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/*
* Copyright (C) 2011-2015 Karlsruhe Institute of Technology
*
* This file is part of Ufo.
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "ufo-sliding-stack-task.h"
struct _UfoSlidingStackTaskPrivate {
guint n_items;
guint current;
guint8 *window;
};
static void ufo_task_interface_init (UfoTaskIface *iface);
G_DEFINE_TYPE_WITH_CODE (UfoSlidingStackTask, ufo_sliding_stack_task, UFO_TYPE_TASK_NODE,
G_IMPLEMENT_INTERFACE (UFO_TYPE_TASK,
ufo_task_interface_init))
#define UFO_SLIDING_STACK_TASK_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE((obj), UFO_TYPE_SLIDING_STACK_TASK, UfoSlidingStackTaskPrivate))
enum {
PROP_0,
PROP_NUM_ITEMS,
N_PROPERTIES
};
static GParamSpec *properties[N_PROPERTIES] = { NULL, };
UfoNode *
ufo_sliding_stack_task_new (void)
{
return UFO_NODE (g_object_new (UFO_TYPE_SLIDING_STACK_TASK, NULL));
}
static void
ufo_sliding_stack_task_setup (UfoTask *task,
UfoResources *resources,
GError **error)
{
UfoSlidingStackTaskPrivate *priv;
priv = UFO_SLIDING_STACK_TASK_GET_PRIVATE (task);
priv->current = 0;
}
static void
ufo_sliding_stack_task_get_requisition (UfoTask *task,
UfoBuffer **inputs,
UfoRequisition *requisition,
GError **error)
{
UfoSlidingStackTaskPrivate *priv;
priv = UFO_SLIDING_STACK_TASK_GET_PRIVATE (task);
ufo_buffer_get_requisition (inputs[0], requisition);
requisition->n_dims = 3;
requisition->dims[2] = priv->n_items;
if (priv->window == NULL) {
priv->window = g_malloc0 (requisition->dims[0] *
requisition->dims[1] *
requisition->dims[2] * sizeof (gfloat));
}
}
static guint
ufo_sliding_stack_task_get_num_inputs (UfoTask *task)
{
return 1;
}
static guint
ufo_sliding_stack_task_get_num_dimensions (UfoTask *task,
guint input)
{
return 2;
}
static UfoTaskMode
ufo_sliding_stack_task_get_mode (UfoTask *task)
{
return UFO_TASK_MODE_PROCESSOR | UFO_TASK_MODE_CPU;
}
static gboolean
ufo_sliding_stack_task_process (UfoTask *task,
UfoBuffer **inputs,
UfoBuffer *output,
UfoRequisition *requisition)
{
UfoSlidingStackTaskPrivate *priv;
guint8 *in_mem;
guint8 *out_mem;
gsize size, window_size;
guint i;
priv = UFO_SLIDING_STACK_TASK_GET_PRIVATE (task);
size = ufo_buffer_get_size (inputs[0]);
window_size = requisition->dims[0] * requisition->dims[1] * requisition->dims[2] * sizeof (gfloat);
in_mem = (guint8 *) ufo_buffer_get_host_array (inputs[0], NULL);
out_mem = (guint8 *) ufo_buffer_get_host_array (output, NULL);
memcpy (priv->window + priv->current % priv->n_items * size, in_mem, size);
priv->current++;
if (priv->current == 1) {
/* Copy the first input to the whole window. */
for (i = 1; i < priv->n_items; i++) {
memcpy (priv->window + i * size, in_mem, size);
}
}
/* The double buffering prevents us to use *out_mem* directly, because we would
* replace even indices in one output buffer and odd in the other. So we
* need to keep a copy of the input locally and copy to the output.
* TODO: improve this on a lower level in ufo-core. */
memcpy (out_mem, priv->window, window_size);
return TRUE;
}
static void
ufo_sliding_stack_task_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
UfoSlidingStackTaskPrivate *priv = UFO_SLIDING_STACK_TASK_GET_PRIVATE (object);
switch (property_id) {
case PROP_NUM_ITEMS:
priv->n_items = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
ufo_sliding_stack_task_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
UfoSlidingStackTaskPrivate *priv = UFO_SLIDING_STACK_TASK_GET_PRIVATE (object);
switch (property_id) {
case PROP_NUM_ITEMS:
g_value_set_uint (value, priv->n_items);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
ufo_sliding_stack_task_finalize (GObject *object)
{
UfoSlidingStackTaskPrivate *priv;
priv = UFO_SLIDING_STACK_TASK_GET_PRIVATE (object);
if (priv->window) {
g_free (priv->window);
priv->window = NULL;
}
G_OBJECT_CLASS (ufo_sliding_stack_task_parent_class)->finalize (object);
}
static void
ufo_task_interface_init (UfoTaskIface *iface)
{
iface->setup = ufo_sliding_stack_task_setup;
iface->get_num_inputs = ufo_sliding_stack_task_get_num_inputs;
iface->get_num_dimensions = ufo_sliding_stack_task_get_num_dimensions;
iface->get_mode = ufo_sliding_stack_task_get_mode;
iface->get_requisition = ufo_sliding_stack_task_get_requisition;
iface->process = ufo_sliding_stack_task_process;
}
static void
ufo_sliding_stack_task_class_init (UfoSlidingStackTaskClass *klass)
{
GObjectClass *oclass = G_OBJECT_CLASS (klass);
oclass->set_property = ufo_sliding_stack_task_set_property;
oclass->get_property = ufo_sliding_stack_task_get_property;
oclass->finalize = ufo_sliding_stack_task_finalize;
properties[PROP_NUM_ITEMS] =
g_param_spec_uint ("number",
"Number of items in the sliding window",
"Number of items in the sliding window",
1, G_MAXUINT, 1,
G_PARAM_READWRITE);
for (guint i = PROP_0 + 1; i < N_PROPERTIES; i++)
g_object_class_install_property (oclass, i, properties[i]);
g_type_class_add_private (oclass, sizeof(UfoSlidingStackTaskPrivate));
}
static void
ufo_sliding_stack_task_init(UfoSlidingStackTask *self)
{
self->priv = UFO_SLIDING_STACK_TASK_GET_PRIVATE(self);
self->priv->n_items = 1;
self->priv->window = NULL;
}
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