Python audioop.tostereo方法代码示例

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tostereo [as 别名]
def test_issue7673(self):
        state = None
        for data, size in INVALID_DATA:
            size2 = size
            self.assertRaises(audioop.error, audioop.getsample, data, size, 0)
            self.assertRaises(audioop.error, audioop.max, data, size)
            self.assertRaises(audioop.error, audioop.minmax, data, size)
            self.assertRaises(audioop.error, audioop.avg, data, size)
            self.assertRaises(audioop.error, audioop.rms, data, size)
            self.assertRaises(audioop.error, audioop.avgpp, data, size)
            self.assertRaises(audioop.error, audioop.maxpp, data, size)
            self.assertRaises(audioop.error, audioop.cross, data, size)
            self.assertRaises(audioop.error, audioop.mul, data, size, 1.0)
            self.assertRaises(audioop.error, audioop.tomono, data, size, 0.5, 0.5)
            self.assertRaises(audioop.error, audioop.tostereo, data, size, 0.5, 0.5)
            self.assertRaises(audioop.error, audioop.add, data, data, size)
            self.assertRaises(audioop.error, audioop.bias, data, size, 0)
            self.assertRaises(audioop.error, audioop.reverse, data, size)
            self.assertRaises(audioop.error, audioop.lin2lin, data, size, size2)
            self.assertRaises(audioop.error, audioop.ratecv, data, size, 1, 1, 1, state)
            self.assertRaises(audioop.error, audioop.lin2ulaw, data, size)
            self.assertRaises(audioop.error, audioop.lin2alaw, data, size)
            self.assertRaises(audioop.error, audioop.lin2adpcm, data, size, state) 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tostereo [as 别名]
def test_string(self):
        data = 'abcd'
        size = 2
        self.assertRaises(TypeError, audioop.getsample, data, size, 0)
        self.assertRaises(TypeError, audioop.max, data, size)
        self.assertRaises(TypeError, audioop.minmax, data, size)
        self.assertRaises(TypeError, audioop.avg, data, size)
        self.assertRaises(TypeError, audioop.rms, data, size)
        self.assertRaises(TypeError, audioop.avgpp, data, size)
        self.assertRaises(TypeError, audioop.maxpp, data, size)
        self.assertRaises(TypeError, audioop.cross, data, size)
        self.assertRaises(TypeError, audioop.mul, data, size, 1.0)
        self.assertRaises(TypeError, audioop.tomono, data, size, 0.5, 0.5)
        self.assertRaises(TypeError, audioop.tostereo, data, size, 0.5, 0.5)
        self.assertRaises(TypeError, audioop.add, data, data, size)
        self.assertRaises(TypeError, audioop.bias, data, size, 0)
        self.assertRaises(TypeError, audioop.reverse, data, size)
        self.assertRaises(TypeError, audioop.lin2lin, data, size, size)
        self.assertRaises(TypeError, audioop.ratecv, data, size, 1, 1, 1, None)
        self.assertRaises(TypeError, audioop.lin2ulaw, data, size)
        self.assertRaises(TypeError, audioop.lin2alaw, data, size)
        self.assertRaises(TypeError, audioop.lin2adpcm, data, size, None) 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tostereo [as 别名]
def normalize(self) -> 'Sample':
        """
        Normalize the sample, meaning: convert it to the default samplerate, sample width and number of channels.
        When mixing samples, they should all have the same properties, and this method is ideal to make sure of that.
        """
        if self.__locked:
            raise RuntimeError("cannot modify a locked sample")
        self.resample(params.norm_samplerate)
        if self.samplewidth != params.norm_samplewidth:
            # Convert to desired sample size.
            self.__frames = audioop.lin2lin(self.__frames, self.samplewidth, params.norm_samplewidth)
            self.__samplewidth = params.norm_samplewidth
        if params.norm_nchannels not in (1, 2):
            raise ValueError("norm_nchannels has invalid value, can only be 1 or 2")
        if self.nchannels == 1 and params.norm_nchannels == 2:
            # convert to stereo
            self.__frames = audioop.tostereo(self.__frames, self.samplewidth, 1, 1)
            self.__nchannels = 2
        elif self.nchannels == 2 and params.norm_nchannels == 1:
            # convert to mono
            self.__frames = audioop.tomono(self.__frames, self.__samplewidth, 1, 1)
            self.__nchannels = 1
        return self 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tostereo [as 别名]
def stereo(self, left_factor: float = 1.0, right_factor: float = 1.0) -> 'Sample':
        """
        Turn a mono sample into a stereo one with given factors/amplitudes for left and right channels.
        Note that it is a fast but simplistic conversion; the waveform in both channels is identical
        so you may suffer from phase cancellation when playing the resulting stereo sample.
        If the sample is already stereo, the left/right channel separation is changed instead.
        """
        if self.__locked:
            raise RuntimeError("cannot modify a locked sample")
        if self.__nchannels == 2:
            # first split the left and right channels and then remix them
            right = self.copy().right()
            self.left().amplify(left_factor)
            return self.stereo_mix(right, 'R', right_factor)
        if self.__nchannels == 1:
            self.__frames = audioop.tostereo(self.__frames, self.__samplewidth, left_factor, right_factor)
            self.__nchannels = 2
            return self
        raise ValueError("sample must be mono or stereo") 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tostereo [as 别名]
def test_tostereo(self):
        for w in 1, 2, 4:
            data1 = datas[w]
            data2 = bytearray(2 * len(data1))
            for k in range(w):
                data2[k::2*w] = data1[k::w]
            self.assertEqual(audioop.tostereo(data1, w, 1, 0), data2)
            self.assertEqual(audioop.tostereo(data1, w, 0, 0), b'\0' * len(data2))
            for k in range(w):
                data2[k+w::2*w] = data1[k::w]
            self.assertEqual(audioop.tostereo(data1, w, 1, 1), data2) 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tostereo [as 别名]
def test_tostereo(self):
        for w in 1, 2, 3, 4:
            data1 = datas[w]
            data2 = bytearray(2 * len(data1))
            for k in range(w):
                data2[k::2*w] = data1[k::w]
            self.assertEqual(audioop.tostereo(data1, w, 1, 0), data2)
            self.assertEqual(audioop.tostereo(data1, w, 0, 0), b'\0' * len(data2))
            for k in range(w):
                data2[k+w::2*w] = data1[k::w]
            self.assertEqual(audioop.tostereo(data1, w, 1, 1), data2)
            self.assertEqual(audioop.tostereo(bytearray(data1), w, 1, 1), data2)
            self.assertEqual(audioop.tostereo(memoryview(data1), w, 1, 1),
                             data2) 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tostereo [as 别名]
def testtostereo(data):
    if verbose:
        print 'tostereo'
    data2 = ''
    for d in data[0]:
        data2 = data2 + d + d
    if audioop.tostereo(data[0], 1, 1, 1) != data2:
        return 0
    return 1