def test_tid(self):
descr, rest = VpxPayloadDescriptor.parse(b'\x90\x20\xe0')
self.assertEqual(descr.partition_start, 1)
self.assertEqual(descr.partition_id, 0)
self.assertEqual(descr.picture_id, None)
self.assertEqual(descr.tl0picidx, None)
self.assertEqual(descr.tid, (3, 1))
self.assertEqual(descr.keyidx, None)
self.assertEqual(bytes(descr), b'\x90\x20\xe0')
self.assertEqual(rest, b'')
def test_short_picture_id_127(self):
descr, rest = VpxPayloadDescriptor.parse(b"\x90\x80\x7f")
self.assertEqual(descr.partition_start, 1)
self.assertEqual(descr.partition_id, 0)
self.assertEqual(descr.picture_id, 127)
self.assertEqual(descr.tl0picidx, None)
self.assertEqual(descr.tid, None)
self.assertEqual(descr.keyidx, None)
self.assertEqual(bytes(descr), b"\x90\x80\x7f")
self.assertEqual(rest, b"")
def test_tl0picidx(self):
descr, rest = VpxPayloadDescriptor.parse(b'\x90\xc0\x92\x67\x81')
self.assertEqual(descr.partition_start, 1)
self.assertEqual(descr.partition_id, 0)
self.assertEqual(descr.picture_id, 4711)
self.assertEqual(descr.tl0picidx, 129)
self.assertEqual(descr.tid, None)
self.assertEqual(descr.keyidx, None)
self.assertEqual(bytes(descr), b'\x90\xc0\x92\x67\x81')
self.assertEqual(rest, b'')
def test_long_picture_id_128(self):
descr, rest = VpxPayloadDescriptor.parse(b'\x90\x80\x80\x80')
self.assertEqual(descr.partition_start, 1)
self.assertEqual(descr.partition_id, 0)
self.assertEqual(descr.picture_id, 128)
self.assertEqual(descr.tl0picidx, None)
self.assertEqual(descr.tid, None)
self.assertEqual(descr.keyidx, None)
self.assertEqual(bytes(descr), b'\x90\x80\x80\x80')
self.assertEqual(rest, b'')
def test_keyidx(self):
descr, rest = VpxPayloadDescriptor.parse(b"\x90\x10\x1f")
self.assertEqual(descr.partition_start, 1)
self.assertEqual(descr.partition_id, 0)
self.assertEqual(descr.picture_id, None)
self.assertEqual(descr.tl0picidx, None)
self.assertEqual(descr.tid, None)
self.assertEqual(descr.keyidx, 31)
self.assertEqual(bytes(descr), b"\x90\x10\x1f")
self.assertEqual(rest, b"")
def test_no_picture_id(self):
descr, rest = VpxPayloadDescriptor.parse(b'\x10')
self.assertEqual(descr.partition_start, 1)
self.assertEqual(descr.partition_id, 0)
self.assertEqual(descr.picture_id, None)
self.assertEqual(descr.tl0picidx, None)
self.assertEqual(descr.tid, None)
self.assertEqual(descr.keyidx, None)
self.assertEqual(bytes(descr), b'\x10')
self.assertEqual(repr(descr), 'VpxPayloadDescriptor(S=1, PID=0, pic_id=None)')
self.assertEqual(rest, b'')
def test_long_picture_id_4711(self):
"""
From RFC 7741 - 4.6.5
"""
descr, rest = VpxPayloadDescriptor.parse(b'\x90\x80\x92\x67')
self.assertEqual(descr.partition_start, 1)
self.assertEqual(descr.partition_id, 0)
self.assertEqual(descr.picture_id, 4711)
self.assertEqual(descr.tl0picidx, None)
self.assertEqual(descr.tid, None)
self.assertEqual(descr.keyidx, None)
self.assertEqual(bytes(descr), b'\x90\x80\x92\x67')
self.assertEqual(rest, b'')
def test_short_picture_id_17(self):
"""
From RFC 7741 - 4.6.3
"""
descr, rest = VpxPayloadDescriptor.parse(b'\x90\x80\x11')
self.assertEqual(descr.partition_start, 1)
self.assertEqual(descr.partition_id, 0)
self.assertEqual(descr.picture_id, 17)
self.assertEqual(descr.tl0picidx, None)
self.assertEqual(descr.tid, None)
self.assertEqual(descr.keyidx, None)
self.assertEqual(bytes(descr), b'\x90\x80\x11')
self.assertEqual(repr(descr), 'VpxPayloadDescriptor(S=1, PID=0, pic_id=17)')
self.assertEqual(rest, b'')
def test_truncated(self):
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b"")
self.assertEqual(str(cm.exception), "VPX descriptor is too short")
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b"\x80")
self.assertEqual(str(cm.exception),
"VPX descriptor has truncated extended bits")
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b"\x80\x80")
self.assertEqual(str(cm.exception),
"VPX descriptor has truncated PictureID")
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b"\x80\x80\x80")
self.assertEqual(str(cm.exception),
"VPX descriptor has truncated long PictureID")
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b"\x80\x40")
self.assertEqual(str(cm.exception),
"VPX descriptor has truncated TL0PICIDX")
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b"\x80\x20")
self.assertEqual(str(cm.exception), "VPX descriptor has truncated T/K")
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b"\x80\x10")
self.assertEqual(str(cm.exception), "VPX descriptor has truncated T/K")
def test_truncated(self):
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b'')
self.assertEqual(str(cm.exception), 'VPX descriptor is too short')
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b'\x80')
self.assertEqual(str(cm.exception),
'VPX descriptor has truncated extended bits')
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b'\x80\x80')
self.assertEqual(str(cm.exception),
'VPX descriptor has truncated PictureID')
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b'\x80\x80\x80')
self.assertEqual(str(cm.exception),
'VPX descriptor has truncated long PictureID')
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b'\x80\x40')
self.assertEqual(str(cm.exception),
'VPX descriptor has truncated TL0PICIDX')
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b'\x80\x20')
self.assertEqual(str(cm.exception), 'VPX descriptor has truncated T/K')
with self.assertRaises(ValueError) as cm:
VpxPayloadDescriptor.parse(b'\x80\x10')
self.assertEqual(str(cm.exception), 'VPX descriptor has truncated T/K')
