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gstreamer/libs/gst/controller/gstargbcontrolbinding.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>
*
* gstargbcontrolbinding.c: Attachment for multiple control sources to gargb
* properties
*
* 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:gstargbcontrolbinding
* @title: GstARGBControlBinding
* @short_description: attachment for control sources to argb properties
*
* A value mapping object that attaches multiple control sources to a guint
* gobject properties representing a color. A control value of 0.0 will turn the
* color component off and a value of 1.0 will be the color level.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib-object.h>
#include <gst/gst.h>
#include "gstargbcontrolbinding.h"
#include <gst/math-compat.h>
#define GST_CAT_DEFAULT control_binding_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
static GObject *gst_argb_control_binding_constructor (GType type,
guint n_construct_params, GObjectConstructParam * construct_params);
static void gst_argb_control_binding_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_argb_control_binding_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_argb_control_binding_dispose (GObject * object);
static void gst_argb_control_binding_finalize (GObject * object);
static gboolean gst_argb_control_binding_sync_values (GstControlBinding * _self,
GstObject * object, GstClockTime timestamp, GstClockTime last_sync);
static GValue *gst_argb_control_binding_get_value (GstControlBinding * _self,
GstClockTime timestamp);
static gboolean gst_argb_control_binding_get_value_array (GstControlBinding *
_self, GstClockTime timestamp, GstClockTime interval, guint n_values,
gpointer values);
static gboolean gst_argb_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, "gstargbcontrolbinding", 0, \
"dynamic parameter control source attachment");
#define gst_argb_control_binding_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstARGBControlBinding, gst_argb_control_binding,
GST_TYPE_CONTROL_BINDING, _do_init);
enum
{
PROP_0,
PROP_CS_A,
PROP_CS_R,
PROP_CS_G,
PROP_CS_B,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
/* vmethods */
static void
gst_argb_control_binding_class_init (GstARGBControlBindingClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstControlBindingClass *control_binding_class =
GST_CONTROL_BINDING_CLASS (klass);
gobject_class->constructor = gst_argb_control_binding_constructor;
gobject_class->set_property = gst_argb_control_binding_set_property;
gobject_class->get_property = gst_argb_control_binding_get_property;
gobject_class->dispose = gst_argb_control_binding_dispose;
gobject_class->finalize = gst_argb_control_binding_finalize;
control_binding_class->sync_values = gst_argb_control_binding_sync_values;
control_binding_class->get_value = gst_argb_control_binding_get_value;
control_binding_class->get_value_array =
gst_argb_control_binding_get_value_array;
control_binding_class->get_g_value_array =
gst_argb_control_binding_get_g_value_array;
properties[PROP_CS_A] =
g_param_spec_object ("control-source-a", "ControlSource A",
"The control source for the alpha color component",
GST_TYPE_CONTROL_SOURCE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS);
properties[PROP_CS_R] =
g_param_spec_object ("control-source-r", "ControlSource R",
"The control source for the red color component",
GST_TYPE_CONTROL_SOURCE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS);
properties[PROP_CS_G] =
g_param_spec_object ("control-source-g", "ControlSource G",
"The control source for the green color component",
GST_TYPE_CONTROL_SOURCE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS);
properties[PROP_CS_B] =
g_param_spec_object ("control-source-b", "ControlSource B",
"The control source for the blue color component",
GST_TYPE_CONTROL_SOURCE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (gobject_class, PROP_LAST, properties);
}
static void
gst_argb_control_binding_init (GstARGBControlBinding * self)
{
}
static GObject *
gst_argb_control_binding_constructor (GType type, guint n_construct_params,
GObjectConstructParam * construct_params)
{
GstARGBControlBinding *self;
self =
GST_ARGB_CONTROL_BINDING (G_OBJECT_CLASS (parent_class)->constructor
(type, n_construct_params, construct_params));
if (GST_CONTROL_BINDING_PSPEC (self)) {
if (!(G_PARAM_SPEC_VALUE_TYPE (GST_CONTROL_BINDING_PSPEC (self)) ==
G_TYPE_UINT)) {
GST_WARNING ("can't bind to paramspec type '%s'",
G_PARAM_SPEC_TYPE_NAME (GST_CONTROL_BINDING_PSPEC (self)));
GST_CONTROL_BINDING_PSPEC (self) = NULL;
} else {
g_value_init (&self->cur_value, G_TYPE_UINT);
}
}
return (GObject *) self;
}
static void
gst_argb_control_binding_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstARGBControlBinding *self = GST_ARGB_CONTROL_BINDING (object);
switch (prop_id) {
case PROP_CS_A:
gst_object_replace ((GstObject **) & self->cs_a,
g_value_get_object (value));
break;
case PROP_CS_R:
gst_object_replace ((GstObject **) & self->cs_r,
g_value_get_object (value));
break;
case PROP_CS_G:
gst_object_replace ((GstObject **) & self->cs_g,
g_value_get_object (value));
break;
case PROP_CS_B:
gst_object_replace ((GstObject **) & self->cs_b,
g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_argb_control_binding_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstARGBControlBinding *self = GST_ARGB_CONTROL_BINDING (object);
switch (prop_id) {
case PROP_CS_A:
g_value_set_object (value, self->cs_a);
break;
case PROP_CS_R:
g_value_set_object (value, self->cs_r);
break;
case PROP_CS_G:
g_value_set_object (value, self->cs_g);
break;
case PROP_CS_B:
g_value_set_object (value, self->cs_b);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_argb_control_binding_dispose (GObject * object)
{
GstARGBControlBinding *self = GST_ARGB_CONTROL_BINDING (object);
gst_object_replace ((GstObject **) & self->cs_a, NULL);
gst_object_replace ((GstObject **) & self->cs_r, NULL);
gst_object_replace ((GstObject **) & self->cs_g, NULL);
gst_object_replace ((GstObject **) & self->cs_b, NULL);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_argb_control_binding_finalize (GObject * object)
{
GstARGBControlBinding *self = GST_ARGB_CONTROL_BINDING (object);
g_value_unset (&self->cur_value);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_argb_control_binding_sync_values (GstControlBinding * _self,
GstObject * object, GstClockTime timestamp, GstClockTime last_sync)
{
GstARGBControlBinding *self = GST_ARGB_CONTROL_BINDING (_self);
gdouble src_val_a = 1.0, src_val_r = 0.0, src_val_g = 0.0, src_val_b = 0.0;
gboolean ret = TRUE;
g_return_val_if_fail (GST_IS_ARGB_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));
if (self->cs_a)
ret &= gst_control_source_get_value (self->cs_a, timestamp, &src_val_a);
if (self->cs_r)
ret &= gst_control_source_get_value (self->cs_r, timestamp, &src_val_r);
if (self->cs_g)
ret &= gst_control_source_get_value (self->cs_g, timestamp, &src_val_g);
if (self->cs_b)
ret &= gst_control_source_get_value (self->cs_b, timestamp, &src_val_b);
if (G_LIKELY (ret)) {
guint src_val = (((guint) (CLAMP (src_val_a, 0.0, 1.0) * 255)) << 24) |
(((guint) (CLAMP (src_val_r, 0.0, 1.0) * 255)) << 16) |
(((guint) (CLAMP (src_val_g, 0.0, 1.0) * 255)) << 8) |
((guint) (CLAMP (src_val_b, 0.0, 1.0) * 255));
GST_LOG_OBJECT (object, " new value 0x%08x", 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;
g_value_set_uint (dst_val, src_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_argb_control_binding_get_value (GstControlBinding * _self,
GstClockTime timestamp)
{
GstARGBControlBinding *self = GST_ARGB_CONTROL_BINDING (_self);
GValue *dst_val = NULL;
gdouble src_val_a = 1.0, src_val_r = 0.0, src_val_g = 0.0, src_val_b = 0.0;
gboolean ret = TRUE;
g_return_val_if_fail (GST_IS_ARGB_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 (self->cs_a)
ret &= gst_control_source_get_value (self->cs_a, timestamp, &src_val_a);
if (self->cs_r)
ret &= gst_control_source_get_value (self->cs_r, timestamp, &src_val_r);
if (self->cs_g)
ret &= gst_control_source_get_value (self->cs_g, timestamp, &src_val_g);
if (self->cs_b)
ret &= gst_control_source_get_value (self->cs_b, timestamp, &src_val_b);
if (G_LIKELY (ret)) {
guint src_val = (((guint) (CLAMP (src_val_a, 0.0, 1.0) * 255)) << 24) |
(((guint) (CLAMP (src_val_r, 0.0, 1.0) * 255)) << 16) |
(((guint) (CLAMP (src_val_g, 0.0, 1.0) * 255)) << 8) |
((guint) (CLAMP (src_val_b, 0.0, 1.0) * 255));
dst_val = g_new0 (GValue, 1);
g_value_init (dst_val, G_TYPE_UINT);
g_value_set_uint (dst_val, src_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_argb_control_binding_get_value_array (GstControlBinding * _self,
GstClockTime timestamp, GstClockTime interval, guint n_values,
gpointer values_)
{
GstARGBControlBinding *self = GST_ARGB_CONTROL_BINDING (_self);
gint i;
gdouble *src_val_a = NULL, *src_val_r = NULL, *src_val_g = NULL, *src_val_b =
NULL;
guint *values = (guint *) values_;
gboolean ret = TRUE;
g_return_val_if_fail (GST_IS_ARGB_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);
if (self->cs_a) {
src_val_a = g_new0 (gdouble, n_values);
ret &= gst_control_source_get_value_array (self->cs_a, timestamp,
interval, n_values, src_val_a);
}
if (self->cs_r) {
src_val_r = g_new0 (gdouble, n_values);
ret &= gst_control_source_get_value_array (self->cs_r, timestamp,
interval, n_values, src_val_r);
}
if (self->cs_g) {
src_val_g = g_new0 (gdouble, n_values);
ret &= gst_control_source_get_value_array (self->cs_g, timestamp,
interval, n_values, src_val_g);
}
if (self->cs_b) {
src_val_b = g_new0 (gdouble, n_values);
ret &= gst_control_source_get_value_array (self->cs_b, timestamp,
interval, n_values, src_val_b);
}
if (G_LIKELY (ret)) {
for (i = 0; i < n_values; i++) {
gdouble a = 1.0, r = 0.0, g = 0.0, b = 0.0;
if (src_val_a && !isnan (src_val_a[i]))
a = src_val_a[i];
if (src_val_r && !isnan (src_val_r[i]))
r = src_val_r[i];
if (src_val_g && !isnan (src_val_g[i]))
g = src_val_g[i];
if (src_val_b && !isnan (src_val_b[i]))
b = src_val_b[i];
values[i] = (((guint) (CLAMP (a, 0.0, 1.0) * 255)) << 24) |
(((guint) (CLAMP (r, 0.0, 1.0) * 255)) << 16) |
(((guint) (CLAMP (g, 0.0, 1.0) * 255)) << 8) |
((guint) (CLAMP (b, 0.0, 1.0) * 255));
}
} 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_a);
g_free (src_val_r);
g_free (src_val_g);
g_free (src_val_b);
return ret;
}
static gboolean
gst_argb_control_binding_get_g_value_array (GstControlBinding * _self,
GstClockTime timestamp, GstClockTime interval, guint n_values,
GValue * values)
{
GstARGBControlBinding *self = GST_ARGB_CONTROL_BINDING (_self);
gint i;
gdouble *src_val_a = NULL, *src_val_r = NULL, *src_val_g = NULL, *src_val_b =
NULL;
guint src_val;
gboolean ret = TRUE;
g_return_val_if_fail (GST_IS_ARGB_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);
if (self->cs_a) {
src_val_a = g_new0 (gdouble, n_values);
ret &= gst_control_source_get_value_array (self->cs_a, timestamp,
interval, n_values, src_val_a);
}
if (self->cs_r) {
src_val_r = g_new0 (gdouble, n_values);
ret &= gst_control_source_get_value_array (self->cs_r, timestamp,
interval, n_values, src_val_r);
}
if (self->cs_g) {
src_val_g = g_new0 (gdouble, n_values);
ret &= gst_control_source_get_value_array (self->cs_g, timestamp,
interval, n_values, src_val_g);
}
if (self->cs_b) {
src_val_b = g_new0 (gdouble, n_values);
ret &= gst_control_source_get_value_array (self->cs_b, timestamp,
interval, n_values, src_val_b);
}
if (G_LIKELY (ret)) {
for (i = 0; i < n_values; i++) {
gdouble a = 1.0, r = 0.0, g = 0.0, b = 0.0;
if (src_val_a && !isnan (src_val_a[i]))
a = src_val_a[i];
if (src_val_r && !isnan (src_val_r[i]))
r = src_val_r[i];
if (src_val_g && !isnan (src_val_g[i]))
g = src_val_g[i];
if (src_val_b && !isnan (src_val_b[i]))
b = src_val_b[i];
src_val = (((guint) (CLAMP (a, 0.0, 1.0) * 255)) << 24) |
(((guint) (CLAMP (r, 0.0, 1.0) * 255)) << 16) |
(((guint) (CLAMP (g, 0.0, 1.0) * 255)) << 8) |
((guint) (CLAMP (b, 0.0, 1.0) * 255));
g_value_init (&values[i], G_TYPE_UINT);
g_value_set_uint (&values[i], src_val);
}
} 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_a);
g_free (src_val_r);
g_free (src_val_g);
g_free (src_val_b);
return ret;
}
/* functions */
/**
* gst_argb_control_binding_new:
* @object: the object of the property
* @property_name: the property-name to attach the control source
* @cs_a: the control source for the alpha channel
* @cs_r: the control source for the red channel
* @cs_g: the control source for the green channel
* @cs_b: the control source for the blue channel
*
* Create a new control-binding that attaches the given #GstControlSource to the
* #GObject property.
*
* Returns: (transfer floating): the new #GstARGBControlBinding
*/
GstControlBinding *
gst_argb_control_binding_new (GstObject * object, const gchar * property_name,
GstControlSource * cs_a, GstControlSource * cs_r, GstControlSource * cs_g,
GstControlSource * cs_b)
{
return (GstControlBinding *) g_object_new (GST_TYPE_ARGB_CONTROL_BINDING,
"object", object, "name", property_name,
"control-source-a", cs_a,
"control-source-r", cs_r,
"control-source-g", cs_g, "control-source-b", cs_b, NULL);
}
/* functions */
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