ó ˽÷Xc@`sýdZddlmZmZmZddlZddlZddlZddlZdddgZ de fd„ƒYZ dZ d Z d Ze e fZd „Zed „Zd „Zd„Zed„Zd„Zejdd krðd„Zn d„ZdS(s Module to read / write wav files using numpy arrays Functions --------- `read`: Return the sample rate (in samples/sec) and data from a WAV file. `write`: Write a numpy array as a WAV file. i(tdivisiontprint_functiontabsolute_importNtWavFileWarningtreadtwritecB`seZRS((t__name__t __module__(((s//tmp/pip-build-7oUkmx/scipy/scipy/io/wavfile.pyRsiiiþÿcC`sÀ|rd}nd}tj|d|jdƒƒd}}d}|dkr]tdƒ‚ntj|d|jdƒƒ}|d7}|\}}}} } } |tkrl|dkrltj|d |jd ƒƒd} |d 7}| d kr]|jd ƒ} |d 7}| dd!}|r$d }nd }|j|ƒritj|d|d ƒd}qiqltdƒ‚n|tkr‡tdƒ‚n||kr§|j||ƒn||||| | | fS(sÔ Returns ------- size : int size of format subchunk in bytes (minus 8 for "fmt " and itself) format_tag : int PCM, float, or compressed format channels : int number of channels fs : int sampling frequency in samples per second bytes_per_second : int overall byte rate for the file block_align : int bytes per sample, including all channels bit_depth : int bits per sample t>tIsIsIs!File format {}... not understood.iitWAVEsNot a WAV file.(RtFalsetTrueRtformattreprRR(Rtstr1RRt file_sizetstr2((s//tmp/pip-build-7oUkmx/scipy/scipy/io/wavfile.pyt_read_riff_chunks     # c C`st|dƒr|}t}nt|dƒ}z¤t|ƒ\}}t}d}d}t}xs|jƒ|krÏ|jdƒ} | s“tdƒ‚n!t| ƒdkr´tdƒ‚n| dkrt }t ||ƒ} | dd!\}}} | d }|dkrÌtdj |ƒƒ‚qÌq]| dkr8t ||ƒq]| dkrw|sYtdƒ‚nt ||||||ƒ} q]| dkr“t ||ƒq]| dkr¯t ||ƒq]tjdtƒt ||ƒq]WWdt|dƒsð|jƒn |jdƒX| | fS(sÔ Open a WAV file Return the sample rate (in samples/sec) and data from a WAV file. Parameters ---------- filename : string or open file handle Input wav file. mmap : bool, optional Whether to read data as memory-mapped. Only to be used on real files (Default: False). .. versionadded:: 0.12.0 Returns ------- rate : int Sample rate of wav file. data : numpy array Data read from wav file. Data-type is determined from the file; see Notes. Notes ----- This function cannot read wav files with 24-bit data. Common data types: [1]_ ===================== =========== =========== ============= WAV format Min Max NumPy dtype ===================== =========== =========== ============= 32-bit floating-point -1.0 +1.0 float32 32-bit PCM -2147483648 +2147483647 int32 16-bit PCM -32768 +32767 int16 8-bit PCM 0 255 uint8 ===================== =========== =========== ============= Note that 8-bit PCM is unsigned. References ---------- .. [1] IBM Corporation and Microsoft Corporation, "Multimedia Programming Interface and Data Specifications 1.0", section "Data Format of the Samples", August 1991 http://www-mmsp.ece.mcgill.ca/documents/audioformats/wave/Docs/riffmci.pdf RtrbiiisUnexpected end of file.sIncomplete wav chunk.sfmt iii i@i`i€s4Unsupported bit depth: the wav file has {}-bit data.tfactR5sNo fmt chunk before datatLISTtJUNKtFakes-Chunk (non-data) not understood, skipping it.Ni(iii i@i`i€(RGRH(thasattrR<topenRCR,R/RRtlenR=R%R>R8R7twarningstwarnRtcloseR1( tfilenameR3RRARtfmt_chunk_receivedRR Rtchunk_idt fmt_chunkRR5((s//tmp/pip-build-7oUkmx/scipy/scipy/io/wavfile.pyR´sT1           c C`søt|dƒr|}nt|dƒ}|}zš|jj}|dkpo|dkpo|dkoo|jjdksˆtd|jƒ‚nd}|d 7}|d 7}|d 7}|d 7}|dkrËt}nt}|jdkréd}n |j d}|jjd } || d |} || d } t j d|||| | | ƒ} |dkp\|dksl| d7} n|t j dt | ƒƒ7}|| 7}|dkp§|dks×|d7}|t j dd|j dƒ7}nt |ƒddd|j dkr tdƒ‚n|j|ƒ|jdƒ|jt j d|j ƒƒ|jjdkst|jjdkrƒtjdkrƒ|jƒ}nt||ƒ|jƒ} |jdƒ|jt j d| d ƒƒWdt|dƒsæ|jƒn |jdƒXdS(sm Write a numpy array as a WAV file. Parameters ---------- filename : string or open file handle Output wav file. rate : int The sample rate (in samples/sec). data : ndarray A 1-D or 2-D numpy array of either integer or float data-type. Notes ----- * Writes a simple uncompressed WAV file. * To write multiple-channels, use a 2-D array of shape (Nsamples, Nchannels). * The bits-per-sample and PCM/float will be determined by the data-type. Common data types: [1]_ ===================== =========== =========== ============= WAV format Min Max NumPy dtype ===================== =========== =========== ============= 32-bit floating-point -1.0 +1.0 float32 32-bit PCM -2147483648 +2147483647 int32 16-bit PCM -32768 +32767 int16 8-bit PCM 0 255 uint8 ===================== =========== =========== ============= Note that 8-bit PCM is unsigned. References ---------- .. [1] IBM Corporation and Microsoft Corporation, "Multimedia Programming Interface and Data Specifications 1.0", section "Data Format of the Samples", August 1991 http://www-mmsp.ece.mcgill.ca/documents/audioformats/wave/Docs/riffmci.pdf RtwbtitftuisUnsupported data type '%s'tR9tR;sfmt is s,       C #   h s