26146bbce0
SvcRateAllocator assumed no temporal layering for screencast content and allocated all bitrate to base temporal layer. Now it distributes bitrate to spatial and temporal layers (if configured) no matter of content type. Bug: webrtc:351644568, b/364190191 Change-Id: I445f0157d2c14cad033648693dc0564ae97023e9 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/362080 Commit-Queue: Sergey Silkin <ssilkin@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Cr-Commit-Position: refs/heads/main@{#42979}
72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_VIDEO_CODING_SVC_SVC_RATE_ALLOCATOR_H_
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#define MODULES_VIDEO_CODING_SVC_SVC_RATE_ALLOCATOR_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <vector>
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#include "absl/container/inlined_vector.h"
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#include "api/video/video_bitrate_allocation.h"
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#include "api/video/video_bitrate_allocator.h"
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#include "api/video/video_codec_constants.h"
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#include "api/video_codecs/video_codec.h"
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#include "rtc_base/experiments/stable_target_rate_experiment.h"
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namespace webrtc {
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class SvcRateAllocator : public VideoBitrateAllocator {
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public:
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explicit SvcRateAllocator(const VideoCodec& codec);
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VideoBitrateAllocation Allocate(
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VideoBitrateAllocationParameters parameters) override;
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static DataRate GetMaxBitrate(const VideoCodec& codec);
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static DataRate GetPaddingBitrate(const VideoCodec& codec);
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static absl::InlinedVector<DataRate, kMaxSpatialLayers> GetLayerStartBitrates(
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const VideoCodec& codec);
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private:
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struct NumLayers {
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size_t spatial = 1;
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size_t temporal = 1;
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};
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static NumLayers GetNumLayers(const VideoCodec& codec);
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std::vector<DataRate> DistributeAllocationToSpatialLayersNormalVideo(
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DataRate total_bitrate,
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size_t first_active_layer,
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size_t num_spatial_layers) const;
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std::vector<DataRate> DistributeAllocationToSpatialLayersScreenSharing(
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DataRate total_bitrate,
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size_t first_active_layer,
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size_t num_spatial_layers) const;
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// Returns the number of layers that are active and have enough bitrate to
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// actually be enabled.
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size_t FindNumEnabledLayers(DataRate target_rate) const;
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const VideoCodec codec_;
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const NumLayers num_layers_;
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const StableTargetRateExperiment experiment_settings_;
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const absl::InlinedVector<DataRate, kMaxSpatialLayers>
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cumulative_layer_start_bitrates_;
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size_t last_active_layer_count_;
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};
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} // namespace webrtc
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#endif // MODULES_VIDEO_CODING_SVC_SVC_RATE_ALLOCATOR_H_
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