nfc@s*dZddgZdZdZgZdZejedZejedZejedZ eje d Z eje d Z eje d Z eje d Z eje d ZdZdZdZdZdZedkr&endS(sRoutines 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, IOError 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. twhattwhathdrcCst|}|S(sGuess the type of a sound file(R(tfilenametres((s/usr/lib64/python2.7/sndhdr.pyR#s cCsLt|d}|jd}x'tD]}|||}|r%|Sq%WdS(sRecognize sound headerstrbiN(topentreadtteststNone(RtfthttfR((s/usr/lib64/python2.7/sndhdr.pyR)s cCsddl}|d dkr dS|dd!dkr<d}n |dd!dkrXd }ndS|jd y|j|d }Wnt|jfk rdSX||j|j|jd|j fS( NiitFORMii tAIFCtaifctAIFFtaiffitr( RRtseektopenfptEOFErrortErrort getframeratet getnchannelst getnframest getsampwidth(R R Rtfmtta((s/usr/lib64/python2.7/sndhdr.pyt test_aifc:s    c Cs |d dkrt}n|d dkr2t}ndSd}||dd!}||dd!}||dd!}||dd !}||d d !}d }|d krd } n6|d krd} n!|dkrd} d }nd} ||} ||||| | fS(Nis.sndtds.sdns.tauii iiiitUiit?(Rsdns.(t get_long_bet get_long_leR( R R ttypethdr_sizet data_sizetencodingtratet nchannelst sample_sizet sample_bitst frame_size((s/usr/lib64/python2.7/sndhdr.pyttest_auOs,         cCsT|dd!dks&|dd!dkr*dSt|dd!}d d |d d d fS(NiAiEtFSSDiitHCOMiithcomi"Viiiii(RR!(R R tdivisor((s/usr/lib64/python2.7/sndhdr.pyt test_hcomls&cCs|d dkrdSt|dd!}d}d|koDdknr||dkrt||d}tdd |}nd |d d d fS(NisCreative Voice Fileiiisig.Aitvociii(Rt get_short_letordtint(R R tsbseekR'tratecode((s/usr/lib64/python2.7/sndhdr.pyttest_vocus,cCs|d dks6|dd!dks6|dd!dkr:dSt|dd !}t|d d !}t|d d !}t|d d !}d||d|fS(NitRIFFii tWAVEisfmt iiiii"i$twavi(RR3R"(R R tstyleR(R'R*((s/usr/lib64/python2.7/sndhdr.pyttest_wavs6cCs+|d dks#|dd!dkr'dSd S( NiR ii t8SVXt8svxii(R?iiii(R(R R ((s/usr/lib64/python2.7/sndhdr.pyt test_8svxs#cCsM|d dkrIt|dd!}t|dd!}d|d|dfSdS( NitSOUNDii iitsndti(R"R3(R R tnsamplesR'((s/usr/lib64/python2.7/sndhdr.pyt test_sndtscCsY|d dkrUt|dd!}d|ko:dknrUd|ddd fSndS( Nitiiiatsndriii(R3(R R R'((s/usr/lib64/python2.7/sndhdr.pyt test_sndrscCsDt|dd>t|dd>Bt|dd>Bt|dBS(Niiiiiii(R4(ts((s/usr/lib64/python2.7/sndhdr.pyR!scCsDt|dd>t|dd>Bt|dd>Bt|dBS(Niiiiiii(R4(RH((s/usr/lib64/python2.7/sndhdr.pyR"scCs t|dd>t|dBS(Niii(R4(RH((s/usr/lib64/python2.7/sndhdr.pyt get_short_bescCs t|dd>t|dBS(Niii(R4(RH((s/usr/lib64/python2.7/sndhdr.pyR3scCsddl}d}|jdrH|jddkrH|jdd5d}ny>|jdrrt|jd|dntdg|dWn.tk r|jjd|jdnXdS(Niiis-rit.s [Interrupted] (tsystargvttestalltKeyboardInterrupttstderrtwritetexit(RKt recursive((s/usr/lib64/python2.7/sndhdr.pyttests      cCsddl}ddl}x|D]}|jj|r|dG|sK|rdGHddl}|j|jj|d}t||dqdGHq|dG|jjyt |GHWqt k rdGHqXqWdS( Nis/:srecursing down:t*is*** directory (use -r) ***t:s*** not found ***( RKtostpathtisdirtglobtjoinRMtstdouttflushRtIOError(tlistRRttoplevelRKRVRRYtnames((s/usr/lib64/python2.7/sndhdr.pyRMs"       t__main__N(t__doc__t__all__RRRRtappendR,R1R8R=R@RDRGR!R"RIR3RSRMt__name__(((s/usr/lib64/python2.7/sndhdr.pyts8