1 files changed, 111 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/video_codecs/scalability_mode.h b/third_party/libwebrtc/api/video_codecs/scalability_mode.h
new file mode 100644
index 0000000000..b26f32eb22
--- /dev/null
+++ b/third_party/libwebrtc/api/video_codecs/scalability_mode.h
@@ -0,0 +1,111 @@
+/*
+ *  Copyright (c) 2022 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef API_VIDEO_CODECS_SCALABILITY_MODE_H_
+#define API_VIDEO_CODECS_SCALABILITY_MODE_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "absl/strings/string_view.h"
+#include "rtc_base/system/rtc_export.h"
+
+namespace webrtc {
+
+// Supported scalability modes. Most applications should use the
+// PeerConnection-level apis where scalability mode is represented as a string.
+// This list of currently recognized modes is intended for the api boundary
+// between webrtc and injected encoders. Any application usage outside of
+// injected encoders is strongly discouraged.
+enum class ScalabilityMode : uint8_t {
+  kL1T1,
+  kL1T2,
+  kL1T3,
+  kL2T1,
+  kL2T1h,
+  kL2T1_KEY,
+  kL2T2,
+  kL2T2h,
+  kL2T2_KEY,
+  kL2T2_KEY_SHIFT,
+  kL2T3,
+  kL2T3h,
+  kL2T3_KEY,
+  kL3T1,
+  kL3T1h,
+  kL3T1_KEY,
+  kL3T2,
+  kL3T2h,
+  kL3T2_KEY,
+  kL3T3,
+  kL3T3h,
+  kL3T3_KEY,
+  kS2T1,
+  kS2T1h,
+  kS2T2,
+  kS2T2h,
+  kS2T3,
+  kS2T3h,
+  kS3T1,
+  kS3T1h,
+  kS3T2,
+  kS3T2h,
+  kS3T3,
+  kS3T3h,
+};
+
+inline constexpr ScalabilityMode kAllScalabilityModes[] = {
+    // clang-format off
+    ScalabilityMode::kL1T1,
+    ScalabilityMode::kL1T2,
+    ScalabilityMode::kL1T3,
+    ScalabilityMode::kL2T1,
+    ScalabilityMode::kL2T1h,
+    ScalabilityMode::kL2T1_KEY,
+    ScalabilityMode::kL2T2,
+    ScalabilityMode::kL2T2h,
+    ScalabilityMode::kL2T2_KEY,
+    ScalabilityMode::kL2T2_KEY_SHIFT,
+    ScalabilityMode::kL2T3,
+    ScalabilityMode::kL2T3h,
+    ScalabilityMode::kL2T3_KEY,
+    ScalabilityMode::kL3T1,
+    ScalabilityMode::kL3T1h,
+    ScalabilityMode::kL3T1_KEY,
+    ScalabilityMode::kL3T2,
+    ScalabilityMode::kL3T2h,
+    ScalabilityMode::kL3T2_KEY,
+    ScalabilityMode::kL3T3,
+    ScalabilityMode::kL3T3h,
+    ScalabilityMode::kL3T3_KEY,
+    ScalabilityMode::kS2T1,
+    ScalabilityMode::kS2T1h,
+    ScalabilityMode::kS2T2,
+    ScalabilityMode::kS2T2h,
+    ScalabilityMode::kS2T3,
+    ScalabilityMode::kS2T3h,
+    ScalabilityMode::kS3T1,
+    ScalabilityMode::kS3T1h,
+    ScalabilityMode::kS3T2,
+    ScalabilityMode::kS3T2h,
+    ScalabilityMode::kS3T3,
+    ScalabilityMode::kS3T3h,
+    // clang-format on
+};
+
+inline constexpr size_t kScalabilityModeCount =
+    sizeof(kAllScalabilityModes) / sizeof(ScalabilityMode);
+
+RTC_EXPORT
+absl::string_view ScalabilityModeToString(ScalabilityMode scalability_mode);
+
+}  // namespace webrtc
+
+#endif  // API_VIDEO_CODECS_SCALABILITY_MODE_H_