Fix minor issues in NekoFilter UI

source/backend/native/nekofilter/ui.c

@@ -268,6 +268,20 @@ nekoui_quit(
 {
   write(control_ptr->send_pipe, "quit\n", 5);
   control_ptr->visible = false;
+  
+  /* for a while wait child to exit, we dont like zombie processes */
+  if (!wait_child(control_ptr->pid))
+  {
+    fprintf(stderr, "force killing misbehaved child %d (exit)\n", (int)control_ptr->pid);
+    if (kill(control_ptr->pid, SIGKILL) == -1)
+    {
+      fprintf(stderr, "kill() failed: %s (exit)\n", strerror(errno));
+    }
+    else
+    {
+      wait_child(control_ptr->pid);
+    }
+  }
 }
 
 #if defined(FORK_TIME_MEASURE)
@@ -324,7 +338,7 @@ nekoui_instantiate(
   char ui_send_pipe[100];
   int oldflags;
   FORK_TIME_MEASURE_VAR;
-  const char * argv[5];
+  const char * argv[6];
   int ret;
   int i;
   char ch;
@@ -361,6 +375,9 @@ nekoui_instantiate(
 
   strcpy(filename, bundle_path);
   strcat(filename, UI_EXECUTABLE);
+  
+  char sample_rate_str[12] = { 0 };
+  snprintf(sample_rate_str, 12, "%g", host->get_sample_rate(host->handle));
 
   control_ptr->running = false;
   control_ptr->visible = false;
@@ -369,9 +386,10 @@ nekoui_instantiate(
 
   argv[0] = "python";
   argv[1] = filename;
-  argv[2] = ui_recv_pipe;       /* reading end */
-  argv[3] = ui_send_pipe;       /* writting end */
-  argv[4] = NULL;
+  argv[2] = sample_rate_str;
+  argv[3] = ui_recv_pipe;       /* reading end */
+  argv[4] = ui_send_pipe;       /* writting end */
+  argv[5] = NULL;
 
   FORK_TIME_MEASURE_BEGIN;
 

source/backend/native/nekofilter/ui.py

@@ -621,8 +621,8 @@ class Knob(gtk.VBox):
         return False
 
 class filter_band:
-    def __init__(self):
-        self.fsamp = 48e3
+    def __init__(self, sample_rate):
+        self.fsamp = sample_rate
 
     def set_params(self, freq, bandw, gain):
         freq_ratio = freq / self.fsamp
@@ -827,9 +827,9 @@ class frequency_response(gtk.DrawingArea):
             cairo_ctx.show_text(label)
             cairo_ctx.stroke()
 
-    def add_filter(self, label, adj_hz, adj_db, adj_bw, color):
+    def add_filter(self, label, sample_rate, adj_hz, adj_db, adj_bw, color):
         #print "filter %s added (%.2f Hz, %.2f dB, %.2f bw)" % (label, adj_hz.value, adj_db.value, adj_bw.value)
-        filter = filter_band()
+        filter = filter_band(sample_rate)
         filter.enabled = False
         filter.label = label
         filter.color = color
@@ -880,9 +880,11 @@ class filter_ui:
 
         if self.fake:
             self.shown = False
+            self.sample_rate  = 48e3
         else:
-            self.recv_pipe_fd = int(argv[1])
-            self.send_pipe_fd = int(argv[2])
+            self.sample_rate  = float(argv[1])
+            self.recv_pipe_fd = int(argv[2])
+            self.send_pipe_fd = int(argv[3])
 
             oldflags = fcntl.fcntl(self.recv_pipe_fd, fcntl.F_GETFL)
             fcntl.fcntl(self.recv_pipe_fd, fcntl.F_SETFL, oldflags | os.O_NONBLOCK)
@@ -1006,6 +1008,7 @@ class filter_ui:
 
             self.fr.add_filter(
                 str(i + 1),
+                self.sample_rate,
                 self.ports[port_index - 3]['adj'], # frequency
                 self.ports[port_index - 1]['adj'], # gain
                 self.ports[port_index - 2]['adj'], # bandwidth