#!/usr/bin/env python
import pylab
import numpy as np
from amodem import common
from amodem.config import Configuration
import sys


def spectrogram(t, x, Fs, NFFT=256):
    ax1 = pylab.subplot(211)
    pylab.plot(t, x)

    pylab.subplot(212, sharex=ax1)
    pylab.specgram(x, NFFT=NFFT, Fs=Fs, noverlap=NFFT/2,
                   cmap=pylab.cm.gist_heat)


def main():
    config = Configuration()

    for fname in sys.argv[1:]:
        x = common.load(open(fname, 'rb'))
        t = np.arange(len(x)) * config.Ts
        pylab.figure()
        pylab.title(fname)
        spectrogram(t, x, config.Fs)

    pylab.show()

if __name__ == '__main__':
    main()