From be3a2a50f84ef87c3a1eb6655e44db958862b781 Mon Sep 17 00:00:00 2001
From: Yang Zhou <goat.zhou@qq.com>
Date: Thu, 24 Mar 2022 13:30:35 +0800
Subject: [PATCH] fix normalizer bug

---
 speechx/speechx/frontend/normalizer.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/speechx/speechx/frontend/normalizer.cc b/speechx/speechx/frontend/normalizer.cc
index 1adddb40..52412561 100644
--- a/speechx/speechx/frontend/normalizer.cc
+++ b/speechx/speechx/frontend/normalizer.cc
@@ -107,7 +107,7 @@ void CMVN::Accept(const kaldi::VectorBase<kaldi::BaseFloat>& inputs) {
 }
 
 bool CMVN::Read(kaldi::Vector<BaseFloat>* feats) {
-    if (base_extractor_->Read(feats) == false) {
+    if (base_extractor_->Read(feats) == false || feats->Dim() == 0) {
         return false;
     }
     Compute(feats);
-- 
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