static GstStateChangeReturn webkit_data_src_change_state(GstElement* element, GstStateChange transition)
{
    GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
    WebkitDataSrc* src = WEBKIT_DATA_SRC(element);

    switch (transition) {
    case GST_STATE_CHANGE_NULL_TO_READY:
        if (!src->kid) {
            gst_element_post_message(element,
                                     gst_missing_element_message_new(element, "giostreamsrc"));
            GST_ELEMENT_ERROR(src, CORE, MISSING_PLUGIN, (0), ("no giostreamsrc"));
            return GST_STATE_CHANGE_FAILURE;
        }
        break;
    default:
        break;
    }

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

    // Downwards state change code should be here, after chaining up
    // to the parent class.

    return ret;
}
static void
post_missing_element_message (GstPlaySinkVideoConvert * self,
                              const gchar * name)
{
    GstMessage *msg;

    msg = gst_missing_element_message_new (GST_ELEMENT_CAST (self), name);
    gst_element_post_message (GST_ELEMENT_CAST (self), msg);
}
static void
gst_play_sink_convert_bin_post_missing_element_message (GstPlaySinkConvertBin *
    self, const gchar * name)
{
  GstMessage *msg;

  msg = gst_missing_element_message_new (GST_ELEMENT_CAST (self), name);
  gst_element_post_message (GST_ELEMENT_CAST (self), msg);
}
static void
post_missing_plugin_error (GstElement * dec, const gchar * element_name)
{
  GstMessage *msg;

  msg = gst_missing_element_message_new (dec, element_name);
  gst_element_post_message (dec, msg);

  GST_ELEMENT_ERROR (dec, CORE, MISSING_PLUGIN,
      ("Missing element '%s' - check your GStreamer installation.",
          element_name), (NULL));
}
static void
post_missing_element_message (GstVaapiDecodeBin * vaapidecbin,
    const gchar * missing_factory)
{
  GstMessage *msg;

  GST_ERROR_OBJECT (vaapidecbin, "Failed to create %s element",
      missing_factory);
  msg =
      gst_missing_element_message_new (GST_ELEMENT_CAST (vaapidecbin),
      missing_factory);
  gst_element_post_message (GST_ELEMENT_CAST (vaapidecbin), msg);
}
static void
post_missing_element_message (GstVaapiDecodeBin * vaapidecbin,
    const gchar * missing_factory)
{
  GstMessage *msg;

  msg = gst_missing_element_message_new (GST_ELEMENT_CAST (vaapidecbin),
      missing_factory);
  gst_element_post_message (GST_ELEMENT_CAST (vaapidecbin), msg);

  GST_ELEMENT_WARNING (vaapidecbin, CORE, MISSING_PLUGIN,
      ("Missing element '%s' - check your GStreamer installation.",
          missing_factory), ("video decoding might fail"));
}
static void
gst_rg_volume_init (GstRgVolume * self)
{
  GObjectClass *volume_class;
  GstPad *volume_pad, *ghost_pad;

  self->album_mode = DEFAULT_ALBUM_MODE;
  self->headroom = DEFAULT_HEADROOM;
  self->pre_amp = DEFAULT_PRE_AMP;
  self->fallback_gain = DEFAULT_FALLBACK_GAIN;
  self->target_gain = 0.0;
  self->result_gain = 0.0;

  self->volume_element = gst_element_factory_make ("volume", "rgvolume-volume");
  if (G_UNLIKELY (self->volume_element == NULL)) {
    GstMessage *msg;

    GST_WARNING_OBJECT (self, "could not create volume element");
    msg = gst_missing_element_message_new (GST_ELEMENT_CAST (self), "volume");
    gst_element_post_message (GST_ELEMENT_CAST (self), msg);

    /* Nothing else to do, we will refuse the state change from NULL to READY to
     * indicate that something went very wrong.  It is doubtful that someone
     * attempts changing our state though, since we end up having no pads! */
    return;
  }

  volume_class = G_OBJECT_GET_CLASS (G_OBJECT (self->volume_element));
  self->max_volume = G_PARAM_SPEC_DOUBLE
      (g_object_class_find_property (volume_class, "volume"))->maximum;

  GST_BIN_CLASS (parent_class)->add_element (GST_BIN_CAST (self),
      self->volume_element);

  volume_pad = gst_element_get_static_pad (self->volume_element, "sink");
  ghost_pad = gst_ghost_pad_new_from_template ("sink", volume_pad,
      gst_pad_get_pad_template (volume_pad));
  gst_object_unref (volume_pad);
  gst_pad_set_event_function (ghost_pad, gst_rg_volume_sink_event);
  gst_element_add_pad (GST_ELEMENT_CAST (self), ghost_pad);

  volume_pad = gst_element_get_static_pad (self->volume_element, "src");
  ghost_pad = gst_ghost_pad_new_from_template ("src", volume_pad,
      gst_pad_get_pad_template (volume_pad));
  gst_object_unref (volume_pad);
  gst_element_add_pad (GST_ELEMENT_CAST (self), ghost_pad);
}
Example #8
0
static gboolean
try_create_piece (RsnDvdBin * dvdbin, gint index,
    const gchar * factory, GType type, const gchar * name, const gchar * descr)
{
  GstElement *e;

  DVDBIN_LOCK (dvdbin);
  if (dvdbin->pieces[index] != NULL) {
    DVDBIN_UNLOCK (dvdbin);
    return TRUE;                /* Already exists */
  }
  DVDBIN_UNLOCK (dvdbin);

  if (factory != NULL) {
    e = gst_element_factory_make (factory, name);
  } else {
    if (name)
      e = g_object_new (type, "name", name, NULL);
    else
      e = g_object_new (type, NULL);
  }
  if (e == NULL)
    goto create_failed;

  if (!gst_bin_add (GST_BIN (dvdbin), e))
    goto add_failed;

  GST_DEBUG_OBJECT (dvdbin, "Added %s element: %" GST_PTR_FORMAT, descr, e);

  DVDBIN_LOCK (dvdbin);
  dvdbin->pieces[index] = e;
  DVDBIN_UNLOCK (dvdbin);

  return TRUE;
create_failed:
  gst_element_post_message (GST_ELEMENT_CAST (dvdbin),
      gst_missing_element_message_new (GST_ELEMENT_CAST (dvdbin), factory));
  GST_ELEMENT_ERROR (dvdbin, CORE, MISSING_PLUGIN, (NULL),
      ("Could not create %s element '%s'", descr, factory));
  return FALSE;
add_failed:
  gst_object_unref (e);
  GST_ELEMENT_ERROR (dvdbin, CORE, FAILED, (NULL),
      ("Could not add %s element to bin", descr));
  return FALSE;
}
Example #9
0
static gboolean
gst_hls_sink_create_elements (GstHlsSink * sink)
{
  GstPad *pad = NULL;

  GST_DEBUG_OBJECT (sink, "Creating internal elements");

  if (sink->elements_created)
    return TRUE;

  sink->multifilesink = gst_element_factory_make ("multifilesink", NULL);
  if (sink->multifilesink == NULL)
    goto missing_element;

  g_object_set (sink->multifilesink, "location", sink->location,
      "next-file", 3, "post-messages", TRUE, "max-files", sink->max_files,
      NULL);

  gst_bin_add (GST_BIN_CAST (sink), sink->multifilesink);

  pad = gst_element_get_static_pad (sink->multifilesink, "sink");
  gst_ghost_pad_set_target (GST_GHOST_PAD (sink->ghostpad), pad);
  gst_object_unref (pad);

  sink->elements_created = TRUE;
  return TRUE;

missing_element:
  gst_element_post_message (GST_ELEMENT_CAST (sink),
      gst_missing_element_message_new (GST_ELEMENT_CAST (sink),
          "multifilesink"));
  GST_ELEMENT_ERROR (sink, CORE, MISSING_PLUGIN,
      (("Missing element '%s' - check your GStreamer installation."),
          "multifilesink"), (NULL));
  return FALSE;
}
Example #10
0
static gboolean
gst_viewfinder_bin_create_elements (GstViewfinderBin * vfbin)
{
  GstElement *csp = NULL;
  GstElement *videoscale = NULL;
  GstPad *firstpad = NULL;
  const gchar *missing_element_name;
  gboolean newsink = FALSE;
  gboolean updated_converters = FALSE;

  GST_DEBUG_OBJECT (vfbin, "Creating internal elements");

  /* First check if we need to add/replace the internal sink */
  if (vfbin->video_sink) {
    if (vfbin->user_video_sink && vfbin->video_sink != vfbin->user_video_sink) {
      gst_bin_remove (GST_BIN_CAST (vfbin), vfbin->video_sink);
      gst_object_unref (vfbin->video_sink);
      vfbin->video_sink = NULL;
    }
  }

  if (!vfbin->video_sink) {
    if (vfbin->user_video_sink)
      vfbin->video_sink = gst_object_ref (vfbin->user_video_sink);
    else {
      vfbin->video_sink = gst_element_factory_make ("autovideosink",
          "vfbin-sink");
      if (!vfbin->video_sink) {
        missing_element_name = "autovideosink";
        goto missing_element;
      }
    }

    gst_bin_add (GST_BIN_CAST (vfbin), gst_object_ref (vfbin->video_sink));
    newsink = TRUE;
  }

  /* check if we want add/remove the conversion elements */
  if (vfbin->elements_created && vfbin->disable_converters) {
    /* remove the elements, user doesn't want them */

    gst_ghost_pad_set_target (GST_GHOST_PAD (vfbin->ghostpad), NULL);
    csp = gst_bin_get_by_name (GST_BIN_CAST (vfbin), "vfbin-csp");
    videoscale = gst_bin_get_by_name (GST_BIN_CAST (vfbin), "vfbin-videoscale");

    gst_bin_remove (GST_BIN_CAST (vfbin), csp);
    gst_bin_remove (GST_BIN_CAST (vfbin), videoscale);

    gst_object_unref (csp);
    gst_object_unref (videoscale);

    updated_converters = TRUE;
  } else if (!vfbin->elements_created && !vfbin->disable_converters) {
    gst_ghost_pad_set_target (GST_GHOST_PAD (vfbin->ghostpad), NULL);

    /* add the elements, user wants them */
    csp = gst_element_factory_make ("ffmpegcolorspace", "vfbin-csp");
    if (!csp) {
      missing_element_name = "ffmpegcolorspace";
      goto missing_element;
    }
    gst_bin_add (GST_BIN_CAST (vfbin), csp);

    videoscale = gst_element_factory_make ("videoscale", "vfbin->videoscale");
    if (!videoscale) {
      missing_element_name = "videoscale";
      goto missing_element;
    }
    gst_bin_add (GST_BIN_CAST (vfbin), videoscale);

    gst_element_link_pads_full (csp, "src", videoscale, "sink",
        GST_PAD_LINK_CHECK_NOTHING);

    vfbin->elements_created = TRUE;
    GST_DEBUG_OBJECT (vfbin, "Elements succesfully created and linked");

    updated_converters = TRUE;
  }
  /* otherwise, just leave it as is */

  /* if sink was replaced -> link it to the internal converters */
  if (newsink && !vfbin->disable_converters) {
    gboolean unref = FALSE;
    if (!videoscale) {
      videoscale = gst_bin_get_by_name (GST_BIN_CAST (vfbin),
          "vfbin-videscale");
      unref = TRUE;
    }

    if (!gst_element_link_pads_full (videoscale, "src", vfbin->video_sink,
            "sink", GST_PAD_LINK_CHECK_CAPS)) {
      GST_ELEMENT_ERROR (vfbin, CORE, NEGOTIATION, (NULL),
          ("linking videoscale and viewfindersink failed"));
    }

    if (unref)
      gst_object_unref (videoscale);
    videoscale = NULL;
  }

  /* Check if we need a new ghostpad target */
  if (updated_converters || (newsink && vfbin->disable_converters)) {
    if (vfbin->disable_converters) {
      firstpad = gst_element_get_static_pad (vfbin->video_sink, "sink");
    } else {
      /* csp should always exist at this point */
      firstpad = gst_element_get_static_pad (csp, "sink");
    }
  }

  /* need to change the ghostpad target if firstpad is set */
  if (firstpad) {
    if (!gst_ghost_pad_set_target (GST_GHOST_PAD (vfbin->ghostpad), firstpad))
      goto error;
    gst_object_unref (firstpad);
    firstpad = NULL;
  }

  return TRUE;

missing_element:
  gst_element_post_message (GST_ELEMENT_CAST (vfbin),
      gst_missing_element_message_new (GST_ELEMENT_CAST (vfbin),
          missing_element_name));
  GST_ELEMENT_ERROR (vfbin, CORE, MISSING_PLUGIN,
      (_("Missing element '%s' - check your GStreamer installation."),
          missing_element_name), (NULL));
  goto error;

error:
  GST_WARNING_OBJECT (vfbin, "Creating internal elements failed");
  if (firstpad)
    gst_object_unref (firstpad);
  return FALSE;
}