gstreamer/libs/gst/controller/gstcontroller.c

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/* GStreamer
*
* Copyright (C) <2005> Stefan Kost <ensonic at users dot sf dot net>
*
* gstcontroller.c: dynamic parameter control subsystem
*
* 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:gstcontroller
* @short_description: dynamic parameter control subsystem
*
* The controller subsystem offers a lightweight way to adjust gobject
* properties over stream-time. It works by using time-stamped value pairs that
* are queued for element-properties. At run-time the elements continously pull
* values changes for the current stream-time.
*
* What needs to be changed in a #GstElement?
* Very little - it is just two steps to make a plugin controllable!
* <orderedlist>
* <listitem><para>
* mark gobject-properties paramspecs that make sense to be controlled,
* by GST_PARAM_CONTROLLABLE.
* </para></listitem>
* <listitem><para>
* when processing data (get, chain, loop function) at the beginning call
* gst_object_sync_values(element,timestamp).
* This will made the controller to update all gobject properties that are under
* control with the current values based on timestamp.
* </para></listitem>
* </orderedlist>
*
* What needs to be done in applications?
* Again its not a lot to change.
* <orderedlist>
* <listitem><para>
* first put some properties under control, by calling
* controller = g_object_control_properties(object, "prop1", "prop2",...);
* </para></listitem>
* <listitem><para>
* set how the controller will smooth inbetween values.
* gst_controller_set_interpolation_mode(controller,"prop1",mode);
* </para></listitem>
* <listitem><para>
* set key values
* gst_controller_set (controller, "prop1" ,0 * GST_SECOND, value1);
* gst_controller_set (controller, "prop1" ,1 * GST_SECOND, value2);
* </para></listitem>
* <listitem><para>
* start your pipeline
* </para></listitem>
* </orderedlist>
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gstcontrollerprivate.h"
#include "gstcontroller.h"
#define GST_CAT_DEFAULT gst_controller_debug
GST_DEBUG_CATEGORY_EXTERN (GST_CAT_DEFAULT);
static GObjectClass *parent_class = NULL;
GQuark __gst_controller_key;
/* property ids */
enum
{
PROP_CONTROL_RATE = 1
};
struct _GstControllerPrivate
{
guint control_rate;
};
/* imports from gst-interpolation.c */
extern GList
* gst_controlled_property_find_timed_value_node (GstControlledProperty *
prop, GstClockTime timestamp);
extern GstInterpolateMethod *interpolation_methods[];
/* callbacks */
void
on_object_controlled_property_changed (const GObject * object, GParamSpec * arg,
gpointer user_data)
{
GstControlledProperty *prop = GST_CONTROLLED_PROPERTY (user_data);
GstController *ctrl;
GST_INFO ("notify for '%s'", prop->name);
ctrl = g_object_get_qdata (G_OBJECT (object), __gst_controller_key);
g_return_if_fail (ctrl);
if (g_mutex_trylock (ctrl->lock)) {
if (!G_IS_VALUE (&prop->live_value.value)) {
g_value_init (&prop->live_value.value, prop->type);
}
g_object_get_property (G_OBJECT (object), prop->name,
&prop->live_value.value);
prop->live_value.timestamp = prop->last_value.timestamp;
g_mutex_unlock (ctrl->lock);
GST_DEBUG ("-> is live update : ts=%" G_GUINT64_FORMAT,
prop->live_value.timestamp);
}
}
/* helper */
/*
* gst_timed_value_compare:
* @p1: a pointer to a #GstTimedValue
* @p2: a pointer to a #GstTimedValue
*
* Compare function for g_list operations that operates on two #GstTimedValue
* parameters.
*/
static gint
gst_timed_value_compare (gconstpointer p1, gconstpointer p2)
{
GstClockTime ct1 = ((GstTimedValue *) p1)->timestamp;
GstClockTime ct2 = ((GstTimedValue *) p2)->timestamp;
return ((ct1 < ct2) ? -1 : ((ct1 == ct2) ? 0 : 1));
/* this does not produce an gint :(
return ((ct1 - ct2));
*/
}
/*
* gst_timed_value_find:
* @p1: a pointer to a #GstTimedValue
* @p2: a pointer to a #GstClockTime
*
* Compare function for g_list operations that operates on a #GstTimedValue and
* a #GstClockTime.
*/
static gint
gst_timed_value_find (gconstpointer p1, gconstpointer p2)
{
GstClockTime ct1 = ((GstTimedValue *) p1)->timestamp;
GstClockTime ct2 = *(GstClockTime *) p2;
return ((ct1 < ct2) ? -1 : ((ct1 == ct2) ? 0 : 1));
/* this does not produce an gint :(
return ((ct1 - ct2));
*/
}
/*
* gst_controlled_property_set_interpolation_mode:
* @self: the controlled property object to change
* @mode: the new interpolation mode
*
* Sets the given Interpolation mode for the controlled property and activates
* the respective interpolation hooks.
*
* Returns: %TRUE for success
*/
static gboolean
gst_controlled_property_set_interpolation_mode (GstControlledProperty * self,
GstInterpolateMode mode)
{
gboolean res = TRUE;
self->interpolation = mode;
if (mode != GST_INTERPOLATE_USER) {
switch (self->base) {
case G_TYPE_INT:
self->get = interpolation_methods[mode]->get_int;
self->get_value_array =
interpolation_methods[mode]->get_int_value_array;
break;
case G_TYPE_UINT:
self->get = interpolation_methods[mode]->get_uint;
self->get_value_array =
interpolation_methods[mode]->get_uint_value_array;
break;
case G_TYPE_LONG:
self->get = interpolation_methods[mode]->get_long;
self->get_value_array =
interpolation_methods[mode]->get_long_value_array;
break;
case G_TYPE_ULONG:
self->get = interpolation_methods[mode]->get_ulong;
self->get_value_array =
interpolation_methods[mode]->get_ulong_value_array;
break;
case G_TYPE_FLOAT:
self->get = interpolation_methods[mode]->get_float;
self->get_value_array =
interpolation_methods[mode]->get_float_value_array;
break;
case G_TYPE_DOUBLE:
self->get = interpolation_methods[mode]->get_double;
self->get_value_array =
interpolation_methods[mode]->get_double_value_array;
break;
case G_TYPE_BOOLEAN:
self->get = interpolation_methods[mode]->get_boolean;
self->get_value_array =
interpolation_methods[mode]->get_boolean_value_array;
break;
case G_TYPE_ENUM:
self->get = interpolation_methods[mode]->get_uint;
self->get_value_array =
interpolation_methods[mode]->get_enum_value_array;
break;
case G_TYPE_STRING:
self->get = interpolation_methods[mode]->get_string;
self->get_value_array =
interpolation_methods[mode]->get_string_value_array;
break;
default:
self->get = NULL;
self->get_value_array = NULL;
}
if (!self->get) { /* || !self->get_value_array) */
GST_WARNING ("incomplete implementation for type %d/%d:'%s'/'%s'",
self->type, self->base,
g_type_name (self->type), g_type_name (self->base));
res = FALSE;
}
} else {
/* TODO shouldn't this also get a GstInterpolateMethod *user_method
for the case mode==GST_INTERPOLATE_USER
*/
res = FALSE;
}
return (res);
}
/*
* gst_controlled_property_new:
* @object: for which object the controlled property should be set up
* @name: the name of the property to be controlled
*
* Private method which initializes the fields of a new controlled property
* structure.
*
* Returns: a freshly allocated structure or %NULL
*/
static GstControlledProperty *
gst_controlled_property_new (GObject * object, const gchar * name)
{
GstControlledProperty *prop = NULL;
GParamSpec *pspec;
GST_INFO ("trying to put property '%s' under control", name);
/* check if the object has a property of that name */
if ((pspec =
g_object_class_find_property (G_OBJECT_GET_CLASS (object), name))) {
GST_DEBUG (" psec->flags : 0x%08x", pspec->flags);
/* check if this param is witable */
g_return_val_if_fail ((pspec->flags & G_PARAM_WRITABLE), NULL);
/* check if property is controlable */
g_return_val_if_fail ((pspec->flags & GST_PARAM_CONTROLLABLE), NULL);
/* check if this param is not construct-only */
g_return_val_if_fail (!(pspec->flags & G_PARAM_CONSTRUCT_ONLY), NULL);
/* TODO do sanity checks
we don't control some pspec->value_type:
G_TYPE_PARAM_BOXED
G_TYPE_PARAM_ENUM
G_TYPE_PARAM_FLAGS
G_TYPE_PARAM_OBJECT
G_TYPE_PARAM_PARAM
G_TYPE_PARAM_POINTER
G_TYPE_PARAM_STRING
*/
if ((prop = g_new0 (GstControlledProperty, 1))) {
gchar *signal_name;
GType base;
prop->name = pspec->name; /* so we don't use the same mem twice */
prop->type = G_PARAM_SPEC_VALUE_TYPE (pspec);
/* get the fundamental base type */
prop->base = prop->type;
while ((base = g_type_parent (prop->base))) {
prop->base = base;
}
/* initialize mode specific accessor callbacks */
if (!gst_controlled_property_set_interpolation_mode (prop,
GST_INTERPOLATE_NONE))
goto Error;
/* prepare our gvalues */
g_value_init (&prop->default_value, prop->type);
g_value_init (&prop->result_value, prop->type);
g_value_init (&prop->last_value.value, prop->type);
switch (prop->base) {
case G_TYPE_INT:{
GParamSpecInt *tpspec = G_PARAM_SPEC_INT (pspec);
g_value_set_int (&prop->default_value, tpspec->default_value);
}
break;
case G_TYPE_UINT:{
GParamSpecUInt *tpspec = G_PARAM_SPEC_UINT (pspec);
g_value_set_uint (&prop->default_value, tpspec->default_value);
}
break;
case G_TYPE_LONG:{
GParamSpecLong *tpspec = G_PARAM_SPEC_LONG (pspec);
g_value_set_long (&prop->default_value, tpspec->default_value);
}
break;
case G_TYPE_ULONG:{
GParamSpecULong *tpspec = G_PARAM_SPEC_ULONG (pspec);
g_value_set_ulong (&prop->default_value, tpspec->default_value);
}
break;
case G_TYPE_FLOAT:{
GParamSpecFloat *tpspec = G_PARAM_SPEC_FLOAT (pspec);
g_value_set_float (&prop->default_value, tpspec->default_value);
}
break;
case G_TYPE_DOUBLE:{
GParamSpecDouble *tpspec = G_PARAM_SPEC_DOUBLE (pspec);
g_value_set_double (&prop->default_value, tpspec->default_value);
}
break;
case G_TYPE_BOOLEAN:{
GParamSpecBoolean *tpspec = G_PARAM_SPEC_BOOLEAN (pspec);
g_value_set_boolean (&prop->default_value, tpspec->default_value);
}
break;
case G_TYPE_ENUM:{
GParamSpecEnum *tpspec = G_PARAM_SPEC_ENUM (pspec);
g_value_set_enum (&prop->default_value, tpspec->default_value);
}
break;
case G_TYPE_STRING:{
GParamSpecString *tpspec = G_PARAM_SPEC_STRING (pspec);
g_value_set_string (&prop->default_value, tpspec->default_value);
}
break;
default:
GST_WARNING ("incomplete implementation for paramspec type '%s'",
G_PARAM_SPEC_TYPE_NAME (pspec));
}
/* TODO what about adding a timedval with timestamp=0 and value=default
* a bit easier for interpolators, example:
* first timestamp is at 5
* requested value if for timestamp=3
* LINEAR and Co. would need to interpolate from default value to value
* at timestamp 5
*/
signal_name = g_alloca (8 + 1 + strlen (name));
g_sprintf (signal_name, "notify::%s", name);
prop->notify_handler_id =
g_signal_connect (object, signal_name,
G_CALLBACK (on_object_controlled_property_changed), (gpointer) prop);
}
} else {
GST_WARNING ("class '%s' has no property '%s'", G_OBJECT_TYPE_NAME (object),
name);
}
return (prop);
Error:
if (prop)
g_free (prop);
return (NULL);
}
/*
* gst_controlled_property_free:
* @prop: the object to free
*
* Private method which frees all data allocated by a #GstControlledProperty
* instance.
*/
static void
gst_controlled_property_free (GstControlledProperty * prop)
{
GList *node;
for (node = prop->values; node; node = g_list_next (node)) {
g_free (node->data);
}
g_list_free (prop->values);
g_free (prop);
}
/*
* gst_controller_find_controlled_property:
* @self: the controller object to search for a property in
* @name: the gobject property name to look for
*
* Searches the list of properties under control.
*
* Returns: a #GstControlledProperty object of %NULL if the property is not
* being controlled.
*/
static GstControlledProperty *
gst_controller_find_controlled_property (GstController * self,
const gchar * name)
{
GstControlledProperty *prop;
GList *node;
for (node = self->properties; node; node = g_list_next (node)) {
prop = node->data;
if (!strcmp (prop->name, name)) {
return (prop);
}
}
GST_DEBUG ("controller does not (yet) manage property '%s'", name);
return (NULL);
}
/* methods */
/**
* gst_controller_new_valist:
* @object: the object of which some properties should be controlled
* @var_args: %NULL terminated list of property names that should be controlled
*
* Creates a new GstController for the given object's properties
*
* Returns: the new controller.
* Since: 0.9
*/
GstController *
gst_controller_new_valist (GObject * object, va_list var_args)
{
GstController *self;
GstControlledProperty *prop;
gchar *name;
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
GST_INFO ("setting up a new controller");
/* TODO should this method check if the given object implements GstParent and
if so instantiate a GstParentController ?
BilboEd: This is too specific to be put here, don't we want
GstController to be as generic as possible ?
Ensonic: So we will have gst_parent_controller_new as well and maybe a
convinience function that automatically chooses the right one (how to name it)?
GstParent will be in core after all.
*/
self = g_object_get_qdata (object, __gst_controller_key);
/* create GstControlledProperty for each property */
while ((name = va_arg (var_args, gchar *))) {
/* test if this property isn't yet controlled */
if (!self || !(prop = gst_controller_find_controlled_property (self, name))) {
/* create GstControlledProperty and add to self->propeties List */
if ((prop = gst_controlled_property_new (object, name))) {
/* if we don't have a controller object yet, now is the time to create one */
if (!self) {
self = g_object_new (GST_TYPE_CONTROLLER, NULL);
self->object = object;
/* store the controller */
g_object_set_qdata (object, __gst_controller_key, self);
} else {
GST_INFO ("returning existing controller");
}
self->properties = g_list_prepend (self->properties, prop);
}
} else {
GST_WARNING ("trying to control property again");
}
}
va_end (var_args);
if (self)
GST_INFO ("controller->ref_count=%d", G_OBJECT (self)->ref_count);
return (self);
}
/**
* gst_controller_new_list:
* @object: the object of which some properties should be controlled
* @list: list of property names that should be controlled
*
* Creates a new GstController for the given object's properties
*
* Returns: the new controller.
* Since: 0.9
*/
GstController *
gst_controller_new_list (GObject * object, GList * list)
{
GstController *self;
GstControlledProperty *prop;
gchar *name;
GList *node;
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
GST_INFO ("setting up a new controller");
self = g_object_get_qdata (object, __gst_controller_key);
/* create GstControlledProperty for each property */
for (node = list; node; node = g_list_next (node)) {
name = (gchar *) node->data;
/* test if this property isn't yet controlled */
if (!self || !(prop = gst_controller_find_controlled_property (self, name))) {
/* create GstControlledProperty and add to self->propeties List */
if ((prop = gst_controlled_property_new (object, name))) {
/* if we don't have a controller object yet, now is the time to create one */
if (!self) {
self = g_object_new (GST_TYPE_CONTROLLER, NULL);
self->object = object;
/* store the controller */
g_object_set_qdata (object, __gst_controller_key, self);
} else {
GST_INFO ("returning existing controller");
}
self->properties = g_list_prepend (self->properties, prop);
}
} else {
GST_WARNING ("trying to control property again");
}
}
if (self)
GST_INFO ("controller->ref_count=%d", G_OBJECT (self)->ref_count);
return (self);
}
/**
* gst_controller_new:
* @object: the object of which some properties should be controlled
* @...: %NULL terminated list of property names that should be controlled
*
* Creates a new GstController for the given object's properties
*
* Returns: the new controller.
* Since: 0.9
*/
GstController *
gst_controller_new (GObject * object, ...)
{
GstController *self;
va_list var_args;
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
va_start (var_args, object);
self = gst_controller_new_valist (object, var_args);
va_end (var_args);
return (self);
}
/**
* gst_controller_remove_properties_valist:
* @self: the controller object from which some properties should be removed
* @var_args: %NULL terminated list of property names that should be removed
*
* Removes the given object properties from the controller
*
* Returns: %FALSE if one of the given property isn't handled by the controller, %TRUE otherwise
* Since: 0.9
*/
gboolean
gst_controller_remove_properties_valist (GstController * self, va_list var_args)
{
gboolean res = TRUE;
GstControlledProperty *prop;
gchar *name;
g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE);
while ((name = va_arg (var_args, gchar *))) {
/* find the property in the properties list of the controller, remove and free it */
g_mutex_lock (self->lock);
if ((prop = gst_controller_find_controlled_property (self, name))) {
self->properties = g_list_remove (self->properties, prop);
g_signal_handler_disconnect (self->object, prop->notify_handler_id);
gst_controlled_property_free (prop);
} else {
res = FALSE;
}
g_mutex_unlock (self->lock);
}
return (res);
}
/**
* gst_controller_remove_properties_list:
* @self: the controller object from which some properties should be removed
* @list: #GList of property names that should be removed
*
* Removes the given object properties from the controller
*
* Returns: %FALSE if one of the given property isn't handled by the controller, %TRUE otherwise
* Since: 0.9
*/
gboolean
gst_controller_remove_properties_list (GstController * self, GList * list)
{
gboolean res = TRUE;
GstControlledProperty *prop;
gchar *name;
GList *tmp;
g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE);
for (tmp = list; tmp; tmp = g_list_next (tmp)) {
name = (gchar *) tmp->data;
/* find the property in the properties list of the controller, remove and free it */
g_mutex_lock (self->lock);
if ((prop = gst_controller_find_controlled_property (self, name))) {
self->properties = g_list_remove (self->properties, prop);
g_signal_handler_disconnect (self->object, prop->notify_handler_id);
gst_controlled_property_free (prop);
} else {
res = FALSE;
}
g_mutex_unlock (self->lock);
}
return (res);
}
/**
* gst_controller_remove_properties:
* @self: the controller object from which some properties should be removed
* @...: %NULL terminated list of property names that should be removed
*
* Removes the given object properties from the controller
*
* Returns: %FALSE if one of the given property isn't handled by the controller, %TRUE otherwise
* Since: 0.9
*/
gboolean
gst_controller_remove_properties (GstController * self, ...)
{
gboolean res;
va_list var_args;
g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE);
va_start (var_args, self);
res = gst_controller_remove_properties_valist (self, var_args);
va_end (var_args);
return (res);
}
/**
* gst_controller_set:
* @self: the controller object which handles the properties
* @property_name: the name of the property to set
* @timestamp: the time the control-change is schedules for
* @value: the control-value
*
* Set the value of given controller-handled property at a certain time.
*
* Returns: FALSE if the values couldn't be set (ex : properties not handled by controller), TRUE otherwise
* Since: 0.9
*/
gboolean
gst_controller_set (GstController * self, gchar * property_name,
GstClockTime timestamp, GValue * value)
{
gboolean res = FALSE;
GstControlledProperty *prop;
g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE);
g_return_val_if_fail (property_name, FALSE);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE);
g_return_val_if_fail (G_IS_VALUE (value), FALSE);
g_mutex_lock (self->lock);
if ((prop = gst_controller_find_controlled_property (self, property_name))) {
if (G_VALUE_TYPE (value) == prop->type) {
GstTimedValue *tv;
GList *node;
/* check if a timed_value for the timestamp already exists */
if ((node = g_list_find_custom (prop->values, &timestamp,
gst_timed_value_find))) {
tv = node->data;
memcpy (&tv->value, value, sizeof (GValue));
} else {
/* create a new GstTimedValue */
tv = g_new (GstTimedValue, 1);
tv->timestamp = timestamp;
memcpy (&tv->value, value, sizeof (GValue));
/* and sort it into the prop->values list */
prop->values =
g_list_insert_sorted (prop->values, tv, gst_timed_value_compare);
}
res = TRUE;
} else {
GST_WARNING ("incompatible value type for property '%s'", prop->name);
}
}
g_mutex_unlock (self->lock);
return (res);
}
/**
* gst_controller_set_from_list:
* @self: the controller object which handles the properties
* @property_name: the name of the property to set
* @timedvalues: a list with #GstTimedValue items
*
* Sets multiple timed values at once.
*
* Returns: %FALSE if the values couldn't be set (ex : properties not handled by controller), %TRUE otherwise
* Since: 0.9
*/
gboolean
gst_controller_set_from_list (GstController * self, gchar * property_name,
GSList * timedvalues)
{
gboolean res = FALSE;
GstControlledProperty *prop;
GSList *node;
GstTimedValue *tv;
g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE);
g_return_val_if_fail (property_name, FALSE);
g_mutex_lock (self->lock);
if ((prop = gst_controller_find_controlled_property (self, property_name))) {
for (node = timedvalues; node; node = g_slist_next (node)) {
tv = node->data;
if (G_VALUE_TYPE (&tv->value) == prop->type) {
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (tv->timestamp), FALSE);
/* TODO copy the timed value or just link in? */
prop->values =
g_list_insert_sorted (prop->values, tv, gst_timed_value_compare);
res = TRUE;
} else {
GST_WARNING ("incompatible value type for property '%s'", prop->name);
}
}
}
g_mutex_unlock (self->lock);
return (res);
}
/**
* gst_controller_unset:
* @self: the controller object which handles the properties
* @property_name: the name of the property to unset
* @timestamp: the time the control-change should be removed from
*
* Used to remove the value of given controller-handled property at a certain
* time.
*
* Returns: %FALSE if the values couldn't be unset (ex : properties not handled by controller), %TRUE otherwise
* Since: 0.9
*/
gboolean
gst_controller_unset (GstController * self, gchar * property_name,
GstClockTime timestamp)
{
gboolean res = FALSE;
GstControlledProperty *prop;
g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE);
g_return_val_if_fail (property_name, FALSE);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE);
g_mutex_lock (self->lock);
if ((prop = gst_controller_find_controlled_property (self, property_name))) {
GList *node;
/* check if a timed_value for the timestamp exists */
if ((node = g_list_find_custom (prop->values, &timestamp,
gst_timed_value_find))) {
g_free (node->data); /* free GstTimedValue */
prop->values = g_list_delete_link (prop->values, node);
res = TRUE;
}
}
g_mutex_unlock (self->lock);
return (res);
}
/**
* gst_controller_unset_all:
* @self: the controller object which handles the properties
* @property_name: the name of the property to unset
*
* Used to remove all time-stamped values of given controller-handled property
*
* Returns: %FALSE if the values couldn't be unset (ex : properties not handled
* by controller), %TRUE otherwise
* Since: 0.10.5
*/
gboolean
gst_controller_unset_all (GstController * self, gchar * property_name)
{
gboolean res = FALSE;
GstControlledProperty *prop;
g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE);
g_return_val_if_fail (property_name, FALSE);
g_mutex_lock (self->lock);
if ((prop = gst_controller_find_controlled_property (self, property_name))) {
/* free GstTimedValue structures */
g_list_foreach (prop->values, (GFunc) g_free, NULL);
g_list_free (prop->values);
prop->values = NULL;
res = TRUE;
}
g_mutex_unlock (self->lock);
return (res);
}
/**
* gst_controller_get:
* @self: the controller object which handles the properties
* @property_name: the name of the property to get
* @timestamp: the time the control-change should be read from
*
* Gets the value for the given controller-handled property at the requested
* time.
*
* Returns: the GValue of the property at the given time, or %NULL if the property isn't handled by the controller
* Since: 0.9
*/
GValue *
gst_controller_get (GstController * self, gchar * property_name,
GstClockTime timestamp)
{
GstControlledProperty *prop;
GValue *val = NULL;
g_return_val_if_fail (GST_IS_CONTROLLER (self), NULL);
g_return_val_if_fail (property_name, NULL);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), NULL);
g_mutex_lock (self->lock);
if ((prop = gst_controller_find_controlled_property (self, property_name))) {
/* get current value via interpolator */
val = prop->get (prop, timestamp);
}
g_mutex_unlock (self->lock);
return (val);
}
/**
* gst_controller_get_all:
* @self: the controller to get the list from
* @property_name: the name of the property to get the list for
*
* Returns a read-only copy of the list of GstTimedValue for the given property.
* Free the list after done with it.
*
* Returns: a copy of the list, or %NULL if the property isn't handled by the controller
* Since: 0.9
*/
const GList *
gst_controller_get_all (GstController * self, gchar * property_name)
{
GList *res = NULL;
GstControlledProperty *prop;
g_return_val_if_fail (GST_IS_CONTROLLER (self), NULL);
g_return_val_if_fail (property_name, NULL);
g_mutex_lock (self->lock);
if ((prop = gst_controller_find_controlled_property (self, property_name))) {
res = g_list_copy (prop->values);
}
g_mutex_unlock (self->lock);
return (res);
}
/**
* gst_controller_sync_values:
* @self: the controller that handles the values
* @timestamp: the time that should be processed
*
* Sets the properties of the element, according to the controller that (maybe)
* handles them and for the given timestamp.
*
* Returns: %TRUE if the controller values could be applied to the object
* properties, %FALSE otherwise
* Since: 0.9
*/
gboolean
gst_controller_sync_values (GstController * self, GstClockTime timestamp)
{
GstControlledProperty *prop;
GList *node;
GValue *value;
gboolean live;
g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE);
GST_INFO ("sync_values");
g_mutex_lock (self->lock);
/* go over the controlled properties of the controller */
for (node = self->properties; node; node = g_list_next (node)) {
prop = node->data;
GST_DEBUG (" property '%s' at ts=%" G_GUINT64_FORMAT, prop->name,
timestamp);
live = FALSE;
if (G_UNLIKELY (G_IS_VALUE (&prop->live_value.value))) {
GList *lnode =
gst_controlled_property_find_timed_value_node (prop, timestamp);
if (G_UNLIKELY (!lnode)) {
GST_DEBUG (" no control changes in the queue");
live = TRUE;
} else {
GstTimedValue *tv = lnode->data;
if (prop->live_value.timestamp < tv->timestamp) {
g_value_unset (&prop->live_value.value);
GST_DEBUG (" live value resetted");
} else if (prop->live_value.timestamp < timestamp) {
live = TRUE;
}
}
}
if (G_LIKELY (!live)) {
/* get current value via interpolator */
value = prop->get (prop, timestamp);
prop->last_value.timestamp = timestamp;
g_value_copy (value, &prop->last_value.value);
g_object_set_property (self->object, prop->name, value);
}
}
g_mutex_unlock (self->lock);
/* TODO what can here go wrong, to return FALSE ?
BilboEd : Nothing I guess, as long as all the checks are made when creating the controller,
adding/removing controlled properties, etc...
*/
return (TRUE);
}
/**
* gst_controller_get_value_arrays:
* @self: the controller that handles the values
* @timestamp: the time that should be processed
* @value_arrays: list to return the control-values in
*
* Function to be able to get an array of values for one or more given element
* properties.
*
* If the GstValueArray->values array in list nodes is NULL, it will be created
* by the function.
* The type of the values in the array are the same as the property's type.
*
* Returns: %TRUE if the given array(s) could be filled, %FALSE otherwise
* Since: 0.9
*/
gboolean
gst_controller_get_value_arrays (GstController * self,
GstClockTime timestamp, GSList * value_arrays)
{
gboolean res = TRUE;
GSList *node;
g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE);
g_return_val_if_fail (value_arrays, FALSE);
for (node = value_arrays; (res && node); node = g_slist_next (node)) {
res = gst_controller_get_value_array (self, timestamp, node->data);
}
return (res);
}
/**
* gst_controller_get_value_array:
* @self: the controller that handles the values
* @timestamp: the time that should be processed
* @value_array: array to put control-values in
*
* Function to be able to get an array of values for one element properties
*
* If the GstValueArray->values array is NULL, it will be created by the function.
* The type of the values in the array are the same as the property's type.
*
* Returns: %TRUE if the given array(s) could be filled, %FALSE otherwise
* Since: 0.9
*/
gboolean
gst_controller_get_value_array (GstController * self, GstClockTime timestamp,
GstValueArray * value_array)
{
gboolean res = FALSE;
GstControlledProperty *prop;
g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE);
g_return_val_if_fail (value_array, FALSE);
g_return_val_if_fail (value_array->property_name, FALSE);
/* TODO and if GstValueArray->values is not NULL, the caller is resposible that
is is big enough for nbsamples values, right?
*/
g_mutex_lock (self->lock);
if ((prop =
gst_controller_find_controlled_property (self,
value_array->property_name))) {
if (!value_array->values) {
/* TODO from where to get the base size
value_array->values=g_new(sizeof(???),nbsamples);
*/
}
/* get current value_array via interpolator */
res = prop->get_value_array (prop, timestamp, value_array);
}
g_mutex_unlock (self->lock);
return (res);
}
/**
* gst_controller_set_interpolation_mode:
* @self: the controller object
* @property_name: the name of the property for which to change the interpolation
* @mode: interpolation mode
*
* Sets the given interpolation mode on the given property.
*
* Returns: %TRUE if the property is handled by the controller, %FALSE otherwise
* Since: 0.9
*/
gboolean
gst_controller_set_interpolation_mode (GstController * self,
gchar * property_name, GstInterpolateMode mode)
{
gboolean res = FALSE;
GstControlledProperty *prop;
g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE);
g_return_val_if_fail (property_name, FALSE);
g_mutex_lock (self->lock);
if ((prop = gst_controller_find_controlled_property (self, property_name))) {
/* TODO shouldn't this also get a GstInterpolateMethod *user_method
for the case mode==GST_INTERPOLATE_USER
*/
gst_controlled_property_set_interpolation_mode (prop, mode);
res = TRUE;
}
g_mutex_unlock (self->lock);
return (res);
}
/*
void
gst_controller_set_live_value(GstController * self, gchar *property_name,
GstClockTime timestamp, GValue *value)
{
GstControlledProperty *prop;
g_return_if_fail (GST_IS_CONTROLLER (self));
g_return_if_fail (property_name);
g_mutex_lock (self->lock);
if ((prop = gst_controller_find_controlled_property (self, property_name))) {
g_value_unset (&prop->live_value.value);
g_value_init (&prop->live_value.value, prop->type);
g_value_copy (value, &prop->live_value.value);
prop->live_value.timestamp = timestamp;
}
g_mutex_unlock (self->lock);
}
*/
/* gobject handling */
static void
_gst_controller_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstController *self = GST_CONTROLLER (object);
switch (property_id) {
case PROP_CONTROL_RATE:{
/* FIXME: don't change if element is playing, controller works for GObject
so this wont work
GstState c_state, p_state;
GstStateChangeReturn ret;
ret = gst_element_get_state (self->object, &c_state, &p_state, 0);
if ((ret == GST_STATE_CHANGE_SUCCESS &&
(c_state == GST_STATE_NULL || c_state == GST_STATE_READY)) ||
(ret == GST_STATE_CHANGE_ASYNC &&
(p_state == GST_STATE_NULL || p_state == GST_STATE_READY))) {
*/
g_value_set_uint (value, self->priv->control_rate);
/*
}
else {
GST_WARNING ("Changing the control rate is only allowed if the elemnt"
" is in NULL or READY");
}
*/
}
break;
default:{
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
break;
}
}
/* sets the given properties for this object */
static void
_gst_controller_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstController *self = GST_CONTROLLER (object);
switch (property_id) {
case PROP_CONTROL_RATE:{
self->priv->control_rate = g_value_get_uint (value);
}
break;
default:{
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
break;
}
}
static void
_gst_controller_finalize (GObject * object)
{
GstController *self = GST_CONTROLLER (object);
GList *node;
GstControlledProperty *prop;
/* free list of properties */
if (self->properties) {
for (node = self->properties; node; node = g_list_next (node)) {
prop = node->data;
g_signal_handler_disconnect (self->object, prop->notify_handler_id);
gst_controlled_property_free (prop);
}
g_list_free (self->properties);
self->properties = NULL;
}
g_mutex_free (self->lock);
/* remove controller from objects qdata list */
g_object_set_qdata (self->object, __gst_controller_key, NULL);
if (G_OBJECT_CLASS (parent_class)->finalize)
(G_OBJECT_CLASS (parent_class)->finalize) (object);
}
static void
_gst_controller_init (GTypeInstance * instance, gpointer g_class)
{
GstController *self = GST_CONTROLLER (instance);
self->lock = g_mutex_new ();
self->priv =
G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_CONTROLLER,
GstControllerPrivate);
}
static void
_gst_controller_class_init (GstControllerClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
g_type_class_add_private (klass, sizeof (GstControllerPrivate));
gobject_class->set_property = _gst_controller_set_property;
gobject_class->get_property = _gst_controller_get_property;
gobject_class->finalize = _gst_controller_finalize;
__gst_controller_key = g_quark_from_string ("gst::controller");
/* register properties */
g_object_class_install_property (gobject_class, PROP_CONTROL_RATE,
g_param_spec_uint ("control-rate",
"control rate",
"Controlled properties will be updated this many times per second",
1, G_MAXUINT, 10, G_PARAM_READWRITE));
/* register signals */
/* set defaults for overridable methods */
}
GType
gst_controller_get_type (void)
{
static GType type = 0;
if (type == 0) {
static const GTypeInfo info = {
sizeof (GstControllerClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) _gst_controller_class_init, /* class_init */
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GstController),
0, /* n_preallocs */
(GInstanceInitFunc) _gst_controller_init, /* instance_init */
NULL /* value_table */
};
type = g_type_register_static (G_TYPE_OBJECT, "GstController", &info, 0);
}
return type;
}