def test_Mix(self):
self._sample_1.extract_channel(0)
self._sample_2.extract_channel(0)
formatter1 = ChannelFormatter(self._sample_1.get_channel(0))
formatter1.set_framerate(16000)
formatter1.set_sampwidth(2)
formatter1.convert()
formatter2 = ChannelFormatter(self._sample_2.get_channel(0))
formatter2.set_framerate(16000)
formatter2.set_sampwidth(2)
formatter2.convert()
mixer = ChannelsMixer()
mixer.append_channel(formatter1.get_channel())
mixer.append_channel(formatter2.get_channel())
mixer.norm_length()
self.assertEqual(mixer.get_channel(0).get_nframes(), mixer.get_channel(1).get_nframes())
newchannel = mixer.mix()
self.assertEqual(newchannel.get_nframes(), mixer.get_channel(0).get_nframes())
self.assertEqual(newchannel.get_nframes(), mixer.get_channel(1).get_nframes())
def normalize_channels( settings, p=None ):
"""
Normalize the length of channels of the settings.
@param settings: a list of dictionaries with extracted information from a settings file.
@param p is a progress dialog
"""
norm = ChannelsMixer()
if p: p.update(0.25, "Load channels to normalize. ")
for channel in settings:
norm.append_channel( channel['channel'] )
if p: p.update(0.50, "Normalize length of each channel... ")
norm.norm_length()
if p: p.update(0.90, "Save normalized channels. ")
for i,channel in enumerate(settings):
channel['channel'] = norm.get_channel(i)
