[tests] add parse_file_samplerate to fetch samplerate from path

[aubio.git] / python / tests / utils.py

diff --git a/python/tests/utils.py b/python/tests/utils.py
index 4e4ac71..4b41488 100644 (file)
--- a/python/tests/utils.py
+++ b/python/tests/utils.py
@@ -1,16 +1,16 @@
 #! /usr/bin/env python
 
 import os
+import re
 import glob
 import numpy as np
 from tempfile import mkstemp
 
+DEFAULT_SOUND = '22050Hz_5s_brownnoise.wav'
+
 def array_from_text_file(filename, dtype = 'float'):
-    filename = os.path.join(os.path.dirname(__file__), filename)
-    with open(filename) as f:
-        lines = f.readlines()
-    return np.array([line.split() for line in lines],
-            dtype = dtype)
+    realpathname = os.path.join(os.path.dirname(__file__), filename)
+    return np.loadtxt(realpathname, dtype = dtype)
 
 def list_all_sounds(rel_dir):
     datadir = os.path.join(os.path.dirname(__file__), rel_dir)
@@ -21,7 +21,11 @@ def get_default_test_sound(TestCase, rel_dir = 'sounds'):
     if len(all_sounds) == 0:
         TestCase.skipTest("please add some sounds in \'python/tests/sounds\'")
     else:
-        return all_sounds[0]
+        default_sound = all_sounds[0]
+        if DEFAULT_SOUND in map(os.path.basename, all_sounds):
+            while os.path.basename(default_sound) != DEFAULT_SOUND:
+                default_sound = all_sounds.pop(0)
+        return default_sound
 
 def get_tmp_sink_path():
     fd, path = mkstemp()
@@ -29,7 +33,13 @@ def get_tmp_sink_path():
     return path
 
 def del_tmp_sink_path(path):
-    os.unlink(path)
+    try:
+        os.unlink(path)
+    except WindowsError as e:
+        # removing the temporary directory sometimes fails on windows
+        import warnings
+        errmsg = "failed deleting temporary file {:s} ({:s})"
+        warnings.warn(UserWarning(errmsg.format(path, repr(e))))
 
 def array_from_yaml_file(filename):
     import yaml
@@ -68,3 +78,16 @@ def count_files_in_directory(samples_dir):
                 if file_path:
                     total_files += 1
     return total_files
+
+def parse_file_samplerate(soundfile):
+    samplerate = None
+    # parse samplerate
+    re_sr = re.compile(r'/([0-9]{4,})Hz_.*')
+    match_samplerate = re_sr.findall(soundfile)
+    if match_samplerate:
+        samplerate = int(match_samplerate[0])
+    else:
+        import warnings
+        warnings.warn(UserWarning("could not parse samplerate for {:s}"
+            .format(soundfile)))
+    return samplerate