ref: 81fe32734168e80d53cd575535a63ce99b1eb6a0
dir: /python/demos/aubiocut/
#! /usr/bin/env python
""" this file was written by Paul Brossier
it is released under the GNU/GPL license.
"""
import sys
#from aubio.task import *
usage = "usage: %s [options] -i soundfile" % sys.argv[0]
def parse_args():
from optparse import OptionParser
parser = OptionParser(usage=usage)
parser.add_option("-i", "--input", action = "store", dest = "source_file",
help="input sound file to analyse", metavar = "<source_file>")
parser.add_option("-m","--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_option("-b","--beat",
action="store_true", dest="beat", default=False,
help="use beat locations")
parser.add_option("-S","--silencecut",
action="store_true", dest="silencecut", default=False,
help="use silence locations")
parser.add_option("-s","--silence",
metavar = "<value>",
action="store", dest="silence", default=-70,
help="silence threshold [default=-70]")
"""
# algorithm parameters
parser.add_option("--samplerate",
metavar = "<freq>", type='int',
action="store", dest="samplerate", default=0,
help="samplerate at which the file should be represented")
parser.add_option("-B","--bufsize",
action="store", dest="bufsize", default=512,
metavar = "<size>",
help="buffer size [default=512]")
parser.add_option("-H","--hopsize",
metavar = "<size>",
action="store", dest="hopsize", default=256,
help="overlap size [default=256]")
parser.add_option("-t","--threshold",
metavar = "<value>", type="float",
action="store", dest="threshold", default=0.3,
help="onset peak picking threshold [default=0.3]")
"""
parser.add_option("-c","--cut",
action="store_true", dest="cut", default=False,
help="cut input sound file at detected labels \
best used with option -L")
parser.add_option("-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_option("-C","--dcthreshold",
metavar = "<value>",
action="store", dest="dcthreshold", default=1.,
help="onset peak picking DC component [default=1.]")
parser.add_option("-M","--mintol",
metavar = "<value>",
action="store", dest="mintol", default=0.048,
help="minimum inter onset interval [default=0.048]")
parser.add_option("-L","--localmin",
action="store_true", dest="localmin", default=False,
help="use local minima after peak detection")
parser.add_option("-d","--derivate",
action="store_true", dest="derivate", default=False,
help="derivate onset detection function")
parser.add_option("-z","--zerocross",
metavar = "<value>",
action="store", dest="zerothres", default=0.008,
help="zero-crossing threshold for slicing [default=0.00008]")
"""
# plotting functions
"""
parser.add_option("-p","--plot",
action="store_true", dest="plot", default=False,
help="draw plot")
parser.add_option("-x","--xsize",
metavar = "<size>",
action="store", dest="xsize", default=1.,
type='float', help="define xsize for plot")
parser.add_option("-y","--ysize",
metavar = "<size>",
action="store", dest="ysize", default=1.,
type='float', help="define ysize for plot")
parser.add_option("-f","--function",
action="store_true", dest="func", default=False,
help="print detection function")
parser.add_option("-n","--no-onsets",
action="store_true", dest="nplot", default=False,
help="do not plot detected onsets")
parser.add_option("-O","--outplot",
metavar = "<output_image>",
action="store", dest="outplot", default=None,
help="save plot to output.{ps,png}")
parser.add_option("-F","--spectrogram",
action="store_true", dest="spectro", default=False,
help="add spectrogram to the plot")
"""
parser.add_option("-v","--verbose",
action="store_true", dest="verbose", default=True,
help="make lots of noise [default]")
parser.add_option("-q","--quiet",
action="store_false", dest="verbose", default=True,
help="be quiet")
(options, args) = parser.parse_args()
if not options.source_file:
print "no file name given\n", usage
sys.exit(1)
return options, args
if __name__ == '__main__':
options, args = parse_args()
hopsize = options.hopsize
bufsize = options.bufsize
samplerate = options.samplerate
source_file = options.source_file
from aubio import onset, source
s = source(source_file, samplerate, hopsize)
if samplerate == 0: samplerate = s.get_samplerate()
o = onset(options.onset_method, bufsize, hopsize)
o.set_threshold(options.threshold)
timestamps = []
block_read = 0
while True:
samples, read = s()
is_onset = o(samples)
if is_onset:
this_onset = (block_read * hopsize - is_onset[0])
if options.verbose:
print "%.4f" % ( this_onset / samplerate )
timestamps.append (this_onset)
block_read += 1
if read < hopsize: break
# print some info
duration = float ( block_read * hopsize + read ) / samplerate
nstamps = len(timestamps)
info = 'found %(nstamps)d timestamps in %(source_file)s' % locals()
info += ' (read %(duration).2fs at %(samplerate)dHz)\n' % locals()
sys.stderr.write(info)