70 lines
2.5 KiB
Python
70 lines
2.5 KiB
Python
from bitarray import bitarray
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from itertools import islice
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class readAMBE:
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def __init__(self, lang,path):
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self.lang = lang
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self.path = path
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self.prefix = path+lang
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def _make_bursts(self,data):
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it = iter(data)
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for i in range(0, len(data), 108):
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yield bitarray([k for k in islice(it, 108)] )
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def readfiles(self):
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_AMBE_LENGTH = 9
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indexDict = {}
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try:
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with open(self.prefix+'.indx') as index:
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for line in index:
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(voice,start,length) = line.split()
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indexDict[voice] = [int(start) * _AMBE_LENGTH ,int(length) * _AMBE_LENGTH]
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index.close()
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except IOError:
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return False
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ambeBytearray = {}
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_wordBitarray = bitarray(endian='big')
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_wordBADict = {}
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try:
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with open(self.prefix+'.ambe','rb') as ambe:
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for _voice in indexDict:
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ambe.seek(indexDict[_voice][0])
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_wordBitarray.frombytes(ambe.read(indexDict[_voice][1]))
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#108
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_wordBADict[_voice] = []
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pairs = 1
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_lastburst = ''
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for _burst in self._make_bursts(_wordBitarray):
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#Not sure if we need to pad or not? Seems to make little difference.
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if len(_burst) < 108:
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pad = (108 - len(_burst))
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for i in range(0,pad,1):
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_burst.append(False)
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if pairs == 2:
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_wordBADict[_voice].append([_lastburst,_burst])
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_lastburst = ''
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pairs = 1
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next
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else:
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pairs = pairs + 1
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_lastburst = _burst
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_wordBitarray.clear()
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ambe.close()
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except IOError:
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return False
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_wordBADict['silence'] = ([
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[bitarray('101011000000101010100000010000000000001000000000000000000000010001000000010000000000100000000000100000000000'),
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bitarray('001010110000001010101000000100000000000010000000000000000000000100010000000100000000001000000000001000000000')]
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])
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return _wordBADict
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if __name__ == '__main__':
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test = readAMBE('en_GB','./Audio/')
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print(test.readfiles())
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