1 /* 2 * Copyright (c) 2022 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_CODECS_SCALABILITY_MODE_HELPER_H_ 12 #define API_VIDEO_CODECS_SCALABILITY_MODE_HELPER_H_ 13 14 #include "absl/strings/string_view.h" 15 #include "absl/types/optional.h" 16 17 namespace webrtc { 18 19 // Returns the number of spatial layers from the `scalability_mode_string` 20 // or nullopt if the given mode is unknown. 21 absl::optional<int> ScalabilityModeStringToNumSpatialLayers( 22 absl::string_view scalability_mode_string); 23 24 // Returns the number of temporal layers from the `scalability_mode_string` 25 // or nullopt if the given mode is unknown. 26 absl::optional<int> ScalabilityModeStringToNumTemporalLayers( 27 absl::string_view scalability_mode_string); 28 29 } // namespace webrtc 30 31 #endif // API_VIDEO_CODECS_SCALABILITY_MODE_HELPER_H_ 32