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from unittest import TestCase
from aiortc.jitterbuffer import JitterBuffer
from aiortc.rtp import RtpPacket
class JitterBufferTest(TestCase):
def assertPackets(self, jbuffer, expected):
found = [x.sequence_number if x else None for x in jbuffer._packets]
self.assertEqual(found, expected)
def test_create(self):
jbuffer = JitterBuffer(capacity=2)
self.assertEqual(jbuffer._packets, [None, None])
self.assertEqual(jbuffer._origin, None)
jbuffer = JitterBuffer(capacity=4)
self.assertEqual(jbuffer._packets, [None, None, None, None])
self.assertEqual(jbuffer._origin, None)
def test_add_ordered(self):
jbuffer = JitterBuffer(capacity=4)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=0, timestamp=1234))
self.assertIsNone(frame)
self.assertPackets(jbuffer, [0, None, None, None])
self.assertEqual(jbuffer._origin, 0)
self.assertFalse(pli_flag)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=1, timestamp=1234))
self.assertIsNone(frame)
self.assertPackets(jbuffer, [0, 1, None, None])
self.assertEqual(jbuffer._origin, 0)
self.assertFalse(pli_flag)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=2, timestamp=1234))
self.assertIsNone(frame)
self.assertPackets(jbuffer, [0, 1, 2, None])
self.assertEqual(jbuffer._origin, 0)
self.assertFalse(pli_flag)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=3, timestamp=1234))
self.assertIsNone(frame)
self.assertPackets(jbuffer, [0, 1, 2, 3])
self.assertEqual(jbuffer._origin, 0)
self.assertFalse(pli_flag)
def test_add_unordered(self):
jbuffer = JitterBuffer(capacity=4)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=1, timestamp=1234))
self.assertIsNone(frame)
self.assertPackets(jbuffer, [None, 1, None, None])
self.assertEqual(jbuffer._origin, 1)
self.assertFalse(pli_flag)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=3, timestamp=1234))
self.assertIsNone(frame)
self.assertPackets(jbuffer, [None, 1, None, 3])
self.assertEqual(jbuffer._origin, 1)
self.assertFalse(pli_flag)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=2, timestamp=1234))
self.assertIsNone(frame)
self.assertPackets(jbuffer, [None, 1, 2, 3])
self.assertEqual(jbuffer._origin, 1)
self.assertFalse(pli_flag)
def test_add_seq_too_low_drop(self):
jbuffer = JitterBuffer(capacity=4)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=2, timestamp=1234))
self.assertIsNone(frame)
self.assertPackets(jbuffer, [None, None, 2, None])
self.assertEqual(jbuffer._origin, 2)
self.assertFalse(pli_flag)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=1, timestamp=1234))
self.assertIsNone(frame)
self.assertPackets(jbuffer, [None, None, 2, None])
self.assertEqual(jbuffer._origin, 2)
self.assertFalse(pli_flag)
def test_add_seq_too_low_reset(self):
jbuffer = JitterBuffer(capacity=4)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=2000, timestamp=1234))
self.assertIsNone(frame)
self.assertPackets(jbuffer, [2000, None, None, None])
self.assertEqual(jbuffer._origin, 2000)
self.assertFalse(pli_flag)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=1, timestamp=1234))
self.assertIsNone(frame)
self.assertPackets(jbuffer, [None, 1, None, None])
self.assertEqual(jbuffer._origin, 1)
self.assertFalse(pli_flag)
def test_add_seq_too_high_discard_one(self):
jbuffer = JitterBuffer(capacity=4)
jbuffer.add(RtpPacket(sequence_number=0, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=1, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=2, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=3, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=4, timestamp=1234))
self.assertEqual(jbuffer._origin, 4)
self.assertPackets(jbuffer, [4, None, None, None])
def test_add_seq_too_high_discard_one_v2(self):
jbuffer = JitterBuffer(capacity=4)
jbuffer.add(RtpPacket(sequence_number=0, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=2, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=3, timestamp=1235))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=4, timestamp=1235))
self.assertEqual(jbuffer._origin, 3)
self.assertPackets(jbuffer, [4, None, None, 3])
def test_add_seq_too_high_discard_four(self):
jbuffer = JitterBuffer(capacity=4)
jbuffer.add(RtpPacket(sequence_number=0, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=1, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=3, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=7, timestamp=1235))
self.assertEqual(jbuffer._origin, 7)
self.assertPackets(jbuffer, [None, None, None, 7])
def test_add_seq_too_high_discard_more(self):
jbuffer = JitterBuffer(capacity=4)
jbuffer.add(RtpPacket(sequence_number=0, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=1, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=2, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=3, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
jbuffer.add(RtpPacket(sequence_number=8, timestamp=1234))
self.assertEqual(jbuffer._origin, 8)
self.assertPackets(jbuffer, [8, None, None, None])
def test_add_seq_too_high_reset(self):
jbuffer = JitterBuffer(capacity=4)
jbuffer.add(RtpPacket(sequence_number=0, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
self.assertPackets(jbuffer, [0, None, None, None])
jbuffer.add(RtpPacket(sequence_number=3000, timestamp=1234))
self.assertEqual(jbuffer._origin, 3000)
self.assertPackets(jbuffer, [3000, None, None, None])
def test_remove(self):
jbuffer = JitterBuffer(capacity=4)
jbuffer.add(RtpPacket(sequence_number=0, timestamp=1234))
jbuffer.add(RtpPacket(sequence_number=1, timestamp=1234))
jbuffer.add(RtpPacket(sequence_number=2, timestamp=1234))
jbuffer.add(RtpPacket(sequence_number=3, timestamp=1234))
self.assertEqual(jbuffer._origin, 0)
self.assertPackets(jbuffer, [0, 1, 2, 3])
# remove 1 packet
jbuffer.remove(1)
self.assertEqual(jbuffer._origin, 1)
self.assertPackets(jbuffer, [None, 1, 2, 3])
# remove 2 packets
jbuffer.remove(2)
self.assertEqual(jbuffer._origin, 3)
self.assertPackets(jbuffer, [None, None, None, 3])
def test_smart_remove(self):
jbuffer = JitterBuffer(capacity=4)
jbuffer.add(RtpPacket(sequence_number=0, timestamp=1234))
jbuffer.add(RtpPacket(sequence_number=1, timestamp=1234))
jbuffer.add(RtpPacket(sequence_number=3, timestamp=1235))
self.assertEqual(jbuffer._origin, 0)
self.assertPackets(jbuffer, [0, 1, None, 3])
# remove 1 packet
jbuffer.smart_remove(1)
self.assertEqual(jbuffer._origin, 3)
self.assertPackets(jbuffer, [None, None, None, 3])
def test_remove_audio_frame(self):
"""
Audio jitter buffer.
"""
jbuffer = JitterBuffer(capacity=16, prefetch=4)
packet = RtpPacket(sequence_number=0, timestamp=1234)
packet._data = b"0000"
pli_flag, frame = jbuffer.add(packet)
self.assertIsNone(frame)
packet = RtpPacket(sequence_number=1, timestamp=1235)
packet._data = b"0001"
pli_flag, frame = jbuffer.add(packet)
self.assertIsNone(frame)
packet = RtpPacket(sequence_number=2, timestamp=1236)
packet._data = b"0002"
pli_flag, frame = jbuffer.add(packet)
self.assertIsNone(frame)
packet = RtpPacket(sequence_number=3, timestamp=1237)
packet._data = b"0003"
pli_flag, frame = jbuffer.add(packet)
self.assertIsNone(frame)
packet = RtpPacket(sequence_number=4, timestamp=1238)
packet._data = b"0003"
pli_flag, frame = jbuffer.add(packet)
self.assertIsNotNone(frame)
self.assertEqual(frame.data, b"0000")
self.assertEqual(frame.timestamp, 1234)
packet = RtpPacket(sequence_number=5, timestamp=1239)
packet._data = b"0004"
pli_flag, frame = jbuffer.add(packet)
self.assertIsNotNone(frame)
self.assertEqual(frame.data, b"0001")
self.assertEqual(frame.timestamp, 1235)
def test_remove_video_frame(self):
"""
Video jitter buffer.
"""
jbuffer = JitterBuffer(capacity=128, is_video=True)
packet = RtpPacket(sequence_number=0, timestamp=1234)
packet._data = b"0000"
pli_flag, frame = jbuffer.add(packet)
self.assertIsNone(frame)
packet = RtpPacket(sequence_number=1, timestamp=1234)
packet._data = b"0001"
pli_flag, frame = jbuffer.add(packet)
self.assertIsNone(frame)
packet = RtpPacket(sequence_number=2, timestamp=1234)
packet._data = b"0002"
pli_flag, frame = jbuffer.add(packet)
self.assertIsNone(frame)
packet = RtpPacket(sequence_number=3, timestamp=1235)
packet._data = b"0003"
pli_flag, frame = jbuffer.add(packet)
self.assertIsNotNone(frame)
self.assertEqual(frame.data, b"000000010002")
self.assertEqual(frame.timestamp, 1234)
def test_pli_flag(self):
"""
Video jitter buffer.
"""
jbuffer = JitterBuffer(capacity=128, is_video=True)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=2000, timestamp=1234))
self.assertIsNone(frame)
self.assertEqual(jbuffer._origin, 2000)
self.assertFalse(pli_flag)
# test_add_seq_too_low_reset for video (capacity >= 128)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=1, timestamp=1234))
self.assertIsNone(frame)
self.assertEqual(jbuffer._origin, 1)
self.assertTrue(pli_flag)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=128, timestamp=1235))
self.assertIsNone(frame)
self.assertEqual(jbuffer._origin, 1)
self.assertFalse(pli_flag)
# test_add_seq_too_high_discard_one for video (capacity >= 128)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=129, timestamp=1235))
self.assertIsNone(frame)
self.assertEqual(jbuffer._origin, 128)
self.assertTrue(pli_flag)
# test_add_seq_too_high_reset for video (capacity >= 128)
pli_flag, frame = jbuffer.add(RtpPacket(sequence_number=2000, timestamp=2345))
self.assertIsNone(frame)
self.assertEqual(jbuffer._origin, 2000)
self.assertTrue(pli_flag)
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