| /* 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 |
| * @short_description: direct attachment for control sources |
| * |
| * A value mapping object that attaches control sources to gobject properties. It |
| * will map the control values [0.0 ... 1.0] to the target property range. If a |
| * control value is outside of the range, it will be clipped. |
| */ |
| |
| #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_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); \ |
| } |
| |
| |
| 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); |
| |
| 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 */ |
| switch (base) { |
| case G_TYPE_INT: |
| self->convert_g_value = convert_g_value_to_int; |
| self->convert_value = convert_value_to_int; |
| self->byte_size = sizeof (gint); |
| break; |
| case G_TYPE_UINT: |
| self->convert_g_value = convert_g_value_to_uint; |
| self->convert_value = convert_value_to_uint; |
| self->byte_size = sizeof (guint); |
| break; |
| case G_TYPE_LONG: |
| self->convert_g_value = convert_g_value_to_long; |
| self->convert_value = convert_value_to_long; |
| self->byte_size = sizeof (glong); |
| break; |
| case G_TYPE_ULONG: |
| self->convert_g_value = convert_g_value_to_ulong; |
| self->convert_value = convert_value_to_ulong; |
| self->byte_size = sizeof (gulong); |
| break; |
| case G_TYPE_INT64: |
| self->convert_g_value = convert_g_value_to_int64; |
| self->convert_value = convert_value_to_int64; |
| self->byte_size = sizeof (gint64); |
| break; |
| case G_TYPE_UINT64: |
| self->convert_g_value = convert_g_value_to_uint64; |
| self->convert_value = convert_value_to_uint64; |
| self->byte_size = sizeof (guint64); |
| break; |
| case G_TYPE_FLOAT: |
| self->convert_g_value = convert_g_value_to_float; |
| self->convert_value = convert_value_to_float; |
| self->byte_size = sizeof (gfloat); |
| break; |
| case G_TYPE_DOUBLE: |
| self->convert_g_value = convert_g_value_to_double; |
| self->convert_value = convert_value_to_double; |
| self->byte_size = sizeof (gdouble); |
| 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; |
| 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; |
| 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); |
| |
| 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. |
| * |
| * 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); |
| } |