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649648e722
to reuse it for scalable av1 Bug: webrtc:12148 Change-Id: I0d413c5466a2d66df3eea9cdf13687f4ddd1a843 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/191765 Reviewed-by: Philip Eliasson <philipel@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#32560}
69 lines
2.2 KiB
C++
69 lines
2.2 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 "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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VideoBitrateAllocation GetAllocationNormalVideo(
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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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VideoBitrateAllocation GetAllocationScreenSharing(
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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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