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 ApplyChanges(self, from_time=None, to_time=None):
"""
Return a channel with changed applied.
@param from_time (float)
@param to_time (float)
@return (Channel) new channel or None if nothing changed
"""
# Get the list of modifiable values from wx objects
fm = int(self._wxobj["framerate"][1].GetValue())
sp = int(int(self._wxobj["sampwidth"][1].GetValue())/8)
mul = float(self._wxobj["mul"][1].GetValue())
bias = int(self._wxobj["bias"][1].GetValue())
offset = self._wxobj["offset"][1].GetValue()
dirty = False
if from_time is None:
from_frame = 0
else:
from_frame = int( from_time * fm )
dirty = True
if to_time is None:
to_frame = self._channel.get_nframes()
else:
dirty = True
to_frame = int(to_time * fm)
channel = self._channel.extract_fragment(from_frame,to_frame)
# If something changed, apply this/these change-s to the channel
if fm != self._channel.get_framerate() or sp != self._channel.get_sampwidth() or mul != 1. or bias != 0 or offset is True:
wx.BeginBusyCursor()
b = wx.BusyInfo("Please wait while formatting data...")
channelfmt = ChannelFormatter( channel )
channelfmt.set_framerate(fm)
channelfmt.set_sampwidth(sp)
channelfmt.convert()
channelfmt.mul(mul)
channelfmt.bias(bias)
if offset is True:
channelfmt.remove_offset()
channel = channelfmt.get_channel()
dirty = True
b.Destroy()
b = None
wx.EndBusyCursor()
if dirty is True:
return channel
return None
def format_channel(channel, framerate, sampwith):
"""
Return a channel with the requested framerate and sampwidth.
"""
fm = channel.get_framerate()
sp = channel.get_sampwidth()
if fm != framerate or sp != sampwith:
formatter = ChannelFormatter( channel )
formatter.set_framerate( framerate )
formatter.set_sampwidth( sampwith )
formatter.convert()
return formatter.get_channel()
return channel
sys.exit(1)
# ----------------------------------------------------------------------------
print (time.strftime("%H:%M:%S"))
audio = audiodata.io.open(args.w)
# Get the expected channel
idx = audio.extract_channel(args.c-1)
# no more need of input data, can close
audio.close()
print (time.strftime("%H:%M:%S"))
# Do the job (do not modify the initial channel).
formatter = ChannelFormatter( audio.get_channel(idx) )
if args.r:
formatter.set_framerate(args.r)
if args.b:
formatter.set_sampwidth(args.b)
formatter.convert()
print (time.strftime("%H:%M:%S"))
# Save the converted channel
audio_out = AudioPCM()
audio_out.append_channel( formatter.channel )
audiodata.save( args.o, audio_out )
print (time.strftime("%H:%M:%S"))
# ----------------------------------------------------------------------------