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fe24f58c73
This changes the libvpx VP9 encoder to generate the scalability mode based on the current encoding parameters when using layer activation. Tested: Ran with L3T3_KEY reduced to L2T3_KEY and L1T3 due to bandwidth or layer activation. Added unit tests. Bug: webrtc:15892 Change-Id: Iaedca4ea5fc3a692996666ceaf0d6aa03fb058a1 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/344760 Commit-Queue: Evan Shrubsole <eshr@google.com> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#42007}
55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
/*
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* Copyright (c) 2022 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_SCALABILITY_MODE_UTIL_H_
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#define MODULES_VIDEO_CODING_SVC_SCALABILITY_MODE_UTIL_H_
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#include "absl/strings/string_view.h"
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#include "absl/types/optional.h"
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#include "api/video_codecs/scalability_mode.h"
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#include "api/video_codecs/video_codec.h"
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namespace webrtc {
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enum class ScalabilityModeResolutionRatio {
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kTwoToOne, // The resolution ratio between spatial layers is 2:1.
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kThreeToTwo, // The resolution ratio between spatial layers is 1.5:1.
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};
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static constexpr char kDefaultScalabilityModeStr[] = "L1T2";
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absl::optional<ScalabilityMode> MakeScalabilityMode(
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int num_spatial_layers,
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int num_temporal_layers,
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InterLayerPredMode inter_layer_pred,
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absl::optional<ScalabilityModeResolutionRatio> ratio,
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bool shift);
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absl::optional<ScalabilityMode> ScalabilityModeFromString(
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absl::string_view scalability_mode_string);
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InterLayerPredMode ScalabilityModeToInterLayerPredMode(
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ScalabilityMode scalability_mode);
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int ScalabilityModeToNumSpatialLayers(ScalabilityMode scalability_mode);
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int ScalabilityModeToNumTemporalLayers(ScalabilityMode scalability_mode);
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absl::optional<ScalabilityModeResolutionRatio> ScalabilityModeToResolutionRatio(
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ScalabilityMode scalability_mode);
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bool ScalabilityModeIsShiftMode(ScalabilityMode scalability_mode);
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ScalabilityMode LimitNumSpatialLayers(ScalabilityMode scalability_mode,
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int max_spatial_layers);
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} // namespace webrtc
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#endif // MODULES_VIDEO_CODING_SVC_SCALABILITY_MODE_UTIL_H_
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