2000-02-02 23:10:15 +08:00
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"""Stuff to parse AIFF-C and AIFF files.
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Unless explicitly stated otherwise, the description below is true
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both for AIFF-C files and AIFF files.
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An AIFF-C file has the following structure.
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+-----------------+
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| FORM |
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+-----------------+
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| <size> |
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+----+------------+
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| | AIFC |
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| +------------+
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| | <chunks> |
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| | . |
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| | . |
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+----+------------+
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An AIFF file has the string "AIFF" instead of "AIFC".
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A chunk consists of an identifier (4 bytes) followed by a size (4 bytes,
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big endian order), followed by the data. The size field does not include
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the size of the 8 byte header.
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The following chunk types are recognized.
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FVER
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<version number of AIFF-C defining document> (AIFF-C only).
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MARK
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<# of markers> (2 bytes)
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list of markers:
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<marker ID> (2 bytes, must be > 0)
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<position> (4 bytes)
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<marker name> ("pstring")
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COMM
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<# of channels> (2 bytes)
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<# of sound frames> (4 bytes)
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<size of the samples> (2 bytes)
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<sampling frequency> (10 bytes, IEEE 80-bit extended
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floating point)
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in AIFF-C files only:
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<compression type> (4 bytes)
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<human-readable version of compression type> ("pstring")
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SSND
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<offset> (4 bytes, not used by this program)
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<blocksize> (4 bytes, not used by this program)
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<sound data>
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A pstring consists of 1 byte length, a string of characters, and 0 or 1
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byte pad to make the total length even.
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Usage.
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Reading AIFF files:
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f = aifc.open(file, 'r')
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where file is either the name of a file or an open file pointer.
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The open file pointer must have methods read(), seek(), and close().
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In some types of audio files, if the setpos() method is not used,
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the seek() method is not necessary.
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This returns an instance of a class with the following public methods:
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getnchannels() -- returns number of audio channels (1 for
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mono, 2 for stereo)
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getsampwidth() -- returns sample width in bytes
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getframerate() -- returns sampling frequency
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getnframes() -- returns number of audio frames
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getcomptype() -- returns compression type ('NONE' for AIFF files)
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getcompname() -- returns human-readable version of
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compression type ('not compressed' for AIFF files)
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getparams() -- returns a tuple consisting of all of the
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above in the above order
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getmarkers() -- get the list of marks in the audio file or None
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if there are no marks
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getmark(id) -- get mark with the specified id (raises an error
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if the mark does not exist)
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readframes(n) -- returns at most n frames of audio
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rewind() -- rewind to the beginning of the audio stream
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setpos(pos) -- seek to the specified position
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tell() -- return the current position
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close() -- close the instance (make it unusable)
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The position returned by tell(), the position given to setpos() and
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the position of marks are all compatible and have nothing to do with
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the actual position in the file.
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2000-02-02 23:10:15 +08:00
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The close() method is called automatically when the class instance
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is destroyed.
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Writing AIFF files:
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f = aifc.open(file, 'w')
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where file is either the name of a file or an open file pointer.
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The open file pointer must have methods write(), tell(), seek(), and
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close().
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This returns an instance of a class with the following public methods:
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aiff() -- create an AIFF file (AIFF-C default)
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aifc() -- create an AIFF-C file
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setnchannels(n) -- set the number of channels
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setsampwidth(n) -- set the sample width
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setframerate(n) -- set the frame rate
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setnframes(n) -- set the number of frames
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setcomptype(type, name)
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-- set the compression type and the
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human-readable compression type
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setparams(tuple)
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-- set all parameters at once
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setmark(id, pos, name)
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-- add specified mark to the list of marks
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tell() -- return current position in output file (useful
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in combination with setmark())
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writeframesraw(data)
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-- write audio frames without pathing up the
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file header
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writeframes(data)
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-- write audio frames and patch up the file header
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close() -- patch up the file header and close the
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output file
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You should set the parameters before the first writeframesraw or
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writeframes. The total number of frames does not need to be set,
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but when it is set to the correct value, the header does not have to
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be patched up.
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It is best to first set all parameters, perhaps possibly the
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compression type, and then write audio frames using writeframesraw.
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When all frames have been written, either call writeframes('') or
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close() to patch up the sizes in the header.
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Marks can be added anytime. If there are any marks, ypu must call
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close() after all frames have been written.
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The close() method is called automatically when the class instance
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is destroyed.
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When a file is opened with the extension '.aiff', an AIFF file is
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written, otherwise an AIFF-C file is written. This default can be
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changed by calling aiff() or aifc() before the first writeframes or
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writeframesraw.
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"""
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1993-01-22 20:53:11 +08:00
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1996-12-31 13:57:34 +08:00
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import struct
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2007-12-02 17:40:06 +08:00
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import builtins
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1993-01-22 20:53:11 +08:00
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2008-06-08 03:01:03 +08:00
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__all__ = ["Error", "open", "openfp"]
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2001-01-21 03:54:20 +08:00
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2000-08-17 13:06:49 +08:00
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class Error(Exception):
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pass
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1993-01-22 20:53:11 +08:00
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2007-01-16 00:59:06 +08:00
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_AIFC_version = 0xA2805140 # Version 1 of AIFF-C
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1993-01-22 20:53:11 +08:00
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def _read_long(file):
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try:
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return struct.unpack('>l', file.read(4))[0]
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except struct.error:
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raise EOFError
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1993-01-22 20:53:11 +08:00
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def _read_ulong(file):
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try:
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return struct.unpack('>L', file.read(4))[0]
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except struct.error:
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raise EOFError
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1993-01-22 20:53:11 +08:00
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def _read_short(file):
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2000-02-02 23:10:15 +08:00
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try:
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return struct.unpack('>h', file.read(2))[0]
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except struct.error:
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raise EOFError
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1993-01-22 20:53:11 +08:00
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2012-01-18 00:13:04 +08:00
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def _read_ushort(file):
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try:
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return struct.unpack('>H', file.read(2))[0]
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except struct.error:
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raise EOFError
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1993-01-22 20:53:11 +08:00
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def _read_string(file):
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2000-02-02 23:10:15 +08:00
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length = ord(file.read(1))
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if length == 0:
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2008-06-08 03:01:03 +08:00
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data = b''
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2000-02-02 23:10:15 +08:00
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else:
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data = file.read(length)
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if length & 1 == 0:
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dummy = file.read(1)
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return data
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1993-01-22 20:53:11 +08:00
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_HUGE_VAL = 1.79769313486231e+308 # See <limits.h>
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def _read_float(f): # 10 bytes
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2000-02-02 23:10:15 +08:00
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expon = _read_short(f) # 2 bytes
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sign = 1
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if expon < 0:
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sign = -1
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expon = expon + 0x8000
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himant = _read_ulong(f) # 4 bytes
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lomant = _read_ulong(f) # 4 bytes
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if expon == himant == lomant == 0:
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f = 0.0
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elif expon == 0x7FFF:
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f = _HUGE_VAL
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else:
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expon = expon - 16383
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2007-01-16 00:59:06 +08:00
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f = (himant * 0x100000000 + lomant) * pow(2.0, expon - 63)
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2000-02-02 23:10:15 +08:00
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return sign * f
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1993-01-22 20:53:11 +08:00
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def _write_short(f, x):
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2000-02-02 23:10:15 +08:00
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f.write(struct.pack('>h', x))
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1993-01-22 20:53:11 +08:00
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2012-01-18 00:13:04 +08:00
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def _write_ushort(f, x):
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f.write(struct.pack('>H', x))
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1993-01-22 20:53:11 +08:00
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def _write_long(f, x):
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2012-01-18 00:13:04 +08:00
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f.write(struct.pack('>l', x))
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def _write_ulong(f, x):
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2000-02-02 23:10:15 +08:00
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f.write(struct.pack('>L', x))
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1993-01-22 20:53:11 +08:00
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def _write_string(f, s):
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Partially merge trunk into p3yk. The removal of Mac/Tools is confusing svn
merge in bad ways, so I'll have to merge that extra-carefully (probably manually.)
Merged revisions 46495-46605 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
........
r46495 | tim.peters | 2006-05-28 03:52:38 +0200 (Sun, 28 May 2006) | 2 lines
Added missing svn:eol-style property to text files.
........
r46497 | tim.peters | 2006-05-28 12:41:29 +0200 (Sun, 28 May 2006) | 3 lines
PyErr_Display(), PyErr_WriteUnraisable(): Coverity found a cut-and-paste
bug in both: `className` was referenced before being checked for NULL.
........
r46499 | fredrik.lundh | 2006-05-28 14:06:46 +0200 (Sun, 28 May 2006) | 5 lines
needforspeed: added Py_MEMCPY macro (currently tuned for Visual C only),
and use it for string copy operations. this gives a 20% speedup on some
string benchmarks.
........
r46501 | michael.hudson | 2006-05-28 17:51:40 +0200 (Sun, 28 May 2006) | 26 lines
Quality control, meet exceptions.c.
Fix a number of problems with the need for speed code:
One is doing this sort of thing:
Py_DECREF(self->field);
self->field = newval;
Py_INCREF(self->field);
without being very sure that self->field doesn't start with a
value that has a __del__, because that almost certainly can lead
to segfaults.
As self->args is constrained to be an exact tuple we may as well
exploit this fact consistently. This leads to quite a lot of
simplification (and, hey, probably better performance).
Add some error checking in places lacking it.
Fix some rather strange indentation in the Unicode code.
Delete some trailing whitespace.
More to come, I haven't fixed all the reference leaks yet...
........
r46502 | george.yoshida | 2006-05-28 18:39:09 +0200 (Sun, 28 May 2006) | 3 lines
Patch #1080727: add "encoding" parameter to doctest.DocFileSuite
Contributed by Bjorn Tillenius.
........
r46503 | martin.v.loewis | 2006-05-28 18:57:38 +0200 (Sun, 28 May 2006) | 4 lines
Rest of patch #1490384: Commit icon source, remove
claim that Erik von Blokland is the author of the
installer picture.
........
r46504 | michael.hudson | 2006-05-28 19:40:29 +0200 (Sun, 28 May 2006) | 16 lines
Quality control, meet exceptions.c, round two.
Make some functions that should have been static static.
Fix a bunch of refleaks by fixing the definition of
MiddlingExtendsException.
Remove all the __new__ implementations apart from
BaseException_new. Rewrite most code that needs it to cope with
NULL fields (such code could get excercised anyway, the
__new__-removal just makes it more likely). This involved
editing the code for WindowsError, which I can't test.
This fixes all the refleaks in at least the start of a regrtest
-R :: run.
........
r46505 | marc-andre.lemburg | 2006-05-28 19:46:58 +0200 (Sun, 28 May 2006) | 10 lines
Initial version of systimes - a module to provide platform dependent
performance measurements.
The module is currently just a proof-of-concept implementation, but
will integrated into pybench once it is stable enough.
License: pybench license.
Author: Marc-Andre Lemburg.
........
r46507 | armin.rigo | 2006-05-28 21:13:17 +0200 (Sun, 28 May 2006) | 15 lines
("Forward-port" of r46506)
Remove various dependencies on dictionary order in the standard library
tests, and one (clearly an oversight, potentially critical) in the
standard library itself - base64.py.
Remaining open issues:
* test_extcall is an output test, messy to make robust
* tarfile.py has a potential bug here, but I'm not familiar
enough with this code. Filed in as SF bug #1496501.
* urllib2.HTTPPasswordMgr() returns a random result if there is more
than one matching root path. I'm asking python-dev for
clarification...
........
r46508 | georg.brandl | 2006-05-28 22:11:45 +0200 (Sun, 28 May 2006) | 4 lines
The empty string is a valid import path.
(fixes #1496539)
........
r46509 | georg.brandl | 2006-05-28 22:23:12 +0200 (Sun, 28 May 2006) | 3 lines
Patch #1496206: urllib2 PasswordMgr ./. default ports
........
r46510 | georg.brandl | 2006-05-28 22:57:09 +0200 (Sun, 28 May 2006) | 3 lines
Fix refleaks in UnicodeError get and set methods.
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r46511 | michael.hudson | 2006-05-28 23:19:03 +0200 (Sun, 28 May 2006) | 3 lines
use the UnicodeError traversal and clearing functions in UnicodeError
subclasses.
........
r46512 | thomas.wouters | 2006-05-28 23:32:12 +0200 (Sun, 28 May 2006) | 4 lines
Make last patch valid C89 so Windows compilers can deal with it.
........
r46513 | georg.brandl | 2006-05-28 23:42:54 +0200 (Sun, 28 May 2006) | 3 lines
Fix ref-antileak in _struct.c which eventually lead to deallocating None.
........
r46514 | georg.brandl | 2006-05-28 23:57:35 +0200 (Sun, 28 May 2006) | 4 lines
Correct None refcount issue in Mac modules. (Are they
still used?)
........
r46515 | armin.rigo | 2006-05-29 00:07:08 +0200 (Mon, 29 May 2006) | 3 lines
A clearer error message when passing -R to regrtest.py with
release builds of Python.
........
r46516 | georg.brandl | 2006-05-29 00:14:04 +0200 (Mon, 29 May 2006) | 3 lines
Fix C function calling conventions in _sre module.
........
r46517 | georg.brandl | 2006-05-29 00:34:51 +0200 (Mon, 29 May 2006) | 3 lines
Convert audioop over to METH_VARARGS.
........
r46518 | georg.brandl | 2006-05-29 00:38:57 +0200 (Mon, 29 May 2006) | 3 lines
METH_NOARGS functions do get called with two args.
........
r46519 | georg.brandl | 2006-05-29 11:46:51 +0200 (Mon, 29 May 2006) | 4 lines
Fix refleak in socketmodule. Replace bogus Py_BuildValue calls.
Fix refleak in exceptions.
........
r46520 | nick.coghlan | 2006-05-29 14:43:05 +0200 (Mon, 29 May 2006) | 7 lines
Apply modified version of Collin Winter's patch #1478788
Renames functional extension module to _functools and adds a Python
functools module so that utility functions like update_wrapper can be
added easily.
........
r46522 | georg.brandl | 2006-05-29 15:53:16 +0200 (Mon, 29 May 2006) | 3 lines
Convert fmmodule to METH_VARARGS.
........
r46523 | georg.brandl | 2006-05-29 16:13:21 +0200 (Mon, 29 May 2006) | 3 lines
Fix #1494605.
........
r46524 | georg.brandl | 2006-05-29 16:28:05 +0200 (Mon, 29 May 2006) | 3 lines
Handle PyMem_Malloc failure in pystrtod.c. Closes #1494671.
........
r46525 | georg.brandl | 2006-05-29 16:33:55 +0200 (Mon, 29 May 2006) | 3 lines
Fix compiler warning.
........
r46526 | georg.brandl | 2006-05-29 16:39:00 +0200 (Mon, 29 May 2006) | 3 lines
Fix #1494787 (pyclbr counts whitespace as superclass name)
........
r46527 | bob.ippolito | 2006-05-29 17:47:29 +0200 (Mon, 29 May 2006) | 1 line
simplify the struct code a bit (no functional changes)
........
r46528 | armin.rigo | 2006-05-29 19:59:47 +0200 (Mon, 29 May 2006) | 2 lines
Silence a warning.
........
r46529 | georg.brandl | 2006-05-29 21:39:45 +0200 (Mon, 29 May 2006) | 3 lines
Correct some value converting strangenesses.
........
r46530 | nick.coghlan | 2006-05-29 22:27:44 +0200 (Mon, 29 May 2006) | 1 line
When adding a module like functools, it helps to let SVN know about the file.
........
r46531 | georg.brandl | 2006-05-29 22:52:54 +0200 (Mon, 29 May 2006) | 4 lines
Patches #1497027 and #972322: try HTTP digest auth first,
and watch out for handler name collisions.
........
r46532 | georg.brandl | 2006-05-29 22:57:01 +0200 (Mon, 29 May 2006) | 3 lines
Add News entry for last commit.
........
r46533 | georg.brandl | 2006-05-29 23:04:52 +0200 (Mon, 29 May 2006) | 4 lines
Make use of METH_O and METH_NOARGS where possible.
Use Py_UnpackTuple instead of PyArg_ParseTuple where possible.
........
r46534 | georg.brandl | 2006-05-29 23:58:42 +0200 (Mon, 29 May 2006) | 3 lines
Convert more modules to METH_VARARGS.
........
r46535 | georg.brandl | 2006-05-30 00:00:30 +0200 (Tue, 30 May 2006) | 3 lines
Whoops.
........
r46536 | fredrik.lundh | 2006-05-30 00:42:07 +0200 (Tue, 30 May 2006) | 4 lines
fixed "abc".count("", 100) == -96 error (hopefully, nobody's relying on
the current behaviour ;-)
........
r46537 | bob.ippolito | 2006-05-30 00:55:48 +0200 (Tue, 30 May 2006) | 1 line
struct: modulo math plus warning on all endian-explicit formats for compatibility with older struct usage (ugly)
........
r46539 | bob.ippolito | 2006-05-30 02:26:01 +0200 (Tue, 30 May 2006) | 1 line
Add a length check to aifc to ensure it doesn't write a bogus file
........
r46540 | tim.peters | 2006-05-30 04:25:25 +0200 (Tue, 30 May 2006) | 10 lines
deprecated_err(): Stop bizarre warning messages when the tests
are run in the order:
test_genexps (or any other doctest-based test)
test_struct
test_doctest
The `warnings` module needs an advertised way to save/restore
its internal filter list.
........
r46541 | tim.peters | 2006-05-30 04:26:46 +0200 (Tue, 30 May 2006) | 2 lines
Whitespace normalization.
........
r46542 | tim.peters | 2006-05-30 04:30:30 +0200 (Tue, 30 May 2006) | 2 lines
Set a binary svn:mime-type property on this UTF-8 encoded file.
........
r46543 | neal.norwitz | 2006-05-30 05:18:50 +0200 (Tue, 30 May 2006) | 1 line
Simplify further by using AddStringConstant
........
r46544 | tim.peters | 2006-05-30 06:16:25 +0200 (Tue, 30 May 2006) | 6 lines
Convert relevant dict internals to Py_ssize_t.
I don't have a box with nearly enough RAM, or an OS,
that could get close to tickling this, though (requires
a dict w/ at least 2**31 entries).
........
r46545 | neal.norwitz | 2006-05-30 06:19:21 +0200 (Tue, 30 May 2006) | 1 line
Remove stray | in comment
........
r46546 | neal.norwitz | 2006-05-30 06:25:05 +0200 (Tue, 30 May 2006) | 1 line
Use Py_SAFE_DOWNCAST for safety. Fix format strings. Remove 2 more stray | in comment
........
r46547 | neal.norwitz | 2006-05-30 06:43:23 +0200 (Tue, 30 May 2006) | 1 line
No DOWNCAST is required since sizeof(Py_ssize_t) >= sizeof(int) and Py_ReprEntr returns an int
........
r46548 | tim.peters | 2006-05-30 07:04:59 +0200 (Tue, 30 May 2006) | 3 lines
dict_print(): Explicitly narrow the return value
from a (possibly) wider variable.
........
r46549 | tim.peters | 2006-05-30 07:23:59 +0200 (Tue, 30 May 2006) | 5 lines
dict_print(): So that Neal & I don't spend the rest of
our lives taking turns rewriting code that works ;-),
get rid of casting illusions by declaring a new variable
with the obvious type.
........
r46550 | georg.brandl | 2006-05-30 09:04:55 +0200 (Tue, 30 May 2006) | 3 lines
Restore exception pickle support. #1497319.
........
r46551 | georg.brandl | 2006-05-30 09:13:29 +0200 (Tue, 30 May 2006) | 3 lines
Add a test case for exception pickling. args is never NULL.
........
r46552 | neal.norwitz | 2006-05-30 09:21:10 +0200 (Tue, 30 May 2006) | 1 line
Don't fail if the (sub)pkgname already exist.
........
r46553 | georg.brandl | 2006-05-30 09:34:45 +0200 (Tue, 30 May 2006) | 3 lines
Disallow keyword args for exceptions.
........
r46554 | neal.norwitz | 2006-05-30 09:36:54 +0200 (Tue, 30 May 2006) | 5 lines
I'm impatient. I think this will fix a few more problems with the buildbots.
I'm not sure this is the best approach, but I can't think of anything better.
If this creates problems, feel free to revert, but I think it's safe and
should make things a little better.
........
r46555 | georg.brandl | 2006-05-30 10:17:00 +0200 (Tue, 30 May 2006) | 4 lines
Do the check for no keyword arguments in __init__ so that
subclasses of Exception can be supplied keyword args
........
r46556 | georg.brandl | 2006-05-30 10:47:19 +0200 (Tue, 30 May 2006) | 3 lines
Convert test_exceptions to unittest.
........
r46557 | andrew.kuchling | 2006-05-30 14:52:01 +0200 (Tue, 30 May 2006) | 1 line
Add SoC name, and reorganize this section a bit
........
r46559 | tim.peters | 2006-05-30 17:53:34 +0200 (Tue, 30 May 2006) | 11 lines
PyLong_FromString(): Continued fraction analysis (explained in
a new comment) suggests there are almost certainly large input
integers in all non-binary input bases for which one Python digit
too few is initally allocated to hold the final result. Instead
of assert-failing when that happens, allocate more space. Alas,
I estimate it would take a few days to find a specific such case,
so this isn't backed up by a new test (not to mention that such
a case may take hours to run, since conversion time is quadratic
in the number of digits, and preliminary attempts suggested that
the smallest such inputs contain at least a million digits).
........
r46560 | fredrik.lundh | 2006-05-30 19:11:48 +0200 (Tue, 30 May 2006) | 3 lines
changed find/rfind to return -1 for matches outside the source string
........
r46561 | bob.ippolito | 2006-05-30 19:37:54 +0200 (Tue, 30 May 2006) | 1 line
Change wrapping terminology to overflow masking
........
r46562 | fredrik.lundh | 2006-05-30 19:39:58 +0200 (Tue, 30 May 2006) | 3 lines
changed count to return 0 for slices outside the source string
........
r46568 | tim.peters | 2006-05-31 01:28:02 +0200 (Wed, 31 May 2006) | 2 lines
Whitespace normalization.
........
r46569 | brett.cannon | 2006-05-31 04:19:54 +0200 (Wed, 31 May 2006) | 5 lines
Clarify wording on default values for strptime(); defaults are used when better
values cannot be inferred.
Closes bug #1496315.
........
r46572 | neal.norwitz | 2006-05-31 09:43:27 +0200 (Wed, 31 May 2006) | 1 line
Calculate smallest properly (it was off by one) and use proper ssize_t types for Win64
........
r46573 | neal.norwitz | 2006-05-31 10:01:08 +0200 (Wed, 31 May 2006) | 1 line
Revert last checkin, it is better to do make distclean
........
r46574 | neal.norwitz | 2006-05-31 11:02:44 +0200 (Wed, 31 May 2006) | 3 lines
On 64-bit platforms running test_struct after test_tarfile would fail
since the deprecation warning wouldn't be raised.
........
r46575 | thomas.heller | 2006-05-31 13:37:58 +0200 (Wed, 31 May 2006) | 3 lines
PyTuple_Pack is not available in Python 2.3, but ctypes must stay
compatible with that.
........
r46576 | andrew.kuchling | 2006-05-31 15:18:56 +0200 (Wed, 31 May 2006) | 1 line
'functional' module was renamed to 'functools'
........
r46577 | kristjan.jonsson | 2006-05-31 15:35:41 +0200 (Wed, 31 May 2006) | 1 line
Fixup the PCBuild8 project directory. exceptions.c have moved to Objects, and the functionalmodule.c has been replaced with _functoolsmodule.c. Other minor changes to .vcproj files and .sln to fix compilation
........
r46578 | andrew.kuchling | 2006-05-31 16:08:48 +0200 (Wed, 31 May 2006) | 15 lines
[Bug #1473048]
SimpleXMLRPCServer and DocXMLRPCServer don't look at
the path of the HTTP request at all; you can POST or
GET from / or /RPC2 or /blahblahblah with the same results.
Security scanners that look for /cgi-bin/phf will therefore report
lots of vulnerabilities.
Fix: add a .rpc_paths attribute to the SimpleXMLRPCServer class,
and report a 404 error if the path isn't on the allowed list.
Possibly-controversial aspect of this change: the default makes only
'/' and '/RPC2' legal. Maybe this will break people's applications
(though I doubt it). We could just set the default to an empty tuple,
which would exactly match the current behaviour.
........
r46579 | andrew.kuchling | 2006-05-31 16:12:47 +0200 (Wed, 31 May 2006) | 1 line
Mention SimpleXMLRPCServer change
........
r46580 | tim.peters | 2006-05-31 16:28:07 +0200 (Wed, 31 May 2006) | 2 lines
Trimmed trailing whitespace.
........
r46581 | tim.peters | 2006-05-31 17:33:22 +0200 (Wed, 31 May 2006) | 4 lines
_range_error(): Speed and simplify (there's no real need for
loops here). Assert that size_t is actually big enough, and
that f->size is at least one. Wrap a long line.
........
r46582 | tim.peters | 2006-05-31 17:34:37 +0200 (Wed, 31 May 2006) | 2 lines
Repaired error in new comment.
........
r46584 | neal.norwitz | 2006-06-01 07:32:49 +0200 (Thu, 01 Jun 2006) | 4 lines
Remove ; at end of macro. There was a compiler recently that warned
about extra semi-colons. It may have been the HP C compiler.
This file will trigger a bunch of those warnings now.
........
r46585 | georg.brandl | 2006-06-01 08:39:19 +0200 (Thu, 01 Jun 2006) | 3 lines
Correctly unpickle 2.4 exceptions via __setstate__ (patch #1498571)
........
r46586 | georg.brandl | 2006-06-01 10:27:32 +0200 (Thu, 01 Jun 2006) | 3 lines
Correctly allocate complex types with tp_alloc. (bug #1498638)
........
r46587 | georg.brandl | 2006-06-01 14:30:46 +0200 (Thu, 01 Jun 2006) | 2 lines
Correctly dispatch Faults in loads (patch #1498627)
........
r46588 | georg.brandl | 2006-06-01 15:00:49 +0200 (Thu, 01 Jun 2006) | 3 lines
Some code style tweaks, and remove apply.
........
r46589 | armin.rigo | 2006-06-01 15:19:12 +0200 (Thu, 01 Jun 2006) | 5 lines
[ 1497053 ] Let dicts propagate the exceptions in user __eq__().
[ 1456209 ] dictresize() vulnerability ( <- backport candidate ).
........
r46590 | tim.peters | 2006-06-01 15:41:46 +0200 (Thu, 01 Jun 2006) | 2 lines
Whitespace normalization.
........
r46591 | tim.peters | 2006-06-01 15:49:23 +0200 (Thu, 01 Jun 2006) | 2 lines
Record bugs 1275608 and 1456209 as being fixed.
........
r46592 | tim.peters | 2006-06-01 15:56:26 +0200 (Thu, 01 Jun 2006) | 5 lines
Re-enable a new empty-string test added during the NFS sprint,
but disabled then because str and unicode strings gave different
results. The implementations were repaired later during the
sprint, but the new test remained disabled.
........
r46594 | tim.peters | 2006-06-01 17:50:44 +0200 (Thu, 01 Jun 2006) | 7 lines
Armin committed his patch while I was reviewing it (I'm sure
he didn't know this), so merged in some changes I made during
review. Nothing material apart from changing a new `mask` local
from int to Py_ssize_t. Mostly this is repairing comments that
were made incorrect, and adding new comments. Also a few
minor code rewrites for clarity or helpful succinctness.
........
r46599 | neal.norwitz | 2006-06-02 06:45:53 +0200 (Fri, 02 Jun 2006) | 1 line
Convert docstrings to comments so regrtest -v prints method names
........
r46600 | neal.norwitz | 2006-06-02 06:50:49 +0200 (Fri, 02 Jun 2006) | 2 lines
Fix memory leak found by valgrind.
........
r46601 | neal.norwitz | 2006-06-02 06:54:52 +0200 (Fri, 02 Jun 2006) | 1 line
More memory leaks from valgrind
........
r46602 | neal.norwitz | 2006-06-02 08:23:00 +0200 (Fri, 02 Jun 2006) | 11 lines
Patch #1357836:
Prevent an invalid memory read from test_coding in case the done flag is set.
In that case, the loop isn't entered. I wonder if rather than setting
the done flag in the cases before the loop, if they should just exit early.
This code looks like it should be refactored.
Backport candidate (also the early break above if decoding_fgets fails)
........
r46603 | martin.blais | 2006-06-02 15:03:43 +0200 (Fri, 02 Jun 2006) | 1 line
Fixed struct test to not use unittest.
........
r46605 | tim.peters | 2006-06-03 01:22:51 +0200 (Sat, 03 Jun 2006) | 10 lines
pprint functions used to sort a dict (by key) if and only if
the output required more than one line. "Small" dicts got
displayed in seemingly random order (the hash-induced order
produced by dict.__repr__). None of this was documented.
Now pprint functions always sort dicts by key, and the docs
promise it.
This was proposed and agreed to during the PyCon 2006 core
sprint -- I just didn't have time for it before now.
........
2006-06-08 22:42:34 +08:00
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if len(s) > 255:
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raise ValueError("string exceeds maximum pstring length")
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2012-01-18 00:13:04 +08:00
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f.write(struct.pack('B', len(s)))
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2000-02-02 23:10:15 +08:00
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f.write(s)
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if len(s) & 1 == 0:
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2008-06-08 03:01:03 +08:00
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f.write(b'\x00')
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1993-01-22 20:53:11 +08:00
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def _write_float(f, x):
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2000-02-02 23:10:15 +08:00
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import math
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if x < 0:
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sign = 0x8000
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x = x * -1
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else:
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sign = 0
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if x == 0:
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expon = 0
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himant = 0
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lomant = 0
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else:
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fmant, expon = math.frexp(x)
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2012-01-18 00:13:04 +08:00
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if expon > 16384 or fmant >= 1 or fmant != fmant: # Infinity or NaN
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2000-02-02 23:10:15 +08:00
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expon = sign|0x7FFF
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himant = 0
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lomant = 0
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else: # Finite
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expon = expon + 16382
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if expon < 0: # denormalized
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fmant = math.ldexp(fmant, expon)
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expon = 0
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expon = expon | sign
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fmant = math.ldexp(fmant, 32)
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fsmant = math.floor(fmant)
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2007-01-16 00:59:06 +08:00
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himant = int(fsmant)
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2000-02-02 23:10:15 +08:00
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fmant = math.ldexp(fmant - fsmant, 32)
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fsmant = math.floor(fmant)
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2007-01-16 00:59:06 +08:00
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lomant = int(fsmant)
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2012-01-18 00:13:04 +08:00
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_write_ushort(f, expon)
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_write_ulong(f, himant)
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_write_ulong(f, lomant)
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1993-01-22 20:53:11 +08:00
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1999-06-09 21:32:28 +08:00
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from chunk import Chunk
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1993-01-22 20:53:11 +08:00
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1993-05-24 22:16:22 +08:00
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class Aifc_read:
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2000-02-02 23:10:15 +08:00
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# Variables used in this class:
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#
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# These variables are available to the user though appropriate
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# methods of this class:
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# _file -- the open file with methods read(), close(), and seek()
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# set through the __init__() method
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# _nchannels -- the number of audio channels
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# available through the getnchannels() method
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# _nframes -- the number of audio frames
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# available through the getnframes() method
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# _sampwidth -- the number of bytes per audio sample
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# available through the getsampwidth() method
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# _framerate -- the sampling frequency
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# available through the getframerate() method
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# _comptype -- the AIFF-C compression type ('NONE' if AIFF)
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# available through the getcomptype() method
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# _compname -- the human-readable AIFF-C compression type
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# available through the getcomptype() method
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# _markers -- the marks in the audio file
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# available through the getmarkers() and getmark()
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# methods
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# _soundpos -- the position in the audio stream
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# available through the tell() method, set through the
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# setpos() method
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#
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# These variables are used internally only:
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# _version -- the AIFF-C version number
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# _decomp -- the decompressor from builtin module cl
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# _comm_chunk_read -- 1 iff the COMM chunk has been read
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# _aifc -- 1 iff reading an AIFF-C file
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# _ssnd_seek_needed -- 1 iff positioned correctly in audio
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# file for readframes()
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# _ssnd_chunk -- instantiation of a chunk class for the SSND chunk
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# _framesize -- size of one frame in the file
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def initfp(self, file):
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self._version = 0
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self._convert = None
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self._markers = []
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self._soundpos = 0
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2009-05-08 02:24:38 +08:00
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self._file = file
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chunk = Chunk(file)
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if chunk.getname() != b'FORM':
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2007-08-30 09:19:48 +08:00
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raise Error('file does not start with FORM id')
|
2009-05-08 02:24:38 +08:00
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formdata = chunk.read(4)
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2008-06-08 03:01:03 +08:00
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if formdata == b'AIFF':
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2000-02-02 23:10:15 +08:00
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self._aifc = 0
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2008-06-08 03:01:03 +08:00
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elif formdata == b'AIFC':
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2000-02-02 23:10:15 +08:00
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self._aifc = 1
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else:
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2007-08-30 09:19:48 +08:00
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raise Error('not an AIFF or AIFF-C file')
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2000-02-02 23:10:15 +08:00
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self._comm_chunk_read = 0
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while 1:
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self._ssnd_seek_needed = 1
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try:
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chunk = Chunk(self._file)
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except EOFError:
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break
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chunkname = chunk.getname()
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2008-06-08 03:01:03 +08:00
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if chunkname == b'COMM':
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2000-02-02 23:10:15 +08:00
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self._read_comm_chunk(chunk)
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self._comm_chunk_read = 1
|
2008-06-08 03:01:03 +08:00
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elif chunkname == b'SSND':
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2000-02-02 23:10:15 +08:00
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self._ssnd_chunk = chunk
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dummy = chunk.read(8)
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self._ssnd_seek_needed = 0
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2008-06-08 03:01:03 +08:00
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elif chunkname == b'FVER':
|
2002-08-13 06:11:28 +08:00
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self._version = _read_ulong(chunk)
|
2008-06-08 03:01:03 +08:00
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elif chunkname == b'MARK':
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2000-02-02 23:10:15 +08:00
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self._readmark(chunk)
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chunk.skip()
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if not self._comm_chunk_read or not self._ssnd_chunk:
|
2007-08-30 09:19:48 +08:00
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raise Error('COMM chunk and/or SSND chunk missing')
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2000-02-02 23:10:15 +08:00
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def __init__(self, f):
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2008-06-08 03:01:03 +08:00
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if isinstance(f, str):
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2007-12-02 17:40:06 +08:00
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f = builtins.open(f, 'rb')
|
2000-02-02 23:10:15 +08:00
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# else, assume it is an open file object already
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self.initfp(f)
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#
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# User visible methods.
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#
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def getfp(self):
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return self._file
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def rewind(self):
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self._ssnd_seek_needed = 1
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self._soundpos = 0
|
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def close(self):
|
2009-05-07 19:53:38 +08:00
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self._file.close()
|
2000-02-02 23:10:15 +08:00
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def tell(self):
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return self._soundpos
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def getnchannels(self):
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return self._nchannels
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def getnframes(self):
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return self._nframes
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def getsampwidth(self):
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return self._sampwidth
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def getframerate(self):
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return self._framerate
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|
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def getcomptype(self):
|
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return self._comptype
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|
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|
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def getcompname(self):
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return self._compname
|
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## def getversion(self):
|
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## return self._version
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def getparams(self):
|
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return self.getnchannels(), self.getsampwidth(), \
|
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self.getframerate(), self.getnframes(), \
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self.getcomptype(), self.getcompname()
|
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def getmarkers(self):
|
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if len(self._markers) == 0:
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return None
|
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|
return self._markers
|
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def getmark(self, id):
|
|
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|
for marker in self._markers:
|
|
|
|
if id == marker[0]:
|
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|
return marker
|
2008-06-08 03:01:03 +08:00
|
|
|
raise Error('marker {0!r} does not exist'.format(id))
|
2000-02-02 23:10:15 +08:00
|
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|
|
|
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|
def setpos(self, pos):
|
|
|
|
if pos < 0 or pos > self._nframes:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('position not in range')
|
2000-02-02 23:10:15 +08:00
|
|
|
self._soundpos = pos
|
|
|
|
self._ssnd_seek_needed = 1
|
|
|
|
|
|
|
|
def readframes(self, nframes):
|
|
|
|
if self._ssnd_seek_needed:
|
|
|
|
self._ssnd_chunk.seek(0)
|
|
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|
dummy = self._ssnd_chunk.read(8)
|
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|
pos = self._soundpos * self._framesize
|
|
|
|
if pos:
|
2000-03-07 23:19:31 +08:00
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|
self._ssnd_chunk.seek(pos + 8)
|
2000-02-02 23:10:15 +08:00
|
|
|
self._ssnd_seek_needed = 0
|
|
|
|
if nframes == 0:
|
2008-06-08 03:01:03 +08:00
|
|
|
return b''
|
2000-02-02 23:10:15 +08:00
|
|
|
data = self._ssnd_chunk.read(nframes * self._framesize)
|
|
|
|
if self._convert and data:
|
|
|
|
data = self._convert(data)
|
2008-06-08 03:01:03 +08:00
|
|
|
self._soundpos = self._soundpos + len(data) // (self._nchannels
|
|
|
|
* self._sampwidth)
|
2000-02-02 23:10:15 +08:00
|
|
|
return data
|
|
|
|
|
|
|
|
#
|
|
|
|
# Internal methods.
|
|
|
|
#
|
|
|
|
|
2008-06-08 03:01:03 +08:00
|
|
|
def _alaw2lin(self, data):
|
|
|
|
import audioop
|
|
|
|
return audioop.alaw2lin(data, 2)
|
2000-02-02 23:10:15 +08:00
|
|
|
|
|
|
|
def _ulaw2lin(self, data):
|
|
|
|
import audioop
|
|
|
|
return audioop.ulaw2lin(data, 2)
|
|
|
|
|
|
|
|
def _adpcm2lin(self, data):
|
|
|
|
import audioop
|
|
|
|
if not hasattr(self, '_adpcmstate'):
|
|
|
|
# first time
|
|
|
|
self._adpcmstate = None
|
2008-06-08 03:01:03 +08:00
|
|
|
data, self._adpcmstate = audioop.adpcm2lin(data, 2, self._adpcmstate)
|
2000-02-02 23:10:15 +08:00
|
|
|
return data
|
|
|
|
|
|
|
|
def _read_comm_chunk(self, chunk):
|
|
|
|
self._nchannels = _read_short(chunk)
|
|
|
|
self._nframes = _read_long(chunk)
|
2008-06-08 03:01:03 +08:00
|
|
|
self._sampwidth = (_read_short(chunk) + 7) // 8
|
2000-02-02 23:10:15 +08:00
|
|
|
self._framerate = int(_read_float(chunk))
|
|
|
|
self._framesize = self._nchannels * self._sampwidth
|
|
|
|
if self._aifc:
|
|
|
|
#DEBUG: SGI's soundeditor produces a bad size :-(
|
|
|
|
kludge = 0
|
|
|
|
if chunk.chunksize == 18:
|
|
|
|
kludge = 1
|
2007-02-09 13:37:30 +08:00
|
|
|
print('Warning: bad COMM chunk size')
|
2000-02-02 23:10:15 +08:00
|
|
|
chunk.chunksize = 23
|
|
|
|
#DEBUG end
|
|
|
|
self._comptype = chunk.read(4)
|
|
|
|
#DEBUG start
|
|
|
|
if kludge:
|
|
|
|
length = ord(chunk.file.read(1))
|
|
|
|
if length & 1 == 0:
|
|
|
|
length = length + 1
|
|
|
|
chunk.chunksize = chunk.chunksize + length
|
|
|
|
chunk.file.seek(-1, 1)
|
|
|
|
#DEBUG end
|
|
|
|
self._compname = _read_string(chunk)
|
2008-06-08 03:01:03 +08:00
|
|
|
if self._comptype != b'NONE':
|
|
|
|
if self._comptype == b'G722':
|
|
|
|
self._convert = self._adpcm2lin
|
|
|
|
self._framesize = self._framesize // 4
|
|
|
|
elif self._comptype in (b'ulaw', b'ULAW'):
|
|
|
|
self._convert = self._ulaw2lin
|
|
|
|
self._framesize = self._framesize // 2
|
|
|
|
elif self._comptype in (b'alaw', b'ALAW'):
|
|
|
|
self._convert = self._alaw2lin
|
|
|
|
self._framesize = self._framesize // 2
|
2000-02-02 23:10:15 +08:00
|
|
|
else:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('unsupported compression type')
|
2000-02-02 23:10:15 +08:00
|
|
|
else:
|
2008-06-08 03:01:03 +08:00
|
|
|
self._comptype = b'NONE'
|
|
|
|
self._compname = b'not compressed'
|
2000-02-02 23:10:15 +08:00
|
|
|
|
|
|
|
def _readmark(self, chunk):
|
|
|
|
nmarkers = _read_short(chunk)
|
|
|
|
# Some files appear to contain invalid counts.
|
|
|
|
# Cope with this by testing for EOF.
|
|
|
|
try:
|
|
|
|
for i in range(nmarkers):
|
|
|
|
id = _read_short(chunk)
|
|
|
|
pos = _read_long(chunk)
|
|
|
|
name = _read_string(chunk)
|
|
|
|
if pos or name:
|
|
|
|
# some files appear to have
|
|
|
|
# dummy markers consisting of
|
|
|
|
# a position 0 and name ''
|
|
|
|
self._markers.append((id, pos, name))
|
|
|
|
except EOFError:
|
2007-02-09 13:37:30 +08:00
|
|
|
print('Warning: MARK chunk contains only', end=' ')
|
|
|
|
print(len(self._markers), end=' ')
|
|
|
|
if len(self._markers) == 1: print('marker', end=' ')
|
|
|
|
else: print('markers', end=' ')
|
|
|
|
print('instead of', nmarkers)
|
1993-01-22 20:53:11 +08:00
|
|
|
|
1993-05-24 22:16:22 +08:00
|
|
|
class Aifc_write:
|
2000-02-02 23:10:15 +08:00
|
|
|
# Variables used in this class:
|
|
|
|
#
|
|
|
|
# These variables are user settable through appropriate methods
|
|
|
|
# of this class:
|
|
|
|
# _file -- the open file with methods write(), close(), tell(), seek()
|
|
|
|
# set through the __init__() method
|
|
|
|
# _comptype -- the AIFF-C compression type ('NONE' in AIFF)
|
|
|
|
# set through the setcomptype() or setparams() method
|
|
|
|
# _compname -- the human-readable AIFF-C compression type
|
|
|
|
# set through the setcomptype() or setparams() method
|
|
|
|
# _nchannels -- the number of audio channels
|
|
|
|
# set through the setnchannels() or setparams() method
|
|
|
|
# _sampwidth -- the number of bytes per audio sample
|
|
|
|
# set through the setsampwidth() or setparams() method
|
|
|
|
# _framerate -- the sampling frequency
|
|
|
|
# set through the setframerate() or setparams() method
|
|
|
|
# _nframes -- the number of audio frames written to the header
|
|
|
|
# set through the setnframes() or setparams() method
|
|
|
|
# _aifc -- whether we're writing an AIFF-C file or an AIFF file
|
|
|
|
# set through the aifc() method, reset through the
|
|
|
|
# aiff() method
|
|
|
|
#
|
|
|
|
# These variables are used internally only:
|
|
|
|
# _version -- the AIFF-C version number
|
|
|
|
# _comp -- the compressor from builtin module cl
|
|
|
|
# _nframeswritten -- the number of audio frames actually written
|
|
|
|
# _datalength -- the size of the audio samples written to the header
|
|
|
|
# _datawritten -- the size of the audio samples actually written
|
|
|
|
|
|
|
|
def __init__(self, f):
|
2008-06-08 03:01:03 +08:00
|
|
|
if isinstance(f, str):
|
2000-02-02 23:10:15 +08:00
|
|
|
filename = f
|
2007-12-02 17:40:06 +08:00
|
|
|
f = builtins.open(f, 'wb')
|
2000-02-02 23:10:15 +08:00
|
|
|
else:
|
|
|
|
# else, assume it is an open file object already
|
|
|
|
filename = '???'
|
|
|
|
self.initfp(f)
|
|
|
|
if filename[-5:] == '.aiff':
|
|
|
|
self._aifc = 0
|
|
|
|
else:
|
|
|
|
self._aifc = 1
|
|
|
|
|
|
|
|
def initfp(self, file):
|
|
|
|
self._file = file
|
|
|
|
self._version = _AIFC_version
|
2008-06-08 03:01:03 +08:00
|
|
|
self._comptype = b'NONE'
|
|
|
|
self._compname = b'not compressed'
|
2000-02-02 23:10:15 +08:00
|
|
|
self._convert = None
|
|
|
|
self._nchannels = 0
|
|
|
|
self._sampwidth = 0
|
|
|
|
self._framerate = 0
|
|
|
|
self._nframes = 0
|
|
|
|
self._nframeswritten = 0
|
|
|
|
self._datawritten = 0
|
|
|
|
self._datalength = 0
|
|
|
|
self._markers = []
|
|
|
|
self._marklength = 0
|
|
|
|
self._aifc = 1 # AIFF-C is default
|
|
|
|
|
|
|
|
def __del__(self):
|
2012-01-02 05:53:08 +08:00
|
|
|
self.close()
|
2000-02-02 23:10:15 +08:00
|
|
|
|
|
|
|
#
|
|
|
|
# User visible methods.
|
|
|
|
#
|
|
|
|
def aiff(self):
|
|
|
|
if self._nframeswritten:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('cannot change parameters after starting to write')
|
2000-02-02 23:10:15 +08:00
|
|
|
self._aifc = 0
|
|
|
|
|
|
|
|
def aifc(self):
|
|
|
|
if self._nframeswritten:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('cannot change parameters after starting to write')
|
2000-02-02 23:10:15 +08:00
|
|
|
self._aifc = 1
|
|
|
|
|
|
|
|
def setnchannels(self, nchannels):
|
|
|
|
if self._nframeswritten:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('cannot change parameters after starting to write')
|
2000-02-02 23:10:15 +08:00
|
|
|
if nchannels < 1:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('bad # of channels')
|
2000-02-02 23:10:15 +08:00
|
|
|
self._nchannels = nchannels
|
|
|
|
|
|
|
|
def getnchannels(self):
|
|
|
|
if not self._nchannels:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('number of channels not set')
|
2000-02-02 23:10:15 +08:00
|
|
|
return self._nchannels
|
|
|
|
|
|
|
|
def setsampwidth(self, sampwidth):
|
|
|
|
if self._nframeswritten:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('cannot change parameters after starting to write')
|
2000-02-02 23:10:15 +08:00
|
|
|
if sampwidth < 1 or sampwidth > 4:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('bad sample width')
|
2000-02-02 23:10:15 +08:00
|
|
|
self._sampwidth = sampwidth
|
|
|
|
|
|
|
|
def getsampwidth(self):
|
|
|
|
if not self._sampwidth:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('sample width not set')
|
2000-02-02 23:10:15 +08:00
|
|
|
return self._sampwidth
|
|
|
|
|
|
|
|
def setframerate(self, framerate):
|
|
|
|
if self._nframeswritten:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('cannot change parameters after starting to write')
|
2000-02-02 23:10:15 +08:00
|
|
|
if framerate <= 0:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('bad frame rate')
|
2000-02-02 23:10:15 +08:00
|
|
|
self._framerate = framerate
|
|
|
|
|
|
|
|
def getframerate(self):
|
|
|
|
if not self._framerate:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('frame rate not set')
|
2000-02-02 23:10:15 +08:00
|
|
|
return self._framerate
|
|
|
|
|
|
|
|
def setnframes(self, nframes):
|
|
|
|
if self._nframeswritten:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('cannot change parameters after starting to write')
|
2000-02-02 23:10:15 +08:00
|
|
|
self._nframes = nframes
|
|
|
|
|
|
|
|
def getnframes(self):
|
|
|
|
return self._nframeswritten
|
|
|
|
|
|
|
|
def setcomptype(self, comptype, compname):
|
|
|
|
if self._nframeswritten:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('cannot change parameters after starting to write')
|
2008-06-08 03:01:03 +08:00
|
|
|
if comptype not in (b'NONE', b'ulaw', b'ULAW',
|
|
|
|
b'alaw', b'ALAW', b'G722'):
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('unsupported compression type')
|
2000-02-02 23:10:15 +08:00
|
|
|
self._comptype = comptype
|
|
|
|
self._compname = compname
|
|
|
|
|
|
|
|
def getcomptype(self):
|
|
|
|
return self._comptype
|
|
|
|
|
|
|
|
def getcompname(self):
|
|
|
|
return self._compname
|
|
|
|
|
|
|
|
## def setversion(self, version):
|
|
|
|
## if self._nframeswritten:
|
|
|
|
## raise Error, 'cannot change parameters after starting to write'
|
|
|
|
## self._version = version
|
|
|
|
|
2007-05-16 02:46:22 +08:00
|
|
|
def setparams(self, params):
|
|
|
|
nchannels, sampwidth, framerate, nframes, comptype, compname = params
|
2000-02-02 23:10:15 +08:00
|
|
|
if self._nframeswritten:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('cannot change parameters after starting to write')
|
2008-06-08 03:01:03 +08:00
|
|
|
if comptype not in (b'NONE', b'ulaw', b'ULAW',
|
|
|
|
b'alaw', b'ALAW', b'G722'):
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('unsupported compression type')
|
2000-02-02 23:10:15 +08:00
|
|
|
self.setnchannels(nchannels)
|
|
|
|
self.setsampwidth(sampwidth)
|
|
|
|
self.setframerate(framerate)
|
|
|
|
self.setnframes(nframes)
|
|
|
|
self.setcomptype(comptype, compname)
|
|
|
|
|
|
|
|
def getparams(self):
|
|
|
|
if not self._nchannels or not self._sampwidth or not self._framerate:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('not all parameters set')
|
2000-02-02 23:10:15 +08:00
|
|
|
return self._nchannels, self._sampwidth, self._framerate, \
|
|
|
|
self._nframes, self._comptype, self._compname
|
|
|
|
|
|
|
|
def setmark(self, id, pos, name):
|
|
|
|
if id <= 0:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('marker ID must be > 0')
|
2000-02-02 23:10:15 +08:00
|
|
|
if pos < 0:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('marker position must be >= 0')
|
2012-01-02 05:53:08 +08:00
|
|
|
if not isinstance(name, bytes):
|
|
|
|
raise Error('marker name must be bytes')
|
2000-02-02 23:10:15 +08:00
|
|
|
for i in range(len(self._markers)):
|
|
|
|
if id == self._markers[i][0]:
|
|
|
|
self._markers[i] = id, pos, name
|
|
|
|
return
|
|
|
|
self._markers.append((id, pos, name))
|
|
|
|
|
|
|
|
def getmark(self, id):
|
|
|
|
for marker in self._markers:
|
|
|
|
if id == marker[0]:
|
|
|
|
return marker
|
2008-06-08 03:01:03 +08:00
|
|
|
raise Error('marker {0!r} does not exist'.format(id))
|
2000-02-02 23:10:15 +08:00
|
|
|
|
|
|
|
def getmarkers(self):
|
|
|
|
if len(self._markers) == 0:
|
|
|
|
return None
|
|
|
|
return self._markers
|
2001-01-15 02:09:23 +08:00
|
|
|
|
2000-02-02 23:10:15 +08:00
|
|
|
def tell(self):
|
|
|
|
return self._nframeswritten
|
|
|
|
|
|
|
|
def writeframesraw(self, data):
|
|
|
|
self._ensure_header_written(len(data))
|
2008-06-08 03:01:03 +08:00
|
|
|
nframes = len(data) // (self._sampwidth * self._nchannels)
|
2000-02-02 23:10:15 +08:00
|
|
|
if self._convert:
|
|
|
|
data = self._convert(data)
|
|
|
|
self._file.write(data)
|
|
|
|
self._nframeswritten = self._nframeswritten + nframes
|
|
|
|
self._datawritten = self._datawritten + len(data)
|
|
|
|
|
|
|
|
def writeframes(self, data):
|
|
|
|
self.writeframesraw(data)
|
|
|
|
if self._nframeswritten != self._nframes or \
|
|
|
|
self._datalength != self._datawritten:
|
|
|
|
self._patchheader()
|
|
|
|
|
|
|
|
def close(self):
|
2012-01-02 05:53:08 +08:00
|
|
|
if self._file:
|
|
|
|
self._ensure_header_written(0)
|
|
|
|
if self._datawritten & 1:
|
|
|
|
# quick pad to even size
|
|
|
|
self._file.write(b'\x00')
|
|
|
|
self._datawritten = self._datawritten + 1
|
|
|
|
self._writemarkers()
|
|
|
|
if self._nframeswritten != self._nframes or \
|
|
|
|
self._datalength != self._datawritten or \
|
|
|
|
self._marklength:
|
|
|
|
self._patchheader()
|
|
|
|
# Prevent ref cycles
|
|
|
|
self._convert = None
|
|
|
|
self._file.close()
|
|
|
|
self._file = None
|
2000-02-02 23:10:15 +08:00
|
|
|
|
|
|
|
#
|
|
|
|
# Internal methods.
|
|
|
|
#
|
|
|
|
|
2008-06-08 03:01:03 +08:00
|
|
|
def _lin2alaw(self, data):
|
|
|
|
import audioop
|
|
|
|
return audioop.lin2alaw(data, 2)
|
2000-02-02 23:10:15 +08:00
|
|
|
|
|
|
|
def _lin2ulaw(self, data):
|
|
|
|
import audioop
|
|
|
|
return audioop.lin2ulaw(data, 2)
|
|
|
|
|
|
|
|
def _lin2adpcm(self, data):
|
|
|
|
import audioop
|
|
|
|
if not hasattr(self, '_adpcmstate'):
|
|
|
|
self._adpcmstate = None
|
2008-06-08 03:01:03 +08:00
|
|
|
data, self._adpcmstate = audioop.lin2adpcm(data, 2, self._adpcmstate)
|
2000-02-02 23:10:15 +08:00
|
|
|
return data
|
|
|
|
|
|
|
|
def _ensure_header_written(self, datasize):
|
|
|
|
if not self._nframeswritten:
|
2012-01-02 01:04:37 +08:00
|
|
|
if self._comptype in (b'ULAW', b'ulaw', b'ALAW', b'alaw', b'G722'):
|
2000-02-02 23:10:15 +08:00
|
|
|
if not self._sampwidth:
|
|
|
|
self._sampwidth = 2
|
|
|
|
if self._sampwidth != 2:
|
2008-06-08 03:01:03 +08:00
|
|
|
raise Error('sample width must be 2 when compressing '
|
2012-01-02 01:04:37 +08:00
|
|
|
'with ulaw/ULAW, alaw/ALAW or G7.22 (ADPCM)')
|
2000-02-02 23:10:15 +08:00
|
|
|
if not self._nchannels:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('# channels not specified')
|
2000-02-02 23:10:15 +08:00
|
|
|
if not self._sampwidth:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('sample width not specified')
|
2000-02-02 23:10:15 +08:00
|
|
|
if not self._framerate:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error('sampling rate not specified')
|
2000-02-02 23:10:15 +08:00
|
|
|
self._write_header(datasize)
|
|
|
|
|
|
|
|
def _init_compression(self):
|
2008-06-08 03:01:03 +08:00
|
|
|
if self._comptype == b'G722':
|
2000-02-02 23:10:15 +08:00
|
|
|
self._convert = self._lin2adpcm
|
2008-06-08 03:01:03 +08:00
|
|
|
elif self._comptype in (b'ulaw', b'ULAW'):
|
|
|
|
self._convert = self._lin2ulaw
|
|
|
|
elif self._comptype in (b'alaw', b'ALAW'):
|
|
|
|
self._convert = self._lin2alaw
|
2000-02-02 23:10:15 +08:00
|
|
|
|
|
|
|
def _write_header(self, initlength):
|
2008-06-08 03:01:03 +08:00
|
|
|
if self._aifc and self._comptype != b'NONE':
|
2000-02-02 23:10:15 +08:00
|
|
|
self._init_compression()
|
2008-06-08 03:01:03 +08:00
|
|
|
self._file.write(b'FORM')
|
2000-02-02 23:10:15 +08:00
|
|
|
if not self._nframes:
|
2008-06-08 03:01:03 +08:00
|
|
|
self._nframes = initlength // (self._nchannels * self._sampwidth)
|
2000-02-02 23:10:15 +08:00
|
|
|
self._datalength = self._nframes * self._nchannels * self._sampwidth
|
|
|
|
if self._datalength & 1:
|
|
|
|
self._datalength = self._datalength + 1
|
|
|
|
if self._aifc:
|
2008-06-08 03:01:03 +08:00
|
|
|
if self._comptype in (b'ulaw', b'ULAW', b'alaw', b'ALAW'):
|
|
|
|
self._datalength = self._datalength // 2
|
2000-02-02 23:10:15 +08:00
|
|
|
if self._datalength & 1:
|
|
|
|
self._datalength = self._datalength + 1
|
2008-06-08 03:01:03 +08:00
|
|
|
elif self._comptype == b'G722':
|
|
|
|
self._datalength = (self._datalength + 3) // 4
|
2000-02-02 23:10:15 +08:00
|
|
|
if self._datalength & 1:
|
|
|
|
self._datalength = self._datalength + 1
|
|
|
|
self._form_length_pos = self._file.tell()
|
|
|
|
commlength = self._write_form_length(self._datalength)
|
|
|
|
if self._aifc:
|
2008-06-08 03:01:03 +08:00
|
|
|
self._file.write(b'AIFC')
|
|
|
|
self._file.write(b'FVER')
|
2012-01-18 00:13:04 +08:00
|
|
|
_write_ulong(self._file, 4)
|
|
|
|
_write_ulong(self._file, self._version)
|
2000-02-02 23:10:15 +08:00
|
|
|
else:
|
2008-06-08 03:01:03 +08:00
|
|
|
self._file.write(b'AIFF')
|
|
|
|
self._file.write(b'COMM')
|
2012-01-18 00:13:04 +08:00
|
|
|
_write_ulong(self._file, commlength)
|
2000-02-02 23:10:15 +08:00
|
|
|
_write_short(self._file, self._nchannels)
|
|
|
|
self._nframes_pos = self._file.tell()
|
2012-01-18 00:13:04 +08:00
|
|
|
_write_ulong(self._file, self._nframes)
|
2000-02-02 23:10:15 +08:00
|
|
|
_write_short(self._file, self._sampwidth * 8)
|
|
|
|
_write_float(self._file, self._framerate)
|
|
|
|
if self._aifc:
|
|
|
|
self._file.write(self._comptype)
|
|
|
|
_write_string(self._file, self._compname)
|
2008-06-08 03:01:03 +08:00
|
|
|
self._file.write(b'SSND')
|
2000-02-02 23:10:15 +08:00
|
|
|
self._ssnd_length_pos = self._file.tell()
|
2012-01-18 00:13:04 +08:00
|
|
|
_write_ulong(self._file, self._datalength + 8)
|
|
|
|
_write_ulong(self._file, 0)
|
|
|
|
_write_ulong(self._file, 0)
|
2000-02-02 23:10:15 +08:00
|
|
|
|
|
|
|
def _write_form_length(self, datalength):
|
|
|
|
if self._aifc:
|
|
|
|
commlength = 18 + 5 + len(self._compname)
|
|
|
|
if commlength & 1:
|
|
|
|
commlength = commlength + 1
|
|
|
|
verslength = 12
|
|
|
|
else:
|
|
|
|
commlength = 18
|
|
|
|
verslength = 0
|
2012-01-18 00:13:04 +08:00
|
|
|
_write_ulong(self._file, 4 + verslength + self._marklength + \
|
|
|
|
8 + commlength + 16 + datalength)
|
2000-02-02 23:10:15 +08:00
|
|
|
return commlength
|
|
|
|
|
|
|
|
def _patchheader(self):
|
|
|
|
curpos = self._file.tell()
|
|
|
|
if self._datawritten & 1:
|
|
|
|
datalength = self._datawritten + 1
|
2008-06-08 03:01:03 +08:00
|
|
|
self._file.write(b'\x00')
|
2000-02-02 23:10:15 +08:00
|
|
|
else:
|
|
|
|
datalength = self._datawritten
|
|
|
|
if datalength == self._datalength and \
|
|
|
|
self._nframes == self._nframeswritten and \
|
|
|
|
self._marklength == 0:
|
|
|
|
self._file.seek(curpos, 0)
|
|
|
|
return
|
|
|
|
self._file.seek(self._form_length_pos, 0)
|
|
|
|
dummy = self._write_form_length(datalength)
|
|
|
|
self._file.seek(self._nframes_pos, 0)
|
2012-01-18 00:13:04 +08:00
|
|
|
_write_ulong(self._file, self._nframeswritten)
|
2000-02-02 23:10:15 +08:00
|
|
|
self._file.seek(self._ssnd_length_pos, 0)
|
2012-01-18 00:13:04 +08:00
|
|
|
_write_ulong(self._file, datalength + 8)
|
2000-02-02 23:10:15 +08:00
|
|
|
self._file.seek(curpos, 0)
|
|
|
|
self._nframes = self._nframeswritten
|
|
|
|
self._datalength = datalength
|
|
|
|
|
|
|
|
def _writemarkers(self):
|
|
|
|
if len(self._markers) == 0:
|
|
|
|
return
|
2008-06-08 03:01:03 +08:00
|
|
|
self._file.write(b'MARK')
|
2000-02-02 23:10:15 +08:00
|
|
|
length = 2
|
|
|
|
for marker in self._markers:
|
|
|
|
id, pos, name = marker
|
|
|
|
length = length + len(name) + 1 + 6
|
|
|
|
if len(name) & 1 == 0:
|
|
|
|
length = length + 1
|
2012-01-18 00:13:04 +08:00
|
|
|
_write_ulong(self._file, length)
|
2000-02-02 23:10:15 +08:00
|
|
|
self._marklength = length + 8
|
|
|
|
_write_short(self._file, len(self._markers))
|
|
|
|
for marker in self._markers:
|
|
|
|
id, pos, name = marker
|
|
|
|
_write_short(self._file, id)
|
2012-01-18 00:13:04 +08:00
|
|
|
_write_ulong(self._file, pos)
|
2000-02-02 23:10:15 +08:00
|
|
|
_write_string(self._file, name)
|
1993-01-22 20:53:11 +08:00
|
|
|
|
1999-06-23 05:23:23 +08:00
|
|
|
def open(f, mode=None):
|
2000-02-02 23:10:15 +08:00
|
|
|
if mode is None:
|
|
|
|
if hasattr(f, 'mode'):
|
|
|
|
mode = f.mode
|
|
|
|
else:
|
|
|
|
mode = 'rb'
|
|
|
|
if mode in ('r', 'rb'):
|
|
|
|
return Aifc_read(f)
|
|
|
|
elif mode in ('w', 'wb'):
|
|
|
|
return Aifc_write(f)
|
|
|
|
else:
|
2007-08-30 09:19:48 +08:00
|
|
|
raise Error("mode must be 'r', 'rb', 'w', or 'wb'")
|
1993-01-22 20:53:11 +08:00
|
|
|
|
1993-12-17 23:25:27 +08:00
|
|
|
openfp = open # B/W compatibility
|
1996-12-31 13:57:34 +08:00
|
|
|
|
|
|
|
if __name__ == '__main__':
|
2000-02-02 23:10:15 +08:00
|
|
|
import sys
|
|
|
|
if not sys.argv[1:]:
|
|
|
|
sys.argv.append('/usr/demos/data/audio/bach.aiff')
|
|
|
|
fn = sys.argv[1]
|
|
|
|
f = open(fn, 'r')
|
2007-02-09 13:37:30 +08:00
|
|
|
print("Reading", fn)
|
|
|
|
print("nchannels =", f.getnchannels())
|
|
|
|
print("nframes =", f.getnframes())
|
|
|
|
print("sampwidth =", f.getsampwidth())
|
|
|
|
print("framerate =", f.getframerate())
|
|
|
|
print("comptype =", f.getcomptype())
|
|
|
|
print("compname =", f.getcompname())
|
2000-02-02 23:10:15 +08:00
|
|
|
if sys.argv[2:]:
|
|
|
|
gn = sys.argv[2]
|
2007-02-09 13:37:30 +08:00
|
|
|
print("Writing", gn)
|
2000-02-02 23:10:15 +08:00
|
|
|
g = open(gn, 'w')
|
|
|
|
g.setparams(f.getparams())
|
|
|
|
while 1:
|
|
|
|
data = f.readframes(1024)
|
|
|
|
if not data:
|
|
|
|
break
|
|
|
|
g.writeframes(data)
|
|
|
|
g.close()
|
|
|
|
f.close()
|
2007-02-09 13:37:30 +08:00
|
|
|
print("Done.")
|