Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 67 insertions, 0 deletions

diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/flexfec_header_reader_writer.h b/third_party/libwebrtc/modules/rtp_rtcp/source/flexfec_header_reader_writer.h
new file mode 100644
index 0000000000..81103821e7
--- /dev/null
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/flexfec_header_reader_writer.h
@@ -0,0 +1,67 @@
+/*
+ *  Copyright (c) 2023 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_FLEXFEC_HEADER_READER_WRITER_H_
+#define MODULES_RTP_RTCP_SOURCE_FLEXFEC_HEADER_READER_WRITER_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "modules/rtp_rtcp/source/forward_error_correction.h"
+
+namespace webrtc {
+
+// FlexFEC header in flexible mode (R=0, F=0), minimum 12 bytes.
+// https://datatracker.ietf.org/doc/html/rfc8627#section-4.2.2.1
+//
+//     0                   1                   2                   3
+//     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+//    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+//  0 |0|0|P|X|  CC   |M| PT recovery |        length recovery        |
+//    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+//  4 |                          TS recovery                          |
+//    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+//  8 |           SN base_i           |k|          Mask [0-14]        |
+//    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// 12 |k|                   Mask [15-45] (optional)                   |
+//    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// 16 |                     Mask [46-109] (optional)                  |
+// 20 |                                                               |
+//    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+//    |   ... next SN base and Mask for CSRC_i in CSRC list ...       |
+//
+
+class FlexfecHeaderReader : public FecHeaderReader {
+ public:
+  FlexfecHeaderReader();
+  ~FlexfecHeaderReader() override;
+
+  bool ReadFecHeader(
+      ForwardErrorCorrection::ReceivedFecPacket* fec_packet) const override;
+};
+
+class FlexfecHeaderWriter : public FecHeaderWriter {
+ public:
+  FlexfecHeaderWriter();
+  ~FlexfecHeaderWriter() override;
+
+  size_t MinPacketMaskSize(const uint8_t* packet_mask,
+                           size_t packet_mask_size) const override;
+
+  size_t FecHeaderSize(size_t packet_mask_row_size) const override;
+
+  void FinalizeFecHeader(
+      rtc::ArrayView<const ProtectedStream> protected_streams,
+      ForwardErrorCorrection::Packet& fec_packet) const override;
+};
+
+}  // namespace webrtc
+
+#endif  // MODULES_RTP_RTCP_SOURCE_FLEXFEC_HEADER_READER_WRITER_H_