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gstreamer/libs/gst/controller/gstdirectcontrolbinding.c
Tim-Philipp Müller 57c8e0146f libs: figure out right export define in configure 
Add new GST_API_EXPORT in config.h and use that for GST_*_API
decorators instead of GST_EXPORT.

The right export define depends on the toolchain and whether
we're using -fvisibility=hidden or not, so it's better to set it
to the right thing directly than hard-coding a compiler whitelist
in the public header.

We put the export define into config.h instead of passing it via the
command line to the compiler because it might contain spaces and brackets
and in the autotools scenario we'd have to pass that through multiple
layers of plumbing and Makefile/shell escaping and we're just not going
to be *that* lucky.

The export define is only used if we're compiling our lib, not by external
users of the lib headers, so it's not a problem to put it into config.h

Also, this means all .c files of libs need to include config.h
to get the export marker defined, so fix up a few that didn't
include config.h.

This commit depends on a common submodule commit that makes gst-glib-gen.mak
add an #include "config.h" to generated enum/marshal .c files for the
autotools build.

https://bugzilla.gnome.org/show_bug.cgi?id=797185
2018-09-24 08:39:37 +01:00

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/* GStreamer
*
* Copyright (C) 2011 Stefan Sauer <ensonic@users.sf.net>
*
* gstdirectcontrolbinding.c: Direct attachment for control sources
*
* 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:gstdirectcontrolbinding
* @title: GstDirectControlBinding
* @short_description: direct attachment for control sources
*
* A value mapping object that attaches control sources to gobject properties. It
* will map the control values directly to the target property range. If a
* non-absolute direct control binding is used, the value range [0.0 ... 1.0]
* is mapped to full target property range, and all values outside the range
* will be clipped. An absolute control binding will not do any value
* transformations.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib-object.h>
#include <gst/gst.h>
#include "gstdirectcontrolbinding.h"
#include <gst/math-compat.h>
#define GST_CAT_DEFAULT control_binding_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
static GObject *gst_direct_control_binding_constructor (GType type,
guint n_construct_params, GObjectConstructParam * construct_params);
static void gst_direct_control_binding_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_direct_control_binding_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_direct_control_binding_dispose (GObject * object);
static void gst_direct_control_binding_finalize (GObject * object);
static gboolean gst_direct_control_binding_sync_values (GstControlBinding *
_self, GstObject * object, GstClockTime timestamp, GstClockTime last_sync);
static GValue *gst_direct_control_binding_get_value (GstControlBinding * _self,
GstClockTime timestamp);
static gboolean gst_direct_control_binding_get_value_array (GstControlBinding *
_self, GstClockTime timestamp, GstClockTime interval, guint n_values,
gpointer values);
static gboolean gst_direct_control_binding_get_g_value_array (GstControlBinding
* _self, GstClockTime timestamp, GstClockTime interval, guint n_values,
GValue * values);
#define _do_init \
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "gstdirectcontrolbinding", 0, \
"dynamic parameter control source attachment");
#define gst_direct_control_binding_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstDirectControlBinding, gst_direct_control_binding,
GST_TYPE_CONTROL_BINDING, _do_init);
enum
{
PROP_0,
PROP_CS,
PROP_ABSOLUTE,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
/* mapping functions */
#define DEFINE_CONVERT(type,Type,TYPE,ROUNDING_OP) \
static void \
convert_g_value_to_##type (GstDirectControlBinding *self, gdouble s, GValue *d) \
{ \
GParamSpec##Type *pspec = G_PARAM_SPEC_##TYPE (((GstControlBinding *)self)->pspec); \
g##type v; \
\
s = CLAMP (s, 0.0, 1.0); \
v = (g##type) ROUNDING_OP (pspec->minimum * (1-s)) + (g##type) ROUNDING_OP (pspec->maximum * s); \
g_value_set_##type (d, v); \
} \
\
static void \
convert_value_to_##type (GstDirectControlBinding *self, gdouble s, gpointer d_) \
{ \
GParamSpec##Type *pspec = G_PARAM_SPEC_##TYPE (((GstControlBinding *)self)->pspec); \
g##type *d = (g##type *)d_; \
\
s = CLAMP (s, 0.0, 1.0); \
*d = (g##type) ROUNDING_OP (pspec->minimum * (1-s)) + (g##type) ROUNDING_OP (pspec->maximum * s); \
} \
\
static void \
abs_convert_g_value_to_##type (GstDirectControlBinding *self, gdouble s, GValue *d) \
{ \
g##type v; \
v = (g##type) ROUNDING_OP (s); \
g_value_set_##type (d, v); \
} \
\
static void \
abs_convert_value_to_##type (GstDirectControlBinding *self, gdouble s, gpointer d_) \
{ \
g##type *d = (g##type *)d_; \
*d = (g##type) ROUNDING_OP (s); \
}
DEFINE_CONVERT (int, Int, INT, rint);
DEFINE_CONVERT (uint, UInt, UINT, rint);
DEFINE_CONVERT (long, Long, LONG, rint);
DEFINE_CONVERT (ulong, ULong, ULONG, rint);
DEFINE_CONVERT (int64, Int64, INT64, rint);
DEFINE_CONVERT (uint64, UInt64, UINT64, rint);
DEFINE_CONVERT (float, Float, FLOAT, /*NOOP*/);
DEFINE_CONVERT (double, Double, DOUBLE, /*NOOP*/);
static void
convert_g_value_to_boolean (GstDirectControlBinding * self, gdouble s,
GValue * d)
{
s = CLAMP (s, 0.0, 1.0);
g_value_set_boolean (d, (gboolean) (s + 0.5));
}
static void
convert_value_to_boolean (GstDirectControlBinding * self, gdouble s,
gpointer d_)
{
gboolean *d = (gboolean *) d_;
s = CLAMP (s, 0.0, 1.0);
*d = (gboolean) (s + 0.5);
}
static void
convert_g_value_to_enum (GstDirectControlBinding * self, gdouble s, GValue * d)
{
GParamSpecEnum *pspec =
G_PARAM_SPEC_ENUM (((GstControlBinding *) self)->pspec);
GEnumClass *e = pspec->enum_class;
gint v;
s = CLAMP (s, 0.0, 1.0);
v = s * (e->n_values - 1);
g_value_set_enum (d, e->values[v].value);
}
static void
convert_value_to_enum (GstDirectControlBinding * self, gdouble s, gpointer d_)
{
GParamSpecEnum *pspec =
G_PARAM_SPEC_ENUM (((GstControlBinding *) self)->pspec);
GEnumClass *e = pspec->enum_class;
gint *d = (gint *) d_;
s = CLAMP (s, 0.0, 1.0);
*d = e->values[(gint) (s * (e->n_values - 1))].value;
}
/* vmethods */
static void
gst_direct_control_binding_class_init (GstDirectControlBindingClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstControlBindingClass *control_binding_class =
GST_CONTROL_BINDING_CLASS (klass);
gobject_class->constructor = gst_direct_control_binding_constructor;
gobject_class->set_property = gst_direct_control_binding_set_property;
gobject_class->get_property = gst_direct_control_binding_get_property;
gobject_class->dispose = gst_direct_control_binding_dispose;
gobject_class->finalize = gst_direct_control_binding_finalize;
control_binding_class->sync_values = gst_direct_control_binding_sync_values;
control_binding_class->get_value = gst_direct_control_binding_get_value;
control_binding_class->get_value_array =
gst_direct_control_binding_get_value_array;
control_binding_class->get_g_value_array =
gst_direct_control_binding_get_g_value_array;
properties[PROP_CS] =
g_param_spec_object ("control-source", "ControlSource",
"The control source",
GST_TYPE_CONTROL_SOURCE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS);
properties[PROP_ABSOLUTE] =
g_param_spec_boolean ("absolute", "Absolute",
"Whether the control values are absolute",
FALSE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (gobject_class, PROP_LAST, properties);
}
static void
gst_direct_control_binding_init (GstDirectControlBinding * self)
{
}
static GObject *
gst_direct_control_binding_constructor (GType type, guint n_construct_params,
GObjectConstructParam * construct_params)
{
GstDirectControlBinding *self;
self =
GST_DIRECT_CONTROL_BINDING (G_OBJECT_CLASS (parent_class)->constructor
(type, n_construct_params, construct_params));
if (GST_CONTROL_BINDING_PSPEC (self)) {
GType type, base;
base = type = G_PARAM_SPEC_VALUE_TYPE (GST_CONTROL_BINDING_PSPEC (self));
g_value_init (&self->cur_value, type);
while ((type = g_type_parent (type)))
base = type;
GST_DEBUG (" using type %s", g_type_name (base));
/* select mapping function */
#define SET_CONVERT_FUNCTION(type) \
if (self->ABI.abi.want_absolute) { \
self->convert_g_value = abs_convert_g_value_to_##type; \
self->convert_value = abs_convert_value_to_##type; \
} \
else { \
self->convert_g_value = convert_g_value_to_##type; \
self->convert_value = convert_value_to_##type; \
} \
self->byte_size = sizeof (g##type);
switch (base) {
case G_TYPE_INT:
SET_CONVERT_FUNCTION (int);
break;
case G_TYPE_UINT:
SET_CONVERT_FUNCTION (uint);
break;
case G_TYPE_LONG:
SET_CONVERT_FUNCTION (long);
break;
case G_TYPE_ULONG:
SET_CONVERT_FUNCTION (ulong);
break;
case G_TYPE_INT64:
SET_CONVERT_FUNCTION (int64);
break;
case G_TYPE_UINT64:
SET_CONVERT_FUNCTION (uint64);
break;
case G_TYPE_FLOAT:
SET_CONVERT_FUNCTION (float);
break;
case G_TYPE_DOUBLE:
SET_CONVERT_FUNCTION (double);
break;
case G_TYPE_BOOLEAN:
self->convert_g_value = convert_g_value_to_boolean;
self->convert_value = convert_value_to_boolean;
self->byte_size = sizeof (gboolean);
break;
case G_TYPE_ENUM:
self->convert_g_value = convert_g_value_to_enum;
self->convert_value = convert_value_to_enum;
self->byte_size = sizeof (gint);
break;
default:
GST_WARNING ("incomplete implementation for paramspec type '%s'",
G_PARAM_SPEC_TYPE_NAME (GST_CONTROL_BINDING_PSPEC (self)));
GST_CONTROL_BINDING_PSPEC (self) = NULL;
break;
}
}
return (GObject *) self;
}
static void
gst_direct_control_binding_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDirectControlBinding *self = GST_DIRECT_CONTROL_BINDING (object);
switch (prop_id) {
case PROP_CS:
self->cs = g_value_dup_object (value);
break;
case PROP_ABSOLUTE:
self->ABI.abi.want_absolute = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_direct_control_binding_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstDirectControlBinding *self = GST_DIRECT_CONTROL_BINDING (object);
switch (prop_id) {
case PROP_CS:
g_value_set_object (value, self->cs);
break;
case PROP_ABSOLUTE:
g_value_set_boolean (value, self->ABI.abi.want_absolute);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_direct_control_binding_dispose (GObject * object)
{
GstDirectControlBinding *self = GST_DIRECT_CONTROL_BINDING (object);
if (self->cs)
gst_object_replace ((GstObject **) & self->cs, NULL);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_direct_control_binding_finalize (GObject * object)
{
GstDirectControlBinding *self = GST_DIRECT_CONTROL_BINDING (object);
if (G_IS_VALUE (&self->cur_value))
g_value_unset (&self->cur_value);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_direct_control_binding_sync_values (GstControlBinding * _self,
GstObject * object, GstClockTime timestamp, GstClockTime last_sync)
{
GstDirectControlBinding *self = GST_DIRECT_CONTROL_BINDING (_self);
gdouble src_val;
gboolean ret;
g_return_val_if_fail (GST_IS_DIRECT_CONTROL_BINDING (self), FALSE);
g_return_val_if_fail (GST_CONTROL_BINDING_PSPEC (self), FALSE);
GST_LOG_OBJECT (object, "property '%s' at ts=%" GST_TIME_FORMAT,
_self->name, GST_TIME_ARGS (timestamp));
ret = gst_control_source_get_value (self->cs, timestamp, &src_val);
if (G_LIKELY (ret)) {
GST_LOG_OBJECT (object, " new value %lf", src_val);
/* always set the value for first time, but then only if it changed
* this should limit g_object_notify invocations.
* FIXME: can we detect negative playback rates?
*/
if ((timestamp < last_sync) || (src_val != self->last_value)) {
GValue *dst_val = &self->cur_value;
GST_LOG_OBJECT (object, " mapping %s to value of type %s", _self->name,
G_VALUE_TYPE_NAME (dst_val));
/* run mapping function to convert gdouble to GValue */
self->convert_g_value (self, src_val, dst_val);
/* we can make this faster
* http://bugzilla.gnome.org/show_bug.cgi?id=536939
*/
g_object_set_property ((GObject *) object, _self->name, dst_val);
self->last_value = src_val;
}
} else {
GST_DEBUG_OBJECT (object, "no control value for param %s", _self->name);
}
return (ret);
}
static GValue *
gst_direct_control_binding_get_value (GstControlBinding * _self,
GstClockTime timestamp)
{
GstDirectControlBinding *self = GST_DIRECT_CONTROL_BINDING (_self);
GValue *dst_val = NULL;
gdouble src_val;
g_return_val_if_fail (GST_IS_DIRECT_CONTROL_BINDING (self), NULL);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), NULL);
g_return_val_if_fail (GST_CONTROL_BINDING_PSPEC (self), FALSE);
/* get current value via control source */
if (gst_control_source_get_value (self->cs, timestamp, &src_val)) {
dst_val = g_new0 (GValue, 1);
g_value_init (dst_val, G_PARAM_SPEC_VALUE_TYPE (_self->pspec));
self->convert_g_value (self, src_val, dst_val);
} else {
GST_LOG ("no control value for property %s at ts %" GST_TIME_FORMAT,
_self->name, GST_TIME_ARGS (timestamp));
}
return dst_val;
}
static gboolean
gst_direct_control_binding_get_value_array (GstControlBinding * _self,
GstClockTime timestamp, GstClockTime interval, guint n_values,
gpointer values_)
{
GstDirectControlBinding *self = GST_DIRECT_CONTROL_BINDING (_self);
gint i;
gdouble *src_val;
gboolean res = FALSE;
GstDirectControlBindingConvertValue convert;
gint byte_size;
guint8 *values = (guint8 *) values_;
g_return_val_if_fail (GST_IS_DIRECT_CONTROL_BINDING (self), FALSE);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (interval), FALSE);
g_return_val_if_fail (values, FALSE);
g_return_val_if_fail (GST_CONTROL_BINDING_PSPEC (self), FALSE);
convert = self->convert_value;
byte_size = self->byte_size;
src_val = g_new0 (gdouble, n_values);
if ((res = gst_control_source_get_value_array (self->cs, timestamp,
interval, n_values, src_val))) {
for (i = 0; i < n_values; i++) {
/* we will only get NAN for sparse control sources, such as triggers */
if (!isnan (src_val[i])) {
convert (self, src_val[i], (gpointer) values);
} else {
GST_LOG ("no control value for property %s at index %d", _self->name,
i);
}
values += byte_size;
}
} else {
GST_LOG ("failed to get control value for property %s at ts %"
GST_TIME_FORMAT, _self->name, GST_TIME_ARGS (timestamp));
}
g_free (src_val);
return res;
}
static gboolean
gst_direct_control_binding_get_g_value_array (GstControlBinding * _self,
GstClockTime timestamp, GstClockTime interval, guint n_values,
GValue * values)
{
GstDirectControlBinding *self = GST_DIRECT_CONTROL_BINDING (_self);
gint i;
gdouble *src_val;
gboolean res = FALSE;
GType type;
GstDirectControlBindingConvertGValue convert;
g_return_val_if_fail (GST_IS_DIRECT_CONTROL_BINDING (self), FALSE);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (interval), FALSE);
g_return_val_if_fail (values, FALSE);
g_return_val_if_fail (GST_CONTROL_BINDING_PSPEC (self), FALSE);
convert = self->convert_g_value;
type = G_PARAM_SPEC_VALUE_TYPE (_self->pspec);
src_val = g_new0 (gdouble, n_values);
if ((res = gst_control_source_get_value_array (self->cs, timestamp,
interval, n_values, src_val))) {
for (i = 0; i < n_values; i++) {
/* we will only get NAN for sparse control sources, such as triggers */
if (!isnan (src_val[i])) {
g_value_init (&values[i], type);
convert (self, src_val[i], &values[i]);
} else {
GST_LOG ("no control value for property %s at index %d", _self->name,
i);
}
}
} else {
GST_LOG ("failed to get control value for property %s at ts %"
GST_TIME_FORMAT, _self->name, GST_TIME_ARGS (timestamp));
}
g_free (src_val);
return res;
}
/* functions */
/**
* gst_direct_control_binding_new:
* @object: the object of the property
* @property_name: the property-name to attach the control source
* @cs: the control source
*
* Create a new control-binding that attaches the #GstControlSource to the
* #GObject property. It will map the control source range [0.0 ... 1.0] to
* the full target property range, and clip all values outside this range.
*
* Returns: (transfer floating): the new #GstDirectControlBinding
*/
GstControlBinding *
gst_direct_control_binding_new (GstObject * object, const gchar * property_name,
GstControlSource * cs)
{
return (GstControlBinding *) g_object_new (GST_TYPE_DIRECT_CONTROL_BINDING,
"object", object, "name", property_name, "control-source", cs, NULL);
}
/**
* gst_direct_control_binding_new_absolute:
* @object: the object of the property
* @property_name: the property-name to attach the control source
* @cs: the control source
*
* Create a new control-binding that attaches the #GstControlSource to the
* #GObject property. It will directly map the control source values to the
* target property range without any transformations.
*
* Returns: (transfer floating): the new #GstDirectControlBinding
*
* Since: 1.6
*/
GstControlBinding *
gst_direct_control_binding_new_absolute (GstObject * object,
const gchar * property_name, GstControlSource * cs)
{
return (GstControlBinding *) g_object_new (GST_TYPE_DIRECT_CONTROL_BINDING,
"object", object, "name", property_name, "control-source", cs, "absolute",
TRUE, NULL);
}
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