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/* Copyright (C) 2011, 2012 Matthias Vogelgesang <matthias.vogelgesang@kit.edu>
(Karlsruhe Institute of Technology)
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 2.1 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, write to the Free Software Foundation, Inc., 51
Franklin St, Fifth Floor, Boston, MA 02110, USA */
#include <glib-object.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "uca-camera.h"
#define handle_error(errno) {if ((errno) != UCA_NO_ERROR) printf("error at <%s:%i>\n", \
__FILE__, __LINE__);}
typedef struct {
guint counter;
gsize size;
gpointer destination;
} thread_data;
static UcaCamera *camera = NULL;
static void sigint_handler(int signal)
{
printf("Closing down libuca\n");
uca_camera_stop_recording(camera, NULL);
g_object_unref(camera);
exit(signal);
}
static void test_synchronous_operation(UcaCamera *camera)
{
GError *error = NULL;
guint width, height, bits;
g_object_get(G_OBJECT(camera),
"sensor-width", &width,
"sensor-height", &height,
"sensor-bitdepth", &bits,
NULL);
const int pixel_size = bits == 8 ? 1 : 2;
const gsize size = width * height * pixel_size;
const guint n_trials = 10000;
gpointer buffer = g_malloc0(size);
uca_camera_start_recording(camera, &error);
GTimer *timer = g_timer_new();
for (guint n = 0; n < n_trials; n++)
uca_camera_grab(camera, &buffer, &error);
gdouble total_time = g_timer_elapsed(timer, NULL);
g_timer_stop(timer);
g_print("Synchronous data transfer\n");
g_print(" Bandwidth: %3.2f MB/s\n", size * n_trials / 1024. / 1024. / total_time);
g_print(" Throughput: %3.2f frames/s\n", n_trials / total_time);
uca_camera_stop_recording(camera, &error);
g_free(buffer);
g_timer_destroy(timer);
}
static void grab_func(gpointer data, gpointer user_data)
{
static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
thread_data *d = (thread_data *) user_data;
g_memmove(d->destination, data, d->size);
g_static_mutex_lock(&mutex);
d->counter++;
g_static_mutex_unlock(&mutex);
}
static void test_asynchronous_operation(UcaCamera *camera)
{
GError *error = NULL;
guint width, height, bits;
g_object_get(G_OBJECT(camera),
"sensor-width", &width,
"sensor-height", &height,
"sensor-bitdepth", &bits,
NULL);
const guint pixel_size = bits == 8 ? 1 : 2;
thread_data d = {
.counter = 0,
.size = width * height * pixel_size,
.destination = g_malloc0(width * height * pixel_size)
};
g_object_set(G_OBJECT(camera),
"transfer-asynchronously", TRUE,
NULL);
uca_camera_set_grab_func(camera, &grab_func, &d);
uca_camera_start_recording(camera, &error);
g_usleep(G_USEC_PER_SEC);
uca_camera_stop_recording(camera, &error);
g_print("Asynchronous data transfer\n");
g_print(" Bandwidth: %3.2f MB/s\n", d.size * d.counter / 1024. / 1024.);
g_print(" Throughput: %i frames/s\n", d.counter);
g_free(d.destination);
}
int main(int argc, char *argv[])
{
GError *error = NULL;
(void) signal(SIGINT, sigint_handler);
g_type_init();
camera = uca_camera_new("mock", &error);
if (camera == NULL) {
g_print("Couldn't initialize camera\n");
return 1;
}
test_synchronous_operation(camera);
g_print("\n");
test_asynchronous_operation(camera);
g_object_unref(camera);
return error != NULL ? 1 : 0;
}
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