1 files changed, 54 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_h265_common.h b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_h265_common.h
new file mode 100644
index 0000000000..8655a02001
--- /dev/null
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_h265_common.h
@@ -0,0 +1,54 @@
+/*
+ *  Copyright (c) 2024 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 MODULES_RTP_RTCP_SOURCE_RTP_PACKET_H265_COMMON_H_
+#define MODULES_RTP_RTCP_SOURCE_RTP_PACKET_H265_COMMON_H_
+
+#include <string>
+#include <vector>
+
+namespace webrtc {
+// The payload header consists of the same
+// fields (F, Type, LayerId and TID) as the NAL unit header. Refer to
+// section 4.4 in RFC 7798.
+constexpr size_t kH265PayloadHeaderSizeBytes = 2;
+// Unlike H.264, H.265 NAL header is 2-bytes.
+constexpr size_t kH265NalHeaderSizeBytes = 2;
+// H.265's FU is constructed of 2-byte payload header, 1-byte FU header and FU
+// payload.
+constexpr size_t kH265FuHeaderSizeBytes = 1;
+// The NALU size for H.265 RTP aggregated packet indicates the size of the NAL
+// unit is 2-bytes.
+constexpr size_t kH265LengthFieldSizeBytes = 2;
+constexpr size_t kH265ApHeaderSizeBytes =
+    kH265NalHeaderSizeBytes + kH265LengthFieldSizeBytes;
+
+// Bit masks for NAL headers.
+enum NalHdrMasks {
+  kH265FBit = 0x80,
+  kH265TypeMask = 0x7E,
+  kH265LayerIDHMask = 0x1,
+  kH265LayerIDLMask = 0xF8,
+  kH265TIDMask = 0x7,
+  kH265TypeMaskN = 0x81,
+  kH265TypeMaskInFuHeader = 0x3F
+};
+
+// Bit masks for FU headers.
+enum FuBitmasks {
+  kH265SBitMask = 0x80,
+  kH265EBitMask = 0x40,
+  kH265FuTypeBitMask = 0x3F
+};
+
+constexpr uint8_t kStartCode[] = {0, 0, 0, 1};
+
+}  // namespace webrtc
+
+#endif  // MODULES_RTP_RTCP_SOURCE_RTP_PACKET_H265_COMMON_H_