Per Kjellander | 6556ed2 | 2020-10-05 11:51:47 | [diff] [blame] | 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_ |