def test_packetiseDoc(self, data):
doc, encoding, bom, time, marker = data
thisTransmitter = TTMLTransmitter("", 0, encoding=encoding, bom=bom)
expectedSeqNum = thisTransmitter._nextSeqNum
packets = thisTransmitter._packetiseDoc(doc, time)
for x in range(len(packets)):
payload = RTPPayload_TTML(
encoding=encoding, bom=bom).fromBytearray(packets[x].payload)
self.assertEqual(packets[x].timestamp,
thisTransmitter._datetimeToRTPTs(time))
self.assertEqual(packets[x].sequenceNumber, expectedSeqNum + x)
self.assertIn(payload.userDataWords, doc)
self.assertLess(len(utfEncode(payload.userDataWords)), 2**16)
thisBom = BOMS[encoding]
if bom and (x == 0):
self.assertTrue(payload._userDataWords.startswith(thisBom))
else:
self.assertFalse(payload._userDataWords.startswith(thisBom))
if x == (len(packets) - 1):
self.assertTrue(packets[x].marker)
else:
self.assertFalse(packets[x].marker)
self.assertEqual(thisTransmitter.nextSeqNum,
expectedSeqNum + len(packets))
def test_userDataWords_encodings(self, data):
doc, encoding, bom = data
payload = RTPPayload_TTML(userDataWords=doc,
encoding=encoding,
bom=bom)
self.assertEqual(payload.userDataWords, doc)
self.assertEqual(payload._userDataWords, utfEncode(doc, encoding, bom))
def test_init(self, data):
doc, encoding, bom = data
reservedBits = bytearray(b'\x00\x00')
newP = RTPPayload_TTML(reservedBits, doc, encoding, bom)
self.assertEqual(newP.reserved, reservedBits)
self.assertEqual(newP.userDataWords, doc)
self.assertEqual(newP._encoding, encoding)
self.assertEqual(newP._bom, bom)
def test_fromBytearray(self, doc):
expected = RTPPayload_TTML(userDataWords=doc)
bDoc = utfEncode(doc)
bArray = bytearray(2)
bArray += int(len(bDoc)).to_bytes(2, byteorder='big')
bArray += bDoc
self.thisP.fromBytearray(bArray)
self.assertEqual(expected, self.thisP)
def test_generateRTPPacket(self, data):
doc, encoding, bom, time, isFirst, marker = data
thisTransmitter = TTMLTransmitter("", 0, encoding=encoding, bom=bom)
expectedSeqNum = thisTransmitter._nextSeqNum
packet = thisTransmitter._generateRTPPacket(doc, time, isFirst, marker)
payload = RTPPayload_TTML(encoding=encoding,
bom=bom).fromBytearray(packet.payload)
self.assertEqual(packet.timestamp, time)
self.assertEqual(packet.sequenceNumber, expectedSeqNum)
self.assertEqual(packet.marker, marker)
self.assertEqual(payload.userDataWords, doc)
self.assertEqual(thisTransmitter._nextSeqNum, expectedSeqNum + 1)
def _generateRTPPacket(self, doc: str, time: int, isFirst: bool,
marker: bool) -> RTP:
# Only include bom in first packet for doc
thisBOM = (isFirst and self._bom)
packet = RTP(timestamp=time,
sequenceNumber=self._nextSeqNum,
payload=RTPPayload_TTML(userDataWords=doc,
encoding=self._encoding,
bom=thisBOM).toBytearray(),
marker=marker,
payloadType=self._payloadType)
self._nextSeqNum += 1
return packet
def test_processData(self, data):
doc, encoding, bom = data
payload = RTPPayload_TTML(userDataWords=doc,
encoding=encoding,
bom=bom).toBytearray()
packet = RTP(payload=payload, marker=True)
packetBytes = packet.toBytes()
with mock.patch("rtpTTML.ttmlReceiver.RTPPayload_TTML") as mockTTML:
thisReceiver = TTMLReceiver(0,
self.callback,
encoding=encoding,
bom=bom)
thisReceiver._processData(packetBytes)
mockTTML.assert_called_once_with(encoding=encoding, bom=bom)
def _processPacket(self, packet: RTP) -> None:
# New TS means a new document
if self._curTimestamp != packet.timestamp:
# If we haven't processed by now, document is incomplete
# so we discard it
self._fragments.clear()
# Assume this packet is the first in doc. If we're wrong, the doc
# won't be valid TTML when decoded anyway
self._curTimestamp = packet.timestamp
seqNumber = packet.sequenceNumber
if len(self._fragments) > 0:
seqNumber = self._unloopSeqNum(
max(self._fragments), packet.sequenceNumber)
payload = RTPPayload_TTML(
encoding=self._encoding, bom=self._bom)
payload.fromBytearray(packet.payload)
self._fragments[seqNumber] = payload.userDataWords
def test_bytearray_default(self):
expected = bytearray(4)
self.assertEqual(bytes(self.thisP), expected)
newP = RTPPayload_TTML().fromBytearray(expected)
self.assertEqual(newP, self.thisP)
def test_eq(self):
reservedBits = bytearray(b'\x00\x00')
newP = RTPPayload_TTML(reservedBits, "")
self.assertEqual(newP, self.thisP)
def test_init_invalidEnc(self, doc, enc, bom):
reservedBits = bytearray(b'\x00\x00')
with self.assertRaises(AttributeError):
RTPPayload_TTML(reservedBits, doc, enc, bom)
def setUp(self):
self.thisP = RTPPayload_TTML()
def test_fromBytearray_invalidLen(self, length):
bArray = bytearray(4)
bArray[2:4] = length
with self.assertRaises(LengthError):
RTPPayload_TTML().fromBytearray(bArray)