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51 lines
1.1 KiB
Go
51 lines
1.1 KiB
Go
5 years ago
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// Copyright 2020, Chef. All rights reserved.
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// https://github.com/q191201771/lal
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//
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// Use of this source code is governed by a MIT-style license
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// that can be found in the License file.
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//
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// Author: Chef (191201771@qq.com)
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package rtprtcp
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import "github.com/q191201771/naza/pkg/bele"
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type RR struct {
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senderSSRC uint32
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mediaSSRC uint32
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fraction uint8
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lost uint32
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cycles uint16
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extendedSeq uint32
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jitter uint32
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lsr uint32
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dlsr uint32 // default 0
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}
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func (r *RR) Pack() []byte {
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const lenInWords = 8
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b := make([]byte, lenInWords*4)
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var h RTCPHeader
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h.Version = RTCPVersion
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h.Padding = 0
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h.CountOrFormat = 1
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h.PacketType = RTCPPacketTypeRR
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h.Length = lenInWords - 1
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h.PackTo(b)
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bele.BEPutUint32(b[4:], r.senderSSRC)
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bele.BEPutUint32(b[8:], r.mediaSSRC)
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b[12] = r.fraction
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// TODO chef: lost的表示是否正确
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bele.BEPutUint24(b[13:], r.lost>>8)
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bele.BEPutUint16(b[16:], r.cycles)
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bele.BEPutUint32(b[18:], r.extendedSeq)
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bele.BEPutUint32(b[20:], r.jitter)
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bele.BEPutUint32(b[24:], r.lsr)
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bele.BEPutUint32(b[28:], 0)
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return b
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}
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