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ptpclock: Use a system clock for the time observations instead of gst_util_get_timestamp()

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They don't necessarily use the same underlying clocks (e.g. on Windows), or
might be configured to a different clock type (monotonic vs. real time clock).

We need the values a clean system clock returns, as those are the values used
by the internal clocks.
This commit is contained in:
Sebastian Dröge 2015-06-06 14:19:21 +02:00
parent bf62a96549
commit 42b16c9e3c
1 changed files with 16 additions and 4 deletions
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20
libs/gst/net/gstptpclock.c
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@ -233,6 +233,7 @@ static GMainContext *main_context;
static GMainLoop *main_loop; static GMainLoop *main_loop;
static GIOChannel *stdin_channel, *stdout_channel; static GIOChannel *stdin_channel, *stdout_channel;
static GRand *delay_req_rand; static GRand *delay_req_rand;
static GstClock *observation_system_clock;
static PtpClockIdentity ptp_clock_id = { GST_PTP_CLOCK_ID_NONE, 0 }; static PtpClockIdentity ptp_clock_id = { GST_PTP_CLOCK_ID_NONE, 0 };
typedef struct typedef struct
@ -968,7 +969,8 @@ send_delay_req_timeout (PtpPendingSync * sync)
return G_SOURCE_REMOVE; return G_SOURCE_REMOVE;
} }
sync->delay_req_send_time_local = gst_util_get_timestamp (); sync->delay_req_send_time_local =
gst_clock_get_time (observation_system_clock);
status = status =
g_io_channel_write_chars (stdout_channel, g_io_channel_write_chars (stdout_channel,
@ -997,7 +999,7 @@ send_delay_req_timeout (PtpPendingSync * sync)
static gboolean static gboolean
send_delay_req (PtpDomainData * domain, PtpPendingSync * sync) send_delay_req (PtpDomainData * domain, PtpPendingSync * sync)
{ {
GstClockTime now = gst_util_get_timestamp (); GstClockTime now = gst_clock_get_time (observation_system_clock);
guint timeout; guint timeout;
GSource *timeout_source; GSource *timeout_source;
@ -1765,7 +1767,7 @@ have_stdin_data_cb (GIOChannel * channel, GIOCondition condition,
switch (header.type) { switch (header.type) {
case TYPE_EVENT: case TYPE_EVENT:
case TYPE_GENERAL:{ case TYPE_GENERAL:{
GstClockTime receive_time = gst_util_get_timestamp (); GstClockTime receive_time = gst_clock_get_time (observation_system_clock);
PtpMessage msg; PtpMessage msg;
if (parse_ptp_message (&msg, (const guint8 *) buffer, header.size)) { if (parse_ptp_message (&msg, (const guint8 *) buffer, header.size)) {
@ -1801,7 +1803,7 @@ have_stdin_data_cb (GIOChannel * channel, GIOCondition condition,
static gboolean static gboolean
cleanup_cb (gpointer data) cleanup_cb (gpointer data)
{ {
GstClockTime now = gst_util_get_timestamp (); GstClockTime now = gst_clock_get_time (observation_system_clock);
GList *l, *m, *n; GList *l, *m, *n;
for (l = domain_data; l; l = l->next) { for (l = domain_data; l; l = l->next) {
@ -2074,6 +2076,9 @@ gst_ptp_init (guint64 clock_id, gchar ** interfaces)
g_io_channel_set_buffered (stdout_channel, FALSE); g_io_channel_set_buffered (stdout_channel, FALSE);
delay_req_rand = g_rand_new (); delay_req_rand = g_rand_new ();
observation_system_clock =
g_object_new (GST_TYPE_SYSTEM_CLOCK, "name", "ptp-observation-clock",
NULL);
initted = TRUE; initted = TRUE;
@ -2125,6 +2130,10 @@ done:
if (delay_req_rand) if (delay_req_rand)
g_rand_free (delay_req_rand); g_rand_free (delay_req_rand);
delay_req_rand = NULL; delay_req_rand = NULL;
if (observation_system_clock)
gst_object_unref (observation_system_clock);
observation_system_clock = NULL;
} }
g_mutex_unlock (&ptp_lock); g_mutex_unlock (&ptp_lock);
@ -2180,6 +2189,9 @@ gst_ptp_deinit (void)
if (delay_req_rand) if (delay_req_rand)
g_rand_free (delay_req_rand); g_rand_free (delay_req_rand);
delay_req_rand = NULL; delay_req_rand = NULL;
if (observation_system_clock)
gst_object_unref (observation_system_clock);
observation_system_clock = NULL;
for (l = domain_data; l; l = l->next) { for (l = domain_data; l; l = l->next) {
PtpDomainData *domain = l->data; PtpDomainData *domain = l->data;