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/*
* Copyright (c) 2016 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_RTCP_PACKET_COMMON_HEADER_H_
#define MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_COMMON_HEADER_H_
#include <stddef.h>
#include <stdint.h>
namespace webrtc {
namespace rtcp {
class CommonHeader {
public:
static constexpr size_t kHeaderSizeBytes = 4;
CommonHeader() {}
CommonHeader(const CommonHeader&) = default;
CommonHeader& operator=(const CommonHeader&) = default;
bool Parse(const uint8_t* buffer, size_t size_bytes);
uint8_t type() const { return packet_type_; }
// Depending on packet type same header field can be used either as count or
// as feedback message type (fmt). Caller expected to know how it is used.
uint8_t fmt() const { return count_or_format_; }
uint8_t count() const { return count_or_format_; }
size_t payload_size_bytes() const { return payload_size_; }
const uint8_t* payload() const { return payload_; }
size_t packet_size() const {
return kHeaderSizeBytes + payload_size_ + padding_size_;
}
// Returns pointer to the next RTCP packet in compound packet.
const uint8_t* NextPacket() const {
return payload_ + payload_size_ + padding_size_;
}
private:
uint8_t packet_type_ = 0;
uint8_t count_or_format_ = 0;
uint8_t padding_size_ = 0;
uint32_t payload_size_ = 0;
const uint8_t* payload_ = nullptr;
};
} // namespace rtcp
} // namespace webrtc
#endif // MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_COMMON_HEADER_H_
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