry-timeout, we send a new NACK before receiving
* the RTX packet. Wait for second NACK on @next_seqnum */
gst_harness_crank_single_clock_wait (h);
rtx_delay_ms += rtx_retry_timeout_ms;
verify_rtx_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, rtx_delay_ms, TEST_BUF_DURATION);
second_request = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int64 (second_request,
next_seqnum * TEST_BUF_DURATION + rtx_delay_ms * GST_MSECOND);
/* The first retransmitted packet arrives */
now = first_request + rtt;
gst_harness_set_time (h, now);
fail_unless_equals_int (GST_FLOW_OK, gst_harness_push (h,
generate_test_buffer_rtx (now, next_seqnum)));
/* Pull packets @next_seqnum and @next_seqnum + 1 */
gst_buffer_unref (gst_harness_pull (h));
gst_buffer_unref (gst_harness_pull (h));
/* Stats should be updated. Note that RTT is not updated since we cannot be
* sure whether the RTX packet is in response to the first or second NACK. */
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum + 2,
"num-lost", G_TYPE_UINT64, (guint64) 0,
"num-late", G_TYPE_UINT64, (guint64) 0,
"num-duplicates", G_TYPE_UINT64, (guint64) 0,
"rtx-count", G_TYPE_UINT64, (guint64) 2,
"rtx-success-count", G_TYPE_UINT64, (guint64) 1,
"rtx-per-packet", G_TYPE_DOUBLE, 2.0,
"rtx-rtt", G_TYPE_UINT64, (guint64) 0, NULL)));
/* Packet @next_seqnum + 2 arrives in time */
push_test_buffer (h, next_seqnum + 2);
gst_buffer_unref (gst_harness_pull (h));
/* Now the second retransmitted packet arrives */
now = second_request + rtt;
gst_harness_set_time (h, now);
fail_unless_equals_int (GST_FLOW_OK, gst_harness_push (h,
generate_test_buffer_rtx (now, next_seqnum)));
/* The stats is updated with the correct RTT. */
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum + 3,
"num-lost", G_TYPE_UINT64, (guint64) 0,
"num-late", G_TYPE_UINT64, (guint64) 0,
"num-duplicates", G_TYPE_UINT64, (guint64) 1,
"rtx-count", G_TYPE_UINT64, (guint64) 2,
"rtx-success-count", G_TYPE_UINT64, (guint64) 1,
"rtx-per-packet", G_TYPE_DOUBLE, 2.0,
"rtx-rtt", G_TYPE_UINT64, (guint64) rtt, NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_rtx_no_request_if_time_past_retry_period)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
const gint latency_ms = 200;
const gint retry_period_ms = 120;
GstTestClock *testclock;
GstClockID pending_id;
GstClockTime time;
gint i;
gst_harness_set_src_caps (h, generate_caps ());
testclock = gst_harness_get_testclock (h);
g_object_set (h->element, "do-lost", TRUE, NULL);
g_object_set (h->element, "do-retransmission", TRUE, NULL);
g_object_set (h->element, "latency", latency_ms, NULL);
g_object_set (h->element, "rtx-retry-period", retry_period_ms, NULL);
/* push the first couple of buffers */
push_test_buffer (h, 0);
push_test_buffer (h, 1);
/* drop reconfigure event */
gst_event_unref (gst_harness_pull_upstream_event (h));
/* drop GstEventStreamStart & GstEventCaps & GstEventSegment */
for (i = 0; i < 3; i++)
gst_event_unref (gst_harness_pull_event (h));
/* Wait for the first EXPECTED timer to be scheduled */
gst_test_clock_wait_for_next_pending_id (testclock, &pending_id);
time = gst_clock_id_get_time (pending_id);
gst_clock_id_unref (pending_id);
fail_unless_equals_int64 (time, 2 * TEST_BUF_DURATION + 10 * GST_MSECOND);
/* Let the first EXPECTED timer time out and be sent. However, set the 'now'
* time to be past the retry-period simulating that the jitterbuffer has too
* much to do and is not able to process all timers in real-time. In this
* case the jitterbuffer should not schedule a new EXPECTED timer as that
* would just make matters worse (more unnecessary processing of a request
* that is already too late to be valuable). In practice this typically
* happens for high loss networks with low RTT. */
gst_test_clock_set_time_and_process (testclock,
2 * TEST_BUF_DURATION + retry_period_ms * GST_MSECOND + 1);
/* Verify the event. It could be argued that this request is already too
* late and unnecessary. However, in order to keep things simple (for now)
* we just keep the already scehduled EXPECTED timer, but refrain from
* scheduled another EXPECTED timer */
verify_rtx_event (h, 2, 2 * TEST_BUF_DURATION, 10, TEST_BUF_DURATION);
/* "crank" to reach the DEADLINE for packet 0 */
gst_harness_crank_single_clock_wait (h);
gst_buffer_unref (gst_harness_pull (h));
gst_buffer_unref (gst_harness_pull (h));
fail_unless_equals_int (0, gst_harness_upstream_events_in_queue (h));
fail_unless_equals_int (0, gst_harness_events_in_queue (h));
/* "crank" to time out the LOST event */
gst_harness_crank_single_clock_wait (h);
verify_lost_event (h, 2, 2 * TEST_BUF_DURATION, TEST_BUF_DURATION);
gst_object_unref (testclock);
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_rtx_same_delay_and_retry_timeout)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 5 * TEST_BUF_MS;
gint next_seqnum;
gint rtx_delay_ms = 20;
GstClockTime last_rtx_request;
g_object_set (h->element, "do-retransmission", TRUE,
"rtx-max-retries", 3, "rtx-delay", rtx_delay_ms,
"rtx-retry-timeout", rtx_delay_ms, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* Crank clock to send retransmission events requesting seqnum 6 which has
* not arrived yet. */
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, rtx_delay_ms, TEST_BUF_DURATION);
/* first rtx for packet @next_seqnum should arrive at the right time */
last_rtx_request = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int64 (last_rtx_request,
next_seqnum * TEST_BUF_DURATION + rtx_delay_ms * GST_MSECOND);
/* verify we have pulled out all rtx-events */
fail_unless_equals_int (0, gst_harness_upstream_events_in_queue (h));
/* now crank to get the second attempt at packet @next_seqnum */
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, rtx_delay_ms * 2, TEST_BUF_DURATION);
/* second rtx for seqnum 6 should arrive at 140 + 20ms */
last_rtx_request = gst_clock_get_time (GST_ELEMENT_CLOCK (h->element));
fail_unless_equals_int64 (last_rtx_request,
next_seqnum * TEST_BUF_DURATION + rtx_delay_ms * 2 * GST_MSECOND);
/* verify we have pulled out all rtx-events */
fail_unless_equals_int (0, gst_harness_upstream_events_in_queue (h));
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) next_seqnum,
"num-lost", G_TYPE_UINT64, (guint64) 0,
"rtx-count", G_TYPE_UINT64, (guint64) 2, NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_rtx_with_backwards_rtptime)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 40;
g_object_set (h->element, "do-retransmission", TRUE, NULL);
construct_deterministic_initial_state (h, latency_ms);
/*
* For video using B-frames, an expected sequence
* could be like this:
* (I = I-frame, P = P-frame, B = B-frame)
* ___ ___ ___
* ... | 3 | | 4 | | 5 |
* ––– ––– –––
* rtptime: 3(I) 5(P) 4(B)
* arrival(dts): 3 5 5
*
* Notice here that packet 5 (the B frame) make
* the rtptime go backwards.
*/
/* seqnum 3, arriving at time 3 with rtptime 3 */
push_test_buffer (h, 3);
gst_buffer_unref (gst_harness_pull (h));
/* seqnum 4, arriving at time 5 with rtptime 5 */
gst_harness_push (h, generate_test_buffer_full (5 * TEST_BUF_DURATION,
4, 5 * TEST_RTP_TS_DURATION));
gst_buffer_unref (gst_harness_pull (h));
/* seqnum 5, arriving at time 5 with rtptime 4 */
gst_harness_push (h, generate_test_buffer_full (5 * TEST_BUF_DURATION,
5, 4 * TEST_RTP_TS_DURATION));
gst_buffer_unref (gst_harness_pull (h));
/* crank to time-out the rtx-request for seqnum 6, the point here
being that the backwards rtptime did not mess up the timeout for
the rtx event */
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, 6, 5 * TEST_BUF_DURATION + 15 * GST_MSECOND,
17, 35 * GST_MSECOND);
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) 6,
"rtx-count", G_TYPE_UINT64, (guint64) 1,
"num-lost", G_TYPE_UINT64, (guint64) 0, NULL)));
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_rtx_timer_reuse)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
gint latency_ms = 5 * TEST_BUF_MS;
gint rtx_delay_ms = 0.5 * TEST_BUF_MS;
guint next_seqnum;
g_object_set (h->element, "do-retransmission", TRUE,
"do-lost", TRUE, "rtx-max-retries", 1, NULL);
next_seqnum = construct_deterministic_initial_state (h, latency_ms);
/* crank to timeout the only rtx-request, and the timer will
* now reschedule as a lost-timer internally */
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, rtx_delay_ms, TEST_BUF_DURATION);
/* but now buffer 6 arrives, and this should now reuse the lost-timer
* for 6, as an expected-timer for 7 */
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h, generate_test_buffer (next_seqnum)));
/* now crank to timeout the expected-timer for 7 and verify */
next_seqnum++;
gst_harness_crank_single_clock_wait (h);
verify_rtx_event (h, next_seqnum,
next_seqnum * TEST_BUF_DURATION, rtx_delay_ms, TEST_BUF_DURATION);
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_deadline_ts_offset)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
GstTestClock *testclock;
GstClockID id;
const gint jb_latency_ms = 10;
gst_harness_set_src_caps (h, generate_caps ());
testclock = gst_harness_get_testclock (h);
g_object_set (h->element, "latency", jb_latency_ms, NULL);
/* push the first buffer in */
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h, generate_test_buffer (0)));
/* wait_next_timeout() syncs on the deadline timer */
gst_test_clock_wait_for_next_pending_id (testclock, &id);
fail_unless_equals_uint64 (jb_latency_ms * GST_MSECOND,
gst_clock_id_get_time (id));
gst_clock_id_unref (id);
/* add ts-offset while waiting */
g_object_set (h->element, "ts-offset", 20 * GST_MSECOND, NULL);
gst_test_clock_set_time_and_process (testclock, jb_latency_ms * GST_MSECOND);
/* wait_next_timeout() syncs on the new deadline timer */
gst_test_clock_wait_for_next_pending_id (testclock, &id);
fail_unless_equals_uint64 ((20 + jb_latency_ms) * GST_MSECOND,
gst_clock_id_get_time (id));
gst_clock_id_unref (id);
/* now make deadline timer timeout */
gst_test_clock_set_time_and_process (testclock,
(20 + jb_latency_ms) * GST_MSECOND);
gst_buffer_unref (gst_harness_pull (h));
gst_object_unref (testclock);
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_push_big_gap)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
GstBuffer *buf;
const gint num_consecutive = 5;
gint i;
gst_harness_set_src_caps (h, generate_caps ());
for (i = 0; i < num_consecutive; i++)
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h, generate_test_buffer (1000 + i)));
fail_unless (gst_harness_crank_single_clock_wait (h));
for (i = 0; i < num_consecutive; i++) {
GstBuffer *buf = gst_harness_pull (h);
fail_unless_equals_int (1000 + i, get_rtp_seq_num (buf));
gst_buffer_unref (buf);
}
/* Push more packets from a different sequence number domain
* to trigger "big gap" logic. */
for (i = 0; i < num_consecutive; i++)
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h, generate_test_buffer (20000 + i)));
fail_unless (gst_harness_crank_single_clock_wait (h));
for (i = 0; i < num_consecutive; i++) {
GstBuffer *buf = gst_harness_pull (h);
fail_unless_equals_int (20000 + i, get_rtp_seq_num (buf));
gst_buffer_unref (buf);
}
/* Final buffer should be pushed straight through */
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h, generate_test_buffer (20000 + num_consecutive)));
buf = gst_harness_pull (h);
fail_unless_equals_int (20000 + num_consecutive, get_rtp_seq_num (buf));
gst_buffer_unref (buf);
gst_harness_teardown (h);
}
GST_END_TEST;
typedef struct
{
guint seqnum_offset;
guint late_buffer;
} TestLateArrivalInput;
static const TestLateArrivalInput
test_considered_lost_packet_in_large_gap_arrives_input[] = {
{0, 1}, {0, 2}, {65535, 1}, {65535, 2}, {65534, 1}, {65534, 2}
};
GST_START_TEST (test_considered_lost_packet_in_large_gap_arrives)
{
GstHarness *h = gst_harness_new ("rtpjitterbuffer");
GstTestClock *testclock;
GstClockID id;
GstBuffer *buffer;
gint jb_latency_ms = 20;
const TestLateArrivalInput *test_input =
&test_considered_lost_packet_in_large_gap_arrives_input[__i__];
guint seq_offset = test_input->seqnum_offset;
guint late_buffer = test_input->late_buffer;
gint i;
gst_harness_set_src_caps (h, generate_caps ());
testclock = gst_harness_get_testclock (h);
g_object_set (h->element, "do-lost", TRUE, "latency", jb_latency_ms, NULL);
/* first push buffer 0 */
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h, generate_test_buffer_full (0 * TEST_BUF_DURATION,
0 + seq_offset, 0 * TEST_RTP_TS_DURATION)));
fail_unless (gst_harness_crank_single_clock_wait (h));
gst_buffer_unref (gst_harness_pull (h));
/* drop GstEventStreamStart & GstEventCaps & GstEventSegment */
for (i = 0; i < 3; i++)
gst_event_unref (gst_harness_pull_event (h));
/* hop over 3 packets, and push buffer 4 (gap of 3) */
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h, generate_test_buffer_full (4 * TEST_BUF_DURATION,
4 + seq_offset, 4 * TEST_RTP_TS_DURATION)));
/* the jitterbuffer should be waiting for the timeout of a "large gap timer"
* for buffer 1 and 2 */
gst_test_clock_wait_for_next_pending_id (testclock, &id);
fail_unless_equals_uint64 (1 * TEST_BUF_DURATION +
jb_latency_ms * GST_MSECOND, gst_clock_id_get_time (id));
gst_clock_id_unref (id);
/* now buffer 1 sneaks in before the lost event for buffer 1 and 2 is
* processed */
fail_unless_equals_int (GST_FLOW_OK,
gst_harness_push (h,
generate_test_buffer_full (late_buffer * TEST_BUF_DURATION,
late_buffer + seq_offset, late_buffer * TEST_RTP_TS_DURATION)));
/* time out for lost packets 1 and 2 (one event, double duration) */
fail_unless (gst_harness_crank_single_clock_wait (h));
verify_lost_event (h, 1 + seq_offset, 1 * TEST_BUF_DURATION,
2 * TEST_BUF_DURATION);
/* time out for lost packets 3 */
fail_unless (gst_harness_crank_single_clock_wait (h));
verify_lost_event (h, 3 + seq_offset, 3 * TEST_BUF_DURATION,
1 * TEST_BUF_DURATION);
/* buffer 4 is pushed as normal */
buffer = gst_harness_pull (h);
fail_unless_equals_int ((4 + seq_offset) & 0xffff, get_rtp_seq_num (buffer));
gst_buffer_unref (buffer);
/* we have lost 3, and one of them arrived eventually, but too late */
fail_unless (verify_jb_stats (h->element,
gst_structure_new ("application/x-rtp-jitterbuffer-stats",
"num-pushed", G_TYPE_UINT64, (guint64) 2,
"num-lost", G_TYPE_UINT64, (guint64) 3,
"num-late", G_TYPE_UINT64, (guint64) 1, NULL)));
gst_object_unref (testclock);
gst_harness_teardown (h);
}
GST_END_TEST;
GST_START_TEST (test_performance)
{
GstHarness *h =
gst_harness_new_parse
("rtpjitterbuffer do-lost=1 do-retransmission=1 latency=1000");
GTimer *timer = g_timer_new ();
const gdouble test_duration = 2.0;
guint buffers_pushed = 0;
guint buffers_received;
gst_harness_set_src_caps (h, generate_caps ());
gst_harness_use_systemclock (h);
while (g_timer_elapsed (timer, NULL) < test_duration) {
/* Simulate 1ms packets */
guint n = buffers_pushed * 2; // every packet also produces a gap
guint16 seqnum = n & 0xffff;
guint32 rtp_ts = n * 8;
GstClockTime dts = n * GST_MSECOND;
gst_harness_push (h, generate_test_buffer_full (dts, seqnum, rtp_ts));
buffers_pushed++;
g_usleep (G_USEC_PER_SEC / 10000);
}
g_timer_destroy (timer);
buffers_received = gst_harness_buffers_received (h);
GST_INFO ("Pushed %d, received %d (%.1f%%)", buffers_pushed, buffers_received,
100.0 * buffers_received / buffers_pushed);
gst_harness_teardown (h);
}
GST_END_TEST;
static Suite *
rtpjitterbuffer_suite (void)
{
Suite *s = suite_create ("rtpjitterbuffer");
TCase *tc_chain = tcase_create ("general");
suite_add_tcase (s, tc_chain);
tcase_add_test (tc_chain, test_push_forward_seq);
tcase_add_test (tc_chain, test_push_backward_seq);
tcase_add_test (tc_chain, test_push_unordered);
tcase_add_test (tc_chain, test_basetime);
tcase_add_test (tc_chain, test_clear_pt_map);
tcase_add_test (tc_chain, test_lost_event);
tcase_add_test (tc_chain, test_only_one_lost_event_on_large_gaps);
tcase_add_test (tc_chain, test_two_lost_one_arrives_in_time);
tcase_add_test (tc_chain, test_late_packets_still_makes_lost_events);
tcase_add_test (tc_chain, test_lost_event_uses_pts);
tcase_add_test (tc_chain, test_lost_event_with_backwards_rtptime);
tcase_add_test (tc_chain, test_all_packets_are_timestamped_zero);
tcase_add_loop_test (tc_chain, test_num_late_when_considered_lost_arrives, 0,
2);
tcase_add_test (tc_chain, test_reorder_of_non_equidistant_packets);
tcase_add_test (tc_chain,
test_loss_equidistant_spacing_with_parameter_packets);
tcase_add_test (tc_chain, test_rtx_expected_next);
tcase_add_test (tc_chain, test_rtx_two_missing);
tcase_add_test (tc_chain, test_rtx_buffer_arrives_just_in_time);
tcase_add_test (tc_chain, test_rtx_buffer_arrives_too_late);
tcase_add_test (tc_chain, test_rtx_original_buffer_does_not_update_rtx_stats);
tcase_add_test (tc_chain, test_rtx_duplicate_packet_updates_rtx_stats);
tcase_add_test (tc_chain,
test_rtx_buffer_arrives_after_lost_updates_rtx_stats);
tcase_add_test (tc_chain, test_rtx_rtt_larger_than_retry_timeout);
tcase_add_test (tc_chain, test_rtx_no_request_if_time_past_retry_period);
tcase_add_test (tc_chain, test_rtx_same_delay_and_retry_timeout);
tcase_add_test (tc_chain, test_rtx_with_backwards_rtptime);
tcase_add_test (tc_chain, test_rtx_timer_reuse);
tcase_add_test (tc_chain, test_deadline_ts_offset);
tcase_add_test (tc_chain, test_push_big_gap);
tcase_add_loop_test (tc_chain,
test_considered_lost_packet_in_large_gap_arrives, 0,
G_N_ELEMENTS (test_considered_lost_packet_in_large_gap_arrives_input));
tcase_add_test (tc_chain, test_performance);
return s;
}
GST_CHECK_MAIN (rtpjitterbuffer);
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