[p@sZdZddgZddZddZgZddZejeddZejed d Zejed d Z eje d dZ eje ddZ eje ddZ eje ddZ eje ddZddZddZddZddZdd Zed!krVend"S)#aRoutines 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. whatwhathdrcCst|}|S)zGuess the type of a sound file.)r)filenameresr/usr/lib/python3.4/sndhdr.pyr#s c CsYt|dD}|jd}x'tD]}|||}|r(|Sq(WdSWdQXdS)zRecognize sound headers.rbiN)openreadtests)rfhZtfrrrrr)s cCsddl}|jdsdS|dddkr>d}n#|dddkr]d}ndS|jdy|j|d }Wnt|jfk rdSYnX||j|j|jd|j fS) NsFORM sAIFCaifcsAIFFZaiffr) r startswithseekrEOFErrorError getframerate getnchannels getnframes getsampwidth)r r rZfmtarrr test_aifc:s     rc Cs6|jdrt}n#|dddkr7t}ndSd}||dd}||dd}||dd}||dd }||d d }d } |d krd } n6|d krd} n!|dkrd} d } nd} | |} | r|| } nd} |||| | fS)Ns.sndds.dns.ZaurrU?)rr)r get_long_be get_long_le) r r funcZfiletypeZhdr_sizeZ data_sizeencodingrateZ nchannelsZ sample_sizeZ sample_bitsZ frame_sizeZnframerrrtest_auOs2          r-cCsr|dddks,|dddkr0dSt|dd}|rYd |}nd }d |d dd fS)NAEsFSSDsHCOMi"Vr Zhcomr"rr')r()r r Zdivisorr,rrr test_hcomps, r4cCs|jdsdSt|dd}d}d|koFdknr||dkrd||d}|rtd |}qnd |dd d fS) NsCreative Voice Filer r ir"rg.AZvocrr')r get_short_leint)r r Zsbseekr,Zratecoderrrtest_voc}s,r9cCsddl}|jd sH|dddksH|dddkrLdS|jdy|j|d}Wnt|jfk rdSYnXd |j|j|jd|j fS) Nr sRIFFrrsWAVErsfmt rZwav) waverrZopenfprrrrrr)r r r:wrrrtest_wavs <  r<cCs.|jd s&|dddkr*dSdS) NsFORMrrs8SVX8svxr r")r=r r"r r)r)r r rrr test_8svxs&r>cCsR|jdrNt|dd}t|dd}d|d|dfSdS)NsSOUNDrrr r5Zsndtr")rr)r7)r r Znsamplesr,rrr test_sndtsr?cCs[|jdrWt|dd}d|ko<dknrWd|dd dfSndS) Nsr$riiaZsndrr"rr')rr7)r r r,rrr test_sndrsr@cCs,|dd>|dd>B|dd>B|dBS)Nr r!r"rr$rr%r)brrrr(sr(cCs,|dd>|dd>B|dd>B|dBS)Nr%r!r$rr"rr r)rArrrr)sr)cCs|dd>|dBS)Nr rr"r)rArrr get_short_besrBcCs|dd>|dBS)Nr"rr r)rArrrr7sr7c Csddl}d}|jddrQ|jddkrQ|jdd=d}nyJ|jddrt|jdd|dntdg|dWn/tk r|jjd|jdYnXdS)Nr r"z-rr$.z [Interrupted] )sysargvtestallKeyboardInterruptstderrwriteexit)rD recursiverrrtests &   rLc Csddl}ddl}x|D]}|jj|rt|ddd|sW|rtdddl}|j|jj|d}t||dqtdqt|ddd|jj ytt |Wqt k rtd YqXqWdS) Nr z/:end zrecursing down:*z*** directory (use -r) ***:z*** not found ***) rDospathisdirprintglobjoinrFstdoutflushrOSError)listrKZtoplevelrDrQrrUnamesrrrrFs"         rF__main__N)__doc____all__rrr rappendr-r4r9r<r>r?r@r(r)rBr7rLrF__name__rrrrs8