zfc@sdZddlZdddgZdefdYZdZdZddlZddl Z dd l m Z d Z d ddYZ dddYZddZeZdS(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. iNtopentopenfptErrorcBseZRS((t__name__t __module__(((s/usr/lib64/python2.7/wave.pyRNsitbthti(tChunkcCsVt|}|ddd|ddd<|ddd|dddR@RBRSR(((s/usr/lib64/python2.7/wave.pyR_s(                 )t Wave_writecBseZdZdZdZdZdZdZdZdZ dZ d Z d Z d Z d Zd ZdZdZdZdZdZdZdZdZdZdZdZdZdZRS(sVariables 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 setnframes() or setparams() method These variables are used internally only: _datalength -- the size of the audio samples written to the header _nframeswritten -- the number of frames actually written _datawritten -- the size of the audio samples actually written cCsnd|_t|tr6tj|d}||_ny|j|Wn |jrc|jnnXdS(Ntwb(RR'R(R)R*RR%R+(R!R,((s/usr/lib64/python2.7/wave.pyR-1s    cCs^||_d|_d|_d|_d|_d|_d|_d|_d|_ t |_ dS(Ni( RRRR2R5R7Rt_nframeswrittent _datawrittent _datalengthtFalset_headerwritten(R!R"((s/usr/lib64/python2.7/wave.pyR%=s         cCs|jdS(N(R+(R!((s/usr/lib64/python2.7/wave.pyR.IscCs:|jrtdn|dkr-tdn||_dS(Ns0cannot change parameters after starting to writeisbad # of channels(R`RR2(R!t nchannels((s/usr/lib64/python2.7/wave.pyt setnchannelsOs     cCs|jstdn|jS(Nsnumber of channels not set(R2R(R!((s/usr/lib64/python2.7/wave.pyR3Vs  cCsF|jrtdn|dks-|dkr9tdn||_dS(Ns0cannot change parameters after starting to writeiisbad sample width(R`RR5(R!R[((s/usr/lib64/python2.7/wave.pyt setsampwidth[s    cCs|jstdn|jS(Nssample width not set(R5R(R!((s/usr/lib64/python2.7/wave.pyR6bs  cCs:|jrtdn|dkr-tdn||_dS(Ns0cannot change parameters after starting to writeisbad frame rate(R`RR7(R!t framerate((s/usr/lib64/python2.7/wave.pyt setframerategs     cCs|jstdn|jS(Nsframe rate not set(R7R(R!((s/usr/lib64/python2.7/wave.pyR8ns  cCs"|jrtdn||_dS(Ns0cannot change parameters after starting to write(R`RR(R!RQ((s/usr/lib64/python2.7/wave.pyt setnframesss  cCs|jS(N(R_(R!((s/usr/lib64/python2.7/wave.pyR4xscCsC|jrtdn|dkr-tdn||_||_dS(Ns0cannot change parameters after starting to writeRTsunsupported compression type(RT(R`RR9R;(R!tcomptypetcompname((s/usr/lib64/python2.7/wave.pyt setcomptype{s      cCs|jS(N(R9(R!((s/usr/lib64/python2.7/wave.pyR:scCs|jS(N(R;(R!((s/usr/lib64/python2.7/wave.pyR<scCsu|\}}}}}}|jr-tdn|j||j||j||j||j||dS(Ns0cannot change parameters after starting to write(R`RReRfRhRiRl(R!tparamsRdR[RgRQRjRk((s/usr/lib64/python2.7/wave.pyt setparamss      cCsR|j s|j s|j r*tdn|j|j|j|j|j|jfS(Nsnot all parameters set(R2R5R7RRR9R;(R!((s/usr/lib64/python2.7/wave.pyR=s cCs tddS(Nssetmark() not supported(R(R!R?RAtname((s/usr/lib64/python2.7/wave.pytsetmarkscCs tddS(Nsno marks(R(R!R?((s/usr/lib64/python2.7/wave.pyR@scCsdS(N(R(R!((s/usr/lib64/python2.7/wave.pyR>scCs|jS(N(R_(R!((s/usr/lib64/python2.7/wave.pyR1scCsT|jt|t||j|j}|jrH|j|}n|jdkrtjdkrddl}|jt|j}|j ||}|j |jkst |j |j |j|jt||j|_nS|jdkrtjdkrt|}n|jj||jt||_|j||_dS(NiiRDii(ii(t_ensure_header_writtenRPR5R2RRFRGRHRIt fromstringRJRKRNttofileRR`R twriteR_(R!R RQRHta((s/usr/lib64/python2.7/wave.pytwriteframesraws$     cCs0|j||j|jkr,|jndS(N(RvRaR`t _patchheader(R!R ((s/usr/lib64/python2.7/wave.pyt writeframess cCszI|jrH|jd|j|jkr8|jn|jjnWdd|_|j}|rzd|_|jnXdS(Ni( RRqRaR`RwtflushRR'R+(R!R"((s/usr/lib64/python2.7/wave.pyR+s      cCs\|jsX|jstdn|js3tdn|jsHtdn|j|ndS(Ns# channels not specifiedssample width not specifiedssampling rate not specified(RcR2RR5R7t _write_header(R!tdatasize((s/usr/lib64/python2.7/wave.pyRqs       cCs|j st|jjd|jsC||j|j|_n|j|j|j|_|jj|_ |jjt j dd|jdddt |j|j |j|j |j|j|j|jdd |jj|_|jjt j d |jt|_dS( NRsR1RvRxR+RqRzRw(((s/usr/lib64/python2.7/wave.pyR]s6                     cCsi|dkr0t|dr'|j}q0d}n|dkrFt|S|dkr\t|StddS( NtmodeR&trtwR^s$mode must be 'r', 'rb', 'w', or 'wb'(RR&(RR^(RthasattrRRR]R(R,R((s/usr/lib64/python2.7/wave.pyRs       (NRRNR(((R\R*t__all__t ExceptionRRWRRIRURFR#RR RR]RR(((s/usr/lib64/python2.7/wave.pytHs