python类lin2adpcm()的实例源码

def test_lin2adpcm(self):
        self.assertEqual(audioop.lin2adpcm(datas[1], 1, None),
                         (b'\x07\x7f\x7f', (-221, 39)))
        self.assertEqual(audioop.lin2adpcm(bytearray(datas[1]), 1, None),
                         (b'\x07\x7f\x7f', (-221, 39)))
        self.assertEqual(audioop.lin2adpcm(memoryview(datas[1]), 1, None),
                         (b'\x07\x7f\x7f', (-221, 39)))
        for w in 2, 3, 4:
            self.assertEqual(audioop.lin2adpcm(datas[w], w, None),
                             (b'\x07\x7f\x7f', (31, 39)))

        # Very cursory test
        for w in 1, 2, 3, 4:
            self.assertEqual(audioop.lin2adpcm(b'\0' * w * 10, w, None),
                             (b'\0' * 5, (0, 0)))

def test_invalid_adpcm_state(self):
        # state must be a tuple or None, not an integer
        self.assertRaises(TypeError, audioop.adpcm2lin, b'\0', 1, 555)
        self.assertRaises(TypeError, audioop.lin2adpcm, b'\0', 1, 555)

def _lin2adpcm(self, data):
        import audioop
        if not hasattr(self, '_adpcmstate'):
            self._adpcmstate = None
        data, self._adpcmstate = audioop.lin2adpcm(data, 2, self._adpcmstate)
        return data