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/*
* Copyright (c) 2015 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 WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_DLRR_H_
#define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_DLRR_H_
#include <vector>
#include "webrtc/base/basictypes.h"
namespace webrtc {
namespace rtcp {
// DLRR Report Block: Delay since the Last Receiver Report (RFC 3611).
class Dlrr {
public:
struct SubBlock {
// RFC 3611 4.5
uint32_t ssrc;
uint32_t last_rr;
uint32_t delay_since_last_rr;
};
static const uint8_t kBlockType = 5;
static const size_t kMaxNumberOfDlrrItems = 100;
Dlrr() {}
Dlrr(const Dlrr& other) = default;
~Dlrr() {}
Dlrr& operator=(const Dlrr& other) = default;
// Second parameter is value read from block header,
// i.e. size of block in 32bits excluding block header itself.
bool Parse(const uint8_t* buffer, uint16_t block_length_32bits);
size_t BlockLength() const;
// Fills buffer with the Dlrr.
// Consumes BlockLength() bytes.
void Create(uint8_t* buffer) const;
// Max 100 DLRR Items can be added per DLRR report block.
bool WithDlrrItem(uint32_t ssrc, uint32_t last_rr, uint32_t delay_last_rr);
const std::vector<SubBlock>& sub_blocks() const { return sub_blocks_; }
private:
static const size_t kBlockHeaderLength = 4;
static const size_t kSubBlockLength = 12;
std::vector<SubBlock> sub_blocks_;
};
} // namespace rtcp
} // namespace webrtc
#endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_DLRR_H_
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