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python2.7
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wave.pyc
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� z fc@s�dZddlZdddgZdefd��YZdZdZddlZddl Z dd l m Z d �Z d dd��YZ ddd��YZdd�ZeZdS(s Stuff to parse WAVE files. Usage. Reading WAVE files: f = wave.open(file, 'r') where file is either the name of a file or an open file pointer. The open file pointer must have methods read(), seek(), and close(). When the setpos() and rewind() methods are not used, the seek() method is not necessary. This returns an instance of a class with the following public methods: getnchannels() -- returns number of audio channels (1 for mono, 2 for stereo) getsampwidth() -- returns sample width in bytes getframerate() -- returns sampling frequency getnframes() -- returns number of audio frames getcomptype() -- returns compression type ('NONE' for linear samples) getcompname() -- returns human-readable version of compression type ('not compressed' linear samples) getparams() -- returns a tuple consisting of all of the above in the above order getmarkers() -- returns None (for compatibility with the aifc module) getmark(id) -- raises an error since the mark does not exist (for compatibility with the aifc module) readframes(n) -- returns at most n frames of audio rewind() -- rewind to the beginning of the audio stream setpos(pos) -- seek to the specified position tell() -- return the current position close() -- close the instance (make it unusable) The position returned by tell() and the position given to setpos() are compatible and have nothing to do with the actual position in the file. The close() method is called automatically when the class instance is destroyed. Writing WAVE files: f = wave.open(file, 'w') where file is either the name of a file or an open file pointer. The open file pointer must have methods write(), tell(), seek(), and close(). This returns an instance of a class with the following public methods: setnchannels(n) -- set the number of channels setsampwidth(n) -- set the sample width setframerate(n) -- set the frame rate setnframes(n) -- set the number of frames setcomptype(type, name) -- set the compression type and the human-readable compression type setparams(tuple) -- set all parameters at once tell() -- return current position in output file writeframesraw(data) -- write audio frames without pathing up the file header writeframes(data) -- write audio frames and patch up the file header close() -- patch up the file header and close the output file You should set the parameters before the first writeframesraw or writeframes. The total number of frames does not need to be set, but when it is set to the correct value, the header does not have to be patched up. It is best to first set all parameters, perhaps possibly the compression type, and then write audio frames using writeframesraw. When all frames have been written, either call writeframes('') or close() to patch up the sizes in the header. The close() method is called automatically when the class instance is destroyed. i����NtopentopenfptErrorcBseZRS((t__name__t __module__(((s /usr/lib64/python2.7/wave.pyRNsitbthti(tChunkcCsVt|�}|ddd�|ddd�<|ddd�|ddd�<t|�S(Nii(t bytearraytbytes(tdatatba((s /usr/lib64/python2.7/wave.pyt _byteswap3Ys t Wave_readcBs�eZdZd�Zd�Zd�Zd�Zd�Zd�Zd�Z d�Z d �Z d �Z d �Z d �Zd �Zd�Zd�Zd�Zd�Zd�Zd�ZRS(sPVariables used in this class: These variables are available to the user though appropriate methods of this class: _file -- the open file with methods read(), close(), and seek() set through the __init__() method _nchannels -- the number of audio channels available through the getnchannels() method _nframes -- the number of audio frames available through the getnframes() method _sampwidth -- the number of bytes per audio sample available through the getsampwidth() method _framerate -- the sampling frequency available through the getframerate() method _comptype -- the AIFF-C compression type ('NONE' if AIFF) available through the getcomptype() method _compname -- the human-readable AIFF-C compression type available through the getcomptype() method _soundpos -- the position in the audio stream available through the tell() method, set through the setpos() method These variables are used internally only: _fmt_chunk_read -- 1 iff the FMT chunk has been read _data_seek_needed -- 1 iff positioned correctly in audio file for readframes() _data_chunk -- instantiation of a chunk class for the DATA chunk _framesize -- size of one frame in the file cCsed|_d|_t|dd�|_|jj�dkrHtd�n|jjd�dkrltd�nd|_d|_ x�d|_ yt|jdd�}Wnt k r�PnX|j�}|d kr�|j |�d|_nJ|d kr3|js td �n||_ |j |j|_d|_ Pn|j�q�W|j sU|j ratd �ndS( Nit bigendiantRIFFs file does not start with RIFF iditWAVEsnot a WAVE fileisfmt R sdata chunk before fmt chunks#fmt chunk and/or data chunk missing(tNonet_convertt _soundposRt_filetgetnameRtreadt_fmt_chunk_readt _data_chunkt_data_seek_neededtEOFErrort_read_fmt_chunkt chunksizet _framesizet_nframestskip(tselftfiletchunkt chunkname((s /usr/lib64/python2.7/wave.pytinitfp~s: cCsnd|_t|t�r6tj|d�}||_ny|j|�Wn |jrc|j�n�nXdS(Ntrb(Rt_i_opened_the_filet isinstancet basestringt __builtin__RR%tclose(R!tf((s /usr/lib64/python2.7/wave.pyt__init__�s cCs|j�dS(N(R+(R!((s /usr/lib64/python2.7/wave.pyt__del__�scCs|jS(N(R(R!((s /usr/lib64/python2.7/wave.pytgetfp�scCsd|_d|_dS(Nii(RR(R!((s /usr/lib64/python2.7/wave.pytrewind�s cCs2d|_|j}|r.d|_|j�ndS(N(RRR'R+(R!R"((s /usr/lib64/python2.7/wave.pyR+�s cCs|jS(N(R(R!((s /usr/lib64/python2.7/wave.pyttell�scCs|jS(N(t _nchannels(R!((s /usr/lib64/python2.7/wave.pyt getnchannels�scCs|jS(N(R (R!((s /usr/lib64/python2.7/wave.pyt getnframes�scCs|jS(N(t _sampwidth(R!((s /usr/lib64/python2.7/wave.pyt getsampwidth�scCs|jS(N(t _framerate(R!((s /usr/lib64/python2.7/wave.pyt getframerate�scCs|jS(N(t _comptype(R!((s /usr/lib64/python2.7/wave.pyt getcomptype�scCs|jS(N(t _compname(R!((s /usr/lib64/python2.7/wave.pyt 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s0 (RRt__doc__R%R-R.R/R0R+R1R3R4R6R8R:R<R=R>R@RBRSR (((s /usr/lib64/python2.7/wave.pyR_s( )t Wave_writecBs�eZdZd�Zd�Zd�Zd�Zd�Zd�Zd�Z d�Z d �Z d �Z d �Z d �Zd �Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Z RS(s�Variables used in this class: These variables are user settable through appropriate methods of this class: _file -- the open file with methods write(), close(), tell(), seek() set through the __init__() method _comptype -- the AIFF-C compression type ('NONE' in AIFF) set through the setcomptype() or setparams() method _compname -- the human-readable AIFF-C compression type set through the setcomptype() or setparams() method _nchannels -- the number of audio channels set through the setnchannels() or setparams() method _sampwidth -- the number of bytes per audio sample set through the setsampwidth() or setparams() method _framerate -- the sampling frequency set through the setframerate() or setparams() method _nframes -- the number of audio frames written to the header set through the 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/home/../lib64/sasl2/../nss/../xtables/../krb5/../python2.7/wave.pyc