mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
256 lines
7.2 KiB
C
256 lines
7.2 KiB
C
/* GStreamer
|
|
*
|
|
* Copyright (C) 2007,2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
|
|
* 2011 Stefan Sauer <ensonic@users.sf.net>
|
|
*
|
|
* gsttriggercontrolsource.c: Control source that provides some values at time-
|
|
* stamps
|
|
*
|
|
* 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., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
/**
|
|
* SECTION:gsttriggercontrolsource
|
|
* @short_description: interpolation control source
|
|
*
|
|
* #GstTriggerControlSource is a #GstControlSource, that returns values from user-given
|
|
* control points. It allows for a tolerance on the time-stamps.
|
|
*
|
|
* To use #GstTriggerControlSource get a new instance by calling
|
|
* gst_trigger_control_source_new(), bind it to a #GParamSpec 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 "gsttriggercontrolsource.h"
|
|
#include "gst/glib-compat-private.h"
|
|
#include "gst/math-compat.h"
|
|
|
|
#define GST_CAT_DEFAULT controller_debug
|
|
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
|
|
|
|
struct _GstTriggerControlSourcePrivate
|
|
{
|
|
gint64 tolerance;
|
|
};
|
|
|
|
/* control point accessors */
|
|
|
|
/* returns the default value of the property, except for times with specific values */
|
|
/* needed for one-shot events, such as notes and triggers */
|
|
|
|
static inline gdouble
|
|
_interpolate_trigger (GstTimedValueControlSource * self, GSequenceIter * iter,
|
|
GstClockTime timestamp)
|
|
{
|
|
GstControlPoint *cp;
|
|
gint64 tolerance = ((GstTriggerControlSource *) self)->priv->tolerance;
|
|
gboolean found = FALSE;
|
|
|
|
cp = g_sequence_get (iter);
|
|
if (GST_CLOCK_DIFF (cp->timestamp, timestamp) <= tolerance) {
|
|
found = TRUE;
|
|
} else {
|
|
if ((iter = g_sequence_iter_next (iter)) && !g_sequence_iter_is_end (iter)) {
|
|
cp = g_sequence_get (iter);
|
|
if (GST_CLOCK_DIFF (timestamp, cp->timestamp) <= tolerance) {
|
|
found = TRUE;
|
|
}
|
|
}
|
|
}
|
|
if (found) {
|
|
return cp->value;
|
|
}
|
|
return NAN;
|
|
}
|
|
|
|
static gboolean
|
|
interpolate_trigger_get (GstTimedValueControlSource * self,
|
|
GstClockTime timestamp, gdouble * value)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GSequenceIter *iter;
|
|
|
|
g_mutex_lock (&self->lock);
|
|
|
|
iter =
|
|
gst_timed_value_control_source_find_control_point_iter (self, timestamp);
|
|
if (iter) {
|
|
*value = _interpolate_trigger (self, iter, timestamp);
|
|
if (!isnan (*value))
|
|
ret = TRUE;
|
|
}
|
|
g_mutex_unlock (&self->lock);
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
interpolate_trigger_get_value_array (GstTimedValueControlSource * self,
|
|
GstClockTime timestamp, GstClockTime interval, guint n_values,
|
|
gdouble * values)
|
|
{
|
|
gboolean ret = FALSE;
|
|
guint i;
|
|
GstClockTime ts = timestamp;
|
|
GstClockTime next_ts = 0;
|
|
gdouble val;
|
|
GSequenceIter *iter1 = NULL, *iter2 = NULL;
|
|
gboolean triggered = FALSE;
|
|
|
|
g_mutex_lock (&self->lock);
|
|
for (i = 0; i < n_values; i++) {
|
|
val = NAN;
|
|
if (ts >= next_ts) {
|
|
iter1 = gst_timed_value_control_source_find_control_point_iter (self, ts);
|
|
if (!iter1) {
|
|
if (G_LIKELY (self->values))
|
|
iter2 = g_sequence_get_begin_iter (self->values);
|
|
else
|
|
iter2 = NULL;
|
|
} else {
|
|
iter2 = g_sequence_iter_next (iter1);
|
|
}
|
|
|
|
if (iter2 && !g_sequence_iter_is_end (iter2)) {
|
|
GstControlPoint *cp;
|
|
|
|
cp = g_sequence_get (iter2);
|
|
next_ts = cp->timestamp;
|
|
} else {
|
|
next_ts = GST_CLOCK_TIME_NONE;
|
|
}
|
|
|
|
if (iter1) {
|
|
val = _interpolate_trigger (self, iter1, ts);
|
|
if (!isnan (val))
|
|
ret = TRUE;
|
|
} else {
|
|
g_mutex_unlock (&self->lock);
|
|
return FALSE;
|
|
}
|
|
triggered = TRUE;
|
|
} else if (triggered) {
|
|
if (iter1) {
|
|
val = _interpolate_trigger (self, iter1, ts);
|
|
if (!isnan (val))
|
|
ret = TRUE;
|
|
} else {
|
|
g_mutex_unlock (&self->lock);
|
|
return FALSE;
|
|
}
|
|
triggered = FALSE;
|
|
}
|
|
*values = val;
|
|
ts += interval;
|
|
values++;
|
|
}
|
|
g_mutex_unlock (&self->lock);
|
|
return ret;
|
|
}
|
|
|
|
enum
|
|
{
|
|
PROP_TOLERANCE = 1,
|
|
};
|
|
|
|
#define _do_init \
|
|
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "trigger control source", 0, \
|
|
"timeline value trigger control source")
|
|
|
|
G_DEFINE_TYPE_WITH_CODE (GstTriggerControlSource, gst_trigger_control_source,
|
|
GST_TYPE_TIMED_VALUE_CONTROL_SOURCE, _do_init);
|
|
|
|
/**
|
|
* gst_trigger_control_source_new:
|
|
*
|
|
* This returns a new, unbound #GstTriggerControlSource.
|
|
*
|
|
* Returns: (transfer full): a new, unbound #GstTriggerControlSource.
|
|
*/
|
|
GstControlSource *
|
|
gst_trigger_control_source_new (void)
|
|
{
|
|
return g_object_newv (GST_TYPE_TRIGGER_CONTROL_SOURCE, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
gst_trigger_control_source_init (GstTriggerControlSource * self)
|
|
{
|
|
GstControlSource *csource = (GstControlSource *) self;
|
|
|
|
self->priv =
|
|
G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_TRIGGER_CONTROL_SOURCE,
|
|
GstTriggerControlSourcePrivate);
|
|
|
|
csource->get_value = (GstControlSourceGetValue) interpolate_trigger_get;
|
|
csource->get_value_array = (GstControlSourceGetValueArray)
|
|
interpolate_trigger_get_value_array;
|
|
}
|
|
|
|
static void
|
|
gst_trigger_control_source_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstTriggerControlSource *self = GST_TRIGGER_CONTROL_SOURCE (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_TOLERANCE:
|
|
GST_TIMED_VALUE_CONTROL_SOURCE_LOCK (self);
|
|
self->priv->tolerance = g_value_get_int64 (value);
|
|
GST_TIMED_VALUE_CONTROL_SOURCE_UNLOCK (self);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_trigger_control_source_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstTriggerControlSource *self = GST_TRIGGER_CONTROL_SOURCE (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_TOLERANCE:
|
|
g_value_set_int64 (value, self->priv->tolerance);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_trigger_control_source_class_init (GstTriggerControlSourceClass * klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
|
|
g_type_class_add_private (klass, sizeof (GstTriggerControlSourcePrivate));
|
|
|
|
gobject_class->set_property = gst_trigger_control_source_set_property;
|
|
gobject_class->get_property = gst_trigger_control_source_get_property;
|
|
|
|
g_object_class_install_property (gobject_class, PROP_TOLERANCE,
|
|
g_param_spec_int64 ("tolerance", "Tolerance",
|
|
"Amount of ns a control time can be off to still trigger",
|
|
0, G_MAXINT64, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
}
|