o
    ãiâ  ã                   @   sˆ   d Z ddlZddlZddlZddlZddlZddlmZ ddlm	Z	 dZ
dZG dd	„ d	eƒZG d
d„ deƒZdd„ ZG dd„ de	ƒZdS )zBUses standard-library modules to read AIFF, AIFF-C, and WAV files.é    Né   )ÚDecodeError)Ú	AudioFileé   )r   r   é   é   c                   @   ó   e Zd ZdZdS )ÚUnsupportedErrorz%File is not an AIFF, WAV, or Au file.N©Ú__name__Ú
__module__Ú__qualname__Ú__doc__© r   r   ú`/var/www/html/eduruby.in/lip-sync/lip-sync-env/lib/python3.10/site-packages/audioread/rawread.pyr	       ó    r	   c                   @   r   )ÚBitWidthErrorz'The file uses an unsupported bit width.Nr
   r   r   r   r   r   $   r   r   c                 C   sl   t | ƒd dks
J ‚g }tdt | ƒdƒD ]}| ||d … }tjdgt d|¡¢R Ž }| |¡ qd |¡S )z¤Swaps the endianness of the bytestring s, which must be an array
    of shorts (16-bit signed integers). This is probably less efficient
    than it should be.
    r   r   z<hz>hó    )ÚlenÚrangeÚstructÚpackÚunpackÚappendÚjoin)ÚsÚpartsÚiÚchunkZnewchunkr   r   r   Úbyteswap(   s   
r   c                   @   sn   e Zd ZdZdd„ Zdd„ Zdd„ Zedd	„ ƒZed
d„ ƒZ	edd„ ƒZ
ddd„Zdd„ Zdd„ Zdd„ ZdS )ÚRawAudioFilez|An AIFF, WAV, or Au file that can be read by the Python standard
    library modules ``wave``, ``aifc``, and ``sunau``.
    c                 C   sî   t |dƒ| _z	t  | j¡| _W n tjy   | j d¡ Y n
w d| _|  ¡  d S z	t  | j¡| _W n tjyB   | j d¡ Y n
w d| _|  ¡  d S z	t	  | j¡| _W n t	jye   | j d¡ Y n
w d| _|  ¡  d S | j 
¡  tƒ ‚)NÚrbr   TF)ÚopenÚ_fhÚaifcÚ_fileÚErrorÚseekÚ_needs_byteswapÚ_checkÚwaveÚsunauÚcloser	   )ÚselfÚfilenamer   r   r   Ú__init__:   s:   þþþ
zRawAudioFile.__init__c                 C   s    | j  ¡ tvr|  ¡  tƒ ‚dS )zeCheck that the files' parameters allow us to decode it and
        raise an error otherwise.
        N)r%   ÚgetsampwidthÚSUPPORTED_WIDTHSr,   r   ©r-   r   r   r   r)   _   s   þzRawAudioFile._checkc                 C   s   | j  ¡  | j ¡  dS )zClose the underlying file.N)r%   r,   r#   r2   r   r   r   r,   g   s   
zRawAudioFile.closec                 C   ó
   | j  ¡ S )zNumber of audio channels.)r%   Zgetnchannelsr2   r   r   r   Úchannelsl   ó   
zRawAudioFile.channelsc                 C   r3   )zSample rate in Hz.)r%   Zgetframerater2   r   r   r   Ú
samplerateq   r5   zRawAudioFile.sampleratec                 C   s   t | j ¡ ƒ| j S )z)Length of the audio in seconds (a float).)Úfloatr%   Z
getnframesr6   r2   r   r   r   Údurationv   s   zRawAudioFile.durationé   c                 c   sT    | j  ¡ }	 | j  |¡}|sdS t ||t¡}| jr&| j  ¡ dkr&t|ƒ}|V  q)z/Generates blocks of PCM data found in the file.TZsowtN)	r%   r0   Z
readframesÚaudioopZlin2linÚTARGET_WIDTHr(   Úgetcomptyper   )r-   Zblock_samplesZ	old_widthÚdatar   r   r   Ú	read_data{   s   €
özRawAudioFile.read_datac                 C   s   | S ©Nr   r2   r   r   r   Ú	__enter__Œ   s   zRawAudioFile.__enter__c                 C   s   |   ¡  dS )NF)r,   )r-   Úexc_typeÚexc_valÚexc_tbr   r   r   Ú__exit__   s   zRawAudioFile.__exit__c                 C   s   |   ¡ S r?   )r>   r2   r   r   r   Ú__iter__”   s   zRawAudioFile.__iter__N)r9   )r   r   r   r   r/   r)   r,   Úpropertyr4   r6   r8   r>   r@   rD   rE   r   r   r   r   r    6   s    %



r    )r   r$   r:   r   r+   r*   Ú
exceptionsr   Úbaser   r;   r1   r	   r   r   r    r   r   r   r   Ú<module>   s   