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

annotate Lib/aifc.py @ 79675:c0a2294de787 2.7

Issue #16199: Backport 2to3 typo fix from 3.2.

author	Chris Jerdonek <chris.jerdonek@gmail.com>
date	Thu, 11 Oct 2012 16:15:46 -0700
parents	8fac90d0f4cd
children	cf8d692cc847

rev	line source
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	1 """Stuff to parse AIFF-C and AIFF files.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	2
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	3 Unless explicitly stated otherwise, the description below is true
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	4 both for AIFF-C files and AIFF files.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	5
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	6 An AIFF-C file has the following structure.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	7
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	8 +-----------------+
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	9 \| FORM \|
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	10 +-----------------+
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	11 \| <size> \|
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	12 +----+------------+
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	13 \| \| AIFC \|
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	14 \| +------------+
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	15 \| \| <chunks> \|
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	16 \| \| . \|
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	17 \| \| . \|
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	18 \| \| . \|
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	19 +----+------------+
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	20
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	21 An AIFF file has the string "AIFF" instead of "AIFC".
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	22
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	23 A chunk consists of an identifier (4 bytes) followed by a size (4 bytes,
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	24 big endian order), followed by the data. The size field does not include
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	25 the size of the 8 byte header.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	26
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	27 The following chunk types are recognized.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	28
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	29 FVER
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	30 <version number of AIFF-C defining document> (AIFF-C only).
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	31 MARK
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	32 <# of markers> (2 bytes)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	33 list of markers:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	34 <marker ID> (2 bytes, must be > 0)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	35 <position> (4 bytes)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	36 <marker name> ("pstring")
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	37 COMM
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	38 <# of channels> (2 bytes)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	39 <# of sound frames> (4 bytes)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	40 <size of the samples> (2 bytes)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	41 <sampling frequency> (10 bytes, IEEE 80-bit extended
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	42 floating point)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	43 in AIFF-C files only:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	44 <compression type> (4 bytes)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	45 <human-readable version of compression type> ("pstring")
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	46 SSND
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	47 <offset> (4 bytes, not used by this program)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	48 <blocksize> (4 bytes, not used by this program)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	49 <sound data>
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	50
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	51 A pstring consists of 1 byte length, a string of characters, and 0 or 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	52 byte pad to make the total length even.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	53
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	54 Usage.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	55
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	56 Reading AIFF files:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	57 f = aifc.open(file, 'r')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	58 where file is either the name of a file or an open file pointer.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	59 The open file pointer must have methods read(), seek(), and close().
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	60 In some types of audio files, if the setpos() method is not used,
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	61 the seek() method is not necessary.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	62
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	63 This returns an instance of a class with the following public methods:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	64 getnchannels() -- returns number of audio channels (1 for
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	65 mono, 2 for stereo)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	66 getsampwidth() -- returns sample width in bytes
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	67 getframerate() -- returns sampling frequency
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	68 getnframes() -- returns number of audio frames
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	69 getcomptype() -- returns compression type ('NONE' for AIFF files)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	70 getcompname() -- returns human-readable version of
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	71 compression type ('not compressed' for AIFF files)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	72 getparams() -- returns a tuple consisting of all of the
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	73 above in the above order
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	74 getmarkers() -- get the list of marks in the audio file or None
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	75 if there are no marks
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	76 getmark(id) -- get mark with the specified id (raises an error
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	77 if the mark does not exist)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	78 readframes(n) -- returns at most n frames of audio
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	79 rewind() -- rewind to the beginning of the audio stream
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	80 setpos(pos) -- seek to the specified position
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	81 tell() -- return the current position
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	82 close() -- close the instance (make it unusable)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	83 The position returned by tell(), the position given to setpos() and
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	84 the position of marks are all compatible and have nothing to do with
13620 5b727ab37092 Spelling fixes supplied by Rob W. W. Hooft. All these are fixes in either Thomas Wouters <thomas@python.org> parents: 11940 diff changeset	85 the actual position in the file.
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	86 The close() method is called automatically when the class instance
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	87 is destroyed.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	88
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	89 Writing AIFF files:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	90 f = aifc.open(file, 'w')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	91 where file is either the name of a file or an open file pointer.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	92 The open file pointer must have methods write(), tell(), seek(), and
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	93 close().
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	94
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	95 This returns an instance of a class with the following public methods:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	96 aiff() -- create an AIFF file (AIFF-C default)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	97 aifc() -- create an AIFF-C file
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	98 setnchannels(n) -- set the number of channels
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	99 setsampwidth(n) -- set the sample width
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	100 setframerate(n) -- set the frame rate
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	101 setnframes(n) -- set the number of frames
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	102 setcomptype(type, name)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	103 -- set the compression type and the
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	104 human-readable compression type
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	105 setparams(tuple)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	106 -- set all parameters at once
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	107 setmark(id, pos, name)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	108 -- add specified mark to the list of marks
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	109 tell() -- return current position in output file (useful
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	110 in combination with setmark())
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	111 writeframesraw(data)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	112 -- write audio frames without pathing up the
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	113 file header
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	114 writeframes(data)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	115 -- write audio frames and patch up the file header
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	116 close() -- patch up the file header and close the
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	117 output file
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	118 You should set the parameters before the first writeframesraw or
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	119 writeframes. The total number of frames does not need to be set,
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	120 but when it is set to the correct value, the header does not have to
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	121 be patched up.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	122 It is best to first set all parameters, perhaps possibly the
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	123 compression type, and then write audio frames using writeframesraw.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	124 When all frames have been written, either call writeframes('') or
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	125 close() to patch up the sizes in the header.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	126 Marks can be added anytime. If there are any marks, ypu must call
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	127 close() after all frames have been written.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	128 The close() method is called automatically when the class instance
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	129 is destroyed.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	130
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	131 When a file is opened with the extension '.aiff', an AIFF file is
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	132 written, otherwise an AIFF-C file is written. This default can be
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	133 changed by calling aiff() or aifc() before the first writeframes or
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	134 writeframesraw.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	135 """
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	136
4845 0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	137 import struct
1540 4047f224efdb Use __builtin__ instead of builtin Guido van Rossum <guido@python.org> parents: 1539 diff changeset	138 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	139
16070 b5345e99596b added __all__ lists to a number of Python modules Skip Montanaro <skip@pobox.com> parents: 15857 diff changeset	140 __all__ = ["Error","open","openfp"]
b5345e99596b added __all__ lists to a number of Python modules Skip Montanaro <skip@pobox.com> parents: 15857 diff changeset	141
14022 d44603f2b928 Convert some old-style string exceptions to class exceptions. Fred Drake <fdrake@acm.org> parents: 13620 diff changeset	142 class Error(Exception):
d44603f2b928 Convert some old-style string exceptions to class exceptions. Fred Drake <fdrake@acm.org> parents: 13620 diff changeset	143 pass
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	144
24776 fe3472f2f8eb Fix wanrings about unsigned hex constants. Guido van Rossum <guido@python.org> parents: 21916 diff changeset	145 _AIFC_version = 0xA2805140L # Version 1 of AIFF-C
1192 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 def _read_long(file):
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	148 try:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	149 return struct.unpack('>l', file.read(4))[0]
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	150 except struct.error:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	151 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	152
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	153 def _read_ulong(file):
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	154 try:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	155 return struct.unpack('>L', file.read(4))[0]
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	156 except struct.error:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	157 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	158
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	159 def _read_short(file):
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	160 try:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	161 return struct.unpack('>h', file.read(2))[0]
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	162 except struct.error:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	163 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	164
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	165 def _read_ushort(file):
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	166 try:
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	167 return struct.unpack('>H', file.read(2))[0]
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	168 except struct.error:
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	169 raise EOFError
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	170
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	171 def _read_string(file):
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	172 length = ord(file.read(1))
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	173 if length == 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	174 data = ''
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	175 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	176 data = file.read(length)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	177 if length & 1 == 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	178 dummy = file.read(1)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	179 return data
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	180
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	181 _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	182
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	183 def _read_float(f): # 10 bytes
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	184 expon = _read_short(f) # 2 bytes
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	185 sign = 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	186 if expon < 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	187 sign = -1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	188 expon = expon + 0x8000
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	189 himant = _read_ulong(f) # 4 bytes
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	190 lomant = _read_ulong(f) # 4 bytes
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	191 if expon == himant == lomant == 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	192 f = 0.0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	193 elif expon == 0x7FFF:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	194 f = _HUGE_VAL
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	195 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	196 expon = expon - 16383
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	197 f = (himant * 0x100000000L + lomant) * pow(2.0, expon - 63)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	198 return sign * f
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	199
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	200 def _write_short(f, x):
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	201 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	202
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	203 def _write_ushort(f, x):
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	204 f.write(struct.pack('>H', x))
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	205
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	206 def _write_long(f, x):
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	207 f.write(struct.pack('>l', x))
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	208
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	209 def _write_ulong(f, x):
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	210 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	211
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	212 def _write_string(f, s):
38494 4e4e653a80bf Add a length check to aifc to ensure it doesn't write a bogus file Bob Ippolito <bob@redivi.com> parents: 31515 diff changeset	213 if len(s) > 255:
4e4e653a80bf Add a length check to aifc to ensure it doesn't write a bogus file Bob Ippolito <bob@redivi.com> parents: 31515 diff changeset	214 raise ValueError("string exceeds maximum pstring length")
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	215 f.write(struct.pack('B', len(s)))
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	216 f.write(s)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	217 if len(s) & 1 == 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	218 f.write(chr(0))
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	219
78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	220 def _write_float(f, x):
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	221 import math
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	222 if x < 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	223 sign = 0x8000
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	224 x = x * -1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	225 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	226 sign = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	227 if x == 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	228 expon = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	229 himant = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	230 lomant = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	231 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	232 fmant, expon = math.frexp(x)
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	233 if expon > 16384 or fmant >= 1 or fmant != fmant: # Infinity or NaN
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	234 expon = sign\|0x7FFF
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	235 himant = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	236 lomant = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	237 else: # Finite
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	238 expon = expon + 16382
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	239 if expon < 0: # denormalized
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	240 fmant = math.ldexp(fmant, expon)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	241 expon = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	242 expon = expon \| sign
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	243 fmant = math.ldexp(fmant, 32)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	244 fsmant = math.floor(fmant)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	245 himant = long(fsmant)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	246 fmant = math.ldexp(fmant - fsmant, 32)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	247 fsmant = math.floor(fmant)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	248 lomant = long(fsmant)
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	249 _write_ushort(f, expon)
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	250 _write_ulong(f, himant)
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	251 _write_ulong(f, lomant)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	252
10937 e8ff4b1298c2 Patch/new code by Sjoerd Mullender: Guido van Rossum <guido@python.org> parents: 10817 diff changeset	253 from chunk import Chunk
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	254
1291 517d29ebc840 * ftplib.py: added abort() command (sends oob data). Guido van Rossum <guido@python.org> parents: 1208 diff changeset	255 class Aifc_read:
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	256 # Variables used in this class:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	257 #
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	258 # These variables are available to the user though appropriate
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	259 # methods of this class:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	260 # _file -- the open file with methods read(), close(), and seek()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	261 # set through the __init__() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	262 # _nchannels -- the number of audio channels
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	263 # available through the getnchannels() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	264 # _nframes -- the number of audio frames
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	265 # available through the getnframes() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	266 # _sampwidth -- the number of bytes per audio sample
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	267 # available through the getsampwidth() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	268 # _framerate -- the sampling frequency
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	269 # available through the getframerate() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	270 # _comptype -- the AIFF-C compression type ('NONE' if AIFF)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	271 # available through the getcomptype() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	272 # _compname -- the human-readable AIFF-C compression type
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	273 # available through the getcomptype() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	274 # _markers -- the marks in the audio file
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	275 # available through the getmarkers() and getmark()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	276 # methods
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	277 # _soundpos -- the position in the audio stream
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	278 # available through the tell() method, set through the
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	279 # setpos() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	280 #
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	281 # These variables are used internally only:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	282 # _version -- the AIFF-C version number
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	283 # _decomp -- the decompressor from builtin module cl
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	284 # _comm_chunk_read -- 1 iff the COMM chunk has been read
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	285 # _aifc -- 1 iff reading an AIFF-C file
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	286 # _ssnd_seek_needed -- 1 iff positioned correctly in audio
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	287 # file for readframes()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	288 # _ssnd_chunk -- instantiation of a chunk class for the SSND chunk
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	289 # _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	290
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	291 def initfp(self, file):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	292 self._version = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	293 self._decomp = None
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	294 self._convert = None
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	295 self._markers = []
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	296 self._soundpos = 0
53876 7a3bd179b180 Merged revisions 72422,72425-72426 via svnmerge from R. David Murray <rdmurray@bitdance.com> parents: 53598 diff changeset	297 self._file = file
7a3bd179b180 Merged revisions 72422,72425-72426 via svnmerge from R. David Murray <rdmurray@bitdance.com> parents: 53598 diff changeset	298 chunk = Chunk(file)
7a3bd179b180 Merged revisions 72422,72425-72426 via svnmerge from R. David Murray <rdmurray@bitdance.com> parents: 53598 diff changeset	299 if chunk.getname() != 'FORM':
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	300 raise Error, 'file does not start with FORM id'
53876 7a3bd179b180 Merged revisions 72422,72425-72426 via svnmerge from R. David Murray <rdmurray@bitdance.com> parents: 53598 diff changeset	301 formdata = chunk.read(4)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	302 if formdata == 'AIFF':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	303 self._aifc = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	304 elif formdata == 'AIFC':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	305 self._aifc = 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	306 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	307 raise Error, 'not an AIFF or AIFF-C file'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	308 self._comm_chunk_read = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	309 while 1:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	310 self._ssnd_seek_needed = 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	311 try:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	312 chunk = Chunk(self._file)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	313 except EOFError:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	314 break
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	315 chunkname = chunk.getname()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	316 if chunkname == 'COMM':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	317 self._read_comm_chunk(chunk)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	318 self._comm_chunk_read = 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	319 elif chunkname == 'SSND':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	320 self._ssnd_chunk = chunk
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	321 dummy = chunk.read(8)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	322 self._ssnd_seek_needed = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	323 elif chunkname == 'FVER':
24776 fe3472f2f8eb Fix wanrings about unsigned hex constants. Guido van Rossum <guido@python.org> parents: 21916 diff changeset	324 self._version = _read_ulong(chunk)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	325 elif chunkname == 'MARK':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	326 self._readmark(chunk)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	327 chunk.skip()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	328 if not self._comm_chunk_read or not self._ssnd_chunk:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	329 raise Error, 'COMM chunk and/or SSND chunk missing'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	330 if self._aifc and self._decomp:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	331 import cl
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	332 params = [cl.ORIGINAL_FORMAT, 0,
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	333 cl.BITS_PER_COMPONENT, self._sampwidth * 8,
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	334 cl.FRAME_RATE, self._framerate]
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	335 if self._nchannels == 1:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	336 params[1] = cl.MONO
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	337 elif self._nchannels == 2:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	338 params[1] = cl.STEREO_INTERLEAVED
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	339 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	340 raise Error, 'cannot compress more than 2 channels'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	341 self._decomp.SetParams(params)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	342
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	343 def __init__(self, f):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	344 if type(f) == type(''):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	345 f = __builtin__.open(f, 'rb')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	346 # else, assume it is an open file object already
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	347 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	348
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	349 #
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	350 # User visible methods.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	351 #
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	352 def getfp(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	353 return 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	354
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	355 def rewind(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	356 self._ssnd_seek_needed = 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	357 self._soundpos = 0
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	358
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	359 def close(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	360 if self._decomp:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	361 self._decomp.CloseDecompressor()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	362 self._decomp = None
53876 7a3bd179b180 Merged revisions 72422,72425-72426 via svnmerge from R. David Murray <rdmurray@bitdance.com> parents: 53598 diff changeset	363 self._file.close()
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	364
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	365 def tell(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	366 return self._soundpos
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	367
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	368 def getnchannels(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	369 return 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	370
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	371 def getnframes(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	372 return self._nframes
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	373
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	374 def getsampwidth(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	375 return 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	376
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	377 def getframerate(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	378 return 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	379
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	380 def getcomptype(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	381 return self._comptype
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	382
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	383 def getcompname(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	384 return self._compname
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	385
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	386 ## def getversion(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	387 ## return self._version
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	388
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	389 def getparams(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	390 return self.getnchannels(), self.getsampwidth(), \
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	391 self.getframerate(), self.getnframes(), \
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	392 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	393
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	394 def getmarkers(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	395 if len(self._markers) == 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	396 return None
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	397 return 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	398
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	399 def getmark(self, id):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	400 for marker in self._markers:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	401 if id == marker[0]:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	402 return marker
31515 71a294bd7950 Replace backticks with repr() or "%r" Walter Dörwald <walter@livinglogic.de> parents: 24776 diff changeset	403 raise Error, 'marker %r does not exist' % (id,)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	404
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	405 def setpos(self, pos):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	406 if pos < 0 or pos > self._nframes:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	407 raise Error, 'position not in range'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	408 self._soundpos = pos
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	409 self._ssnd_seek_needed = 1
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	410
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	411 def readframes(self, nframes):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	412 if self._ssnd_seek_needed:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	413 self._ssnd_chunk.seek(0)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	414 dummy = self._ssnd_chunk.read(8)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	415 pos = self._soundpos * self._framesize
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	416 if pos:
11940 de8404573fe5 Sjoerd Mullender: Guido van Rossum <guido@python.org> parents: 11691 diff changeset	417 self._ssnd_chunk.seek(pos + 8)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	418 self._ssnd_seek_needed = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	419 if nframes == 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	420 return ''
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	421 data = self._ssnd_chunk.read(nframes * self._framesize)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	422 if self._convert and data:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	423 data = self._convert(data)
63639 4c0b37d869ca Merged revisions 75407,75409-75413,75415,75419-75421 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 53876 diff changeset	424 self._soundpos = self._soundpos + len(data) // (self._nchannels * self._sampwidth)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	425 return data
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	426
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	427 #
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	428 # Internal methods.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	429 #
1437 e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements. Sjoerd Mullender <sjoerd@acm.org> parents: 1436 diff changeset	430
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	431 def _decomp_data(self, data):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	432 import cl
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	433 dummy = self._decomp.SetParam(cl.FRAME_BUFFER_SIZE,
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	434 len(data) * 2)
63639 4c0b37d869ca Merged revisions 75407,75409-75413,75415,75419-75421 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 53876 diff changeset	435 return self._decomp.Decompress(len(data) // self._nchannels,
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	436 data)
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	437
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	438 def _ulaw2lin(self, data):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	439 import audioop
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	440 return audioop.ulaw2lin(data, 2)
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	441
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	442 def _adpcm2lin(self, data):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	443 import audioop
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	444 if not hasattr(self, '_adpcmstate'):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	445 # first time
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	446 self._adpcmstate = None
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	447 data, self._adpcmstate = audioop.adpcm2lin(data, 2,
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	448 self._adpcmstate)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	449 return data
1864 aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	450
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	451 def _read_comm_chunk(self, chunk):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	452 self._nchannels = _read_short(chunk)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	453 self._nframes = _read_long(chunk)
63639 4c0b37d869ca Merged revisions 75407,75409-75413,75415,75419-75421 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 53876 diff changeset	454 self._sampwidth = (_read_short(chunk) + 7) // 8
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	455 self._framerate = int(_read_float(chunk))
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	456 self._framesize = self._nchannels * self._sampwidth
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	457 if self._aifc:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	458 #DEBUG: SGI's soundeditor produces a bad size :-(
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	459 kludge = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	460 if chunk.chunksize == 18:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	461 kludge = 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	462 print 'Warning: bad COMM chunk size'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	463 chunk.chunksize = 23
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	464 #DEBUG end
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	465 self._comptype = chunk.read(4)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	466 #DEBUG start
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	467 if kludge:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	468 length = ord(chunk.file.read(1))
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	469 if length & 1 == 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	470 length = length + 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	471 chunk.chunksize = chunk.chunksize + length
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	472 chunk.file.seek(-1, 1)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	473 #DEBUG end
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	474 self._compname = _read_string(chunk)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	475 if self._comptype != 'NONE':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	476 if self._comptype == 'G722':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	477 try:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	478 import audioop
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	479 except ImportError:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	480 pass
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	481 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	482 self._convert = self._adpcm2lin
63639 4c0b37d869ca Merged revisions 75407,75409-75413,75415,75419-75421 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 53876 diff changeset	483 self._framesize = self._framesize // 4
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	484 return
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	485 # for ULAW and ALAW try Compression Library
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	486 try:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	487 import cl
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	488 except ImportError:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	489 if self._comptype == 'ULAW':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	490 try:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	491 import audioop
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	492 self._convert = self._ulaw2lin
63639 4c0b37d869ca Merged revisions 75407,75409-75413,75415,75419-75421 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 53876 diff changeset	493 self._framesize = self._framesize // 2
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	494 return
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	495 except ImportError:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	496 pass
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	497 raise Error, 'cannot read compressed AIFF-C files'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	498 if self._comptype == 'ULAW':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	499 scheme = cl.G711_ULAW
63639 4c0b37d869ca Merged revisions 75407,75409-75413,75415,75419-75421 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 53876 diff changeset	500 self._framesize = self._framesize // 2
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	501 elif self._comptype == 'ALAW':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	502 scheme = cl.G711_ALAW
63639 4c0b37d869ca Merged revisions 75407,75409-75413,75415,75419-75421 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 53876 diff changeset	503 self._framesize = self._framesize // 2
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	504 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	505 raise Error, 'unsupported compression type'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	506 self._decomp = cl.OpenDecompressor(scheme)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	507 self._convert = self._decomp_data
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	508 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	509 self._comptype = 'NONE'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	510 self._compname = 'not compressed'
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	511
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	512 def _readmark(self, chunk):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	513 nmarkers = _read_short(chunk)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	514 # Some files appear to contain invalid counts.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	515 # Cope with this by testing for EOF.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	516 try:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	517 for i in range(nmarkers):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	518 id = _read_short(chunk)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	519 pos = _read_long(chunk)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	520 name = _read_string(chunk)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	521 if pos or name:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	522 # some files appear to have
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	523 # dummy markers consisting of
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	524 # a position 0 and name ''
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	525 self._markers.append((id, pos, name))
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	526 except EOFError:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	527 print 'Warning: MARK chunk contains only',
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	528 print len(self._markers),
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	529 if len(self._markers) == 1: print 'marker',
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	530 else: print 'markers',
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	531 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	532
1291 517d29ebc840 * ftplib.py: added abort() command (sends oob data). Guido van Rossum <guido@python.org> parents: 1208 diff changeset	533 class Aifc_write:
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	534 # Variables used in this class:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	535 #
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	536 # These variables are user settable through appropriate methods
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	537 # of this class:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	538 # _file -- the open file with methods write(), close(), tell(), seek()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	539 # set through the __init__() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	540 # _comptype -- the AIFF-C compression type ('NONE' in AIFF)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	541 # set through the setcomptype() or setparams() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	542 # _compname -- the human-readable AIFF-C compression type
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	543 # set through the setcomptype() or setparams() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	544 # _nchannels -- the number of audio channels
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	545 # set through the setnchannels() or setparams() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	546 # _sampwidth -- the number of bytes per audio sample
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	547 # set through the setsampwidth() or setparams() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	548 # _framerate -- the sampling frequency
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	549 # set through the setframerate() or setparams() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	550 # _nframes -- the number of audio frames written to the header
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	551 # set through the setnframes() or setparams() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	552 # _aifc -- whether we're writing an AIFF-C file or an AIFF file
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	553 # set through the aifc() method, reset through the
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	554 # aiff() method
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	555 #
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	556 # These variables are used internally only:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	557 # _version -- the AIFF-C version number
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	558 # _comp -- the compressor from builtin module cl
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	559 # _nframeswritten -- the number of audio frames actually written
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	560 # _datalength -- the size of the audio samples written to the header
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	561 # _datawritten -- the size of the audio samples actually written
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	562
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	563 def __init__(self, f):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	564 if type(f) == type(''):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	565 filename = f
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	566 f = __builtin__.open(f, 'wb')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	567 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	568 # else, assume it is an open file object already
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	569 filename = '???'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	570 self.initfp(f)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	571 if filename[-5:] == '.aiff':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	572 self._aifc = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	573 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	574 self._aifc = 1
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	575
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	576 def initfp(self, file):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	577 self._file = file
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	578 self._version = _AIFC_version
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	579 self._comptype = 'NONE'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	580 self._compname = 'not compressed'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	581 self._comp = None
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	582 self._convert = None
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	583 self._nchannels = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	584 self._sampwidth = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	585 self._framerate = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	586 self._nframes = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	587 self._nframeswritten = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	588 self._datawritten = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	589 self._datalength = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	590 self._markers = []
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	591 self._marklength = 0
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	592 self._aifc = 1 # AIFF-C is default
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	593
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	594 def __del__(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	595 if self._file:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	596 self.close()
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	597
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	598 #
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	599 # User visible methods.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	600 #
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	601 def aiff(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	602 if self._nframeswritten:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	603 raise Error, 'cannot change parameters after starting to write'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	604 self._aifc = 0
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	605
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	606 def aifc(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	607 if self._nframeswritten:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	608 raise Error, 'cannot change parameters after starting to write'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	609 self._aifc = 1
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	610
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	611 def setnchannels(self, nchannels):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	612 if self._nframeswritten:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	613 raise Error, 'cannot change parameters after starting to write'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	614 if nchannels < 1:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	615 raise Error, 'bad # of channels'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	616 self._nchannels = nchannels
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	617
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	618 def getnchannels(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	619 if not self._nchannels:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	620 raise Error, 'number of channels not set'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	621 return 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	622
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	623 def setsampwidth(self, sampwidth):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	624 if self._nframeswritten:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	625 raise Error, 'cannot change parameters after starting to write'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	626 if sampwidth < 1 or sampwidth > 4:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	627 raise Error, 'bad sample width'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	628 self._sampwidth = sampwidth
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	629
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	630 def getsampwidth(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	631 if not self._sampwidth:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	632 raise Error, 'sample width not set'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	633 return 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	634
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	635 def setframerate(self, framerate):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	636 if self._nframeswritten:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	637 raise Error, 'cannot change parameters after starting to write'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	638 if framerate <= 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	639 raise Error, 'bad frame rate'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	640 self._framerate = framerate
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	641
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	642 def getframerate(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	643 if not self._framerate:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	644 raise Error, 'frame rate not set'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	645 return 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	646
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	647 def setnframes(self, nframes):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	648 if self._nframeswritten:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	649 raise Error, 'cannot change parameters after starting to write'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	650 self._nframes = nframes
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	651
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	652 def getnframes(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	653 return self._nframeswritten
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	654
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	655 def setcomptype(self, comptype, compname):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	656 if self._nframeswritten:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	657 raise Error, 'cannot change parameters after starting to write'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	658 if comptype not in ('NONE', 'ULAW', 'ALAW', 'G722'):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	659 raise Error, 'unsupported compression type'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	660 self._comptype = comptype
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	661 self._compname = compname
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	662
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	663 def getcomptype(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	664 return self._comptype
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	665
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	666 def getcompname(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	667 return self._compname
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	668
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	669 ## def setversion(self, version):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	670 ## if self._nframeswritten:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	671 ## raise Error, 'cannot change parameters after starting to write'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	672 ## self._version = version
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	673
48179 df277e642e58 Remove tuple parameter unpacking in aifc to silence warnings under -3. Brett Cannon <bcannon@gmail.com> parents: 38494 diff changeset	674 def setparams(self, info):
df277e642e58 Remove tuple parameter unpacking in aifc to silence warnings under -3. Brett Cannon <bcannon@gmail.com> parents: 38494 diff changeset	675 nchannels, sampwidth, framerate, nframes, comptype, compname = info
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	676 if self._nframeswritten:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	677 raise Error, 'cannot change parameters after starting to write'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	678 if comptype not in ('NONE', 'ULAW', 'ALAW', 'G722'):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	679 raise Error, 'unsupported compression type'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	680 self.setnchannels(nchannels)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	681 self.setsampwidth(sampwidth)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	682 self.setframerate(framerate)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	683 self.setnframes(nframes)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	684 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	685
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	686 def getparams(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	687 if not self._nchannels or not self._sampwidth or not self._framerate:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	688 raise Error, 'not all parameters set'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	689 return self._nchannels, self._sampwidth, self._framerate, \
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	690 self._nframes, self._comptype, self._compname
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	691
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	692 def setmark(self, id, pos, name):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	693 if id <= 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	694 raise Error, 'marker ID must be > 0'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	695 if pos < 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	696 raise Error, 'marker position must be >= 0'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	697 if type(name) != type(''):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	698 raise Error, 'marker name must be a string'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	699 for i in range(len(self._markers)):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	700 if id == self._markers[i][0]:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	701 self._markers[i] = id, pos, name
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	702 return
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	703 self._markers.append((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	704
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	705 def getmark(self, id):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	706 for marker in self._markers:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	707 if id == marker[0]:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	708 return marker
31515 71a294bd7950 Replace backticks with repr() or "%r" Walter Dörwald <walter@livinglogic.de> parents: 24776 diff changeset	709 raise Error, 'marker %r does not exist' % (id,)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	710
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	711 def getmarkers(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	712 if len(self._markers) == 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	713 return None
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	714 return self._markers
15857 0a8da6f397b7 Whitespace standardization. Tim Peters <tim.peters@gmail.com> parents: 14022 diff changeset	715
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	716 def tell(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	717 return self._nframeswritten
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	718
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	719 def writeframesraw(self, data):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	720 self._ensure_header_written(len(data))
63639 4c0b37d869ca Merged revisions 75407,75409-75413,75415,75419-75421 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 53876 diff changeset	721 nframes = len(data) // (self._sampwidth * self._nchannels)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	722 if self._convert:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	723 data = self._convert(data)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	724 self._file.write(data)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	725 self._nframeswritten = self._nframeswritten + nframes
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	726 self._datawritten = self._datawritten + 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	727
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	728 def writeframes(self, data):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	729 self.writeframesraw(data)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	730 if self._nframeswritten != self._nframes or \
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	731 self._datalength != self._datawritten:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	732 self._patchheader()
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	733
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	734 def close(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	735 self._ensure_header_written(0)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	736 if self._datawritten & 1:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	737 # quick pad to even size
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	738 self._file.write(chr(0))
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	739 self._datawritten = self._datawritten + 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	740 self._writemarkers()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	741 if self._nframeswritten != self._nframes or \
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	742 self._datalength != self._datawritten or \
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	743 self._marklength:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	744 self._patchheader()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	745 if self._comp:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	746 self._comp.CloseCompressor()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	747 self._comp = None
53627 d682c9346848 prevent ref cycles by removing bound method on close() Benjamin Peterson <benjamin@python.org> parents: 53598 diff changeset	748 # Prevent ref cycles
d682c9346848 prevent ref cycles by removing bound method on close() Benjamin Peterson <benjamin@python.org> parents: 53598 diff changeset	749 self._convert = None
53876 7a3bd179b180 Merged revisions 72422,72425-72426 via svnmerge from R. David Murray <rdmurray@bitdance.com> parents: 53598 diff changeset	750 self._file.close()
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	751
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	752 #
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	753 # Internal methods.
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	754 #
1437 e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements. Sjoerd Mullender <sjoerd@acm.org> parents: 1436 diff changeset	755
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	756 def _comp_data(self, data):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	757 import cl
21916 15c0e7aef666 SF #515004 cleanup Neal Norwitz <nnorwitz@gmail.com> parents: 16070 diff changeset	758 dummy = self._comp.SetParam(cl.FRAME_BUFFER_SIZE, len(data))
15c0e7aef666 SF #515004 cleanup Neal Norwitz <nnorwitz@gmail.com> parents: 16070 diff changeset	759 dummy = self._comp.SetParam(cl.COMPRESSED_BUFFER_SIZE, len(data))
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	760 return self._comp.Compress(self._nframes, data)
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	761
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	762 def _lin2ulaw(self, data):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	763 import audioop
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	764 return audioop.lin2ulaw(data, 2)
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	765
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	766 def _lin2adpcm(self, data):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	767 import audioop
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	768 if not hasattr(self, '_adpcmstate'):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	769 self._adpcmstate = None
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	770 data, self._adpcmstate = audioop.lin2adpcm(data, 2,
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	771 self._adpcmstate)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	772 return data
1864 aaf1e05e6842 Added support for ADPCM compression. Sjoerd Mullender <sjoerd@acm.org> parents: 1746 diff changeset	773
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	774 def _ensure_header_written(self, datasize):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	775 if not self._nframeswritten:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	776 if self._comptype in ('ULAW', 'ALAW'):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	777 if not self._sampwidth:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	778 self._sampwidth = 2
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	779 if self._sampwidth != 2:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	780 raise Error, 'sample width must be 2 when compressing with ULAW or ALAW'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	781 if self._comptype == 'G722':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	782 if not self._sampwidth:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	783 self._sampwidth = 2
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	784 if self._sampwidth != 2:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	785 raise Error, 'sample width must be 2 when compressing with G7.22 (ADPCM)'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	786 if not self._nchannels:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	787 raise Error, '# channels not specified'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	788 if not self._sampwidth:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	789 raise Error, 'sample width not specified'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	790 if not self._framerate:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	791 raise Error, 'sampling rate not specified'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	792 self._write_header(datasize)
1314 918bee90f73e * calendar.py: minor cleanups Guido van Rossum <guido@python.org> parents: 1297 diff changeset	793
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	794 def _init_compression(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	795 if self._comptype == 'G722':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	796 self._convert = self._lin2adpcm
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	797 return
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	798 try:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	799 import cl
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	800 except ImportError:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	801 if self._comptype == 'ULAW':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	802 try:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	803 import audioop
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	804 self._convert = self._lin2ulaw
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	805 return
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	806 except ImportError:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	807 pass
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	808 raise Error, 'cannot write compressed AIFF-C files'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	809 if self._comptype == 'ULAW':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	810 scheme = cl.G711_ULAW
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	811 elif self._comptype == 'ALAW':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	812 scheme = cl.G711_ALAW
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	813 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	814 raise Error, 'unsupported compression type'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	815 self._comp = cl.OpenCompressor(scheme)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	816 params = [cl.ORIGINAL_FORMAT, 0,
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	817 cl.BITS_PER_COMPONENT, self._sampwidth * 8,
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	818 cl.FRAME_RATE, self._framerate,
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	819 cl.FRAME_BUFFER_SIZE, 100,
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	820 cl.COMPRESSED_BUFFER_SIZE, 100]
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	821 if self._nchannels == 1:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	822 params[1] = cl.MONO
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	823 elif self._nchannels == 2:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	824 params[1] = cl.STEREO_INTERLEAVED
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	825 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	826 raise Error, 'cannot compress more than 2 channels'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	827 self._comp.SetParams(params)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	828 # the compressor produces a header which we ignore
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	829 dummy = self._comp.Compress(0, '')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	830 self._convert = self._comp_data
1419 204001dddcc3 aifc.py: added missing tell() method in AIFC write class; Sjoerd Mullender <sjoerd@acm.org> parents: 1336 diff changeset	831
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	832 def _write_header(self, initlength):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	833 if self._aifc and self._comptype != 'NONE':
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	834 self._init_compression()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	835 self._file.write('FORM')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	836 if not self._nframes:
63639 4c0b37d869ca Merged revisions 75407,75409-75413,75415,75419-75421 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 53876 diff changeset	837 self._nframes = initlength // (self._nchannels * self._sampwidth)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	838 self._datalength = self._nframes * self._nchannels * self._sampwidth
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	839 if self._datalength & 1:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	840 self._datalength = self._datalength + 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	841 if self._aifc:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	842 if self._comptype in ('ULAW', 'ALAW'):
63639 4c0b37d869ca Merged revisions 75407,75409-75413,75415,75419-75421 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 53876 diff changeset	843 self._datalength = self._datalength // 2
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	844 if self._datalength & 1:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	845 self._datalength = self._datalength + 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	846 elif self._comptype == 'G722':
63639 4c0b37d869ca Merged revisions 75407,75409-75413,75415,75419-75421 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 53876 diff changeset	847 self._datalength = (self._datalength + 3) // 4
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	848 if self._datalength & 1:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	849 self._datalength = self._datalength + 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	850 self._form_length_pos = self._file.tell()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	851 commlength = self._write_form_length(self._datalength)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	852 if self._aifc:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	853 self._file.write('AIFC')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	854 self._file.write('FVER')
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	855 _write_ulong(self._file, 4)
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	856 _write_ulong(self._file, self._version)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	857 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	858 self._file.write('AIFF')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	859 self._file.write('COMM')
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	860 _write_ulong(self._file, commlength)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	861 _write_short(self._file, self._nchannels)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	862 self._nframes_pos = self._file.tell()
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	863 _write_ulong(self._file, self._nframes)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	864 _write_short(self._file, self._sampwidth * 8)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	865 _write_float(self._file, self._framerate)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	866 if self._aifc:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	867 self._file.write(self._comptype)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	868 _write_string(self._file, self._compname)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	869 self._file.write('SSND')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	870 self._ssnd_length_pos = self._file.tell()
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	871 _write_ulong(self._file, self._datalength + 8)
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	872 _write_ulong(self._file, 0)
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	873 _write_ulong(self._file, 0)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	874
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	875 def _write_form_length(self, datalength):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	876 if self._aifc:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	877 commlength = 18 + 5 + len(self._compname)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	878 if commlength & 1:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	879 commlength = commlength + 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	880 verslength = 12
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	881 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	882 commlength = 18
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	883 verslength = 0
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	884 _write_ulong(self._file, 4 + verslength + self._marklength + \
8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	885 8 + commlength + 16 + datalength)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	886 return commlength
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	887
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	888 def _patchheader(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	889 curpos = self._file.tell()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	890 if self._datawritten & 1:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	891 datalength = self._datawritten + 1
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	892 self._file.write(chr(0))
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	893 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	894 datalength = self._datawritten
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	895 if datalength == self._datalength and \
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	896 self._nframes == self._nframeswritten and \
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	897 self._marklength == 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	898 self._file.seek(curpos, 0)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	899 return
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	900 self._file.seek(self._form_length_pos, 0)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	901 dummy = self._write_form_length(datalength)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	902 self._file.seek(self._nframes_pos, 0)
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	903 _write_ulong(self._file, self._nframeswritten)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	904 self._file.seek(self._ssnd_length_pos, 0)
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	905 _write_ulong(self._file, datalength + 8)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	906 self._file.seek(curpos, 0)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	907 self._nframes = self._nframeswritten
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	908 self._datalength = datalength
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	909
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	910 def _writemarkers(self):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	911 if len(self._markers) == 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	912 return
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	913 self._file.write('MARK')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	914 length = 2
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	915 for marker in self._markers:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	916 id, pos, name = marker
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	917 length = length + len(name) + 1 + 6
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	918 if len(name) & 1 == 0:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	919 length = length + 1
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	920 _write_ulong(self._file, length)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	921 self._marklength = length + 8
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	922 _write_short(self._file, len(self._markers))
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	923 for marker in self._markers:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	924 id, pos, name = marker
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	925 _write_short(self._file, id)
74467 8fac90d0f4cd Issue #13589: Fix some serialization primitives in the aifc module. Antoine Pitrou <solipsis@pitrou.net> parents: 68256 diff changeset	926 _write_ulong(self._file, pos)
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	927 _write_string(self._file, name)
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	928
11034 b6a438cc195b Make the mode parameter to open() default in the same way as for wave.open(). Fred Drake <fdrake@acm.org> parents: 10937 diff changeset	929 def open(f, mode=None):
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	930 if mode is None:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	931 if hasattr(f, 'mode'):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	932 mode = f.mode
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	933 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	934 mode = 'rb'
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	935 if mode in ('r', 'rb'):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	936 return Aifc_read(f)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	937 elif mode in ('w', 'wb'):
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	938 return Aifc_write(f)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	939 else:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	940 raise Error, "mode must be 'r', 'rb', 'w', or 'wb'"
1192 78428243feaa New module aifc to read and write AIFF-C and AIFF files. See Sjoerd Mullender <sjoerd@acm.org> parents: diff changeset	941
1435 560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__() Guido van Rossum <guido@python.org> parents: 1423 diff changeset	942 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	943
0bdd31538d8f Rewrote _{read,write}_{short,long} to use the newly revamped struct Guido van Rossum <guido@python.org> parents: 4078 diff changeset	944 if __name__ == '__main__':
11691 e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	945 import sys
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	946 if not sys.argv[1:]:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	947 sys.argv.append('/usr/demos/data/audio/bach.aiff')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	948 fn = sys.argv[1]
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	949 f = open(fn, 'r')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	950 print "Reading", fn
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	951 print "nchannels =", f.getnchannels()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	952 print "nframes =", f.getnframes()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	953 print "sampwidth =", f.getsampwidth()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	954 print "framerate =", f.getframerate()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	955 print "comptype =", f.getcomptype()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	956 print "compname =", f.getcompname()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	957 if sys.argv[2:]:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	958 gn = sys.argv[2]
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	959 print "Writing", gn
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	960 g = open(gn, 'w')
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	961 g.setparams(f.getparams())
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	962 while 1:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	963 data = f.readframes(1024)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	964 if not data:
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	965 break
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	966 g.writeframes(data)
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	967 g.close()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	968 f.close()
e34991022571 Mass patch by Ka-Ping Yee: Guido van Rossum <guido@python.org> parents: 11227 diff changeset	969 print "Done."

Mercurial > cpython-lru_cache-weakref

annotate Lib/aifc.py @ 79675:c0a2294de787 2.7