void
gst_v4l2_color_balance_set_value (GstV4l2Object * v4l2object,
GstColorBalanceChannel * channel, gint value)
{
GstV4l2ColorBalanceChannel *v4l2channel =
GST_V4L2_COLOR_BALANCE_CHANNEL (channel);
/* assert that we're opened and that we're using a known item */
g_return_if_fail (GST_V4L2_IS_OPEN (v4l2object));
g_return_if_fail (gst_v4l2_color_balance_contains_channel (v4l2object,
v4l2channel));
gst_v4l2_set_attribute (v4l2object, v4l2channel->id, value);
}
static gboolean
set_control (GQuark field_id, const GValue * value, gpointer user_data)
{
GstV4l2Object *v4l2object = user_data;
GQuark normalised_field_id;
gpointer *d;
/* 32 bytes is the maximum size for a control name according to v4l2 */
gchar name[32];
/* Backwards compatibility: in the past GStreamer would normalise strings in
a subtly different way to v4l2-ctl. e.g. the kernel's "Focus (absolute)"
would become "focus__absolute_" whereas now it becomes "focus_absolute".
Please remove the following in GStreamer 1.5 for 1.6 */
strncpy (name, g_quark_to_string (field_id), sizeof (name));
name[31] = '\0';
gst_v4l2_normalise_control_name (name);
normalised_field_id = g_quark_from_string (name);
if (normalised_field_id != field_id)
g_warning ("In GStreamer 1.4 the way V4L2 control names were normalised "
"changed. Instead of setting \"%s\" please use \"%s\". The former is "
"deprecated and will be removed in a future version of GStreamer",
g_quark_to_string (field_id), name);
field_id = normalised_field_id;
d = g_datalist_id_get_data (&v4l2object->controls, field_id);
if (!d) {
GST_WARNING_OBJECT (v4l2object,
"Control '%s' does not exist or has an unsupported type.",
g_quark_to_string (field_id));
return TRUE;
}
if (!G_VALUE_HOLDS (value, G_TYPE_INT)) {
GST_WARNING_OBJECT (v4l2object,
"'int' value expected for control '%s'.", g_quark_to_string (field_id));
return TRUE;
}
gst_v4l2_set_attribute (v4l2object, GPOINTER_TO_INT (d),
g_value_get_int (value));
return TRUE;
}
