C++ (Cpp) GstGLMixerBinClass Examples

Example #1

File: gstglmixerbin.c Project: mbouron/gst-plugins-bad

static gboolean
_create_input_chain (GstGLMixerBin * self, struct input_chain *chain,
    GstPad * mixer_pad)
{
  GstGLMixerBinClass *klass = GST_GL_MIXER_BIN_GET_CLASS (self);
  GstPad *pad;
  gboolean res = TRUE;
  gchar *name;

  chain->self = self;
  chain->mixer_pad = mixer_pad;

  chain->upload = gst_element_factory_make ("glupload", NULL);
  chain->in_convert = gst_element_factory_make ("glcolorconvert", NULL);

  res &= gst_bin_add (GST_BIN (self), chain->in_convert);
  res &= gst_bin_add (GST_BIN (self), chain->upload);

  pad = gst_element_get_static_pad (chain->in_convert, "src");
  if (gst_pad_link (pad, mixer_pad) != GST_PAD_LINK_OK) {
    gst_object_unref (pad);
    return FALSE;
  }
  gst_object_unref (pad);
  res &=
      gst_element_link_pads (chain->upload, "src", chain->in_convert, "sink");

  pad = gst_element_get_static_pad (chain->upload, "sink");
  if (!pad) {
    return FALSE;
  } else {
    GST_DEBUG_OBJECT (self, "setting target sink pad %" GST_PTR_FORMAT, pad);
    name = gst_object_get_name (GST_OBJECT (mixer_pad));
    if (klass->create_input_pad) {
      chain->ghost_pad = klass->create_input_pad (self, chain->mixer_pad);
      gst_object_set_name (GST_OBJECT (chain->ghost_pad), name);
      gst_ghost_pad_set_target (chain->ghost_pad, pad);
    } else {
      chain->ghost_pad =
          GST_GHOST_PAD (gst_ghost_pad_new (GST_PAD_NAME (chain->mixer_pad),
              pad));
    }
    g_free (name);

    GST_OBJECT_LOCK (self);
    if (self->priv->running)
      gst_pad_set_active (GST_PAD (chain->ghost_pad), TRUE);
    GST_OBJECT_UNLOCK (self);

    gst_element_add_pad (GST_ELEMENT_CAST (self), GST_PAD (chain->ghost_pad));
    gst_object_unref (pad);
  }

  gst_element_sync_state_with_parent (chain->upload);
  gst_element_sync_state_with_parent (chain->in_convert);

  return TRUE;
}

Example #2

File: gstglmixerbin.c Project: thiblahute/gst-plugins-base

static GstStateChangeReturn
gst_gl_mixer_bin_change_state (GstElement * element, GstStateChange transition)
{
  GstGLMixerBin *self = GST_GL_MIXER_BIN (element);
  GstGLMixerBinClass *klass = GST_GL_MIXER_BIN_GET_CLASS (self);
  GstStateChangeReturn ret;

  switch (transition) {
    case GST_STATE_CHANGE_NULL_TO_READY:
      GST_OBJECT_LOCK (element);
      if (!self->mixer) {
        if (klass->create_element)
          self->mixer = klass->create_element ();

        if (!self->mixer) {
          g_signal_emit (element,
              gst_gl_mixer_bin_signals[SIGNAL_CREATE_ELEMENT], 0, &self->mixer);
          if (self->mixer && g_object_is_floating (self->mixer))
            gst_object_ref_sink (self->mixer);
        }

        if (!self->mixer) {
          GST_ERROR_OBJECT (element, "Failed to retrieve element");
          GST_OBJECT_UNLOCK (element);
          return GST_STATE_CHANGE_FAILURE;
        }
        GST_OBJECT_UNLOCK (element);
        if (!_connect_mixer_element (self))
          return GST_STATE_CHANGE_FAILURE;

        GST_OBJECT_LOCK (element);
      }
      self->priv->running = TRUE;
      GST_OBJECT_UNLOCK (element);
      break;
    default:
      break;
  }

  ret =
      GST_ELEMENT_CLASS (gst_gl_mixer_bin_parent_class)->change_state (element,
      transition);
  if (ret == GST_STATE_CHANGE_FAILURE)
    return ret;

  switch (transition) {
    case GST_STATE_CHANGE_READY_TO_NULL:
      GST_OBJECT_LOCK (self);
      self->priv->running = FALSE;
      GST_OBJECT_UNLOCK (self);
    default:
      break;
  }

  return ret;
}

Example #3

File: gstglmixerbin.c Project: mbouron/gst-plugins-bad

void
gst_gl_mixer_bin_finish_init (GstGLMixerBin * self)
{
  GstGLMixerBinClass *klass = GST_GL_MIXER_BIN_GET_CLASS (self);
  GstElement *element = NULL;

  if (klass->create_element)
    element = klass->create_element ();

  if (element)
    gst_gl_mixer_bin_finish_init_with_element (self, element);
}