Method _validate_and_normalize_with_numpy

IPython/lib/display.py:154–173

(data, normalize)

    @staticmethod
    def _validate_and_normalize_with_numpy(data, normalize):
        import numpy as np

        data = np.array(data, dtype=float)
        if len(data.shape) == 1:
            nchan = 1
        elif len(data.shape) == 2:
            # In wave files,channels are interleaved. E.g.,
            # "L1R1L2R2..." for stereo. See
            # http://msdn.microsoft.com/en-us/library/windows/hardware/dn653308(v=vs.85).aspx
            # for channel ordering
            nchan = data.shape[0]
            data = data.T.ravel()
        else:
            raise ValueError('Array audio input must be a 1D or 2D array')
        
        max_abs_value = np.max(np.abs(data))
        normalization_factor = Audio._get_normalization_factor(max_abs_value, normalize)
        scaled = data / normalization_factor * 32767
        return scaled.astype('<h').tostring(), nchan


    @staticmethod