WavePlot.py 文件源码

def wave_plotting(sonic, block=False):
    if isinstance(sonic.wave_bin_data, list):
        bin_buffer = bytearray()
        for data in sonic.wave_bin_data:
            bin_buffer.extend(data)
        sonic.wave_bin_data = bytes(bin_buffer)
    elif not isinstance(sonic.wave_bin_data, bytes):
        raise Exception("Type of bin_data need bytes!")

    #?????????????????????????????????????
    wave_data = numpy.fromstring(sonic.wave_bin_data, dtype=number_type.get(sonic.sample_width))
    #???????wave_data??????short???????????????????????
    # ??????????????????LRLRLRLR....LR?L??????????R????????????wave_data?sharp
    wave_data.shape = (sonic.sample_length, sonic.channels)
    wave_data = wave_data.T
    time = numpy.arange(0, sonic.sample_length) * (1.0 / sonic.sample_frequency)

    # ????
    colors = ['b', 'g', 'r', 'c', 'm', 'y', 'k']
    pylab.figure()
    for index in range(0, sonic.channels):
        pylab.subplot(sonic.channels, 1, index + 1)
        pylab.plot(time, wave_data[index], colors[index % len(colors)])
    pylab.ylabel("quantization")
    pylab.xlabel("time (seconds)")
    pylab.ion()
    if block:
        pylab.ioff()
    pylab.show()