U Z$d9@slddlZddlZddlZddlZddlZddlZddlZddlZddlZGddde Z ddZ ddZ dS)Nc@sJeZdZdZddZdddZdddZdd d Zdd d Zdd dZ dS) AudioDataa Creates a new ``AudioData`` instance, which represents mono audio data. The raw audio data is specified by ``frame_data``, which is a sequence of bytes representing audio samples. This is the frame data structure used by the PCM WAV format. The width of each sample, in bytes, is specified by ``sample_width``. Each group of ``sample_width`` bytes represents a single audio sample. The audio data is assumed to have a sample rate of ``sample_rate`` samples per second (Hertz). Usually, instances of this class are obtained from ``recognizer_instance.record`` or ``recognizer_instance.listen``, or in the callback for ``recognizer_instance.listen_in_background``, rather than instantiating them directly. cCsT|dkstd|ddkr2d|kr0dks:ntd||_||_t||_dS)Nrz&Sample rate must be a positive integerz.Sample width must be between 1 and 4 inclusive)AssertionError frame_data sample_rateint sample_width)selfrrr r `__. Nrz4Sample rate to convert to must be a positive integerrrzssz)AudioData.get_raw_data..) rrr audioopZbiasrZratecvZlin2linerrorjoinranger)r convert_rate convert_width_r rr get_raw_data@s       zAudioData.get_raw_datac Cs|||}|dkr|jn|}|dkr,|jn|}tR}t|d}z4||| || d| || }W5|XW5QRX|S)a! Returns a byte string representing the contents of a WAV file containing the audio represented by the ``AudioData`` instance. If ``convert_width`` is specified and the audio samples are not ``convert_width`` bytes each, the resulting audio is converted to match. If ``convert_rate`` is specified and the audio sample rate is not ``convert_rate`` Hz, the resulting audio is resampled to match. Writing these bytes directly to a file results in a valid `WAV file `__. Nwbr) r rr ioBytesIOwaveopenclose setframerate setsampwidth setnchannels writeframesgetvalue) r rrrrr Zwav_fileZ wav_writerwav_datar r r get_wav_datas        zAudioData.get_wav_datac s||||dkr|jn|}|dkr,|jn|ttdrHtn<ddddfddtdtDt R}t |d}z4||||d||}W5| XW5QRX|S) aB Returns a byte string representing the contents of an AIFF-C file containing the audio represented by the ``AudioData`` instance. If ``convert_width`` is specified and the audio samples are not ``convert_width`` bytes each, the resulting audio is converted to match. If ``convert_rate`` is specified and the audio sample rate is not ``convert_rate`` Hz, the resulting audio is resampled to match. Writing these bytes directly to a file results in a valid `AIFF-C file `__. Nbyteswaprrc3s |]}||dVqdS)r/Nr rrr r r rsz*AudioData.get_aiff_data..r!)r rr hasattrrr.rrrr"r#aifcr%r&r'r(r)r*r+)r rrrZ aiff_fileZ aiff_writerZ aiff_datar r0r get_aiff_datas.          zAudioData.get_aiff_datac Cs|dks2|ddkr*d|kr(dks2ntd|jdkrH|dkrHd}|||}t}tjdkrt}|jtj O_tj |_ nd}tj |ddd d gtj tj |d }||\}}|S) a Returns a byte string representing the contents of a FLAC file containing the audio represented by the ``AudioData`` instance. Note that 32-bit FLAC is not supported. If the audio data is 32-bit and ``convert_width`` is not specified, then the resulting FLAC will be a 24-bit FLAC. If ``convert_rate`` is specified and the audio sample rate is not ``convert_rate`` Hz, the resulting audio is resampled to match. If ``convert_width`` is specified and the audio samples are not ``convert_width`` bytes each, the resulting audio is converted to match. Writing these bytes directly to a file results in a valid `FLAC file `__. NrrrzAMD64i686i786x86_64x86zflac-win32.exeDarwinzflac-macLinux>rMrJrKzflac-linux-x86>rLrIzflac-linux-x86_64zFLAC conversion utility not available - consider installing the FLAC command line application by running `apt-get install flac` or your operating system's equivalent)rrsync) shutil_whichr:pathdirnameabspath__file__platformsystemmachinerOSErroraccessX_OKstatchmodst_modeS_IEXECsys version_inforP)r@ base_pathrWrX stat_infor r r r9s4  "r9cCsRtd}|tjjD]4}tj||}tj|rt|tjr|SqdS)zDPython 2 compatibility: backport of ``shutil.which()`` from Python 3PATHN) r:getenvsplitrRpathseprexistsrZr[)ZpgmrRpr r r rQ7s  rQ) r2rr"r:rVr\r<r`r$objectrr9rQr r r r sz2