File
Blob: firmware/vendor/str0m/src/rtp/vla.rs
| 1 | use std::collections::VecDeque; |
| 2 | |
| 3 | use super::{ExtensionSerializer, ExtensionValues}; |
| 4 | |
| 5 | #[allow(dead_code)] |
| 6 | /// URI for the Video Layers Allocation RTP Header Extension |
| 7 | pub const URI: &str = "http://www.webrtc.org/experiments/rtp-hdrext/video-layers-allocation00"; |
| 8 | |
| 9 | /// Top-level "allocation" for the Video Layers Allocation RTP Header Extension |
| 10 | /// Contains allocations for many simulcast streams, which contain many spatial layers. |
| 11 | /// In practice, there are either many simulcast streams with 1 spatial layer each (simulcast) |
| 12 | /// or 1 simulcast stream with many spatial layers (SVC) |
| 13 | /// or 1 simulcast stream with 1 spatial layer (only temporal layers used). |
| 14 | /// But theoretically, you could have 5 simulcast streams with 4 spatial layers each. |
| 15 | #[derive(Debug, Clone, Eq, PartialEq)] |
| 16 | pub struct VideoLayersAllocation { |
| 17 | /// The index of the current simulcast stream. |
| 18 | /// AKA RTP stream index |
| 19 | /// Set to 0 when everything is inactive (the special case of the header extension being just 0). |
| 20 | /// Erroneously called "RID" in the spec. |
| 21 | pub current_simulcast_stream_index: u8, |
| 22 | |
| 23 | /// AKA RTP streams |
| 24 | /// Max size of this Vec: 5 |
| 25 | pub simulcast_streams: Vec<SimulcastStreamAllocation>, |
| 26 | } |
| 27 | |
| 28 | /// An allocation for a simulcast stream, which may contain up to 4 allocations for spatial layers. |
| 29 | /// There may be up to 5 of these per top-level allocation. |
| 30 | #[derive(Debug, Clone, Eq, PartialEq)] |
| 31 | pub struct SimulcastStreamAllocation { |
| 32 | /// May contains many spatial layers, or none. |
| 33 | /// Max size of this Vec: 4 |
| 34 | pub spatial_layers: Vec<SpatialLayerAllocation>, |
| 35 | } |
| 36 | |
| 37 | /// An allocation for a spatial layer, which may contain up to 5 allocations for temporal layers. |
| 38 | /// There may be up to 4 per simulcast stream. |
| 39 | /// Also contains an optional resolution and framerate. |
| 40 | #[derive(Debug, Clone, Eq, PartialEq)] |
| 41 | pub struct SpatialLayerAllocation { |
| 42 | /// Contains many temporal layers, or none. |
| 43 | /// If empty, the spatial layer is not active. |
| 44 | /// Max size of this Vec: 5 |
| 45 | pub temporal_layers: Vec<TemporalLayerAllocation>, |
| 46 | /// Contains an optional resolution and framerate |
| 47 | pub resolution_and_framerate: Option<ResolutionAndFramerate>, |
| 48 | } |
| 49 | |
| 50 | /// An allocation for a temporal layer. There may be up to 5 per spatial layer. |
| 51 | #[derive(Debug, Clone, Eq, PartialEq)] |
| 52 | pub struct TemporalLayerAllocation { |
| 53 | /// Cumulative bitrate for this temporal layer and all below it within a spatial layer. |
| 54 | pub cumulative_kbps: u64, |
| 55 | } |
| 56 | |
| 57 | /// A resolution and a frame rate, tied together because that's how it's formed in |
| 58 | /// the header extension. Either they are both there or neither are there. |
| 59 | #[derive(Debug, Clone, Eq, PartialEq)] |
| 60 | pub struct ResolutionAndFramerate { |
| 61 | /// Width in number of pixels |
| 62 | pub width: u16, |
| 63 | /// Height in number of pixels |
| 64 | pub height: u16, |
| 65 | /// Framerate in frames per second |
| 66 | pub framerate: u8, |
| 67 | } |
| 68 | |
| 69 | impl VideoLayersAllocation { |
| 70 | #[allow(dead_code)] |
| 71 | fn parse(buf: &[u8]) -> Option<Self> { |
| 72 | // First byte |
| 73 | let (&b0, after_b0) = buf.split_first()?; |
| 74 | if b0 == 0u8 && after_b0.is_empty() { |
| 75 | // Special case when everything is inactive. |
| 76 | return Some(VideoLayersAllocation { |
| 77 | current_simulcast_stream_index: 0, |
| 78 | simulcast_streams: vec![], |
| 79 | }); |
| 80 | } |
| 81 | let current_simulcast_stream_index = read_bits(b0, 0..2); |
| 82 | // Maximum of 5 simulcast streams |
| 83 | let simulcast_stream_count = read_bits(b0, 2..4) + 1; |
| 84 | let shared_spatial_layer_bitmask = read_bits(b0, 4..8); |
| 85 | |
| 86 | // Spatial layer bitmasks, which can be either "shared" or not. |
| 87 | // If shared, each simulcast stream as the same spatial layers active. |
| 88 | // If not, each simulcast stream has its own 4 bits indicating which spatial layers are active. |
| 89 | // So, a maximum of 4 spatial layers per simulcast stream. |
| 90 | let (spatial_layer_active_bits, after_spatial_layer_bitmasks) = |
| 91 | if shared_spatial_layer_bitmask > 0 { |
| 92 | let shared_spatial_layer_active_bits = |
| 93 | read_lower_4bits_ignoring_leading_zeros(shared_spatial_layer_bitmask); |
| 94 | let spatial_layer_active_bits = |
| 95 | vec![shared_spatial_layer_active_bits; simulcast_stream_count as usize]; |
| 96 | let after_spatial_layer_bitmasks = after_b0; |
| 97 | (spatial_layer_active_bits, after_spatial_layer_bitmasks) |
| 98 | } else { |
| 99 | // 4 bits per simulcast stream |
| 100 | let (spatial_layer_bitmasks, after_spatial_layer_bitmasks) = |
| 101 | split_at(after_b0, div_round_up(simulcast_stream_count as usize, 2))?; |
| 102 | let spatial_layer_actives = spatial_layer_bitmasks |
| 103 | .iter() |
| 104 | .flat_map(|&byte| split_byte_in2(byte)) |
| 105 | .take(simulcast_stream_count as usize) |
| 106 | .map(read_lower_4bits_ignoring_leading_zeros) |
| 107 | .collect(); |
| 108 | (spatial_layer_actives, after_spatial_layer_bitmasks) |
| 109 | }; |
| 110 | // The number of active bits that are set across all simulcast streams, |
| 111 | // which is the number of active spatial layers across all simulcast streams. |
| 112 | // A maximum of 5x4 = 20 spatial layers across all simulcast streams. |
| 113 | let total_active_spatial_layer_count = spatial_layer_active_bits |
| 114 | .iter() |
| 115 | .flatten() |
| 116 | .filter(|&&active| active) |
| 117 | .count(); |
| 118 | |
| 119 | // Temporal layer counts |
| 120 | // 2 bits per spatial layer |
| 121 | // A maximum of 5 temporal layers per spatial layer. |
| 122 | // For a maximum of 5x4x5 = 100 temporal layers across all spatial layers |
| 123 | // across all simulcast streams. |
| 124 | let (temporal_layer_counts, after_temporal_layer_counts) = split_at( |
| 125 | after_spatial_layer_bitmasks, |
| 126 | div_round_up(total_active_spatial_layer_count, 4), |
| 127 | )?; |
| 128 | // Max size of this VecDeque: 20 |
| 129 | let mut temporal_layer_counts: VecDeque<u8> = temporal_layer_counts |
| 130 | .iter() |
| 131 | .flat_map(|&byte| split_byte_in4(byte)) |
| 132 | .map(|count_minus_1| count_minus_1 + 1) |
| 133 | .take(total_active_spatial_layer_count) |
| 134 | .collect(); |
| 135 | let total_temporal_layer_count = temporal_layer_counts.iter().sum(); |
| 136 | |
| 137 | // Temporal layer bitrates |
| 138 | let mut next_temporal_layer_bitrate = after_temporal_layer_counts; |
| 139 | // Max size of this VecDeque: 100 |
| 140 | let mut temporal_layer_cumulative_bitrates: VecDeque<u64> = (0..total_temporal_layer_count) |
| 141 | .map(|_temporal_layer_index| { |
| 142 | let (bitrate, after_temporal_layer_bitrate) = |
| 143 | parse_leb_u63(next_temporal_layer_bitrate); |
| 144 | next_temporal_layer_bitrate = after_temporal_layer_bitrate; |
| 145 | bitrate |
| 146 | }) |
| 147 | .collect(); |
| 148 | // libwebrtc fails to parse at a value of 1_000_000 kbps. We are a little more forgiving, |
| 149 | // but since we limit the LEB parse at 63 bits, we should be at least that strict. |
| 150 | if temporal_layer_cumulative_bitrates |
| 151 | .iter() |
| 152 | .any(|&kbps| kbps > (1u64 << 63)) |
| 153 | { |
| 154 | return None; |
| 155 | } |
| 156 | |
| 157 | // (Optional) resolutions and framerates |
| 158 | let mut next_resolution_and_framerate = next_temporal_layer_bitrate; |
| 159 | let mut resolutions_and_framerates = |
| 160 | (0..total_active_spatial_layer_count).filter_map(|_| { |
| 161 | let (resolution_and_framerate, after_resolution_and_framerate) = |
| 162 | split_at(next_resolution_and_framerate, 5)?; |
| 163 | next_resolution_and_framerate = after_resolution_and_framerate; |
| 164 | Some(ResolutionAndFramerate { |
| 165 | width: u16::from_be_bytes(resolution_and_framerate[0..2].try_into().unwrap()) |
| 166 | + 1, |
| 167 | height: u16::from_be_bytes(resolution_and_framerate[2..4].try_into().unwrap()) |
| 168 | + 1, |
| 169 | framerate: resolution_and_framerate[4], |
| 170 | }) |
| 171 | }); |
| 172 | |
| 173 | let simulcast_streams = spatial_layer_active_bits |
| 174 | .into_iter() |
| 175 | .map(|spatial_layer_actives| { |
| 176 | let spatial_layers = spatial_layer_actives |
| 177 | .into_iter() |
| 178 | .filter_map(|spatial_layer_active| { |
| 179 | let (temporal_layers, resolution_and_framerate) = if spatial_layer_active { |
| 180 | let temporal_layer_count = temporal_layer_counts.pop_front()?; |
| 181 | let temporal_layers = (0..temporal_layer_count) |
| 182 | .filter_map(|_temporal_layer_index| { |
| 183 | Some(TemporalLayerAllocation { |
| 184 | cumulative_kbps: temporal_layer_cumulative_bitrates |
| 185 | .pop_front()?, |
| 186 | }) |
| 187 | }) |
| 188 | .collect(); |
| 189 | let resolution_and_framerate = resolutions_and_framerates.next(); |
| 190 | (temporal_layers, resolution_and_framerate) |
| 191 | } else { |
| 192 | (vec![], None) |
| 193 | }; |
| 194 | Some(SpatialLayerAllocation { |
| 195 | temporal_layers, |
| 196 | resolution_and_framerate, |
| 197 | }) |
| 198 | }) |
| 199 | .collect(); |
| 200 | SimulcastStreamAllocation { spatial_layers } |
| 201 | }) |
| 202 | .collect(); |
| 203 | Some(VideoLayersAllocation { |
| 204 | current_simulcast_stream_index, |
| 205 | simulcast_streams, |
| 206 | }) |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | /// Serializer of the Video Layers Allocation Header Extension |
| 211 | #[derive(Debug)] |
| 212 | pub struct Serializer; |
| 213 | |
| 214 | impl ExtensionSerializer for Serializer { |
| 215 | // +-+-+-+-+-+-+-+-+ |
| 216 | // |RID| NS| sl_bm | |
| 217 | // +-+-+-+-+-+-+-+-+ |
| 218 | // Spatial layer bitmask |sl0_bm |sl1_bm | |
| 219 | // up to 2 bytes |---------------| |
| 220 | // when sl_bm == 0 |sl2_bm |sl3_bm | |
| 221 | // +-+-+-+-+-+-+-+-+ |
| 222 | // Number of temporal layers |#tl|#tl|#tl|#tl| |
| 223 | // per spatial layer | | | | | |
| 224 | // +-+-+-+-+-+-+-+-+ |
| 225 | // Target bitrate in kpbs | | |
| 226 | // per temporal layer : ... : |
| 227 | // leb128 encoded | | |
| 228 | // +-+-+-+-+-+-+-+-+ |
| 229 | // Resolution and framerate | | |
| 230 | // 5 bytes per spatial layer + width-1 for + |
| 231 | // (optional) | rid=0, sid=0 | |
| 232 | // +---------------+ |
| 233 | // | | |
| 234 | // + height-1 for + |
| 235 | // | rid=0, sid=0 | |
| 236 | // +---------------+ |
| 237 | // | max framerate | |
| 238 | // +-+-+-+-+-+-+-+-+ |
| 239 | // : ... : |
| 240 | // +-+-+-+-+-+-+-+-+ |
| 241 | |
| 242 | fn write_to(&self, buf: &mut [u8], ev: &ExtensionValues) -> usize { |
| 243 | if let Some(vla) = ev.user_values.get::<VideoLayersAllocation>() { |
| 244 | let mut index = 0; |
| 245 | |
| 246 | buf[index] = 0; |
| 247 | |
| 248 | if vla.current_simulcast_stream_index == 0 && vla.simulcast_streams.is_empty() { |
| 249 | return index + 1; |
| 250 | } |
| 251 | |
| 252 | // RID: RTP stream index this allocation is sent on, numbered from 0. 2 bits. |
| 253 | buf[index] |= (vla.current_simulcast_stream_index & 0b11) << 6; |
| 254 | // NS: Number of RTP streams minus one. 2 bits, thus allowing up-to 4 RTP streams. |
| 255 | buf[index] |= ((vla.simulcast_streams.len() - 1) as u8 & 0b11) << 4; |
| 256 | |
| 257 | // sl_bm: BitMask of the active Spatial Layers when same for all RTP streams or 0 otherwise. |
| 258 | // 4 bits, thus allows up to 4 spatial layers per RTP streams. |
| 259 | let total_spatial_layers = vla.simulcast_streams.len(); |
| 260 | let spatial_layers = vla.simulcast_streams.iter().enumerate().fold( |
| 261 | [0u8; 4], |
| 262 | |mut spatial_layers, (stream_index, stream)| { |
| 263 | let sl_bm = stream.spatial_layers.iter().enumerate().fold( |
| 264 | 0u8, |
| 265 | |is_active, (layer_id, l)| { |
| 266 | is_active | if l.temporal_layers.is_empty() { 0 } else { 1 } << layer_id |
| 267 | }, |
| 268 | ); |
| 269 | |
| 270 | spatial_layers[stream_index] = sl_bm; |
| 271 | spatial_layers |
| 272 | }, |
| 273 | ); |
| 274 | |
| 275 | let shared_spatial_layer_bitmask = spatial_layers[..total_spatial_layers] |
| 276 | .iter() |
| 277 | .all(|i| *i == spatial_layers[0]); |
| 278 | |
| 279 | if shared_spatial_layer_bitmask { |
| 280 | buf[index] |= spatial_layers[0] & 0b1111; |
| 281 | } else { |
| 282 | // slX_bm: BitMask of the active Spatial Layers for RTP stream with index=X. |
| 283 | // When NS < 2, takes one byte, otherwise uses two bytes. Zero-padded to byte alignment. |
| 284 | for (stream_index, sl_bm) in |
| 285 | spatial_layers[..total_spatial_layers].iter().enumerate() |
| 286 | { |
| 287 | let shift = if stream_index % 2 == 0 { 4 } else { 0 }; |
| 288 | if shift == 4 { |
| 289 | index += 1; |
| 290 | buf[index] = 0; |
| 291 | } |
| 292 | buf[index + (stream_index / 2)] |= (sl_bm & 0b1111) << shift; |
| 293 | } |
| 294 | |
| 295 | // When writing 1 or 3 entries, skip the remaining nibble to be byte aligned |
| 296 | if total_spatial_layers % 2 != 0 { |
| 297 | buf[index] |= 0b1111; |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | index += 1; |
| 302 | |
| 303 | // #tl: 2-bit value of number of temporal layers-1, thus allowing up-to 4 temporal layers. |
| 304 | // Values are stored in ascending order of spatial id. Zero-padded to byte alignment. |
| 305 | let mut tl_index = 0; |
| 306 | let mut wrote_temporal_layer_count = false; |
| 307 | for s in &vla.simulcast_streams { |
| 308 | for spatial in &s.spatial_layers { |
| 309 | if !spatial.temporal_layers.is_empty() { |
| 310 | wrote_temporal_layer_count = true; |
| 311 | let temporal_layer_count_minus_one = |
| 312 | (spatial.temporal_layers.len() - 1) as u8; |
| 313 | if tl_index % 4 == 0 { |
| 314 | if tl_index > 0 { |
| 315 | index += 1; |
| 316 | } |
| 317 | buf[index] = 0; |
| 318 | } |
| 319 | |
| 320 | buf[index] |= temporal_layer_count_minus_one << (6 - (tl_index % 4) * 2); |
| 321 | tl_index += 1; |
| 322 | } |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | if wrote_temporal_layer_count { |
| 327 | index += 1; |
| 328 | } else { |
| 329 | buf[index] = 0; |
| 330 | index += 1; |
| 331 | return index; |
| 332 | } |
| 333 | |
| 334 | for s in &vla.simulcast_streams { |
| 335 | for spatial in &s.spatial_layers { |
| 336 | for temporal in &spatial.temporal_layers { |
| 337 | index += encode_leb_u63(temporal.cumulative_kbps, &mut buf[index..]); |
| 338 | } |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | for s in &vla.simulcast_streams { |
| 343 | for spatial in &s.spatial_layers { |
| 344 | if let Some(r) = &spatial.resolution_and_framerate { |
| 345 | let width = (r.width - 1).to_be_bytes(); |
| 346 | let height = (r.height - 1).to_be_bytes(); |
| 347 | let framerate = r.framerate; |
| 348 | buf[index..index + 2].copy_from_slice(&width[..]); |
| 349 | index += 2; |
| 350 | buf[index..index + 2].copy_from_slice(&height[..]); |
| 351 | index += 2; |
| 352 | buf[index] = framerate; |
| 353 | index += 1; |
| 354 | } |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | return index; |
| 359 | } |
| 360 | 0 |
| 361 | } |
| 362 | |
| 363 | fn parse_value(&self, buf: &[u8], ev: &mut ExtensionValues) -> bool { |
| 364 | let Some(vla) = VideoLayersAllocation::parse(buf) else { |
| 365 | return false; |
| 366 | }; |
| 367 | ev.user_values.set(vla); |
| 368 | true |
| 369 | } |
| 370 | |
| 371 | fn is_video(&self) -> bool { |
| 372 | true |
| 373 | } |
| 374 | |
| 375 | fn is_audio(&self) -> bool { |
| 376 | false |
| 377 | } |
| 378 | |
| 379 | fn requires_two_byte_form(&self, _ev: &ExtensionValues) -> bool { |
| 380 | true |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | // See https://en.wikipedia.org/wiki/LEB128 |
| 385 | // Reads out at most 9 bytes (63 bits) unsigned |
| 386 | // returns (value, rest) |
| 387 | // libwebrtc reads out all 64 bits, but then fails the parse if the value |
| 388 | // is over 1_000_000 anyway, so reading 63 bits should be enough as long as |
| 389 | // we throw away the parse if it's above 1_000_000. |
| 390 | #[allow(dead_code)] |
| 391 | fn parse_leb_u63(bytes: &[u8]) -> (u64, &[u8]) { |
| 392 | let mut result = 0; |
| 393 | for (index, &byte) in bytes.iter().enumerate() { |
| 394 | let is_last = !read_bit(byte, 0); |
| 395 | let chunk = read_bits(byte, 1..8); |
| 396 | result |= (chunk as u64) << (7 * index); |
| 397 | if is_last || index == 8 { |
| 398 | return (result, &bytes[(index + 1)..]); |
| 399 | } |
| 400 | } |
| 401 | (0, bytes) |
| 402 | } |
| 403 | |
| 404 | /// Encodes leb128 |
| 405 | pub fn encode_leb_u63(mut value: u64, buf: &mut [u8]) -> usize { |
| 406 | let mut index = 0; |
| 407 | loop { |
| 408 | if value < 0x80 { |
| 409 | buf[index] = value as u8; |
| 410 | index += 1; |
| 411 | break; |
| 412 | } else { |
| 413 | buf[index] = ((value & 0x7f) | 0x80) as u8; |
| 414 | value >>= 7; |
| 415 | index += 1; |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | index |
| 420 | } |
| 421 | |
| 422 | // If successful, the size of the left will be mid, |
| 423 | // and the size of the right while be buf.len()-mid. |
| 424 | #[allow(dead_code)] |
| 425 | fn split_at(buf: &[u8], mid: usize) -> Option<(&[u8], &[u8])> { |
| 426 | if mid > buf.len() { |
| 427 | return None; |
| 428 | } |
| 429 | Some(buf.split_at(mid)) |
| 430 | } |
| 431 | |
| 432 | #[allow(dead_code)] |
| 433 | fn div_round_up(top: usize, bottom: usize) -> usize { |
| 434 | if top == 0 { |
| 435 | 0 |
| 436 | } else { |
| 437 | ((top - 1) / bottom) + 1 |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | // Into 2 chunks of 4 bits |
| 442 | #[allow(dead_code)] |
| 443 | fn split_byte_in2(byte: u8) -> [u8; 2] { |
| 444 | [read_bits(byte, 0..4), read_bits(byte, 4..8)] |
| 445 | } |
| 446 | |
| 447 | // Into 4 chunks of 2 bits |
| 448 | #[allow(dead_code)] |
| 449 | fn split_byte_in4(byte: u8) -> [u8; 4] { |
| 450 | [ |
| 451 | read_bits(byte, 0..2), |
| 452 | read_bits(byte, 2..4), |
| 453 | read_bits(byte, 4..6), |
| 454 | read_bits(byte, 6..8), |
| 455 | ] |
| 456 | } |
| 457 | |
| 458 | // Ignore top 4 bits and leading zeros. Then split into a Vec<bool>ca |
| 459 | fn read_lower_4bits_ignoring_leading_zeros(bits: u8) -> Vec<bool> { |
| 460 | let mut count = 0; |
| 461 | let mut bools: Vec<bool> = (0..=3u8) |
| 462 | .map(|index| { |
| 463 | let bit = read_bit(bits, 7 - index); |
| 464 | if bit { |
| 465 | count = index + 1; |
| 466 | } |
| 467 | bit |
| 468 | }) |
| 469 | .collect(); |
| 470 | bools.truncate(count as usize); |
| 471 | bools |
| 472 | } |
| 473 | |
| 474 | #[allow(dead_code)] |
| 475 | fn read_bit(bits: u8, index: u8) -> bool { |
| 476 | read_bits(bits, index..(index + 1)) > 0 |
| 477 | } |
| 478 | |
| 479 | #[allow(dead_code)] |
| 480 | fn read_bits(bits: u8, range: std::ops::Range<u8>) -> u8 { |
| 481 | assert!(range.end <= 8); |
| 482 | (bits >> (8 - range.end)) & (0b1111_1111 >> (8 - range.len())) |
| 483 | } |
| 484 | |
| 485 | #[cfg(test)] |
| 486 | mod test { |
| 487 | use super::*; |
| 488 | |
| 489 | fn serialize(vla: Option<&VideoLayersAllocation>) -> Vec<u8> { |
| 490 | let Some(vla) = vla else { return Vec::new() }; |
| 491 | let mut buf: [u8; 100] = [0u8; 100]; |
| 492 | let mut ext_values: ExtensionValues = Default::default(); |
| 493 | ext_values.user_values.set(vla.clone()); |
| 494 | |
| 495 | let actual_size = Serializer {}.write_to(&mut buf, &ext_values); |
| 496 | |
| 497 | buf[..actual_size].to_vec() |
| 498 | } |
| 499 | |
| 500 | fn assert_ser_deser(bytes: &[u8], vla: Option<VideoLayersAllocation>) { |
| 501 | let vla_deserialized = VideoLayersAllocation::parse(bytes); |
| 502 | let vla_serialized = serialize(vla.as_ref()); |
| 503 | |
| 504 | assert_eq!(vla, vla_deserialized); |
| 505 | assert_eq!(bytes, vla_serialized); |
| 506 | } |
| 507 | |
| 508 | #[test] |
| 509 | fn test_read_bits() { |
| 510 | assert_eq!(read_bits(0b1100_0000, 0..2), 0b0000_0011); |
| 511 | assert_eq!(read_bits(0b1001_0101, 0..2), 0b0000_0010); |
| 512 | assert_eq!(read_bits(0b0110_1010, 0..2), 0b0000_0001); |
| 513 | assert_eq!(read_bits(0b0011_1111, 0..2), 0b0000_0000); |
| 514 | assert_eq!(read_bits(0b0011_0000, 2..4), 0b0000_0011); |
| 515 | assert_eq!(read_bits(0b0110_0101, 2..4), 0b0000_0010); |
| 516 | assert_eq!(read_bits(0b1001_1010, 2..4), 0b0000_0001); |
| 517 | assert_eq!(read_bits(0b1100_1111, 2..4), 0b0000_0000); |
| 518 | } |
| 519 | |
| 520 | #[test] |
| 521 | fn test_parse_leb_u63() { |
| 522 | let (value, rest) = parse_leb_u63(&[0b0000_0000, 5]); |
| 523 | assert_eq!(0, value); |
| 524 | assert_eq!(&[5], rest); |
| 525 | |
| 526 | let (value, rest) = parse_leb_u63(&[0b0000_0001, 5]); |
| 527 | assert_eq!(1, value); |
| 528 | assert_eq!(&[5], rest); |
| 529 | |
| 530 | let (value, rest) = parse_leb_u63(&[0b1000_0000, 0b0000_0001, 5]); |
| 531 | assert_eq!(128, value); |
| 532 | assert_eq!(&[5], rest); |
| 533 | |
| 534 | let (value, rest) = parse_leb_u63(&[0b1000_0000, 0b1000_0000, 0b0000_0001, 5]); |
| 535 | assert_eq!(16384, value); |
| 536 | assert_eq!(&[5], rest); |
| 537 | |
| 538 | let (value, rest) = parse_leb_u63(&[0b1000_0000, 0b1000_0000, 0b1000_0000, 0b0000_0001, 5]); |
| 539 | assert_eq!(2097152, value); |
| 540 | assert_eq!(&[5], rest); |
| 541 | |
| 542 | let (value, rest) = parse_leb_u63(&[ |
| 543 | 0b1000_0000, |
| 544 | 0b1000_0000, |
| 545 | 0b1000_0000, |
| 546 | 0b1000_0000, |
| 547 | 0b1000_0000, |
| 548 | 0b1000_0000, |
| 549 | 0b1000_0000, |
| 550 | 0b1000_0000, |
| 551 | 0b0000_0001, |
| 552 | 5, |
| 553 | ]); |
| 554 | assert_eq!(72057594037927936, value); |
| 555 | assert_eq!(&[5], rest); |
| 556 | |
| 557 | // Too many bytes, so stop early. |
| 558 | let (value, rest) = parse_leb_u63(&[ |
| 559 | 0b1000_0000, |
| 560 | 0b1000_0000, |
| 561 | 0b1000_0000, |
| 562 | 0b1000_0000, |
| 563 | 0b1000_0000, |
| 564 | 0b1000_0000, |
| 565 | 0b1000_0000, |
| 566 | 0b1000_0000, |
| 567 | 0b1000_0001, |
| 568 | 5, |
| 569 | ]); |
| 570 | assert_eq!(72057594037927936, value); |
| 571 | assert_eq!(&[5], rest); |
| 572 | } |
| 573 | |
| 574 | #[test] |
| 575 | fn test_parse_vla_empty_buffer() { |
| 576 | assert_ser_deser(&[], None); |
| 577 | } |
| 578 | |
| 579 | #[test] |
| 580 | fn test_parse_vla_empty() { |
| 581 | assert_ser_deser( |
| 582 | &[0b0000_0000], |
| 583 | Some(VideoLayersAllocation { |
| 584 | current_simulcast_stream_index: 0, |
| 585 | simulcast_streams: vec![], |
| 586 | }), |
| 587 | ); |
| 588 | } |
| 589 | |
| 590 | #[test] |
| 591 | fn test_res() { |
| 592 | let vla = VideoLayersAllocation::parse(&[ |
| 593 | 17, 111, 7, 0, 15, 92, 4, 255, 2, 207, 30, 7, 127, 4, 55, 30, |
| 594 | ]); |
| 595 | assert!(vla.is_some()) |
| 596 | } |
| 597 | |
| 598 | #[test] |
| 599 | fn test_parse_vla_missing_spatial_layer_bitmasks() { |
| 600 | assert_eq!(VideoLayersAllocation::parse(&[0b0110_0000]), None); |
| 601 | } |
| 602 | |
| 603 | #[test] |
| 604 | fn test_parse_vla_1_simulcast_stream_with_no_active_layers() { |
| 605 | assert_ser_deser( |
| 606 | &[ |
| 607 | 0b0100_0000, |
| 608 | // 1 bitmask |
| 609 | 0b0000_0000, |
| 610 | ], |
| 611 | Some(VideoLayersAllocation { |
| 612 | current_simulcast_stream_index: 1, |
| 613 | simulcast_streams: vec![SimulcastStreamAllocation { |
| 614 | spatial_layers: vec![], |
| 615 | }], |
| 616 | }), |
| 617 | ); |
| 618 | } |
| 619 | |
| 620 | #[test] |
| 621 | fn test_parse_vla_3_simulcast_streams_with_no_active_layers() { |
| 622 | assert_eq!( |
| 623 | VideoLayersAllocation::parse(&[ |
| 624 | 0b0110_0000, |
| 625 | // 3 active spatial layer bitmasks, 4 bits each |
| 626 | 0b0000_0000, |
| 627 | 0b0000_1111, |
| 628 | ]), |
| 629 | Some(VideoLayersAllocation { |
| 630 | current_simulcast_stream_index: 1, |
| 631 | simulcast_streams: vec![ |
| 632 | SimulcastStreamAllocation { |
| 633 | spatial_layers: vec![], |
| 634 | }, |
| 635 | SimulcastStreamAllocation { |
| 636 | spatial_layers: vec![], |
| 637 | }, |
| 638 | SimulcastStreamAllocation { |
| 639 | spatial_layers: vec![], |
| 640 | }, |
| 641 | ], |
| 642 | }), |
| 643 | ); |
| 644 | } |
| 645 | |
| 646 | #[test] |
| 647 | fn test_parse_vla_3_simulcast_streams_with_1_active_spatial_layers_and_2_temporal_layers() { |
| 648 | assert_ser_deser( |
| 649 | &[ |
| 650 | 0b0110_0001, |
| 651 | // 3 temporal layer counts (minus 1), 2 bits each |
| 652 | 0b0101_0100, |
| 653 | // 6 temporal layer bitrates |
| 654 | 0b0000_0001, |
| 655 | 0b0000_0010, |
| 656 | 0b0000_0100, |
| 657 | 0b0000_1000, |
| 658 | 0b0001_0000, |
| 659 | 0b0010_0000, |
| 660 | ], |
| 661 | Some(VideoLayersAllocation { |
| 662 | current_simulcast_stream_index: 1, |
| 663 | simulcast_streams: vec![ |
| 664 | SimulcastStreamAllocation { |
| 665 | spatial_layers: vec![SpatialLayerAllocation { |
| 666 | temporal_layers: vec![ |
| 667 | TemporalLayerAllocation { cumulative_kbps: 1 }, |
| 668 | TemporalLayerAllocation { cumulative_kbps: 2 }, |
| 669 | ], |
| 670 | resolution_and_framerate: None, |
| 671 | }], |
| 672 | }, |
| 673 | SimulcastStreamAllocation { |
| 674 | spatial_layers: vec![SpatialLayerAllocation { |
| 675 | temporal_layers: vec![ |
| 676 | TemporalLayerAllocation { cumulative_kbps: 4 }, |
| 677 | TemporalLayerAllocation { cumulative_kbps: 8 }, |
| 678 | ], |
| 679 | resolution_and_framerate: None, |
| 680 | }], |
| 681 | }, |
| 682 | SimulcastStreamAllocation { |
| 683 | spatial_layers: vec![SpatialLayerAllocation { |
| 684 | temporal_layers: vec![ |
| 685 | TemporalLayerAllocation { |
| 686 | cumulative_kbps: 16, |
| 687 | }, |
| 688 | TemporalLayerAllocation { |
| 689 | cumulative_kbps: 32, |
| 690 | }, |
| 691 | ], |
| 692 | resolution_and_framerate: None, |
| 693 | }], |
| 694 | }, |
| 695 | ], |
| 696 | }), |
| 697 | ); |
| 698 | } |
| 699 | |
| 700 | #[test] |
| 701 | fn test_parse_vla_3_sim_1_spatial_2_temporal_with_resolutions() { |
| 702 | assert_ser_deser( |
| 703 | &[ |
| 704 | 0b0110_0001, |
| 705 | // 3 temporal layer counts (minus 1), 2 bits each |
| 706 | 0b0101_0100, |
| 707 | // 6 temporal layer bitrates |
| 708 | 100, |
| 709 | 101, |
| 710 | 110, |
| 711 | 111, |
| 712 | 120, |
| 713 | 121, |
| 714 | // 3 resolutions + framerates (5 bytes each) |
| 715 | // 320x180x15 |
| 716 | 1, |
| 717 | 63, |
| 718 | 0, |
| 719 | 179, |
| 720 | 15, |
| 721 | // 640x360x30 |
| 722 | 2, |
| 723 | 127, |
| 724 | 1, |
| 725 | 103, |
| 726 | 30, |
| 727 | // 1280x720x60 |
| 728 | 4, |
| 729 | 255, |
| 730 | 2, |
| 731 | 207, |
| 732 | 60, |
| 733 | ], |
| 734 | Some(VideoLayersAllocation { |
| 735 | current_simulcast_stream_index: 1, |
| 736 | simulcast_streams: vec![ |
| 737 | SimulcastStreamAllocation { |
| 738 | spatial_layers: vec![SpatialLayerAllocation { |
| 739 | temporal_layers: vec![ |
| 740 | TemporalLayerAllocation { |
| 741 | cumulative_kbps: 100, |
| 742 | }, |
| 743 | TemporalLayerAllocation { |
| 744 | cumulative_kbps: 101, |
| 745 | }, |
| 746 | ], |
| 747 | resolution_and_framerate: Some(ResolutionAndFramerate { |
| 748 | width: 320, |
| 749 | height: 180, |
| 750 | framerate: 15, |
| 751 | }), |
| 752 | }], |
| 753 | }, |
| 754 | SimulcastStreamAllocation { |
| 755 | spatial_layers: vec![SpatialLayerAllocation { |
| 756 | temporal_layers: vec![ |
| 757 | TemporalLayerAllocation { |
| 758 | cumulative_kbps: 110, |
| 759 | }, |
| 760 | TemporalLayerAllocation { |
| 761 | cumulative_kbps: 111, |
| 762 | }, |
| 763 | ], |
| 764 | resolution_and_framerate: Some(ResolutionAndFramerate { |
| 765 | width: 640, |
| 766 | height: 360, |
| 767 | framerate: 30, |
| 768 | }), |
| 769 | }], |
| 770 | }, |
| 771 | SimulcastStreamAllocation { |
| 772 | spatial_layers: vec![SpatialLayerAllocation { |
| 773 | temporal_layers: vec![ |
| 774 | TemporalLayerAllocation { |
| 775 | cumulative_kbps: 120, |
| 776 | }, |
| 777 | TemporalLayerAllocation { |
| 778 | cumulative_kbps: 121, |
| 779 | }, |
| 780 | ], |
| 781 | resolution_and_framerate: Some(ResolutionAndFramerate { |
| 782 | width: 1280, |
| 783 | height: 720, |
| 784 | framerate: 60, |
| 785 | }), |
| 786 | }], |
| 787 | }, |
| 788 | ], |
| 789 | }), |
| 790 | ); |
| 791 | } |
| 792 | |
| 793 | #[test] |
| 794 | fn test_parse_vla_3_simulcast_streams_with_differing_active_spatial_layers_with_resolutions() { |
| 795 | assert_ser_deser( |
| 796 | &[ |
| 797 | 0b0010_0000, |
| 798 | // 3 active spatial layer bitmasks, 4 bits each; only the base layer is active |
| 799 | 0b0001_0000, |
| 800 | 0b0000_1111, |
| 801 | // 1 temporal layer counts (minus 1), 2 bits each |
| 802 | 0b0100_0000, |
| 803 | // 2 temporal layer bitrates |
| 804 | 100, |
| 805 | 101, |
| 806 | // 1 resolutions + framerates (5 bytes) |
| 807 | // 320x180x15 |
| 808 | 1, |
| 809 | 63, |
| 810 | 0, |
| 811 | 179, |
| 812 | 15, |
| 813 | ], |
| 814 | Some(VideoLayersAllocation { |
| 815 | current_simulcast_stream_index: 0, |
| 816 | simulcast_streams: vec![ |
| 817 | SimulcastStreamAllocation { |
| 818 | spatial_layers: vec![SpatialLayerAllocation { |
| 819 | temporal_layers: vec![ |
| 820 | TemporalLayerAllocation { |
| 821 | cumulative_kbps: 100, |
| 822 | }, |
| 823 | TemporalLayerAllocation { |
| 824 | cumulative_kbps: 101, |
| 825 | }, |
| 826 | ], |
| 827 | resolution_and_framerate: Some(ResolutionAndFramerate { |
| 828 | width: 320, |
| 829 | height: 180, |
| 830 | framerate: 15, |
| 831 | }), |
| 832 | }], |
| 833 | }, |
| 834 | SimulcastStreamAllocation { |
| 835 | spatial_layers: vec![], |
| 836 | }, |
| 837 | SimulcastStreamAllocation { |
| 838 | spatial_layers: vec![], |
| 839 | }, |
| 840 | ], |
| 841 | }), |
| 842 | ); |
| 843 | } |
| 844 | |
| 845 | #[test] |
| 846 | fn test_parse_vla_1_simulcast_streams_with_3_spatial_layers() { |
| 847 | assert_ser_deser( |
| 848 | &[ |
| 849 | 0b0000_0111, |
| 850 | // 3 temporal layer counts (minus 1), 2 bits each |
| 851 | 0b0101_0100, |
| 852 | // 6 temporal layer bitrates |
| 853 | 100, |
| 854 | 101, |
| 855 | 110, |
| 856 | 111, |
| 857 | 120, |
| 858 | 121, |
| 859 | ], |
| 860 | Some(VideoLayersAllocation { |
| 861 | current_simulcast_stream_index: 0, |
| 862 | simulcast_streams: vec![SimulcastStreamAllocation { |
| 863 | spatial_layers: vec![ |
| 864 | SpatialLayerAllocation { |
| 865 | temporal_layers: vec![ |
| 866 | TemporalLayerAllocation { |
| 867 | cumulative_kbps: 100, |
| 868 | }, |
| 869 | TemporalLayerAllocation { |
| 870 | cumulative_kbps: 101, |
| 871 | }, |
| 872 | ], |
| 873 | resolution_and_framerate: None, |
| 874 | }, |
| 875 | SpatialLayerAllocation { |
| 876 | temporal_layers: vec![ |
| 877 | TemporalLayerAllocation { |
| 878 | cumulative_kbps: 110, |
| 879 | }, |
| 880 | TemporalLayerAllocation { |
| 881 | cumulative_kbps: 111, |
| 882 | }, |
| 883 | ], |
| 884 | resolution_and_framerate: None, |
| 885 | }, |
| 886 | SpatialLayerAllocation { |
| 887 | temporal_layers: vec![ |
| 888 | TemporalLayerAllocation { |
| 889 | cumulative_kbps: 120, |
| 890 | }, |
| 891 | TemporalLayerAllocation { |
| 892 | cumulative_kbps: 121, |
| 893 | }, |
| 894 | ], |
| 895 | resolution_and_framerate: None, |
| 896 | }, |
| 897 | ], |
| 898 | }], |
| 899 | }), |
| 900 | ); |
| 901 | } |
| 902 | |
| 903 | #[test] |
| 904 | fn test_parse_vla_4_simulcast_streams_with_1_spatial_layer_each() { |
| 905 | assert_ser_deser( |
| 906 | &[ |
| 907 | 0b0011_0001, |
| 908 | // 4 temporal layer counts (minus 1), 2 bits each: all have 2 temporal layers |
| 909 | 0b0101_0101, |
| 910 | // 8 temporal layer bitrates |
| 911 | // 100, 101, 110, 111 are single-byte LEB128 |
| 912 | 100, |
| 913 | 101, |
| 914 | 110, |
| 915 | 111, |
| 916 | // 130 = LEB128 [0x82, 0x01], 131 = LEB128 [0x83, 0x01] |
| 917 | 0x82, |
| 918 | 0x01, |
| 919 | 0x83, |
| 920 | 0x01, |
| 921 | // 200 = LEB128 [0xC8, 0x01], 201 = LEB128 [0xC9, 0x01] |
| 922 | 0xC8, |
| 923 | 0x01, |
| 924 | 0xC9, |
| 925 | 0x01, |
| 926 | ], |
| 927 | Some(VideoLayersAllocation { |
| 928 | current_simulcast_stream_index: 0, |
| 929 | simulcast_streams: vec![ |
| 930 | SimulcastStreamAllocation { |
| 931 | spatial_layers: vec![SpatialLayerAllocation { |
| 932 | temporal_layers: vec![ |
| 933 | TemporalLayerAllocation { |
| 934 | cumulative_kbps: 100, |
| 935 | }, |
| 936 | TemporalLayerAllocation { |
| 937 | cumulative_kbps: 101, |
| 938 | }, |
| 939 | ], |
| 940 | resolution_and_framerate: None, |
| 941 | }], |
| 942 | }, |
| 943 | SimulcastStreamAllocation { |
| 944 | spatial_layers: vec![SpatialLayerAllocation { |
| 945 | temporal_layers: vec![ |
| 946 | TemporalLayerAllocation { |
| 947 | cumulative_kbps: 110, |
| 948 | }, |
| 949 | TemporalLayerAllocation { |
| 950 | cumulative_kbps: 111, |
| 951 | }, |
| 952 | ], |
| 953 | resolution_and_framerate: None, |
| 954 | }], |
| 955 | }, |
| 956 | SimulcastStreamAllocation { |
| 957 | spatial_layers: vec![SpatialLayerAllocation { |
| 958 | temporal_layers: vec![ |
| 959 | TemporalLayerAllocation { |
| 960 | cumulative_kbps: 130, |
| 961 | }, |
| 962 | TemporalLayerAllocation { |
| 963 | cumulative_kbps: 131, |
| 964 | }, |
| 965 | ], |
| 966 | resolution_and_framerate: None, |
| 967 | }], |
| 968 | }, |
| 969 | SimulcastStreamAllocation { |
| 970 | spatial_layers: vec![SpatialLayerAllocation { |
| 971 | temporal_layers: vec![ |
| 972 | TemporalLayerAllocation { |
| 973 | cumulative_kbps: 200, |
| 974 | }, |
| 975 | TemporalLayerAllocation { |
| 976 | cumulative_kbps: 201, |
| 977 | }, |
| 978 | ], |
| 979 | resolution_and_framerate: None, |
| 980 | }], |
| 981 | }, |
| 982 | ], |
| 983 | }), |
| 984 | ); |
| 985 | } |
| 986 | |
| 987 | #[test] |
| 988 | fn test_parse_vla_2_simulcast_streams_with_3_spatial_layers_each() { |
| 989 | assert_ser_deser( |
| 990 | &[ |
| 991 | 0b0001_0111, |
| 992 | // 6 temporal layer counts (minus 1), 2 bits each: all have 2 temporal layers |
| 993 | // First byte: 4 counts |
| 994 | 0b0101_0101, |
| 995 | // Second byte: 2 counts + zero padding |
| 996 | 0b0101_0000, |
| 997 | // 12 temporal layer bitrates |
| 998 | // Stream 1: 100, 101, 110, 111, 120, 121 are single-byte LEB128 |
| 999 | 100, |
| 1000 | 101, |
| 1001 | 110, |
| 1002 | 111, |
| 1003 | 120, |
| 1004 | 121, |
| 1005 | // Stream 2: values >= 128, each needs 2-byte LEB128 |
| 1006 | // 200 = [0xC8, 0x01], 201 = [0xC9, 0x01] |
| 1007 | 0xC8, |
| 1008 | 0x01, |
| 1009 | 0xC9, |
| 1010 | 0x01, |
| 1011 | // 210 = [0xD2, 0x01], 211 = [0xD3, 0x01] |
| 1012 | 0xD2, |
| 1013 | 0x01, |
| 1014 | 0xD3, |
| 1015 | 0x01, |
| 1016 | // 220 = [0xDC, 0x01], 221 = [0xDD, 0x01] |
| 1017 | 0xDC, |
| 1018 | 0x01, |
| 1019 | 0xDD, |
| 1020 | 0x01, |
| 1021 | ], |
| 1022 | Some(VideoLayersAllocation { |
| 1023 | current_simulcast_stream_index: 0, |
| 1024 | simulcast_streams: vec![ |
| 1025 | SimulcastStreamAllocation { |
| 1026 | spatial_layers: vec![ |
| 1027 | SpatialLayerAllocation { |
| 1028 | temporal_layers: vec![ |
| 1029 | TemporalLayerAllocation { |
| 1030 | cumulative_kbps: 100, |
| 1031 | }, |
| 1032 | TemporalLayerAllocation { |
| 1033 | cumulative_kbps: 101, |
| 1034 | }, |
| 1035 | ], |
| 1036 | resolution_and_framerate: None, |
| 1037 | }, |
| 1038 | SpatialLayerAllocation { |
| 1039 | temporal_layers: vec![ |
| 1040 | TemporalLayerAllocation { |
| 1041 | cumulative_kbps: 110, |
| 1042 | }, |
| 1043 | TemporalLayerAllocation { |
| 1044 | cumulative_kbps: 111, |
| 1045 | }, |
| 1046 | ], |
| 1047 | resolution_and_framerate: None, |
| 1048 | }, |
| 1049 | SpatialLayerAllocation { |
| 1050 | temporal_layers: vec![ |
| 1051 | TemporalLayerAllocation { |
| 1052 | cumulative_kbps: 120, |
| 1053 | }, |
| 1054 | TemporalLayerAllocation { |
| 1055 | cumulative_kbps: 121, |
| 1056 | }, |
| 1057 | ], |
| 1058 | resolution_and_framerate: None, |
| 1059 | }, |
| 1060 | ], |
| 1061 | }, |
| 1062 | SimulcastStreamAllocation { |
| 1063 | spatial_layers: vec![ |
| 1064 | SpatialLayerAllocation { |
| 1065 | temporal_layers: vec![ |
| 1066 | TemporalLayerAllocation { |
| 1067 | cumulative_kbps: 200, |
| 1068 | }, |
| 1069 | TemporalLayerAllocation { |
| 1070 | cumulative_kbps: 201, |
| 1071 | }, |
| 1072 | ], |
| 1073 | resolution_and_framerate: None, |
| 1074 | }, |
| 1075 | SpatialLayerAllocation { |
| 1076 | temporal_layers: vec![ |
| 1077 | TemporalLayerAllocation { |
| 1078 | cumulative_kbps: 210, |
| 1079 | }, |
| 1080 | TemporalLayerAllocation { |
| 1081 | cumulative_kbps: 211, |
| 1082 | }, |
| 1083 | ], |
| 1084 | resolution_and_framerate: None, |
| 1085 | }, |
| 1086 | SpatialLayerAllocation { |
| 1087 | temporal_layers: vec![ |
| 1088 | TemporalLayerAllocation { |
| 1089 | cumulative_kbps: 220, |
| 1090 | }, |
| 1091 | TemporalLayerAllocation { |
| 1092 | cumulative_kbps: 221, |
| 1093 | }, |
| 1094 | ], |
| 1095 | resolution_and_framerate: None, |
| 1096 | }, |
| 1097 | ], |
| 1098 | }, |
| 1099 | ], |
| 1100 | }), |
| 1101 | ); |
| 1102 | } |
| 1103 | |
| 1104 | #[test] |
| 1105 | fn test_parse_vla_1_simulcast_streams_with_4_spatial_layers_1_inactive() { |
| 1106 | assert_ser_deser( |
| 1107 | &[ |
| 1108 | 0b0000_1011, |
| 1109 | // 3 temporal layer counts (minus 1), 2 bits each |
| 1110 | 0b0101_0100, |
| 1111 | // 6 temporal layer bitrates |
| 1112 | 100, |
| 1113 | 101, |
| 1114 | 110, |
| 1115 | 111, |
| 1116 | 120, |
| 1117 | 121, |
| 1118 | ], |
| 1119 | Some(VideoLayersAllocation { |
| 1120 | current_simulcast_stream_index: 0, |
| 1121 | simulcast_streams: vec![SimulcastStreamAllocation { |
| 1122 | spatial_layers: vec![ |
| 1123 | SpatialLayerAllocation { |
| 1124 | temporal_layers: vec![ |
| 1125 | TemporalLayerAllocation { |
| 1126 | cumulative_kbps: 100, |
| 1127 | }, |
| 1128 | TemporalLayerAllocation { |
| 1129 | cumulative_kbps: 101, |
| 1130 | }, |
| 1131 | ], |
| 1132 | resolution_and_framerate: None, |
| 1133 | }, |
| 1134 | SpatialLayerAllocation { |
| 1135 | temporal_layers: vec![ |
| 1136 | TemporalLayerAllocation { |
| 1137 | cumulative_kbps: 110, |
| 1138 | }, |
| 1139 | TemporalLayerAllocation { |
| 1140 | cumulative_kbps: 111, |
| 1141 | }, |
| 1142 | ], |
| 1143 | resolution_and_framerate: None, |
| 1144 | }, |
| 1145 | SpatialLayerAllocation { |
| 1146 | temporal_layers: vec![], |
| 1147 | resolution_and_framerate: None, |
| 1148 | }, |
| 1149 | SpatialLayerAllocation { |
| 1150 | temporal_layers: vec![ |
| 1151 | TemporalLayerAllocation { |
| 1152 | cumulative_kbps: 120, |
| 1153 | }, |
| 1154 | TemporalLayerAllocation { |
| 1155 | cumulative_kbps: 121, |
| 1156 | }, |
| 1157 | ], |
| 1158 | resolution_and_framerate: None, |
| 1159 | }, |
| 1160 | ], |
| 1161 | }], |
| 1162 | }), |
| 1163 | ); |
| 1164 | } |
| 1165 | } |