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1a02a59e42
In order for user to be able to track changes in the value set in GstTimedValueControlSource the following signals have been added: * value-added * value-removed * value-changed To be able to use a GstControlPoint to be marshalled into the signals, the GstControlPoint structure is now registerd as a GBoxed type. New API: ~~~~~~~ * GstTimedValueControlSource::value-added * GstTimedValueControlSource::value-removed * GstTimedValueControlSource::value-added https://bugzilla.gnome.org/show_bug.cgi?id=737616
135 lines
5 KiB
C
135 lines
5 KiB
C
/* GStreamer
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*
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* Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
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* 2011 Stefan Sauer <ensonic@users.sf.net>
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*
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* gsttimedvaluecontrolsource.h: Base class for timeed value based control
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* sources
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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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#ifndef __GST_TIMED_VALUE_CONTROL_SOURCE_H__
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#define __GST_TIMED_VALUE_CONTROL_SOURCE_H__
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#include <glib-object.h>
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#include <gst/gst.h>
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#include <gst/gstcontrolsource.h>
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G_BEGIN_DECLS
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#define GST_TYPE_TIMED_VALUE_CONTROL_SOURCE \
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(gst_timed_value_control_source_get_type ())
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#define GST_TIMED_VALUE_CONTROL_SOURCE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE, GstTimedValueControlSource))
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#define GST_TIMED_VALUE_CONTROL_SOURCE_CLASS(vtable) \
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(G_TYPE_CHECK_CLASS_CAST ((vtable), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE, GstTimedValueControlSourceClass))
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#define GST_IS_TIMED_VALUE_CONTROL_SOURCE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE))
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#define GST_IS_TIMED_VALUE_CONTROL_SOURCE_CLASS(vtable) \
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(G_TYPE_CHECK_CLASS_TYPE ((vtable), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE))
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#define GST_TIMED_VALUE_CONTROL_SOURCE_GET_CLASS(inst) \
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(G_TYPE_INSTANCE_GET_CLASS ((inst), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE, GstTimedValueControlSourceClass))
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typedef struct _GstTimedValueControlSource GstTimedValueControlSource;
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typedef struct _GstTimedValueControlSourceClass GstTimedValueControlSourceClass;
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typedef struct _GstTimedValueControlSourcePrivate GstTimedValueControlSourcePrivate;
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typedef struct _GstControlPoint GstControlPoint;
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/**
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* GstControlPoint:
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*
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* a internal structure for value+time and various temporary
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* values used for interpolation. This "inherits" from
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* GstTimedValue.
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*/
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struct _GstControlPoint
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{
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/* fields from GstTimedValue. DO NOT CHANGE! */
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GstClockTime timestamp; /* timestamp of the value change */
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gdouble value; /* the new value */
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/* internal fields */
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/* Caches for the interpolators */
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/* FIXME: we should not have this here already ... */
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union {
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struct {
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gdouble h;
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gdouble z;
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} cubic;
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} cache;
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};
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GType gst_control_point_get_type (void);
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/**
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* GstTimedValueControlSource:
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*
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* The instance structure of #GstControlSource.
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*/
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struct _GstTimedValueControlSource {
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GstControlSource parent;
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/*< protected >*/
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GMutex lock;
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GSequence *values; /* List of GstControlPoint */
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gint nvalues; /* Number of control points */
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gboolean valid_cache;
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/*< private >*/
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GstTimedValueControlSourcePrivate *priv;
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstTimedValueControlSourceClass {
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GstControlSourceClass parent_class;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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#define GST_TIMED_VALUE_CONTROL_SOURCE_LOCK(o) \
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g_mutex_lock(&((GstTimedValueControlSource *)o)->lock)
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#define GST_TIMED_VALUE_CONTROL_SOURCE_UNLOCK(o) \
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g_mutex_unlock(&((GstTimedValueControlSource *)o)->lock)
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GType gst_timed_value_control_source_get_type (void);
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/* Functions */
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GSequenceIter * gst_timed_value_control_source_find_control_point_iter (
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GstTimedValueControlSource * self,
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GstClockTime timestamp);
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gboolean gst_timed_value_control_source_set (GstTimedValueControlSource * self,
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GstClockTime timestamp,
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const gdouble value);
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gboolean gst_timed_value_control_source_set_from_list (GstTimedValueControlSource * self,
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const GSList * timedvalues);
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gboolean gst_timed_value_control_source_unset (GstTimedValueControlSource * self,
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GstClockTime timestamp);
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void gst_timed_value_control_source_unset_all (GstTimedValueControlSource *self);
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GList * gst_timed_value_control_source_get_all (GstTimedValueControlSource * self);
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gint gst_timed_value_control_source_get_count (GstTimedValueControlSource * self);
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void gst_timed_value_control_invalidate_cache (GstTimedValueControlSource * self);
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G_END_DECLS
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#endif /* __GST_TIMED_VALUE_CONTROL_SOURCE_H__ */
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