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aifc.cpython-39.opt-2.pyc
a DOg] @ s^ d dl Z d dlZd dlZddgZG dd deZdZdd Zdd Zd d Z d d Z dd Z dZ dd Z dd Zdd Zdd Zdd Zdd Zd d Zd d lmZ d d lmZ ed!d"Zd#ej_d$ej_d%ej _d&ej _d'ej _d(ej _G d)d* d*Z G d+d, d,Z!d>d-dZ"e#d.krZd dl$Z$e$j%d/d s>e$j%&d0 e$j%d/ Z'e"e'd1Z(e)d2e' e)d3e(* e)d4e(+ e)d5e(, e)d6e(- e)d7e(. e)d8e(/ e$j%d9d r:e$j%d9 Z0e)d:e0 e"e0d;@Z1e12e(3 e(4d<Z5e5sqe16e5 qW d n1 s(0 Y e)d= W d n1 sP0 Y dS )? NErroropenc @ s e Zd ZdS )r N)__name__ __module__ __qualname__ r r /usr/lib64/python3.9/aifc.pyr s l @Q E c C s8 zt d| dd W S t jy2 td Y n0 d S )N>l r structunpackreaderrorEOFErrorfiler r r _read_long s r c C s8 zt d| dd W S t jy2 td Y n0 d S )N>Lr r r r r r r _read_ulong s r c C s8 zt d| dd W S t jy2 td Y n0 d S )N>h r r r r r r _read_short s r c C s8 zt d| dd W S t jy2 td Y n0 d S )N>Hr r r r r r r _read_ushort s r c C s@ t | d}|dkr d}n | |}|d@ dkr<| d}|S )N r )ordr )r lengthdatadummyr r r _read_string s r! gc C s t | }d}|dk r d}|d }t| }t| }|| krN| krNdkrXn nd} n0|dkrft} n"|d }|d | td |d } || S ) Nr r g i? l g @? )r r _HUGE_VALpow)fexponsignhimantlomantr r r _read_float s "r- c C s | td| d S )Nr writer packr( xr r r _write_short s r3 c C s | td| d S )Nr r. r1 r r r _write_ushort s r4 c C s | td| d S )Nr r. r1 r r r _write_long s r5 c C s | td| d S )Nr r. r1 r r r _write_ulong s r6 c C sR t |dkrtd| tdt | | | t |d@ dkrN| d d S )N z%string exceeds maximum pstring lengthBr r )len ValueErrorr/ r r0 )r( sr r r _write_string s r= c C s dd l }|dk r d}|d }nd}|dkr8d}d}d}n||\}}|dks^|dks^||krp|dB }d}d}nh|d }|dk r|||}d}||B }||d}||}t|}||| d}||}t|}t| | t| | t| | d S ) Nr r# r" i @ r r$ i? )mathfrexpldexpfloorintr4 r6 ) r( r2 r? r* r) r+ r, ZfmantZfsmantr r r _write_float s8 rD )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 @ s e Zd ZdZdd Zdd Zdd Zdd Zd d Zd d Z dd Z dd Z dd Z dd Z dd Zdd Zdd Zd d Zd d Zd d! Zd"d# Zd$d% Zd&d' Zd(d) Zd*d+ Zd,d- Zd.d/ Zd0d1 ZdS )2 Aifc_readNc C s6 d| _ d | _g | _d| _|| _t|}| dkr:td|d}|dkrTd| _ n|dkrdd| _ ntdd| _ d | _ d| _ zt| j}W n t y Y qY n0 | }|d kr| | d| _ nH|d kr|| _ |d }d| _ n(|d krt|| _ n|d kr| | | qx| j r*| j s2tdd S )Nr FORMz file does not start with FORM idr AIFF AIFCr znot an AIFF or AIFF-C file COMM SSND FVER MARKz$COMM chunk and/or SSND chunk missing)_version_convert_markers _soundpos_filerE Zgetnamer r _aifcZ_comm_chunk_read _ssnd_chunk_ssnd_seek_neededr _read_comm_chunkr _readmarkskip)selfr chunkZformdataZ chunknamer r r r initfp4 sH zAifc_read.initfpc C sL t |tr>t|d}z| | W qH | Y qH0 n | | d S )Nrb) isinstancestrbuiltinsr r^ closer\ r( Z file_objectr r r __init__\ s zAifc_read.__init__c C s | S Nr r\ r r r __enter__h s zAifc_read.__enter__c G s | d S rf rc r\ argsr r r __exit__k s zAifc_read.__exit__c C s | j S rf )rU rg r r r getfpq s zAifc_read.getfpc C s d| _ d| _d S )Nr r )rX rT rg r r r rewindt s zAifc_read.rewindc C s | j }|d ur d | _ | d S rf )rU rc r\ r r r r rc x s zAifc_read.closec C s | j S rf )rT rg r r r tell~ s zAifc_read.tellc C s | j S rf ) _nchannelsrg r r r getnchannels s zAifc_read.getnchannelsc C s | j S rf )_nframesrg r r r getnframes s zAifc_read.getnframesc C s | j S rf ) _sampwidthrg r r r getsampwidth s zAifc_read.getsampwidthc C s | j S rf ) _frameraterg r r r getframerate s zAifc_read.getframeratec C s | j S rf _comptyperg r r r getcomptype s zAifc_read.getcomptypec C s | j S rf _compnamerg r r r getcompname s zAifc_read.getcompnamec C s* t | | | | | | S rf )rG rr rv rx rt r{ r~ rg r r r getparams s zAifc_read.getparamsc C s t | jdkrd S | jS Nr r: rS rg r r r getmarkers s zAifc_read.getmarkersc C s2 | j D ]}||d kr| S qtd|d S Nr zmarker {0!r} does not existrS r formatr\ idmarkerr r r getmark s zAifc_read.getmarkc C s* |dk s|| j krtd|| _d| _d S )Nr zposition not in ranger )rs r rT rX )r\ posr r r setpos s zAifc_read.setposc C s | j rD| jd | jd}| j| j }|r>| j|d d| _ |dkrPdS | j|| j }| jrv|rv| |}| jt|| j| j | _|S )Nr rN r ) rX rW seekr rT _framesizerR r: rq ru )r\ nframesr r r r r r readframes s zAifc_read.readframesc C s dd l }||dS Nr r )audioopZalaw2linr\ r r r r r _alaw2lin s zAifc_read._alaw2linc C s dd l }||dS r )r Zulaw2linr r r r _ulaw2lin s zAifc_read._ulaw2linc C s2 dd l }t| dsd | _||d| j\}| _|S Nr _adpcmstater )r hasattrr Z adpcm2linr r r r _adpcm2lin s zAifc_read._adpcm2linc C sV t || _t|| _t |d d | _tt|| _| jdkrFtd| jdkrXtd| j| j | _ | j rFd}|j dkrd}t d d |_ |d | _|rt|jd}|d@ dkr|d }|j | |_ |jd d t|| _| jd krR| jd kr | j| _n4| jdv r | j| _n | jdv r6| j| _ntdd| _n d | _d| _d S )N rN r bad sample widthbad # of channels r z Warning: bad COMM chunk size r r" NONE G722 ulaw ULAW alaw ALAW unsupported compression typer not compressed)r rq r rs ru rC r- rw r r rV chunksizewarningswarnr rz r r r r! r} r rR r r )r\ r] Zkludger r r r rY sD zAifc_read._read_comm_chunkc C s t |}zDt|D ]6}t |}t|}t|}|s6|r| j|||f qW nB ty dt| jt| jdkrvdnd|f }t | Y n0 d S )Nz;Warning: MARK chunk contains only %s marker%s instead of %sr r< ) r ranger r! rS appendr r: r r )r\ r] Znmarkersir r namewr r r rZ s zAifc_read._readmark) r r r rU r^ re rh rl rm rn rc rp rr rt rv rx r{ r~ r r r r r r r r rY rZ r r r r rH s2 $( *rH c @ s0 e Zd ZdZdd Zdd Zdd Zdd Zd d Zd d Z dd Z dd Z dd Z dd Z dd Zdd Zdd Zd d Zd d Zd d! Zd"d# Zd$d% Zd&d' Zd(d) Zd*d+ Zd,d- Zd.d/ Zd0d1 Zd2d3 Z d4d5 Z d6d7 Z d8d9 Z d:d; Z d<d= Z!d>d? Z"d@dA Z#dBdC Z$dDdE Z%dFdG Z&dHdI Z'dS )J Aifc_writeNc C s\ t |trNt|d}z| | W n | Y n0 |drXd| _n | | d S )Nwbz.aiffr )r` ra rb r r^ rc endswithrV rd r r r re / s zAifc_write.__init__c C s^ || _ t| _d| _d| _d | _d| _d| _d| _d| _ d| _ d| _ d| _ g | _ d| _d| _d S )Nr r r r )rU _AIFC_versionrQ rz r} rR rq ru rw rs _nframeswritten _datawritten _datalengthrS _marklengthrV ro r r r r^ ? s zAifc_write.initfpc C s | d S rf ri rg r r r __del__P s zAifc_write.__del__c C s | S rf r rg r r r rh S s zAifc_write.__enter__c G s | d S rf ri rj r r r rl V s zAifc_write.__exit__c C s | j rtdd| _d S )N0cannot change parameters after starting to writer r r rV rg r r r aiff\ s zAifc_write.aiffc C s | j rtdd| _d S )Nr r r rg r r r aifca s zAifc_write.aifcc C s( | j rtd|dk r td|| _d S )Nr r r )r r rq )r\ nchannelsr r r setnchannelsf s zAifc_write.setnchannelsc C s | j std| j S )Nznumber of channels not set)rq r rg r r r rr m s zAifc_write.getnchannelsc C s0 | j rtd|dk s |dkr&td|| _d S )Nr r r r )r r ru )r\ sampwidthr r r setsampwidthr s zAifc_write.setsampwidthc C s | j std| j S )Nzsample width not set)ru r rg r r r rv y s zAifc_write.getsampwidthc C s( | j rtd|dkr td|| _d S )Nr r zbad frame rate)r r rw )r\ framerater r r setframerate~ s zAifc_write.setframeratec C s | j std| j S )Nzframe rate not set)rw r rg r r r rx s zAifc_write.getframeratec C s | j rtd|| _d S )Nr )r r rs )r\ r r r r setnframes s zAifc_write.setnframesc C s | j S rf r rg r r r rt s zAifc_write.getnframesc C s. | j rtd|dvr td|| _|| _d S Nr )r r r r r r r )r r rz r} )r\ comptypecompnamer r r setcomptype s zAifc_write.setcomptypec C s | j S rf ry rg r r r r{ s zAifc_write.getcomptypec C s | j S rf r| rg r r r r~ s zAifc_write.getcompnamec C sf |\}}}}}}| j r td|dvr.td| | | | | | | | | || d S r )r r r r r r r )r\ paramsr r r r r r r r r setparams s zAifc_write.setparamsc C s8 | j r| jr| jstdt| j | j| j| j| j| jS )Nznot all parameters set)rq ru rw r rG rs rz r} rg r r r r s zAifc_write.getparamsc C s |dkrt d|dk r t dt|ts2t dtt| jD ],}|| j| d kr@|||f| j|< d S q@| j|||f d S )Nr zmarker ID must be > 0z marker position must be >= 0zmarker name must be bytes)r r` bytesr r: rS r )r\ r r r r r r r setmark s zAifc_write.setmarkc C s2 | j D ]}||d kr| S qtd|d S r r r r r r r s zAifc_write.getmarkc C s t | jdkrd S | jS r r rg r r r r s zAifc_write.getmarkersc C s | j S rf r rg r r r rp s zAifc_write.tellc C sz t |ttfs t|d}| t| t|| j| j }| j rN| |}| j | | j | | _ | j t| | _ d S )Nr8 )r` r bytearray memoryviewcast_ensure_header_writtenr: ru rq rR rU r/ r r )r\ r r r r r writeframesraw s zAifc_write.writeframesrawc C s. | | | j| jks"| j| jkr*| d S rf )r r rs r r _patchheader)r\ r r r r writeframes s zAifc_write.writeframesc C s | j d u rd S zx| d | jd@ r<| j d | jd | _| | j| jksb| j| jksb| jrj| W d | _ | j }d | _ | n d | _ | j }d | _ | 0 d S )Nr r r9 ) rU r r r/ _writemarkersr rs r r r rR rc )r\ r( r r r rc s, zAifc_write.closec C s dd l }||dS r )r Zlin2alawr r r r _lin2alaw s zAifc_write._lin2alawc C s dd l }||dS r )r Zlin2ulawr r r r _lin2ulaw s zAifc_write._lin2ulawc C s2 dd l }t| dsd | _||d| j\}| _|S r )r r r Z lin2adpcmr r r r _lin2adpcm s zAifc_write._lin2adpcmc C sf | j sb| jdv r.| js d| _| jdkr.td| js<td| jsJtd| jsXtd| | d S )Nr r r r r r zRsample width must be 2 when compressing with ulaw/ULAW, alaw/ALAW or G7.22 (ADPCM)z# channels not specifiedzsample width not specifiedzsampling rate not specified)r rz ru r rq rw _write_header)r\ Zdatasizer r r r s z!Aifc_write._ensure_header_writtenc C s> | j dkr| j| _n&| j dv r(| j| _n| j dv r:| j| _d S )Nr r r )rz r rR r r rg r r r _init_compression s z Aifc_write._init_compressionc C sH | j r| jdkr| | jd | js<|| j| j | _| j| j | j | _| jd@ rf| jd | _| j r| jdv r| jd | _| jd@ r| jd | _n0| jdkr| jd d | _| jd@ r| jd | _z| j | _ W n t t fy d | _ Y n0 | | j}| j r@| jd | jd t| jd t| j| j n | jd | jd t| j| t| j| j | j d ur| j | _t| j| j | jd v rt| jd nt| j| jd t| j| j | j r| j| j t| j| j | jd | j d ur| j | _t| j| jd t| jd t| jd d S )Nr rI r )r r r r r r r rK rO rJ rL r rN rM r )rV rz r rU r/ rs rq ru r rp _form_length_posAttributeErrorOSError_write_form_lengthr6 rQ r3 _nframes_posrD rw r= r} _ssnd_length_pos)r\ Z initlength commlengthr r r r % s^ zAifc_write._write_headerc C s\ | j r*dt| j }|d@ r$|d }d}nd}d}t| jd| | j d | d | |S ) Nr r r r r rN )rV r: r} r6 rU r )r\ datalengthr Z verslengthr r r r X s" z Aifc_write._write_form_lengthc C s | j }| jd@ r,| jd }| j d n| j}|| jkrd| j| jkrd| jdkrd| j |d d S | j | j d | |}| j | j d t | j | j | j | j d t | j |d | j |d | j| _|| _d S )Nr r9 r rN )rU rp r r/ r rs r r r r r r r6 r )r\ Zcurposr r r r r r e s* zAifc_write._patchheaderc C s t | jdkrd S | jd d}| jD ]:}|\}}}|t | d d }t |d@ dkr(|d }q(t| j| |d | _t| jt | j | jD ]2}|\}}}t| j| t| j| t| j| qd S )Nr rP r r rN )r: rS rU r/ r6 r r3 r= )r\ r r r r r r r r r { s" zAifc_write._writemarkers)(r r r rU re r^ r rh rl r r r rr r rv r rx r rt r r{ r~ r r r r r rp r r rc r r r r r r r r r r r r r r sJ 3 r c C sJ |d u r t | dr| j}nd}|dv r.t| S |dv r>t| S tdd S )Nmoder_ )rr_ )r r z$mode must be 'r', 'rb', 'w', or 'wb')r r rH r r )r( r r r r r s __main__r z /usr/demos/data/audio/bach.aiffr ZReadingz nchannels =z nframes =z sampwidth =z framerate =z comptype =z compname =r ZWritingr i zDone.)N)7r rb r __all__ Exceptionr r r r r r r! r& r- r3 r4 r5 r6 r= rD r] rE collectionsrF rG r __doc__r r r r r rH r r r sysargvr fnr( printrr rt rv rx r{ r~ Zgngr r r r r r r r r <module> sx ! .