Commit | Line | Data |
---|---|---|
0235b0db | 1 | # SPDX-License-Identifier: MIT |
81447b5b PP |
2 | # |
3 | # Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com> | |
81447b5b PP |
4 | |
5 | from bt2 import native_bt, object, utils | |
3fb99a22 | 6 | from bt2 import message as bt2_message |
81447b5b | 7 | import collections.abc |
3fb99a22 PP |
8 | from bt2 import stream as bt2_stream |
9 | from bt2 import event_class as bt2_event_class | |
10 | from bt2 import packet as bt2_packet | |
11 | from bt2 import port as bt2_port | |
12 | from bt2 import clock_class as bt2_clock_class | |
81447b5b PP |
13 | import bt2 |
14 | ||
15 | ||
5602ef81 | 16 | class _MessageIterator(collections.abc.Iterator): |
81447b5b | 17 | def __next__(self): |
811644b8 | 18 | raise NotImplementedError |
81447b5b PP |
19 | |
20 | ||
1975af3d | 21 | class _UserComponentInputPortMessageIterator(object._SharedObject, _MessageIterator): |
9a2c8b8e PP |
22 | _get_ref = staticmethod(native_bt.message_iterator_get_ref) |
23 | _put_ref = staticmethod(native_bt.message_iterator_put_ref) | |
1975af3d | 24 | |
2ae9f48c | 25 | def __init__(self, ptr): |
cfbd7cf3 FD |
26 | self._current_msgs = [] |
27 | self._at = 0 | |
28 | super().__init__(ptr) | |
811644b8 PP |
29 | |
30 | def __next__(self): | |
2ae9f48c | 31 | if len(self._current_msgs) == self._at: |
1975af3d SM |
32 | status, msgs = native_bt.bt2_self_component_port_input_get_msg_range( |
33 | self._ptr | |
34 | ) | |
cfbd7cf3 | 35 | utils._handle_func_status( |
f5567ea8 | 36 | status, "unexpected error: cannot advance the message iterator" |
cfbd7cf3 | 37 | ) |
2ae9f48c SM |
38 | self._current_msgs = msgs |
39 | self._at = 0 | |
40 | ||
41 | msg_ptr = self._current_msgs[self._at] | |
42 | self._at += 1 | |
43 | ||
3fb99a22 | 44 | return bt2_message._create_from_ptr(msg_ptr) |
81447b5b | 45 | |
f00b8d40 | 46 | def can_seek_beginning(self): |
9a2c8b8e | 47 | (status, res) = native_bt.message_iterator_can_seek_beginning(self._ptr) |
f2fb1b32 SM |
48 | utils._handle_func_status( |
49 | status, | |
f5567ea8 | 50 | "cannot check whether or not message iterator can seek its beginning", |
f2fb1b32 | 51 | ) |
f00b8d40 SM |
52 | return res != 0 |
53 | ||
54 | def seek_beginning(self): | |
b6909b73 | 55 | # Forget about buffered messages, they won't be valid after seeking. |
f00b8d40 SM |
56 | self._current_msgs.clear() |
57 | self._at = 0 | |
58 | ||
9a2c8b8e | 59 | status = native_bt.message_iterator_seek_beginning(self._ptr) |
f5567ea8 | 60 | utils._handle_func_status(status, "cannot seek message iterator beginning") |
f00b8d40 | 61 | |
c182d7dd SM |
62 | def can_seek_ns_from_origin(self, ns_from_origin): |
63 | utils._check_int64(ns_from_origin) | |
9a2c8b8e | 64 | (status, res) = native_bt.message_iterator_can_seek_ns_from_origin( |
c182d7dd SM |
65 | self._ptr, ns_from_origin |
66 | ) | |
67 | utils._handle_func_status( | |
68 | status, | |
f5567ea8 | 69 | "cannot check whether or not message iterator can seek given ns from origin", |
c182d7dd SM |
70 | ) |
71 | return res != 0 | |
72 | ||
73 | def seek_ns_from_origin(self, ns_from_origin): | |
74 | utils._check_int64(ns_from_origin) | |
75 | ||
76 | # Forget about buffered messages, they won't be valid after seeking. | |
77 | self._current_msgs.clear() | |
78 | self._at = 0 | |
79 | ||
9a2c8b8e | 80 | status = native_bt.message_iterator_seek_ns_from_origin( |
c182d7dd SM |
81 | self._ptr, ns_from_origin |
82 | ) | |
83 | utils._handle_func_status( | |
f5567ea8 | 84 | status, "message iterator cannot seek given ns from origin" |
c182d7dd SM |
85 | ) |
86 | ||
8d8b141d SM |
87 | @property |
88 | def can_seek_forward(self): | |
9a2c8b8e | 89 | return native_bt.message_iterator_can_seek_forward(self._ptr) |
8d8b141d SM |
90 | |
91 | ||
92 | class _MessageIteratorConfiguration: | |
93 | def __init__(self, ptr): | |
94 | self._ptr = ptr | |
95 | ||
96 | def can_seek_forward(self, value): | |
97 | utils._check_bool(value) | |
98 | native_bt.self_message_iterator_configuration_set_can_seek_forward( | |
99 | self._ptr, value | |
100 | ) | |
101 | ||
102 | can_seek_forward = property(fset=can_seek_forward) | |
103 | ||
811644b8 | 104 | |
c5f330cd SM |
105 | # This is extended by the user to implement component classes in Python. It |
106 | # is created for a given output port when an input port message iterator is | |
7a2d4e2d | 107 | # created on the input port on the other side of the connection. |
c5f330cd SM |
108 | # |
109 | # Its purpose is to feed the messages that should go out through this output | |
110 | # port. | |
5602ef81 | 111 | class _UserMessageIterator(_MessageIterator): |
81447b5b | 112 | def __new__(cls, ptr): |
811644b8 | 113 | # User iterator objects are always created by the native side, |
81447b5b PP |
114 | # that is, never instantiated directly by Python code. |
115 | # | |
811644b8 PP |
116 | # The native code calls this, then manually calls |
117 | # self.__init__() without the `ptr` argument. The user has | |
118 | # access to self.component during this call, thanks to this | |
85906b6b | 119 | # self._bt_ptr argument being set. |
81447b5b | 120 | # |
85906b6b | 121 | # self._bt_ptr is NOT owned by this object here, so there's nothing |
81447b5b PP |
122 | # to do in __del__(). |
123 | self = super().__new__(cls) | |
85906b6b | 124 | self._bt_ptr = ptr |
81447b5b PP |
125 | return self |
126 | ||
8d8b141d | 127 | def _bt_init_from_native(self, config_ptr, self_output_port_ptr): |
3fb99a22 | 128 | self_output_port = bt2_port._create_self_from_ptr_and_get_ref( |
cfbd7cf3 FD |
129 | self_output_port_ptr, native_bt.PORT_TYPE_OUTPUT |
130 | ) | |
8d8b141d SM |
131 | config = _MessageIteratorConfiguration(config_ptr) |
132 | self.__init__(config, self_output_port) | |
c5f330cd | 133 | |
8d8b141d | 134 | def __init__(self, config, self_output_port): |
81447b5b PP |
135 | pass |
136 | ||
137 | @property | |
811644b8 | 138 | def _component(self): |
85906b6b | 139 | return native_bt.bt2_get_user_component_from_user_msg_iter(self._bt_ptr) |
81447b5b | 140 | |
14503fb1 SM |
141 | @property |
142 | def _port(self): | |
143 | port_ptr = native_bt.self_message_iterator_borrow_port(self._bt_ptr) | |
144 | assert port_ptr is not None | |
145 | return bt2_port._create_self_from_ptr_and_get_ref( | |
146 | port_ptr, native_bt.PORT_TYPE_OUTPUT | |
147 | ) | |
148 | ||
81447b5b PP |
149 | @property |
150 | def addr(self): | |
85906b6b | 151 | return int(self._bt_ptr) |
81447b5b | 152 | |
9b4f9b42 PP |
153 | @property |
154 | def _is_interrupted(self): | |
155 | return bool(native_bt.self_message_iterator_is_interrupted(self._bt_ptr)) | |
156 | ||
6a91742b | 157 | def _user_finalize(self): |
81447b5b PP |
158 | pass |
159 | ||
811644b8 PP |
160 | def __next__(self): |
161 | raise bt2.Stop | |
162 | ||
85906b6b | 163 | def _bt_next_from_native(self): |
811644b8 PP |
164 | # this can raise anything: it's catched by the native part |
165 | try: | |
5602ef81 | 166 | msg = next(self) |
811644b8 PP |
167 | except StopIteration: |
168 | raise bt2.Stop | |
4c4935bf | 169 | except Exception: |
811644b8 PP |
170 | raise |
171 | ||
f0a42b33 | 172 | utils._check_type(msg, bt2_message._MessageConst) |
81447b5b | 173 | |
d79a8353 SM |
174 | # The reference we return will be given to the message array. |
175 | # However, the `msg` Python object may stay alive, if the user has kept | |
176 | # a reference to it. Acquire a new reference to account for that. | |
177 | msg._get_ref(msg._ptr) | |
178 | return int(msg._ptr) | |
2ae9f48c | 179 | |
85906b6b | 180 | def _bt_can_seek_beginning_from_native(self): |
f00b8d40 SM |
181 | # Here, we mimic the behavior of the C API: |
182 | # | |
14cfc8ce | 183 | # - If the iterator has a _user_can_seek_beginning method, |
6a91742b | 184 | # read it and use that result. |
5a096c63 | 185 | # - Otherwise, the presence or absence of a `_user_seek_beginning` |
f00b8d40 | 186 | # method indicates whether the iterator can seek beginning. |
f5567ea8 | 187 | if hasattr(self, "_user_can_seek_beginning"): |
14cfc8ce | 188 | can_seek_beginning = self._user_can_seek_beginning() |
f00b8d40 SM |
189 | utils._check_bool(can_seek_beginning) |
190 | return can_seek_beginning | |
191 | else: | |
f5567ea8 | 192 | return hasattr(self, "_user_seek_beginning") |
f00b8d40 | 193 | |
85906b6b | 194 | def _bt_seek_beginning_from_native(self): |
6a91742b | 195 | self._user_seek_beginning() |
f00b8d40 | 196 | |
c182d7dd | 197 | def _bt_can_seek_ns_from_origin_from_native(self, ns_from_origin): |
c0e46a7c SM |
198 | # Return whether the iterator can seek ns from origin using the |
199 | # user-implemented seek_ns_from_origin method. We mimic the behavior | |
200 | # of the C API: | |
c182d7dd SM |
201 | # |
202 | # - If the iterator has a _user_can_seek_ns_from_origin method, | |
203 | # call it and use its return value. | |
204 | # - Otherwise, if there is a `_user_seek_ns_from_origin` method, | |
205 | # we presume it's possible. | |
c0e46a7c | 206 | |
f5567ea8 | 207 | if hasattr(self, "_user_can_seek_ns_from_origin"): |
c182d7dd SM |
208 | can_seek_ns_from_origin = self._user_can_seek_ns_from_origin(ns_from_origin) |
209 | utils._check_bool(can_seek_ns_from_origin) | |
210 | return can_seek_ns_from_origin | |
c182d7dd | 211 | else: |
f5567ea8 | 212 | return hasattr(self, "_user_seek_ns_from_origin") |
c182d7dd SM |
213 | |
214 | def _bt_seek_ns_from_origin_from_native(self, ns_from_origin): | |
215 | self._user_seek_ns_from_origin(ns_from_origin) | |
216 | ||
9a2c8b8e | 217 | def _create_message_iterator(self, input_port): |
3fb99a22 | 218 | utils._check_type(input_port, bt2_port._UserComponentInputPort) |
ca02df0a | 219 | |
415d43a1 | 220 | if not input_port.is_connected: |
f5567ea8 | 221 | raise ValueError("input port is not connected") |
415d43a1 | 222 | |
75882e97 FD |
223 | ( |
224 | status, | |
225 | msg_iter_ptr, | |
9a2c8b8e | 226 | ) = native_bt.bt2_message_iterator_create_from_message_iterator( |
ca02df0a PP |
227 | self._bt_ptr, input_port._ptr |
228 | ) | |
f5567ea8 | 229 | utils._handle_func_status(status, "cannot create message iterator object") |
e803df70 | 230 | assert msg_iter_ptr is not None |
ca02df0a PP |
231 | |
232 | return _UserComponentInputPortMessageIterator(msg_iter_ptr) | |
233 | ||
36d9460d | 234 | def _create_event_message(self, event_class, parent, default_clock_snapshot=None): |
3fb99a22 | 235 | utils._check_type(event_class, bt2_event_class._EventClass) |
26fc5aed PP |
236 | |
237 | if event_class.stream_class.supports_packets: | |
3fb99a22 | 238 | utils._check_type(parent, bt2_packet._Packet) |
26fc5aed | 239 | else: |
3fb99a22 | 240 | utils._check_type(parent, bt2_stream._Stream) |
2ae9f48c SM |
241 | |
242 | if default_clock_snapshot is not None: | |
c6af194f | 243 | if event_class.stream_class.default_clock_class is None: |
cfbd7cf3 | 244 | raise ValueError( |
f5567ea8 | 245 | "event messages in this stream must not have a default clock snapshot" |
cfbd7cf3 | 246 | ) |
c6af194f | 247 | |
2ae9f48c | 248 | utils._check_uint64(default_clock_snapshot) |
26fc5aed PP |
249 | |
250 | if event_class.stream_class.supports_packets: | |
251 | ptr = native_bt.message_event_create_with_packet_and_default_clock_snapshot( | |
cfbd7cf3 FD |
252 | self._bt_ptr, event_class._ptr, parent._ptr, default_clock_snapshot |
253 | ) | |
26fc5aed PP |
254 | else: |
255 | ptr = native_bt.message_event_create_with_default_clock_snapshot( | |
cfbd7cf3 FD |
256 | self._bt_ptr, event_class._ptr, parent._ptr, default_clock_snapshot |
257 | ) | |
2ae9f48c | 258 | else: |
c6af194f | 259 | if event_class.stream_class.default_clock_class is not None: |
cfbd7cf3 | 260 | raise ValueError( |
f5567ea8 | 261 | "event messages in this stream must have a default clock snapshot" |
cfbd7cf3 | 262 | ) |
c6af194f | 263 | |
26fc5aed PP |
264 | if event_class.stream_class.supports_packets: |
265 | ptr = native_bt.message_event_create_with_packet( | |
cfbd7cf3 FD |
266 | self._bt_ptr, event_class._ptr, parent._ptr |
267 | ) | |
26fc5aed PP |
268 | else: |
269 | ptr = native_bt.message_event_create( | |
cfbd7cf3 FD |
270 | self._bt_ptr, event_class._ptr, parent._ptr |
271 | ) | |
2ae9f48c SM |
272 | |
273 | if ptr is None: | |
f5567ea8 | 274 | raise bt2._MemoryError("cannot create event message object") |
2ae9f48c | 275 | |
3fb99a22 | 276 | return bt2_message._EventMessage(ptr) |
2ae9f48c | 277 | |
9ec609ec | 278 | def _create_message_iterator_inactivity_message(self, clock_class, clock_snapshot): |
3fb99a22 | 279 | utils._check_type(clock_class, bt2_clock_class._ClockClass) |
9ec609ec | 280 | ptr = native_bt.message_message_iterator_inactivity_create( |
cfbd7cf3 FD |
281 | self._bt_ptr, clock_class._ptr, clock_snapshot |
282 | ) | |
9ec609ec SM |
283 | |
284 | if ptr is None: | |
f5567ea8 | 285 | raise bt2._MemoryError("cannot create inactivity message object") |
9ec609ec | 286 | |
3fb99a22 | 287 | return bt2_message._MessageIteratorInactivityMessage(ptr) |
9ec609ec | 288 | |
188edac1 | 289 | def _create_stream_beginning_message(self, stream, default_clock_snapshot=None): |
3fb99a22 | 290 | utils._check_type(stream, bt2_stream._Stream) |
2ae9f48c | 291 | |
85906b6b | 292 | ptr = native_bt.message_stream_beginning_create(self._bt_ptr, stream._ptr) |
2ae9f48c | 293 | if ptr is None: |
f5567ea8 | 294 | raise bt2._MemoryError("cannot create stream beginning message object") |
2ae9f48c | 295 | |
3fb99a22 | 296 | msg = bt2_message._StreamBeginningMessage(ptr) |
9ec609ec | 297 | |
188edac1 SM |
298 | if default_clock_snapshot is not None: |
299 | msg._default_clock_snapshot = default_clock_snapshot | |
9ec609ec | 300 | |
9ec609ec SM |
301 | return msg |
302 | ||
188edac1 | 303 | def _create_stream_end_message(self, stream, default_clock_snapshot=None): |
3fb99a22 | 304 | utils._check_type(stream, bt2_stream._Stream) |
5f25509b | 305 | |
85906b6b | 306 | ptr = native_bt.message_stream_end_create(self._bt_ptr, stream._ptr) |
5f25509b | 307 | if ptr is None: |
f5567ea8 | 308 | raise bt2._MemoryError("cannot create stream end message object") |
5f25509b | 309 | |
3fb99a22 | 310 | msg = bt2_message._StreamEndMessage(ptr) |
188edac1 SM |
311 | |
312 | if default_clock_snapshot is not None: | |
313 | msg._default_clock_snapshot = default_clock_snapshot | |
314 | ||
315 | return msg | |
5f25509b | 316 | |
2ae9f48c | 317 | def _create_packet_beginning_message(self, packet, default_clock_snapshot=None): |
3fb99a22 | 318 | utils._check_type(packet, bt2_packet._Packet) |
2ae9f48c | 319 | |
e8ac1aae | 320 | if packet.stream.cls.packets_have_beginning_default_clock_snapshot: |
2ae9f48c | 321 | if default_clock_snapshot is None: |
cfbd7cf3 FD |
322 | raise ValueError( |
323 | "packet beginning messages in this stream must have a default clock snapshot" | |
324 | ) | |
2ae9f48c SM |
325 | |
326 | utils._check_uint64(default_clock_snapshot) | |
327 | ptr = native_bt.message_packet_beginning_create_with_default_clock_snapshot( | |
cfbd7cf3 FD |
328 | self._bt_ptr, packet._ptr, default_clock_snapshot |
329 | ) | |
2ae9f48c SM |
330 | else: |
331 | if default_clock_snapshot is not None: | |
cfbd7cf3 FD |
332 | raise ValueError( |
333 | "packet beginning messages in this stream must not have a default clock snapshot" | |
334 | ) | |
2ae9f48c | 335 | |
85906b6b | 336 | ptr = native_bt.message_packet_beginning_create(self._bt_ptr, packet._ptr) |
2ae9f48c SM |
337 | |
338 | if ptr is None: | |
f5567ea8 | 339 | raise bt2._MemoryError("cannot create packet beginning message object") |
2ae9f48c | 340 | |
3fb99a22 | 341 | return bt2_message._PacketBeginningMessage(ptr) |
5f25509b SM |
342 | |
343 | def _create_packet_end_message(self, packet, default_clock_snapshot=None): | |
3fb99a22 | 344 | utils._check_type(packet, bt2_packet._Packet) |
5f25509b | 345 | |
e8ac1aae | 346 | if packet.stream.cls.packets_have_end_default_clock_snapshot: |
9ec609ec | 347 | if default_clock_snapshot is None: |
cfbd7cf3 FD |
348 | raise ValueError( |
349 | "packet end messages in this stream must have a default clock snapshot" | |
350 | ) | |
9ec609ec | 351 | |
5f25509b SM |
352 | utils._check_uint64(default_clock_snapshot) |
353 | ptr = native_bt.message_packet_end_create_with_default_clock_snapshot( | |
cfbd7cf3 FD |
354 | self._bt_ptr, packet._ptr, default_clock_snapshot |
355 | ) | |
5f25509b | 356 | else: |
9ec609ec | 357 | if default_clock_snapshot is not None: |
cfbd7cf3 FD |
358 | raise ValueError( |
359 | "packet end messages in this stream must not have a default clock snapshot" | |
360 | ) | |
9ec609ec | 361 | |
85906b6b | 362 | ptr = native_bt.message_packet_end_create(self._bt_ptr, packet._ptr) |
5f25509b SM |
363 | |
364 | if ptr is None: | |
f5567ea8 | 365 | raise bt2._MemoryError("cannot create packet end message object") |
5f25509b | 366 | |
3fb99a22 | 367 | return bt2_message._PacketEndMessage(ptr) |
9ec609ec | 368 | |
cfbd7cf3 FD |
369 | def _create_discarded_events_message( |
370 | self, stream, count=None, beg_clock_snapshot=None, end_clock_snapshot=None | |
371 | ): | |
3fb99a22 | 372 | utils._check_type(stream, bt2_stream._Stream) |
9ec609ec | 373 | |
e8ac1aae | 374 | if not stream.cls.supports_discarded_events: |
f5567ea8 | 375 | raise ValueError("stream class does not support discarded events") |
2e90378a | 376 | |
e8ac1aae | 377 | if stream.cls.discarded_events_have_default_clock_snapshots: |
2e90378a | 378 | if beg_clock_snapshot is None or end_clock_snapshot is None: |
cfbd7cf3 | 379 | raise ValueError( |
f5567ea8 | 380 | "discarded events have default clock snapshots for this stream class" |
cfbd7cf3 | 381 | ) |
2e90378a | 382 | |
9ec609ec SM |
383 | utils._check_uint64(beg_clock_snapshot) |
384 | utils._check_uint64(end_clock_snapshot) | |
5d9ef4cb SM |
385 | |
386 | if beg_clock_snapshot > end_clock_snapshot: | |
387 | raise ValueError( | |
f5567ea8 | 388 | "beginning default clock snapshot value ({}) is greater than end default clock snapshot value ({})".format( |
5d9ef4cb SM |
389 | beg_clock_snapshot, end_clock_snapshot |
390 | ) | |
391 | ) | |
392 | ||
776a2a25 PP |
393 | ptr = ( |
394 | native_bt.message_discarded_events_create_with_default_clock_snapshots( | |
395 | self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot | |
396 | ) | |
cfbd7cf3 | 397 | ) |
9ec609ec | 398 | else: |
2e90378a | 399 | if beg_clock_snapshot is not None or end_clock_snapshot is not None: |
cfbd7cf3 | 400 | raise ValueError( |
f5567ea8 | 401 | "discarded events have no default clock snapshots for this stream class" |
cfbd7cf3 | 402 | ) |
2e90378a | 403 | |
cfbd7cf3 | 404 | ptr = native_bt.message_discarded_events_create(self._bt_ptr, stream._ptr) |
9ec609ec SM |
405 | |
406 | if ptr is None: | |
f5567ea8 | 407 | raise bt2._MemoryError("cannot discarded events message object") |
9ec609ec | 408 | |
3fb99a22 | 409 | msg = bt2_message._DiscardedEventsMessage(ptr) |
9ec609ec SM |
410 | |
411 | if count is not None: | |
412 | msg._count = count | |
413 | ||
414 | return msg | |
415 | ||
cfbd7cf3 FD |
416 | def _create_discarded_packets_message( |
417 | self, stream, count=None, beg_clock_snapshot=None, end_clock_snapshot=None | |
418 | ): | |
3fb99a22 | 419 | utils._check_type(stream, bt2_stream._Stream) |
9ec609ec | 420 | |
e8ac1aae | 421 | if not stream.cls.supports_discarded_packets: |
f5567ea8 | 422 | raise ValueError("stream class does not support discarded packets") |
2e90378a | 423 | |
e8ac1aae | 424 | if stream.cls.discarded_packets_have_default_clock_snapshots: |
2e90378a | 425 | if beg_clock_snapshot is None or end_clock_snapshot is None: |
cfbd7cf3 | 426 | raise ValueError( |
f5567ea8 | 427 | "discarded packets have default clock snapshots for this stream class" |
cfbd7cf3 | 428 | ) |
2e90378a | 429 | |
9ec609ec SM |
430 | utils._check_uint64(beg_clock_snapshot) |
431 | utils._check_uint64(end_clock_snapshot) | |
5d9ef4cb SM |
432 | |
433 | if beg_clock_snapshot > end_clock_snapshot: | |
434 | raise ValueError( | |
f5567ea8 | 435 | "beginning default clock snapshot value ({}) is greater than end default clock snapshot value ({})".format( |
5d9ef4cb SM |
436 | beg_clock_snapshot, end_clock_snapshot |
437 | ) | |
438 | ) | |
439 | ||
776a2a25 PP |
440 | ptr = ( |
441 | native_bt.message_discarded_packets_create_with_default_clock_snapshots( | |
442 | self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot | |
443 | ) | |
cfbd7cf3 | 444 | ) |
9ec609ec | 445 | else: |
2e90378a | 446 | if beg_clock_snapshot is not None or end_clock_snapshot is not None: |
cfbd7cf3 | 447 | raise ValueError( |
f5567ea8 | 448 | "discarded packets have no default clock snapshots for this stream class" |
cfbd7cf3 | 449 | ) |
2e90378a | 450 | |
cfbd7cf3 | 451 | ptr = native_bt.message_discarded_packets_create(self._bt_ptr, stream._ptr) |
9ec609ec SM |
452 | |
453 | if ptr is None: | |
f5567ea8 | 454 | raise bt2._MemoryError("cannot discarded packets message object") |
9ec609ec | 455 | |
3fb99a22 | 456 | msg = bt2_message._DiscardedPacketsMessage(ptr) |
9ec609ec SM |
457 | |
458 | if count is not None: | |
459 | msg._count = count | |
460 | ||
461 | return msg |