【audiotools】replace scale op (#4017)

* fix div

* fix

paddlespeech/audiotools/core/_julius.py

@@ -131,7 +131,8 @@ class ResampleFrac(paddle.nn.Layer):
         idx = paddle.arange(
             -self._width, self._width + self.old_sr, dtype="float32")
         for i in range(self.new_sr):
-            t = (-i / self.new_sr + idx / self.old_sr) * sr
+            t = (-i / self.new_sr + idx / paddle.full(idx.shape, self.old_sr)
+                 ) * sr
             t = paddle.clip(t, -self.zeros, self.zeros)
             t *= math.pi
             window = paddle.cos(t / self.zeros / 2)**2

tests/unit/audiotools/test_audiotools.sh

@@ -1,5 +1,5 @@
-wget  https://paddlespeech.cdn.bcebos.com/PaddleAudio/audio_tools/audio.tar.gz
-wget  https://paddlespeech.cdn.bcebos.com/PaddleAudio/audio_tools/regression.tar.gz
+wget -c https://paddlespeech.cdn.bcebos.com/PaddleAudio/audio_tools/audio.tar.gz
+wget -c https://paddlespeech.cdn.bcebos.com/PaddleAudio/audio_tools/regression.tar.gz
 tar -zxvf audio.tar.gz
 tar -zxvf regression.tar.gz
-python -m pytest
+python -m pytest