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503b739b23
Remove deprecated/unimplemented modes. Turn interpolation mode into a gobject property. Update docs and examples.
268 lines
8.7 KiB
C
268 lines
8.7 KiB
C
/* GStreamer
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*
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* Copyright (C) 2007,2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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*
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* gstinterpolationcontrolsource.c: Control source that provides several
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* interpolation methods
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:gstinterpolationcontrolsource
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* @short_description: interpolation control source
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*
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* #GstInterpolationControlSource is a #GstControlSource, that interpolates values between user-given
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* control points. It supports several interpolation modes and property types.
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*
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* To use #GstInterpolationControlSource get a new instance by calling
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* gst_interpolation_control_source_new(), bind it to a #GParamSpec and set some
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* control points by calling gst_timed_value_control_source_set().
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*
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* All functions are MT-safe.
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*
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*/
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#include <glib-object.h>
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#include <gst/gst.h>
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#include "gstinterpolationcontrolsource.h"
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#include "gstinterpolationcontrolsourceprivate.h"
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#include "gst/glib-compat-private.h"
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#define GST_CAT_DEFAULT controller_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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enum
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{
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PROP_MODE = 1
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};
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GType
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gst_interpolation_mode_get_type (void)
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{
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static gsize gtype = 0;
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static const GEnumValue values[] = {
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{GST_INTERPOLATION_MODE_NONE, "GST_INTERPOLATION_MODE_NONE", "none"},
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{GST_INTERPOLATION_MODE_LINEAR, "GST_INTERPOLATION_MODE_LINEAR", "linear"},
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{GST_INTERPOLATION_MODE_CUBIC, "GST_INTERPOLATION_MODE_CUBIC", "cubic"},
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{0, NULL, NULL}
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};
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if (g_once_init_enter (>ype)) {
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GType tmp = g_enum_register_static ("GstLFOWaveform", values);
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g_once_init_leave (>ype, tmp);
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}
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return (GType) gtype;
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}
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#define _do_init \
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GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "interpolation control source", 0, \
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"timeline value interpolating control source")
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G_DEFINE_TYPE_WITH_CODE (GstInterpolationControlSource,
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gst_interpolation_control_source, GST_TYPE_TIMED_VALUE_CONTROL_SOURCE,
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_do_init);
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struct _GstInterpolationControlSourcePrivate
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{
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GstInterpolationMode interpolation_mode;
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};
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/**
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* gst_interpolation_control_source_new:
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*
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* This returns a new, unbound #GstInterpolationControlSource.
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*
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* Returns: a new, unbound #GstInterpolationControlSource.
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*/
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GstInterpolationControlSource *
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gst_interpolation_control_source_new (void)
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{
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return g_object_newv (GST_TYPE_INTERPOLATION_CONTROL_SOURCE, 0, NULL);
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}
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static gboolean
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gst_interpolation_control_source_set_interpolation_mode
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(GstInterpolationControlSource * self, GstInterpolationMode mode)
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{
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gboolean ret = TRUE;
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GstControlSource *csource = GST_CONTROL_SOURCE (self);
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if (mode >= priv_gst_num_interpolation_methods
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|| priv_gst_interpolation_methods[mode] == NULL) {
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GST_WARNING ("interpolation mode %d invalid or not implemented yet", mode);
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return FALSE;
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}
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GST_TIMED_VALUE_CONTROL_SOURCE_LOCK (self);
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switch (gst_timed_value_control_source_get_base_value_type (
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(GstTimedValueControlSource *) self)) {
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case G_TYPE_INT:
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csource->get_value = priv_gst_interpolation_methods[mode]->get_int;
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csource->get_value_array =
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priv_gst_interpolation_methods[mode]->get_int_value_array;
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break;
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case G_TYPE_UINT:
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csource->get_value = priv_gst_interpolation_methods[mode]->get_uint;
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csource->get_value_array =
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priv_gst_interpolation_methods[mode]->get_uint_value_array;
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break;
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case G_TYPE_LONG:
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csource->get_value = priv_gst_interpolation_methods[mode]->get_long;
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csource->get_value_array =
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priv_gst_interpolation_methods[mode]->get_long_value_array;
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break;
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case G_TYPE_ULONG:
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csource->get_value = priv_gst_interpolation_methods[mode]->get_ulong;
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csource->get_value_array =
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priv_gst_interpolation_methods[mode]->get_ulong_value_array;
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break;
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case G_TYPE_INT64:
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csource->get_value = priv_gst_interpolation_methods[mode]->get_int64;
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csource->get_value_array =
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priv_gst_interpolation_methods[mode]->get_int64_value_array;
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break;
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case G_TYPE_UINT64:
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csource->get_value = priv_gst_interpolation_methods[mode]->get_uint64;
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csource->get_value_array =
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priv_gst_interpolation_methods[mode]->get_uint64_value_array;
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break;
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case G_TYPE_FLOAT:
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csource->get_value = priv_gst_interpolation_methods[mode]->get_float;
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csource->get_value_array =
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priv_gst_interpolation_methods[mode]->get_float_value_array;
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break;
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case G_TYPE_DOUBLE:
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csource->get_value = priv_gst_interpolation_methods[mode]->get_double;
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csource->get_value_array =
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priv_gst_interpolation_methods[mode]->get_double_value_array;
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break;
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case G_TYPE_BOOLEAN:
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csource->get_value = priv_gst_interpolation_methods[mode]->get_boolean;
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csource->get_value_array =
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priv_gst_interpolation_methods[mode]->get_boolean_value_array;
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break;
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case G_TYPE_ENUM:
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csource->get_value = priv_gst_interpolation_methods[mode]->get_enum;
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csource->get_value_array =
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priv_gst_interpolation_methods[mode]->get_enum_value_array;
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break;
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case G_TYPE_STRING:
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csource->get_value = priv_gst_interpolation_methods[mode]->get_string;
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csource->get_value_array =
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priv_gst_interpolation_methods[mode]->get_string_value_array;
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break;
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default:
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ret = FALSE;
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break;
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}
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/* Incomplete implementation */
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if (!csource->get_value || !csource->get_value_array) {
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ret = FALSE;
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}
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gst_timed_value_control_invalidate_cache ((GstTimedValueControlSource *)
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csource);
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self->priv->interpolation_mode = mode;
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GST_TIMED_VALUE_CONTROL_SOURCE_UNLOCK (self);
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return ret;
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}
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static gboolean
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gst_interpolation_control_source_bind (GstControlSource * csource,
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GParamSpec * pspec)
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{
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if (GST_CONTROL_SOURCE_CLASS
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(gst_interpolation_control_source_parent_class)->bind (csource, pspec)) {
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GstInterpolationControlSource *self =
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GST_INTERPOLATION_CONTROL_SOURCE (csource);
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if (gst_interpolation_control_source_set_interpolation_mode (self,
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self->priv->interpolation_mode))
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return TRUE;
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}
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return FALSE;
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}
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static void
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gst_interpolation_control_source_init (GstInterpolationControlSource * self)
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{
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self->priv =
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G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_INTERPOLATION_CONTROL_SOURCE,
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GstInterpolationControlSourcePrivate);
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self->priv->interpolation_mode = GST_INTERPOLATION_MODE_NONE;
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}
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static void
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gst_interpolation_control_source_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstInterpolationControlSource *self =
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GST_INTERPOLATION_CONTROL_SOURCE (object);
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switch (prop_id) {
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case PROP_MODE:
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gst_interpolation_control_source_set_interpolation_mode (self,
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(GstInterpolationMode) g_value_get_enum (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_interpolation_control_source_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstInterpolationControlSource *self =
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GST_INTERPOLATION_CONTROL_SOURCE (object);
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switch (prop_id) {
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case PROP_MODE:
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g_value_set_enum (value, self->priv->interpolation_mode);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_interpolation_control_source_class_init (GstInterpolationControlSourceClass
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* klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstControlSourceClass *csource_class = GST_CONTROL_SOURCE_CLASS (klass);
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g_type_class_add_private (klass,
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sizeof (GstInterpolationControlSourcePrivate));
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gobject_class->set_property = gst_interpolation_control_source_set_property;
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gobject_class->get_property = gst_interpolation_control_source_get_property;
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csource_class->bind = gst_interpolation_control_source_bind;
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g_object_class_install_property (gobject_class, PROP_MODE,
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g_param_spec_enum ("mode", "Mode", "Interpolation mode",
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GST_TYPE_INTERPOLATION_MODE, GST_INTERPOLATION_MODE_NONE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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