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aifc.cpython-310.opt-2.pyc
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}t| �}t| �}|| kr'| kr'dkr/n nd} || S |dkr9t} || S |d }|d | td |d � } || S ) Nr r ���� � g � i�? l g @�? )r r � _HUGE_VAL�pow)�f�expon�sign�himant�lomantr r r � _read_float� s "��r. c C � | � t�d|�� d S )Nr ��writer �pack�r) �xr r r � _write_short� � r5 c C r/ )Nr r0 r3 r r r � _write_ushort� r6 r7 c C r/ )Nr r0 r3 r r r � _write_long� r6 r8 c C r/ )Nr r0 r3 r r r � _write_ulong� r6 r9 c C sV t |�dkr td��| �t�dt |��� | �|� t |�d@ dkr)| �d� d S d S )N� z%string exceeds maximum pstring length�Br r � )�len� ValueErrorr1 r r2 )r) �sr r r � _write_string� s �r@ c C s� dd l }|dk rd}|d }nd}|dkr d}d}d}nP|�|�\}}|dks/|dks/||kr8|dB }d}d}n4|d }|dk rH|�||�}d}||B }|�|d�}|�|�}t|�}|�|| d�}|�|�}t|�}t| |� t| |� t| |� d S ) Nr r$ r# i @ r r% i�? � )�mathZfrexpZldexpZfloor�intr7 r9 ) r) r4 rB 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$d%� Zd&d'� Zd(d)� Zd*d+� Zd,d-� Zd.d/� Zd0d1� ZdS )2� Aifc_readNc C s, d| _ d | _g | _d| _|| _t|�}|�� dkr td��|�d�}|dkr*d| _ n |dkr2d| _ ntd��d| _ d | _ d| _ zt| j�}W n t yP Y n:w |�� }|d krb| �|� d| _ n#|d krr|| _ |�d �}d| _ n|d kr|t|�| _ n |d kr�| �|� |�� q=| j r�| j s�td��d S )Nr � FORMz file does not start with FORM idr � AIFF� AIFCr znot an AIFF or AIFF-C file� COMM� SSND� � FVER� MARKz$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 � _readmark�skip)�selfr �chunkZformdataZ chunknamer! r r r �initfp4 sP � � �zAifc_read.initfpc C sF t |t�r t�|d�}z| �|� W d S |�� � | �|� d S )N�rb)� isinstance�str�builtinsr r^ �close�r\ r) Z file_objectr r r �__init__\ s zAifc_read.__init__c C � | S �Nr �r\ r r r � __enter__h � zAifc_read.__enter__c G � | � � d S rg �rc �r\ �argsr r r �__exit__k � zAifc_read.__exit__c C � | j S rg )rU rh r r r �getfpq � zAifc_read.getfpc C s d| _ d| _d S )Nr r )rX rT rh r r r �rewindt s zAifc_read.rewindc C s$ | j }|d urd | _ |�� d S d S rg )rU rc �r\ r r r r rc x s �zAifc_read.closec C rq rg )rT rh r r r �tell~ rs zAifc_read.tellc C rq rg )� _nchannelsrh r r r � getnchannels� rs zAifc_read.getnchannelsc C rq rg )�_nframesrh r r r � getnframes� rs zAifc_read.getnframesc C rq rg )� _sampwidthrh r r r � getsampwidth� rs zAifc_read.getsampwidthc C rq rg )� _frameraterh r r r � getframerate� rs zAifc_read.getframeratec C rq rg �� _comptyperh r r r � getcomptype� rs zAifc_read.getcomptypec C rq rg �� _compnamerh r r r � getcompname� rs zAifc_read.getcompnamec C s* t | �� | �� | �� | �� | �� | �� �S rg )rG rx r| r~ rz r� r� rh r r r � getparams� s �zAifc_read.getparamsc C � t | j�dkr d S | jS �Nr �r= rS rh r r r � getmarkers� � zAifc_read.getmarkersc C �. | j D ] }||d kr| S qtd�|����Nr zmarker {0!r} does not exist�rS r �format�r\ �id�markerr r r �getmark� � �zAifc_read.getmarkc C s* |dk s || j kr td��|| _d| _d S )Nr zposition not in ranger )ry r rT rX )r\ �posr r r �setpos� s zAifc_read.setposc C s� | j r"| j�d� | j�d�}| j| j }|r | j�|d � d| _ |dkr(dS | j�|| j �}| jr;|r;| �|�}| jt|�| j| j | _|S )Nr rN r ) rX rW �seekr rT � _framesizerR r= rw r{ )r\ �nframesr! r� r r r r � readframes� s �zAifc_read.readframesc C � dd l }|�|d�S �Nr r )�audioopZalaw2lin�r\ r r� r r r � _alaw2lin� � zAifc_read._alaw2linc C r� r� )r� Zulaw2linr� r r r � _ulaw2lin� r� zAifc_read._ulaw2linc C �2 dd l }t| d�s d | _|�|d| j�\}| _|S �Nr � _adpcmstater )r� �hasattrr� Z adpcm2linr� r r r � _adpcm2lin� s zAifc_read._adpcm2linc C sR t |�| _t|�| _t |�d d | _tt|��| _| jdkr#td��| jdkr,td��| j| j | _ | j r�d}|j dkrGd}t � d� d |_ |�d �| _|rnt|j�d��}|d@ dkra|d }|j | |_ |j�d d� t|�| _| jd kr�| jd kr�| j| _n| jdv r�| j| _n| jdv r�| j| _ntd��d| _d S d S d | _d| _d S )N� rN r �bad sample width�bad # of channels� r z Warning: bad COMM chunk size� r r# � NONE� G722�� ulaw� ULAW�� alaw� ALAW� unsupported compression typer � not compressed)r rw r ry r{ rC r. r} r r� rV Z chunksize�warnings�warnr r� r r r� r" r� r� rR r� r� )r\ r] Zkludger r r r rY � sF � zAifc_read._read_comm_chunkc C s� t |�}z#t|�D ]}t |�}t|�}t|�}|s|r$| j�|||f� q W d S tyI dt| j�t| j�dkr<dnd|f }t� |� Y d S w )Nz;Warning: MARK chunk contains only %s marker%s instead of %sr � r? ) r �ranger r" rS �appendr r= r� r� )r\ r] Znmarkers�ir� r� �name�wr r r rZ � s$ �� ���zAifc_read._readmark) r r r rU r^ re ri ro rr rt rc rv rx rz r| r~ r� r� r� r� r� r� r� r� r� r� rY rZ r r r r rH s4 $( *rH c @ s0 e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� Zdd� Zd d � Zd d � Zd d!� Zd"d#� Zd$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 |t�r't�|d�}z| �|� W n |�� � |�d�r%d| _d S d S | �|� d S )N�wbz.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 r� r� rR rw r{ r} ry �_nframeswritten� _datawritten� _datalengthrS � _marklengthrV ru r r r r^ ? s zAifc_write.initfpc C rk rg rl rh r r r �__del__P rp zAifc_write.__del__c C rf rg r rh r r r ri S rj zAifc_write.__enter__c G rk rg rl rm r r r ro V rp zAifc_write.__exit__c C � | j rtd��d| _d S )N�0cannot change parameters after starting to writer �r� r rV rh r r r �aiff\ � zAifc_write.aiffc C r� )Nr� r r� rh r r r �aifca r� zAifc_write.aifcc C s( | j rtd��|dk rtd��|| _d S )Nr� r r� )r� r rw )r\ � nchannelsr r r � setnchannelsf � zAifc_write.setnchannelsc C � | j std��| j S )Nznumber of channels not set)rw r rh r r r rx m � zAifc_write.getnchannelsc C s0 | j rtd��|dk s|dkrtd��|| _d S )Nr� r r r� )r� r r{ )r\ � sampwidthr r r � setsampwidthr s zAifc_write.setsampwidthc C r� )Nzsample width not set)r{ r rh r r r r| y r� zAifc_write.getsampwidthc C s( | j rtd��|dkrtd��|| _d S )Nr� r zbad frame rate)r� r r} )r\ � framerater r r � setframerate~ r� zAifc_write.setframeratec C r� )Nzframe rate not set)r} r rh r r r r~ � r� zAifc_write.getframeratec C s | j rtd��|| _d S )Nr� )r� r ry )r\ r� r r r � setnframes� r� zAifc_write.setnframesc C rq rg �r� rh r r r rz � rs zAifc_write.getnframesc C s. | j rtd��|dvrtd��|| _|| _d S �Nr� )r� r� r� r� r� r� r� )r� r r� r� )r\ �comptype�compnamer r r � setcomptype� s zAifc_write.setcomptypec C rq rg r rh r r r r� � rs zAifc_write.getcomptypec C rq rg r� rh r r r r� � rs zAifc_write.getcompnamec C sf |\}}}}}}| j rtd��|dvrtd��| �|� | �|� | �|� | �|� | �||� 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 | js td��t| j | j| j| j| j| j�S )Nznot all parameters set)rw r{ r} r rG ry r� r� rh r r r r� � s �zAifc_write.getparamsc C s� |dkrt d��|dk rt d��t|t�st d��tt| j��D ]}|| j| d kr6|||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 r� r� r� r� r r r r� � r� zAifc_write.getmarkc C r� r� r� rh r r r r� � r� zAifc_write.getmarkersc C rq rg r� rh r r r rv � rs zAifc_write.tellc C sz t |ttf�st|��d�}| �t|�� t|�| j| j }| j r'| � |�}| j � |� | j | | _ | j t|� | _ d S )Nr; )r` r� � bytearray� memoryview�cast�_ensure_header_writtenr= r{ rw rR rU r1 r� r� )r\ r r� r r r �writeframesraw� s zAifc_write.writeframesrawc C s2 | � |� | j| jks| j| jkr| �� d S d S rg )r� r� ry r� r� � _patchheader)r\ r r r r � writeframes� s �zAifc_write.writeframesc C s� | j d u rd S zM| �d� | jd@ r | j �d� | jd | _| �� | j| jks1| j| jks1| jrE| � � W d | _ | j }d | _ |� � d S W d | _ | j }d | _ |� � d S d | _ | j }d | _ |� � w )Nr r r< ) rU r� r� r1 � _writemarkersr� ry r� r� r� rR rc )r\ r) r r r rc � s4 � � � zAifc_write.closec C r� r� )r� Zlin2alawr� r r r � _lin2alaw� r� zAifc_write._lin2alawc C r� r� )r� Zlin2ulawr� r r r � _lin2ulaw r� zAifc_write._lin2ulawc C r� r� )r� r� r� Z lin2adpcmr� r r r � _lin2adpcm s zAifc_write._lin2adpcmc C sj | j s3| jdv r| jsd| _| jdkrtd��| js td��| js%td��| js,td��| �|� d S d S )N�r� 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� r� r{ r rw r} � _write_header)r\ Zdatasizer r r r� s �z!Aifc_write._ensure_header_writtenc C sF | j dkr | j| _d S | j dv r| j| _d S | j dv r!| j| _d S d S )Nr� r� r� )r� r� rR r� r� rh r r r �_init_compression s �z Aifc_write._init_compressionc C s@ | j r | jdkr | �� | j�d� | js || j| j | _| j| j | j | _| jd@ r3| jd | _| j re| jdv rM| jd | _| jd@ rL| jd | _n| jdkre| jd d | _| jd@ re| jd | _z| j� � | _ W n t t fy{ d | _ Y nw | � | j�}| j r�| j�d � | j�d � t| jd� t| j| j� n| j�d � | j�d � t| j|� t| j| j� | j d ur�| j� � | _t| j| j� | jd v r�t| jd� n t| j| jd � t| j| j� | j r�| j�| j� t| j| j� | j�d� | j d u�r | 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 r� r� rU r1 ry rw r{ r� rv �_form_length_pos�AttributeError�OSError�_write_form_lengthr9 rQ r5 � _nframes_posrD r} r@ r� �_ssnd_length_pos)r\ Z initlength� commlengthr r r r� % sb � � zAifc_write._write_headerc C s\ | j rdt| j� }|d@ r|d }d}nd}d}t| jd| | j d | d | � |S ) Nr� r � r� r r rN � )rV r= r� r9 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}|| jkr2| j| jkr2| jdkr2| 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 r< r rN )rU rv r� r1 r� ry r� r� r� r� r� r� r9 r� )r\ Zcurposr� r! r r r r� e s& zAifc_write._patchheaderc C s� t | j�dkr d S | j�d� d}| jD ] }|\}}}|t |� d d }t |�d@ dkr1|d }qt| j|� |d | _t| jt | j�� | jD ]}|\}}}t| j|� t| j|� t| j|� qId S )Nr rP r r � rN )r= rS rU r1 r9 r� r5 r@ )r\ r r� r� r� r� r r r r� { s& � �zAifc_write._writemarkers)(r r r rU re r^ r� ri ro r� r� r� rx r� r| r� r~ r� rz r� r� r� r� r� r� r� r� rv r� r� rc r� r� r� r� r� r� r� r� r� r r r r r� sL 3 r� c C sF |d u rt | d�r | j}nd}|dv rt| �S |dv r t| �S td��)N�moder_ )�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.rg )7r rb r� �__all__� Exceptionr r� r r r r r" r' r. r5 r7 r8 r9 r@ rD r] rE � collectionsrF rG r� �__doc__r� r� r� r� r� rH r� r r �sys�argvr� �fnr) �printrx rz r| r~ r� r� Zgn�gr� r� r� r r� r r r r �<module> s� ! � � � �$��