cpython-lru_cache-weakref: Lib/wave.py annotate

annotate Lib/wave.py @ 5817:48b94de85bf3 legacy-trunk

Extensive changes by AMK.

author	Guido van Rossum <guido@python.org>
date	Thu, 17 Jul 1997 16:29:42 +0000
parents	18451dca9469
children	86a6193049a9

rev	line source
1549 81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	1 # Stuff to parse WAVE files.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	2 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	3 # Usage.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	4 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	5 # Reading WAVE files:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	6 # f = wave.open(file, 'r')
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	7 # where file is either the name of a file or an open file pointer.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	8 # The open file pointer must have methods read(), seek(), and close().
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	9 # When the setpos() and rewind() methods are not used, the seek()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	10 # method is not necessary.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	11 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	12 # This returns an instance of a class with the following public methods:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	13 # getnchannels() -- returns number of audio channels (1 for
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	14 # mono, 2 for stereo)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	15 # getsampwidth() -- returns sample width in bytes
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	16 # getframerate() -- returns sampling frequency
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	17 # getnframes() -- returns number of audio frames
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	18 # getcomptype() -- returns compression type ('NONE' for AIFF files)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	19 # getcompname() -- returns human-readable version of
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	20 # compression type ('not compressed' for AIFF files)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	21 # getparams() -- returns a tuple consisting of all of the
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	22 # above in the above order
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	23 # getmarkers() -- returns None (for compatibility with the
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	24 # aifc module)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	25 # getmark(id) -- raises an error since the mark does not
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	26 # exist (for compatibility with the aifc module)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	27 # readframes(n) -- returns at most n frames of audio
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	28 # rewind() -- rewind to the beginning of the audio stream
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	29 # setpos(pos) -- seek to the specified position
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	30 # tell() -- return the current position
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	31 # close() -- close the instance (make it unusable)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	32 # The position returned by tell() and the position given to setpos()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	33 # are compatible and have nothing to do with the actual postion in the
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	34 # file.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	35 # The close() method is called automatically when the class instance
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	36 # is destroyed.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	37 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	38 # Writing WAVE files:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	39 # f = wave.open(file, 'w')
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	40 # where file is either the name of a file or an open file pointer.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	41 # The open file pointer must have methods write(), tell(), seek(), and
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	42 # close().
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	43 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	44 # This returns an instance of a class with the following public methods:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	45 # setnchannels(n) -- set the number of channels
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	46 # setsampwidth(n) -- set the sample width
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	47 # setframerate(n) -- set the frame rate
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	48 # setnframes(n) -- set the number of frames
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	49 # setcomptype(type, name)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	50 # -- set the compression type and the
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	51 # human-readable compression type
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	52 # setparams(nchannels, sampwidth, framerate, nframes, comptype, compname)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	53 # -- set all parameters at once
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	54 # tell() -- return current position in output file
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	55 # writeframesraw(data)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	56 # -- write audio frames without pathing up the
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	57 # file header
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	58 # writeframes(data)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	59 # -- write audio frames and patch up the file header
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	60 # close() -- patch up the file header and close the
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	61 # output file
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	62 # You should set the parameters before the first writeframesraw or
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	63 # writeframes. The total number of frames does not need to be set,
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	64 # but when it is set to the correct value, the header does not have to
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	65 # be patched up.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	66 # It is best to first set all parameters, perhaps possibly the
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	67 # compression type, and then write audio frames using writeframesraw.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	68 # When all frames have been written, either call writeframes('') or
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	69 # close() to patch up the sizes in the header.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	70 # The close() method is called automatically when the class instance
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	71 # is destroyed.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	72
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	73 import __builtin__
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	74
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	75 Error = 'wave.Error'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	76
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	77 WAVE_FORMAT_PCM = 0x0001
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	78
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	79 _array_fmts = None, 'b', 'h', None, 'l'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	80
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	81 def _read_long(file):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	82 x = 0L
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	83 for i in range(4):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	84 byte = file.read(1)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	85 if byte == '':
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	86 raise EOFError
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	87 x = x + (ord(byte) << (8 * i))
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	88 if x >= 0x80000000L:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	89 x = x - 0x100000000L
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	90 return int(x)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	91
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	92 def _read_ulong(file):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	93 x = 0L
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	94 for i in range(4):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	95 byte = file.read(1)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	96 if byte == '':
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	97 raise EOFError
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	98 x = x + (ord(byte) << (8 * i))
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	99 return x
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	100
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	101 def _read_short(file):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	102 x = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	103 for i in range(2):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	104 byte = file.read(1)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	105 if byte == '':
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	106 raise EOFError
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	107 x = x + (ord(byte) << (8 * i))
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	108 if x >= 0x8000:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	109 x = x - 0x10000
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	110 return x
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	111
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	112 def _write_short(f, x):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	113 d, m = divmod(x, 256)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	114 f.write(chr(m))
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	115 f.write(chr(d))
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	116
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	117 def _write_long(f, x):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	118 if x < 0:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	119 x = x + 0x100000000L
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	120 for i in range(4):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	121 d, m = divmod(x, 256)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	122 f.write(chr(int(m)))
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	123 x = d
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	124
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	125 class Chunk:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	126 def __init__(self, file):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	127 self.file = file
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	128 self.chunkname = self.file.read(4)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	129 if len(self.chunkname) < 4:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	130 raise EOFError
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	131 self.chunksize = _read_long(self.file)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	132 self.size_read = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	133 self.offset = self.file.tell()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	134
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	135 def rewind(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	136 self.file.seek(self.offset, 0)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	137 self.size_read = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	138
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	139 def setpos(self, pos):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	140 if pos < 0 or pos > self.chunksize:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	141 raise RuntimeError
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	142 self.file.seek(self.offset + pos, 0)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	143 self.size_read = pos
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	144
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	145 def read(self, length):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	146 if self.size_read >= self.chunksize:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	147 return ''
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	148 if length > self.chunksize - self.size_read:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	149 length = self.chunksize - self.size_read
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	150 data = self.file.read(length)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	151 self.size_read = self.size_read + len(data)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	152 return data
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	153
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	154 def skip(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	155 try:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	156 self.file.seek(self.chunksize - self.size_read, 1)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	157 except RuntimeError:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	158 while self.size_read < self.chunksize:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	159 dummy = self.read(8192)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	160 if not dummy:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	161 raise EOFError
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	162
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	163 class Wave_read:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	164 # Variables used in this class:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	165 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	166 # These variables are available to the user though appropriate
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	167 # methods of this class:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	168 # _file -- the open file with methods read(), close(), and seek()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	169 # set through the __init__() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	170 # _nchannels -- the number of audio channels
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	171 # available through the getnchannels() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	172 # _nframes -- the number of audio frames
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	173 # available through the getnframes() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	174 # _sampwidth -- the number of bytes per audio sample
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	175 # available through the getsampwidth() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	176 # _framerate -- the sampling frequency
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	177 # available through the getframerate() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	178 # _comptype -- the AIFF-C compression type ('NONE' if AIFF)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	179 # available through the getcomptype() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	180 # _compname -- the human-readable AIFF-C compression type
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	181 # available through the getcomptype() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	182 # _soundpos -- the position in the audio stream
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	183 # available through the tell() method, set through the
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	184 # setpos() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	185 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	186 # These variables are used internally only:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	187 # _fmt_chunk_read -- 1 iff the FMT chunk has been read
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	188 # _data_seek_needed -- 1 iff positioned correctly in audio
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	189 # file for readframes()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	190 # _data_chunk -- instantiation of a chunk class for the DATA chunk
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	191 # _framesize -- size of one frame in the file
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	192
4078 18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 1549 diff changeset	193 ## access _file, _nchannels, _nframes, _sampwidth, _framerate, \
18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 1549 diff changeset	194 ## _comptype, _compname, _soundpos, \
18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 1549 diff changeset	195 ## _fmt_chunk_read, _data_seek_needed, \
18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 1549 diff changeset	196 ## _data_chunk, _framesize: private
1549 81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	197
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	198 def initfp(self, file):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	199 self._file = file
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	200 self._convert = None
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	201 self._soundpos = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	202 form = self._file.read(4)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	203 if form != 'RIFF':
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	204 raise Error, 'file does not start with RIFF id'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	205 formlength = _read_long(self._file)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	206 if formlength <= 0:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	207 raise Error, 'invalid FORM chunk data size'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	208 formdata = self._file.read(4)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	209 formlength = formlength - 4
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	210 if formdata != 'WAVE':
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	211 raise Error, 'not a WAVE file'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	212 self._fmt_chunk_read = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	213 while formlength > 0:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	214 self._data_seek_needed = 1
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	215 chunk = Chunk(self._file)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	216 if chunk.chunkname == 'fmt ':
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	217 self._read_fmt_chunk(chunk)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	218 self._fmt_chunk_read = 1
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	219 elif chunk.chunkname == 'data':
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	220 if not self._fmt_chunk_read:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	221 raise Error, 'data chunk before fmt chunk'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	222 self._data_chunk = chunk
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	223 self._nframes = chunk.chunksize / self._framesize
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	224 self._data_seek_needed = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	225 formlength = formlength - 8 - chunk.chunksize
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	226 if formlength > 0:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	227 chunk.skip()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	228 if not self._fmt_chunk_read or not self._data_chunk:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	229 raise Error, 'fmt chunk and/or data chunk missing'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	230
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	231 def __init__(self, f):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	232 if type(f) == type(''):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	233 f = __builtin__.open(f, 'r')
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	234 # else, assume it is an open file object already
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	235 self.initfp(f)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	236
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	237 def __del__(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	238 if self._file:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	239 self.close()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	240
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	241 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	242 # User visible methods.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	243 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	244 def getfp(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	245 return self._file
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	246
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	247 def rewind(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	248 self._data_seek_needed = 1
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	249 self._soundpos = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	250
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	251 def close(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	252 self._file = None
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	253
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	254 def tell(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	255 return self._soundpos
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	256
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	257 def getnchannels(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	258 return self._nchannels
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	259
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	260 def getnframes(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	261 return self._nframes
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	262
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	263 def getsampwidth(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	264 return self._sampwidth
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	265
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	266 def getframerate(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	267 return self._framerate
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	268
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	269 def getcomptype(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	270 return self._comptype
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	271
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	272 def getcompname(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	273 return self._compname
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	274
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	275 def getparams(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	276 return self.getnchannels(), self.getsampwidth(), \
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	277 self.getframerate(), self.getnframes(), \
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	278 self.getcomptype(), self.getcompname()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	279
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	280 def getmarkers(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	281 return None
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	282
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	283 def getmark(self, id):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	284 raise Error, 'no marks'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	285
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	286 def setpos(self, pos):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	287 if pos < 0 or pos > self._nframes:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	288 raise Error, 'position not in range'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	289 self._soundpos = pos
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	290 self._data_seek_needed = 1
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	291
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	292 def readframes(self, nframes):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	293 if self._data_seek_needed:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	294 self._data_chunk.rewind()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	295 pos = self._soundpos * self._framesize
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	296 if pos:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	297 self._data_chunk.setpos(pos)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	298 self._data_seek_needed = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	299 if nframes == 0:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	300 return ''
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	301 if self._sampwidth > 1:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	302 # unfortunately the fromfile() method does not take
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	303 # something that only looks like a file object, so
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	304 # we have to reach into the innards of the chunk object
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	305 import array
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	306 data = array.array(_array_fmts[self._sampwidth])
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	307 nitems = nframes * self._nchannels
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	308 if nitems * self._sampwidth > self._data_chunk.chunksize - self._data_chunk.size_read:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	309 nitems = (self._data_chunk.chunksize - self._data_chunk.size_read) / self._sampwidth
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	310 data.fromfile(self._data_chunk.file, nitems)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	311 self._data_chunk.size_read = self._data_chunk.size_read + nitems * self._sampwidth
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	312 data.byteswap()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	313 data = data.tostring()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	314 else:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	315 data = self._data_chunk.read(nframes * self._framesize)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	316 if self._convert and data:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	317 data = self._convert(data)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	318 self._soundpos = self._soundpos + len(data) / (self._nchannels * self._sampwidth)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	319 return data
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	320
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	321 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	322 # Internal methods.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	323 #
4078 18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 1549 diff changeset	324 ## access *: private
1549 81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	325
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	326 def _read_fmt_chunk(self, chunk):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	327 wFormatTag = _read_short(chunk)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	328 self._nchannels = _read_short(chunk)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	329 self._framerate = _read_long(chunk)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	330 dwAvgBytesPerSec = _read_long(chunk)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	331 wBlockAlign = _read_short(chunk)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	332 if wFormatTag == WAVE_FORMAT_PCM:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	333 self._sampwidth = (_read_short(chunk) + 7) / 8
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	334 else:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	335 raise Error, 'unknown format'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	336 self._framesize = self._nchannels * self._sampwidth
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	337 self._comptype = 'NONE'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	338 self._compname = 'not compressed'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	339
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	340 class Wave_write:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	341 # Variables used in this class:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	342 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	343 # These variables are user settable through appropriate methods
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	344 # of this class:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	345 # _file -- the open file with methods write(), close(), tell(), seek()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	346 # set through the __init__() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	347 # _comptype -- the AIFF-C compression type ('NONE' in AIFF)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	348 # set through the setcomptype() or setparams() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	349 # _compname -- the human-readable AIFF-C compression type
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	350 # set through the setcomptype() or setparams() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	351 # _nchannels -- the number of audio channels
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	352 # set through the setnchannels() or setparams() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	353 # _sampwidth -- the number of bytes per audio sample
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	354 # set through the setsampwidth() or setparams() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	355 # _framerate -- the sampling frequency
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	356 # set through the setframerate() or setparams() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	357 # _nframes -- the number of audio frames written to the header
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	358 # set through the setnframes() or setparams() method
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	359 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	360 # These variables are used internally only:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	361 # _datalength -- the size of the audio samples written to the header
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	362 # _nframeswritten -- the number of frames actually written
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	363 # _datawritten -- the size of the audio samples actually written
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	364
4078 18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 1549 diff changeset	365 ## access _file, _comptype, _compname, _nchannels, _sampwidth, \
18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 1549 diff changeset	366 ## _framerate, _nframes, _nframeswritten, \
18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 1549 diff changeset	367 ## _datalength, _datawritten: private
1549 81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	368
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	369 def __init__(self, f):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	370 if type(f) == type(''):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	371 f = __builtin__.open(f, 'w')
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	372 self.initfp(f)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	373
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	374 def initfp(self, file):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	375 self._file = file
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	376 self._convert = None
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	377 self._nchannels = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	378 self._sampwidth = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	379 self._framerate = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	380 self._nframes = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	381 self._nframeswritten = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	382 self._datawritten = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	383 self._datalength = 0
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	384
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	385 def __del__(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	386 if self._file:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	387 self.close()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	388
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	389 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	390 # User visible methods.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	391 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	392 def setnchannels(self, nchannels):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	393 if self._datawritten:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	394 raise Error, 'cannot change parameters after starting to write'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	395 if nchannels < 1:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	396 raise Error, 'bad # of channels'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	397 self._nchannels = nchannels
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	398
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	399 def getnchannels(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	400 if not self._nchannels:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	401 raise Error, 'number of channels not set'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	402 return self._nchannels
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	403
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	404 def setsampwidth(self, sampwidth):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	405 if self._datawritten:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	406 raise Error, 'cannot change parameters after starting to write'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	407 if sampwidth < 1 or sampwidth > 4:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	408 raise Error, 'bad sample width'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	409 self._sampwidth = sampwidth
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	410
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	411 def getsampwidth(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	412 if not self._sampwidth:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	413 raise Error, 'sample width not set'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	414 return self._sampwidth
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	415
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	416 def setframerate(self, framerate):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	417 if self._datawritten:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	418 raise Error, 'cannot change parameters after starting to write'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	419 if framerate <= 0:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	420 raise Error, 'bad frame rate'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	421 self._framerate = framerate
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	422
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	423 def getframerate(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	424 if not self._framerate:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	425 raise Error, 'frame rate not set'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	426 return self._framerate
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	427
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	428 def setnframes(self, nframes):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	429 if self._datawritten:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	430 raise Error, 'cannot change parameters after starting to write'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	431 self._nframes = nframes
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	432
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	433 def getnframes(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	434 return self._nframeswritten
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	435
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	436 def setcomptype(self, comptype, compname):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	437 if self._datawritten:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	438 raise Error, 'cannot change parameters after starting to write'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	439 if comptype not in ('NONE',):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	440 raise Error, 'unsupported compression type'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	441 self._comptype = comptype
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	442 self._compname = compname
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	443
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	444 def getcomptype(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	445 return self._comptype
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	446
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	447 def getcompname(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	448 return self._compname
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	449
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	450 def setparams(self, (nchannels, sampwidth, framerate, nframes, comptype, compname)):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	451 if self._datawritten:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	452 raise Error, 'cannot change parameters after starting to write'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	453 self.setnchannels(nchannels)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	454 self.setsampwidth(sampwidth)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	455 self.setframerate(framerate)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	456 self.setnframes(nframes)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	457 self.setcomptype(comptype, compname)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	458
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	459 def getparams(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	460 if not self._nchannels or not self._sampwidth or not self._framerate:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	461 raise Error, 'not all parameters set'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	462 return self._nchannels, self._sampwidth, self._framerate, \
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	463 self._nframes, self._comptype, self._compname
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	464
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	465 def setmark(self, id, pos, name):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	466 raise Error, 'setmark() not supported'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	467
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	468 def getmark(self, id):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	469 raise Error, 'no marks'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	470
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	471 def getmarkers(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	472 return None
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	473
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	474 def tell(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	475 return self._nframeswritten
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	476
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	477 def writeframesraw(self, data):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	478 self._ensure_header_written(len(data))
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	479 nframes = len(data) / (self._sampwidth * self._nchannels)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	480 if self._convert:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	481 data = self._convert(data)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	482 if self._sampwidth > 1:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	483 import array
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	484 data = array.array(_array_fmts[self._sampwidth], data)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	485 data.byteswap()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	486 data.tofile(self._file)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	487 self._datawritten = self._datawritten + len(data) * self._sampwidth
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	488 else:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	489 self._file.write(data)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	490 self._datawritten = self._datawritten + len(data)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	491 self._nframeswritten = self._nframeswritten + nframes
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	492
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	493 def writeframes(self, data):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	494 self.writeframesraw(data)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	495 if self._datalength != self._datawritten:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	496 self._patchheader()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	497
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	498 def close(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	499 self._ensure_header_written(0)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	500 if self._datalength != self._datawritten:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	501 self._patchheader()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	502 self._file.flush()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	503 self._file = None
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	504
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	505 #
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	506 # Internal methods.
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	507 #
4078 18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 1549 diff changeset	508 ## access *: private
1549 81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	509
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	510 def _ensure_header_written(self, datasize):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	511 if not self._datawritten:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	512 if not self._nchannels:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	513 raise Error, '# channels not specified'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	514 if not self._sampwidth:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	515 raise Error, 'sample width not specified'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	516 if not self._framerate:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	517 raise Error, 'sampling rate not specified'
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	518 self._write_header(datasize)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	519
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	520 def _write_header(self, initlength):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	521 self._file.write('RIFF')
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	522 if not self._nframes:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	523 self._nframes = initlength / (self._nchannels * self._sampwidth)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	524 self._datalength = self._nframes * self._nchannels * self._sampwidth
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	525 self._form_length_pos = self._file.tell()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	526 _write_long(self._file, 36 + self._datalength)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	527 self._file.write('WAVE')
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	528 self._file.write('fmt ')
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	529 _write_long(self._file, 16)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	530 _write_short(self._file, WAVE_FORMAT_PCM)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	531 _write_short(self._file, self._nchannels)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	532 _write_long(self._file, self._framerate)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	533 _write_long(self._file, self._nchannels * self._framerate * self._sampwidth)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	534 _write_short(self._file, self._nchannels * self._sampwidth)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	535 _write_short(self._file, self._sampwidth * 8)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	536 self._file.write('data')
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	537 self._data_length_pos = self._file.tell()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	538 _write_long(self._file, self._datalength)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	539
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	540 def _patchheader(self):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	541 if self._datawritten == self._datalength:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	542 return
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	543 curpos = self._file.tell()
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	544 self._file.seek(self._form_length_pos, 0)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	545 _write_long(36 + self._datawritten)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	546 self._file.seek(self._data_length_pos, 0)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	547 _write_long(self._file, self._datawritten)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	548 self._file.seek(curpos, 0)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	549 self._datalength = self._datawritten
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	550
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	551 def open(f, mode):
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	552 if mode == 'r':
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	553 return Wave_read(f)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	554 elif mode == 'w':
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	555 return Wave_write(f)
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	556 else:
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	557 raise Error, "mode must be 'r' or 'w'"
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	558
81f26bf1178f aifc, sunau: make rate an int; os: restruct; ospath: obsolete; rfc822: Guido van Rossum <guido@python.org> parents: diff changeset	559 openfp = open # B/W compatibility

Mercurial > cpython-lru_cache-weakref

annotate Lib/wave.py @ 5817:48b94de85bf3 legacy-trunk