92e677a1f8
BUG=webrtc:5260 R=åsapersson Review URL: https://codereview.webrtc.org/1551893002 Cr-Commit-Position: refs/heads/master@{#11228}
82 lines
2.4 KiB
C++
82 lines
2.4 KiB
C++
/*
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* Copyright (c) 2016 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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*/
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#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_SLI_H_
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#define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_SLI_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/psfb.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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// Slice loss indication (SLI) (RFC 4585).
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class Sli : public Psfb {
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public:
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static const uint8_t kFeedbackMessageType = 2;
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class Macroblocks {
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public:
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static const size_t kLength = 4;
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Macroblocks() : item_(0) {}
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Macroblocks(uint8_t picture_id, uint16_t first, uint16_t number);
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~Macroblocks() {}
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void Parse(const uint8_t* buffer);
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void Create(uint8_t* buffer) const;
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uint16_t first() const { return item_ >> 19; }
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uint16_t number() const { return (item_ >> 6) & 0x1fff; }
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uint8_t picture_id() const { return (item_ & 0x3f); }
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private:
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uint32_t item_;
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};
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Sli() {}
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virtual ~Sli() {}
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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 WithPictureId(uint8_t picture_id,
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uint16_t first_macroblock = 0,
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uint16_t number_macroblocks = 0x1fff) {
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items_.push_back(
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Macroblocks(picture_id, first_macroblock, number_macroblocks));
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}
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const std::vector<Macroblocks>& macroblocks() const { return items_; }
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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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private:
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size_t BlockLength() const override {
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return RtcpPacket::kHeaderLength + Psfb::kCommonFeedbackLength +
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items_.size() * Macroblocks::kLength;
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}
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std::vector<Macroblocks> items_;
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RTC_DISALLOW_COPY_AND_ASSIGN(Sli);
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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_SLI_H_
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