Merge remote branch 'origin/master' into dexela

Conflicts:
	CMakeLists.txt
	src/CMakeLists.txt
	src/uca-camera.c

1 files changed, 181 insertions, 0 deletions

diff --git a/tools/perf-overhead.c b/tools/perf-overhead.c
new file mode 100644
index 0000000..6735e6f
--- /dev/null
+++ b/tools/perf-overhead.c
@@ -0,0 +1,181 @@
+/* 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-plugin-manager.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
+print_usage (void)
+{
+    GList *types;
+    UcaPluginManager *manager;
+
+    manager = uca_plugin_manager_new ();
+    g_print ("Usage: benchmark [ ");
+    types = uca_plugin_manager_get_available_cameras (manager);
+
+    if (types == NULL) {
+        g_print ("] -- no camera plugin found\n");
+        return;
+    }
+
+    for (GList *it = g_list_first (types); it != NULL; it = g_list_next (it)) {
+        gchar *name = (gchar *) it->data;
+        if (g_list_next (it) == NULL)
+            g_print ("%s ]\n", name);
+        else
+            g_print ("%s, ", name);
+    }
+}
+
+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[])
+{
+    UcaPluginManager *manager;
+    GError *error = NULL;
+    (void) signal (SIGINT, sigint_handler);
+
+    g_type_init ();
+    if (argc < 2) {
+        print_usage ();
+        return 1;
+    }
+
+    manager = uca_plugin_manager_new ();
+    camera = uca_plugin_manager_get_camera (manager, argv[1], &error);
+
+    if (camera == NULL) {
+        g_print ("Error during initialization: %s\n", error->message);
+        return 1;
+    }
+
+    test_synchronous_operation (camera);
+    g_print ("\n");
+    test_asynchronous_operation (camera);
+
+    g_object_unref (camera);
+    g_object_unref (manager);
+
+    return error != NULL ? 1 : 0;
+}