def has_data(self):
"""
:returns: True if there is data waiting on *socket*.
"""
# read a word
try:
tmpstr = socketread(self.socket, 4, socket.MSG_DONTWAIT | socket.MSG_PEEK)
except socket.error:
self.eof = True
return False
return True
def has_data(self):
"""
:returns: True if there is data waiting on *socket*.
"""
# read a word
try:
tmpstr = socketread(self.socket, 4,
socket.MSG_DONTWAIT | socket.MSG_PEEK)
except socket.error:
self.eof = True
return False
return True
def __init__(self, word, socket):
self.ptype = 1
self.count = (word >> 16) & 0x0f
self.size = (word >> 0) & 0xffff
# read in the rest of the header
tmpstr = socketread(socket, 16)
if len(tmpstr) < 16:
raise InvalidDataReceived("data packet too short: %r" % tmpstr)
(self.streamId, self.tsi, self.tsf) = struct.unpack(">IIQ", tmpstr)
# read in the payload
payloadsize = self.size - 5 - 1
tmpstr = socketread(socket, payloadsize * 4)
if (len(tmpstr) < (payloadsize * 4)):
raise InvalidDataReceived("data packet too short: %r" % tmpstr)
# interpret data
self.data = IQData(tmpstr)
# read in the trailer
tmpstr = socketread(socket, 4)
if (len(tmpstr) < 4):
raise InvalidDataReceived("data packet too short: %r" % tmpstr)
def __init__(self, word, socket):
self.ptype = 1
self.count = (word >> 16) & 0x0f
self.size = (word >> 0) & 0xffff
# read in the rest of the header
tmpstr = socketread(socket, 16)
if len(tmpstr) < 16:
raise InvalidDataReceived("data packet too short: %r" % tmpstr)
(self.streamId, self.tsi, self.tsf) = struct.unpack(">IIQ", tmpstr)
# read in the payload
payloadsize = self.size - 5 - 1
tmpstr = socketread(socket, payloadsize * 4)
if (len(tmpstr) < (payloadsize * 4)):
raise InvalidDataReceived("data packet too short: %r" % tmpstr)
# interpret data
self.data = IQData(tmpstr)
# read in the trailer
tmpstr = socketread(socket, 4)
if (len(tmpstr) < 4):
raise InvalidDataReceived("data packet too short: %r" % tmpstr)
def __init__(self, pkt_type, word, socket):
# extract the pieces of word we want
self.ptype = pkt_type
self.count = (word >> 16) & 0x0f
self.size = (word >> 0) & 0xffff
self.fields = {}
# now read in the rest of the packet
packet_size = (self.size - 1) * 4
tmpstr = socketread(socket, packet_size)
(self.streamId, self.tsi, self.tsf,indicatorsField,) = struct.unpack(">IIQI", tmpstr[0:20])
# now read all the indicators
if self.streamId == VRTRECEIVER:
self._parseReceiverContext(indicatorsField, tmpstr[20:])
elif self.streamId == VRTDIGITIZER:
self._parseDigitizerContext(indicatorsField, tmpstr[20:])
elif self.streamId == VRTCUSTOM:
self._parseCustomContext(indicatorsField, tmpstr[20:])
def read_packet(self):
"""
Read a complete packet from *socket* and return either a
:class:`pyrf.vrt.ContextPacket` or a
:class:`pyrf.vrt.DataPacket`.
"""
# read a word
tmpstr = socketread(self.socket, 4, 0)
# convert to int word
(word, ) = struct.unpack(">I", tmpstr)
# decode the packet type
packet_type = (word >> 28) & 0x0f
if packet_type in (VRTCONTEXT, VRTCUSTOMCONTEXT):
return ContextPacket(packet_type, word, self.socket)
elif packet_type == VRTDATA:
return DataPacket(word, self.socket)
else:
raise InvalidDataReceived("unknown packet type: %s" % packet_type)
def read_packet(self):
"""
Read a complete packet from *socket* and return either a
:class:`pyrf.vrt.ContextPacket` or a
:class:`pyrf.vrt.DataPacket`.
"""
# read a word
tmpstr = socketread(self.socket, 4, 0)
# convert to int word
(word,) = struct.unpack(">I", tmpstr)
# decode the packet type
packet_type = (word >> 28) & 0x0f
if packet_type in (VRTCONTEXT, VRTCUSTOMCONTEXT):
return ContextPacket(packet_type, word, self.socket)
elif packet_type == VRTDATA:
return DataPacket(word, self.socket)
else:
raise InvalidDataReceived("unknown packet type: %s" % packet_type)
def __init__(self, pkt_type, word, socket):
# extract the pieces of word we want
self.ptype = pkt_type
self.count = (word >> 16) & 0x0f
self.size = (word >> 0) & 0xffff
self.fields = {}
# now read in the rest of the packet
packet_size = (self.size - 1) * 4
tmpstr = socketread(socket, packet_size)
(
self.streamId,
self.tsi,
self.tsf,
indicatorsField,
) = struct.unpack(">IIQI", tmpstr[0:20])
# now read all the indicators
if self.streamId == VRTRECEIVER:
self._parseReceiverContext(indicatorsField, tmpstr[20:])
elif self.streamId == VRTDIGITIZER:
self._parseDigitizerContext(indicatorsField, tmpstr[20:])
elif self.streamId == VRTCUSTOM:
self._parseCustomContext(indicatorsField, tmpstr[20:])
def raw_read(self, num):
return socketread(self._sock_vrt, num)
