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� i fp � @ sZ d Z d d g Z d d � Z d d � Z g Z d d � Z e j e � d d � Z e j e � d d � Z e j e � d d � Z e j e � d d � Z e j e � d d � Z e j e � d d � Z e j e � d d � Z e j e � d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z e d! k rVe � n d" S)#a� Routines to help recognizing sound files. Function whathdr() recognizes various types of sound file headers. It understands almost all headers that SOX can decode. The return tuple contains the following items, in this order: - file type (as SOX understands it) - sampling rate (0 if unknown or hard to decode) - number of channels (0 if unknown or hard to decode) - number of frames in the file (-1 if unknown or hard to decode) - number of bits/sample, or 'U' for U-LAW, or 'A' for A-LAW If the file doesn't have a recognizable type, it returns None. If the file can't be opened, OSError is raised. To compute the total time, divide the number of frames by the sampling rate (a frame contains a sample for each channel). Function what() calls whathdr(). (It used to also use some heuristics for raw data, but this doesn't work very well.) Finally, the function test() is a simple main program that calls what() for all files mentioned on the argument list. For directory arguments it calls what() for all files in that directory. Default argument is "." (testing all files in the current directory). The option -r tells it to recurse down directories found inside explicitly given directories. �what�whathdrc C s t | � } | S)z Guess the type of a sound file.)r )�filename�res� r �+/opt/alt/python34/lib64/python3.4/sndhdr.pyr # s c C sY t | d � �D } | j d � } x' t D] } | | | � } | r( | Sq( Wd SWd QXd S)zRecognize sound headers.�rbi N)�open�read�tests)r �f�hZtfr r r r r ) s c C s� d d l } | j d � s d S| d d � d k r> d } n# | d d � d k r] d } n d S| j d � y | j | d � } Wn t | j f k r� d SYn X| | j � | j � | j � d | j � f S) N� s FORM� � s AIFC�aifcs AIFFZaiff�r) r � startswith�seekr �EOFError�Error� getframerate� getnchannels� getnframes� getsampwidth)r r r Zfmt�ar r r � test_aifc: s r c C s6 | j d � r t } n# | d d � d k r7 t } n d Sd } | | d d � � } | | d d � � } | | d d � � } | | d d � � } | | d d � � } d } | d k r� d } n6 | d k r� d } n! | d k r� d } d } n d } | | } | r | | } n d } | | | | | f S)Ns .snd� � ds.� dns.Zaur r � � � � �U� � �?)r r ���)r � get_long_be� get_long_le) r r �funcZfiletypeZhdr_sizeZ data_size�encoding�rateZ nchannelsZ sample_sizeZ sample_bitsZ frame_sizeZnframer r r �test_auO s2 r- c C sr | d d � d k s, | d d � d k r0 d St | d d � � } | rY d | } n d } d | d d d f S)N�A �E s FSSD� � s HCOM� � i"V r Zhcomr" r r' )r( )r r Zdivisorr, r r r � test_hcomp s , r4 c C s� | j d � s d St | d d � � } d } d | k oF d k n r� | | d k r� d | | d } | r� t d | � } q� n d | d d d f S) Ns Creative Voice Filer � r i� r" � r g ��.AZvocr r' )r � get_short_le�int)r r Zsbseekr, Zratecoder r r �test_voc} s ,r9 c C s� d d l } | j d � sH | d d � d k sH | d d � d k rL d S| j d � y | j | d � } Wn t | j f k r� d SYn Xd | j � | j � | j � d | j � f S) Nr s RIFFr r s WAVEr s fmt r Zwav) �waver r Zopenfpr r r r r r )r r r: �wr r r �test_wav� s < r< c C s. | j d � s& | d d � d k r* d Sd S) Ns FORMr r s 8SVX�8svxr r" )r= r r" r r )r )r r r r r � test_8svx� s &r> c C sR | j d � rN t | d d � � } t | d d � � } d | d | d f Sd S)Ns SOUNDr r r r5 Zsndtr" )r r) r7 )r r Znsamplesr, r r r � test_sndt� s r? c C s[ | j d � rW t | d d � � } d | k o< d k n rW d | d d d f Sn d S) Ns r$ r i� i�a Zsndrr" r r' )r r7 )r r r, r r r � test_sndr� s r@ c C s, | d d >| d d >B| d d >B| d BS)Nr r! r" r r$ r r% r )�br r r r( � s r( c C s, | d d >| d d >B| d d >B| d BS)Nr% r! r$ r r" r r r )rA r r r r) � s r) c C s | d d >| d BS)Nr r r" r )rA r r r � get_short_be� s rB c C s | d d >| d BS)Nr" r r r )rA r r r r7 � s r7 c C s� d d l } d } | j d d � rQ | j d d k rQ | j d d � =d } n yJ | j d d � r� t | j d d � | d � n t d g | d � Wn/ t k r� | j j d � | j d � Yn Xd S)Nr r" z-rr$ �.z [Interrupted] )�sys�argv�testall�KeyboardInterrupt�stderr�write�exit)rD � recursiver r r �test� s & rL c C s d d l } d d l } x� | D]� } | j j | � r� t | d d d �| sW | r� t d � d d l } | j | j j | d � � } t | | d � q� t d � q t | d d d �| j j � y t t | � � Wq t k r� t d � Yq Xq Wd S) Nr z/:�end� zrecursing down:�*z*** directory (use -r) ***�:z*** not found ***) rD �os�path�isdir�print�glob�joinrF �stdout�flushr �OSError)�listrK ZtoplevelrD rQ r rU �namesr r r rF � s" rF �__main__N)�__doc__�__all__r r r r �appendr- r4 r9 r< r> r? r@ r( r) rB r7 rL rF �__name__r r r r �<module> s8
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