video_layers_allocation.h (2804B)
1 /* 2 * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef API_VIDEO_VIDEO_LAYERS_ALLOCATION_H_ 12 #define API_VIDEO_VIDEO_LAYERS_ALLOCATION_H_ 13 14 #include <cstdint> 15 16 #include "absl/container/inlined_vector.h" 17 #include "api/units/data_rate.h" 18 19 namespace webrtc { 20 21 // This struct contains additional stream-level information needed by a 22 // Selective Forwarding Middlebox to make relay decisions of RTP streams. 23 struct VideoLayersAllocation { 24 static constexpr int kMaxSpatialIds = 4; 25 static constexpr int kMaxTemporalIds = 4; 26 27 friend bool operator==(const VideoLayersAllocation& lhs, 28 const VideoLayersAllocation& rhs) { 29 return lhs.rtp_stream_index == rhs.rtp_stream_index && 30 lhs.resolution_and_frame_rate_is_valid == 31 rhs.resolution_and_frame_rate_is_valid && 32 lhs.active_spatial_layers == rhs.active_spatial_layers; 33 } 34 35 friend bool operator!=(const VideoLayersAllocation& lhs, 36 const VideoLayersAllocation& rhs) { 37 return !(lhs == rhs); 38 } 39 40 struct SpatialLayer { 41 friend bool operator==(const SpatialLayer& lhs, const SpatialLayer& rhs) { 42 return lhs.rtp_stream_index == rhs.rtp_stream_index && 43 lhs.spatial_id == rhs.spatial_id && 44 lhs.target_bitrate_per_temporal_layer == 45 rhs.target_bitrate_per_temporal_layer && 46 lhs.width == rhs.width && lhs.height == rhs.height && 47 lhs.frame_rate_fps == rhs.frame_rate_fps; 48 } 49 50 friend bool operator!=(const SpatialLayer& lhs, const SpatialLayer& rhs) { 51 return !(lhs == rhs); 52 } 53 int rtp_stream_index = 0; 54 // Index of the spatial layer per `rtp_stream_index`. 55 int spatial_id = 0; 56 // Target bitrate per decode target. 57 absl::InlinedVector<DataRate, kMaxTemporalIds> 58 target_bitrate_per_temporal_layer; 59 60 // These fields are only valid if `resolution_and_frame_rate_is_valid` is 61 // true 62 uint16_t width = 0; 63 uint16_t height = 0; 64 // Max frame rate used in any temporal layer of this spatial layer. 65 uint8_t frame_rate_fps = 0; 66 }; 67 68 // Index of the rtp stream this allocation is sent on. Used for mapping 69 // a SpatialLayer to a rtp stream. 70 int rtp_stream_index = 0; 71 bool resolution_and_frame_rate_is_valid = false; 72 absl::InlinedVector<SpatialLayer, kMaxSpatialIds> active_spatial_layers; 73 }; 74 75 } // namespace webrtc 76 77 #endif // API_VIDEO_VIDEO_LAYERS_ALLOCATION_H_