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

annotate Lib/aifc.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	536935c29401
children	8b49c918a25f

rev	line source
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	1 # Stuff to parse AIFF-C and AIFF files.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	2 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	3 # Unless explicitly stated otherwise, the description below is true
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	4 # both for AIFF-C files and AIFF files.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	5 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	6 # An AIFF-C file has the following structure.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	7 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	8 # +-----------------+
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	9 # \| FORM \|
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	10 # +-----------------+
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	11 # \| <size> \|
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	12 # +----+------------+
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	13 # \| \| AIFC \|
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	14 # \| +------------+
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	15 # \| \| <chunks> \|
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	16 # \| \| . \|
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	17 # \| \| . \|
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	18 # \| \| . \|
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	19 # +----+------------+
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	20 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	21 # An AIFF file has the string "AIFF" instead of "AIFC".
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	22 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	23 # A chunk consists of an identifier (4 bytes) followed by a size (4 bytes,
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	24 # big endian order), followed by the data. The size field does not include
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	25 # the size of the 8 byte header.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	26 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	27 # The following chunk types are recognized.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	28 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	29 # FVER
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	30 # <version number of AIFF-C defining document> (AIFF-C only).
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	31 # MARK
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	32 # <# of markers> (2 bytes)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	33 # list of markers:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	34 # <marker ID> (2 bytes, must be > 0)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	35 # <position> (4 bytes)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	36 # <marker name> ("pstring")
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	37 # COMM
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	38 # <# of channels> (2 bytes)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	39 # <# of sound frames> (4 bytes)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	40 # <size of the samples> (2 bytes)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	41 # <sampling frequency> (10 bytes, IEEE 80-bit extended
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	42 # floating point)
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	43 # in AIFF-C files only:
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	44 # <compression type> (4 bytes)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	45 # <human-readable version of compression type> ("pstring")
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	46 # SSND
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	47 # <offset> (4 bytes, not used by this program)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	48 # <blocksize> (4 bytes, not used by this program)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	49 # <sound data>
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	50 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	51 # A pstring consists of 1 byte length, a string of characters, and 0 or 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	52 # byte pad to make the total length even.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	53 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	54 # Usage.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	55 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	56 # Reading AIFF files:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	57 # f = aifc.open(file, 'r')
1437 e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements. Sjoerd Mullender <sjoerd@acm.org> parents: 1436 diff changeset	58 # where file is either the name of a file or an open file pointer.
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	59 # The open file pointer must have methods read(), seek(), and close().
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	60 # In some types of audio files, if the setpos() method is not used,
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	61 # the seek() method is not necessary.
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	62 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	63 # This returns an instance of a class with the following public methods:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	64 # getnchannels() -- returns number of audio channels (1 for
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	65 # mono, 2 for stereo)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	66 # getsampwidth() -- returns sample width in bytes
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	67 # getframerate() -- returns sampling frequency
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	68 # getnframes() -- returns number of audio frames
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	69 # getcomptype() -- returns compression type ('NONE' for AIFF files)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	70 # getcompname() -- returns human-readable version of
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	71 # compression type ('not compressed' for AIFF files)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	72 # getparams() -- returns a tuple consisting of all of the
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	73 # above in the above order
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	74 # getmarkers() -- get the list of marks in the audio file or None
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	75 # if there are no marks
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	76 # getmark(id) -- get mark with the specified id (raises an error
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	77 # if the mark does not exist)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	78 # readframes(n) -- returns at most n frames of audio
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	79 # rewind() -- rewind to the beginning of the audio stream
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	80 # setpos(pos) -- seek to the specified position
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	81 # tell() -- return the current position
1297 9234c961ec43 * toaiff.py: import whatsound instead of sndhdr Guido van Rossum <guido@python.org> parents: 1291 diff changeset	82 # close() -- close the instance (make it unusable)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	83 # The position returned by tell(), the position given to setpos() and
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	84 # the position of marks are all compatible and have nothing to do with
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	85 # the actual postion in the file.
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	86 # The close() method is called automatically when the class instance
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	87 # is destroyed.
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	88 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	89 # Writing AIFF files:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	90 # f = aifc.open(file, 'w')
1437 e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements. Sjoerd Mullender <sjoerd@acm.org> parents: 1436 diff changeset	91 # where file is either the name of a file or an open file pointer.
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	92 # The open file pointer must have methods write(), tell(), seek(), and
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	93 # close().
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	94 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	95 # This returns an instance of a class with the following public methods:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	96 # aiff() -- create an AIFF file (AIFF-C default)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	97 # aifc() -- create an AIFF-C file
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	98 # setnchannels(n) -- set the number of channels
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	99 # setsampwidth(n) -- set the sample width
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	100 # setframerate(n) -- set the frame rate
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	101 # setnframes(n) -- set the number of frames
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	102 # setcomptype(type, name)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	103 # -- set the compression type and the
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	104 # human-readable compression type
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	105 # setparams(nchannels, sampwidth, framerate, nframes, comptype, compname)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	106 # -- set all parameters at once
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	107 # setmark(id, pos, name)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	108 # -- add specified mark to the list of marks
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	109 # tell() -- return current position in output file (useful
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	110 # in combination with setmark())
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	111 # writeframesraw(data)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	112 # -- write audio frames without pathing up the
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	113 # file header
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	114 # writeframes(data)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	115 # -- write audio frames and patch up the file header
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	116 # close() -- patch up the file header and close the
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	117 # output file
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	118 # You should set the parameters before the first writeframesraw or
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	119 # writeframes. The total number of frames does not need to be set,
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	120 # but when it is set to the correct value, the header does not have to
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	121 # be patched up.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	122 # It is best to first set all parameters, perhaps possibly the
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	123 # compression type, and then write audio frames using writeframesraw.
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	124 # When all frames have been written, either call writeframes('') or
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	125 # close() to patch up the sizes in the header.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	126 # Marks can be added anytime. If there are any marks, ypu must call
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	127 # close() after all frames have been written.
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	128 # The close() method is called automatically when the class instance
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	129 # is destroyed.
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	130 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	131 # When a file is opened with the extension '.aiff', an AIFF file is
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	132 # written, otherwise an AIFF-C file is written. This default can be
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	133 # changed by calling aiff() or aifc() before the first writeframes or
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	134 # writeframesraw.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	135
4845 0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	136 import struct
1540 4047f224efdb Use __builtin__ instead of builtin Guido van Rossum <guido@python.org> parents: 1539 diff changeset	137 import __builtin__
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	138 try:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	139 import CL
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	140 except ImportError:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	141 pass
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	142
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	143 Error = 'aifc.Error'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	144
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	145 _AIFC_version = 0xA2805140 # Version 1 of AIFF-C
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	146
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	147 _skiplist = 'COMT', 'INST', 'MIDI', 'AESD', \
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	148 'APPL', 'NAME', 'AUTH', '(c) ', 'ANNO'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	149
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	150 def _read_long(file):
4845 0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	151 try:
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	152 return struct.unpack('>l', file.read(4))[0]
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	153 except struct.error:
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	154 raise EOFError
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	155
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	156 def _read_ulong(file):
4845 0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	157 try:
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	158 return struct.unpack('>L', file.read(4))[0]
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	159 except struct.error:
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	160 raise EOFError
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	161
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	162 def _read_short(file):
4845 0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	163 try:
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	164 return struct.unpack('>h', file.read(2))[0]
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	165 except struct.error:
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	166 raise EOFError
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	167
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	168 def _read_string(file):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	169 length = ord(file.read(1))
1746 1940892d2fe3 Merge alpha100 branch back to main trunk Guido van Rossum <guido@python.org> parents: 1540 diff changeset	170 if length == 0:
1940892d2fe3 Merge alpha100 branch back to main trunk Guido van Rossum <guido@python.org> parents: 1540 diff changeset	171 data = ''
1940892d2fe3 Merge alpha100 branch back to main trunk Guido van Rossum <guido@python.org> parents: 1540 diff changeset	172 else:
1940892d2fe3 Merge alpha100 branch back to main trunk Guido van Rossum <guido@python.org> parents: 1540 diff changeset	173 data = file.read(length)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	174 if length & 1 == 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	175 dummy = file.read(1)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	176 return data
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	177
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	178 _HUGE_VAL = 1.79769313486231e+308 # See <limits.h>
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	179
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	180 def _read_float(f): # 10 bytes
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	181 import math
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	182 expon = _read_short(f) # 2 bytes
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	183 sign = 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	184 if expon < 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	185 sign = -1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	186 expon = expon + 0x8000
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	187 himant = _read_ulong(f) # 4 bytes
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	188 lomant = _read_ulong(f) # 4 bytes
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	189 if expon == himant == lomant == 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	190 f = 0.0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	191 elif expon == 0x7FFF:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	192 f = _HUGE_VAL
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	193 else:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	194 expon = expon - 16383
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	195 f = (himant * 0x100000000L + lomant) * pow(2.0, expon - 63)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	196 return sign * f
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	197
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	198 def _write_short(f, x):
4845 0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	199 f.write(struct.pack('>h', x))
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	200
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	201 def _write_long(f, x):
4930 536935c29401 Use newer struct, which handles unsigned long right Guido van Rossum <guido@python.org> parents: 4845 diff changeset	202 f.write(struct.pack('>L', x))
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	203
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	204 def _write_string(f, s):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	205 f.write(chr(len(s)))
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	206 f.write(s)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	207 if len(s) & 1 == 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	208 f.write(chr(0))
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	209
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	210 def _write_float(f, x):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	211 import math
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	212 if x < 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	213 sign = 0x8000
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	214 x = x * -1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	215 else:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	216 sign = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	217 if x == 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	218 expon = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	219 himant = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	220 lomant = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	221 else:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	222 fmant, expon = math.frexp(x)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	223 if expon > 16384 or fmant >= 1: # Infinity or NaN
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	224 expon = sign\|0x7FFF
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	225 himant = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	226 lomant = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	227 else: # Finite
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	228 expon = expon + 16382
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	229 if expon < 0: # denormalized
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	230 fmant = math.ldexp(fmant, expon)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	231 expon = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	232 expon = expon \| sign
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	233 fmant = math.ldexp(fmant, 32)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	234 fsmant = math.floor(fmant)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	235 himant = long(fsmant)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	236 fmant = math.ldexp(fmant - fsmant, 32)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	237 fsmant = math.floor(fmant)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	238 lomant = long(fsmant)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	239 _write_short(f, expon)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	240 _write_long(f, himant)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	241 _write_long(f, lomant)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	242
1291 517d29ebc840 * ftplib.py: added abort() command (sends oob data). Guido van Rossum <guido@python.org> parents: 1208 diff changeset	243 class Chunk:
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	244 def __init__(self, file):
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	245 self.file = file
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	246 self.chunkname = self.file.read(4)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	247 if len(self.chunkname) < 4:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	248 raise EOFError
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	249 self.chunksize = _read_long(self.file)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	250 self.size_read = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	251 self.offset = self.file.tell()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	252
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	253 def rewind(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	254 self.file.seek(self.offset, 0)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	255 self.size_read = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	256
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	257 def setpos(self, pos):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	258 if pos < 0 or pos > self.chunksize:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	259 raise RuntimeError
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	260 self.file.seek(self.offset + pos, 0)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	261 self.size_read = pos
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	262
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	263 def read(self, length):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	264 if self.size_read >= self.chunksize:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	265 return ''
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	266 if length > self.chunksize - self.size_read:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	267 length = self.chunksize - self.size_read
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	268 data = self.file.read(length)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	269 self.size_read = self.size_read + len(data)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	270 return data
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	271
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	272 def skip(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	273 try:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	274 self.file.seek(self.chunksize - self.size_read, 1)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	275 except RuntimeError:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	276 while self.size_read < self.chunksize:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	277 dummy = self.read(8192)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	278 if not dummy:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	279 raise EOFError
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	280 if self.chunksize & 1:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	281 dummy = self.read(1)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	282
1291 517d29ebc840 * ftplib.py: added abort() command (sends oob data). Guido van Rossum <guido@python.org> parents: 1208 diff changeset	283 class Aifc_read:
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	284 # Variables used in this class:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	285 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	286 # These variables are available to the user though appropriate
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	287 # methods of this class:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	288 # _file -- the open file with methods read(), close(), and seek()
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	289 # set through the __init__() method
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	290 # _nchannels -- the number of audio channels
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	291 # available through the getnchannels() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	292 # _nframes -- the number of audio frames
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	293 # available through the getnframes() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	294 # _sampwidth -- the number of bytes per audio sample
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	295 # available through the getsampwidth() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	296 # _framerate -- the sampling frequency
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	297 # available through the getframerate() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	298 # _comptype -- the AIFF-C compression type ('NONE' if AIFF)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	299 # available through the getcomptype() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	300 # _compname -- the human-readable AIFF-C compression type
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	301 # available through the getcomptype() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	302 # _markers -- the marks in the audio file
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	303 # available through the getmarkers() and getmark()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	304 # methods
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	305 # _soundpos -- the position in the audio stream
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	306 # available through the tell() method, set through the
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	307 # setpos() method
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	308 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	309 # These variables are used internally only:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	310 # _version -- the AIFF-C version number
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	311 # _decomp -- the decompressor from builtin module cl
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	312 # _comm_chunk_read -- 1 iff the COMM chunk has been read
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	313 # _aifc -- 1 iff reading an AIFF-C file
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	314 # _ssnd_seek_needed -- 1 iff positioned correctly in audio
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	315 # file for readframes()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	316 # _ssnd_chunk -- instantiation of a chunk class for the SSND chunk
1205 ecfbc246eeaa CL.py, clmodule.c: Adapted to new CL library. Lots of new methods. Sjoerd Mullender <sjoerd@acm.org> parents: 1204 diff changeset	317 # _framesize -- size of one frame in the file
1437 e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements. Sjoerd Mullender <sjoerd@acm.org> parents: 1436 diff changeset	318
4078 18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 2948 diff changeset	319 ## if 0: access _file, _nchannels, _nframes, _sampwidth, _framerate, \
18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 2948 diff changeset	320 ## _comptype, _compname, _markers, _soundpos, _version, \
18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 2948 diff changeset	321 ## _decomp, _comm_chunk_read, __aifc, _ssnd_seek_needed, \
18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 2948 diff changeset	322 ## _ssnd_chunk, _framesize: private
1437 e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements. Sjoerd Mullender <sjoerd@acm.org> parents: 1436 diff changeset	323
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	324 def initfp(self, file):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	325 self._file = file
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	326 self._version = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	327 self._decomp = None
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	328 self._convert = None
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	329 self._markers = []
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	330 self._soundpos = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	331 form = self._file.read(4)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	332 if form != 'FORM':
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	333 raise Error, 'file does not start with FORM id'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	334 formlength = _read_long(self._file)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	335 if formlength <= 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	336 raise Error, 'invalid FORM chunk data size'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	337 formdata = self._file.read(4)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	338 formlength = formlength - 4
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	339 if formdata == 'AIFF':
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	340 self._aifc = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	341 elif formdata == 'AIFC':
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	342 self._aifc = 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	343 else:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	344 raise Error, 'not an AIFF or AIFF-C file'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	345 self._comm_chunk_read = 0
1193 b7aee799dc71 Found and fixed a few bugs in the handling of audio files with MARKs. Sjoerd Mullender <sjoerd@acm.org> parents: 1192 diff changeset	346 while formlength > 0:
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	347 self._ssnd_seek_needed = 1
1204 3573ef421bf4 added kludge for buggy soundfiler from SGI; when reading 0 frames, Sjoerd Mullender <sjoerd@acm.org> parents: 1196 diff changeset	348 #DEBUG: SGI's soundfiler has a bug. There should
3573ef421bf4 added kludge for buggy soundfiler from SGI; when reading 0 frames, Sjoerd Mullender <sjoerd@acm.org> parents: 1196 diff changeset	349 # be no need to check for EOF here.
3573ef421bf4 added kludge for buggy soundfiler from SGI; when reading 0 frames, Sjoerd Mullender <sjoerd@acm.org> parents: 1196 diff changeset	350 try:
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	351 chunk = Chunk(self._file)
1204 3573ef421bf4 added kludge for buggy soundfiler from SGI; when reading 0 frames, Sjoerd Mullender <sjoerd@acm.org> parents: 1196 diff changeset	352 except EOFError:
3573ef421bf4 added kludge for buggy soundfiler from SGI; when reading 0 frames, Sjoerd Mullender <sjoerd@acm.org> parents: 1196 diff changeset	353 if formlength == 8:
3573ef421bf4 added kludge for buggy soundfiler from SGI; when reading 0 frames, Sjoerd Mullender <sjoerd@acm.org> parents: 1196 diff changeset	354 print 'Warning: FORM chunk size too large'
3573ef421bf4 added kludge for buggy soundfiler from SGI; when reading 0 frames, Sjoerd Mullender <sjoerd@acm.org> parents: 1196 diff changeset	355 formlength = 0
3573ef421bf4 added kludge for buggy soundfiler from SGI; when reading 0 frames, Sjoerd Mullender <sjoerd@acm.org> parents: 1196 diff changeset	356 break
3573ef421bf4 added kludge for buggy soundfiler from SGI; when reading 0 frames, Sjoerd Mullender <sjoerd@acm.org> parents: 1196 diff changeset	357 raise EOFError # different error, raise exception
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	358 if chunk.chunkname == 'COMM':
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	359 self._read_comm_chunk(chunk)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	360 self._comm_chunk_read = 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	361 elif chunk.chunkname == 'SSND':
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	362 self._ssnd_chunk = chunk
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	363 dummy = chunk.read(8)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	364 self._ssnd_seek_needed = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	365 elif chunk.chunkname == 'FVER':
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	366 self._version = _read_long(chunk)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	367 elif chunk.chunkname == 'MARK':
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	368 self._readmark(chunk)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	369 elif chunk.chunkname in _skiplist:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	370 pass
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	371 else:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	372 raise Error, 'unrecognized chunk type '+chunk.chunkname
1336 c44545e595a1 Fixed dealing with faulty COMM chunks. Sjoerd Mullender <sjoerd@acm.org> parents: 1315 diff changeset	373 formlength = formlength - 8 - chunk.chunksize
c44545e595a1 Fixed dealing with faulty COMM chunks. Sjoerd Mullender <sjoerd@acm.org> parents: 1315 diff changeset	374 if chunk.chunksize & 1:
c44545e595a1 Fixed dealing with faulty COMM chunks. Sjoerd Mullender <sjoerd@acm.org> parents: 1315 diff changeset	375 formlength = formlength - 1
1196 ce67d91adf5e Fixed a bug where the library inadvertently skipped over the sound Sjoerd Mullender <sjoerd@acm.org> parents: 1193 diff changeset	376 if formlength > 0:
ce67d91adf5e Fixed a bug where the library inadvertently skipped over the sound Sjoerd Mullender <sjoerd@acm.org> parents: 1193 diff changeset	377 chunk.skip()
1193 b7aee799dc71 Found and fixed a few bugs in the handling of audio files with MARKs. Sjoerd Mullender <sjoerd@acm.org> parents: 1192 diff changeset	378 if not self._comm_chunk_read or not self._ssnd_chunk:
b7aee799dc71 Found and fixed a few bugs in the handling of audio files with MARKs. Sjoerd Mullender <sjoerd@acm.org> parents: 1192 diff changeset	379 raise Error, 'COMM chunk and/or SSND chunk missing'
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	380 if self._aifc and self._decomp:
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	381 params = [CL.ORIGINAL_FORMAT, 0,
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	382 CL.BITS_PER_COMPONENT, self._sampwidth * 8,
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	383 CL.FRAME_RATE, self._framerate]
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	384 if self._nchannels == 1:
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	385 params[1] = CL.MONO
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	386 elif self._nchannels == 2:
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	387 params[1] = CL.STEREO_INTERLEAVED
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	388 else:
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	389 raise Error, 'cannot compress more than 2 channels'
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	390 self._decomp.SetParams(params)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	391
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	392 def __init__(self, f):
560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	393 if type(f) == type(''):
1893 aba51621244e audiodev.py: Mac port. Guido van Rossum <guido@python.org> parents: 1864 diff changeset	394 f = __builtin__.open(f, 'rb')
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	395 # else, assume it is an open file object already
560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	396 self.initfp(f)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	397
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	398 def __del__(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	399 if self._file:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	400 self.close()
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	401
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	402 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	403 # User visible methods.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	404 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	405 def getfp(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	406 return self._file
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	407
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	408 def rewind(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	409 self._ssnd_seek_needed = 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	410 self._soundpos = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	411
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	412 def close(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	413 if self._decomp:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	414 self._decomp.CloseDecompressor()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	415 self._decomp = None
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	416 self._file = None
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	417
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	418 def tell(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	419 return self._soundpos
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	420
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	421 def getnchannels(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	422 return self._nchannels
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	423
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	424 def getnframes(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	425 return self._nframes
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	426
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	427 def getsampwidth(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	428 return self._sampwidth
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	429
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	430 def getframerate(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	431 return self._framerate
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	432
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	433 def getcomptype(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	434 return self._comptype
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	435
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	436 def getcompname(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	437 return self._compname
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	438
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	439 ## def getversion(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	440 ## return self._version
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	441
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	442 def getparams(self):
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	443 return self.getnchannels(), self.getsampwidth(), \
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	444 self.getframerate(), self.getnframes(), \
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	445 self.getcomptype(), self.getcompname()
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	446
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	447 def getmarkers(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	448 if len(self._markers) == 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	449 return None
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	450 return self._markers
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	451
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	452 def getmark(self, id):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	453 for marker in self._markers:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	454 if id == marker[0]:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	455 return marker
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	456 raise Error, 'marker ' + `id` + ' does not exist'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	457
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	458 def setpos(self, pos):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	459 if pos < 0 or pos > self._nframes:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	460 raise Error, 'position not in range'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	461 self._soundpos = pos
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	462 self._ssnd_seek_needed = 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	463
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	464 def readframes(self, nframes):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	465 if self._ssnd_seek_needed:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	466 self._ssnd_chunk.rewind()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	467 dummy = self._ssnd_chunk.read(8)
1205 ecfbc246eeaa CL.py, clmodule.c: Adapted to new CL library. Lots of new methods. Sjoerd Mullender <sjoerd@acm.org> parents: 1204 diff changeset	468 pos = self._soundpos * self._framesize
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	469 if pos:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	470 self._ssnd_chunk.setpos(pos + 8)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	471 self._ssnd_seek_needed = 0
1204 3573ef421bf4 added kludge for buggy soundfiler from SGI; when reading 0 frames, Sjoerd Mullender <sjoerd@acm.org> parents: 1196 diff changeset	472 if nframes == 0:
3573ef421bf4 added kludge for buggy soundfiler from SGI; when reading 0 frames, Sjoerd Mullender <sjoerd@acm.org> parents: 1196 diff changeset	473 return ''
1205 ecfbc246eeaa CL.py, clmodule.c: Adapted to new CL library. Lots of new methods. Sjoerd Mullender <sjoerd@acm.org> parents: 1204 diff changeset	474 data = self._ssnd_chunk.read(nframes * self._framesize)
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	475 if self._convert and data:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	476 data = self._convert(data)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	477 self._soundpos = self._soundpos + len(data) / (self._nchannels * self._sampwidth)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	478 return data
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	479
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	480 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	481 # Internal methods.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	482 #
4078 18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 2948 diff changeset	483 ## if 0: access *: private
1437 e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements. Sjoerd Mullender <sjoerd@acm.org> parents: 1436 diff changeset	484
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	485 def _decomp_data(self, data):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	486 dummy = self._decomp.SetParam(CL.FRAME_BUFFER_SIZE,
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	487 len(data) * 2)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	488 return self._decomp.Decompress(len(data) / self._nchannels,
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	489 data)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	490
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	491 def _ulaw2lin(self, data):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	492 import audioop
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	493 return audioop.ulaw2lin(data, 2)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	494
1864 aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	495 def _adpcm2lin(self, data):
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	496 import audioop
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	497 if not hasattr(self, '_adpcmstate'):
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	498 # first time
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	499 self._adpcmstate = None
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	500 data, self._adpcmstate = audioop.adpcm2lin(data, 2,
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	501 self._adpcmstate)
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	502 return data
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	503
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	504 def _read_comm_chunk(self, chunk):
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	505 self._nchannels = _read_short(chunk)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	506 self._nframes = _read_long(chunk)
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	507 self._sampwidth = (_read_short(chunk) + 7) / 8
1539 5a17c43dcff0 aifc.py: framerate should be an int. Sjoerd Mullender <sjoerd@acm.org> parents: 1499 diff changeset	508 self._framerate = int(_read_float(chunk))
1205 ecfbc246eeaa CL.py, clmodule.c: Adapted to new CL library. Lots of new methods. Sjoerd Mullender <sjoerd@acm.org> parents: 1204 diff changeset	509 self._framesize = self._nchannels * self._sampwidth
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	510 if self._aifc:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	511 #DEBUG: SGI's soundeditor produces a bad size :-(
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	512 kludge = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	513 if chunk.chunksize == 18:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	514 kludge = 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	515 print 'Warning: bad COMM chunk size'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	516 chunk.chunksize = 23
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	517 #DEBUG end
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	518 self._comptype = chunk.read(4)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	519 #DEBUG start
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	520 if kludge:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	521 length = ord(chunk.file.read(1))
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	522 if length & 1 == 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	523 length = length + 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	524 chunk.chunksize = chunk.chunksize + length
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	525 chunk.file.seek(-1, 1)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	526 #DEBUG end
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	527 self._compname = _read_string(chunk)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	528 if self._comptype != 'NONE':
1864 aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	529 if self._comptype == 'G722':
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	530 try:
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	531 import audioop
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	532 except ImportError:
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	533 pass
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	534 else:
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	535 self._convert = self._adpcm2lin
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	536 self._framesize = self._framesize / 4
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	537 return
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	538 # for ULAW and ALAW try Compression Library
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	539 try:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	540 import cl, CL
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	541 except ImportError:
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	542 if self._comptype == 'ULAW':
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	543 try:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	544 import audioop
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	545 self._convert = self._ulaw2lin
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	546 self._framesize = self._framesize / 2
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	547 return
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	548 except ImportError:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	549 pass
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	550 raise Error, 'cannot read compressed AIFF-C files'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	551 if self._comptype == 'ULAW':
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	552 scheme = CL.G711_ULAW
1205 ecfbc246eeaa CL.py, clmodule.c: Adapted to new CL library. Lots of new methods. Sjoerd Mullender <sjoerd@acm.org> parents: 1204 diff changeset	553 self._framesize = self._framesize / 2
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	554 elif self._comptype == 'ALAW':
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	555 scheme = CL.G711_ALAW
1205 ecfbc246eeaa CL.py, clmodule.c: Adapted to new CL library. Lots of new methods. Sjoerd Mullender <sjoerd@acm.org> parents: 1204 diff changeset	556 self._framesize = self._framesize / 2
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	557 else:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	558 raise Error, 'unsupported compression type'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	559 self._decomp = cl.OpenDecompressor(scheme)
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	560 self._convert = self._decomp_data
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	561 else:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	562 self._comptype = 'NONE'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	563 self._compname = 'not compressed'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	564
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	565 def _readmark(self, chunk):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	566 nmarkers = _read_short(chunk)
1315 acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	567 # Some files appear to contain invalid counts.
acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	568 # Cope with this by testing for EOF.
acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	569 try:
acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	570 for i in range(nmarkers):
acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	571 id = _read_short(chunk)
acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	572 pos = _read_long(chunk)
acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	573 name = _read_string(chunk)
1923 c1088d0bb562 Ignore empty markers. Sjoerd Mullender <sjoerd@acm.org> parents: 1893 diff changeset	574 if pos or name:
c1088d0bb562 Ignore empty markers. Sjoerd Mullender <sjoerd@acm.org> parents: 1893 diff changeset	575 # some files appear to have
c1088d0bb562 Ignore empty markers. Sjoerd Mullender <sjoerd@acm.org> parents: 1893 diff changeset	576 # dummy markers consisting of
c1088d0bb562 Ignore empty markers. Sjoerd Mullender <sjoerd@acm.org> parents: 1893 diff changeset	577 # a position 0 and name ''
c1088d0bb562 Ignore empty markers. Sjoerd Mullender <sjoerd@acm.org> parents: 1893 diff changeset	578 self._markers.append((id, pos, name))
1315 acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	579 except EOFError:
acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	580 print 'Warning: MARK chunk contains only',
acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	581 print len(self._markers),
acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	582 if len(self._markers) == 1: print 'marker',
acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	583 else: print 'markers',
acdc0b9a6c78 * aifc.py: don't die on invalid MARK chunk Guido van Rossum <guido@python.org> parents: 1314 diff changeset	584 print 'instead of', nmarkers
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	585
1291 517d29ebc840 * ftplib.py: added abort() command (sends oob data). Guido van Rossum <guido@python.org> parents: 1208 diff changeset	586 class Aifc_write:
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	587 # Variables used in this class:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	588 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	589 # These variables are user settable through appropriate methods
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	590 # of this class:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	591 # _file -- the open file with methods write(), close(), tell(), seek()
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	592 # set through the __init__() method
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	593 # _comptype -- the AIFF-C compression type ('NONE' in AIFF)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	594 # set through the setcomptype() or setparams() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	595 # _compname -- the human-readable AIFF-C compression type
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	596 # set through the setcomptype() or setparams() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	597 # _nchannels -- the number of audio channels
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	598 # set through the setnchannels() or setparams() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	599 # _sampwidth -- the number of bytes per audio sample
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	600 # set through the setsampwidth() or setparams() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	601 # _framerate -- the sampling frequency
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	602 # set through the setframerate() or setparams() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	603 # _nframes -- the number of audio frames written to the header
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	604 # set through the setnframes() or setparams() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	605 # _aifc -- whether we're writing an AIFF-C file or an AIFF file
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	606 # set through the aifc() method, reset through the
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	607 # aiff() method
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	608 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	609 # These variables are used internally only:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	610 # _version -- the AIFF-C version number
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	611 # _comp -- the compressor from builtin module cl
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	612 # _nframeswritten -- the number of audio frames actually written
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	613 # _datalength -- the size of the audio samples written to the header
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	614 # _datawritten -- the size of the audio samples actually written
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	615
4078 18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 2948 diff changeset	616 ## if 0: access _file, _comptype, _compname, _nchannels, _sampwidth, \
18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 2948 diff changeset	617 ## _framerate, _nframes, _aifc, _version, _comp, \
18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 2948 diff changeset	618 ## _nframeswritten, _datalength, _datawritten: private
1437 e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements. Sjoerd Mullender <sjoerd@acm.org> parents: 1436 diff changeset	619
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	620 def __init__(self, f):
560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	621 if type(f) == type(''):
1436 89a5ce19d13a * aifc.py (Aifc_write): fix bogus reference to filename Guido van Rossum <guido@python.org> parents: 1435 diff changeset	622 filename = f
1893 aba51621244e audiodev.py: Mac port. Guido van Rossum <guido@python.org> parents: 1864 diff changeset	623 f = __builtin__.open(f, 'wb')
1436 89a5ce19d13a * aifc.py (Aifc_write): fix bogus reference to filename Guido van Rossum <guido@python.org> parents: 1435 diff changeset	624 else:
1437 e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements. Sjoerd Mullender <sjoerd@acm.org> parents: 1436 diff changeset	625 # else, assume it is an open file object already
1436 89a5ce19d13a * aifc.py (Aifc_write): fix bogus reference to filename Guido van Rossum <guido@python.org> parents: 1435 diff changeset	626 filename = '???'
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	627 self.initfp(f)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	628 if filename[-5:] == '.aiff':
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	629 self._aifc = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	630 else:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	631 self._aifc = 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	632
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	633 def initfp(self, file):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	634 self._file = file
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	635 self._version = _AIFC_version
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	636 self._comptype = 'NONE'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	637 self._compname = 'not compressed'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	638 self._comp = None
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	639 self._convert = None
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	640 self._nchannels = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	641 self._sampwidth = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	642 self._framerate = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	643 self._nframes = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	644 self._nframeswritten = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	645 self._datawritten = 0
1314 918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	646 self._datalength = 0
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	647 self._markers = []
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	648 self._marklength = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	649 self._aifc = 1 # AIFF-C is default
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	650
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	651 def __del__(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	652 if self._file:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	653 self.close()
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	654
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	655 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	656 # User visible methods.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	657 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	658 def aiff(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	659 if self._nframeswritten:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	660 raise Error, 'cannot change parameters after starting to write'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	661 self._aifc = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	662
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	663 def aifc(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	664 if self._nframeswritten:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	665 raise Error, 'cannot change parameters after starting to write'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	666 self._aifc = 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	667
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	668 def setnchannels(self, nchannels):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	669 if self._nframeswritten:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	670 raise Error, 'cannot change parameters after starting to write'
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	671 if nchannels < 1:
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	672 raise Error, 'bad # of channels'
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	673 self._nchannels = nchannels
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	674
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	675 def getnchannels(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	676 if not self._nchannels:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	677 raise Error, 'number of channels not set'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	678 return self._nchannels
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	679
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	680 def setsampwidth(self, sampwidth):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	681 if self._nframeswritten:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	682 raise Error, 'cannot change parameters after starting to write'
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	683 if sampwidth < 1 or sampwidth > 4:
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	684 raise Error, 'bad sample width'
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	685 self._sampwidth = sampwidth
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	686
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	687 def getsampwidth(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	688 if not self._sampwidth:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	689 raise Error, 'sample width not set'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	690 return self._sampwidth
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	691
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	692 def setframerate(self, framerate):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	693 if self._nframeswritten:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	694 raise Error, 'cannot change parameters after starting to write'
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	695 if framerate <= 0:
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	696 raise Error, 'bad frame rate'
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	697 self._framerate = framerate
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	698
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	699 def getframerate(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	700 if not self._framerate:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	701 raise Error, 'frame rate not set'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	702 return self._framerate
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	703
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	704 def setnframes(self, nframes):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	705 if self._nframeswritten:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	706 raise Error, 'cannot change parameters after starting to write'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	707 self._nframes = nframes
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	708
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	709 def getnframes(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	710 return self._nframeswritten
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	711
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	712 def setcomptype(self, comptype, compname):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	713 if self._nframeswritten:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	714 raise Error, 'cannot change parameters after starting to write'
1864 aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	715 if comptype not in ('NONE', 'ULAW', 'ALAW', 'G722'):
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	716 raise Error, 'unsupported compression type'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	717 self._comptype = comptype
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	718 self._compname = compname
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	719
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	720 def getcomptype(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	721 return self._comptype
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	722
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	723 def getcompname(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	724 return self._compname
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	725
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	726 ## def setversion(self, version):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	727 ## if self._nframeswritten:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	728 ## raise Error, 'cannot change parameters after starting to write'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	729 ## self._version = version
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	730
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	731 def setparams(self, (nchannels, sampwidth, framerate, nframes, comptype, compname)):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	732 if self._nframeswritten:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	733 raise Error, 'cannot change parameters after starting to write'
1864 aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	734 if comptype not in ('NONE', 'ULAW', 'ALAW', 'G722'):
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	735 raise Error, 'unsupported compression type'
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	736 self.setnchannels(nchannels)
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	737 self.setsampwidth(sampwidth)
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	738 self.setframerate(framerate)
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	739 self.setnframes(nframes)
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	740 self.setcomptype(comptype, compname)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	741
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	742 def getparams(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	743 if not self._nchannels or not self._sampwidth or not self._framerate:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	744 raise Error, 'not all parameters set'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	745 return self._nchannels, self._sampwidth, self._framerate, \
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	746 self._nframes, self._comptype, self._compname
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	747
1193 b7aee799dc71 Found and fixed a few bugs in the handling of audio files with MARKs. Sjoerd Mullender <sjoerd@acm.org> parents: 1192 diff changeset	748 def setmark(self, id, pos, name):
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	749 if id <= 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	750 raise Error, 'marker ID must be > 0'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	751 if pos < 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	752 raise Error, 'marker position must be >= 0'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	753 if type(name) != type(''):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	754 raise Error, 'marker name must be a string'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	755 for i in range(len(self._markers)):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	756 if id == self._markers[i][0]:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	757 self._markers[i] = id, pos, name
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	758 return
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	759 self._markers.append((id, pos, name))
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	760
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	761 def getmark(self, id):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	762 for marker in self._markers:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	763 if id == marker[0]:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	764 return marker
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	765 raise Error, 'marker ' + `id` + ' does not exist'
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	766
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	767 def getmarkers(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	768 if len(self._markers) == 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	769 return None
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	770 return self._markers
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	771
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	772 def tell(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	773 return self._nframeswritten
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	774
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	775 def writeframesraw(self, data):
1314 918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	776 self._ensure_header_written(len(data))
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	777 nframes = len(data) / (self._sampwidth * self._nchannels)
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	778 if self._convert:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	779 data = self._convert(data)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	780 self._file.write(data)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	781 self._nframeswritten = self._nframeswritten + nframes
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	782 self._datawritten = self._datawritten + len(data)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	783
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	784 def writeframes(self, data):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	785 self.writeframesraw(data)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	786 if self._nframeswritten != self._nframes or \
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	787 self._datalength != self._datawritten:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	788 self._patchheader()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	789
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	790 def close(self):
1314 918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	791 self._ensure_header_written(0)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	792 if self._datawritten & 1:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	793 # quick pad to even size
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	794 self._file.write(chr(0))
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	795 self._datawritten = self._datawritten + 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	796 self._writemarkers()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	797 if self._nframeswritten != self._nframes or \
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	798 self._datalength != self._datawritten or \
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	799 self._marklength:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	800 self._patchheader()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	801 if self._comp:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	802 self._comp.CloseCompressor()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	803 self._comp = None
1423 0b32ec8a3e20 Don't close the file. Sjoerd Mullender <sjoerd@acm.org> parents: 1419 diff changeset	804 self._file.flush()
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	805 self._file = None
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	806
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	807 #
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	808 # Internal methods.
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	809 #
4078 18451dca9469 Get rid of access statement Guido van Rossum <guido@python.org> parents: 2948 diff changeset	810 ## if 0: access *: private
1437 e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements. Sjoerd Mullender <sjoerd@acm.org> parents: 1436 diff changeset	811
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	812 def _comp_data(self, data):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	813 dum = self._comp.SetParam(CL.FRAME_BUFFER_SIZE, len(data))
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	814 dum = self._comp.SetParam(CL.COMPRESSED_BUFFER_SIZE, len(data))
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	815 return self._comp.Compress(nframes, data)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	816
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	817 def _lin2ulaw(self, data):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	818 import audioop
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	819 return audioop.lin2ulaw(data, 2)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	820
1864 aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	821 def _lin2adpcm(self, data):
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	822 import audioop
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	823 if not hasattr(self, '_adpcmstate'):
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	824 self._adpcmstate = None
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	825 data, self._adpcmstate = audioop.lin2adpcm(data, 2,
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	826 self._adpcmstate)
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	827 return data
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	828
1314 918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	829 def _ensure_header_written(self, datasize):
918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	830 if not self._nframeswritten:
918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	831 if self._comptype in ('ULAW', 'ALAW'):
918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	832 if not self._sampwidth:
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	833 self._sampwidth = 2
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	834 if self._sampwidth != 2:
1314 918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	835 raise Error, 'sample width must be 2 when compressing with ULAW or ALAW'
1864 aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	836 if self._comptype == 'G722':
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	837 if not self._sampwidth:
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	838 self._sampwidth = 2
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	839 if self._sampwidth != 2:
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	840 raise Error, 'sample width must be 2 when compressing with G7.22 (ADPCM)'
1314 918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	841 if not self._nchannels:
918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	842 raise Error, '# channels not specified'
918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	843 if not self._sampwidth:
918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	844 raise Error, 'sample width not specified'
918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	845 if not self._framerate:
918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	846 raise Error, 'sampling rate not specified'
918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	847 self._write_header(datasize)
918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	848
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	849 def _init_compression(self):
1864 aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	850 if self._comptype == 'G722':
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	851 import audioop
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	852 self._convert = self._lin2adpcm
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	853 return
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	854 try:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	855 import cl, CL
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	856 except ImportError:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	857 if self._comptype == 'ULAW':
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	858 try:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	859 import audioop
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	860 self._convert = self._lin2ulaw
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	861 return
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	862 except ImportError:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	863 pass
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	864 raise Error, 'cannot write compressed AIFF-C files'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	865 if self._comptype == 'ULAW':
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	866 scheme = CL.G711_ULAW
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	867 elif self._comptype == 'ALAW':
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	868 scheme = CL.G711_ALAW
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	869 else:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	870 raise Error, 'unsupported compression type'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	871 self._comp = cl.OpenCompressor(scheme)
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	872 params = [CL.ORIGINAL_FORMAT, 0,
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	873 CL.BITS_PER_COMPONENT, self._sampwidth * 8,
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	874 CL.FRAME_RATE, self._framerate,
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	875 CL.FRAME_BUFFER_SIZE, 100,
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	876 CL.COMPRESSED_BUFFER_SIZE, 100]
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	877 if self._nchannels == 1:
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	878 params[1] = CL.MONO
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	879 elif self._nchannels == 2:
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	880 params[1] = CL.STEREO_INTERLEAVED
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	881 else:
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	882 raise Error, 'cannot compress more than 2 channels'
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	883 self._comp.SetParams(params)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	884 # the compressor produces a header which we ignore
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	885 dummy = self._comp.Compress(0, '')
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	886 self._convert = self._comp_data
204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	887
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	888 def _write_header(self, initlength):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	889 if self._aifc and self._comptype != 'NONE':
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	890 self._init_compression()
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	891 self._file.write('FORM')
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	892 if not self._nframes:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	893 self._nframes = initlength / (self._nchannels * self._sampwidth)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	894 self._datalength = self._nframes * self._nchannels * self._sampwidth
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	895 if self._datalength & 1:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	896 self._datalength = self._datalength + 1
1864 aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	897 if self._aifc:
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	898 if self._comptype in ('ULAW', 'ALAW'):
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	899 self._datalength = self._datalength / 2
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	900 if self._datalength & 1:
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	901 self._datalength = self._datalength + 1
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	902 elif self._comptype == 'G722':
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	903 self._datalength = (self._datalength + 3) / 4
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	904 if self._datalength & 1:
aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	905 self._datalength = self._datalength + 1
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	906 self._form_length_pos = self._file.tell()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	907 commlength = self._write_form_length(self._datalength)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	908 if self._aifc:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	909 self._file.write('AIFC')
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	910 self._file.write('FVER')
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	911 _write_long(self._file, 4)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	912 _write_long(self._file, self._version)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	913 else:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	914 self._file.write('AIFF')
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	915 self._file.write('COMM')
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	916 _write_long(self._file, commlength)
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	917 _write_short(self._file, self._nchannels)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	918 self._nframes_pos = self._file.tell()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	919 _write_long(self._file, self._nframes)
1498 a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	920 _write_short(self._file, self._sampwidth * 8)
a75f70ca1be0 Removed silly dependence on AL module. Sjoerd Mullender <sjoerd@acm.org> parents: 1437 diff changeset	921 _write_float(self._file, self._framerate)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	922 if self._aifc:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	923 self._file.write(self._comptype)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	924 _write_string(self._file, self._compname)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	925 self._file.write('SSND')
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	926 self._ssnd_length_pos = self._file.tell()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	927 _write_long(self._file, self._datalength + 8)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	928 _write_long(self._file, 0)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	929 _write_long(self._file, 0)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	930
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	931 def _write_form_length(self, datalength):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	932 if self._aifc:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	933 commlength = 18 + 5 + len(self._compname)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	934 if commlength & 1:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	935 commlength = commlength + 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	936 verslength = 12
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	937 else:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	938 commlength = 18
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	939 verslength = 0
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	940 _write_long(self._file, 4 + verslength + self._marklength + \
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	941 8 + commlength + 16 + datalength)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	942 return commlength
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	943
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	944 def _patchheader(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	945 curpos = self._file.tell()
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	946 if self._datawritten & 1:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	947 datalength = self._datawritten + 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	948 self._file.write(chr(0))
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	949 else:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	950 datalength = self._datawritten
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	951 if datalength == self._datalength and \
1193 b7aee799dc71 Found and fixed a few bugs in the handling of audio files with MARKs. Sjoerd Mullender <sjoerd@acm.org> parents: 1192 diff changeset	952 self._nframes == self._nframeswritten and \
b7aee799dc71 Found and fixed a few bugs in the handling of audio files with MARKs. Sjoerd Mullender <sjoerd@acm.org> parents: 1192 diff changeset	953 self._marklength == 0:
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	954 self._file.seek(curpos, 0)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	955 return
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	956 self._file.seek(self._form_length_pos, 0)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	957 dummy = self._write_form_length(datalength)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	958 self._file.seek(self._nframes_pos, 0)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	959 _write_long(self._file, self._nframeswritten)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	960 self._file.seek(self._ssnd_length_pos, 0)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	961 _write_long(self._file, datalength + 8)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	962 self._file.seek(curpos, 0)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	963 self._nframes = self._nframeswritten
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	964 self._datalength = datalength
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	965
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	966 def _writemarkers(self):
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	967 if len(self._markers) == 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	968 return
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	969 self._file.write('MARK')
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	970 length = 2
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	971 for marker in self._markers:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	972 id, pos, name = marker
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	973 length = length + len(name) + 1 + 6
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	974 if len(name) & 1 == 0:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	975 length = length + 1
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	976 _write_long(self._file, length)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	977 self._marklength = length + 8
1193 b7aee799dc71 Found and fixed a few bugs in the handling of audio files with MARKs. Sjoerd Mullender <sjoerd@acm.org> parents: 1192 diff changeset	978 _write_short(self._file, len(self._markers))
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	979 for marker in self._markers:
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	980 id, pos, name = marker
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	981 _write_short(self._file, id)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	982 _write_long(self._file, pos)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	983 _write_string(self._file, name)
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	984
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	985 def open(f, mode):
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	986 if mode == 'r':
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	987 return Aifc_read(f)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	988 elif mode == 'w':
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	989 return Aifc_write(f)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	990 else:
1437 e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements. Sjoerd Mullender <sjoerd@acm.org> parents: 1436 diff changeset	991 raise Error, "mode must be 'r' or 'w'"
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	992
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	993 openfp = open # B/W compatibility
4845 0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	994
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	995 if __name__ == '__main__':
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	996 import sys
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	997 if not sys.argv[1:]:
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	998 sys.argv.append('/usr/demos/data/audio/bach.aiff')
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	999 fn = sys.argv[1]
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1000 f = open(fn, 'r')
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1001 print "Reading", fn
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1002 print "nchannels =", f.getnchannels()
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1003 print "nframes =", f.getnframes()
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1004 print "sampwidth =", f.getsampwidth()
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1005 print "framerate =", f.getframerate()
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1006 print "comptype =", f.getcomptype()
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1007 print "compname =", f.getcompname()
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1008 if sys.argv[2:]:
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1009 gn = sys.argv[2]
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1010 print "Writing", gn
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1011 g = open(gn, 'w')
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1012 g.setparams(f.getparams())
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1013 while 1:
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1014 data = f.readframes(1024)
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1015 if not data:
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1016 break
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1017 g.writeframes(data)
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1018 g.close()
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1019 f.close()
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	1020 print "Done."

Mercurial > cpython-lru_cache-weakref

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