support cpu training, use cpu training on mac

GPT_SoVITS/s1_train.py

@@ -118,16 +118,16 @@ def main(args):
     os.environ["MASTER_ADDR"]="localhost"
     trainer: Trainer = Trainer(
         max_epochs=config["train"]["epochs"],
-        accelerator="gpu",
+        accelerator="gpu" if torch.cuda.is_available() else "cpu",
         # val_check_interval=9999999999999999999999,###不要验证
         # check_val_every_n_epoch=None,
         limit_val_batches=0,
-        devices=-1,
+        devices=-1 if torch.cuda.is_available() else 1,
         benchmark=False,
         fast_dev_run=False,
-        strategy = "auto" if torch.backends.mps.is_available() else DDPStrategy(
+        strategy = DDPStrategy(
             process_group_backend="nccl" if platform.system() != "Windows" else "gloo"
-        ),  # mps 不支持多节点训练
+        ) if torch.cuda.is_available() else "auto",
         precision=config["train"]["precision"],
         logger=logger,
         num_sanity_val_steps=0,