File: //lib64/python3.8/__pycache__/sndhdr.cpython-38.opt-1.pyc
U
e5d @ s2 d Z ddgZddlmZ eddZdej_ dej_ d ej_ d
ej_ d ej _ d d Z
d
d Z g Z dd Z
e e
dd Ze e dd Ze e dd Ze e dd Ze e dd Ze e dd Ze e d d Ze e d d Zd d! Zd"d# Zd$d% Zd&d' Zd(d) Ze d*kr.e d+S ),a Routines to help recognizing sound files.
Function whathdr() recognizes various types of sound file headers.
It understands almost all headers that SOX can decode.
The return tuple contains the following items, in this order:
- file type (as SOX understands it)
- sampling rate (0 if unknown or hard to decode)
- number of channels (0 if unknown or hard to decode)
- number of frames in the file (-1 if unknown or hard to decode)
- number of bits/sample, or 'U' for U-LAW, or 'A' for A-LAW
If the file doesn't have a recognizable type, it returns None.
If the file can't be opened, OSError is raised.
To compute the total time, divide the number of frames by the
sampling rate (a frame contains a sample for each channel).
Function what() calls whathdr(). (It used to also use some
heuristics for raw data, but this doesn't work very well.)
Finally, the function test() is a simple main program that calls
what() for all files mentioned on the argument list. For directory
arguments it calls what() for all files in that directory. Default
argument is "." (testing all files in the current directory). The
option -r tells it to recurse down directories found inside
explicitly given directories.
whatwhathdr )
namedtuple
SndHeadersz.filetype framerate nchannels nframes sampwidthzThe value for type indicates the data type
and will be one of the strings 'aifc', 'aiff', 'au','hcom',
'sndr', 'sndt', 'voc', 'wav', '8svx', 'sb', 'ub', or 'ul'.zYThe sampling_rate will be either the actual
value or 0 if unknown or difficult to decode.z^The number of channels or 0 if it cannot be
determined or if the value is difficult to decode.z?The value for frames will be either the number
of frames or -1.zAEither the sample size in bits or
'A' for A-LAW or 'U' for u-LAW.c C s t | }|S )z Guess the type of a sound file.)r )filenameres r /usr/lib64/python3.8/sndhdr.pyr 4 s c
C s^ t | dJ}|d}tD ]*}|||}|rt| W 5 Q R S qW 5 Q R dS Q R X dS )zRecognize sound headers.rbi N)openreadtestsr )r fhZtfr r r r r : s
c C s dd l }| dsd S | dd dkr,d}n| dd dkrBd}nd S |d z||d }W n t|jfk
r| Y d S X || | | d| fS )
Nr FORM s AIFCaifcs AIFFZaiffr)
r
startswithseekr EOFErrorError getframerate getnchannels
getnframes getsampwidth)r r r Zfmtar r r test_aifcK s"
r c
C s | drt}n| d d dkr&t}nd S d}|| dd }|| dd }|| dd }|| dd }|| dd }d
} |d
krd }
n$|d krd}
n|d
krd}
d } nd}
| | } | r|| } nd} |||| |
fS )Ns .snd )s ds.s dns.Zaur r U ?)r get_long_be get_long_le)
r r funcfiletypeZhdr_size data_sizeencodingrate nchannelsZ sample_sizeZ sample_bitsZ
frame_sizeZnframer r r test_au` s2
r1 c C sT | dd dks | dd dkr$d S t | dd }|rBd | }nd
}d |d d
dfS )NA E s FSSD s HCOM i"V r Zhcomr# r( r )r) )r r Zdivisorr/ r r r test_hcom s
r8 c C st | dsd S t| dd }d}d| kr6dk rfn n,| | dkrfd| |d }|rftd | }d
|dd d fS )
Ns Creative Voice Filer! r i r# r g .AZvocr( r )r get_short_leint)r r Zsbseekr/ Zratecoder r r test_voc s
$ r= c C s dd l }| dr2| dd dks2| dd dkr6d S |d z||d}W n t|jfk
rl Y d S X d | | | d| fS )
Nr s RIFFr r s WAVEr s fmt r Zwav)
waver r r r r r r r r )r r r> wr r r test_wav s *
r@ c C s" | dr| dd dkr d S dS )Nr r r s 8SVX)Z8svxr r# r r )r )r r r r r test_8svx s rA c C s< | dr8t| dd }t| dd }d|d|dfS d S )Ns SOUNDr r r! r9 Zsndtr# )r r* r; )r r Znsamplesr/ r r r test_sndt s
rB c C sD | dr@t| dd }d| kr.dkr@n nd|ddd fS d S )
Ns r% r i ia Zsndrr# r( r )r r; )r r r/ r r r test_sndr s
rC c C s, | d d> | d d> B | d d> B | d B S )Nr r" r# r r% r r& r br r r r) s r) c C s, | d d> | d d> B | d d> B | d B S )Nr& r" r% r r# r r r rD r r r r* s r* c C s | d d> | d B S )Nr r r# r rD r r r get_short_be s rF c C s | d d> | d B S )Nr# r r r rD r r r r; s r; c C s dd l } d}| jdd r8| jd dkr8| jdd= d}z8| jdd r`t| jdd |d ntdg|d W n* tk
r | jd | d Y nX d S )Nr r# z-rr% .z
[Interrupted]
)sysargvtestallKeyboardInterruptstderrwriteexit)rH recursiver r r test s rP c C s dd l }dd l}| D ]}|j|r~t|d dd |s<|rttd dd l}||j||d}t||d qtd qt|d dd |j
ztt | W q t k
r td Y qX qd S )
Nr z/: )endzrecursing down:*z*** directory (use -r) ***:z*** not found ***)
rH ospathisdirprintglobjoinescaperJ stdoutflushr OSError)listrO ZtoplevelrH rU r rY namesr r r rJ s"
rJ __main__N) __doc____all__ collectionsr r r, Z framerater0 ZnframesZ sampwidthr r r
r appendr1 r8 r= r@ rA rB rC r) r* rF r; rP rJ __name__r r r r <module> sJ