685 lines
16 KiB
C
685 lines
16 KiB
C
/* -*- Mode: C ; c-basic-offset: 2 -*- */
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/*
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* LADI Session Handler (ladish)
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*
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* Copyright (C) 2009 Nedko Arnaudov <nedko@arnaudov.name>
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*
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**************************************************************************
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* This file contains helper functionality for accessing JACK through D-Bus
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**************************************************************************
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*
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* LADI Session Handler is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* LADI Session Handler is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
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* or write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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//#define LASH_DEBUG
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#include <dbus/dbus.h>
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#include "common.h"
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#include "jack_proxy.h"
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#include "dbus/helpers.h"
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#include "common/debug.h"
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#define JACKDBUS_SERVICE "org.jackaudio.service"
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#define JACKDBUS_OBJECT "/org/jackaudio/Controller"
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#define JACKDBUS_IFACE_CONTROL "org.jackaudio.JackControl"
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#define JACKDBUS_IFACE_PATCHBAY "org.jackaudio.JackPatchbay"
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#define JACKDBUS_IFACE_CONFIGURE "org.jackaudio.Configure"
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static
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void
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on_jack_patchbay_signal(
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DBusMessage * message_ptr,
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const char * signal_name)
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{
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const char * client1_name;
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const char * port1_name;
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const char * client2_name;
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const char * port2_name;
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dbus_uint64_t dummy;
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dbus_uint64_t client1_id;
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dbus_uint64_t client2_id;
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dbus_uint64_t port1_id;
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dbus_uint64_t port2_id;
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dbus_error_init(&g_dbus_error);
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if (strcmp(signal_name, "ClientAppeared") == 0)
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{
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lash_debug("Received ClientAppeared signal");
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if (!dbus_message_get_args(
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message_ptr,
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&g_dbus_error,
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DBUS_TYPE_UINT64, &dummy,
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DBUS_TYPE_UINT64, &client1_id,
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DBUS_TYPE_STRING, &client1_name,
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DBUS_TYPE_INVALID))
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{
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goto fail;
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}
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on_jack_client_appeared(client1_id, client1_name);
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return;
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}
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if (strcmp(signal_name, "ClientDisappeared") == 0)
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{
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lash_debug("Received ClientDisappeared signal");
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if (!dbus_message_get_args(
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message_ptr,
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&g_dbus_error,
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DBUS_TYPE_UINT64, &dummy,
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DBUS_TYPE_UINT64, &client1_id,
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DBUS_TYPE_STRING, &client1_name,
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DBUS_TYPE_INVALID))
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{
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goto fail;
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}
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on_jack_client_disappeared(client1_id);
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return;
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}
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if (strcmp(signal_name, "PortAppeared") == 0)
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{
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lash_debug("Received PortAppeared signal");
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if (!dbus_message_get_args(
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message_ptr,
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&g_dbus_error,
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DBUS_TYPE_UINT64, &dummy,
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DBUS_TYPE_UINT64, &client1_id,
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DBUS_TYPE_STRING, &client1_name,
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DBUS_TYPE_UINT64, &port1_id,
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DBUS_TYPE_STRING, &port1_name,
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DBUS_TYPE_INVALID))
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{
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goto fail;
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}
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on_jack_port_appeared(client1_id, port1_id, port1_name);
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return;
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}
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if (strcmp(signal_name, "PortsConnected") == 0)
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{
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lash_debug("Received PortsConnected signal");
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if (!dbus_message_get_args(
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message_ptr,
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&g_dbus_error,
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DBUS_TYPE_UINT64, &dummy,
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DBUS_TYPE_UINT64, &client1_id,
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DBUS_TYPE_STRING, &client1_name,
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DBUS_TYPE_UINT64, &port1_id,
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DBUS_TYPE_STRING, &port1_name,
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DBUS_TYPE_UINT64, &client2_id,
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DBUS_TYPE_STRING, &client2_name,
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DBUS_TYPE_UINT64, &port2_id,
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DBUS_TYPE_STRING, &port2_name,
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DBUS_TYPE_INVALID))
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{
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goto fail;
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}
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on_jack_ports_connected(
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client1_id,
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port1_id,
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client2_id,
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port2_id);
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return;
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}
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if (strcmp(signal_name, "PortsDisconnected") == 0)
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{
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lash_debug("Received PortsDisconnected signal");
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if (!dbus_message_get_args(
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message_ptr,
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&g_dbus_error,
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DBUS_TYPE_UINT64, &dummy,
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DBUS_TYPE_UINT64, &client1_id,
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DBUS_TYPE_STRING, &client1_name,
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DBUS_TYPE_UINT64, &port1_id,
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DBUS_TYPE_STRING, &port1_name,
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DBUS_TYPE_UINT64, &client2_id,
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DBUS_TYPE_STRING, &client2_name,
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DBUS_TYPE_UINT64, &port2_id,
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DBUS_TYPE_STRING, &port2_name,
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DBUS_TYPE_INVALID))
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{
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goto fail;
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}
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on_jack_ports_disconnected(
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client1_id,
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port1_id,
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client2_id,
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port2_id);
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return;
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}
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return;
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fail:
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lash_error("Cannot get message arguments: %s", g_dbus_error.message);
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dbus_error_free(&g_dbus_error);
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}
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static
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void
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on_jack_control_signal(
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DBusMessage * message_ptr,
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const char * signal_name)
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{
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if (strcmp(signal_name, "ServerStarted") == 0)
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{
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lash_debug("JACK server start detected.");
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on_jack_server_started();
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return;
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}
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if (strcmp(signal_name, "ServerStopped") == 0)
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{
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lash_debug("JACK server stop detected.");
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on_jack_server_stopped();
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return;
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}
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}
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static
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DBusHandlerResult
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on_bus_signal(
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DBusMessage * message_ptr,
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const char * signal_name)
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{
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const char * object_name;
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const char * old_owner;
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const char * new_owner;
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//lash_info("bus signal '%s' received", signal_name);
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dbus_error_init(&g_dbus_error);
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if (strcmp(signal_name, "NameOwnerChanged") == 0)
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{
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//lash_info("NameOwnerChanged signal received");
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if (!dbus_message_get_args(
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message_ptr,
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&g_dbus_error,
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DBUS_TYPE_STRING, &object_name,
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DBUS_TYPE_STRING, &old_owner,
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DBUS_TYPE_STRING, &new_owner,
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DBUS_TYPE_INVALID)) {
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lash_error("Cannot get message arguments: %s", g_dbus_error.message);
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dbus_error_free(&g_dbus_error);
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return DBUS_HANDLER_RESULT_HANDLED;
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}
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if (strcmp(object_name, JACKDBUS_SERVICE) != 0)
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{
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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}
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if (old_owner[0] == '\0')
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{
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lash_debug("JACK serivce appeared");
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on_jack_server_appeared();
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}
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else if (new_owner[0] == '\0')
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{
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lash_debug("JACK serivce disappeared");
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on_jack_server_disappeared();
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}
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return DBUS_HANDLER_RESULT_HANDLED;
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}
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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}
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static
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DBusHandlerResult
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dbus_signal_handler(
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DBusConnection * connection_ptr,
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DBusMessage * message_ptr,
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void * data)
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{
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const char * object_path;
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const char * interface;
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const char * signal_name;
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/* Non-signal messages are ignored */
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if (dbus_message_get_type(message_ptr) != DBUS_MESSAGE_TYPE_SIGNAL)
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{
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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}
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interface = dbus_message_get_interface(message_ptr);
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if (interface == NULL)
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{
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/* Signals with no interface are ignored */
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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}
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object_path = dbus_message_get_path(message_ptr);
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signal_name = dbus_message_get_member(message_ptr);
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if (signal_name == NULL)
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{
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lash_error("Received signal with NULL member");
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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}
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lash_debug("'%s' sent signal '%s'::'%s'", object_path, interface, signal_name);
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/* Handle JACK patchbay and control interface signals */
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if (object_path != NULL && strcmp(object_path, JACKDBUS_OBJECT) == 0)
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{
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if (strcmp(interface, JACKDBUS_IFACE_PATCHBAY) == 0)
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{
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on_jack_patchbay_signal(message_ptr, signal_name);
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return DBUS_HANDLER_RESULT_HANDLED;
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}
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if (strcmp(interface, JACKDBUS_IFACE_CONTROL) == 0)
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{
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on_jack_control_signal(message_ptr, signal_name);
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return DBUS_HANDLER_RESULT_HANDLED;
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}
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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}
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/* Handle session bus signals to track JACK service alive state */
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if (strcmp(interface, DBUS_INTERFACE_DBUS) == 0)
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{
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return on_bus_signal(message_ptr, signal_name);
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}
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/* Let everything else pass through */
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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}
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bool
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jack_proxy_init(
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void)
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{
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DBusError err;
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char rule[1024];
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const char ** signal;
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const char * patchbay_signals[] = {
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"ClientAppeared",
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"ClientDisappeared",
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"PortAppeared",
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"PortsConnected",
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"PortsDisconnected",
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NULL};
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const char * control_signals[] = {
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"ServerStarted",
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"ServerStopped",
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NULL};
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dbus_bus_add_match(
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g_dbus_connection,
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"type='signal',interface='"DBUS_INTERFACE_DBUS"',member=NameOwnerChanged,arg0='"JACKDBUS_SERVICE"'",
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&err);
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if (dbus_error_is_set(&err))
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{
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lash_error("Failed to add D-Bus match rule: %s", err.message);
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dbus_error_free(&err);
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return false;
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}
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for (signal = patchbay_signals; *signal != NULL; signal++)
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{
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snprintf(
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rule,
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sizeof(rule),
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"type='signal',sender='"JACKDBUS_SERVICE"',path='"JACKDBUS_OBJECT"',interface='"JACKDBUS_IFACE_PATCHBAY"',member='%s'",
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*signal);
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dbus_bus_add_match(g_dbus_connection, rule, &err);
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if (dbus_error_is_set(&err))
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{
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lash_error("Failed to add D-Bus match rule: %s", err.message);
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dbus_error_free(&err);
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return false;
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}
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}
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for (signal = control_signals; *signal != NULL; signal++)
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{
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snprintf(
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rule,
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sizeof(rule),
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"type='signal',sender='"JACKDBUS_SERVICE"',path='"JACKDBUS_OBJECT"',interface='"JACKDBUS_IFACE_CONTROL"',member='%s'",
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*signal);
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dbus_bus_add_match(g_dbus_connection, rule, &err);
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if (dbus_error_is_set(&err))
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{
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lash_error("Failed to add D-Bus match rule: %s", err.message);
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dbus_error_free(&err);
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return false;
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}
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}
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if (!dbus_connection_add_filter(g_dbus_connection, dbus_signal_handler, NULL, NULL))
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{
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lash_error("Failed to add D-Bus filter");
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return false;
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}
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return true;
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}
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void
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jack_proxy_uninit(
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void)
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{
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dbus_connection_remove_filter(g_dbus_connection, dbus_signal_handler, NULL);
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}
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bool
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jack_proxy_is_started(
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bool * started_ptr)
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{
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dbus_bool_t started;
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if (!dbus_call_simple(JACKDBUS_SERVICE, JACKDBUS_OBJECT, JACKDBUS_IFACE_CONTROL, "IsStarted", "", "b", &started))
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{
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return false;
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}
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*started_ptr = started;
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return true;
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}
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bool
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jack_proxy_get_client_pid(
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uint64_t client_id,
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pid_t * pid_ptr)
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{
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return false;
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}
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bool
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jack_proxy_connect_ports(
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uint64_t port1_id,
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uint64_t port2_id)
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{
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return false;
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}
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static
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bool
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add_address(
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DBusMessageIter * iter_ptr,
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const char * address)
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{
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DBusMessageIter array_iter;
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const char * component;
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if (!dbus_message_iter_open_container(iter_ptr, DBUS_TYPE_ARRAY, "s", &array_iter))
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{
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lash_error("dbus_message_iter_open_container() failed.");
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return false;
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}
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if (address != NULL)
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{
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component = address;
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while (*component != 0)
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{
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if (!dbus_message_iter_append_basic(&array_iter, DBUS_TYPE_STRING, &component))
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{
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lash_error("dbus_message_iter_append_basic() failed.");
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return false;
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}
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component += strlen(component) + 1;
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}
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}
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dbus_message_iter_close_container(iter_ptr, &array_iter);
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return true;
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}
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bool
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jack_proxy_read_conf_container(
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const char * address,
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void * callback_context,
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bool (* callback)(void * context, bool leaf, const char * address, char * child))
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{
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DBusMessage * request_ptr;
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DBusMessage * reply_ptr;
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DBusMessageIter top_iter;
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DBusMessageIter array_iter;
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const char * reply_signature;
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dbus_bool_t leaf; /* Whether children are parameters (true) or containers (false) */
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char * child;
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request_ptr = dbus_message_new_method_call(JACKDBUS_SERVICE, JACKDBUS_OBJECT, JACKDBUS_IFACE_CONFIGURE, "ReadContainer");
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if (request_ptr == NULL)
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{
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lash_error("dbus_message_new_method_call() failed.");
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return false;
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}
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dbus_message_iter_init_append(request_ptr, &top_iter);
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if (!add_address(&top_iter, address))
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{
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dbus_message_unref(request_ptr);
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return false;
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}
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// send message and get a handle for a reply
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reply_ptr = dbus_connection_send_with_reply_and_block(
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g_dbus_connection,
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request_ptr,
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DBUS_CALL_DEFAULT_TIMEOUT,
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&g_dbus_error);
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dbus_message_unref(request_ptr);
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if (reply_ptr == NULL)
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{
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lash_error("no reply from JACK server, error is '%s'", g_dbus_error.message);
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dbus_error_free(&g_dbus_error);
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return false;
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}
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reply_signature = dbus_message_get_signature(reply_ptr);
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if (strcmp(reply_signature, "bas") != 0)
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{
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lash_error("ReadContainer() reply signature mismatch. '%s'", reply_signature);
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dbus_message_unref(reply_ptr);
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return false;
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}
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dbus_message_iter_init(reply_ptr, &top_iter);
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dbus_message_iter_get_basic(&top_iter, &leaf);
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dbus_message_iter_next(&top_iter);
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dbus_message_iter_recurse(&top_iter, &array_iter);
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while (dbus_message_iter_get_arg_type(&array_iter) != DBUS_TYPE_INVALID)
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{
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dbus_message_iter_get_basic(&array_iter, &child);
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if (!callback(callback_context, leaf, address, child))
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{
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break;
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}
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dbus_message_iter_next(&array_iter);
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}
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dbus_message_unref(reply_ptr);
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return true;
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}
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bool
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get_variant(
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DBusMessageIter * iter_ptr,
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struct jack_parameter_variant * parameter_ptr)
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{
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DBusMessageIter variant_iter;
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int type;
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dbus_bool_t boolean;
|
|
dbus_int32_t int32;
|
|
dbus_uint32_t uint32;
|
|
char * string;
|
|
|
|
dbus_message_iter_recurse(iter_ptr, &variant_iter);
|
|
lash_debug("variant signature: '%s'", dbus_message_iter_get_signature(&variant_iter));
|
|
|
|
type = dbus_message_iter_get_arg_type(&variant_iter);
|
|
switch (type)
|
|
{
|
|
case DBUS_TYPE_INT32:
|
|
dbus_message_iter_get_basic(&variant_iter, &int32);
|
|
parameter_ptr->value.int32 = int32;
|
|
parameter_ptr->type = jack_int32;
|
|
return true;
|
|
case DBUS_TYPE_UINT32:
|
|
dbus_message_iter_get_basic(&variant_iter, &uint32);
|
|
parameter_ptr->value.uint32 = uint32;
|
|
parameter_ptr->type = jack_uint32;
|
|
return true;
|
|
case DBUS_TYPE_BYTE:
|
|
dbus_message_iter_get_basic(&variant_iter, ¶meter_ptr->value.byte);
|
|
parameter_ptr->type = jack_byte;
|
|
return true;
|
|
case DBUS_TYPE_STRING:
|
|
dbus_message_iter_get_basic(&variant_iter, &string);
|
|
string = strdup(string);
|
|
if (string == NULL)
|
|
{
|
|
lash_error("strdup failed.");
|
|
return false;
|
|
}
|
|
|
|
parameter_ptr->value.string = string;
|
|
parameter_ptr->type = jack_string;
|
|
return true;
|
|
case DBUS_TYPE_BOOLEAN:
|
|
dbus_message_iter_get_basic(&variant_iter, &boolean);
|
|
parameter_ptr->value.boolean = boolean;
|
|
parameter_ptr->type = jack_boolean;
|
|
return true;
|
|
}
|
|
|
|
lash_error("Unknown D-Bus parameter type %i", (int)type);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
jack_proxy_get_parameter_value(
|
|
const char * address,
|
|
bool * is_set_ptr,
|
|
struct jack_parameter_variant * parameter_ptr)
|
|
{
|
|
DBusMessage * request_ptr;
|
|
DBusMessage * reply_ptr;
|
|
DBusMessageIter top_iter;
|
|
const char * reply_signature;
|
|
dbus_bool_t is_set;
|
|
struct jack_parameter_variant default_value;
|
|
|
|
request_ptr = dbus_message_new_method_call(JACKDBUS_SERVICE, JACKDBUS_OBJECT, JACKDBUS_IFACE_CONFIGURE, "GetParameterValue");
|
|
if (request_ptr == NULL)
|
|
{
|
|
lash_error("dbus_message_new_method_call() failed.");
|
|
return false;
|
|
}
|
|
|
|
dbus_message_iter_init_append(request_ptr, &top_iter);
|
|
|
|
if (!add_address(&top_iter, address))
|
|
{
|
|
dbus_message_unref(request_ptr);
|
|
return false;
|
|
}
|
|
|
|
// send message and get a handle for a reply
|
|
reply_ptr = dbus_connection_send_with_reply_and_block(
|
|
g_dbus_connection,
|
|
request_ptr,
|
|
DBUS_CALL_DEFAULT_TIMEOUT,
|
|
&g_dbus_error);
|
|
|
|
dbus_message_unref(request_ptr);
|
|
|
|
if (reply_ptr == NULL)
|
|
{
|
|
lash_error("no reply from JACK server, error is '%s'", g_dbus_error.message);
|
|
dbus_error_free(&g_dbus_error);
|
|
return false;
|
|
}
|
|
|
|
reply_signature = dbus_message_get_signature(reply_ptr);
|
|
|
|
if (strcmp(reply_signature, "bvv") != 0)
|
|
{
|
|
lash_error("GetParameterValue() reply signature mismatch. '%s'", reply_signature);
|
|
dbus_message_unref(reply_ptr);
|
|
return false;
|
|
}
|
|
|
|
dbus_message_iter_init(reply_ptr, &top_iter);
|
|
|
|
dbus_message_iter_get_basic(&top_iter, &is_set);
|
|
dbus_message_iter_next(&top_iter);
|
|
|
|
if (!get_variant(&top_iter, &default_value))
|
|
{
|
|
dbus_message_unref(reply_ptr);
|
|
return false;
|
|
}
|
|
|
|
if (default_value.type == jack_string)
|
|
{
|
|
free(default_value.value.string);
|
|
}
|
|
|
|
dbus_message_iter_next(&top_iter);
|
|
|
|
if (!get_variant(&top_iter, parameter_ptr))
|
|
{
|
|
dbus_message_unref(reply_ptr);
|
|
return false;
|
|
}
|
|
|
|
dbus_message_unref(reply_ptr);
|
|
|
|
*is_set_ptr = is_set;
|
|
|
|
return true;
|
|
}
|