Whitespace normalization.

This commit is contained in:
Tim Peters 2001-01-15 01:36:40 +00:00
parent 0c9886d589
commit 495ad3c8cc
14 changed files with 695 additions and 695 deletions

View file

@ -43,25 +43,25 @@ When the setpos() and rewind() methods are not used, the seek()
method is not necessary.
This returns an instance of a class with the following public methods:
getnchannels() -- returns number of audio channels (1 for
mono, 2 for stereo)
getsampwidth() -- returns sample width in bytes
getframerate() -- returns sampling frequency
getnframes() -- returns number of audio frames
getcomptype() -- returns compression type ('NONE' or 'ULAW')
getcompname() -- returns human-readable version of
compression type ('not compressed' matches 'NONE')
getparams() -- returns a tuple consisting of all of the
above in the above order
getmarkers() -- returns None (for compatibility with the
aifc module)
getmark(id) -- raises an error since the mark does not
exist (for compatibility with the aifc module)
readframes(n) -- returns at most n frames of audio
rewind() -- rewind to the beginning of the audio stream
setpos(pos) -- seek to the specified position
tell() -- return the current position
close() -- close the instance (make it unusable)
getnchannels() -- returns number of audio channels (1 for
mono, 2 for stereo)
getsampwidth() -- returns sample width in bytes
getframerate() -- returns sampling frequency
getnframes() -- returns number of audio frames
getcomptype() -- returns compression type ('NONE' or 'ULAW')
getcompname() -- returns human-readable version of
compression type ('not compressed' matches 'NONE')
getparams() -- returns a tuple consisting of all of the
above in the above order
getmarkers() -- returns None (for compatibility with the
aifc module)
getmark(id) -- raises an error since the mark does not
exist (for compatibility with the aifc module)
readframes(n) -- returns at most n frames of audio
rewind() -- rewind to the beginning of the audio stream
setpos(pos) -- seek to the specified position
tell() -- return the current position
close() -- close the instance (make it unusable)
The position returned by tell() and the position given to setpos()
are compatible and have nothing to do with the actual position in the
file.
@ -75,22 +75,22 @@ The open file pointer must have methods write(), tell(), seek(), and
close().
This returns an instance of a class with the following public methods:
setnchannels(n) -- set the number of channels
setsampwidth(n) -- set the sample width
setframerate(n) -- set the frame rate
setnframes(n) -- set the number of frames
setnchannels(n) -- set the number of channels
setsampwidth(n) -- set the sample width
setframerate(n) -- set the frame rate
setnframes(n) -- set the number of frames
setcomptype(type, name)
-- set the compression type and the
human-readable compression type
-- set the compression type and the
human-readable compression type
setparams(tuple)-- set all parameters at once
tell() -- return current position in output file
tell() -- return current position in output file
writeframesraw(data)
-- write audio frames without pathing up the
file header
-- write audio frames without pathing up the
file header
writeframes(data)
-- write audio frames and patch up the file header
close() -- patch up the file header and close the
output file
-- write audio frames and patch up the file header
close() -- patch up the file header and close the
output file
You should set the parameters before the first writeframesraw or
writeframes. The total number of frames does not need to be set,
but when it is set to the correct value, the header does not have to
@ -119,356 +119,356 @@ AUDIO_FILE_ENCODING_ADPCM_G723_5 = 26
AUDIO_FILE_ENCODING_ALAW_8 = 27
# from <multimedia/audio_hdr.h>
AUDIO_UNKNOWN_SIZE = 0xFFFFFFFFL # ((unsigned)(~0))
AUDIO_UNKNOWN_SIZE = 0xFFFFFFFFL # ((unsigned)(~0))
_simple_encodings = [AUDIO_FILE_ENCODING_MULAW_8,
AUDIO_FILE_ENCODING_LINEAR_8,
AUDIO_FILE_ENCODING_LINEAR_16,
AUDIO_FILE_ENCODING_LINEAR_24,
AUDIO_FILE_ENCODING_LINEAR_32,
AUDIO_FILE_ENCODING_ALAW_8]
AUDIO_FILE_ENCODING_LINEAR_8,
AUDIO_FILE_ENCODING_LINEAR_16,
AUDIO_FILE_ENCODING_LINEAR_24,
AUDIO_FILE_ENCODING_LINEAR_32,
AUDIO_FILE_ENCODING_ALAW_8]
class Error(Exception):
pass
pass
def _read_u32(file):
x = 0L
for i in range(4):
byte = file.read(1)
if byte == '':
raise EOFError
x = x*256 + ord(byte)
return x
x = 0L
for i in range(4):
byte = file.read(1)
if byte == '':
raise EOFError
x = x*256 + ord(byte)
return x
def _write_u32(file, x):
data = []
for i in range(4):
d, m = divmod(x, 256)
data.insert(0, m)
x = d
for i in range(4):
file.write(chr(int(data[i])))
data = []
for i in range(4):
d, m = divmod(x, 256)
data.insert(0, m)
x = d
for i in range(4):
file.write(chr(int(data[i])))
class Au_read:
def __init__(self, f):
if type(f) == type(''):
import __builtin__
f = __builtin__.open(f, 'rb')
self.initfp(f)
def __init__(self, f):
if type(f) == type(''):
import __builtin__
f = __builtin__.open(f, 'rb')
self.initfp(f)
def __del__(self):
if self._file:
self.close()
def __del__(self):
if self._file:
self.close()
def initfp(self, file):
self._file = file
self._soundpos = 0
magic = int(_read_u32(file))
if magic != AUDIO_FILE_MAGIC:
raise Error, 'bad magic number'
self._hdr_size = int(_read_u32(file))
if self._hdr_size < 24:
raise Error, 'header size too small'
if self._hdr_size > 100:
raise Error, 'header size ridiculously large'
self._data_size = _read_u32(file)
if self._data_size != AUDIO_UNKNOWN_SIZE:
self._data_size = int(self._data_size)
self._encoding = int(_read_u32(file))
if self._encoding not in _simple_encodings:
raise Error, 'encoding not (yet) supported'
if self._encoding in (AUDIO_FILE_ENCODING_MULAW_8,
AUDIO_FILE_ENCODING_ALAW_8):
self._sampwidth = 2
self._framesize = 1
elif self._encoding == AUDIO_FILE_ENCODING_LINEAR_8:
self._framesize = self._sampwidth = 1
elif self._encoding == AUDIO_FILE_ENCODING_LINEAR_16:
self._framesize = self._sampwidth = 2
elif self._encoding == AUDIO_FILE_ENCODING_LINEAR_24:
self._framesize = self._sampwidth = 3
elif self._encoding == AUDIO_FILE_ENCODING_LINEAR_32:
self._framesize = self._sampwidth = 4
else:
raise Error, 'unknown encoding'
self._framerate = int(_read_u32(file))
self._nchannels = int(_read_u32(file))
self._framesize = self._framesize * self._nchannels
if self._hdr_size > 24:
self._info = file.read(self._hdr_size - 24)
for i in range(len(self._info)):
if self._info[i] == '\0':
self._info = self._info[:i]
break
else:
self._info = ''
def initfp(self, file):
self._file = file
self._soundpos = 0
magic = int(_read_u32(file))
if magic != AUDIO_FILE_MAGIC:
raise Error, 'bad magic number'
self._hdr_size = int(_read_u32(file))
if self._hdr_size < 24:
raise Error, 'header size too small'
if self._hdr_size > 100:
raise Error, 'header size ridiculously large'
self._data_size = _read_u32(file)
if self._data_size != AUDIO_UNKNOWN_SIZE:
self._data_size = int(self._data_size)
self._encoding = int(_read_u32(file))
if self._encoding not in _simple_encodings:
raise Error, 'encoding not (yet) supported'
if self._encoding in (AUDIO_FILE_ENCODING_MULAW_8,
AUDIO_FILE_ENCODING_ALAW_8):
self._sampwidth = 2
self._framesize = 1
elif self._encoding == AUDIO_FILE_ENCODING_LINEAR_8:
self._framesize = self._sampwidth = 1
elif self._encoding == AUDIO_FILE_ENCODING_LINEAR_16:
self._framesize = self._sampwidth = 2
elif self._encoding == AUDIO_FILE_ENCODING_LINEAR_24:
self._framesize = self._sampwidth = 3
elif self._encoding == AUDIO_FILE_ENCODING_LINEAR_32:
self._framesize = self._sampwidth = 4
else:
raise Error, 'unknown encoding'
self._framerate = int(_read_u32(file))
self._nchannels = int(_read_u32(file))
self._framesize = self._framesize * self._nchannels
if self._hdr_size > 24:
self._info = file.read(self._hdr_size - 24)
for i in range(len(self._info)):
if self._info[i] == '\0':
self._info = self._info[:i]
break
else:
self._info = ''
def getfp(self):
return self._file
def getfp(self):
return self._file
def getnchannels(self):
return self._nchannels
def getnchannels(self):
return self._nchannels
def getsampwidth(self):
return self._sampwidth
def getsampwidth(self):
return self._sampwidth
def getframerate(self):
return self._framerate
def getframerate(self):
return self._framerate
def getnframes(self):
if self._data_size == AUDIO_UNKNOWN_SIZE:
return AUDIO_UNKNOWN_SIZE
if self._encoding in _simple_encodings:
return self._data_size / self._framesize
return 0 # XXX--must do some arithmetic here
def getnframes(self):
if self._data_size == AUDIO_UNKNOWN_SIZE:
return AUDIO_UNKNOWN_SIZE
if self._encoding in _simple_encodings:
return self._data_size / self._framesize
return 0 # XXX--must do some arithmetic here
def getcomptype(self):
if self._encoding == AUDIO_FILE_ENCODING_MULAW_8:
return 'ULAW'
elif self._encoding == AUDIO_FILE_ENCODING_ALAW_8:
return 'ALAW'
else:
return 'NONE'
def getcomptype(self):
if self._encoding == AUDIO_FILE_ENCODING_MULAW_8:
return 'ULAW'
elif self._encoding == AUDIO_FILE_ENCODING_ALAW_8:
return 'ALAW'
else:
return 'NONE'
def getcompname(self):
if self._encoding == AUDIO_FILE_ENCODING_MULAW_8:
return 'CCITT G.711 u-law'
elif self._encoding == AUDIO_FILE_ENCODING_ALAW_8:
return 'CCITT G.711 A-law'
else:
return 'not compressed'
def getcompname(self):
if self._encoding == AUDIO_FILE_ENCODING_MULAW_8:
return 'CCITT G.711 u-law'
elif self._encoding == AUDIO_FILE_ENCODING_ALAW_8:
return 'CCITT G.711 A-law'
else:
return 'not compressed'
def getparams(self):
return self.getnchannels(), self.getsampwidth(), \
self.getframerate(), self.getnframes(), \
self.getcomptype(), self.getcompname()
def getparams(self):
return self.getnchannels(), self.getsampwidth(), \
self.getframerate(), self.getnframes(), \
self.getcomptype(), self.getcompname()
def getmarkers(self):
return None
def getmarkers(self):
return None
def getmark(self, id):
raise Error, 'no marks'
def getmark(self, id):
raise Error, 'no marks'
def readframes(self, nframes):
if self._encoding in _simple_encodings:
if nframes == AUDIO_UNKNOWN_SIZE:
data = self._file.read()
else:
data = self._file.read(nframes * self._framesize * self._nchannels)
if self._encoding == AUDIO_FILE_ENCODING_MULAW_8:
import audioop
data = audioop.ulaw2lin(data, self._sampwidth)
return data
return None # XXX--not implemented yet
def readframes(self, nframes):
if self._encoding in _simple_encodings:
if nframes == AUDIO_UNKNOWN_SIZE:
data = self._file.read()
else:
data = self._file.read(nframes * self._framesize * self._nchannels)
if self._encoding == AUDIO_FILE_ENCODING_MULAW_8:
import audioop
data = audioop.ulaw2lin(data, self._sampwidth)
return data
return None # XXX--not implemented yet
def rewind(self):
self._soundpos = 0
self._file.seek(self._hdr_size)
def rewind(self):
self._soundpos = 0
self._file.seek(self._hdr_size)
def tell(self):
return self._soundpos
def tell(self):
return self._soundpos
def setpos(self, pos):
if pos < 0 or pos > self.getnframes():
raise Error, 'position not in range'
self._file.seek(pos * self._framesize + self._hdr_size)
self._soundpos = pos
def setpos(self, pos):
if pos < 0 or pos > self.getnframes():
raise Error, 'position not in range'
self._file.seek(pos * self._framesize + self._hdr_size)
self._soundpos = pos
def close(self):
self._file = None
def close(self):
self._file = None
class Au_write:
def __init__(self, f):
if type(f) == type(''):
import __builtin__
f = __builtin__.open(f, 'wb')
self.initfp(f)
def __init__(self, f):
if type(f) == type(''):
import __builtin__
f = __builtin__.open(f, 'wb')
self.initfp(f)
def __del__(self):
if self._file:
self.close()
def __del__(self):
if self._file:
self.close()
def initfp(self, file):
self._file = file
self._framerate = 0
self._nchannels = 0
self._sampwidth = 0
self._framesize = 0
self._nframes = AUDIO_UNKNOWN_SIZE
self._nframeswritten = 0
self._datawritten = 0
self._datalength = 0
self._info = ''
self._comptype = 'ULAW' # default is U-law
def initfp(self, file):
self._file = file
self._framerate = 0
self._nchannels = 0
self._sampwidth = 0
self._framesize = 0
self._nframes = AUDIO_UNKNOWN_SIZE
self._nframeswritten = 0
self._datawritten = 0
self._datalength = 0
self._info = ''
self._comptype = 'ULAW' # default is U-law
def setnchannels(self, nchannels):
if self._nframeswritten:
raise Error, 'cannot change parameters after starting to write'
if nchannels not in (1, 2, 4):
raise Error, 'only 1, 2, or 4 channels supported'
self._nchannels = nchannels
def setnchannels(self, nchannels):
if self._nframeswritten:
raise Error, 'cannot change parameters after starting to write'
if nchannels not in (1, 2, 4):
raise Error, 'only 1, 2, or 4 channels supported'
self._nchannels = nchannels
def getnchannels(self):
if not self._nchannels:
raise Error, 'number of channels not set'
return self._nchannels
def getnchannels(self):
if not self._nchannels:
raise Error, 'number of channels not set'
return self._nchannels
def setsampwidth(self, sampwidth):
if self._nframeswritten:
raise Error, 'cannot change parameters after starting to write'
if sampwidth not in (1, 2, 4):
raise Error, 'bad sample width'
self._sampwidth = sampwidth
def setsampwidth(self, sampwidth):
if self._nframeswritten:
raise Error, 'cannot change parameters after starting to write'
if sampwidth not in (1, 2, 4):
raise Error, 'bad sample width'
self._sampwidth = sampwidth
def getsampwidth(self):
if not self._framerate:
raise Error, 'sample width not specified'
return self._sampwidth
def getsampwidth(self):
if not self._framerate:
raise Error, 'sample width not specified'
return self._sampwidth
def setframerate(self, framerate):
if self._nframeswritten:
raise Error, 'cannot change parameters after starting to write'
self._framerate = framerate
def setframerate(self, framerate):
if self._nframeswritten:
raise Error, 'cannot change parameters after starting to write'
self._framerate = framerate
def getframerate(self):
if not self._framerate:
raise Error, 'frame rate not set'
return self._framerate
def getframerate(self):
if not self._framerate:
raise Error, 'frame rate not set'
return self._framerate
def setnframes(self, nframes):
if self._nframeswritten:
raise Error, 'cannot change parameters after starting to write'
if nframes < 0:
raise Error, '# of frames cannot be negative'
self._nframes = nframes
def setnframes(self, nframes):
if self._nframeswritten:
raise Error, 'cannot change parameters after starting to write'
if nframes < 0:
raise Error, '# of frames cannot be negative'
self._nframes = nframes
def getnframes(self):
return self._nframeswritten
def getnframes(self):
return self._nframeswritten
def setcomptype(self, type, name):
if type in ('NONE', 'ULAW'):
self._comptype = type
else:
raise Error, 'unknown compression type'
def setcomptype(self, type, name):
if type in ('NONE', 'ULAW'):
self._comptype = type
else:
raise Error, 'unknown compression type'
def getcomptype(self):
return self._comptype
def getcomptype(self):
return self._comptype
def getcompname(self):
if self._comptype == 'ULAW':
return 'CCITT G.711 u-law'
elif self._comptype == 'ALAW':
return 'CCITT G.711 A-law'
else:
return 'not compressed'
def getcompname(self):
if self._comptype == 'ULAW':
return 'CCITT G.711 u-law'
elif self._comptype == 'ALAW':
return 'CCITT G.711 A-law'
else:
return 'not compressed'
def setparams(self, (nchannels, sampwidth, framerate, nframes, comptype, compname)):
self.setnchannels(nchannels)
self.setsampwidth(sampwidth)
self.setframerate(framerate)
self.setnframes(nframes)
self.setcomptype(comptype, compname)
def setparams(self, (nchannels, sampwidth, framerate, nframes, comptype, compname)):
self.setnchannels(nchannels)
self.setsampwidth(sampwidth)
self.setframerate(framerate)
self.setnframes(nframes)
self.setcomptype(comptype, compname)
def getparams(self):
return self.getnchannels(), self.getsampwidth(), \
self.getframerate(), self.getnframes(), \
self.getcomptype(), self.getcompname()
def getparams(self):
return self.getnchannels(), self.getsampwidth(), \
self.getframerate(), self.getnframes(), \
self.getcomptype(), self.getcompname()
def tell(self):
return self._nframeswritten
def tell(self):
return self._nframeswritten
def writeframesraw(self, data):
self._ensure_header_written()
nframes = len(data) / self._framesize
if self._comptype == 'ULAW':
import audioop
data = audioop.lin2ulaw(data, self._sampwidth)
self._file.write(data)
self._nframeswritten = self._nframeswritten + nframes
self._datawritten = self._datawritten + len(data)
def writeframesraw(self, data):
self._ensure_header_written()
nframes = len(data) / self._framesize
if self._comptype == 'ULAW':
import audioop
data = audioop.lin2ulaw(data, self._sampwidth)
self._file.write(data)
self._nframeswritten = self._nframeswritten + nframes
self._datawritten = self._datawritten + len(data)
def writeframes(self, data):
self.writeframesraw(data)
if self._nframeswritten != self._nframes or \
self._datalength != self._datawritten:
self._patchheader()
def writeframes(self, data):
self.writeframesraw(data)
if self._nframeswritten != self._nframes or \
self._datalength != self._datawritten:
self._patchheader()
def close(self):
self._ensure_header_written()
if self._nframeswritten != self._nframes or \
self._datalength != self._datawritten:
self._patchheader()
self._file.flush()
self._file = None
def close(self):
self._ensure_header_written()
if self._nframeswritten != self._nframes or \
self._datalength != self._datawritten:
self._patchheader()
self._file.flush()
self._file = None
#
# private methods
#
#
# private methods
#
def _ensure_header_written(self):
if not self._nframeswritten:
if not self._nchannels:
raise Error, '# of channels not specified'
if not self._sampwidth:
raise Error, 'sample width not specified'
if not self._framerate:
raise Error, 'frame rate not specified'
self._write_header()
def _ensure_header_written(self):
if not self._nframeswritten:
if not self._nchannels:
raise Error, '# of channels not specified'
if not self._sampwidth:
raise Error, 'sample width not specified'
if not self._framerate:
raise Error, 'frame rate not specified'
self._write_header()
def _write_header(self):
if self._comptype == 'NONE':
if self._sampwidth == 1:
encoding = AUDIO_FILE_ENCODING_LINEAR_8
self._framesize = 1
elif self._sampwidth == 2:
encoding = AUDIO_FILE_ENCODING_LINEAR_16
self._framesize = 2
elif self._sampwidth == 4:
encoding = AUDIO_FILE_ENCODING_LINEAR_32
self._framesize = 4
else:
raise Error, 'internal error'
elif self._comptype == 'ULAW':
encoding = AUDIO_FILE_ENCODING_MULAW_8
self._framesize = 1
else:
raise Error, 'internal error'
self._framesize = self._framesize * self._nchannels
_write_u32(self._file, AUDIO_FILE_MAGIC)
header_size = 25 + len(self._info)
header_size = (header_size + 7) & ~7
_write_u32(self._file, header_size)
if self._nframes == AUDIO_UNKNOWN_SIZE:
length = AUDIO_UNKNOWN_SIZE
else:
length = self._nframes * self._framesize
_write_u32(self._file, length)
self._datalength = length
_write_u32(self._file, encoding)
_write_u32(self._file, self._framerate)
_write_u32(self._file, self._nchannels)
self._file.write(self._info)
self._file.write('\0'*(header_size - len(self._info) - 24))
def _write_header(self):
if self._comptype == 'NONE':
if self._sampwidth == 1:
encoding = AUDIO_FILE_ENCODING_LINEAR_8
self._framesize = 1
elif self._sampwidth == 2:
encoding = AUDIO_FILE_ENCODING_LINEAR_16
self._framesize = 2
elif self._sampwidth == 4:
encoding = AUDIO_FILE_ENCODING_LINEAR_32
self._framesize = 4
else:
raise Error, 'internal error'
elif self._comptype == 'ULAW':
encoding = AUDIO_FILE_ENCODING_MULAW_8
self._framesize = 1
else:
raise Error, 'internal error'
self._framesize = self._framesize * self._nchannels
_write_u32(self._file, AUDIO_FILE_MAGIC)
header_size = 25 + len(self._info)
header_size = (header_size + 7) & ~7
_write_u32(self._file, header_size)
if self._nframes == AUDIO_UNKNOWN_SIZE:
length = AUDIO_UNKNOWN_SIZE
else:
length = self._nframes * self._framesize
_write_u32(self._file, length)
self._datalength = length
_write_u32(self._file, encoding)
_write_u32(self._file, self._framerate)
_write_u32(self._file, self._nchannels)
self._file.write(self._info)
self._file.write('\0'*(header_size - len(self._info) - 24))
def _patchheader(self):
self._file.seek(8)
_write_u32(self._file, self._datawritten)
self._datalength = self._datawritten
self._file.seek(0, 2)
def _patchheader(self):
self._file.seek(8)
_write_u32(self._file, self._datawritten)
self._datalength = self._datawritten
self._file.seek(0, 2)
def open(f, mode=None):
if mode is None:
if hasattr(f, 'mode'):
mode = f.mode
else:
mode = 'rb'
if mode in ('r', 'rb'):
return Au_read(f)
elif mode in ('w', 'wb'):
return Au_write(f)
else:
raise Error, "mode must be 'r', 'rb', 'w', or 'wb'"
if mode is None:
if hasattr(f, 'mode'):
mode = f.mode
else:
mode = 'rb'
if mode in ('r', 'rb'):
return Au_read(f)
elif mode in ('w', 'wb'):
return Au_write(f)
else:
raise Error, "mode must be 'r', 'rb', 'w', or 'wb'"
openfp = open