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diff --git a/drumgizmo/input/jackmidi/jackclient.cc b/drumgizmo/input/jackmidi/jackclient.cc
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * jackclient.cc
+ *
+ * Sun Jul 20 21:48:44 CEST 2008
+ * Copyright 2008 Bent Bisballe Nyeng
+ * deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ * This file is part of DrumGizmo.
+ *
+ * DrumGizmo is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * DrumGizmo 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with DrumGizmo; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+#include "jackclient.h"
+
+extern "C"
+{
+ int _wrap_jack_process(jack_nframes_t nframes, void *arg){
+ return ((JackClient*)arg)->process(nframes);}
+} // extern "C"
+
+JackClient::JackClient()
+ : refcnt(0)
+{
+ jack_status_t status;
+
+ jack_client = jack_client_open("DrumGizmo", JackNullOption, &status);
+
+ jack_set_process_callback(jack_client, _wrap_jack_process, this);
+}
+
+JackClient::~JackClient()
+{
+ jack_client_close(jack_client);
+}
+
+void JackClient::addJackProcess(JackProcess *process)
+{
+ jack_processes.insert(process);
+}
+
+void JackClient::removeJackProcess(JackProcess *process)
+{
+ jack_processes.erase(process);
+}
+
+void JackClient::activate()
+{
+ if(!active) jack_activate(jack_client);
+ active = true;
+}
+
+int JackClient::process(jack_nframes_t nframes)
+{
+ std::set<JackProcess *>::iterator i = jack_processes.begin();
+ while(i != jack_processes.end()) {
+ JackProcess *jp = *i;
+ jp->jack_process(nframes);
+ i++;
+ }
+
+ return 0;
+}
+
+JackClient *jackclient = NULL;
+
+JackClient *init_jack_client()
+{
+ if(jackclient == NULL) jackclient = new JackClient();
+ jackclient->refcnt++;
+ return jackclient;
+
+}
+void close_jack_client()
+{
+ if(jackclient) {
+ jackclient->refcnt--;
+ if(jackclient->refcnt == 0) {
+ delete jackclient;
+ jackclient = NULL;
+ }
+ }
+}