feat: add argument for changing model output dimension

modelscope/trainers/audio/kws_farfield_trainer.py

@@ -69,11 +69,14 @@ class KWSFarfieldTrainer(BaseTrainer):
 
         super().__init__(cfg_file, arg_parse_fn)
 
-        self.model = self.build_model()
-        self.work_dir = work_dir
         # the number of model output dimension
         # should update config outside the trainer, if user need more wake word
+        num_syn = kwargs.get('num_syn', None)
+        if num_syn:
+            self.cfg.model.num_syn = num_syn
         self._num_classes = self.cfg.model.num_syn
+        self.model = self.build_model()
+        self.work_dir = work_dir
 
         if kwargs.get('launcher', None) is not None:
             init_dist(kwargs['launcher'])