Exemplos de gst_clock_add_observation em C++ (Cpp)

Exemplo n.º 1

Arquivo: gstsystemclock.c Projeto: BigBrother-International/gstreamer

static gboolean
test_async_full_slave_callback (GstClock * master, GstClockTime time,
    GstClockID id, GstClock * clock)
{
  GstClockTime stime, mtime;
  gdouble r_squared;

  /* notify the test case that we started */
  GST_INFO ("callback started");
  g_mutex_lock (&af_lock);
  g_cond_signal (&af_cond);

  /* wait for the test case to unref "clock" and signal */
  GST_INFO ("waiting for test case to signal");
  g_cond_wait (&af_cond, &af_lock);

  stime = gst_clock_get_internal_time (clock);
  mtime = gst_clock_get_time (master);

  gst_clock_add_observation (clock, stime, mtime, &r_squared);

  g_cond_signal (&af_cond);
  g_mutex_unlock (&af_lock);
  GST_INFO ("callback finished");

  return TRUE;
}

Exemplo n.º 2

Arquivo: gstclock.c Projeto: zsx/ossbuild

/* will be called repeatedly to sample the master and slave clock
 * to recalibrate the clock  */
static gboolean
gst_clock_slave_callback (GstClock * master, GstClockTime time,
    GstClockID id, GstClock * clock)
{
  GstClockTime stime, mtime;
  gdouble r_squared;

  stime = gst_clock_get_internal_time (clock);
  mtime = gst_clock_get_time (master);

  GST_CAT_DEBUG_OBJECT (GST_CAT_CLOCK, clock,
      "master %" GST_TIME_FORMAT ", slave %" GST_TIME_FORMAT,
      GST_TIME_ARGS (mtime), GST_TIME_ARGS (stime));

  gst_clock_add_observation (clock, stime, mtime, &r_squared);

  /* FIXME, we can use the r_squared value to adjust the timeout
   * value of the clockid */

  return TRUE;
}

Exemplo n.º 3

Arquivo: gstnetclientclock.c Projeto: Grobik1/gstreamer

static void
gst_net_client_clock_observe_times (GstNetClientClock * self,
    GstClockTime local_1, GstClockTime remote, GstClockTime local_2)
{
  GstClockTime current_timeout;
  GstClockTime local_avg;
  gdouble r_squared;
  GstClock *clock;

  if (local_2 < local_1)
    goto bogus_observation;

  local_avg = (local_2 + local_1) / 2;

  clock = GST_CLOCK_CAST (self);

  if (gst_clock_add_observation (GST_CLOCK (self), local_avg, remote,
          &r_squared)) {
    /* geto formula */
    current_timeout = (1e-3 / (1 - MIN (r_squared, 0.99999))) * GST_SECOND;
    current_timeout = MIN (current_timeout, gst_clock_get_timeout (clock));
  } else {
    current_timeout = 0;
  }

  GST_INFO ("next timeout: %" GST_TIME_FORMAT, GST_TIME_ARGS (current_timeout));
  self->priv->timeout_expiration = gst_util_get_timestamp () + current_timeout;

  return;

bogus_observation:
  {
    GST_WARNING_OBJECT (self, "time packet receive time < send time (%"
        GST_TIME_FORMAT " < %" GST_TIME_FORMAT ")", GST_TIME_ARGS (local_1),
        GST_TIME_ARGS (local_2));
    return;
  }
}

Exemplo n.º 4

Arquivo: gstnetclientclock.c Projeto: WangCrystal/gstreamer

static void
gst_net_client_clock_observe_times (GstNetClientClock * self,
    GstClockTime local_1, GstClockTime remote, GstClockTime local_2)
{
  GstClockTime local_avg;
  gdouble r_squared;
  GstClock *clock;

  if (local_2 < local_1)
    goto bogus_observation;

  local_avg = (local_2 + local_1) / 2;

  clock = GST_CLOCK_CAST (self);

  gst_clock_add_observation (GST_CLOCK (self), local_avg, remote, &r_squared);

  GST_CLOCK_SLAVE_LOCK (self);
  if (clock->filling) {
    self->current_timeout = 0;
  } else {
    /* geto formula */
    self->current_timeout =
        (1e-3 / (1 - MIN (r_squared, 0.99999))) * GST_SECOND;
    self->current_timeout = MIN (self->current_timeout, clock->timeout);
  }
  GST_CLOCK_SLAVE_UNLOCK (clock);

  return;

bogus_observation:
  {
    GST_WARNING_OBJECT (self, "time packet receive time < send time (%"
        GST_TIME_FORMAT " < %" GST_TIME_FORMAT ")", GST_TIME_ARGS (local_1),
        GST_TIME_ARGS (local_2));
    return;
  }
}