File
Blob: firmware/vendor/str0m/src/packet/buffer_rx.rs
| 1 | use std::collections::VecDeque; |
| 2 | use std::fmt; |
| 3 | use std::ops::{Range, RangeInclusive}; |
| 4 | use std::sync::Arc; |
| 5 | use std::time::Instant; |
| 6 | |
| 7 | use crate::rtp::vla::VideoLayersAllocation; |
| 8 | use crate::rtp_::{ExtensionValues, MediaTime, RtpHeader, SenderInfo, SeqNo}; |
| 9 | |
| 10 | use super::contiguity::Contiguity; |
| 11 | use super::contiguity_vp8::Vp8Contiguity; |
| 12 | use super::contiguity_vp9::Vp9Contiguity; |
| 13 | use super::{CodecDepacketizer, CodecExtra, Depacketizer, PacketError}; |
| 14 | |
| 15 | #[derive(Clone, PartialEq, Eq)] |
| 16 | /// Holds metadata incoming RTP data. |
| 17 | pub struct RtpMeta { |
| 18 | /// When this RTP packet was received. |
| 19 | pub received: Instant, |
| 20 | /// Media time translated from the RtpHeader time. |
| 21 | pub time: MediaTime, |
| 22 | /// Sequence number, extended from the RTPHeader. |
| 23 | pub seq_no: SeqNo, |
| 24 | /// The actual header. |
| 25 | pub header: RtpHeader, |
| 26 | /// Sender information from the most recent Sender Report(SR). |
| 27 | /// |
| 28 | /// If no Sender Report(SR) has been received this is [`None`]. |
| 29 | pub last_sender_info: Option<SenderInfo>, |
| 30 | } |
| 31 | |
| 32 | #[derive(Clone)] |
| 33 | pub struct Depacketized { |
| 34 | pub time: MediaTime, |
| 35 | pub contiguous: bool, |
| 36 | pub meta: Vec<RtpMeta>, |
| 37 | pub data: Vec<u8>, |
| 38 | pub codec_extra: CodecExtra, |
| 39 | } |
| 40 | |
| 41 | impl Depacketized { |
| 42 | pub fn first_network_time(&self) -> Instant { |
| 43 | self.meta |
| 44 | .iter() |
| 45 | .map(|m| m.received) |
| 46 | .min() |
| 47 | .expect("a depacketized to consist of at least one packet") |
| 48 | } |
| 49 | |
| 50 | pub fn first_sender_info(&self) -> Option<SenderInfo> { |
| 51 | self.meta |
| 52 | .iter() |
| 53 | .min_by_key(|m| m.received) |
| 54 | .map(|m| m.last_sender_info) |
| 55 | .expect("a depacketized to consist of at least one packet") |
| 56 | } |
| 57 | |
| 58 | pub fn seq_range(&self) -> RangeInclusive<SeqNo> { |
| 59 | let first = self |
| 60 | .meta |
| 61 | .first() |
| 62 | .expect("a depacketized to consist of at least one packet") |
| 63 | .seq_no; |
| 64 | let last = self |
| 65 | .meta |
| 66 | .last() |
| 67 | .expect("a depacketized to consist of at least one packet") |
| 68 | .seq_no; |
| 69 | first..=last |
| 70 | } |
| 71 | |
| 72 | pub fn start_of_talkspurt(&self) -> bool { |
| 73 | self.meta |
| 74 | .first() |
| 75 | .expect("a depacketized to consist of at least one packet") |
| 76 | .header |
| 77 | .marker |
| 78 | } |
| 79 | |
| 80 | pub fn ext_vals(&self) -> ExtensionValues { |
| 81 | let last = &self |
| 82 | .meta |
| 83 | .last() |
| 84 | .expect("depacketized video frame must contain a trailing packet") |
| 85 | .header |
| 86 | .ext_vals; |
| 87 | |
| 88 | let first = &self |
| 89 | .meta |
| 90 | .first() |
| 91 | .expect("depacketized video frame must contain a leading packet") |
| 92 | .header |
| 93 | .ext_vals; |
| 94 | |
| 95 | // We use the extensions from the last packet because certain extensions, such as video |
| 96 | // orientation, are only added on the last packet to save bytes. |
| 97 | let mut merged = last.clone(); |
| 98 | |
| 99 | // str0m strictly attaches some fields to the first packet of a frame. |
| 100 | if let Some(first_val) = &first.abs_capture_time { |
| 101 | merged.abs_capture_time = Some(*first_val); |
| 102 | } |
| 103 | |
| 104 | if let Some(first_val) = first.user_values.get_arc::<VideoLayersAllocation>() { |
| 105 | merged.user_values.set_arc(first_val); |
| 106 | } |
| 107 | |
| 108 | merged |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | #[derive(Debug)] |
| 113 | struct Entry { |
| 114 | meta: RtpMeta, |
| 115 | data: Arc<[u8]>, |
| 116 | head: bool, |
| 117 | tail: bool, |
| 118 | } |
| 119 | |
| 120 | #[derive(Debug)] |
| 121 | pub struct DepacketizingBuffer { |
| 122 | hold_back: usize, |
| 123 | depack: CodecDepacketizer, |
| 124 | queue: VecDeque<Entry>, |
| 125 | segments: Vec<(usize, usize)>, |
| 126 | last_emitted: Option<(SeqNo, CodecExtra)>, |
| 127 | max_time: Option<MediaTime>, |
| 128 | depack_cache: Option<(Range<usize>, Depacketized)>, |
| 129 | contiguity: Contiguity, |
| 130 | } |
| 131 | |
| 132 | impl DepacketizingBuffer { |
| 133 | pub(crate) fn new(depack: CodecDepacketizer, hold_back: usize) -> Self { |
| 134 | let contiguity = match depack { |
| 135 | CodecDepacketizer::Vp8(_) => Contiguity::Vp8(Vp8Contiguity::new()), |
| 136 | CodecDepacketizer::Vp9(_) => Contiguity::Vp9(Vp9Contiguity::new()), |
| 137 | CodecDepacketizer::H264(_) |
| 138 | | CodecDepacketizer::H265(_) |
| 139 | | CodecDepacketizer::H266(_) |
| 140 | | CodecDepacketizer::Av1(_) |
| 141 | | CodecDepacketizer::Boxed(_) |
| 142 | | CodecDepacketizer::Opus(_) |
| 143 | | CodecDepacketizer::ComfortNoise(_) |
| 144 | | CodecDepacketizer::G711(_) |
| 145 | | CodecDepacketizer::Null(_) => Contiguity::None, |
| 146 | }; |
| 147 | |
| 148 | DepacketizingBuffer { |
| 149 | hold_back, |
| 150 | depack, |
| 151 | queue: VecDeque::new(), |
| 152 | segments: Vec::new(), |
| 153 | last_emitted: None, |
| 154 | max_time: None, |
| 155 | depack_cache: None, |
| 156 | contiguity, |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | pub fn push(&mut self, meta: RtpMeta, data: impl Into<Arc<[u8]>>) { |
| 161 | self.push_entry(meta, data.into(), None); |
| 162 | } |
| 163 | |
| 164 | pub(crate) fn push_padding(&mut self, meta: RtpMeta) { |
| 165 | self.push_entry(meta, Arc::from([]), Some((false, false))); |
| 166 | } |
| 167 | |
| 168 | fn push_entry(&mut self, meta: RtpMeta, data: Arc<[u8]>, partition: Option<(bool, bool)>) { |
| 169 | // We're not emitting frames in the wrong order. If we receive |
| 170 | // packets that are before the last emitted, we drop. |
| 171 | // |
| 172 | // As a special case, per popular demand, if hold_back is 0, we do emit |
| 173 | // out of order packets. |
| 174 | if let Some((last, _)) = self.last_emitted { |
| 175 | if meta.seq_no <= last && self.hold_back > 0 { |
| 176 | trace!("Drop before emitted: {} <= {}", meta.seq_no, last); |
| 177 | return; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | // Record that latest seen max time (used for extending time to u64). |
| 182 | self.max_time = Some(if let Some(m) = self.max_time { |
| 183 | m.max(meta.time) |
| 184 | } else { |
| 185 | meta.time |
| 186 | }); |
| 187 | |
| 188 | match self |
| 189 | .queue |
| 190 | .binary_search_by_key(&meta.seq_no, |r| r.meta.seq_no) |
| 191 | { |
| 192 | Ok(_) => { |
| 193 | // exact same seq_no found. ignore |
| 194 | trace!("Drop exactly same packet: {}", meta.seq_no); |
| 195 | } |
| 196 | Err(i) => { |
| 197 | let (head, tail) = partition.unwrap_or_else(|| { |
| 198 | ( |
| 199 | self.depack.is_partition_head(data.as_ref()), |
| 200 | self.depack |
| 201 | .is_partition_tail(meta.header.marker, data.as_ref()), |
| 202 | ) |
| 203 | }); |
| 204 | |
| 205 | // i is insertion point to maintain order |
| 206 | let entry = Entry { |
| 207 | meta, |
| 208 | data, |
| 209 | head, |
| 210 | tail, |
| 211 | }; |
| 212 | self.queue.insert(i, entry); |
| 213 | } |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | pub fn pop(&mut self) -> Option<Result<Depacketized, PacketError>> { |
| 218 | self.update_segments(); |
| 219 | |
| 220 | if self.segments.is_empty() { |
| 221 | self.discard_old_padding(); |
| 222 | return None; |
| 223 | } |
| 224 | |
| 225 | // println!( |
| 226 | // "{:?} {:?}", |
| 227 | // self.queue.iter().map(|e| e.meta.seq_no).collect::<Vec<_>>(), |
| 228 | // self.segments |
| 229 | // ); |
| 230 | |
| 231 | let (start, stop) = *self.segments.first().expect("segment exists"); |
| 232 | |
| 233 | let seq = { |
| 234 | let last = self.queue.get(stop).expect("entry for stop index"); |
| 235 | last.meta.seq_no |
| 236 | }; |
| 237 | |
| 238 | // depack ahead, even if we may not emit right away |
| 239 | let mut dep = match self.depacketize(start, stop, seq) { |
| 240 | Ok(d) => d, |
| 241 | Err(e) => { |
| 242 | // this segment cannot be decoded correctly |
| 243 | // remove from the queue and return the error |
| 244 | self.last_emitted = Some((seq, CodecExtra::None)); |
| 245 | self.queue.drain(0..=stop); |
| 246 | return Some(Err(e)); |
| 247 | } |
| 248 | }; |
| 249 | |
| 250 | // If we have contiguity of seq numbers we emit right away, |
| 251 | // Otherwise, we wait for retransmissions up to `hold_back` frames |
| 252 | // and re-evaluate contiguity based on codec specific information |
| 253 | |
| 254 | let more_than_hold_back = self.segments.len() >= self.hold_back; |
| 255 | let contiguous_seq = self.is_following_last(start); |
| 256 | let wait_for_contiguity = !contiguous_seq && !more_than_hold_back; |
| 257 | |
| 258 | if wait_for_contiguity { |
| 259 | // if we are not sending, cache the depacked |
| 260 | self.depack_cache = Some((start..stop, dep)); |
| 261 | self.discard_old_padding(); |
| 262 | return None; |
| 263 | } |
| 264 | |
| 265 | let (can_emit, contiguous_codec) = self.contiguity.check(&dep.codec_extra, contiguous_seq); |
| 266 | dep.contiguous = contiguous_codec; |
| 267 | |
| 268 | let last = self |
| 269 | .queue |
| 270 | .get(stop) |
| 271 | .expect("entry for stop index") |
| 272 | .meta |
| 273 | .seq_no; |
| 274 | |
| 275 | // We're not going to emit frames in the incorrect order, there's no point in keeping |
| 276 | // stuff before the emitted range. |
| 277 | self.queue.drain(0..=stop); |
| 278 | |
| 279 | if !can_emit { |
| 280 | return None; |
| 281 | } |
| 282 | |
| 283 | self.last_emitted = Some((last, dep.codec_extra)); |
| 284 | |
| 285 | Some(Ok(dep)) |
| 286 | } |
| 287 | |
| 288 | fn discard_old_padding(&mut self) { |
| 289 | let original_len = self.queue.len(); |
| 290 | let is_padding = |entry: &Entry| entry.data.is_empty() && !entry.head && !entry.tail; |
| 291 | |
| 292 | if let Some((mut last, extra)) = self.last_emitted { |
| 293 | while self.queue.len() > self.hold_back { |
| 294 | let entry = self.queue.front().expect("queue exceeds hold back"); |
| 295 | if !is_padding(entry) { |
| 296 | break; |
| 297 | } |
| 298 | |
| 299 | if last.is_next(entry.meta.seq_no) { |
| 300 | last = entry.meta.seq_no; |
| 301 | } |
| 302 | self.queue.pop_front(); |
| 303 | } |
| 304 | |
| 305 | self.last_emitted = Some((last, extra)); |
| 306 | } |
| 307 | |
| 308 | // An incomplete frame can remain at the front while another payload type |
| 309 | // contributes synthetic padding indefinitely. Keep the frame, but retain |
| 310 | // only the newest padding needed for the reordering window. Padding removed |
| 311 | // from behind media cannot advance last_emitted across that media. |
| 312 | let mut excess_padding = self |
| 313 | .queue |
| 314 | .iter() |
| 315 | .filter(|entry| is_padding(entry)) |
| 316 | .count() |
| 317 | .saturating_sub(self.hold_back); |
| 318 | self.queue.retain(|entry| { |
| 319 | if excess_padding > 0 && is_padding(entry) { |
| 320 | excess_padding -= 1; |
| 321 | false |
| 322 | } else { |
| 323 | true |
| 324 | } |
| 325 | }); |
| 326 | |
| 327 | if self.queue.len() != original_len { |
| 328 | self.depack_cache = None; |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | fn depacketize( |
| 333 | &mut self, |
| 334 | start: usize, |
| 335 | stop: usize, |
| 336 | _seq: SeqNo, |
| 337 | ) -> Result<Depacketized, PacketError> { |
| 338 | if let Some(cached) = self.depack_cache.take() { |
| 339 | if cached.0 == (start..stop) { |
| 340 | trace!("depack cache hit for segment start {}", start); |
| 341 | return Ok(cached.1); |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | let packets_size = self.queue.range(start..=stop).map(|p| p.data.len()).sum(); |
| 346 | let mut data = self |
| 347 | .depack |
| 348 | .out_size_hint(packets_size) |
| 349 | .map(Vec::with_capacity) |
| 350 | .unwrap_or_else(Vec::new); |
| 351 | let mut codec_extra = CodecExtra::None; |
| 352 | |
| 353 | let time = self.queue.get(start).expect("first index exist").meta.time; |
| 354 | let mut meta = Vec::with_capacity(stop - start + 1); |
| 355 | |
| 356 | for entry in self.queue.range_mut(start..=stop) { |
| 357 | self.depack |
| 358 | .depacketize(entry.data.as_ref(), &mut data, &mut codec_extra)?; |
| 359 | meta.push(entry.meta.clone()); |
| 360 | } |
| 361 | |
| 362 | Ok(Depacketized { |
| 363 | time, |
| 364 | contiguous: true, // the caller taking ownership will modify this accordingly |
| 365 | meta, |
| 366 | data, |
| 367 | codec_extra, |
| 368 | }) |
| 369 | } |
| 370 | |
| 371 | fn update_segments(&mut self) -> Option<(usize, usize)> { |
| 372 | self.segments.clear(); |
| 373 | |
| 374 | #[derive(Clone, Copy)] |
| 375 | struct Start { |
| 376 | index: i64, |
| 377 | time: MediaTime, |
| 378 | offset: i64, |
| 379 | } |
| 380 | |
| 381 | let mut start: Option<Start> = None; |
| 382 | |
| 383 | for (index, entry) in self.queue.iter().enumerate() { |
| 384 | let index = index as i64; |
| 385 | let iseq = *entry.meta.seq_no as i64; |
| 386 | let expected_seq = start.map(|s| s.offset.saturating_add(index)); |
| 387 | |
| 388 | let is_expected_seq = expected_seq == Some(iseq); |
| 389 | let is_same_timestamp = start.map(|s| s.time) == Some(entry.meta.time); |
| 390 | let is_defacto_tail = is_expected_seq && !is_same_timestamp; |
| 391 | |
| 392 | if start.is_some() && is_defacto_tail { |
| 393 | // We found a segment that ended because the timestamp changed without |
| 394 | // a gap in the sequence number. The marker bit in the RTP packet is |
| 395 | // just indicative, this is the robust fallback. |
| 396 | let segment = (start.unwrap().index as usize, index as usize - 1); |
| 397 | self.segments.push(segment); |
| 398 | start = None; |
| 399 | } |
| 400 | |
| 401 | if start.is_some() && (!is_expected_seq || !is_same_timestamp) { |
| 402 | // Not contiguous. Start looking again. |
| 403 | start = None; |
| 404 | } |
| 405 | |
| 406 | // Each segment can have multiple is_partition_head() == true, record the first. |
| 407 | if start.is_none() && entry.head { |
| 408 | start = Some(Start { |
| 409 | index, |
| 410 | time: entry.meta.time, |
| 411 | offset: iseq.saturating_sub(index), |
| 412 | }); |
| 413 | } |
| 414 | |
| 415 | if start.is_some() && entry.tail { |
| 416 | // We found a contiguous sequence of packets ending with something from |
| 417 | // the packet (like the RTP marker bit) indicating it's the tail. |
| 418 | let segment = (start.unwrap().index as usize, index as usize); |
| 419 | self.segments.push(segment); |
| 420 | start = None; |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | None |
| 425 | } |
| 426 | |
| 427 | fn is_following_last(&self, start: usize) -> bool { |
| 428 | let Some((last, _)) = self.last_emitted else { |
| 429 | // First time we emit something. |
| 430 | return true; |
| 431 | }; |
| 432 | |
| 433 | // track sequence numbers are sequential |
| 434 | let mut seq = last; |
| 435 | |
| 436 | // Expect all entries before start to be padding. |
| 437 | for entry in self.queue.range(0..start) { |
| 438 | if !seq.is_next(entry.meta.seq_no) { |
| 439 | // Not a sequence |
| 440 | return false; |
| 441 | } |
| 442 | // for next loop round. |
| 443 | seq = entry.meta.seq_no; |
| 444 | |
| 445 | let is_padding = entry.data.is_empty() && !entry.head && !entry.tail; |
| 446 | if !is_padding { |
| 447 | return false; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | let start_entry = self.queue.get(start).expect("entry for start index"); |
| 452 | |
| 453 | seq.is_next(start_entry.meta.seq_no) |
| 454 | } |
| 455 | } |
| 456 | |
| 457 | impl fmt::Debug for RtpMeta { |
| 458 | fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| 459 | f.debug_struct("RtpMeta") |
| 460 | .field("received", &self.received) |
| 461 | .field("time", &self.time) |
| 462 | .field("seq_no", &self.seq_no) |
| 463 | .field("header", &self.header) |
| 464 | .finish() |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | impl fmt::Debug for Depacketized { |
| 469 | fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| 470 | f.debug_struct("Depacketized") |
| 471 | .field("time", &self.time) |
| 472 | .field("meta", &self.meta) |
| 473 | .field("data", &self.data.len()) |
| 474 | .finish() |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | #[cfg(test)] |
| 479 | mod test { |
| 480 | use std::time::{Duration, Instant, SystemTime}; |
| 481 | |
| 482 | use super::*; |
| 483 | use crate::packet::vp9::Vp9Depacketizer; |
| 484 | use crate::rtp::UserExtensionValues; |
| 485 | use crate::rtp_::{AbsCaptureTime, Frequency, MediaTime, Pt, Ssrc, VideoOrientation}; |
| 486 | |
| 487 | #[test] |
| 488 | fn end_on_marker() { |
| 489 | test(&[ |
| 490 | // |
| 491 | (1, 1, &[1], &[]), |
| 492 | (2, 1, &[9], &[(1, &[1, 9])]), |
| 493 | ]) |
| 494 | } |
| 495 | |
| 496 | #[test] |
| 497 | fn ext_vals_extracts_from_first_and_last_packet() { |
| 498 | let first_time = Instant::now(); |
| 499 | let abs_capture_time = AbsCaptureTime { |
| 500 | capture_time: SystemTime::UNIX_EPOCH + Duration::from_secs(1), |
| 501 | clock_offset: None, |
| 502 | }; |
| 503 | let mut vla = UserExtensionValues::default(); |
| 504 | vla.set(VideoLayersAllocation { |
| 505 | current_simulcast_stream_index: 1, |
| 506 | simulcast_streams: vec![], |
| 507 | }); |
| 508 | |
| 509 | let first_header = RtpHeader { |
| 510 | version: 2, |
| 511 | has_padding: false, |
| 512 | has_extension: true, |
| 513 | csrc_count: 0, |
| 514 | marker: false, |
| 515 | payload_type: Pt::new_with_value(98), |
| 516 | sequence_number: 1, |
| 517 | timestamp: 100, |
| 518 | ssrc: Ssrc::from(42), |
| 519 | csrc: [0; 15], |
| 520 | ext_vals: ExtensionValues { |
| 521 | abs_capture_time: Some(abs_capture_time), |
| 522 | user_values: vla.clone(), |
| 523 | ..Default::default() |
| 524 | }, |
| 525 | header_len: 0, |
| 526 | }; |
| 527 | |
| 528 | let last_header = RtpHeader { |
| 529 | ext_vals: ExtensionValues { |
| 530 | video_orientation: Some(VideoOrientation::Deg90), |
| 531 | ..Default::default() |
| 532 | }, |
| 533 | ..first_header.clone() |
| 534 | }; |
| 535 | |
| 536 | let time_value = 100_u64; |
| 537 | let dep = Depacketized { |
| 538 | time: MediaTime::new(time_value, Frequency::new(90000).unwrap()), |
| 539 | contiguous: true, |
| 540 | meta: vec![ |
| 541 | RtpMeta { |
| 542 | received: first_time, |
| 543 | time: MediaTime::new(time_value, Frequency::new(90000).unwrap()), |
| 544 | seq_no: SeqNo::from(1u64), |
| 545 | header: first_header, |
| 546 | last_sender_info: None, |
| 547 | }, |
| 548 | RtpMeta { |
| 549 | received: first_time + Duration::from_millis(1), |
| 550 | time: MediaTime::new(time_value, Frequency::new(90000).unwrap()), |
| 551 | seq_no: SeqNo::from(2u64), |
| 552 | header: last_header, |
| 553 | last_sender_info: None, |
| 554 | }, |
| 555 | ], |
| 556 | data: Vec::new(), |
| 557 | codec_extra: CodecExtra::None, |
| 558 | }; |
| 559 | |
| 560 | let merged = dep.ext_vals(); |
| 561 | assert_eq!( |
| 562 | merged.abs_capture_time.unwrap().capture_time, |
| 563 | abs_capture_time.capture_time |
| 564 | ); |
| 565 | assert_eq!( |
| 566 | merged |
| 567 | .user_values |
| 568 | .get::<VideoLayersAllocation>() |
| 569 | .unwrap() |
| 570 | .current_simulcast_stream_index, |
| 571 | vla.get::<VideoLayersAllocation>() |
| 572 | .unwrap() |
| 573 | .current_simulcast_stream_index, |
| 574 | ); |
| 575 | assert_eq!(merged.video_orientation, Some(VideoOrientation::Deg90)); |
| 576 | } |
| 577 | |
| 578 | #[test] |
| 579 | fn end_on_defacto() { |
| 580 | test(&[ |
| 581 | (1, 1, &[1], &[]), |
| 582 | (2, 1, &[2], &[]), |
| 583 | (3, 2, &[3], &[(1, &[1, 2])]), |
| 584 | ]) |
| 585 | } |
| 586 | |
| 587 | #[test] |
| 588 | fn skip_padding() { |
| 589 | test(&[ |
| 590 | (1, 1, &[1], &[]), |
| 591 | (2, 1, &[9], &[(1, &[1, 9])]), |
| 592 | (3, 1, &[], &[]), // padding! |
| 593 | (4, 2, &[1], &[]), |
| 594 | (5, 2, &[9], &[(2, &[1, 9])]), |
| 595 | ]) |
| 596 | } |
| 597 | |
| 598 | #[test] |
| 599 | fn gap_after_emit() { |
| 600 | test(&[ |
| 601 | (1, 1, &[1], &[]), |
| 602 | (2, 1, &[9], &[(1, &[1, 9])]), |
| 603 | // gap |
| 604 | (4, 2, &[1], &[]), |
| 605 | (5, 2, &[9], &[]), |
| 606 | ]) |
| 607 | } |
| 608 | |
| 609 | #[test] |
| 610 | fn gap_after_padding() { |
| 611 | test(&[ |
| 612 | (1, 1, &[1], &[]), |
| 613 | (2, 1, &[9], &[(1, &[1, 9])]), |
| 614 | (3, 1, &[], &[]), // padding! |
| 615 | // gap |
| 616 | (5, 2, &[1], &[]), |
| 617 | (6, 2, &[9], &[]), |
| 618 | ]) |
| 619 | } |
| 620 | |
| 621 | #[test] |
| 622 | fn single_packets() { |
| 623 | test(&[ |
| 624 | (1, 1, &[1, 9], &[(1, &[1, 9])]), |
| 625 | (2, 2, &[1, 9], &[(2, &[1, 9])]), |
| 626 | (3, 3, &[1, 9], &[(3, &[1, 9])]), |
| 627 | (4, 4, &[1, 9], &[(4, &[1, 9])]), |
| 628 | ]) |
| 629 | } |
| 630 | |
| 631 | #[test] |
| 632 | fn packets_out_of_order() { |
| 633 | test(&[ |
| 634 | (1, 1, &[1], &[]), |
| 635 | (2, 1, &[9], &[(1, &[1, 9])]), |
| 636 | (4, 2, &[9], &[]), |
| 637 | (3, 2, &[1], &[(2, &[1, 9])]), |
| 638 | ]) |
| 639 | } |
| 640 | |
| 641 | #[test] |
| 642 | fn packets_after_hold_out() { |
| 643 | test(&[ |
| 644 | (1, 1, &[1, 9], &[(1, &[1, 9])]), |
| 645 | (3, 3, &[1, 9], &[]), |
| 646 | (4, 4, &[1, 9], &[]), |
| 647 | (5, 5, &[1, 9], &[(3, &[1, 9]), (4, &[1, 9]), (5, &[1, 9])]), |
| 648 | ]) |
| 649 | } |
| 650 | |
| 651 | #[test] |
| 652 | fn packets_with_hold_0() { |
| 653 | test0(&[ |
| 654 | (1, 1, &[1, 9], &[(1, &[1, 9])]), |
| 655 | (3, 3, &[1, 9], &[(3, &[1, 9])]), |
| 656 | (4, 4, &[1, 9], &[(4, &[1, 9])]), |
| 657 | (5, 5, &[1, 9], &[(5, &[1, 9])]), |
| 658 | ]) |
| 659 | } |
| 660 | |
| 661 | #[test] |
| 662 | fn out_of_order_packets_with_hold_0() { |
| 663 | test0(&[ |
| 664 | (3, 1, &[1, 9], &[(1, &[1, 9])]), |
| 665 | (1, 3, &[1, 9], &[(3, &[1, 9])]), |
| 666 | (5, 4, &[1, 9], &[(4, &[1, 9])]), |
| 667 | (2, 5, &[1, 9], &[(5, &[1, 9])]), |
| 668 | ]) |
| 669 | } |
| 670 | |
| 671 | #[test] |
| 672 | fn padding_only_run_does_not_grow_the_queue_without_bound() { |
| 673 | let depack = CodecDepacketizer::Boxed(Box::new(TestDepack)); |
| 674 | let mut buf = DepacketizingBuffer::new(depack, 3); |
| 675 | let meta = |seq: u64| RtpMeta { |
| 676 | received: Instant::now(), |
| 677 | seq_no: seq.into(), |
| 678 | time: MediaTime::from_90khz(seq), |
| 679 | last_sender_info: None, |
| 680 | header: RtpHeader { |
| 681 | sequence_number: seq as u16, |
| 682 | timestamp: seq as u32, |
| 683 | ..Default::default() |
| 684 | }, |
| 685 | }; |
| 686 | |
| 687 | // Emit one packet for this PT, then model a long run on another PT. |
| 688 | buf.push(meta(1), vec![1, 9]); |
| 689 | assert!(buf.pop().is_some()); |
| 690 | |
| 691 | for seq in 2..=1_001 { |
| 692 | buf.push_padding(meta(seq)); |
| 693 | assert!(buf.pop().is_none()); |
| 694 | } |
| 695 | |
| 696 | assert!( |
| 697 | buf.queue.len() <= buf.hold_back, |
| 698 | "padding-only queue retained {} entries after a 1,000-packet run", |
| 699 | buf.queue.len() |
| 700 | ); |
| 701 | |
| 702 | // Returning to this PT after compaction must still be contiguous with the last packet. |
| 703 | buf.push(meta(1_002), vec![1, 9]); |
| 704 | let dep = buf.pop().expect("packet emitted").expect("valid packet"); |
| 705 | assert!(dep.contiguous); |
| 706 | } |
| 707 | |
| 708 | #[test] |
| 709 | fn padding_only_run_with_loss_stays_bounded_and_reports_discontinuity() { |
| 710 | let depack = CodecDepacketizer::Boxed(Box::new(TestDepack)); |
| 711 | let mut buf = DepacketizingBuffer::new(depack, 3); |
| 712 | let meta = |seq: u64| RtpMeta { |
| 713 | received: Instant::now(), |
| 714 | seq_no: seq.into(), |
| 715 | time: MediaTime::from_90khz(seq), |
| 716 | last_sender_info: None, |
| 717 | header: RtpHeader { |
| 718 | sequence_number: seq as u16, |
| 719 | timestamp: seq as u32, |
| 720 | ..Default::default() |
| 721 | }, |
| 722 | }; |
| 723 | |
| 724 | buf.push(meta(1), vec![1, 9]); |
| 725 | assert!(buf.pop().is_some()); |
| 726 | |
| 727 | // Sequence 2 is lost while another PT remains active. |
| 728 | for seq in 3..=1_002 { |
| 729 | buf.push_padding(meta(seq)); |
| 730 | assert!(buf.pop().is_none()); |
| 731 | } |
| 732 | |
| 733 | assert!(buf.queue.len() <= buf.hold_back); |
| 734 | |
| 735 | // A discontinuity waits for the normal hold-back before it is emitted. |
| 736 | buf.push(meta(1_003), vec![1, 9]); |
| 737 | assert!(buf.pop().is_none()); |
| 738 | buf.push(meta(1_004), vec![1, 9]); |
| 739 | assert!(buf.pop().is_none()); |
| 740 | buf.push(meta(1_005), vec![1, 9]); |
| 741 | let dep = buf.pop().expect("packet emitted").expect("valid packet"); |
| 742 | assert!(!dep.contiguous); |
| 743 | } |
| 744 | |
| 745 | #[test] |
| 746 | fn padding_after_incomplete_vp8_frame_does_not_grow_without_bound() { |
| 747 | let depack = CodecDepacketizer::Vp8(Default::default()); |
| 748 | let mut buf = DepacketizingBuffer::new(depack, 3); |
| 749 | let meta = |seq: u64, marker: bool| RtpMeta { |
| 750 | received: Instant::now(), |
| 751 | seq_no: seq.into(), |
| 752 | time: MediaTime::from_90khz(seq), |
| 753 | last_sender_info: None, |
| 754 | header: RtpHeader { |
| 755 | marker, |
| 756 | sequence_number: seq as u16, |
| 757 | timestamp: seq as u32, |
| 758 | ..Default::default() |
| 759 | }, |
| 760 | }; |
| 761 | |
| 762 | // Emit one complete VP8 frame for this PT. |
| 763 | buf.push(meta(1, true), [0x10, 0x00]); |
| 764 | assert!(buf.pop().is_some()); |
| 765 | |
| 766 | // The next frame's head is lost, leaving an S=0 fragment at the front. |
| 767 | buf.push(meta(2, false), [0x00]); |
| 768 | assert!(buf.pop().is_none()); |
| 769 | |
| 770 | // The sender switches PT. Every packet becomes synthetic padding here. |
| 771 | for seq in 3..=1_002 { |
| 772 | buf.push_padding(meta(seq, false)); |
| 773 | assert!(buf.pop().is_none()); |
| 774 | } |
| 775 | |
| 776 | assert!( |
| 777 | buf.queue.len() <= buf.hold_back + 1, |
| 778 | "incomplete VP8 frame retained {} entries after a 1,000-packet PT switch", |
| 779 | buf.queue.len() |
| 780 | ); |
| 781 | } |
| 782 | |
| 783 | #[test] |
| 784 | fn padding_after_waiting_vp8_frame_does_not_grow_without_bound() { |
| 785 | let depack = CodecDepacketizer::Vp8(Default::default()); |
| 786 | let mut buf = DepacketizingBuffer::new(depack, 3); |
| 787 | let meta = |seq: u64, marker: bool| RtpMeta { |
| 788 | received: Instant::now(), |
| 789 | seq_no: seq.into(), |
| 790 | time: MediaTime::from_90khz(seq), |
| 791 | last_sender_info: None, |
| 792 | header: RtpHeader { |
| 793 | marker, |
| 794 | sequence_number: seq as u16, |
| 795 | timestamp: seq as u32, |
| 796 | ..Default::default() |
| 797 | }, |
| 798 | }; |
| 799 | |
| 800 | buf.push(meta(1, true), [0x10, 0x00]); |
| 801 | assert!(buf.pop().is_some()); |
| 802 | |
| 803 | // Lose a frame head, then switch away long enough to compact its padding. |
| 804 | buf.push(meta(2, false), [0x00]); |
| 805 | assert!(buf.pop().is_none()); |
| 806 | for seq in 3..=1_002 { |
| 807 | buf.push_padding(meta(seq, false)); |
| 808 | assert!(buf.pop().is_none()); |
| 809 | } |
| 810 | |
| 811 | // One complete frame returns, but waits behind the orphan for hold-back. |
| 812 | buf.push(meta(1_003, true), [0x10, 0x00]); |
| 813 | assert!(buf.pop().is_none()); |
| 814 | |
| 815 | // Switching away again must remain bounded while that frame waits. |
| 816 | for seq in 1_004..=2_003 { |
| 817 | buf.push_padding(meta(seq, false)); |
| 818 | assert!(buf.pop().is_none()); |
| 819 | } |
| 820 | |
| 821 | assert!( |
| 822 | buf.queue.len() <= buf.hold_back + 2, |
| 823 | "waiting VP8 frame retained {} entries after a second 1,000-packet PT switch", |
| 824 | buf.queue.len() |
| 825 | ); |
| 826 | } |
| 827 | |
| 828 | #[test] |
| 829 | fn padding_after_initial_incomplete_vp8_frame_does_not_grow_without_bound() { |
| 830 | let depack = CodecDepacketizer::Vp8(Default::default()); |
| 831 | let mut buf = DepacketizingBuffer::new(depack, 3); |
| 832 | let meta = |seq: u64| RtpMeta { |
| 833 | received: Instant::now(), |
| 834 | seq_no: seq.into(), |
| 835 | time: MediaTime::from_90khz(seq), |
| 836 | last_sender_info: None, |
| 837 | header: RtpHeader { |
| 838 | sequence_number: seq as u16, |
| 839 | timestamp: seq as u32, |
| 840 | ..Default::default() |
| 841 | }, |
| 842 | }; |
| 843 | |
| 844 | // Start observing this PT after the head of a VP8 frame was lost. |
| 845 | buf.push(meta(1), [0x00]); |
| 846 | assert!(buf.pop().is_none()); |
| 847 | |
| 848 | // The sender switches PT before this depayloader has emitted anything. |
| 849 | for seq in 2..=1_001 { |
| 850 | buf.push_padding(meta(seq)); |
| 851 | assert!(buf.pop().is_none()); |
| 852 | } |
| 853 | |
| 854 | assert!( |
| 855 | buf.queue.len() <= buf.hold_back + 1, |
| 856 | "initial incomplete VP8 frame retained {} entries after a 1,000-packet PT switch", |
| 857 | buf.queue.len() |
| 858 | ); |
| 859 | } |
| 860 | |
| 861 | fn test( |
| 862 | v: &[( |
| 863 | u64, // seq |
| 864 | u64, // time |
| 865 | &[u8], // data |
| 866 | &[( |
| 867 | u64, // time |
| 868 | &[u8], // depacketized data |
| 869 | )], |
| 870 | )], |
| 871 | ) { |
| 872 | test_n(3, v) |
| 873 | } |
| 874 | |
| 875 | fn test0( |
| 876 | v: &[( |
| 877 | u64, // seq |
| 878 | u64, // time |
| 879 | &[u8], // data |
| 880 | &[( |
| 881 | u64, // time |
| 882 | &[u8], // depacketized data |
| 883 | )], |
| 884 | )], |
| 885 | ) { |
| 886 | test_n(0, v) |
| 887 | } |
| 888 | |
| 889 | fn test_n( |
| 890 | hold_back: usize, |
| 891 | v: &[( |
| 892 | u64, // seq |
| 893 | u64, // time |
| 894 | &[u8], // data |
| 895 | &[( |
| 896 | u64, // time |
| 897 | &[u8], // depacketized data |
| 898 | )], |
| 899 | )], |
| 900 | ) { |
| 901 | let depack = CodecDepacketizer::Boxed(Box::new(TestDepack)); |
| 902 | let mut buf = DepacketizingBuffer::new(depack, hold_back); |
| 903 | |
| 904 | let mut step = 1; |
| 905 | |
| 906 | for (seq, time, data, checks) in v { |
| 907 | let meta = RtpMeta { |
| 908 | received: Instant::now(), |
| 909 | seq_no: (*seq).into(), |
| 910 | time: MediaTime::from_90khz(*time), |
| 911 | last_sender_info: None, |
| 912 | header: RtpHeader { |
| 913 | sequence_number: *seq as u16, |
| 914 | timestamp: *time as u32, |
| 915 | ..Default::default() |
| 916 | }, |
| 917 | }; |
| 918 | |
| 919 | buf.push(meta, data.to_vec()); |
| 920 | |
| 921 | let mut depacks = vec![]; |
| 922 | while let Some(res) = buf.pop() { |
| 923 | let d = res.unwrap(); |
| 924 | depacks.push(d); |
| 925 | } |
| 926 | |
| 927 | assert_eq!( |
| 928 | depacks.len(), |
| 929 | checks.len(), |
| 930 | "Step {}: check count not matching {} != {}", |
| 931 | step, |
| 932 | depacks.len(), |
| 933 | checks.len() |
| 934 | ); |
| 935 | |
| 936 | let iter = depacks.into_iter().zip(checks.iter()); |
| 937 | |
| 938 | for (depack, (dtime, ddata)) in iter { |
| 939 | assert_eq!( |
| 940 | depack.time.numer(), |
| 941 | *dtime, |
| 942 | "Step {}: Time not matching {} != {}", |
| 943 | step, |
| 944 | depack.time.numer(), |
| 945 | *dtime |
| 946 | ); |
| 947 | |
| 948 | assert_eq!( |
| 949 | depack.data, *ddata, |
| 950 | "Step {}: Data not correct {:?} != {:?}", |
| 951 | step, depack.data, *ddata |
| 952 | ); |
| 953 | } |
| 954 | |
| 955 | step += 1; |
| 956 | } |
| 957 | } |
| 958 | |
| 959 | #[derive(Debug)] |
| 960 | struct TestDepack; |
| 961 | |
| 962 | impl Depacketizer for TestDepack { |
| 963 | fn out_size_hint(&self, packets_size: usize) -> Option<usize> { |
| 964 | Some(packets_size) |
| 965 | } |
| 966 | |
| 967 | fn depacketize( |
| 968 | &mut self, |
| 969 | packet: &[u8], |
| 970 | out: &mut Vec<u8>, |
| 971 | _: &mut CodecExtra, |
| 972 | ) -> Result<(), PacketError> { |
| 973 | out.extend_from_slice(packet); |
| 974 | Ok(()) |
| 975 | } |
| 976 | |
| 977 | fn is_partition_head(&self, packet: &[u8]) -> bool { |
| 978 | !packet.is_empty() && packet[0] == 1 |
| 979 | } |
| 980 | |
| 981 | fn is_partition_tail(&self, _marker: bool, packet: &[u8]) -> bool { |
| 982 | !packet.is_empty() && packet.contains(&9) |
| 983 | } |
| 984 | } |
| 985 | |
| 986 | #[test] |
| 987 | fn rtp_out_of_order() { |
| 988 | let construct_input = |
| 989 | |(time, seq, marker, cc, data): (u32, u16, bool, u16, Vec<u8>)| -> (RtpMeta, Vec<u8>) { |
| 990 | ( |
| 991 | RtpMeta { |
| 992 | received: Instant::now(), |
| 993 | time: MediaTime::new(time.into(), Frequency::new(90000).unwrap()), |
| 994 | seq_no: SeqNo::from(seq as u64), |
| 995 | header: RtpHeader { |
| 996 | version: 2, |
| 997 | has_padding: false, |
| 998 | has_extension: true, |
| 999 | csrc_count: 0, |
| 1000 | marker, |
| 1001 | payload_type: Pt::new_with_value(98), |
| 1002 | sequence_number: seq, |
| 1003 | timestamp: time, |
| 1004 | ssrc: Ssrc::from(2930203832), |
| 1005 | csrc: [0; 15], |
| 1006 | ext_vals: ExtensionValues { |
| 1007 | transport_cc: Some(cc), |
| 1008 | ..Default::default() |
| 1009 | }, |
| 1010 | header_len: 28, |
| 1011 | }, |
| 1012 | last_sender_info: None, |
| 1013 | }, |
| 1014 | data, |
| 1015 | ) |
| 1016 | }; |
| 1017 | |
| 1018 | let inputs = [ |
| 1019 | // PID: 23860 |
| 1020 | ( |
| 1021 | 821395241, // Timestamp |
| 1022 | 8685, // SeqN |
| 1023 | false, // Marker |
| 1024 | 56, // Transport CC |
| 1025 | // VP9 header--------+ |
| 1026 | // | |
| 1027 | // +--------------------+ |
| 1028 | Vec::from([236, 221, 52, 80, 26, 10, 1, 1, 1, 1, 1, 1, 1, 1]), // Data |
| 1029 | ), |
| 1030 | // PID: 23860 |
| 1031 | ( |
| 1032 | 821395241, // Timestamp |
| 1033 | 8686, // SeqN |
| 1034 | true, // Marker |
| 1035 | 57, // Transport CC |
| 1036 | // VP9 header--------+ |
| 1037 | // | |
| 1038 | // +--------------------+ |
| 1039 | Vec::from([237, 221, 52, 83, 26, 10, 2, 2, 2, 2, 2, 2, 2, 2]), // Data |
| 1040 | ), |
| 1041 | // PID: 23861 |
| 1042 | ( |
| 1043 | 821398481, // Timestamp |
| 1044 | 8687, // SeqN |
| 1045 | false, // Marker |
| 1046 | 60, // Transport CC |
| 1047 | // VP9 header--------+ |
| 1048 | // | |
| 1049 | // +------------------------+ |
| 1050 | Vec::from([170, 221, 53, 16, 27, 56, 20, 0, 0, 0, 0, 0, 0, 0, 0]), // Data |
| 1051 | ), |
| 1052 | // PID: 23861 |
| 1053 | ( |
| 1054 | 821398481, // Timestamp |
| 1055 | 8688, // SeqN |
| 1056 | false, // Marker |
| 1057 | 61, // Transport CC |
| 1058 | // VP9 header--------+ |
| 1059 | // | |
| 1060 | // +--------------------+ |
| 1061 | Vec::from([160, 221, 53, 16, 27, 20, 1, 1, 1, 1, 1, 1, 1, 1]), // Data |
| 1062 | ), |
| 1063 | // PID: 23861 |
| 1064 | ( |
| 1065 | 821398481, |
| 1066 | 8689, |
| 1067 | false, |
| 1068 | 62, |
| 1069 | // VP9 header--------+ |
| 1070 | // | |
| 1071 | // +--------------------+ |
| 1072 | Vec::from([164, 221, 53, 16, 27, 20, 2, 2, 2, 2, 2, 2, 2, 2]), // Data |
| 1073 | ), |
| 1074 | // PID: 23861 |
| 1075 | ( |
| 1076 | 821398481, // Timestamp |
| 1077 | 8690, // SeqN |
| 1078 | false, // Marker |
| 1079 | 63, // Transport CC |
| 1080 | // VP9 header--------+ |
| 1081 | // | |
| 1082 | // +--------------------+ |
| 1083 | Vec::from([169, 221, 53, 19, 27, 20, 3, 3, 3, 3, 3, 3, 3, 3]), // Data |
| 1084 | ), |
| 1085 | // PID: 23861 |
| 1086 | ( |
| 1087 | 821398481, // Timestamp |
| 1088 | 8691, // SeqN |
| 1089 | false, // Marker |
| 1090 | 64, // Transport CC |
| 1091 | // VP9 header--------+ |
| 1092 | // | |
| 1093 | // +--------------------+ |
| 1094 | Vec::from([161, 221, 53, 19, 27, 20, 4, 4, 4, 4, 4, 4, 4, 4]), // Data |
| 1095 | ), |
| 1096 | // PID: 23861 |
| 1097 | ( |
| 1098 | 821398481, // Timestamp |
| 1099 | 8692, // SeqN |
| 1100 | false, // Marker |
| 1101 | 65, // Transport CC |
| 1102 | // VP9 header--------+ |
| 1103 | // | |
| 1104 | // +--------------------+ |
| 1105 | Vec::from([161, 221, 53, 19, 27, 20, 5, 5, 5, 5, 5, 5, 5, 5]), // Data |
| 1106 | ), |
| 1107 | // PID: 23861 |
| 1108 | ( |
| 1109 | 821398481, // Timestamp |
| 1110 | 8693, // SeqN |
| 1111 | false, // Marker |
| 1112 | 66, // Transport CC |
| 1113 | // VP9 header--------+ |
| 1114 | // | |
| 1115 | // +--------------------+ |
| 1116 | Vec::from([161, 221, 53, 19, 27, 20, 6, 6, 6, 6, 6, 6, 6, 6]), // Data |
| 1117 | ), |
| 1118 | // PID: 23861 |
| 1119 | ( |
| 1120 | 821398481, // Timestamp |
| 1121 | 8694, // SeqN |
| 1122 | true, // Marker |
| 1123 | 67, // Transport CC |
| 1124 | // VP9 header--------+ |
| 1125 | // | |
| 1126 | // +--------------------+ |
| 1127 | Vec::from([165, 221, 53, 19, 27, 20, 7, 7, 7, 7, 7, 7, 7, 7]), // Data |
| 1128 | ), |
| 1129 | ]; |
| 1130 | |
| 1131 | let mut buffer = |
| 1132 | DepacketizingBuffer::new(CodecDepacketizer::Vp9(Vp9Depacketizer::default()), 30); |
| 1133 | |
| 1134 | for input in &inputs { |
| 1135 | let (meta, data) = construct_input(input.clone()); |
| 1136 | buffer.push(meta, data); |
| 1137 | } |
| 1138 | |
| 1139 | let res0before = buffer.pop().unwrap().unwrap(); // Pop PID: 23860, `contiguous_seq == true`. |
| 1140 | let res1before = buffer.pop().unwrap().unwrap(); // Pop PID: 23861, `contiguous_seq == true`. |
| 1141 | |
| 1142 | let mut buffer = |
| 1143 | DepacketizingBuffer::new(CodecDepacketizer::Vp9(Vp9Depacketizer::default()), 30); |
| 1144 | |
| 1145 | for input in &inputs { |
| 1146 | let (meta, data) = construct_input(input.clone()); |
| 1147 | if meta.seq_no == SeqNo::from(8689) { |
| 1148 | continue; // Skip RTP packet with seq_num=8689 vp9_payload=[20, 2, 2, 2, 2, 2, 2, 2, 2]. |
| 1149 | } |
| 1150 | buffer.push(meta.clone(), data.clone()); |
| 1151 | } |
| 1152 | |
| 1153 | // Pop PID: 23860, `contiguous_seq == true`. |
| 1154 | let res0after = buffer.pop().unwrap().unwrap(); |
| 1155 | // Try to pop PID: 23861. `None` because `contiguous_seq == false` -- no seq_num=8689. |
| 1156 | assert!(buffer.pop().is_none()); |
| 1157 | assert!(buffer.pop().is_none()); // Ensure once again. |
| 1158 | |
| 1159 | for input in &inputs { |
| 1160 | let (meta, data) = construct_input(input.clone()); |
| 1161 | if meta.seq_no == SeqNo::from(8689) { |
| 1162 | // Send RTP packet with seq_num=8689 vp9_payload=[20, 2, 2, 2, 2, 2, 2, 2, 2]. |
| 1163 | buffer.push(meta.clone(), data.clone()); |
| 1164 | break; |
| 1165 | } |
| 1166 | } |
| 1167 | |
| 1168 | let res1after = buffer.pop().unwrap().unwrap(); |
| 1169 | |
| 1170 | assert_eq!(res0before.data, res0after.data); |
| 1171 | assert_eq!(res1before.data, res1after.data); |
| 1172 | } |
| 1173 | } |