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571120dcfb
Allow the user to register a child property of a base effect as a time property. This can be used by GES to correctly calculate the duration-limit of a clip when it has time effects on it. The existing ges_effect_class_register_rate_property is now used to automatically register such time effects for rate effects. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/merge_requests/177>
93 lines
3.2 KiB
C
93 lines
3.2 KiB
C
/* GStreamer Editing Services
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* Copyright (C) 2010 Thibault Saunier <thibault.saunier@collabora.co.uk>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#pragma once
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#include <glib-object.h>
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#include <ges/ges-types.h>
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#include <ges/ges-operation.h>
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G_BEGIN_DECLS
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#define GES_TYPE_BASE_EFFECT ges_base_effect_get_type()
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GES_DECLARE_TYPE(BaseEffect, base_effect, BASE_EFFECT);
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/**
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* GESBaseEffect:
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*/
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struct _GESBaseEffect
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{
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/*< private > */
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GESOperation parent;
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GESBaseEffectPrivate *priv;
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/* Padding for API extension */
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gpointer _ges_reserved[GES_PADDING];
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};
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/**
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* GESBaseEffectClass:
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* @parent_class: parent class
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*/
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struct _GESBaseEffectClass
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{
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/*< private > */
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GESOperationClass parent_class;
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/* Padding for API extension */
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gpointer _ges_reserved[GES_PADDING];
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};
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/**
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* GESBaseEffectTimeTranslationFunc:
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* @effect: The #GESBaseEffect that is doing the time translation
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* @time: The #GstClockTime to translation
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* @time_property_values: (element-type gchar* GValue*): A table of child
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* property name/value pairs
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* @user_data: Data passed to ges_base_effect_set_time_translation_funcs()
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*
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* A function for querying how an effect would translate a time if it had
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* the given child property values set. The keys for @time_properties will
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* be the same string that was passed to
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* ges_base_effect_register_time_property(), the values will be #GValue*
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* values of the corresponding child properties. You should always use the
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* values given in @time_properties before using the currently set values.
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*
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* Returns: The translated time.
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*/
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typedef GstClockTime (*GESBaseEffectTimeTranslationFunc) (GESBaseEffect * effect,
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GstClockTime time,
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GHashTable * time_property_values,
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gpointer user_data);
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GES_API gboolean
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ges_base_effect_register_time_property (GESBaseEffect * effect,
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const gchar * child_property_name);
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GES_API gboolean
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ges_base_effect_set_time_translation_funcs (GESBaseEffect * effect,
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GESBaseEffectTimeTranslationFunc source_to_sink_func,
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GESBaseEffectTimeTranslationFunc sink_to_source_func,
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gpointer user_data,
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GDestroyNotify destroy);
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GES_API gboolean
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ges_base_effect_is_time_effect (GESBaseEffect * effect);
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G_END_DECLS
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