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Copy pathaudioBasicIO.py
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97 lines (83 loc) · 3.06 KB
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import os, glob, eyed3, ntpath, shutil
import scipy.io.wavfile as wavfile
def convertDirMP3ToWav(dirName, Fs, nC, useMp3TagsAsName = False):
'''
This function converts the MP3 files stored in a folder to WAV. If required, the output names of the WAV files are based on MP3 tags, otherwise the same names are used.
ARGUMENTS:
- dirName: the path of the folder where the MP3s are stored
- Fs: the sampling rate of the generated WAV files
- nC: the number of channesl of the generated WAV files
- useMp3TagsAsName: True if the WAV filename is generated on MP3 tags
'''
types = (dirName+os.sep+'*.mp3',) # the tuple of file types
filesToProcess = []
tag = eyeD3.Tag()
for files in types:
filesToProcess.extend(glob.glob(files))
for f in filesToProcess:
tag.link(f)
if useMp3TagsAsName:
artist = tag.getArtist()
title = tag.getTitle()
if len(title)>0 and len(artist)>0:
wavFileName = ntpath.split(f)[0] + os.sep + artist.replace(","," ") + " --- " + title.replace(","," ") + ".wav"
else:
wavFileName = f.replace(".mp3",".wav")
else:
wavFileName = f.replace(".mp3",".wav")
command = "avconv -i \"" + f + "\" -ar " +str(Fs) + " -ac " + str(nC) + " \"" + wavFileName + "\"";
print command
os.system(command.decode('unicode_escape').encode('ascii','ignore').replace("\0",""))
def convertFsDirWavToWav(dirName, Fs, nC):
'''
This function converts the WAV files stored in a folder to WAV using a different sampling freq and number of channels.
ARGUMENTS:
- dirName: the path of the folder where the WAVs are stored
- Fs: the sampling rate of the generated WAV files
- nC: the number of channesl of the generated WAV files
'''
types = (dirName+os.sep+'*.wav',) # the tuple of file types
filesToProcess = []
for files in types:
filesToProcess.extend(glob.glob(files))
newDir = dirName + os.sep + "Fs" + str(Fs) + "_" + "NC"+str(nC)
if os.path.exists(newDir) and newDir!=".":
shutil.rmtree(newDir)
os.makedirs(newDir)
for f in filesToProcess:
_, wavFileName = ntpath.split(f)
command = "avconv -i \"" + f + "\" -ar " +str(Fs) + " -ac " + str(nC) + " \"" + newDir + os.sep + wavFileName + "\"";
print command
os.system(command)
def readAudioFile(path):
'''
This function returns a numpy array that stores the audio samples of a specified WAV of AIFF file
'''
extension = os.path.splitext(path)[1]
try:
if extension.lower() == '.wav':
[Fs, x] = wavfile.read(path)
elif extension.lower() == '.aif' or extension.lower() == '.aiff':
s = aifc.open(path, 'r')
nframes = s.getnframes()
strsig = s.readframes(nframes)
x = numpy.fromstring(strsig, numpy.short).byteswap()
Fs = s.getframerate()
else:
print "Error in readAudioFile(): Unknown file type!"
return (-1,-1)
except IOError:
print "Error: file not found or other I/O error."
return (-1,-1)
return (Fs, x)
def stereo2mono(x):
'''
This function converts the input signal (stored in a numpy array) to MONO (if it is STEREO)
'''
if x.ndim==1:
return x
else:
if x.ndim==2:
return ( (x[:,1] / 2) + (x[:,0] / 2) )
else:
return -1