Changeset efa62ce for python

Timestamp:

Jul 10, 2015, 12:59:23 AM (10 years ago)

Author:

Paul Brossier <piem@piem.org>

Branches:

feature/autosink, feature/cnn, feature/cnn_org, feature/constantq, feature/crepe, feature/crepe_org, feature/pitchshift, feature/pydocstrings, feature/timestretch, fix/ffmpeg5, master, pitchshift, sampler, timestretch, yinfft+

Children:

5a7e2c3

Parents:

5e394ecc

Message:

ext/py-musicutils.c: complete window implementation

Location:

python

Files:

• ext/py-musicutils.c (modified) (1 diff)
• ext/py-musicutils.h (modified) (1 diff)
• tests/test_musicutils.py (modified) (2 diffs)

python/ext/py-musicutils.c

@@ -4 +4 @@
 Py_aubio_window(PyObject *self, PyObject *args)
 {
-  PyObject *output = NULL;
   char_t *wintype = NULL;
   uint_t winlen = 0;
-  fvec_t *window;
+  fvec_t *window = NULL;
 
-  if (!PyArg_ParseTuple (args, "|sd", &wintype, &winlen)) {
-    PyErr_SetString (PyExc_ValueError,
-        "failed parsing arguments");
+  if (!PyArg_ParseTuple (args, "|sI", &wintype, &winlen)) {
+    PyErr_SetString (PyExc_ValueError, "failed parsing arguments");
     return NULL;
   }
 
-  //return (PyObject *) PyAubio_CFvecToArray(vec);
-  Py_RETURN_NONE;
+  window = new_aubio_window(wintype, winlen);
+  if (window == NULL) {
+    PyErr_SetString (PyExc_ValueError, "failed computing window");
+    return NULL;
+  }
+
+  return (PyObject *) PyAubio_CFvecToArray(window);
 }

python/ext/py-musicutils.h

@@ -10 +10 @@
 "-------\n"
 "\n"
-">>> window('hanningz', 1024)";
+">>> window('hanningz', 1024)\n"
+"array([  0.00000000e+00,   9.41753387e-06,   3.76403332e-05, ...,\n"
+"         8.46982002e-05,   3.76403332e-05,   9.41753387e-06], dtype=float32)";
 
 PyObject * Py_aubio_window(PyObject *self, PyObject *args);

python/tests/test_musicutils.py

@@ -2 +2 @@
 
 from numpy.testing import TestCase
+from numpy.testing.utils import assert_almost_equal
 from aubio import window
 
@@ -25 +26 @@
             self.fail('non-integer window length does not raise a ValueError')
 
+    def test_compute_hanning_1024(self):
+        from numpy import cos, arange
+        from math import pi
+        size = 1024
+        aubio_window = window("hanning", size)
+        numpy_window = .5 - .5 * cos(2. * pi * arange(size) / size)
+        assert_almost_equal(aubio_window, numpy_window)
+
 if __name__ == '__main__':
     from unittest import main