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aifc.cpython-39.opt-2.pyc
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)N� r � )�ordr )r �length�data�dummyr r r � _read_string� s r! g�����c 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_VAL�pow)�f�expon�sign�himant�lomantr r r � _read_float� s "r- c C s | � t�d|�� d S )Nr ��writer �pack�r( �xr r r � _write_short� s r3 c C s | � t�d|�� d S )Nr r. r1 r r r � _write_ushort� s r4 c C s | � t�d|�� d S )Nr r. r1 r r r � _write_long� s r5 c C s | � t�d|�� d S )Nr r. r1 r r r � _write_ulong� s r6 c C sR t |�dkrtd��| �t�dt |��� | �|� t |�d@ dkrN| �d� d S )N� z%string exceeds maximum pstring length�Br 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�? � )�math�frexp�ldexp�floor�intr4 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$d%� Zd&d'� Zd(d)� Zd*d+� Zd,d-� Zd.d/� Zd0d1� ZdS )2� Aifc_readNc C s6 d| _ d | _g | _d| _|| _t|�}|�� dkr:td��|�d�}|dkrTd| _ n|dkrdd| _ ntd��d| _ d | _ d| _ zt| j�}W n t y� Y �qY n0 |�� }|d kr�| �|� d| _ nH|d kr�|| _ |�d �}d| _ n(|d kr�t|�| _ n|d k�r| �|� |�� qx| j �r*| j �s2td��d S )Nr � FORMz file does not start with FORM idr � AIFF� AIFCr znot an AIFF or AIFF-C file� COMM� SSND� � FVER� MARKz$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 sH zAifc_read.initfpc C sL t |t�r>t�|d�}z| �|� W qH |�� � Y qH0 n | �|� d S )N�rb)� isinstance�str�builtinsr r^ �close�r\ 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 | j�dkrd 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 exist�rS 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 )rs r rT rX )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 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 }|�|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| jdv �r | j| _n | jdv �r6| j| _ntd��d| _n 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 rq r rs ru rC r- rw r r� rV � chunksize�warnings�warnr 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| j�t| j�dkrvdnd|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] Znmarkers�ir� r� �name�wr 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 |t�rNt�|d�}z| �|� W n |�� � Y n0 |�d�rXd| _n | �|� 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 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 rtd��d| _d S )N�0cannot change parameters after starting to writer �r� r rV rg r r r �aiff\ s zAifc_write.aiffc C s | j rtd��d| _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\ �comptype�compnamer 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| jstd��t| j | j| j| j| j| j�S )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 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 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 | j�dkrd 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 |ttf�s t|��d�}| �t|�� t|�| j| j }| j rN| � |�}| j � |� | j | | _ | j t|� | _ d S )Nr8 )r` r� � bytearray� memoryview�cast�_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 }|�|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| jdv r.| 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� 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| �� | j�d� | 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@| j�d � | j�d � t| jd� t| j| j� n | j�d � | j�d � t| j|� t| j| j� | j d u�r�| j� � | _t| j| j� | jd v �r�t| jd� nt| 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 rz r� rU r/ rs rq ru r� rp �_form_length_pos�AttributeError�OSError�_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 | 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 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 | d�r| j}nd}|dv r.t| �S |dv r>t| �S td��d S )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.)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 �sys�argvr� �fnr( �printrr rt rv rx r{ r~ Zgn�gr� r r� r r� r r r r �<module>� sx ! � .
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