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rT rh r r r � getmarkers� s zAifc_read.getmarkersc C s2 | j D ]}||d kr| S qtd�|���d S �Nr zmarker {0!r} does not exist�rT r �format�r] �id�markerr r r �getmark� s zAifc_read.getmarkc C s* |dk s|| j krtd��|| _d| _d S )Nr zposition not in ranger )rt r rU rY )r] �posr r r �setpos� s zAifc_read.setposc C s� | j rD| j�d� | j�d�}| j| j }|r>| j�|d � d| _ |dkrPdS | j�|| j �}| jrv|rv| �|�}| jt|�| j| j | _|S )Nr rO r ) rY rX �seekr rU � _framesizerS r; rr rv )r] �nframesr! r� r r r r � readframes� s � zAifc_read.readframesc C s dd l }|�|d�S �Nr r )�audioopZalaw2lin�r] r r� r r r � _alaw2lin� s zAifc_read._alaw2linc C s dd l }|�|d�S r� )r� Zulaw2linr� r r r � _ulaw2lin� s zAifc_read._ulaw2linc C s2 dd l }t| d�sd | _|�|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 dkr�d}t � d� d |_ |�d �| _|r�t|j�d��}|d@ dkr�|d }|j | |_ |j�d d� t|�| _| jd k�rR| jd k�r | j| _n4| jdk�r | j| _n | jdk�r6| j| _ntd��d| _n d | _d| _d S )N� rO 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 rr r rt rv rD r. rx r r� rW � chunksize�warnings�warnr r{ r r r� r" r~ r� rS r� r� )r] r^ Zkludger r r r rZ � sD zAifc_read._read_comm_chunkc C s� t |�}zDt|�D ]6}t |�}t|�}t|�}|s6|r| j�|||f� qW nD tk r� dt| j�t| j�dkrxdnd|f }t� |� Y nX d S )Nz;Warning: MARK chunk contains only %s marker%s instead of %sr � r= ) r �ranger r" rT �appendr r; r� r� )r] r^ Znmarkers�ir� r� �name�wr r r r[ � s ��zAifc_read._readmark) r r r rV r_ rf ri rm rn ro rd rq rs ru rw ry r| r r� r� r� r� r� r� r� r� rZ r[ r r r r rI s2 $( *rI c @ s0 e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� Zdd� Zd d � Zd d � Zd d!� Zd"d#� Zd$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�rNt�|d�}z| �|� W n |�� � Y nX |�d�rXd| _n | �|� d S )N�wbz.aiffr )ra rb rc r r_ rd �endswithrW re r r r rf / 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 )rV � _AIFC_versionrR r{ r~ rS rr rv rx rt �_nframeswritten� _datawritten� _datalengthrT � _marklengthrW rp r r r r_ ? s zAifc_write.initfpc C s | � � d S rg rj rh r r r �__del__P s zAifc_write.__del__c C s | S rg r rh r r r ri S s zAifc_write.__enter__c G s | � � d S rg rj rk r r r rm V s zAifc_write.__exit__c C s | j rtd��d| _d S )N�0cannot change parameters after starting to writer �r� r rW rh r r r �aiff\ s zAifc_write.aiffc C s | j rtd��d| _d S )Nr� r r� rh r r r �aifca s zAifc_write.aifcc C s( | j rtd��|dk r td��|| _d S )Nr� r r� )r� r rr )r] � nchannelsr r r � setnchannelsf s zAifc_write.setnchannelsc C s | j std��| j S )Nznumber of channels not set)rr r rh r r r rs m s zAifc_write.getnchannelsc C s0 | j rtd��|dk s |dkr&td��|| _d S )Nr� r r r� )r� r rv )r] � sampwidthr r r � setsampwidthr s zAifc_write.setsampwidthc C s | j std��| j S )Nzsample width not set)rv r rh r r r rw y s zAifc_write.getsampwidthc C s( | j rtd��|dkr td��|| _d S )Nr� r zbad frame rate)r� r rx )r] � framerater r r � setframerate~ s zAifc_write.setframeratec C s | j std��| j S )Nzframe rate not set)rx r rh r r r ry � s zAifc_write.getframeratec C s | j rtd��|| _d S )Nr� )r� r rt )r] r� r r r � setnframes� s zAifc_write.setnframesc C s | j S rg �r� rh r r r ru � s zAifc_write.getnframesc C s. | j rtd��|dkr td��|| _|| _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 s | j S rg rz rh r r r r| � s zAifc_write.getcomptypec C s | j S rg r} rh r r r r � s zAifc_write.getcompnamec C sf |\}}}}}}| j r td��|dkr.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| jstd��t| j | j| j| j| j| j�S )Nznot all parameters set)rr rv rx r rH rt r{ r~ rh r r r r� � s �zAifc_write.getparamsc C s� |dkrt d��|dk r t d��t|t�s2t d��tt| j��D ],}|| 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 ra �bytesr� r; rT 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 | j�dkrd S | jS r� r� rh r r r r� � s zAifc_write.getmarkersc C s | j S rg r� rh r r r rq � s zAifc_write.tellc C sz t |ttf�s t|��d�}| �t|�� t|�| j| j }| j rN| � |�}| j � |� | j | | _ | j t|� | _ d S )Nr9 )ra r� � bytearray� memoryview�cast�_ensure_header_writtenr; rv rr rS rV r0 r� r� )r] r r� r r r �writeframesraw� s zAifc_write.writeframesrawc C s. | � |� | j| jks"| j| jkr*| �� d S rg )r� r� rt r� r� � _patchheader)r] r r r r � writeframes� s �zAifc_write.writeframesc C s� | j d krd S z^| �d� | jd@ r<| j �d� | jd | _| �� | j| jksb| j | jksb| j rj| � � W 5 d | _| j }d | _ |�� X d S )Nr r r: ) rV rS rd r� r� r0 � _writemarkersr� rt r� r� r� )r] r) r r r rd � s$ �� zAifc_write.closec C s dd l }|�|d�S r� )r� Zlin2alawr� r r r � _lin2alaw� s zAifc_write._lin2alawc C s dd l }|�|d�S r� )r� Zlin2ulawr� r r r � _lin2ulaw s zAifc_write._lin2ulawc C s2 dd l }t| d�sd | _|�|d| j�\}| _|S r� )r� r� r� Z lin2adpcmr� r r r � _lin2adpcm s zAifc_write._lin2adpcmc C sf | j sb| jdkr.| js d| _| jdkr.td��| js<td��| jsJtd��| jsXtd��| �|� 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{ rv r rr rx � _write_header)r] Zdatasizer r r r� s z!Aifc_write._ensure_header_writtenc C s> | j dkr| j| _n&| j dkr(| j| _n| j dkr:| j| _d S )Nr� r� r� )r{ r� rS r� r� rh r r r �_init_compression s z Aifc_write._init_compressionc C sJ | j r| jdkr| �� | j�d� | js<|| j| j | _| j| j | j | _| jd@ rf| jd | _| j r�| jdkr�| jd | _| jd@ r�| jd | _n0| jdkr�| jd d | _| jd@ r�| jd | _z| j� � | _ W n t t fk r� d | _ Y nX | � | j�}| j �rB| j�d � | j�d � t| jd� t| j| j� n | j�d � | j�d � t| j|� t| j| j� | j d k �r�| j� � | _t| j| j� | jd k�r�t| jd� nt| j| jd � t| j| j� | j �r�| j�| j� t| j| j� | j�d� | j d k �r | j� � | _t| j| jd � t| jd� t| jd� d S )Nr� rJ r )r� r� r� r� r r� � r rL rP rK rM r� rO rN r )rW r{ r� rV r0 rt rr rv r� rq �_form_length_pos�AttributeError�OSError�_write_form_lengthr7 rR r4 � _nframes_posrE rx 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$|d }d}nd}d}t| jd| | j d | d | � |S ) Nr� r � r� r r rO � )rW r; r~ r7 rV r� )r] � datalengthr� Z verslengthr r r r� X s" ����z Aifc_write._write_form_lengthc C s� | j �� }| jd@ r,| jd }| j �d� n| j}|| jkrd| j| jkrd| jdkrd| j �|d� d S | j �| j d� | � |�}| j �| j d� t | j | j� | j �| j d� t | j |d � | j �|d� | j| _|| _d S )Nr r: r rO )rV rq r� r0 r� rt r� r� r� r� r� r� r7 r� )r] Zcurposr� r! r r r r� e s* �� zAifc_write._patchheaderc C s� t | j�dkrd S | j�d� d}| jD ]:}|\}}}|t |� d d }t |�d@ dkr(|d }q(t| j|� |d | _t| jt | j�� | jD ]2}|\}}}t| j|� t| j|� t| j|� q�d S )Nr rQ r r � rO )r; rT rV r0 r7 r� r4 r> )r] r r� r� r� r� r r r r� { s" zAifc_write._writemarkers)(r r r rV rf r_ r� ri rm r� r� r� rs r� rw r� ry r� ru r� r| r r� r� r� r� r� rq r� r� rd r� r� r� r� r� r� r� r� r� r r r r r� sJ 3 r� c C sJ |d kr t | d�r| j}nd}|dkr.t| �S |dkr>t| �S td��d S )N�moder` )�rr` )r� r� z$mode must be 'r', 'rb', 'w', or 'wb')r� r� rI r� r �r) r� r r r r � s c C s t jdtdd� t| |d�S )NzBaifc.openfp is deprecated since Python 3.7. Use aifc.open instead.r )� stacklevel)r� )r� r� �DeprecationWarningr 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)N)8r rc r� �__all__� Exceptionr r� r r r r r" r' r. r4 r5 r6 r7 r> rE r^ rF � collectionsrG rH r� �__doc__r� r� r� r� r� rI r� r r r �sys�argvr� �fnr) �printrs ru rw ry r| r Zgn�gr� r� r� r r� r r r r �<module>� sz ! �
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