C++ (Cpp) gst_child_proxy_set_property Examples

Example #1

File: gstiirequalizer3bands.c Project: JJCG/gst-plugins-good

static void
gst_iir_equalizer_3bands_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec)
{
  GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);

  switch (prop_id) {
    case ARG_BAND0:
      gst_child_proxy_set_property (GST_OBJECT (equ), "band0::gain", value);
      break;
    case ARG_BAND1:
      gst_child_proxy_set_property (GST_OBJECT (equ), "band1::gain", value);
      break;
    case ARG_BAND2:
      gst_child_proxy_set_property (GST_OBJECT (equ), "band2::gain", value);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

Example #2

File: gstpreset.c Project: lubing521/gst-embedded-builder

/* load the presets of @name for the instance @preset. Returns %FALSE if something
 * failed. */
static gboolean
gst_preset_default_load_preset (GstPreset * preset, const gchar * name)
{
  GKeyFile *presets;
  gchar **props;
  guint i;
  GObjectClass *gclass;
  gboolean is_child_proxy;

  /* get the presets from the type */
  if (!(presets = preset_get_keyfile (preset)))
    goto no_presets;

  /* get the preset name */
  if (!g_key_file_has_group (presets, name))
    goto no_group;

  GST_DEBUG_OBJECT (preset, "loading preset : '%s'", name);

  /* get the properties that we can configure in this element */
  if (!(props = gst_preset_get_property_names (preset)))
    goto no_properties;

  gclass = G_OBJECT_CLASS (GST_ELEMENT_GET_CLASS (preset));
  is_child_proxy = GST_IS_CHILD_PROXY (preset);

  /* for each of the property names, find the preset parameter and try to
   * configure the property with its value */
  for (i = 0; props[i]; i++) {
    gchar *str;
    GValue gvalue = { 0, };
    GParamSpec *property = NULL;

    /* check if we have a settings for this element property */
    if (!(str = g_key_file_get_value (presets, name, props[i], NULL))) {
      /* the element has a property but the parameter is not in the keyfile */
      GST_WARNING_OBJECT (preset, "parameter '%s' not in preset", props[i]);
      continue;
    }

    GST_DEBUG_OBJECT (preset, "setting value '%s' for property '%s'", str,
        props[i]);

    if (is_child_proxy) {
      gst_child_proxy_lookup ((GstChildProxy *) preset, props[i], NULL,
          &property);
    } else {
      property = g_object_class_find_property (gclass, props[i]);
    }
    if (!property) {
      /* the parameter was in the keyfile, the element said it supported it but
       * then the property was not found in the element. This should not happen. */
      GST_WARNING_OBJECT (preset, "property '%s' not in object", props[i]);
      g_free (str);
      continue;
    }

    /* try to deserialize the property value from the keyfile and set it as
     * the object property */
    g_value_init (&gvalue, property->value_type);
    if (gst_value_deserialize (&gvalue, str)) {
      if (is_child_proxy) {
        gst_child_proxy_set_property ((GstChildProxy *) preset, props[i],
            &gvalue);
      } else {
        g_object_set_property ((GObject *) preset, props[i], &gvalue);
      }
    } else {
      GST_WARNING_OBJECT (preset,
          "deserialization of value '%s' for property '%s' failed", str,
          props[i]);
    }
    g_value_unset (&gvalue);
    g_free (str);
  }
  g_strfreev (props);

  return TRUE;

  /* ERRORS */
no_presets:
  {
    GST_WARNING_OBJECT (preset, "no presets");
    return FALSE;
  }
no_group:
  {
    GST_WARNING_OBJECT (preset, "no preset named '%s'", name);
    return FALSE;
  }
no_properties:
  {
    GST_INFO_OBJECT (preset, "no properties");
    return FALSE;
  }
}