c79be57b47
This is a reland of commit 775639e930f14a619974944594b40c633cc574a3 Original change's description: > Set default scalability mode for H.265 to L1T1. > > H.265 does not have software fallback, and it may have issue supporting > more than 1 temporal layers on some devices. Set default to L1T1 when > scalability is not configured, or if a scalability mode is reported as > not supported by encoder. > > Bug: chromium:41480904 > Change-Id: I53895c45ec821d65774ffe2db5f418184e3fb02a > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/367835 > Reviewed-by: Sergey Silkin <ssilkin@webrtc.org> > Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> > Commit-Queue: Jianlin Qiu <jianlin.qiu@intel.com> > Cr-Commit-Position: refs/heads/main@{#43389} Bug: chromium:41480904 Change-Id: Idedf6249130bd01dd31261672c624b88c3f4c1de Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/368261 Reviewed-by: Erik Språng <sprang@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Sergey Silkin <ssilkin@webrtc.org> Commit-Queue: Jianlin Qiu <jianlin.qiu@intel.com> Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org> Cr-Commit-Position: refs/heads/main@{#43412}
61 lines
2.1 KiB
C++
61 lines
2.1 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 <optional>
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#include "absl/strings/string_view.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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// Scalability mode to be used if falling back to default scalability mode is
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// unsupported.
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static constexpr char kNoLayeringScalabilityModeStr[] = "L1T1";
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RTC_EXPORT std::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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std::optional<ScalabilityModeResolutionRatio> ratio,
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bool shift);
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RTC_EXPORT std::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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std::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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