ref: 71b8af22b3c21324085958c1ece2b16b36d35ece
dir: /python/lib/aubio/cut.py/
#! /usr/bin/env python
""" this file was written by Paul Brossier
it is released under the GNU/GPL license.
"""
import sys
from aubio.cmd import AubioArgumentParser
def aubio_cut_parser():
parser = AubioArgumentParser()
parser.add_input()
parser.add_argument("-O","--onset-method",
action="store", dest="onset_method", default='default',
metavar = "<onset_method>",
help="onset detection method [default=default] \
complexdomain|hfc|phase|specdiff|energy|kl|mkl")
# cutting methods
parser.add_argument("-b","--beat",
action="store_true", dest="beat", default=False,
help="slice at beat locations")
"""
parser.add_argument("-S","--silencecut",
action="store_true", dest="silencecut", default=False,
help="use silence locations")
parser.add_argument("-s","--silence",
metavar = "<value>",
action="store", dest="silence", default=-70,
help="silence threshold [default=-70]")
"""
# algorithm parameters
parser.add_buf_hop_size()
parser.add_argument("-t","--threshold", "--onset-threshold",
metavar = "<threshold>", type=float,
action="store", dest="threshold", default=0.3,
help="onset peak picking threshold [default=0.3]")
parser.add_argument("-c","--cut",
action="store_true", dest="cut", default=False,
help="cut input sound file at detected labels")
parser.add_minioi()
"""
parser.add_argument("-D","--delay",
action = "store", dest = "delay", type = float,
metavar = "<seconds>", default=0,
help="number of seconds to take back [default=system]\
default system delay is 3*hopsize/samplerate")
parser.add_argument("-C","--dcthreshold",
metavar = "<value>",
action="store", dest="dcthreshold", default=1.,
help="onset peak picking DC component [default=1.]")
parser.add_argument("-L","--localmin",
action="store_true", dest="localmin", default=False,
help="use local minima after peak detection")
parser.add_argument("-d","--derivate",
action="store_true", dest="derivate", default=False,
help="derivate onset detection function")
parser.add_argument("-z","--zerocross",
metavar = "<value>",
action="store", dest="zerothres", default=0.008,
help="zero-crossing threshold for slicing [default=0.00008]")
# plotting functions
parser.add_argument("-p","--plot",
action="store_true", dest="plot", default=False,
help="draw plot")
parser.add_argument("-x","--xsize",
metavar = "<size>",
action="store", dest="xsize", default=1.,
type=float, help="define xsize for plot")
parser.add_argument("-y","--ysize",
metavar = "<size>",
action="store", dest="ysize", default=1.,
type=float, help="define ysize for plot")
parser.add_argument("-f","--function",
action="store_true", dest="func", default=False,
help="print detection function")
parser.add_argument("-n","--no-onsets",
action="store_true", dest="nplot", default=False,
help="do not plot detected onsets")
parser.add_argument("-O","--outplot",
metavar = "<output_image>",
action="store", dest="outplot", default=None,
help="save plot to output.{ps,png}")
parser.add_argument("-F","--spectrogram",
action="store_true", dest="spectro", default=False,
help="add spectrogram to the plot")
"""
parser.add_slicer_options()
parser.add_verbose_help()
return parser
def _cut_analyze(options):
hopsize = options.hop_size
bufsize = options.buf_size
samplerate = options.samplerate
source_uri = options.source_uri
# analyze pass
from aubio import onset, tempo, source
s = source(source_uri, samplerate, hopsize)
if samplerate == 0:
samplerate = s.samplerate
options.samplerate = samplerate
if options.beat:
o = tempo(options.onset_method, bufsize, hopsize, samplerate=samplerate)
else:
o = onset(options.onset_method, bufsize, hopsize, samplerate=samplerate)
if options.minioi:
if options.minioi.endswith('ms'):
o.set_minioi_ms(int(options.minioi[:-2]))
elif options.minioi.endswith('s'):
o.set_minioi_s(int(options.minioi[:-1]))
else:
o.set_minioi(int(options.minioi))
o.set_threshold(options.threshold)
timestamps = []
total_frames = 0
while True:
samples, read = s()
if o(samples):
timestamps.append (o.get_last())
if options.verbose: print ("%.4f" % o.get_last_s())
total_frames += read
if read < hopsize: break
del s
return timestamps, total_frames
def _cut_slice(options, timestamps):
# cutting pass
nstamps = len(timestamps)
if nstamps > 0:
# generate output files
from aubio.slicing import slice_source_at_stamps
timestamps_end = None
if options.cut_every_nslices:
timestamps = timestamps[::options.cut_every_nslices]
nstamps = len(timestamps)
if options.cut_until_nslices and options.cut_until_nsamples:
print ("warning: using cut_until_nslices, but cut_until_nsamples is set")
if options.cut_until_nsamples:
timestamps_end = [t + options.cut_until_nsamples for t in timestamps[1:]]
timestamps_end += [ 1e120 ]
if options.cut_until_nslices:
timestamps_end = [t for t in timestamps[1 + options.cut_until_nslices:]]
timestamps_end += [ 1e120 ] * (options.cut_until_nslices + 1)
slice_source_at_stamps(options.source_uri,
timestamps, timestamps_end = timestamps_end,
output_dir = options.output_directory,
samplerate = options.samplerate,
create_first = options.create_first)
def main():
parser = aubio_cut_parser()
options = parser.parse_args()
if not options.source_uri and not options.source_uri2:
sys.stderr.write("Error: no file name given\n")
parser.print_help()
sys.exit(1)
elif options.source_uri2 is not None:
options.source_uri = options.source_uri2
# analysis
timestamps, total_frames = _cut_analyze(options)
# print some info
duration = float (total_frames) / float(options.samplerate)
base_info = '%(source_uri)s' % {'source_uri': options.source_uri}
base_info += ' (total %(duration).2fs at %(samplerate)dHz)\n' % \
{'duration': duration, 'samplerate': options.samplerate}
info = "found %d timestamps in " % len(timestamps)
info += base_info
sys.stderr.write(info)
if options.cut:
_cut_slice(options, timestamps)
info = "created %d slices from " % len(timestamps)
info += base_info
sys.stderr.write(info)