at mode change only send command to switch if the mode hast actually changed

1 files changed, 38 insertions, 37 deletions

diff --git a/switchctl.c b/switchctl.c
index b3cc643..ce32195 100644
--- a/switchctl.c
+++ b/switchctl.c
@@ -351,45 +351,46 @@ int process_cmd_mode(const char* param, int fd, cmd_t **cmd_q, options_t* opt)
       return 0;
     }
 
-        // swap master with standby channels
-
-    char* ch_from = NULL;
-    if(old_mode == MODE_MASTER && opt->channel_ == CHAN_MAIN)
-      ch_from = "master_main";
-    else if(old_mode == MODE_MASTER && opt->channel_ == CHAN_MUSIC)
-      ch_from = "master_music";
-    else if(old_mode == MODE_STANDBY && opt->channel_ == CHAN_MAIN)
-      ch_from = "standby_main";
-    else if(old_mode == MODE_STANDBY && opt->channel_ == CHAN_MUSIC)
-      ch_from = "standby_music";
-    else {
-      opt->mode_ = old_mode;
-      log_printf(ERROR, "EEE: mode: old config is illegal?!");
-      return 0;
-    }
-
-    char* ch_to = NULL;
-    if(opt->mode_ == MODE_MASTER && opt->channel_ == CHAN_MAIN)
-      ch_to = "master_main";
-    else if(opt->mode_ == MODE_MASTER && opt->channel_ == CHAN_MUSIC)
-      ch_to = "master_music";
-    else if(opt->mode_ == MODE_STANDBY && opt->channel_ == CHAN_MAIN)
-      ch_to = "standby_main";
-    else if(opt->mode_ == MODE_STANDBY && opt->channel_ == CHAN_MUSIC)
-      ch_to = "standby_music";
-    else {
-      opt->mode_ = old_mode;
-      log_printf(ERROR, "EEE: mode: current config is illegal?!");
-      return 0;
-    }
-
-    int ret = crossfade(ch_from, ch_to, fd, cmd_q, opt);
-    if(ret) {
-      opt->mode_ = old_mode;
-      if(ret > 0)
+        // swap master with standby channels only when mode has changed
+    if(old_mode != opt->mode_) {
+      char* ch_from = NULL;
+      if(old_mode == MODE_MASTER && opt->channel_ == CHAN_MAIN)
+        ch_from = "master_main";
+      else if(old_mode == MODE_MASTER && opt->channel_ == CHAN_MUSIC)
+        ch_from = "master_music";
+      else if(old_mode == MODE_STANDBY && opt->channel_ == CHAN_MAIN)
+        ch_from = "standby_main";
+      else if(old_mode == MODE_STANDBY && opt->channel_ == CHAN_MUSIC)
+        ch_from = "standby_music";
+      else {
+        opt->mode_ = old_mode;
+        log_printf(ERROR, "EEE: mode: old config is illegal?!");
         return 0;
+      }
       
-      return ret;
+      char* ch_to = NULL;
+      if(opt->mode_ == MODE_MASTER && opt->channel_ == CHAN_MAIN)
+        ch_to = "master_main";
+      else if(opt->mode_ == MODE_MASTER && opt->channel_ == CHAN_MUSIC)
+        ch_to = "master_music";
+      else if(opt->mode_ == MODE_STANDBY && opt->channel_ == CHAN_MAIN)
+        ch_to = "standby_main";
+      else if(opt->mode_ == MODE_STANDBY && opt->channel_ == CHAN_MUSIC)
+        ch_to = "standby_music";
+      else {
+        opt->mode_ = old_mode;
+        log_printf(ERROR, "EEE: mode: current config is illegal?!");
+        return 0;
+      }
+      
+      int ret = crossfade(ch_from, ch_to, fd, cmd_q, opt);
+      if(ret) {
+        opt->mode_ = old_mode;
+        if(ret > 0)
+          return 0;
+        
+        return ret;
+      }
     }
   }
   else {