ref: e7edf9286e9966e4207f269248f871b72b25f1af
dir: /python/demos/demo_slicing.py/
#! /usr/bin/env python
import sys
import os.path
from aubio import source, sink
if __name__ == '__main__':
if len(sys.argv) < 3:
print('usage: %s <inputfile> <duration>' % sys.argv[0])
sys.exit(1)
source_file = sys.argv[1]
duration = float(sys.argv[2])
source_base_name, source_ext = os.path.splitext(os.path.basename(source_file))
hopsize = 256
slice_n, total_frames_written, read = 0, 0, hopsize
def new_sink_name(source_base_name, slice_n, duration = duration):
return source_base_name + '_%02.3f' % (slice_n*duration) + '.wav'
f = source(source_file, 0, hopsize)
samplerate = f.samplerate
g = sink(new_sink_name(source_base_name, slice_n), samplerate)
#print "new slice:", slice_n, 0, "+", 0, "=", 0
while read == hopsize:
vec, read = f()
start_of_next_region = int(duration * samplerate * (slice_n + 1))
remaining = start_of_next_region - total_frames_written
# number of samples remaining is less than what we got
if remaining <= read:
# write remaining samples from current region
g(vec[0:remaining], remaining)
# close this file
del g
#print "new slice", slice_n, total_frames_written, "+", remaining, "=", start_of_next_region
slice_n += 1
# create a new file for the new region
g = sink(new_sink_name(source_base_name, slice_n), samplerate)
# write the remaining samples in the new file
g(vec[remaining:read], read - remaining)
else:
g(vec[0:read], read)
total_frames_written += read
total_duration = total_frames_written / float(samplerate)
slice_n += 1
outstr = 'created %(slice_n)s slices from %(source_base_name)s%(source_ext)s' % locals()
outstr += ' (total duration %(total_duration).2fs)' % locals()
print(outstr)
# close source and sink files
del f, g