added inital osc support

1 files changed, 166 insertions, 0 deletions

diff --git a/client/osc.c b/client/osc.c
new file mode 100644
index 0000000..4ecc28a
--- /dev/null
+++ b/client/osc.c
@@ -0,0 +1,166 @@
+/*
+ *  dolmetschctl
+ *
+ *
+ *  Copyright (C) 2015 Christian Pointner <equinox@spreadspace.org>
+ *
+ *  This file is part of dolmetschctl.
+ *
+ *  dolmetschctl 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 3 of the License, or
+ *  any later version.
+ *
+ *  dolmetschctl 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 dolmetschctl. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <error.h>
+#include <assert.h>
+
+#include "osc.h"
+
+
+static void print_error(int num, const char *msg, const char *path)
+{
+  error(0, 0, "liblo server error %d in path %s: %s", num, path, msg);
+}
+
+static int lang_handler(const char *path, const char *types, lo_arg ** argv,
+                    int argc, lo_message msg, void *user_data)
+{
+  if(argc != 1 || !lo_is_string_type((lo_type)types[0]))
+    return 1;
+
+  lo_address from = lo_message_get_source(msg);
+  const char* host = lo_address_get_hostname(from);
+  const char* port = lo_address_get_port(from);
+  assert(host && port);
+
+  osc_t* o = (osc_t*)user_data;
+  assert(o);
+  osc_task_t* task = malloc(sizeof(osc_task_t));
+  assert(task);
+
+  task->self_ = o;
+  task->state_ = 0;
+  assert((task->lang_ = strdup(&(argv[0]->s))));
+  task->addr_ = lo_address_new(host, port);
+  assert(task->addr_);
+  task->msg_ = lo_message_new();
+  assert(task->msg_);
+  assert(!lo_message_add(task->msg_, "s", task->lang_));
+
+  assert(slist_add(&(o->tasks_), task));
+
+  return 0;
+}
+
+void free_osc_task(void* ptr)
+{
+  osc_task_t* task = (osc_task_t*)ptr;
+
+  lo_message_free(task->msg_);
+  lo_address_free(task->addr_);
+  free(task->lang_);
+  free(task);
+}
+
+void osc_lang_switch_task(void* data)
+{
+  assert(data);
+  osc_task_t* d = data;
+
+  lo_send_message_from(d->addr_, d->self_->server_, "/lang/switch", d->msg_);
+  slist_remove(&(d->self_->tasks_), d);
+}
+
+int osc_init(osc_t* o, const char* host, const char* port)
+{
+  assert(o != NULL);
+
+  o->server_ = NULL;
+  o->target_ = lo_address_new(host, port);
+  slist_init(&(o->tasks_), free_osc_task);
+
+  if(!port)
+    return 0;
+
+  o->server_ = lo_server_new(NULL, print_error);
+  if(!o->server_)
+    return -1;
+
+  if(!lo_server_add_method(o->server_, "/lang/ack", "s", lang_handler, (void*)o))
+    return -1;
+
+  return 0;
+}
+
+
+int osc_get_poll_fd_count(osc_t* o)
+{
+  assert(o);
+
+  if(!o->server_)
+    return 0;
+
+  return 1;
+}
+
+int osc_get_poll_fds(osc_t* o, struct pollfd *pfds, int npfds)
+{
+  assert(o);
+
+  if(!o->server_)
+    return 0;
+
+  pfds[0].fd = lo_server_get_socket_fd(o->server_);
+  pfds[0].events = POLLIN;
+  pfds[0].revents = 0;
+
+  return 0;
+}
+
+//int osc_handle_revents(osc_t* o, struct pollfd *pfds, int npfds, midi_t* m)
+int osc_handle_revents(osc_t* o, struct pollfd *pfds, int npfds)
+{
+  assert(o);
+
+  if(!o->server_)
+    return 0;
+
+  if(pfds[0].revents & (POLLERR | POLLHUP | POLLNVAL)) {
+    error(0, 0, "OSC: got POLLERR, POLLHUP or POLLNVAL");
+    return -1;
+  }
+  if(!(pfds[0].revents & POLLIN))
+    return 0;
+
+  lo_server_recv_noblock(o->server_, 0);
+
+  int ret = 0;
+  slist_element_t* tmp;
+  for(tmp = o->tasks_.first_; tmp; tmp = tmp->next_) {
+    osc_task_t* d = (osc_task_t*)(tmp->data_);
+    if(d->state_ == 0) {
+//      ret = midi_switch_lang(x, d->lang_, &osc_lang_switch_task, d);
+      if(ret)
+        break;
+
+      d->state_ = 1;
+    }
+  }
+
+
+  return ret;
+}