Valaki el tudja magyarázni ezt a PYTHON programot?

Bocsi hogy pontatlan voltam, itt a kód, commentelve írom ami nem tiszta:

import wave

import struct

import sys

import csv

import numpy

from scipy.io import wavfile

from scipy.signal import resample

def write_wav(data, filename, framerate, amplitude):

wavfile = wave.open(filename,'w')

nchannels = 1

sampwidth = 2

framerate = framerate

nframes = len(data)

comptype = "NONE"

compname = "not compressed"

wavfile.setparams((nchannels,

sampwidth,

framerate,

nframes,

comptype,

compname))

frames = []

for s in data:

mul = int(s * amplitude)

frames.append(struct.pack('h', mul))

frames = ''.join(frames)

wavfile.writeframes(frames)

wavfile.close()

print("%s written" %(filename))

if __name__ == "__main__":

if len(sys.argv) <= 1:

print ("You must supply a filename to generate")

exit(-1)

for fname in sys.argv[1:]:

data = []

for time, value in csv.reader(open(fname, 'U'), delimiter=','):

try:

data.append(float(value))#Here you can see that the time column is skipped

except ValueError:

pass # Just skip it

arr = numpy.array(data)#Just organize all your samples into an array

# Normalize data

arr /= numpy.max(numpy.abs(data)) #Divide all your samples by the max sample value

filename_head, extension = fname.rsplit(".", 1)

data_resampled = resample( arr, len(data) )

wavfile.write('rec.wav', 16000, data_resampled) #resampling at 16khz

print ("File written succesfully !")

Bocsi, az elobb ugyetlenkedtem es elkuldtem kommentek nelkul... Igazabol nem ertem ugy az egeszet mi miert van, miert van szukseg arra a nagy if-re, meg azt sem tudom pontosan hova kellene beirjam a csv fileom nevet, tehat egy ilyen atfogo magyarazatra lenne szuksegem.

A csv file amit at szeretnek alakitani az itt van: [link] - en csak a "raw" oszlopbol szeretnek wav-t. Mivel latom a space-eket kitorli, feltoltom kep formalyaban is:

[link]

[link]

Koszonom szepen az idotoket es a valaszotokat.

import wave

import struct

import sys

import csv

import numpy

from scipy.io import wavfile

from scipy.signal import resample

def write_wav(data, filename, framerate, amplitude):

wavfile = wave.open(filename,'w')

nchannels = 1

sampwidth = 2

framerate = framerate ##nem ertem hogy mi is ez a framerate

nframes = len(data)

comptype = "NONE"

compname = "not compressed"

wavfile.setparams((nchannels, ## gondolom hogy ezekkel az ertekekkel

sampwidth, ## allitom be hogy milyen legyen a wav fileom

framerate,

nframes,

comptype,

compname))

frames = []

for s in data:

mul = int(s * amplitude) ## mi az az "s" es "mul"

frames.append(struct.pack('h', mul)) ## MIT CSINAL A PACK?

frames = ''.join(frames) ## mit csinal ez a sor?

wavfile.writeframes(frames) ## mit csinal ez a sor?

wavfile.close()

print("%s written" %(filename))

# egyaltalan miert van ez az egesz if?

if __name__ == "__main__": ## mikor irunk igy if-t, mi ennek az ertelme

if len(sys.argv) <= 1: ## miert igy van a feltetel megszabva?

print ("You must supply a filename to generate")

exit(-1)

for fname in sys.argv[1:]: #miert kell beagyazott ciklus?

data = []

for time, value in csv.reader(open(fname, 'U'), delimiter=','): ## miert igy van a feltetel megszabva

try:

data.append(float(value))#Here you can see that the time column is skipped

except ValueError:

pass # Just skip it

arr = numpy.array(data)#Just organize all your samples into an array

# Normalize data

arr /= numpy.max(numpy.abs(data)) #Divide all your samples by the max sample value

filename_head, extension = fname.rsplit(".", 1)

data_resampled = resample( arr, len(data) )

wavfile.write('rec.wav', 16000, data_resampled) #resampling at 16khz

print ("File written succesfully !")