a8890a57a5
Review URL: https://codereview.webrtc.org/1461623003 Cr-Commit-Position: refs/heads/master@{#11111}
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_NACK_H_
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#define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_NACK_H_
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#include <vector>
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#include "webrtc/base/basictypes.h"
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#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h"
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#include "webrtc/modules/rtp_rtcp/source/rtcp_utility.h"
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namespace webrtc {
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namespace rtcp {
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class Nack : public Rtpfb {
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public:
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const uint8_t kFeedbackMessageType = 1;
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Nack() {}
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virtual ~Nack() {}
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// Parse assumes header is already parsed and validated.
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bool Parse(const RTCPUtility::RtcpCommonHeader& header,
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const uint8_t* payload); // Size of the payload is in the header.
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void WithList(const uint16_t* nack_list, size_t length);
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const std::vector<uint16_t>& packet_ids() const { return packet_ids_; }
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protected:
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bool Create(uint8_t* packet,
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size_t* index,
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size_t max_length,
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RtcpPacket::PacketReadyCallback* callback) const override;
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size_t BlockLength() const override;
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private:
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const size_t kNackItemLength = 4;
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struct PackedNack {
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uint16_t first_pid;
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uint16_t bitmask;
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};
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void Pack(); // Fills packed_ using packed_ids_. (used in WithList).
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void Unpack(); // Fills packet_ids_ using packed_. (used in Parse).
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std::vector<PackedNack> packed_;
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std::vector<uint16_t> packet_ids_;
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RTC_DISALLOW_COPY_AND_ASSIGN(Nack);
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};
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} // namespace rtcp
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} // namespace webrtc
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#endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_NACK_H_
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