/snap/core24/1643/usr/lib/python3.12/__pycache__
Edit: /snap/core24/1643/usr/lib/python3.12/__pycache__/aifc.cpython-312.pyc (42863B)
Цi b d Z ddlZddlZddlZddgZ ej
ed G d de ZdZ d Z
d
Z d Z d Z
d
ZdZd Zd Zd Zd Zd Zd Zd Z ej. 5 ej0 de ddlmZ ddd ddl m Z e dd Z de j> _ d e j@ _ d e jB _ d e jD _ d e jF _ d e jH _ G d! d" Z% G d# d$ Z&d6d%Z'ed&k( rkddl(Z(e(jR d'd se(jR jU d( e(jR d' Z+ e'e+d) 5 Z, e-d*e+ e-d+e,j] e-d,e,j_ e-d-e,ja e-d.e,jc e-d/e,je e-d0e,jg e(jR d1d rye(jR d1 Z4 e-d2e4 e'e4d3 5 Z5e5jm e,jo e,jq d4 Z9e9sne5ju e9 & ddd e-d5 ddd yy# 1 sw Y xY w# 1 sw Y (xY w# 1 sw Y yxY w)7aJ Stuff to parse AIFF-C and AIFF files.
Unless explicitly stated otherwise, the description below is true
both for AIFF-C files and AIFF files.
An AIFF-C file has the following structure.
+-----------------+
| FORM |
+-----------------+
|
|
+----+------------+
| | AIFC |
| +------------+
| | |
| | . |
| | . |
| | . |
+----+------------+
An AIFF file has the string "AIFF" instead of "AIFC".
A chunk consists of an identifier (4 bytes) followed by a size (4 bytes,
big endian order), followed by the data. The size field does not include
the size of the 8 byte header.
The following chunk types are recognized.
FVER
(AIFF-C only).
MARK
<# of markers> (2 bytes)
list of markers:
(2 bytes, must be > 0)
(4 bytes)
("pstring")
COMM
<# of channels> (2 bytes)
<# of sound frames> (4 bytes)
(2 bytes)
(10 bytes, IEEE 80-bit extended
floating point)
in AIFF-C files only:
(4 bytes)
("pstring")
SSND
(4 bytes, not used by this program)
(4 bytes, not used by this program)
A pstring consists of 1 byte length, a string of characters, and 0 or 1
byte pad to make the total length even.
Usage.
Reading AIFF files:
f = aifc.open(file, 'r')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods read(), seek(), and close().
In some types of audio files, if the setpos() method is not used,
the seek() method is not necessary.
This returns an instance of a class with the following public methods:
getnchannels() -- returns number of audio channels (1 for
mono, 2 for stereo)
getsampwidth() -- returns sample width in bytes
getframerate() -- returns sampling frequency
getnframes() -- returns number of audio frames
getcomptype() -- returns compression type ('NONE' for AIFF files)
getcompname() -- returns human-readable version of
compression type ('not compressed' for AIFF files)
getparams() -- returns a namedtuple consisting of all of the
above in the above order
getmarkers() -- get the list of marks in the audio file or None
if there are no marks
getmark(id) -- get mark with the specified id (raises an error
if the mark does not exist)
readframes(n) -- returns at most n frames of audio
rewind() -- rewind to the beginning of the audio stream
setpos(pos) -- seek to the specified position
tell() -- return the current position
close() -- close the instance (make it unusable)
The position returned by tell(), the position given to setpos() and
the position of marks are all compatible and have nothing to do with
the actual position in the file.
The close() method is called automatically when the class instance
is destroyed.
Writing AIFF files:
f = aifc.open(file, 'w')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods write(), tell(), seek(), and
close().
This returns an instance of a class with the following public methods:
aiff() -- create an AIFF file (AIFF-C default)
aifc() -- create an AIFF-C file
setnchannels(n) -- set the number of channels
setsampwidth(n) -- set the sample width
setframerate(n) -- set the frame rate
setnframes(n) -- set the number of frames
setcomptype(type, name)
-- set the compression type and the
human-readable compression type
setparams(tuple)
-- set all parameters at once
setmark(id, pos, name)
-- add specified mark to the list of marks
tell() -- return current position in output file (useful
in combination with setmark())
writeframesraw(data)
-- write audio frames without pathing up the
file header
writeframes(data)
-- write audio frames and patch up the file header
close() -- patch up the file header and close the
output file
You should set the parameters before the first writeframesraw or
writeframes. The total number of frames does not need to be set,
but when it is set to the correct value, the header does not have to
be patched up.
It is best to first set all parameters, perhaps possibly the
compression type, and then write audio frames using writeframesraw.
When all frames have been written, either call writeframes(b'') or
close() to patch up the sizes in the header.
Marks can be added anytime. If there are any marks, you must call
close() after all frames have been written.
The close() method is called automatically when the class instance
is destroyed.
When a file is opened with the extension '.aiff', an AIFF file is
written, otherwise an AIFF-C file is written. This default can be
changed by calling aiff() or aifc() before the first writeframes or
writeframesraw.
NErroropen)
)removec e Zd Zy)r N)__name__
__module__ __qualname__ /usr/lib/python3.12/aifc.pyr r s r
l @Q E c t j d| j d d S # t j $ r t d w xY w)N>l r structunpackreaderrorEOFErrorfiles r
_read_longr @ !}}T499Q<033 << !D ! '* Ac t j d| j d d S # t j $ r t d w xY w)N>Lr r r r s r _read_ulongr r r c t j d| j d d S # t j $ r t d w xY w)N>h r r r s r _read_shortr# r r c t j d| j d d S # t j $ r t d w xY w)N>Hr" r r r s r _read_ushortr& r r c t | j d }|dk( rd}n| j | }|dz dk( r| j d }|S )N r r
)ordr )r lengthdatadummys r _read_stringr- sK
1
F
{yy
zQ ! Kr
gc t | }d}|dk rd}|dz }t | }t | }||cxk( r |cxk( rdk( r
n nd} || z S |dk( r t } || z S |dz
}|dz |z t d |d
z
z } || z S ) Nr( r g i? l g @? )r# r _HUGE_VALpow)fexponsignhimantlomants r _read_floatr: s NE D qy
^F
^F %&%A% !8O
& !8O
k
!F
*c#urz.B B !8Or
c N | j t j d| y )Nr! writer packr5 xs r _write_shortrA GGFKKa !r
c N | j t j d| y )Nr% r< r? s r
_write_ushortrD rB r
c N | j t j d| y )Nr r< r? s r _write_longrF rB r
c N | j t j d| y )Nr r< r? s r _write_ulongrH rB r
c t | dkD r t d | j t j dt | | j | t | dz dk( r| j d y y )N z%string exceeds maximum pstring lengthBr( r )len
ValueErrorr= r r> )r5 ss r
_write_stringrP s_
1v|@AAGGFKKSV $%GGAJ
1vzQ r
c dd l }|dk rd}|dz }nd}|dk( rd}d}d}n|j | \ }}|dkD s
|dk\ s||k7 r
|dz }d}d}n|dz }|dk r|j || }d}||z }|j |d }|j | }t | }|j ||z
d }|j | }t | }t | | t
| | t
| | y ) Nr r0 r/ i @ r( r1 i? )mathfrexpldexpfloorintrD rH ) r5 r@ rS r7 r6 r8 r9 fmantfsmants r _write_floatrZ s
1u
FAvzz!} u 5=EQJ%5.KEFFEMEqy
5%0DLEJJub)EZZ&F[FJJuv~r2EZZ&F[F!UFFr
ignore)Chunk)
namedtuple _aifc_paramsz7nchannels sampwidth framerate nframes comptype compnamez3Number of audio channels (1 for mono, 2 for stereo)zSample width in byteszSampling frequencyzNumber of audio framesz(Compression type ("NONE" for AIFF files)zRA human-readable version of the compression type
('not compressed' for AIFF files)c e Zd ZdZd Zd Zd Zd Zd Zd Z d Z
d Z d
Z d Z
d Zd
Zd Zd Zd Zd Zd Zd Zd Zd Zd Zd Zd Zd Zd Z y) Aifc_readNc d| _ d | _ g | _ d| _ || _ t | }|j
dk7 r t d |j d }|dk( rd| _ n|dk( rd| _ n t d d| _
d | _ d| _ t | j }|j
}|d k( r| j | d| _
nQ|d
k( r || _ |j d }d| _ n,|d k( rt | | _ n|d
k( r| j! | |j# # t $ r Y nw xY w| j r | j s t d y )Nr FORMz file does not start with FORM idr AIFF AIFCr( znot an AIFF or AIFF-C file COMM SSND FVER MARKz$COMM chunk and/or SSND chunk missing)_version_convert_markers _soundpos_filer\ getnamer r _aifc_comm_chunk_read _ssnd_chunk_ssnd_seek_neededr _read_comm_chunkr _readmarkskip)selfr chunkformdata chunknamer, s r initfpzAifc_read.initfp: sk
d ==?g %:; ;::a= w DJ
DJ45 5 ! %&D "
djj)
IG#%%e,()%g%#(
1
)*&g% +E 2
g%u% JJL%
$$D,<,<>? ? -=s D? ? E
E c t |t r)t j |d } | j | y | j | y # |j xY w)Nrb)
isinstancestrbuiltinsr r{ closerw r5 file_objects r __init__zAifc_read.__init__b sP a "--40K
K(
KKN
!!#s A A c | S Nr rw s r __enter__zAifc_read.__enter__n r
c $ | j y r r rw argss r __exit__zAifc_read.__exit__q
r
c | j S r )rn r s r getfpzAifc_read.getfpw s zzr
c d| _ d| _ y )Nr( r )rs rm r s r rewindzAifc_read.rewindz s !" r
c P | j }|d | _ |j y y r )rn r rw r s r r zAifc_read.close~ s& zz DJ JJL r
c | j S r )rm r s r tellzAifc_read.tell ~~ r
c | j S r )
_nchannelsr s r getnchannelszAifc_read.getnchannels r
c | j S r )_nframesr s r
getnframeszAifc_read.getnframes s }} r
c | j S r )
_sampwidthr s r getsampwidthzAifc_read.getsampwidth r r
c | j S r )
_framerater s r getframeratezAifc_read.getframerate r r
c | j S r _comptyper s r getcomptypezAifc_read.getcomptype r r
c | j S r _compnamer s r getcompnamezAifc_read.getcompname r r
c t | j | j | j | j | j | j
S r )r^ r r r r r r r s r getparamszAifc_read.getparams sS D - - /1B1B1D - - / 1B , , .0@0@0BD Dr
c L t | j dk( ry | j S Nr rM rl r s r
getmarkerszAifc_read.getmarkers t}} "}} r
c p | j D ] }||d k( s |c S t dj | Nr zmarker {0!r} does not existrl r formatrw idmarkers r getmarkzAifc_read.getmark > mm FVAY
188<==r
c ^ |dk s|| j kD r t d || _ d| _ y )Nr zposition not in ranger( )r r rm rs )rw poss r setposzAifc_read.setpos s/ 7cDMM)/0 0 !" r
c | j rv| j j d | j j d }| j | j
z }|r | j j |dz d| _ |dk( ry| j j || j
z }| j r|r| j
| }| j t | | j | j z z z | _ |S )Nr rg r
)
rs rr seekr rm
_framesizerk rM r r )rw nframesr, r r+ s r
readframeszAifc_read.readframes s ! ! ! !! $$$))!,E..4??2C %%cAg.%&D " a< $$Wt%>? ==T==&D #d):>//9J +K K r
c t j 5 t j dt dd l}d d d j |d S # 1 sw Y xY wNr[ categoryr r" )warningscatch_warnings simplefilterDeprecationWarningaudioopalaw2linrw r+ r s r _alaw2linzAifc_read._alaw2lin L
$
$
& ! !(5G H a(( AAc t j 5 t j dt dd l}d d d j |d S # 1 sw Y xY wr )r r r r r ulaw2linr s r _ulaw2linzAifc_read._ulaw2lin r r c t j 5 t j dt dd l}d d d t | d sd | _ j |d| j \ }| _ |S # 1 sw Y CxY wNr[ r r _adpcmstater" )r r r r r hasattrr adpcm2linr s r
_adpcm2linzAifc_read._adpcm2lin sr
$
$
& ! !(5G H t]+ #D !(!2!24D>W,$(OODM^^'99$(NNDM^^'99$(NNDM^^'99$(NNDM >??"# ) %DN .DNr
c | t | } t | D ]F }t | }t | }t | }|s|s)| j j |||f H y # t $ rP dt | j dt | j dk( rdndd|}t j | Y y w xY w)Nz"Warning: MARK chunk contains only z markerr( rO z instead of )
r# ranger r- rl appendr rM r r )rw rx nmarkersir r namews r ru zAifc_read._readmark s u% 8_
: ' '#E*$ MM(("c4 9
: dmm$C
,>!,Cb&L A
MM! s 3A" A" "AB;:B;) r r
r rn r{ r r r r r r r r r r r r r r r r r r r r r r rt ru r r
r r` r` s H
E&@P
D
> # *) ) ) */X r
r` c e Zd ZdZd Zd Zd Zd Zd Zd Z d Z
d Z d
Z d Z
d Zd
Zd Zd Zd Zd Zd Zd Zd Zd Zd Zd Zd Zd Zd Z d Z d Z d Z d Z d Z!d Z"d! Z#d" Z$d# Z%d$ Z&d% Z'd& Z(y)'
Aifc_writeNc t |t rBt j |d } | j | |j
d rd| _ y y | j | y # |j xY w)Nwbz.aiffr )r~ r r r r{ r endswithrp r s r r zAifc_write.__init__C sj a "--40K
K( zz'"
#
KKN
!!#s A% %A8c || _ t | _ d| _ d| _ d | _ d| _ d| _ d| _ d| _ d| _
d| _ d| _ g | _
d| _ d| _ y )Nr r r r( )rn
_AIFC_versionrj r r rk r r r r _nframeswritten _datawritten _datalengthrl _marklengthrp r s r r{ zAifc_write.initfpS so
%
*
r
c $ | j y r r r s r __del__zAifc_write.__del__d r r
c | S r r r s r r zAifc_write.__enter__g r r
c $ | j y r r r s r r zAifc_write.__exit__j r r
c @ | j r t d d| _ y )N0cannot change parameters after starting to writer r r rp r s r aiffzAifc_write.aiffp JK K
r
c @ | j r t d d| _ y )Nr r( r r s r aifczAifc_write.aifcu r r
c ` | j r t d |dk r t d || _ y )Nr r( r )r r r )rw nchannelss r setnchannelszAifc_write.setnchannelsz s1 JK K q=+, ,#r
c H | j s t d | j S )Nznumber of channels not set)r r r s r r zAifc_write.getnchannels s 45 5 r
c j | j r t d |dk s|dkD r t d || _ y )Nr r( r r )r r r )rw sampwidths r setsampwidthzAifc_write.setsampwidth s7 JK K q=IM*+ +#r
c H | j s t d | j S )Nzsample width not set)r r r s r r zAifc_write.getsampwidth s ./ / r
c ` | j r t d |dk r t d || _ y )Nr r zbad frame rate)r r r )rw framerates r setframeratezAifc_write.setframerate s1 JK K >() )#r
c H | j s t d | j S )Nzframe rate not set)r r r s r r zAifc_write.getframerate s ,- - r
c @ | j r t d || _ y )Nr )r r r )rw r s r
setnframeszAifc_write.setnframes s JK K
r
c | j S r r r s r r zAifc_write.getnframes ###r
c l | j r t d |dvr t d || _ || _ y Nr )r r r r r r r r r )r r r r )rw comptypecompnames r setcomptypezAifc_write.setcomptype s@ JK K I I67 7!!r
c | j S r r r s r r zAifc_write.getcomptype r r
c | j S r r r s r r zAifc_write.getcompname r r
c |\ }}}}}}| j r t d |dvr t d | j | | j | | j | | j | | j
|| y r( )r r r r r r# r+ )rw paramsr r r r r) r* s r setparamszAifc_write.setparams s GMD 9i(H JK K I I67 7 )$ )$ )$ 8,r
c | j r| j r | j s t d t | j | j | j | j
| j | j S )Nznot all parameters set)r r r r r^ r r r r s r r zAifc_write.getparams sU dooT__01 1DOOT__doo MM4>>4>>K Kr
c N |dk r t d |dk r t d t |t s t d t t | j
D ]+ }|| j
| d k( s|||f| j
|< y | j
j
|||f y )Nr zmarker ID must be > 0z marker position must be >= 0zmarker name must be bytes)r r~ bytesr rM rl r )rw r r r r s r setmarkzAifc_write.setmark s
7/0 0 767 7$&34 4s4==)* AT]]1%a((#%sD=
a
b#t_-r
c p | j D ] }||d k( s |c S t dj | r r r s r r zAifc_write.getmark r r
c L t | j dk( ry | j S r r r s r r zAifc_write.getmarkers r r
c | j S r r% r s r r zAifc_write.tell r& r
c t |t t f st | j d }| j t
| t
| | j | j z z }| j r| j | }| j j | | j |z | _ | j t
| z | _
y )NrK )r~ r3 bytearray
memoryviewcast_ensure_header_writtenrM r r rk rn r= r r )rw r+ r s r writeframesrawzAifc_write.writeframesraw s $ 23 d#((-D ##CI.d)$// AB ====&D
# 3 3g = - -D 9r
c | j | | j | j k7 s| j | j k7 r| j y y r )r= r r r r _patchheader)rw r+ s r writeframeszAifc_write.writeframes sG D! 4== 0 $"3"33 4r
c , | j y | j d | j dz r/| j j d | j dz | _ | j | j
| j k7 s%| j | j k7 s | j r| j d | _
| j }d | _ |j y # d | _
| j }d | _ |j w xY w)Nr r( rL ) rn r< r r=
_writemarkersr r r r
r? rk r )rw r5 s r r zAifc_write.close s :: ' ' * 1$
)$($5$5$9! ##t}}4""d&7&77""!!# !DM
A DJ
GGI !DM
A DJ
GGIs B-C' ',Dc t j 5 t j dt dd l}d d d j |d S # 1 sw Y xY wr )r r r r r lin2alawr s r _lin2alawzAifc_write._lin2alaw r r c t j 5 t j dt dd l}d d d j |d S # 1 sw Y xY wr )r r r r r lin2ulawr s r _lin2ulawzAifc_write._lin2ulaw r r c t j 5 t j dt dd l}d d d t | d sd | _ j |d| j \ }| _ |S # 1 sw Y CxY wr )r r r r r r r lin2adpcmr s r
_lin2adpcmzAifc_write._lin2adpcm sr
$
$
& ! !(5G H t]+ #D !(!2!24D>W $ OODM
^^ 1
1 NNDM
^^ 1
1 NNDM
^^ 1
1 NNDM 2r
c h | j r | j dk7 r| j | j j d | j
s!|| j | j z z | _ | j
| j z | j z | _ | j dz r| j dz | _ | j r| j dv r8| j dz | _ | j dz r^| j dz | _ nI| j dk( r:| j dz dz | _ | j dz r| j dz | _ | j j | _
| j | j }| j rm| j j d | j j d
t | j d t | j | j n| j j d | j j d t | j | t! | j | j | j | j j | _ t | j | j
| j d
v rt! | j d n#t! | j | j dz t% | j | j& | j rE| j j | j t) | j | j* | j j d | j | j j | _ t | j | j dz t | j d t | j d y # t t f$ r d | _
Y w xY w)Nr rb r( )r r r r r" r r r rd rh rc re )r r r r r rg rf r )rp r rR rn r= r r r r r _form_length_posAttributeErrorOSError_write_form_lengthrH rj rA _nframes_posrZ r rP r _ssnd_length_pos)rw
initlength
commlengths r rO zAifc_write._write_headerJ s ::$..G3 " " $
!}} &4??T__+L MDM ==4??:T__L a # / /! 3D ::~~!EE#'#3#3q#8 ##a''+'7'7!';D$ 7*$($4$4q$8Q#> ##a''+'7'7!';D$ )$(JJOO$5D ! ,,T-=-=>
:: JJ W % JJ W % Q ' T]] 3 JJ W %
!TZZ,TZZ 1 , $
1D TZZ / >> J J Q ' T__q%8 9TZZ 1 :: JJ T^^ , $**dnn 5
! ,$(JJOO$5D !TZZ!1!1A!56TZZ#TZZ#; ( )$(D ! )s P P10P1c | j r%dt | j z }|dz r|dz }d}nd}d}t | j d|z | j
z dz |z dz |z |S ) Nr r( r r r rg )rp rM r rH rn r
)rw
datalengthr[
verslengths r rW z Aifc_write._write_form_length} s :: #dnn"55JA~ '!^
JJJTZZZ $2B2B!B"#"$&(")+5"6 7r
c L | j j }| j dz r+| j dz }| j j d n | j }|| j k( rE| j
| j k( r,| j dk( r | j j |d y | j j | j d | j | }| j j | j d t | j | j | j j | j d t | j |dz | j j |d | j | _ || _ y )Nr( rL r rg )rn r r r= r r r r
r rT rW rX rH rY )rw curposr_ r, s r r? zAifc_write._patchheader s5 " q **Q.J JJ W % **J )) )mmt 3 33 !# JJOOFA &
--q1''
3
))1-TZZ!5!56
--q1TZZa 0
" ,,
%r
c 8 t | j dk( ry | j j d d}| j D ]3 }|\ }}}|t | z dz dz }t | dz dk( s/|dz }5 t | j | |dz | _ t
| j t | j | j D ]J }|\ }}}t
| j | t | j | t | j | L y )Nr ri r" r( rg )rM rl rn r= rH r
rA rP )rw r* r r r r s r rB zAifc_write._writemarkers s t}} "
!mm $F "MBTc$i'!+a/F4y1}! ! $
TZZ(!A:TZZT]]!34mm ,F "MBT R ( S ) $**d + ,r
))r r
r rn r r{ r r r r r r r r r r r r# r r+ r r r0 r r4 r r r r= r@ r rE rH rK rM r< rR rO rW r? rB r r
r r r # s <
E "
$
$
$
$" -K .>
$ : 2) ) ) )&+1$f &,,r
r c |t | d r
| j }nd}|dv r t | S |dv r t | S t d )Nmoder} )rr} )r r z$mode must be 'r', 'rb', 'w', or 'wb')r rf r` r r )r5 rf s r r r sO | 1f 66DD {|
!} :;;r
__main__r( z /usr/demos/data/audio/bach.aiffrg Readingz nchannels =z nframes =z sampwidth =z framerate =z comptype =z compname =r" Writingr i zDone.r );__doc__r r r __all__ _deprecatedr Exceptionr r r r r# r& r- r3 r: rA rD rF rH rP rZ r r r rx r\ collectionsr] r^ r r r r r) r* r` r r sysargvr fnr5 printr r r r r r gngr0 r r r+ r@ r r
r rv s FP F
Xg . I
! ! ! !
" """"" B X H($67 #.SU "W !8 !5 7 J "%
M M ^N, N,` < z 88AB< 9: !B
b# !
i
mQ^^ -.
mQ\\^,
mQ^^ -.
mQ^^ -.
mQ]]_-
mQ]]_- 88AB<!B )R b#
(! AKKM* <<-D MM$'
(
'N% ^
(
( s2 +J &CJ%*AJ2J% JJ" J%%J.