o 0 i` @sdZdZddlZddlZddlmZmZmZddl m Z ddl m ZzeZWn ey1eZYnwddd d d d d dddd Ziddddddddddddddd d!d"d#d$d%d&d'd(d)d*d+d,d-d.d/d0d1d2d3d4d5d6d7d8d9d:d;ddd?dd@d dAd dBd dCd dDd dEddFdGdHdIdJdKdLdMdNdOdPdQdRdSdTdUdVdWidXdYdZd[d\d]d^d_d`dadbdcdddedfdgdhdidjdkdldmdndodpdqdrdsdtdudvdwdxdyZddzd{d|d}Zidd?dd?dd?dd?dd?dd?d d?d"d?d$d?d&dDd(dDd*d?d,dfd.d?d0d?d2d?d~d?d?d?d?dFdhd?d?dxdZdddddZddddZzejdkrSddlmZdedZnSejdkrddlmZddlmZeddkrpdZn6eddkr{dZn+e d!eeejdkrddlmZedvrdZn dedZne dddl"Z"ej#$e"j%Z&ej#'e&eZ(e)e(Z*Wnue e+e,fy3ze dZ-e-dure de)e-Z*WnSe y0ejdkrdZ.nejdkrdZ.n ejdkrdZ.nddlmZejdkr)edkr)ej#/drdndZ0e)ej#'e0e.Z*ne)e.Z*YnwYnwe1e*23ddZ4e45drMe4e6ddZ4  dddZ7  dddZ8    dddZ9Gddde:Z;dddZdddZ?ddZ@Gddde:ZAdddZBddZCddZDddZEddÄZFddńZGe*jHfddDŽZIddɄZJdd˄ZKdd̈́ZLGddτdeMZNGddфdeNeOZPGddӄdePZQdS)akpython-soundfile is an audio library based on libsndfile, CFFI and NumPy. Sound files can be read or written directly using the functions `read()` and `write()`. To read a sound file in a block-wise fashion, use `blocks()`. Alternatively, sound files can be opened as `SoundFile` objects. For further information, see https://python-soundfile.readthedocs.io/. z0.13.1N)SEEK_SETSEEK_CURSEEK_END) find_library)ffi ) title copyrightZsoftwareZartistcommentdateZalbumlicenseZ tracknumberZgenreZWAViZAIFFiZAUiRAWiZPAFiZSVXiZNISTiZVOCiZIRCAMi ZW64i ZMAT4i ZMAT5i ZPVFiZXIiZHTKiZSDSiZAVRiiiiiii i!i"i#) WAVEXSD2FLACCAFWVEOGGMPC2KRF64MP3ZPCM_S8ZPCM_16ZPCM_24ZPCM_32ZPCM_U8FLOATDOUBLEZULAWZALAWZ IMA_ADPCMZMS_ADPCMZGSM610 Z VOX_ADPCM!Z NMS_ADPCM_16"Z NMS_ADPCM_24#Z NMS_ADPCM_32$ZG721_320ZG723_241ZG723_402ZDWVW_12@ZDWVW_16AZDWVW_24BZDWVW_NCZDPCM_8PZDPCM_16QZVORBIS`ZOPUSdZALAC_16pZALAC_20qZALAC_24rZALAC_32sZ MPEG_LAYER_IZ MPEG_LAYER_IIZMPEG_LAYER_IIIii i0)FILEZLITTLEZBIGZCPUr)rrrrrrrrdoublefloatintZshort)float64Zfloat32Zint32Zint16)ZCONSTANTZAVERAGEVARIABLEdarwin)machineZ libsndfile_z.dylibwin32) architecture64bitzlibsndfile_x64.dll32bitzlibsndfile_x86.dllz%no packaged library for Windows {} {}linux)aarch64Z aarch64_beZarmv8bZarmv8lzlibsndfile_arm64.soz.soz%no packaged library for this platformZsndfilez8sndfile library not found using ctypes.util.find_libraryzlibsndfile.dylibzlibsndfile.dllz libsndfile.soarm64z/opt/homebrew/lib/z/usr/local/lib/utf-8replacez libsndfile-r@FTc Cs`t|d|| | | | | }||||}||||||}Wdn1s&wY||jfS)aProvide audio data from a sound file as NumPy array. By default, the whole file is read from the beginning, but the position to start reading can be specified with *start* and the number of frames to read can be specified with *frames*. Alternatively, a range can be specified with *start* and *stop*. If there is less data left in the file than requested, the rest of the frames are filled with *fill_value*. If no *fill_value* is specified, a smaller array is returned. Parameters ---------- file : str or int or file-like object The file to read from. See `SoundFile` for details. frames : int, optional The number of frames to read. If *frames* is negative, the whole rest of the file is read. Not allowed if *stop* is given. start : int, optional Where to start reading. A negative value counts from the end. stop : int, optional The index after the last frame to be read. A negative value counts from the end. Not allowed if *frames* is given. dtype : {'float64', 'float32', 'int32', 'int16'}, optional Data type of the returned array, by default ``'float64'``. Floating point audio data is typically in the range from ``-1.0`` to ``1.0``. Integer data is in the range from ``-2**15`` to ``2**15-1`` for ``'int16'`` and from ``-2**31`` to ``2**31-1`` for ``'int32'``. .. note:: Reading int values from a float file will *not* scale the data to [-1.0, 1.0). If the file contains ``np.array([42.6], dtype='float32')``, you will read ``np.array([43], dtype='int32')`` for ``dtype='int32'``. Returns ------- audiodata : `numpy.ndarray` or type(out) A two-dimensional (frames x channels) NumPy array is returned. If the sound file has only one channel, a one-dimensional array is returned. Use ``always_2d=True`` to return a two-dimensional array anyway. If *out* was specified, it is returned. If *out* has more frames than available in the file (or if *frames* is smaller than the length of *out*) and no *fill_value* is given, then only a part of *out* is overwritten and a view containing all valid frames is returned. samplerate : int The sample rate of the audio file. Other Parameters ---------------- always_2d : bool, optional By default, reading a mono sound file will return a one-dimensional array. With ``always_2d=True``, audio data is always returned as a two-dimensional array, even if the audio file has only one channel. fill_value : float, optional If more frames are requested than available in the file, the rest of the output is be filled with *fill_value*. If *fill_value* is not specified, a smaller array is returned. out : `numpy.ndarray` or subclass, optional If *out* is specified, the data is written into the given array instead of creating a new array. In this case, the arguments *dtype* and *always_2d* are silently ignored! If *frames* is not given, it is obtained from the length of *out*. samplerate, channels, format, subtype, endian, closefd See `SoundFile`. Examples -------- >>> import soundfile as sf >>> data, samplerate = sf.read('stereo_file.wav') >>> data array([[ 0.71329652, 0.06294799], [-0.26450912, -0.38874483], ... [ 0.67398441, -0.11516333]]) >>> samplerate 44100 rN) SoundFile _prepare_readread samplerate)fileframesstartstopdtype always_2d fill_valueoutrRchannelsformatsubtypeendianclosefdfdatarbU/home/app/PaddleOCR-VL-test/.venv_paddleocr/lib/python3.10/site-packages/soundfile.pyrQs V rQc Csvddl} | |}|jdkrd} n|jd} t|d|| |||||| } | |WddS1s4wYdS)aWrite data to a sound file. .. note:: If *file* exists, it will be truncated and overwritten! Parameters ---------- file : str or int or file-like object The file to write to. See `SoundFile` for details. data : array_like The data to write. Usually two-dimensional (frames x channels), but one-dimensional *data* can be used for mono files. Only the data types ``'float64'``, ``'float32'``, ``'int32'`` and ``'int16'`` are supported. .. note:: The data type of *data* does **not** select the data type of the written file. Audio data will be converted to the given *subtype*. Writing int values to a float file will *not* scale the values to [-1.0, 1.0). If you write the value ``np.array([42], dtype='int32')``, to a ``subtype='FLOAT'`` file, the file will then contain ``np.array([42.], dtype='float32')``. samplerate : int The sample rate of the audio data. subtype : str, optional See `default_subtype()` for the default value and `available_subtypes()` for all possible values. Other Parameters ---------------- format, endian, closefd, compression_level, bitrate_mode See `SoundFile`. Examples -------- Write 10 frames of random data to a new file: >>> import numpy as np >>> import soundfile as sf >>> sf.write('stereo_file.wav', np.random.randn(10, 2), 44100, 'PCM_24') rNrw)numpyZasarrayndimshaperOwrite) rSrarRr]r^r\r_compression_level bitrate_modenpr[r`rbrbrcrh8s-     "rhc csnt|d| | | || |!}||||}|||||||| D]}|VqWddS1s0wYdS)a8Return a generator for block-wise reading. By default, iteration starts at the beginning and stops at the end of the file. Use *start* to start at a later position and *frames* or *stop* to stop earlier. If you stop iterating over the generator before it's exhausted, the sound file is not closed. This is normally not a problem because the file is opened in read-only mode. To close the file properly, the generator's ``close()`` method can be called. Parameters ---------- file : str or int or file-like object The file to read from. See `SoundFile` for details. blocksize : int The number of frames to read per block. Either this or *out* must be given. overlap : int, optional The number of frames to rewind between each block. Yields ------ `numpy.ndarray` or type(out) Blocks of audio data. If *out* was given, and the requested frames are not an integer multiple of the length of *out*, and no *fill_value* was given, the last block will be a smaller view into *out*. Other Parameters ---------------- frames, start, stop See `read()`. dtype : {'float64', 'float32', 'int32', 'int16'}, optional See `read()`. always_2d, fill_value, out See `read()`. samplerate, channels, format, subtype, endian, closefd See `SoundFile`. Examples -------- >>> import soundfile as sf >>> for block in sf.blocks('stereo_file.wav', blocksize=1024): >>> pass # do something with 'block' rNN)rOrPblocks)rS blocksizeoverlaprTrUrVrWrXrYrZrRr[r\r]r^r_r`blockrbrbrcrlqs 3 "rlc@s,eZdZdZddZeddZddZdS) _SoundFileInfozInformation about a SoundFilecCs||_t|>}|j|_|j|_|j|_|j|_t|j|j|_|j|_|j |_ |j |_ |j |_ |j |_ |j |_ |j|_WddS1sHwYdSN)verboserOnamerRr[rTr>durationr\r]r^ format_info subtype_infosections extra_info)selfrSrrr`rbrbrc__init__s  "z_SoundFileInfo.__init__cCsvt|jd\}}t|d\}}|dkrd|||}|S|dkr(d||}|S|dkr4d|j}|Sd|}|S)Ni<rz{0:.0g}:{1:02.0g}:{2:05.3f} hz{0:02.0g}:{1:05.3f} minz {0:d} samplesz {0:.3f} s)divmodrtr\rT)ryhoursrestminutessecondsrtrbrbrc _duration_strs   z_SoundFileInfo._duration_strcCsDdgd}|jr|dgd7}d|jd}|||S)N )z{0.name}zsamplerate: {0.samplerate} Hzzchannels: {0.channels}zduration: {0._duration_str}z$format: {0.format_info} [{0.format}]z'subtype: {0.subtype_info} [{0.subtype}])z endian: {0.endian}zsections: {0.sections}zframes: {0.frames}zextra_info: """z {1}"""z )joinrrrxsplitr\)ryinfoZindented_extra_inforbrbrc__repr__s z_SoundFileInfo.__repr__N)__name__ __module__ __qualname____doc__rzpropertyrrrbrbrbrcrps   rpcCs t||S)zReturns an object with information about a `SoundFile`. Parameters ---------- verbose : bool Whether to print additional information. )rp)rSrrrbrbrcrs rcCstttjtjS)aReturn a dictionary of available major formats. Examples -------- >>> import soundfile as sf >>> sf.available_formats() {'FLAC': 'FLAC (FLAC Lossless Audio Codec)', 'OGG': 'OGG (OGG Container format)', 'WAV': 'WAV (Microsoft)', 'AIFF': 'AIFF (Apple/SGI)', ... 'WAVEX': 'WAVEX (Microsoft)', 'RAW': 'RAW (header-less)', 'MAT5': 'MAT5 (GNU Octave 2.1 / Matlab 5.0)'} )dict_available_formats_helper_sndZSFC_GET_FORMAT_MAJOR_COUNTZSFC_GET_FORMAT_MAJORrbrbrbrcavailable_formatssrcs$ttjtj}tfdd|DS)adReturn a dictionary of available subtypes. Parameters ---------- format : str If given, only compatible subtypes are returned. Examples -------- >>> import soundfile as sf >>> sf.available_subtypes('FLAC') {'PCM_24': 'Signed 24 bit PCM', 'PCM_16': 'Signed 16 bit PCM', 'PCM_S8': 'Signed 8 bit PCM'} c3s.|]\}}dust|r||fVqdSrq) check_format).0r]rsr\rbrc s  z%available_subtypes..)rrZSFC_GET_FORMAT_SUBTYPE_COUNTZSFC_GET_FORMAT_SUBTYPEr)r\subtypesrbrrcavailable_subtypessrc Cs,z tt|||WSttfyYdSw)zCheck if the combination of format/subtype/endian is valid. Examples -------- >>> import soundfile as sf >>> sf.check_format('WAV', 'PCM_24') True >>> sf.check_format('FLAC', 'VORBIS') False F)bool _format_int ValueError TypeError)r\r]r^rbrbrcrs  rcCst|t|S)zReturn the default subtype for a given format. Examples -------- >>> import soundfile as sf >>> sf.default_subtype('WAV') 'PCM_16' >>> sf.default_subtype('MAT5') 'DOUBLE' ) _check_format_default_subtypesgetupperrrbrbrcdefault_subtype)s rc@s6eZdZdZ   deddZeddZ ed dZ ed dZ ed dZ ed dZ ed dZ eddZ eddZ eddZ eddZ eddZ eddZ eddZ eddZ eddZ eddZdZddZddZddZdd Zd!d"Zd#d$Zd%d&Zd'd(Zd)d*Zd+d,Z e!fd-d.Z"d/d0Z# 3 dfd4d5Z$dgd6d7Z%d8d9Z&d:d;Z'd`__. bitrate_mode : {'CONSTANT', 'AVERAGE', 'VARIABLE'}, optional The bitrate mode on 'write()'. See `libsndfile document `__. Examples -------- >>> from soundfile import SoundFile Open an existing file for reading: >>> myfile = SoundFile('existing_file.wav') >>> # do something with myfile >>> myfile.close() Create a new sound file for reading and writing using a with statement: >>> with SoundFile('new_file.wav', 'x+', 44100, 2) as myfile: >>> # do something with myfile >>> # ... >>> assert not myfile.closed >>> # myfile.close() is called automatically at the end >>> assert myfile.closed __fspath__Nmodezr+r)hasattrr_namegetattr _check_mode_mode_compression_level _bitrate_mode_create_info_struct_info_open_fileset issupersetseekableseekr sf_commandZSFC_SET_CLIPPING_ffiNULLSF_TRUE_set_compression_level_set_bitrate_mode) ryrSrrRr[r]r^r\r_rirjmode_intrbrbrcrzAs.g      zSoundFile.__init__cC|jSrq)rryrbrbrczSoundFile.cCrrq)rrrbrbrcrrcC|jjSrq)rrRrrbrbrcrcCrrqrrTrrbrbrcrrcCrrq)rr[rrbrbrcrrcCt|jjtj@Srq) _format_strrr\rSF_FORMAT_TYPEMASKrrbrbrcrcCrrq)rrr\rSF_FORMAT_SUBMASKrrbrbrcrrcCrrq)rrr\rZSF_FORMAT_ENDMASKrrbrbrcrrcCt|jjtj@dSNr) _format_inforr\rrrrbrbrcr cCrr)rrr\rrrrbrbrcrrcCrrq)rrwrrbrbrcrrcCs |jduSrq)rrrbrbrcrs cCs t|jSrq)rsf_errorrrrbrbrcrs cCrrq)rrrbrbrcrrcCrrq)rrrbrbrcrrcCs8tdd}t|jtj|t|t|ddS)z8Retrieve the log string generated when opening the file.zchar[]i@rKrL) rnewrrrZSFC_GET_LOG_INFOsizeofstringdecode)ryrrbrbrcrxs   zSoundFile.extra_infocCsD|jdur d|jnd}||jdurd|jnd7}d||S)Nz, compression_level={0}z, bitrate_mode='{0}'zSoundFile({0.name!r}, mode={0.mode!r}, samplerate={0.samplerate}, channels={0.channels}, format={0.format!r}, subtype={0.subtype!r}, endian={0.endian!r}{1}))rir\rj)ryZcompression_settingrbrbrcrs    zSoundFile.__repr__cC |dSrqcloserrbrbrc__del__ zSoundFile.__del__cCs|Srqrbrrbrbrc __enter__szSoundFile.__enter__cGrrqr)ryargsrbrbrc__exit__rzSoundFile.__exit__cCsF|tvr|t|jt||}t|dSt|||dS)z:Write text meta-data in the sound file through properties.N) _str_types_check_if_closedrZ sf_set_stringrencode _error_checkobject __setattr__)ryrsvalueerrrbrbrcrs zSoundFile.__setattr__cCsJ|tvr|t|jt|}|rt|ddSdStd |)z9Read text meta-data in the sound file through properties.rKrLrz)'SoundFile' object has no attribute {0!r}) rrr sf_get_stringrrrrAttributeErrorr\)ryrsrarbrbrc __getattr__szSoundFile.__getattr__cCrrqrrrbrbrc__len__zSoundFile.__len__cCsdS)NTrbrrbrbrc__bool__szSoundFile.__bool__cCs|Srq)rrrbrbrc __nonzero__"rzSoundFile.__nonzero__cCs|jjtjkS)z)Return True if the file supports seeking.)rrrrrrbrbrcr'szSoundFile.seekablecCs&|t|j||}t|j|S)aSet the read/write position. Parameters ---------- frames : int The frame index or offset to seek. whence : {SEEK_SET, SEEK_CUR, SEEK_END}, optional By default (``whence=SEEK_SET``), *frames* are counted from the beginning of the file. ``whence=SEEK_CUR`` seeks from the current position (positive and negative values are allowed for *frames*). ``whence=SEEK_END`` seeks from the end (use negative value for *frames*). Returns ------- int The new absolute read/write position in frames. Examples -------- >>> from soundfile import SoundFile, SEEK_END >>> myfile = SoundFile('stereo_file.wav') Seek to the beginning of the file: >>> myfile.seek(0) 0 Seek to the end of the file: >>> myfile.seek(0, SEEK_END) 44100 # this is the file length )rrZsf_seekrr _errorcode)ryrTwhencepositionrbrbrcr+s$ zSoundFile.seekcCs |dtS)z'Return the current read/write position.r)rrrrbrbrctellTs zSoundFile.tellrMr@FcCs|dur|||}||||}n|dks|t|kr t|}|d||}t||kr?|dur9|d|}|S|||d<|S)a Read from the file and return data as NumPy array. Reads the given number of frames in the given data format starting at the current read/write position. This advances the read/write position by the same number of frames. By default, all frames from the current read/write position to the end of the file are returned. Use `seek()` to move the current read/write position. Parameters ---------- frames : int, optional The number of frames to read. If ``frames < 0``, the whole rest of the file is read. dtype : {'float64', 'float32', 'int32', 'int16'}, optional Data type of the returned array, by default ``'float64'``. Floating point audio data is typically in the range from ``-1.0`` to ``1.0``. Integer data is in the range from ``-2**15`` to ``2**15-1`` for ``'int16'`` and from ``-2**31`` to ``2**31-1`` for ``'int32'``. .. note:: Reading int values from a float file will *not* scale the data to [-1.0, 1.0). If the file contains ``np.array([42.6], dtype='float32')``, you will read ``np.array([43], dtype='int32')`` for ``dtype='int32'``. Returns ------- audiodata : `numpy.ndarray` or type(out) A two-dimensional NumPy (frames x channels) array is returned. If the sound file has only one channel, a one-dimensional array is returned. Use ``always_2d=True`` to return a two-dimensional array anyway. If *out* was specified, it is returned. If *out* has more frames than available in the file (or if *frames* is smaller than the length of *out*) and no *fill_value* is given, then only a part of *out* is overwritten and a view containing all valid frames is returned. Other Parameters ---------------- always_2d : bool, optional By default, reading a mono sound file will return a one-dimensional array. With ``always_2d=True``, audio data is always returned as a two-dimensional array, even if the audio file has only one channel. fill_value : float, optional If more frames are requested than available in the file, the rest of the output is be filled with *fill_value*. If *fill_value* is not specified, a smaller array is returned. out : `numpy.ndarray` or subclass, optional If *out* is specified, the data is written into the given array instead of creating a new array. In this case, the arguments *dtype* and *always_2d* are silently ignored! If *frames* is not given, it is obtained from the length of *out*. Examples -------- >>> from soundfile import SoundFile >>> myfile = SoundFile('stereo_file.wav') Reading 3 frames from a stereo file: >>> myfile.read(3) array([[ 0.71329652, 0.06294799], [-0.26450912, -0.38874483], [ 0.67398441, -0.11516333]]) >>> myfile.close() See Also -------- buffer_read, .write NrrQ) _check_frames_create_empty_arraylen _array_io)ryrTrWrXrYrZrbrbrcrQXsP    zSoundFile.readcCsT|j|dd}||}t|d||j}|d|||}||ks%Jt|S)aRead from the file and return data as buffer object. Reads the given number of *frames* in the given data format starting at the current read/write position. This advances the read/write position by the same number of frames. By default, all frames from the current read/write position to the end of the file are returned. Use `seek()` to move the current read/write position. Parameters ---------- frames : int, optional The number of frames to read. If ``frames < 0``, the whole rest of the file is read. dtype : {'float64', 'float32', 'int32', 'int16'} Audio data will be converted to the given data type. Returns ------- buffer A buffer containing the read data. See Also -------- buffer_read_into, .read, buffer_write N)rYz[]rQ)r _check_dtyperrr[ _cdata_iobuffer)ryrTrWctypecdataZ read_framesrbrbrc buffer_reads    zSoundFile.buffer_readcCs.||}|||\}}|d|||}|S)aRead from the file into a given buffer object. Fills the given *buffer* with frames in the given data format starting at the current read/write position (which can be changed with `seek()`) until the buffer is full or the end of the file is reached. This advances the read/write position by the number of frames that were read. Parameters ---------- buffer : writable buffer Audio frames from the file are written to this buffer. dtype : {'float64', 'float32', 'int32', 'int16'} The data type of *buffer*. Returns ------- int The number of frames that were read from the file. This can be less than the size of *buffer*. The rest of the buffer is not filled with meaningful data. See Also -------- buffer_read, .read rQ)r _check_bufferr)ryrrWrrrTrbrbrcbuffer_read_intos zSoundFile.buffer_read_intocCsBddl}||}|d|t|}|t|ksJ||dS)aWrite audio data from a NumPy array to the file. Writes a number of frames at the read/write position to the file. This also advances the read/write position by the same number of frames and enlarges the file if necessary. Note that writing int values to a float file will *not* scale the values to [-1.0, 1.0). If you write the value ``np.array([42], dtype='int32')``, to a ``subtype='FLOAT'`` file, the file will then contain ``np.array([42.], dtype='float32')``. Parameters ---------- data : array_like The data to write. Usually two-dimensional (frames x channels), but one-dimensional *data* can be used for mono files. Only the data types ``'float64'``, ``'float32'``, ``'int32'`` and ``'int16'`` are supported. .. note:: The data type of *data* does **not** select the data type of the written file. Audio data will be converted to the given *subtype*. Writing int values to a float file will *not* scale the values to [-1.0, 1.0). If you write the value ``np.array([42], dtype='int32')``, to a ``subtype='FLOAT'`` file, the file will then contain ``np.array([42.], dtype='float32')``. Examples -------- >>> import numpy as np >>> from soundfile import SoundFile >>> myfile = SoundFile('stereo_file.wav') Write 10 frames of random data to a new file: >>> with SoundFile('stereo_file.wav', 'w', 44100, 2, 'PCM_24') as f: >>> f.write(np.random.randn(10, 2)) See Also -------- buffer_write, .read rNrh)reZascontiguousarrayrr_update_frames)ryrarkwrittenrbrbrcrhs . zSoundFile.writecCsD||}|||\}}|d|||}||ksJ||dS)aWrite audio data from a buffer/bytes object to the file. Writes the contents of *data* to the file at the current read/write position. This also advances the read/write position by the number of frames that were written and enlarges the file if necessary. Parameters ---------- data : buffer or bytes A buffer or bytes object containing the audio data to be written. dtype : {'float64', 'float32', 'int32', 'int16'} The data type of the audio data stored in *data*. See Also -------- .write, buffer_read rhN)rrrr)ryrarWrrrTrrbrbrc buffer_write0s  zSoundFile.buffer_writerc cstddl}d|jvrd|jvrtd|||}|dur:|dur%td|dur+|nt||} || ||}d} n|durBtdt|}d } d} |dkr| durUd} n t| } | |d| <t|| |} || ||||| d|r| dur| || d} n || d| dd<|||kr|dur|d||}n|}| r| |n|V|| 8}|dksNdSdS) aReturn a generator for block-wise reading. By default, the generator yields blocks of the given *blocksize* (using a given *overlap*) until the end of the file is reached; *frames* can be used to stop earlier. Parameters ---------- blocksize : int The number of frames to read per block. Either this or *out* must be given. overlap : int, optional The number of frames to rewind between each block. frames : int, optional The number of frames to read. If ``frames < 0``, the file is read until the end. dtype : {'float64', 'float32', 'int32', 'int16'}, optional See `read()`. Yields ------ `numpy.ndarray` or type(out) Blocks of audio data. If *out* was given, and the requested frames are not an integer multiple of the length of *out*, and no *fill_value* was given, the last block will be a smaller view into *out*. Other Parameters ---------------- always_2d, fill_value, out See `read()`. fill_value : float, optional See `read()`. out : `numpy.ndarray` or subclass, optional If *out* is specified, the data is written into the given array instead of creating a new array. In this case, the arguments *dtype* and *always_2d* are silently ignored! Examples -------- >>> from soundfile import SoundFile >>> with SoundFile('stereo_file.wav') as f: >>> for block in f.blocks(blocksize=1024): >>> pass # do something with 'block' rNrN+z*blocks() is not allowed in write-only modez)One of {blocksize, out} must be specifiedTz-Only one of {blocksize, out} may be specifiedF) rerSoundFileRuntimeErrorrrminrrrQcopy)ryrmrnrTrWrXrYrZrkZout_sizeZcopy_outZoverlap_memoryZ output_offsetZtoreadrorbrbrcrlKsF2  zSoundFile.blockscCsX|dur|}t|jtjtd|td}|r&t|j}t |d||j _ dS)anTruncate the file to a given number of frames. After this command, the read/write position will be at the new end of the file. Parameters ---------- frames : int, optional Only the data before *frames* is kept, the rest is deleted. If not specified, the current read/write position is used. Nz sf_count_t*Z sf_count_tzError truncating the file) rrrrZSFC_FILE_TRUNCATErrrrLibsndfileErrorrrT)ryrTrrbrbrctruncates      zSoundFile.truncatecCs|t|jdS)ajWrite unwritten data to the file system. 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Can be called multiple times.N)closedrrZsf_closerr)ryrrbrbrcrs   zSoundFile.closecCs0t|ttfrOtj|r/d|jvrtd|j t |j dr/t t |tjtjBtj}t|trGtjdkr@tj}n|t}||||j}n*t|tr^t|||j|}nt||rqt||||jtj}ntd|j |tjkrt |}t!|d|j d|tj"krd|j_#|S) z9Call the appropriate sf_open*() function from libsndfile.xzFile exists: {0!r}zw+rDzInvalid file: {0!r}zError opening {0!r}: prefixr)$ isinstance_unicodebytes_ospathisfilerOSErrorr\rsrrropenO_WRONLYO_TRUNCrZsf_open_sysplatformZ sf_wchar_openrgetfilesystemencodingrr?Z sf_open_fd_has_virtual_io_attrsZsf_open_virtual_init_virtual_iorrrrr SFM_WRITErT)ryrSrr_Z openfunctionZfile_ptrrrbrbrcrs2           zSoundFile._opencstdfdd}tdfdd}tdfdd }td fd d }td fdd}|||||d|_td|jS)z4Initialize callback functions for sf_open_virtual().Zsf_vio_get_filelencs,}dt}|t|SNr)rrrr) user_datacurrsizerSrbrcvio_get_filelens   z3SoundFile._init_virtual_io..vio_get_filelenZ sf_vio_seekcs||Srq)rr)offsetrrrrbrcvio_seeks z,SoundFile._init_virtual_io..vio_seekZ sf_vio_readcs\zt||}|}W|Sty-|}t|}t||}||d|<Y|Swr)rrreadintorrQr)ptrcountrbufZ data_readrarrbrcvio_read s    z,SoundFile._init_virtual_io..vio_readZ sf_vio_writecs2t||}|dd}|}|dur|}|Srq)rrrh)rrrrrarrrbrc vio_writes   z-SoundFile._init_virtual_io..vio_writeZ sf_vio_tellcsSrq)r)rrrbrcvio_tell!sz,SoundFile._init_virtual_io..vio_tell)Z get_filelenrrQrhrzSF_VIRTUAL_IO*)rcallbackZ _virtual_ior)ryrSrrrrr rbrrcrs"  zSoundFile._init_virtual_iocCstS)zReturn all attributes used in __setattr__ and __getattr__. This is useful for auto-completion (e.g. IPython). )rrrbrbrc_getAttributeNames.szSoundFile._getAttributeNamescCs|jrtddS)zCheck if the file is closed and raise an error if it is. This should be used in every method that uses self._file. zI/O operation on closed fileN)rrrrbrbrcr6szSoundFile._check_if_closedcCsJ|r|j|}|dks||kr|dur|}|S|dkr#td|S)z8Reduce frames to no more than are available in the file.rNz/frames must be specified for non-seekable files)rrTrr)ryrTrYZremaining_framesrbrbrcr?szSoundFile._check_framescCsV|tvsJt|tst|}tt||jt |\}}|r't d||fS)z1Convert buffer to cdata and check for valid size.z*Data size must be a multiple of frame size) _ffi_typesvaluesrrrZ from_bufferr|rr[rr)ryrarrT remainderrbrbrcrJs  zSoundFile._check_buffercCs8ddl}|s |jdkr||jf}n|f}|j||ddS)z-Create an empty array with appropriate shape.rNrC)order)rer[empty)ryrTrXrWrkrgrbrbrcrUs  zSoundFile._create_empty_arrayc Cs2zt|WStytdtt|w)z7Check if dtype string is valid and return ctype string.z(dtype must be one of {0!r} and not {1!r})r#KeyErrorrr\sortedkeys)ryrWrbrbrcr^s   zSoundFile._check_dtypecCs|jdvrtd|j|jdkrdd|jdkrdn|jd}||jkr3td|j|j||jjs;td||jj }|jj t |ksMJt |d|jd d }|||||S) z+Check array and call low-level IO function.)rrzInvalid shape: {0!r} ({1})rz0 dimensions not supportedztoo many dimensionsz5Invalid shape: {0!r} (Expected {1} channels, got {2})zData must be C-contiguous*rar)rfrr\rgr[flags c_contiguousrrWrsitemsizerrcastZ__array_interface__r)ryactionarrayrTZarray_channelsrrrbrbrcrfs $ zSoundFile._array_iocCsr|tvsJ||r|}ttd|d|}||j||}t|j |r7| ||t |S)z.Call one of libsndfile's read/write functions.Zsf_Zf_) r#r$rrrrrrrrrr)ryr1rarrTrfuncrbrbrcrts zSoundFile._cdata_iocCsD|r|}|dt|j_||tdS|jj|7_dS)z!Update self.frames after writing.rN)rrrrrrTr)ryrrrbrbrcrs zSoundFile._update_framescCs||dkr |s td|dkr|durtdt|||j\}}}||kr*|}|dkr2||}|r<||t|S)z)Seek to start frame and calculate length.rz(start is only allowed for seekable filesNz&Only one of {frames, stop} may be used)rrrsliceindicesrTrr)ryrUrVrT_rbrbrcrPs zSoundFile._prepare_readcCsBi}tD]\}}t|j|}|rt|dd||<q|S)a5Get all metadata present in this SoundFile Returns ------- metadata: dict[str, str] A dict with all metadata. Possible keys are: 'title', 'copyright', 'software', 'artist', 'comment', 'date', 'album', 'license', 'tracknumber' and 'genre'. rKrL)ritemsrrrrrr)rystrsZstrtypeZstridrarbrbrc copy_metadatas zSoundFile.copy_metadatacCsf|tvsJtd}t||d<t|jtj|t|}|tjkr1t |j}t |d|dS)z,Call libsndfile's set bitrate mode function.zint[1]rzError set bitrate mode N) _bitrate_modesrrrrrZSFC_SET_BITRATE_MODErrrr)ryrjZpointer_bitrate_moderrbrbrcrs     zSoundFile._set_bitrate_modecCszd|kr dkstdtdtd}||d<t|jtj|t|}|tjkr;t |j}t |d|dS)z1Call libsndfile's set compression level function.rrz)Compression level must be in range [0..1]z double[1]zError set compression level N) rrrrrrZSFC_SET_COMPRESSION_LEVELrrrr)ryriZpointer_compression_levelrrbrbrcrs   z SoundFile._set_compression_level) rNNNNNNTNN)rMr@FNN)rMN)NrrMr@FNNrq)t d|w|durFd}nt|ttfsTtd|z |t |O}Wnt ylt d|wt d}||_d |_t|tjkrt d |S) z8Return numeric ID for given format|subtype|endian combo.Nz)No default subtype for major format {0!r}zInvalid subtype: {0!r}zUnknown subtype: {0!r}r<zInvalid endian-ness: {0!r}zUnknown endian-ness: {0!r}SF_INFO*rz1Invalid combination of format, subtype and endian)rrrr\rrstr _subtypesrr)r_endiansrrr[rZsf_format_checkZSF_FALSE)r\r]r^resultrrbrbrcrs@   rcCst|ttfstd|t|}|dst|t|kr&td|t| ddkr3tdd|vr.z\Not allowed for existing files (except 'RAW'): samplerate, channels, format, subtype, endian)_get_format_from_filenamerrr<rrrrrrRr[rr\any) rSrrRr[r\r]r^Zoriginal_formatrrbrbrcrs(    rcCsrd}t|d|}ztj|ddd}|dd}Wn ty%Ynw|tvr7d|vr7td ||S) aReturn a format string obtained from file (or file.name). 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The return type will always be str or unicode (even if file/file.name is a bytes object). rrsrMrNrKrLrNzGNo format specified and unable to get format from file extension: {0!r}) rrrsplitextr Exceptionr_formatsrr\)rSrr\rbrbrcrDs  rDcCs:tttfD]}|D]\}}||kr|Sq qdS)z;Return the string representation of a given numeric format.zn/a)rHr=r>r7) format_int dictionarykvrbrbrcr1s rcCsTtd}||_ttj||td|j}t|j|r't | ddfSdfS)z6Return the ID and short description of a given format.zSF_FORMAT_INFO*ZSF_FORMAT_INFOrKrLr) rrr\rrrrrsrrr)rI format_flagrursrbrbrcr;s  rccsFtd}ttj||tdt|dD]}t||VqdS)z8Helper for available_formats() and available_subtypes().zint*r?rN)rrrrrrranger)Z count_flagrMrrIrbrbrcrFs  rcCsLt|ttfstd|z t|}W|Sty%td|w)z4Check if `format_str` is valid and return format ID.zInvalid format: {0!r}zUnknown format: {0!r}) rrr<rr\rHrr)r) format_strrIrbrbrcrNs rcCsN|tjk}|tjk}tt|dt|dt|dp|t|dp$t|dp$|gS)z>Check if file has all the necessary attributes for virtual IO.rrrhrQr)rrBrallr)rSrreadonlyZ writeonlyrbrbrcrYs   rc@eZdZdZdS)SoundFileErrorz-Base class for all soundfile-specific errors.NrrrrrbrbrbrcrSesrSc@rR)rzKsoundfile module runtime error. Errors that used to be `RuntimeError`.NrTrbrbrbrcrisrc@s.eZdZdZd ddZeddZddZd S) rzjlibsndfile errors. Attributes ---------- code libsndfile internal error number. rcCst|||||_||_dSrq)rrzcoder)ryrUrrbrbrcrzxs zLibsndfileError.__init__cCs(|jrt|j}t|ddSdS)zRaw libsndfile error message.rKrLz'(Garbled error message from libsndfile))rUrZsf_error_numberrrr)ryZerr_strrbrbrc error_string}s zLibsndfileError.error_stringcCs |j|jSrq)rrVrrbrbrc__str__rzLibsndfileError.__str__Nr)rrrrrzrrVrWrbrbrbrcros    r) rMrNr@FNNNNNNNT)NNNTNN)NrrMrNr@FNNNNNNNT)Frq)NNrX)Rr __version__osrsysr rrrZ ctypes.utilrZ _find_libraryZ _soundfilerrunicoder NameErrorr<rrHr=r>rr#r:r rCZ_machineZ_packaged_libnamerEZ _architecturerr\Z_soundfile_datardirname__file___pathrZ _full_pathZdlopenr ImportErrorrZ_libnameZ_explicit_libnameisdirZ _hbrew_pathrZsf_version_stringrZ__libsndfile_version__ startswithrrQrhrlrrprrrrrrOrrrrrDrZSFC_GET_FORMAT_INFOrrrrrGrS RuntimeErrorrrrbrbrbrcs<                !"&                      ] 9 ; 4