File: leb128.h

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/*
 *  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_LEB128_H_
#define MODULES_RTP_RTCP_SOURCE_LEB128_H_

#include <cstdint>

namespace webrtc {

// Returns number of bytes needed to store `value` in leb128 format.
int Leb128Size(uint64_t value);

// Reads leb128 encoded value and advance read_at by number of bytes consumed.
// Sets read_at to nullptr on error.
uint64_t ReadLeb128(const uint8_t*& read_at, const uint8_t* end);

// Encodes `value` in leb128 format. Assumes buffer has size of at least
// Leb128Size(value). Returns number of bytes consumed.
int WriteLeb128(uint64_t value, uint8_t* buffer);

}  // namespace webrtc

#endif  // MODULES_RTP_RTCP_SOURCE_LEB128_H_