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/**
* Face detection and recognition functions
* Copyright 2018 Narendra A (narendra_m_a(at)yahoo(dot)com)
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
// DBus face_detect_proxy definition
public struct FaceRect {
public double x;
public double y;
public double width;
public double height;
public double[] vec;
}
[DBus (name = "org.gnome.Shotwell.Faces1")]
public interface FaceDetectInterface : DBusProxy {
public abstract FaceRect[] detect_faces(string inputName, string cascadeName, double scale, bool infer)
throws IOError, DBusError;
public abstract bool load_net(string netFile)
throws IOError, DBusError;
public abstract void terminate() throws IOError, DBusError;
}
// Class to communicate with facedetect process over DBus
public class FaceDetect {
public const string DBUS_NAME = "org.gnome.Shotwell.Faces1";
public const string DBUS_PATH = "/org/gnome/shotwell/faces";
public static bool connected = false;
public static string net_file;
public const string ERROR_MESSAGE = "Unable to connect to facedetect service";
public static FaceDetectInterface face_detect_proxy;
#if FACEDETECT_BUS_PRIVATE
private static GLib.DBusServer dbus_server;
private static Subprocess process;
#endif
public static void create_face_detect_proxy(DBusConnection connection, string bus_name, string owner) {
if (bus_name == DBUS_NAME) {
message("Dbus name %s available", bus_name);
try {
// Service file should automatically run the facedetect binary
face_detect_proxy = Bus.get_proxy_sync (BusType.SESSION, DBUS_NAME, DBUS_PATH);
face_detect_proxy.load_net(net_file);
connected = true;
} catch(IOError e) {
AppWindow.error_message(ERROR_MESSAGE);
} catch(DBusError e) {
AppWindow.error_message(ERROR_MESSAGE);
}
}
}
public static void interface_gone(DBusConnection connection, string bus_name) {
message("Dbus name %s gone", bus_name);
connected = false;
face_detect_proxy = null;
}
#if FACEDETECT_BUS_PRIVATE
private static bool on_new_connection(DBusServer server, DBusConnection connection) {
try {
face_detect_proxy = connection.get_proxy_sync(null, DBUS_PATH,
DBusProxyFlags.DO_NOT_LOAD_PROPERTIES
| DBusProxyFlags.DO_NOT_CONNECT_SIGNALS,
null);
Idle.add(() => {
try {
face_detect_proxy.load_net(net_file);
connected = true;
} catch (Error error) {
critical("Failed to call load_net: %s", error.message);
AppWindow.error_message(ERROR_MESSAGE);
}
return false;
});
return true;
} catch (Error error) {
critical("Failed to create face_detect_proxy for face detect: %s", error.message);
AppWindow.error_message(ERROR_MESSAGE);
return false;
}
}
#endif
public static void init(string net_file) {
FaceDetect.net_file = net_file;
#if FACEDETECT_BUS_PRIVATE
var address = "unix:tmpdir=%s".printf(Environment.get_tmp_dir());
var observer = new DBusAuthObserver();
observer.authorize_authenticated_peer.connect((stream, credentials) => {
debug("Observer trying to authorize for %s", credentials.to_string());
if (credentials == null)
return false;
try {
if (!credentials.is_same_user(new Credentials()))
return false;
return true;
} catch (Error error) {
return false;
}
});
try {
dbus_server = new GLib.DBusServer.sync(address, DBusServerFlags.NONE, DBus.generate_guid(), observer, null);
dbus_server.new_connection.connect(on_new_connection);
dbus_server.start();
process = new Subprocess(SubprocessFlags.NONE, AppDirs.get_facedetect_bin().get_path(),
"--address=" + dbus_server.get_client_address());
} catch (Error error) {
warning("Failed to create private DBus server: %s", error.message);
AppWindow.error_message(ERROR_MESSAGE);
}
#else
Bus.watch_name(BusType.SESSION, DBUS_NAME, BusNameWatcherFlags.NONE,
create_face_detect_proxy, interface_gone);
#endif
}
}
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