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diff --git a/dom/media/platforms/agnostic/bytestreams/ByteStreamsUtils.h b/dom/media/platforms/agnostic/bytestreams/ByteStreamsUtils.h
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+++ b/dom/media/platforms/agnostic/bytestreams/ByteStreamsUtils.h
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef DOM_MEDIA_PLATFORMS_AGNOSTIC_BYTESTREAMS_BYTESTREAMUTILS_H_
+#define DOM_MEDIA_PLATFORMS_AGNOSTIC_BYTESTREAMS_BYTESTREAMUTILS_H_
+
+namespace mozilla {
+
+// Described in ISO 23001-8:2016
+// H264 spec Table 2, H265 spec Table E.3
+enum class PrimaryID : uint8_t {
+  INVALID = 0,
+  BT709 = 1,
+  UNSPECIFIED = 2,
+  BT470M = 4,
+  BT470BG = 5,
+  SMPTE170M = 6,
+  SMPTE240M = 7,
+  FILM = 8,
+  BT2020 = 9,
+  SMPTEST428_1 = 10,
+  SMPTEST431_2 = 11,
+  SMPTEST432_1 = 12,
+  EBU_3213_E = 22
+};
+
+// H264 spec Table 3,  H265 spec Table E.4
+enum class TransferID : uint8_t {
+  INVALID = 0,
+  BT709 = 1,
+  UNSPECIFIED = 2,
+  GAMMA22 = 4,
+  GAMMA28 = 5,
+  SMPTE170M = 6,
+  SMPTE240M = 7,
+  LINEAR = 8,
+  LOG = 9,
+  LOG_SQRT = 10,
+  IEC61966_2_4 = 11,
+  BT1361_ECG = 12,
+  IEC61966_2_1 = 13,
+  BT2020_10 = 14,
+  BT2020_12 = 15,
+  SMPTEST2084 = 16,
+  SMPTEST428_1 = 17,
+
+  // Not yet standardized
+  ARIB_STD_B67 = 18,  // AKA hybrid-log gamma, HLG.
+};
+
+// H264 spec Table 4,  H265 spec Table E.5
+enum class MatrixID : uint8_t {
+  RGB = 0,
+  BT709 = 1,
+  UNSPECIFIED = 2,
+  FCC = 4,
+  BT470BG = 5,
+  SMPTE170M = 6,
+  SMPTE240M = 7,
+  YCOCG = 8,
+  BT2020_NCL = 9,
+  BT2020_CL = 10,
+  YDZDX = 11,
+  INVALID = 255,
+};
+
+}  // namespace mozilla
+
+#endif  // DOM_MEDIA_PLATFORMS_AGNOSTIC_BYTESTREAMS_H265_H_