import os
# these should really be provided from command lin
inFile = 'audio.wav'
cueFile = 'cue'
outFile = 'concat.wav'

f = open (cueFile,'r')
times = []
for l in f:
    times.append (l.replace ('\n',''))
f.close ()

timeargs = []
counter = 0
for t in times:
    couple = t.split (' ')
    startCut = couple[0].split (':')
    startCutSecs = int (startCut[0]) * 3600 + int (startCut[1]) * 60 + int (startCut[2])
    endCut = couple[1].split (':')
    endCutSecs = int (endCut[0]) * 3600 + int (endCut[1]) * 60 + int (endCut[2])
    totalCutSecs = str (endCutSecs - startCutSecs)
    if totalCutSecs < 0:
        print 'WARNING: negative cut!'
    d = {'start' : couple[0]}
    d['cut'] = totalCutSecs
    d['tempfile'] = 'chunk'+str (counter)+'.wav'
    d['commandline'] = 'sox ' + inFile + ' ' + d['tempfile']+ ' trim ' + d['start'] + ' ' + d['cut']
    timeargs.append (d)
    counter += 1

print 'Processing file:',inFile
print 'Using cuelist in file',cueFile,'\n'

concatFiles = ''
for t in timeargs:
    print 'Extracting from',t['start'],'for',t['cut'],'seconds'
    print '-- saving to file',t['tempfile']
    os.system (t['commandline'])
    concatFiles += t['tempfile']+' '
print 'OK'

print 'Concatenating files and saving to:',outFile
os.system ('sox '+concatFiles+' '+outFile)
print 'OK'

print 'Cleaning up temp files...'
for t in timeargs:
    os.remove (t['tempfile'])
print ' done.'