RYSEN/read_ambe.py
2020-09-19 14:05:52 +01:00

70 lines
2.5 KiB
Python

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