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/* GStreamer
*
* Copyright (C) 2007,2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* gstinterpolationcontrolsource.c: Control source that provides several
* interpolation methods
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:gstinterpolationcontrolsource
* @short_description: interpolation control source
*
* #GstInterpolationControlSource is a #GstControlSource, that interpolates values between user-given
* control points. It supports several interpolation modes and property types.
*
* To use #GstInterpolationControlSource get a new instance by calling
* gst_interpolation_control_source_new(), bind it to a #GParamSpec, select a interpolation mode with
* gst_interpolation_control_source_set_interpolation_mode() and set some control points by calling
* gst_timed_value_control_source_set().
*
* All functions are MT-safe.
*
*/
#include <glib-object.h>
#include <gst/gst.h>
#include "gstinterpolationcontrolsource.h"
#include "gstinterpolationcontrolsourceprivate.h"
#include "gst/glib-compat-private.h"
#define GST_CAT_DEFAULT controller_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
#define _do_init \
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "interpolation control source", 0, \
"timeline value interpolating control source")
G_DEFINE_TYPE_WITH_CODE (GstInterpolationControlSource,
gst_interpolation_control_source, GST_TYPE_TIMED_VALUE_CONTROL_SOURCE,
_do_init);
struct _GstInterpolationControlSourcePrivate
{
GstInterpolateMode interpolation_mode;
};
/**
* gst_interpolation_control_source_new:
*
* This returns a new, unbound #GstInterpolationControlSource.
*
* Returns: a new, unbound #GstInterpolationControlSource.
*/
GstInterpolationControlSource *
gst_interpolation_control_source_new (void)
{
return g_object_newv (GST_TYPE_INTERPOLATION_CONTROL_SOURCE, 0, NULL);
}
/**
* gst_interpolation_control_source_set_interpolation_mode:
* @self: the #GstInterpolationControlSource object
* @mode: interpolation mode
*
* Sets the given interpolation mode.
*
* <note><para>User interpolation is not yet available and quadratic interpolation
* is deprecated and maps to cubic interpolation.</para></note>
*
* Returns: %TRUE if the interpolation mode could be set, %FALSE otherwise
*/
/* *INDENT-OFF* */
gboolean
gst_interpolation_control_source_set_interpolation_mode (
GstInterpolationControlSource * self, GstInterpolateMode mode)
/* *INDENT-ON* */
{
gboolean ret = TRUE;
GstControlSource *csource = GST_CONTROL_SOURCE (self);
if (mode >= priv_gst_num_interpolation_methods
|| priv_gst_interpolation_methods[mode] == NULL) {
GST_WARNING ("interpolation mode %d invalid or not implemented yet", mode);
return FALSE;
}
if (mode == GST_INTERPOLATE_QUADRATIC) {
GST_WARNING ("Quadratic interpolation mode is deprecated, using cubic"
"interpolation mode");
}
GST_TIMED_VALUE_CONTROL_SOURCE_LOCK (self);
switch (gst_timed_value_control_source_get_base_value_type (
(GstTimedValueControlSource *) self)) {
case G_TYPE_INT:
csource->get_value = priv_gst_interpolation_methods[mode]->get_int;
csource->get_value_array =
priv_gst_interpolation_methods[mode]->get_int_value_array;
break;
case G_TYPE_UINT:
csource->get_value = priv_gst_interpolation_methods[mode]->get_uint;
csource->get_value_array =
priv_gst_interpolation_methods[mode]->get_uint_value_array;
break;
case G_TYPE_LONG:
csource->get_value = priv_gst_interpolation_methods[mode]->get_long;
csource->get_value_array =
priv_gst_interpolation_methods[mode]->get_long_value_array;
break;
case G_TYPE_ULONG:
csource->get_value = priv_gst_interpolation_methods[mode]->get_ulong;
csource->get_value_array =
priv_gst_interpolation_methods[mode]->get_ulong_value_array;
break;
case G_TYPE_INT64:
csource->get_value = priv_gst_interpolation_methods[mode]->get_int64;
csource->get_value_array =
priv_gst_interpolation_methods[mode]->get_int64_value_array;
break;
case G_TYPE_UINT64:
csource->get_value = priv_gst_interpolation_methods[mode]->get_uint64;
csource->get_value_array =
priv_gst_interpolation_methods[mode]->get_uint64_value_array;
break;
case G_TYPE_FLOAT:
csource->get_value = priv_gst_interpolation_methods[mode]->get_float;
csource->get_value_array =
priv_gst_interpolation_methods[mode]->get_float_value_array;
break;
case G_TYPE_DOUBLE:
csource->get_value = priv_gst_interpolation_methods[mode]->get_double;
csource->get_value_array =
priv_gst_interpolation_methods[mode]->get_double_value_array;
break;
case G_TYPE_BOOLEAN:
csource->get_value = priv_gst_interpolation_methods[mode]->get_boolean;
csource->get_value_array =
priv_gst_interpolation_methods[mode]->get_boolean_value_array;
break;
case G_TYPE_ENUM:
csource->get_value = priv_gst_interpolation_methods[mode]->get_enum;
csource->get_value_array =
priv_gst_interpolation_methods[mode]->get_enum_value_array;
break;
case G_TYPE_STRING:
csource->get_value = priv_gst_interpolation_methods[mode]->get_string;
csource->get_value_array =
priv_gst_interpolation_methods[mode]->get_string_value_array;
break;
default:
ret = FALSE;
break;
}
/* Incomplete implementation */
if (!csource->get_value || !csource->get_value_array) {
ret = FALSE;
}
gst_timed_value_control_invalidate_cache ((GstTimedValueControlSource *)
csource);
self->priv->interpolation_mode = mode;
GST_TIMED_VALUE_CONTROL_SOURCE_UNLOCK (self);
return ret;
}
static gboolean
gst_interpolation_control_source_bind (GstControlSource * csource,
GParamSpec * pspec)
{
if (GST_CONTROL_SOURCE_CLASS
(gst_interpolation_control_source_parent_class)->bind (csource, pspec)) {
GstInterpolationControlSource *self =
GST_INTERPOLATION_CONTROL_SOURCE (csource);
if (gst_interpolation_control_source_set_interpolation_mode (self,
self->priv->interpolation_mode))
return TRUE;
}
return FALSE;
}
static void
gst_interpolation_control_source_init (GstInterpolationControlSource * self)
{
self->priv =
G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_INTERPOLATION_CONTROL_SOURCE,
GstInterpolationControlSourcePrivate);
self->priv->interpolation_mode = GST_INTERPOLATE_NONE;
}
static void
gst_interpolation_control_source_class_init (GstInterpolationControlSourceClass
* klass)
{
GstControlSourceClass *csource_class = GST_CONTROL_SOURCE_CLASS (klass);
g_type_class_add_private (klass,
sizeof (GstInterpolationControlSourcePrivate));
csource_class->bind = gst_interpolation_control_source_bind;
}
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