Python audioop.tomono方法代码示例

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tomono [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 tomono [as 别名]
def _play(self, data, rate=16000, channels=1, width=2, spectrum=True):
        stream = self.pyaudio_instance.open(
            format=self.pyaudio_instance.get_format_from_width(width),
            channels=channels,
            rate=rate,
            output=True,
            # output_device_index=1,
            frames_per_buffer=CHUNK_SIZE,
        )

        if isinstance(data, types.GeneratorType):
            for d in data:
                if self.stop_event.is_set():
                    break

                stream.write(d)

                if spectrum:
                    if channels == 2:
                        d = audioop.tomono(d, 2, 0.5, 0.5)
                    self.queue.put(d)
        else:
            stream.write(data)

        stream.close() 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tomono [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 tomono [as 别名]
def __db_level(self, rms_mode: bool = False) -> Tuple[float, float]:
        """
        Returns the average audio volume level measured in dB (range -60 db to 0 db)
        If the sample is stereo, you get back a tuple: (left_level, right_level)
        If the sample is mono, you still get a tuple but both values will be the same.
        This method is probably only useful if processed on very short sample fragments in sequence,
        so the db levels could be used to show a level meter for the duration of the sample.
        """
        maxvalue = 2**(8*self.__samplewidth-1)
        if self.nchannels == 1:
            if rms_mode:
                peak_left = peak_right = (audioop.rms(self.__frames, self.__samplewidth)+1)/maxvalue
            else:
                peak_left = peak_right = (audioop.max(self.__frames, self.__samplewidth)+1)/maxvalue
        else:
            left_frames = audioop.tomono(self.__frames, self.__samplewidth, 1, 0)
            right_frames = audioop.tomono(self.__frames, self.__samplewidth, 0, 1)
            if rms_mode:
                peak_left = (audioop.rms(left_frames, self.__samplewidth)+1)/maxvalue
                peak_right = (audioop.rms(right_frames, self.__samplewidth)+1)/maxvalue
            else:
                peak_left = (audioop.max(left_frames, self.__samplewidth)+1)/maxvalue
                peak_right = (audioop.max(right_frames, self.__samplewidth)+1)/maxvalue
        # cut off at the bottom at -60 instead of all the way down to -infinity
        return max(20.0*math.log(peak_left, 10), -60.0), max(20.0*math.log(peak_right, 10), -60.0) 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tomono [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 tomono [as 别名]
def convert_stereo_to_mono(fragment, width):
    """
    Convert stereo fragment to mono.

    Parameters
    ----------
    fragment : bytes object
        Specifies the original fragment.
    width : int
        Specifies the fragment's original sampwidth.

    Returns
    -------
    bytes
        Converted audio in mono type.

    """
    new_fragment = audioop.tomono(fragment, width, 0.5, 0.5)
    return new_fragment 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tomono [as 别名]
def mic_to_ws():  # uses stream
            try:
                print >> sys.stderr, "\nLISTENING TO MICROPHONE"
                last_state = None
                while True:
                    data = stream.read(self.chunk)
                    if self.audio_gate > 0:
                        rms = audioop.rms(data, 2)
                        if rms < self.audio_gate:
                            data = '\00' * len(data)
                    #if sample_chan == 2:
                    #    data = audioop.tomono(data, 2, 1, 1)
                    if sample_rate != self.byterate:
                        (data, last_state) = audioop.ratecv(data, 2, 1, sample_rate, self.byterate, last_state)

                    self.send_data(data)
            except IOError, e:
                # usually a broken pipe
                print e 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tomono [as 别名]
def read(self, size = -1):
            buffer = self.audio_reader.readframes(self.audio_reader.getnframes() if size == -1 else size)
            if not isinstance(buffer, bytes): buffer = b"" # workaround for https://bugs.python.org/issue24608

            sample_width = self.audio_reader.getsampwidth()
            if not self.little_endian: # big endian format, convert to little endian on the fly
                if hasattr(audioop, "byteswap"): # ``audioop.byteswap`` was only added in Python 3.4 (incidentally, that also means that we don't need to worry about 24-bit audio being unsupported, since Python 3.4+ always has that functionality)
                    buffer = audioop.byteswap(buffer, sample_width)
                else: # manually reverse the bytes of each sample, which is slower but works well enough as a fallback
                    buffer = buffer[sample_width - 1::-1] + b"".join(buffer[i + sample_width:i:-1] for i in range(sample_width - 1, len(buffer), sample_width))

            # workaround for https://bugs.python.org/issue12866
            if self.samples_24_bit_pretending_to_be_32_bit: # we need to convert samples from 24-bit to 32-bit before we can process them with ``audioop`` functions
                buffer = b"".join("\x00" + buffer[i:i + sample_width] for i in range(0, len(buffer), sample_width)) # since we're in little endian, we prepend a zero byte to each 24-bit sample to get a 32-bit sample
            if self.audio_reader.getnchannels() != 1: # stereo audio
                buffer = audioop.tomono(buffer, sample_width, 1, 1) # convert stereo audio data to mono
            return buffer 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tomono [as 别名]
def test_tomono(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.tomono(str(data2), w, 1, 0), data1)
            self.assertEqual(audioop.tomono(str(data2), w, 0, 1), b'\0' * len(data1))
            for k in range(w):
                data2[k+w::2*w] = data1[k::w]
            self.assertEqual(audioop.tomono(str(data2), w, 0.5, 0.5), data1) 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tomono [as 别名]
def _convert_file(self, src, dest=None):
        """
        convert wav into 8khz rate
        """
        def convert(read,write):
            write.setparams((1, 2, 8000, 0,'NONE', 'not compressed'))

            o_fr = read.getframerate()
            o_chnl = read.getnchannels()
            t_fr = read.getnframes()
            data = read.readframes(t_fr)
            cnvrt = audioop.ratecv(data, 2, o_chnl,
                                   o_fr, 8000, None)
            if o_chnl != 1:
                mono = audioop.tomono(cnvrt[0], 2, 1, 0)
                write.writeframes(mono)
            else:
                write.writeframes(cnvrt[0])
            read.close()
            write.close()

        if dest is None:
            temp = src + '.temp'
            os.rename(src, temp)
            read = wave.open(temp, 'r')
            write = wave.open(src, 'w')
            convert(read, write)
            os.remove(temp)
        else:
            read = wave.open(src, 'r')
            write = wave.open(dest, 'w')
            convert(read, write) 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tomono [as 别名]
def test_tomono(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.tomono(data2, w, 1, 0), data1)
            self.assertEqual(audioop.tomono(data2, w, 0, 1), b'\0' * len(data1))
            for k in range(w):
                data2[k+w::2*w] = data1[k::w]
            self.assertEqual(audioop.tomono(data2, w, 0.5, 0.5), data1)
            self.assertEqual(audioop.tomono(bytearray(data2), w, 0.5, 0.5),
                             data1)
            self.assertEqual(audioop.tomono(memoryview(data2), w, 0.5, 0.5),
                             data1) 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tomono [as 别名]
def mono(self, left_factor: float = 1.0, right_factor: float = 1.0) -> 'Sample':
        """Make the sample mono (1-channel) applying the given left/right channel factors when downmixing"""
        if self.__locked:
            raise RuntimeError("cannot modify a locked sample")
        if self.__nchannels == 1:
            return self
        if self.__nchannels == 2:
            self.__frames = audioop.tomono(self.__frames, self.__samplewidth, left_factor, right_factor)
            self.__nchannels = 1
            return self
        raise ValueError("sample must be stereo or mono already") 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tomono [as 别名]
def testtomono(data):
    if verbose:
        print 'tomono'
    data2 = ''
    for d in data[0]:
        data2 = data2 + d + d
    if audioop.tomono(data2, 1, 0.5, 0.5) != data[0]:
        return 0
    return 1 

# 需要导入模块: import audioop [as 别名]
# 或者: from audioop import tomono [as 别名]
def average_channels_stereo(data, sample_width):
    fmt = FORMAT[sample_width]
    arr = array(fmt, audioop.tomono(data, sample_width, 0.5, 0.5))
    return arr