Python ctypes.c_ubyte() Examples

def _generate_data(self, bytes, offset):
        if self._bytes_per_sample == 1:
            start = offset
            samples = bytes
            bias = 127
            amplitude = 127
            data = (ctypes.c_ubyte * samples)()
        else:
            start = offset >> 1
            samples = bytes >> 1
            bias = 0
            amplitude = 32767
            data = (ctypes.c_short * samples)()
        step = self.frequency * (math.pi * 2) / self.audio_format.sample_rate
        for i in range(samples):
            data[i] = int(math.sin(step * (i + start)) * amplitude + bias)
        return data 

def simxReadVisionSensor(clientID, sensorHandle, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''

    detectionState = ct.c_ubyte()
    auxValues      = ct.POINTER(ct.c_float)()
    auxValuesCount = ct.POINTER(ct.c_int)()
    ret = c_ReadVisionSensor(clientID, sensorHandle, ct.byref(detectionState), ct.byref(auxValues), ct.byref(auxValuesCount), operationMode)
    
    auxValues2 = []
    if ret == 0:
        s = 0
        for i in range(auxValuesCount[0]):
            auxValues2.append(auxValues[s:s+auxValuesCount[i+1]])
            s += auxValuesCount[i+1]

        #free C buffers
        c_ReleaseBuffer(auxValues)
        c_ReleaseBuffer(auxValuesCount)

    return ret, bool(detectionState.value!=0), auxValues2 

def simxReadProximitySensor(clientID, sensorHandle, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''

    detectionState = ct.c_ubyte()
    detectedObjectHandle = ct.c_int()
    detectedPoint  = (ct.c_float*3)()
    detectedSurfaceNormalVector = (ct.c_float*3)()
    ret = c_ReadProximitySensor(clientID, sensorHandle, ct.byref(detectionState), detectedPoint, ct.byref(detectedObjectHandle), detectedSurfaceNormalVector, operationMode)
    arr1 = []
    for i in range(3):
        arr1.append(detectedPoint[i])
    arr2 = []
    for i in range(3):
        arr2.append(detectedSurfaceNormalVector[i])
    return ret, bool(detectionState.value!=0), arr1, detectedObjectHandle.value, arr2 

def simxReadForceSensor(clientID, forceSensorHandle, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''
    state = ct.c_ubyte()
    forceVector  = (ct.c_float*3)()
    torqueVector = (ct.c_float*3)()
    ret = c_ReadForceSensor(clientID, forceSensorHandle, ct.byref(state), forceVector, torqueVector, operationMode)
    arr1 = []
    for i in range(3):
        arr1.append(forceVector[i])
    arr2 = []
    for i in range(3):
        arr2.append(torqueVector[i])
    if sys.version_info[0] == 3:
        state=state.value
    else:
        state=ord(state.value)
    return ret, state, arr1, arr2 

def encrypt_ige(plain_text, key, iv):
        aes_key = AES_KEY()
        key_len = ctypes.c_int(8 * len(key))
        key = (ctypes.c_ubyte * len(key))(*key)
        iv = (ctypes.c_ubyte * len(iv))(*iv)

        in_len = ctypes.c_size_t(len(plain_text))
        in_ptr = (ctypes.c_ubyte * len(plain_text))(*plain_text)
        out_ptr = (ctypes.c_ubyte * len(plain_text))()

        _libssl.AES_set_encrypt_key(key, key_len, ctypes.byref(aes_key))
        _libssl.AES_ige_encrypt(
            ctypes.byref(in_ptr),
            ctypes.byref(out_ptr),
            in_len,
            ctypes.byref(aes_key),
            ctypes.byref(iv),
            AES_ENCRYPT
        )

        return bytes(out_ptr) 

def writer(ring, start, count):
    for i in range(start, start + count):
        data = os.urandom(random.randint(1, 1000))
        time_micros = int(time.time() * 10**6)
        record = Record(
            write_number=i,
            timestamp_microseconds=time_micros,
            length=len(data))
        # Note: You can't pass 'data' to the constructor without doing an
        # additional copy to convert the bytes type to a c_ubyte * 1000. So
        # instead, the constructor will initialize the 'data' field's bytes
        # to zero, and then this assignment overwrites the data-sized part.
        record.data[:len(data)] = data

        try:
            ring.try_write(record)
        except ringbuffer.WaitingForReaderError:
            print('Reader is too slow, dropping %d' % i)
            continue

        if i and i % 100 == 0:
            print('Wrote %d so far' % i)

    ring.writer_done()
    print('Writer is done') 

def __init__(self, logger, buf, media_id, stream, yuv_packed_buffer_pool,
                 session_metadata):
        self.logger = logger
        self._buf = buf
        self._media_id = media_id
        self._stream = stream
        self._yuv_packed_buffer_pool = yuv_packed_buffer_pool
        self._session_metadata = session_metadata
        self._pdraw_video_frame = od.POINTER_T(ctypes.c_ubyte)()
        self._frame_pointer = ctypes.POINTER(ctypes.c_ubyte)()
        self._frame_size = 0
        self._frame_array = None
        self._yuv_packed_buffer = od.POINTER_T(od.struct_vbuf_buffer)()
        self._yuv_packed_video_frame_storage = od.struct_pdraw_video_frame()
        self._yuv_packed_video_frame = od.POINTER_T(
            od.struct_pdraw_video_frame)()
        self._frame_info = None
        self._metadata_pointers = [] 

def __init__(self, eventHandler, freq, gain, cal):
        threading.Thread.__init__(self)
        self.name = 'Receive'
        self.daemon = True

        self._cancel = False
        self._freq = freq
        self._gain = gain
        self._cal = cal
        self._eventHandler = eventHandler
        self._sdr = None
        self._capture = (ctypes.c_ubyte * SAMPLES)()

        devices = rtlsdr.librtlsdr.rtlsdr_get_device_count()
        if devices == 0:
            event = Event(Events.SCAN_ERROR, msg='No device found')
            post_event(eventHandler, event)
        else:
            self.start() 

def MessageClass(length=DMX_LENGTH):
    assert 0 <= length <= DMX_LENGTH
    assert length % 2 == 0, 'artnet only takes messages of even length'

    Char, Int8, Int16 = ctypes.c_char, ctypes.c_ubyte, ctypes.c_ushort

    class DMXMessage(ctypes.Structure):
        # http://artisticlicence.com/WebSiteMaster/User%20Guides/art-net.pdf p47
        _fields_ = [
            ('id', Char * 8),
            ('opCode', Int16),
            ('protVerHi', Int8),
            ('protVerLo', Int8),
            ('sequence', Int8),
            ('physical', Int8),
            ('subUni', Int8),
            ('net', Int8),
            ('lengthHi', Int8),
            ('length', Int8),
            ('data', Int8 * length),  # At position 18
        ]

    return DMXMessage 

def decode_bitfields(bits, r_mask, g_mask, b_mask,
                     width, height, pitch, pitch_sign):
    r_shift1, r_shift2 = get_shift(r_mask)
    g_shift1, g_shift2 = get_shift(g_mask)
    b_shift1, b_shift2 = get_shift(b_mask)

    rgb_pitch = 3 * len(bits[0])
    buffer = (ctypes.c_ubyte * (height * rgb_pitch))()

    i = 0
    for row in bits:
        for packed in row:
            buffer[i] = (packed & r_mask) >> r_shift1 << r_shift2
            buffer[i+1] = (packed & g_mask) >> g_shift1 << g_shift2
            buffer[i+2] = (packed & b_mask) >> b_shift1 << b_shift2
            i += 3

    return ImageData(width, height, 'RGB', buffer, pitch_sign * rgb_pitch) 

def simxReadStringStream(clientID, signalName, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''

    signalLength = ct.c_int();
    signalValue = ct.POINTER(ct.c_ubyte)()
    if (sys.version_info[0] == 3) and (type(signalName) is str):
        signalName=signalName.encode('utf-8')
    ret = c_ReadStringStream(clientID, signalName, ct.byref(signalValue), ct.byref(signalLength), operationMode)

    a = bytearray()
    if ret == 0:
        for i in range(signalLength.value):
            a.append(signalValue[i])
    if sys.version_info[0] != 3:
        a=str(a)

    return ret, a 

def simxAppendStringSignal(clientID, signalName, signalValue, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''

    sigV=signalValue
    if sys.version_info[0] == 3:
        if type(signalName) is str:
            signalName=signalName.encode('utf-8')
        if type(signalValue) is bytearray:
            sigV  = (ct.c_ubyte*len(signalValue))(*signalValue)
        if type(signalValue) is str:
            signalValue=signalValue.encode('utf-8')
            sigV  = (ct.c_ubyte*len(signalValue))(*signalValue)
    else:
        if type(signalValue) is bytearray:
            sigV = (ct.c_ubyte*len(signalValue))(*signalValue)
        if type(signalValue) is str:
            signalValue=bytearray(signalValue)
            sigV = (ct.c_ubyte*len(signalValue))(*signalValue)
    sigV=ct.cast(sigV,ct.POINTER(ct.c_ubyte)) # IronPython needs this
    return c_AppendStringSignal(clientID, signalName, sigV, len(signalValue), operationMode) 

def simxWriteStringStream(clientID, signalName, signalValue, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''

    sigV=signalValue
    if sys.version_info[0] == 3:
        if type(signalName) is str:
            signalName=signalName.encode('utf-8')
        if type(signalValue) is bytearray:
            sigV  = (ct.c_ubyte*len(signalValue))(*signalValue)
        if type(signalValue) is str:
            signalValue=signalValue.encode('utf-8')
            sigV  = (ct.c_ubyte*len(signalValue))(*signalValue)
    else:
        if type(signalValue) is bytearray:
            sigV = (ct.c_ubyte*len(signalValue))(*signalValue)
        if type(signalValue) is str:
            signalValue=bytearray(signalValue)
            sigV = (ct.c_ubyte*len(signalValue))(*signalValue)
    sigV=ct.cast(sigV,ct.POINTER(ct.c_ubyte)) # IronPython needs this
    return c_WriteStringStream(clientID, signalName, sigV, len(signalValue), operationMode) 

def _generate_data(self, bytes, offset):
        # XXX TODO consider offset
        if self._bytes_per_sample == 1:
            samples = bytes
            value = 0
            amplitude = 255
            data = (ctypes.c_ubyte * samples)()
        else:
            samples = bytes >> 1
            value = -32768
            amplitude = 65535
            data = (ctypes.c_short * samples)()
        period = self.audio_format.sample_rate / self.frequency / 2
        count = 0
        for i in range(samples):
            count += 1
            if count == period:
                value = amplitude - value
                count = 0
            data[i] = value
        return data 

def simxReadForceSensor(clientID, forceSensorHandle, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''
    state = ct.c_ubyte()
    forceVector  = (ct.c_float*3)()
    torqueVector = (ct.c_float*3)()
    ret = c_ReadForceSensor(clientID, forceSensorHandle, ct.byref(state), forceVector, torqueVector, operationMode)
    arr1 = []
    for i in range(3):
        arr1.append(forceVector[i])
    arr2 = []
    for i in range(3):
        arr2.append(torqueVector[i])
    #if sys.version_info[0] == 3:
    #    state=state.value
    #else:
    #    state=ord(state.value)
    return ret, state.value, arr1, arr2 

def decrypt_ige(cipher_text, key, iv):
        aes_key = AES_KEY()
        key_len = ctypes.c_int(8 * len(key))
        key = (ctypes.c_ubyte * len(key))(*key)
        iv = (ctypes.c_ubyte * len(iv))(*iv)

        in_len = ctypes.c_size_t(len(cipher_text))
        in_ptr = (ctypes.c_ubyte * len(cipher_text))(*cipher_text)
        out_ptr = (ctypes.c_ubyte * len(cipher_text))()

        _libssl.AES_set_decrypt_key(key, key_len, ctypes.byref(aes_key))
        _libssl.AES_ige_encrypt(
            ctypes.byref(in_ptr),
            ctypes.byref(out_ptr),
            in_len,
            ctypes.byref(aes_key),
            ctypes.byref(iv),
            AES_DECRYPT
        )

        return bytes(out_ptr) 

def simxReadProximitySensor(clientID, sensorHandle, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''

    detectionState = ct.c_ubyte()
    detectedObjectHandle = ct.c_int()
    detectedPoint  = (ct.c_float*3)()
    detectedSurfaceNormalVector = (ct.c_float*3)()
    ret = c_ReadProximitySensor(clientID, sensorHandle, ct.byref(detectionState), detectedPoint, ct.byref(detectedObjectHandle), detectedSurfaceNormalVector, operationMode)
    arr1 = []
    for i in range(3):
        arr1.append(detectedPoint[i])
    arr2 = []
    for i in range(3):
        arr2.append(detectedSurfaceNormalVector[i])
    return ret, bool(detectionState.value!=0), arr1, detectedObjectHandle.value, arr2 

def decode_bitfields(bits, r_mask, g_mask, b_mask,
                     width, height, pitch, pitch_sign):
    r_shift1, r_shift2 = get_shift(r_mask)
    g_shift1, g_shift2 = get_shift(g_mask)
    b_shift1, b_shift2 = get_shift(b_mask)

    rgb_pitch = 3 * len(bits[0])
    buffer = (ctypes.c_ubyte * (height * rgb_pitch))()

    i = 0
    for row in bits:
        for packed in row:
            buffer[i] = (packed & r_mask) >> r_shift1 << r_shift2
            buffer[i+1] = (packed & g_mask) >> g_shift1 << g_shift2
            buffer[i+2] = (packed & b_mask) >> b_shift1 << b_shift2
            i += 3

    return ImageData(width, height, 'RGB', buffer, pitch_sign * rgb_pitch) 

def simxGetAndClearStringSignal(clientID, signalName, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''

    signalLength = ct.c_int();
    signalValue = ct.POINTER(ct.c_ubyte)()
    if (sys.version_info[0] == 3) and (type(signalName) is str):
        signalName=signalName.encode('utf-8')
    ret = c_GetAndClearStringSignal(clientID, signalName, ct.byref(signalValue), ct.byref(signalLength), operationMode)

    a = bytearray()
    if ret == 0:
        for i in range(signalLength.value):
            a.append(signalValue[i])
    if sys.version_info[0] != 3:
        a=str(a)

    return ret, a 

def simxReadStringStream(clientID, signalName, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''

    signalLength = ct.c_int();
    signalValue = ct.POINTER(ct.c_ubyte)()
    if (sys.version_info[0] == 3) and (type(signalName) is str):
        signalName=signalName.encode('utf-8')
    ret = c_ReadStringStream(clientID, signalName, ct.byref(signalValue), ct.byref(signalLength), operationMode)

    a = bytearray()
    if ret == 0:
        for i in range(signalLength.value):
            a.append(signalValue[i])
    if sys.version_info[0] != 3:
        a=str(a)

    return ret, a 

def simxSetStringSignal(clientID, signalName, signalValue, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''

    sigV=signalValue
    if sys.version_info[0] == 3:
        if type(signalName) is str:
            signalName=signalName.encode('utf-8')
        if type(signalValue) is bytearray:
            sigV  = (ct.c_ubyte*len(signalValue))(*signalValue)
        if type(signalValue) is str:
            signalValue=signalValue.encode('utf-8')
            sigV  = (ct.c_ubyte*len(signalValue))(*signalValue)
    else:
        if type(signalValue) is bytearray:
            sigV = (ct.c_ubyte*len(signalValue))(*signalValue)
        if type(signalValue) is str:
            signalValue=bytearray(signalValue)
            sigV = (ct.c_ubyte*len(signalValue))(*signalValue)
    sigV=ct.cast(sigV,ct.POINTER(ct.c_ubyte)) # IronPython needs this
    return c_SetStringSignal(clientID, signalName, sigV, len(signalValue), operationMode) 

def simxAppendStringSignal(clientID, signalName, signalValue, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''

    sigV=signalValue
    if sys.version_info[0] == 3:
        if type(signalName) is str:
            signalName=signalName.encode('utf-8')
        if type(signalValue) is bytearray:
            sigV  = (ct.c_ubyte*len(signalValue))(*signalValue)
        if type(signalValue) is str:
            signalValue=signalValue.encode('utf-8')
            sigV  = (ct.c_ubyte*len(signalValue))(*signalValue)
    else:
        if type(signalValue) is bytearray:
            sigV = (ct.c_ubyte*len(signalValue))(*signalValue)
        if type(signalValue) is str:
            signalValue=bytearray(signalValue)
            sigV = (ct.c_ubyte*len(signalValue))(*signalValue)
    sigV=ct.cast(sigV,ct.POINTER(ct.c_ubyte)) # IronPython needs this
    return c_AppendStringSignal(clientID, signalName, sigV, len(signalValue), operationMode) 

def simxWriteStringStream(clientID, signalName, signalValue, operationMode):
    '''
    Please have a look at the function description/documentation in the V-REP user manual
    '''

    sigV=signalValue
    if sys.version_info[0] == 3:
        if type(signalName) is str:
            signalName=signalName.encode('utf-8')
        if type(signalValue) is bytearray:
            sigV  = (ct.c_ubyte*len(signalValue))(*signalValue)
        if type(signalValue) is str:
            signalValue=signalValue.encode('utf-8')
            sigV  = (ct.c_ubyte*len(signalValue))(*signalValue)
    else:
        if type(signalValue) is bytearray:
            sigV = (ct.c_ubyte*len(signalValue))(*signalValue)
        if type(signalValue) is str:
            signalValue=bytearray(signalValue)
            sigV = (ct.c_ubyte*len(signalValue))(*signalValue)
    sigV=ct.cast(sigV,ct.POINTER(ct.c_ubyte)) # IronPython needs this
    return c_WriteStringStream(clientID, signalName, sigV, len(signalValue), operationMode) 

def rtt_write(self, buffer_index, data):
        """Writes data to the RTT buffer.

        This method will write at most len(data) bytes to the specified RTT
        buffer.

        Args:
          self (JLink): the ``JLink`` instance
          buffer_index (int): the index of the RTT buffer to write to
          data (list): the list of bytes to write to the RTT buffer

        Returns:
          The number of bytes successfully written to the RTT buffer.

        Raises:
          JLinkRTTException: if the underlying JLINK_RTTERMINAL_Write call fails.
        """
        buf_size = len(data)
        buf = (ctypes.c_ubyte * buf_size)(*bytearray(data))
        bytes_written = self._dll.JLINK_RTTERMINAL_Write(buffer_index, buf, buf_size)

        if bytes_written < 0:
            raise errors.JLinkRTTException(bytes_written)

        return bytes_written 

def _generate_data(self, bytes, offset):
        # XXX TODO consider offset
        if self._bytes_per_sample == 1:
            samples = bytes
            value = 127
            max = 255
            min = 0
            data = (ctypes.c_ubyte * samples)()
        else:
            samples = bytes >> 1
            value = 0
            max = 32767
            min = -32768
            data = (ctypes.c_short * samples)()
        step = (max - min) * 2 * self.frequency / self.audio_format.sample_rate
        for i in range(samples):
            value += step
            if value > max:
                value = max - (value - max)
                step = -step
            if value < min:
                value = min - (value - min)
                step = -step
            data[i] = value
        return data 

def _generate_data(self, bytes, offset):
        if self._bytes_per_sample == 1:
            start = offset
            samples = bytes
            bias = 127
            amplitude = 127
            data = (ctypes.c_ubyte * samples)()
        else:
            start = offset >> 1
            samples = bytes >> 1
            bias = 0
            amplitude = 32767
            data = (ctypes.c_short * samples)()
        step = self.frequency * (math.pi * 2) / self.audio_format.sample_rate
        for i in range(samples):
            data[i] = int(math.sin(step * (i + start)) * amplitude + bias)
        return data 

def _generate_data(self, bytes, offset):
        # XXX TODO consider offset
        if self._bytes_per_sample == 1:
            samples = bytes
            value = 127
            max = 255
            min = 0
            data = (ctypes.c_ubyte * samples)()
        else:
            samples = bytes >> 1
            value = 0
            max = 32767
            min = -32768
            data = (ctypes.c_short * samples)()
        step = (max - min) * 2 * self.frequency / self.audio_format.sample_rate
        for i in range(samples):
            value += step
            if value > max:
                value = max - (value - max)
                step = -step
            if value < min:
                value = min - (value - min)
                step = -step
            data[i] = value
        return data 

def _generate_data(self, bytes, offset):
        # XXX TODO consider offset
        if self._bytes_per_sample == 1:
            samples = bytes
            value = 0
            amplitude = 255
            data = (ctypes.c_ubyte * samples)()
        else:
            samples = bytes >> 1
            value = -32768
            amplitude = 65535
            data = (ctypes.c_short * samples)()
        period = self.audio_format.sample_rate / self.frequency / 2
        count = 0
        for i in range(samples):
            count += 1
            if count == period:
                value = amplitude - value
                count = 0
            data[i] = value
        return data 

def _generate_data(self, bytes, offset):
        if self._bytes_per_sample == 1:
            start = offset
            samples = bytes
            bias = 127
            amplitude = 127
            data = (ctypes.c_ubyte * samples)()
        else:
            start = offset >> 1
            samples = bytes >> 1
            bias = 0
            amplitude = 32767
            data = (ctypes.c_short * samples)()
        step = self.frequency * (math.pi * 2) / self.audio_format.sample_rate
        for i in range(samples):
            data[i] = int(math.sin(step * (i + start)) * amplitude + bias)
        return data 

def decode_bitfields(bits, r_mask, g_mask, b_mask,
                     width, height, pitch, pitch_sign):
    r_shift1, r_shift2 = get_shift(r_mask)
    g_shift1, g_shift2 = get_shift(g_mask)
    b_shift1, b_shift2 = get_shift(b_mask)

    rgb_pitch = 3 * len(bits[0])
    buffer = (ctypes.c_ubyte * (height * rgb_pitch))()

    i = 0
    for row in bits:
        for packed in row:
            buffer[i] = (packed & r_mask) >> r_shift1 << r_shift2
            buffer[i+1] = (packed & g_mask) >> g_shift1 << g_shift2
            buffer[i+2] = (packed & b_mask) >> b_shift1 << b_shift2
            i += 3

    return ImageData(width, height, 'RGB', buffer, pitch_sign * rgb_pitch)