Merge pull request #165 from sp-nitech/istft_out_len [skip ci]

Fix output length truncation for center=True

Author: takenori-y

.github/workflows/ci.yml

@@ -29,10 +29,10 @@ jobs:
 
     steps:
       - name: Clone
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
       - name: Python
-        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
         with:
           python-version: ${{ matrix.python }}
           architecture: x64
@@ -52,7 +52,7 @@ jobs:
         run: make test-all OPT="--dtype double"
 
       - name: Coverage
-        uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2 # v6.0.0
+        uses: codecov/codecov-action@fb8b3582c8e4def4969c97caa2f19720cb33a72f # v7.0.0
         with:
           fail_ci_if_error: true
           files: ./coverage.xml

diffsptk/modules/unframe.py

@@ -181,6 +181,8 @@ def _forward(
             raise ValueError("Input must be at least 2D tensor.")
 
         N = y.size(-2)
+        if out_length is None and center:
+            out_length = N * frame_period
 
         if 4 <= d:
             batch_dims = y.size()[:-2]