← Back
Editing: wave.cpython-33.pyc
� �� f�H c @ s� d Z d d l Z d d d g Z Gd d � d e � Z d Z d Z d d l Z d d l Z d d l m Z d d � Z Gd d � d � Z Gd d � d � Z d d d � Z e Z d S( u 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 Nu openu openfpu Errorc B s | Ee Z d Z d S( u ErrorN( u __name__u __module__u __qualname__( u __locals__( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu ErrorN s i u bu hu i( u Chunkc C sV t | � } | d d d � | d d d � <| d d d � | d d d � <t | � S( Ni i ( u bytearrayu bytes( u datau ba( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu _byteswap3Y s u _byteswap3c B s� | Ee Z d Z d Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d! � Z d" d# � Z d$ d% � Z d& d' � Z d( S() u Wave_readuP Variables 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 c C sq d | _ d | _ t | d d �| _ | j j � d k rK t d � � n | j j d � d k rr t d � � n d | _ d | _ x� d | _ y t | j d d �} Wn t k r� PYn X| j � } | d k r� | j | � d | _ nM | d k r=| j st d � � n | | _ | j | j | _ d | _ Pn | j � q� | j s^| j rmt d � � n d S( Ni u bigendians RIFFu file does not start with RIFF idi s WAVEu not a WAVE filei s fmt s datau data chunk before fmt chunku# fmt chunk and/or data chunk missing( u Noneu _convertu _soundposu Chunku _fileu getnameu Erroru readu _fmt_chunk_readu _data_chunku _data_seek_neededu EOFErroru _read_fmt_chunku chunksizeu _framesizeu _nframesu skip( u selfu fileu chunku chunkname( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu initfp~ s: u Wave_read.initfpc C so d | _ t | t � r6 t j | d � } | | _ n y | j | � Wn! | j rc | j � n � Yn Xd S( Nu rb( u Noneu _i_opened_the_fileu isinstanceu stru builtinsu openu initfpu close( u selfu f( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu __init__� s u Wave_read.__init__c C s | j � d S( N( u close( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu __del__� s u Wave_read.__del__c C s | j S( N( u _file( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getfp� s u Wave_read.getfpc C s d | _ d | _ d S( Ni i ( u _data_seek_neededu _soundpos( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu rewind� s u Wave_read.rewindc C s/ | j r" | j j � d | _ n d | _ d S( N( u _i_opened_the_fileu closeu Noneu _file( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu close� s u Wave_read.closec C s | j S( N( u _soundpos( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu tell� s u Wave_read.tellc C s | j S( N( u _nchannels( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getnchannels� s u Wave_read.getnchannelsc C s | j S( N( u _nframes( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getnframes� s u Wave_read.getnframesc C s | j S( N( u _sampwidth( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getsampwidth� s u Wave_read.getsampwidthc C s | j S( N( u _framerate( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getframerate� s u Wave_read.getframeratec C s | j S( N( u _comptype( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getcomptype� s u Wave_read.getcomptypec C s | j S( N( u _compname( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getcompname� s u Wave_read.getcompnamec C s: | j � | j � | j � | j � | j � | j � f S( N( u getnchannelsu getsampwidthu getframerateu getnframesu getcomptypeu getcompname( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getparams� s u Wave_read.getparamsc C s d S( N( u None( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getmarkers� s u Wave_read.getmarkersc C s t d � � d S( Nu no marks( u Error( u selfu id( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getmark� s u Wave_read.getmarkc C s@ | d k s | | j k r* t d � � n | | _ d | _ d S( Ni u position not in rangei ( u _nframesu Erroru _soundposu _data_seek_needed( u selfu pos( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu setpos� s u Wave_read.setposc C s� | j rT | j j d d � | j | j } | rH | j j | d � n d | _ n | d k rd d S| j d k rot j d k rod d l } | j } | j t | j � } | j | j k s� t � | | j } | | j | j | j k r | j | j | j } n | j | j j | � | j | | j | _ | j } | j | | j | _ | j � | j � } nF | j j | | j � } | j d k r�t j d k r�t | � } n | j r�| r�| j | � } n | j t | � | j | j | _ | S( Ni s i i u bigi ( i i ( u _data_seek_neededu _data_chunku seeku _soundposu _framesizeu _sampwidthu sysu byteorderu arrayu _array_fmtsu itemsizeu AssertionErroru _nchannelsu chunksizeu size_readu fromfileu fileu byteswapu tobytesu readu _byteswap3u _convertu len( u selfu nframesu posu arrayu chunku datau nitems( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu readframes� s: $u Wave_read.readframesc C s� t j d | j d � � \ } | _ | _ } } | t k ro t j d | j d � � d } | d d | _ n t d | f � � | j | j | _ d | _ d | _ d S( Nu <HHLLHi u <Hi i i i u unknown format: %ru NONEu not compressed( u structu unpack_fromu readu _nchannelsu _framerateu WAVE_FORMAT_PCMu _sampwidthu Erroru _framesizeu _comptypeu _compname( u selfu chunku wFormatTagu dwAvgBytesPerSecu wBlockAlignu sampwidth( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu _read_fmt_chunk s 0 u Wave_read._read_fmt_chunkN( u __name__u __module__u __qualname__u __doc__u initfpu __init__u __del__u getfpu rewindu closeu tellu getnchannelsu getnframesu getsampwidthu getframerateu getcomptypeu getcompnameu getparamsu getmarkersu getmarku setposu readframesu _read_fmt_chunk( u __locals__( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu Wave_read_ s( )u Wave_readc B sR | Ee Z d Z d Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d! � Z d" d# � Z d$ d% � Z d& d' � Z d( d) � Z d* d+ � Z d, d- � Z d. d/ � Z d0 d1 � Z d2 d3 � Z d4 d5 � Z d6 S(7 u Wave_writeu� 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 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 c C so d | _ t | t � r6 t j | d � } | | _ n y | j | � Wn! | j rc | j � n � Yn Xd S( Nu wb( u Noneu _i_opened_the_fileu isinstanceu stru builtinsu openu initfpu close( u selfu f( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu __init__0 s u Wave_write.__init__c C s^ | | _ d | _ d | _ d | _ d | _ d | _ d | _ d | _ d | _ d | _ d S( Ni F( u _fileu Noneu _convertu _nchannelsu _sampwidthu _framerateu _nframesu _nframeswrittenu _datawrittenu _datalengthu Falseu _headerwritten( u selfu file( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu initfp< s u Wave_write.initfpc C s | j � d S( N( u close( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu __del__H s u Wave_write.__del__c C s@ | j r t d � � n | d k r3 t d � � n | | _ d S( Nu0 cannot change parameters after starting to writei u bad # of channels( u _datawrittenu Erroru _nchannels( u selfu nchannels( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu setnchannelsN s u Wave_write.setnchannelsc C s | j s t d � � n | j S( Nu number of channels not set( u _nchannelsu Error( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getnchannelsU s u Wave_write.getnchannelsc C sL | j r t d � � n | d k s0 | d k r? t d � � n | | _ d S( Nu0 cannot change parameters after starting to writei i u bad sample width( u _datawrittenu Erroru _sampwidth( u selfu sampwidth( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu setsampwidthZ s u Wave_write.setsampwidthc C s | j s t d � � n | j S( Nu sample width not set( u _sampwidthu Error( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getsampwidtha s u Wave_write.getsampwidthc C sL | j r t d � � n | d k r3 t d � � n t t | � � | _ d S( Nu0 cannot change parameters after starting to writei u bad frame rate( u _datawrittenu Erroru intu roundu _framerate( u selfu framerate( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu setframeratef s u Wave_write.setframeratec C s | j s t d � � n | j S( Nu frame rate not set( u _framerateu Error( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getframeratem s u Wave_write.getframeratec C s% | j r t d � � n | | _ d S( Nu0 cannot change parameters after starting to write( u _datawrittenu Erroru _nframes( u selfu nframes( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu setnframesr s u Wave_write.setnframesc C s | j S( N( u _nframeswritten( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getnframesw s u Wave_write.getnframesc C sI | j r t d � � n | d k r3 t d � � n | | _ | | _ d S( Nu0 cannot change parameters after starting to writeu NONEu unsupported compression type( u NONE( u _datawrittenu Erroru _comptypeu _compname( u selfu comptypeu compname( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu setcomptypez s u Wave_write.setcomptypec C s | j S( N( u _comptype( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getcomptype� s u Wave_write.getcomptypec C s | j S( N( u _compname( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getcompname� s u Wave_write.getcompnamec C sx | \ } } } } } } | j r0 t d � � n | j | � | j | � | j | � | j | � | j | | � d S( Nu0 cannot change parameters after starting to write( u _datawrittenu Erroru setnchannelsu setsampwidthu setframerateu setnframesu setcomptype( u selfu paramsu nchannelsu sampwidthu framerateu nframesu comptypeu compname( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu setparams� s u Wave_write.setparamsc C sU | j s | j s | j r- t d � � n | j | j | j | j | j | j f S( Nu not all parameters set( u _nchannelsu _sampwidthu _framerateu Erroru _nframesu _comptypeu _compname( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getparams� s u Wave_write.getparamsc C s t d � � d S( Nu setmark() not supported( u Error( u selfu idu posu name( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu setmark� s u Wave_write.setmarkc C s t d � � d S( Nu no marks( u Error( u selfu id( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getmark� s u Wave_write.getmarkc C s d S( N( u None( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu getmarkers� s u Wave_write.getmarkersc C s | j S( N( u _nframeswritten( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu tell� s u Wave_write.tellc C sT | j t | � � t | � | j | j } | j rH | j | � } n | j d k r� t j d k r� d d l } | j t | j � } | j | � | } | j | j k s� t � | j � | j | j � | j t | � | j | _ nS | j d k rt j d k rt | � } n | j j | � | j t | � | _ | j | | _ d S( Ni i u bigi i ( i i ( u _ensure_header_writtenu lenu _sampwidthu _nchannelsu _convertu sysu byteorderu arrayu _array_fmtsu frombytesu itemsizeu AssertionErroru byteswapu tofileu _fileu _datawrittenu _byteswap3u writeu _nframeswritten( u selfu datau nframesu arrayu a( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu writeframesraw� s$ u Wave_write.writeframesrawc C s0 | j | � | j | j k r, | j � n d S( N( u writeframesrawu _datalengthu _datawrittenu _patchheader( u selfu data( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu writeframes� s u Wave_write.writeframesc C s| | j rV z= | j d � | j | j k r8 | j � n | j j � Wd d | _ Xn | j rx | j j � d | _ n d S( Ni ( u _fileu _ensure_header_writtenu _datalengthu _datawrittenu _patchheaderu flushu Noneu _i_opened_the_fileu close( u self( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu close� s u Wave_write.closec C se | j sa | j s! t d � � n | j s9 t d � � n | j sQ t d � � n | j | � n d S( Nu # channels not specifiedu sample width not specifiedu sampling rate not specified( u _headerwrittenu _nchannelsu Erroru _sampwidthu _framerateu _write_header( u selfu datasize( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu _ensure_header_written� s u! Wave_write._ensure_header_writtenc C s | j s t � | j j d � | j sC | | j | j | _ n | j | j | j | _ | j j � | _ | j j t j d d | j d d d t | j | j | j | j | j | j | j | j d d � � | j j � | _ | j j t j d | j � � d | _ d S( Ns RIFFu <L4s4sLHHLLHH4si$ s WAVEs fmt i i s datau <LT( u _headerwrittenu AssertionErroru _fileu writeu _nframesu _nchannelsu _sampwidthu _datalengthu tellu _form_length_posu structu packu WAVE_FORMAT_PCMu _framerateu _data_length_posu True( u selfu initlength( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu _write_header� s u Wave_write._write_headerc C s� | j s t � | j | j k r% d S| j j � } | j j | j d � | j j t j d d | j � � | j j | j d � | j j t j d | j � � | j j | d � | j | _ d S( Ni u <Li$ ( u _headerwrittenu AssertionErroru _datawrittenu _datalengthu _fileu tellu seeku _form_length_posu writeu structu packu _data_length_pos( u selfu curpos( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu _patchheader� s # u Wave_write._patchheaderN( u __name__u __module__u __qualname__u __doc__u __init__u initfpu __del__u setnchannelsu getnchannelsu setsampwidthu getsampwidthu setframerateu getframerateu setnframesu getnframesu setcomptypeu getcomptypeu getcompnameu setparamsu getparamsu setmarku getmarku getmarkersu tellu writeframesrawu writeframesu closeu _ensure_header_writtenu _write_headeru _patchheader( u __locals__( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu Wave_write s6 u Wave_writec C sl | d k r0 t | d � r' | j } q0 d } n | d k rF t | � S| d k r\ t | � St d � � d S( Nu modeu rbu ru wu wbu$ mode must be 'r', 'rb', 'w', or 'wb'( u ru rb( u wu wb( u Noneu hasattru modeu Wave_readu Wave_writeu Error( u fu mode( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu open� s ( Nu bu hNu i( u __doc__u builtinsu __all__u Exceptionu Erroru WAVE_FORMAT_PCMu Noneu _array_fmtsu structu sysu chunku Chunku _byteswap3u Wave_readu Wave_writeu openu openfp( ( ( u) /opt/alt/python33/lib64/python3.3/wave.pyu <module>H s ��
Save File
Cancel