From 46bbf7ec4819012f754ffaa9f12bcea32eae572e Mon Sep 17 00:00:00 2001
From: philipel <philipel@webrtc.org>
Date: Mon, 11 Sep 2023 17:30:26 +0200
Subject: [PATCH] Add `ScalabilityModeStringToEnum` helper function.

Bug: none
Change-Id: Iea602c88afbfe1f8f8e94b353eda96d62b651bd8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/319882
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40732}
---
 api/video_codecs/BUILD.gn                   | 5 ++++-
 api/video_codecs/scalability_mode_helper.cc | 5 +++++
 api/video_codecs/scalability_mode_helper.h  | 6 ++++++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/api/video_codecs/BUILD.gn b/api/video_codecs/BUILD.gn
index d9dd5aea2b..94c9cc8b87 100644
--- a/api/video_codecs/BUILD.gn
+++ b/api/video_codecs/BUILD.gn
@@ -31,7 +31,10 @@ rtc_source_set("scalability_mode_helper") {
     "scalability_mode_helper.cc",
     "scalability_mode_helper.h",
   ]
-  deps = [ "../../modules/video_coding/svc:scalability_mode_util" ]
+  deps = [
+    ":scalability_mode",
+    "../../modules/video_coding/svc:scalability_mode_util",
+  ]
   absl_deps = [
     "//third_party/abseil-cpp/absl/strings",
     "//third_party/abseil-cpp/absl/types:optional",
diff --git a/api/video_codecs/scalability_mode_helper.cc b/api/video_codecs/scalability_mode_helper.cc
index b4571632d9..09ede9c87d 100644
--- a/api/video_codecs/scalability_mode_helper.cc
+++ b/api/video_codecs/scalability_mode_helper.cc
@@ -34,4 +34,9 @@ absl::optional<int> ScalabilityModeStringToNumTemporalLayers(
   return ScalabilityModeToNumTemporalLayers(*scalability_mode);
 }
 
+absl::optional<ScalabilityMode> ScalabilityModeStringToEnum(
+    absl::string_view scalability_mode_string) {
+  return ScalabilityModeFromString(scalability_mode_string);
+}
+
 }  // namespace webrtc
diff --git a/api/video_codecs/scalability_mode_helper.h b/api/video_codecs/scalability_mode_helper.h
index a8b060d079..21dcfc2f30 100644
--- a/api/video_codecs/scalability_mode_helper.h
+++ b/api/video_codecs/scalability_mode_helper.h
@@ -13,6 +13,7 @@
 
 #include "absl/strings/string_view.h"
 #include "absl/types/optional.h"
+#include "api/video_codecs/scalability_mode.h"
 
 namespace webrtc {
 
@@ -26,6 +27,11 @@ absl::optional<int> ScalabilityModeStringToNumSpatialLayers(
 absl::optional<int> ScalabilityModeStringToNumTemporalLayers(
     absl::string_view scalability_mode_string);
 
+// Convert the `scalability_mode_string` to the scalability mode enum value
+// or nullopt if the given mode is unknown.
+absl::optional<ScalabilityMode> ScalabilityModeStringToEnum(
+    absl::string_view scalability_mode_string);
+
 }  // namespace webrtc
 
 #endif  // API_VIDEO_CODECS_SCALABILITY_MODE_HELPER_H_