Esempi in C++ (Cpp) per gst_query_new_scheduling

Esempio n. 1

File: gstasfparse.c Progetto: drothlis/gst-plugins-bad

static gboolean
gst_asf_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
{
  GstQuery *query;
  gboolean pull_mode;

  query = gst_query_new_scheduling ();

  if (!gst_pad_peer_query (sinkpad, query)) {
    gst_query_unref (query);
    goto activate_push;
  }

  pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL);
  gst_query_unref (query);

  if (!pull_mode)
    goto activate_push;

  GST_DEBUG_OBJECT (sinkpad, "activating pull");
  return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);

activate_push:
  {
    GST_DEBUG_OBJECT (sinkpad, "activating push");
    return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
  }
}

Esempio n. 2

static gboolean
gst_wildmidi_activate (GstPad * sinkpad, GstObject * parent)
{
  GstQuery *query;
  gboolean pull_mode;

  query = gst_query_new_scheduling ();

  if (!gst_pad_peer_query (sinkpad, query)) {
    gst_query_unref (query);
    goto activate_push;
  }

  pull_mode = gst_query_has_scheduling_mode_with_flags (query,
      GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);
  gst_query_unref (query);

  if (!pull_mode)
    goto activate_push;

  GST_DEBUG_OBJECT (sinkpad, "activating pull");
  return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);

activate_push:
  {
    GST_DEBUG_OBJECT (sinkpad, "activating push");
    return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
  }
}

Esempio n. 3

File: gsttypefindelement.c Progetto: GrokImageCompression/gstreamer

static gboolean
gst_type_find_element_activate_sink (GstPad * pad, GstObject * parent)
{
  GstQuery *query;
  gboolean pull_mode;

  query = gst_query_new_scheduling ();

  if (!gst_pad_peer_query (pad, query)) {
    gst_query_unref (query);
    goto typefind_push;
  }

  pull_mode = gst_query_has_scheduling_mode_with_flags (query,
      GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);

  gst_query_unref (query);

  if (!pull_mode)
    goto typefind_push;

  if (!gst_pad_activate_mode (pad, GST_PAD_MODE_PULL, TRUE))
    goto typefind_push;

  /* only start our task if we ourselves decide to start in pull mode */
  return gst_pad_start_task (pad, (GstTaskFunction) gst_type_find_element_loop,
      pad, NULL);

typefind_push:
  {
    return gst_pad_activate_mode (pad, GST_PAD_MODE_PUSH, TRUE);
  }
}

Esempio n. 4

File: rndbuffersize.c Progetto: an146/gst-plugins-good

static gboolean
gst_rnd_buffer_size_activate (GstPad * pad, GstObject * parent)
{
  GstQuery *query;
  gboolean pull_mode;

  query = gst_query_new_scheduling ();

  if (!gst_pad_peer_query (pad, query)) {
    gst_query_unref (query);
    goto no_pull;
  }

  pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL);
  gst_query_unref (query);

  if (!pull_mode)
    goto no_pull;

  GST_DEBUG_OBJECT (pad, "activating pull");
  return gst_pad_activate_mode (pad, GST_PAD_MODE_PULL, TRUE);

  /* ERRORS */
no_pull:
  {
    GST_DEBUG_OBJECT (pad, "pull mode not supported");
    return FALSE;
  }
}

Esempio n. 5

File: gstrawparse.c Progetto: lubing521/gst-embedded-builder

static gboolean
gst_raw_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
{
  GstQuery *query;
  gboolean pull_mode = FALSE;

  query = gst_query_new_scheduling ();

  if (gst_pad_peer_query (sinkpad, query))
    pull_mode = gst_query_has_scheduling_mode_with_flags (query,
        GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);

  gst_query_unref (query);

  if (pull_mode) {
    GST_DEBUG ("going to pull mode");
    return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);
  } else {
    GST_DEBUG ("going to push (streaming) mode");
    return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
  }
}

Esempio n. 6

File: rndbuffersize.c Progetto: Distrotech/gst-plugins-good

static gboolean
gst_rnd_buffer_size_activate (GstPad * pad, GstObject * parent)
{
  GstQuery *query;
  gboolean pull_mode;

  query = gst_query_new_scheduling ();

  if (gst_pad_peer_query (pad, query))
    pull_mode = gst_query_has_scheduling_mode_with_flags (query,
        GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);
  else
    pull_mode = FALSE;

  gst_query_unref (query);

  if (pull_mode) {
    GST_DEBUG_OBJECT (pad, "activating pull");
    return gst_pad_activate_mode (pad, GST_PAD_MODE_PULL, TRUE);
  } else {
    GST_DEBUG_OBJECT (pad, "activating push");
    return gst_pad_activate_mode (pad, GST_PAD_MODE_PUSH, TRUE);
  }
}

Esempio n. 7

File: gsttypefindelement.c Progetto: lubing521/gst-embedded-builder

static gboolean
gst_type_find_element_activate_sink (GstPad * pad, GstObject * parent)
{
  GstTypeFindElement *typefind;
  GstQuery *query;
  gboolean pull_mode;
  GstCaps *found_caps = NULL;
  GstTypeFindProbability probability = GST_TYPE_FIND_NONE;
  GstSchedulingFlags sched_flags;

  typefind = GST_TYPE_FIND_ELEMENT (parent);

  /* if we have force caps, use those */
  GST_OBJECT_LOCK (typefind);
  if (typefind->force_caps) {
    found_caps = gst_caps_ref (typefind->force_caps);
    probability = GST_TYPE_FIND_MAXIMUM;
    GST_OBJECT_UNLOCK (typefind);

    GST_DEBUG ("Emiting found caps %" GST_PTR_FORMAT, found_caps);
    g_signal_emit (typefind, gst_type_find_element_signals[HAVE_TYPE],
        0, probability, found_caps);
    typefind->mode = MODE_NORMAL;
    /* the signal above could have made a downstream element activate
     * the pad in pull mode, we check if the pad is already active now and if
     * so, we are done */
    if (gst_pad_is_active (pad))
      return TRUE;

    goto typefind_push;
  }
  GST_OBJECT_UNLOCK (typefind);

  query = gst_query_new_scheduling ();

  if (!gst_pad_peer_query (pad, query)) {
    gst_query_unref (query);
    goto typefind_push;
  }

  gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);

  pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
      && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);

  gst_query_unref (query);

  if (!pull_mode)
    goto typefind_push;

  if (!gst_pad_activate_mode (pad, GST_PAD_MODE_PULL, TRUE))
    goto typefind_push;

  /* only start our task if we ourselves decide to start in pull mode */
  return gst_pad_start_task (pad, (GstTaskFunction) gst_type_find_element_loop,
      pad, NULL);

typefind_push:
  {
    return gst_pad_activate_mode (pad, GST_PAD_MODE_PUSH, TRUE);
  }
}