mirror of
https://github.com/livekit/livekit.git
synced 2026-04-04 08:15:52 +00:00
c09d8d0878
* Split RTPStats into receiver and sender. For receiver, short types are input and need to calculate extended type. For sender (subscriber), it can operate only in extended type. This makes the subscriber side a little simpler and should make it more efficient as it can do simple comparisons in extended type space. There was also an issue with subscriber using shorter type and calculating extended type. When subscriber starts after the publisher has already rolled over in sequence number OR timestamp, when subsequent publisher side sender reports are used to adjust subscriber time stamps, they were out of whack. Using extended type on subscriber does not face that. * fix test * extended types from sequencer * log
269 lines
7.8 KiB
Go
269 lines
7.8 KiB
Go
// Copyright 2023 LiveKit, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sfu
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import (
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"reflect"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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"github.com/livekit/protocol/logger"
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)
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func Test_sequencer(t *testing.T) {
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seq := newSequencer(500, false, logger.GetLogger())
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off := uint16(15)
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for i := uint64(1); i < 518; i++ {
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seq.push(time.Now(), i, i+uint64(off), 123, true, 2, nil, nil)
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}
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// send the last two out-of-order
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seq.push(time.Now(), 519, 519+uint64(off), 123, false, 2, nil, nil)
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seq.push(time.Now(), 518, 518+uint64(off), 123, true, 2, nil, nil)
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req := []uint16{57, 58, 62, 63, 513, 514, 515, 516, 517}
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res := seq.getExtPacketMetas(req)
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// nothing should be returned as not enough time has elapsed since sending packet
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require.Equal(t, 0, len(res))
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time.Sleep((ignoreRetransmission + 10) * time.Millisecond)
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res = seq.getExtPacketMetas(req)
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require.Equal(t, len(req), len(res))
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for i, val := range res {
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require.Equal(t, val.targetSeqNo, req[i])
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require.Equal(t, val.sourceSeqNo, req[i]-off)
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require.Equal(t, val.layer, int8(2))
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require.Equal(t, val.extSequenceNumber, uint64(req[i]))
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require.Equal(t, val.extTimestamp, uint64(123))
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}
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res = seq.getExtPacketMetas(req)
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require.Equal(t, 0, len(res))
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time.Sleep((ignoreRetransmission + 10) * time.Millisecond)
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res = seq.getExtPacketMetas(req)
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require.Equal(t, len(req), len(res))
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for i, val := range res {
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require.Equal(t, val.targetSeqNo, req[i])
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require.Equal(t, val.sourceSeqNo, req[i]-off)
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require.Equal(t, val.layer, int8(2))
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require.Equal(t, val.extSequenceNumber, uint64(req[i]))
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require.Equal(t, val.extTimestamp, uint64(123))
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}
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seq.push(time.Now(), 521, 521+uint64(off), 123, true, 1, nil, nil)
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m := seq.getExtPacketMetas([]uint16{521 + off})
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require.Equal(t, 0, len(m))
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time.Sleep((ignoreRetransmission + 10) * time.Millisecond)
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m = seq.getExtPacketMetas([]uint16{521 + off})
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require.Equal(t, 1, len(m))
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seq.push(time.Now(), 505, 505+uint64(off), 123, false, 1, nil, nil)
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m = seq.getExtPacketMetas([]uint16{505 + off})
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require.Equal(t, 0, len(m))
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time.Sleep((ignoreRetransmission + 10) * time.Millisecond)
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m = seq.getExtPacketMetas([]uint16{505 + off})
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require.Equal(t, 1, len(m))
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}
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func Test_sequencer_getNACKSeqNo_exclusion(t *testing.T) {
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type args struct {
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seqNo []uint16
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}
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type input struct {
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seqNo uint64
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isPadding bool
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}
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type fields struct {
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inputs []input
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offset uint64
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markerOdd bool
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markerEven bool
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codecBytesOdd []byte
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codecBytesEven []byte
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ddBytesOdd []byte
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ddBytesEven []byte
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}
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tests := []struct {
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name string
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fields fields
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args args
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want []uint16
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}{
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{
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name: "Should get correct seq numbers",
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fields: fields{
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inputs: []input{
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{65526, false},
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{65524, false},
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{65525, false},
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{65529, false},
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{65530, false},
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{65531, true},
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{65533, false},
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{65532, true},
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{65534, false},
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},
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offset: 5,
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markerOdd: true,
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markerEven: false,
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codecBytesOdd: []byte{1, 2, 3, 4},
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codecBytesEven: []byte{5, 6, 7},
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ddBytesOdd: []byte{8, 9, 10},
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ddBytesEven: []byte{11, 12},
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},
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args: args{
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seqNo: []uint16{65526 + 5, 65527 + 5, 65530 + 5, 0 /* 65531 input */, 1 /* 65532 input */, 2 /* 65533 input */, 3 /* 65534 input */},
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},
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// although 65526 is originally pushed, that would have been reset by 65532 (padding only packet)
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// because of trying to add an exclusion range before highest sequence number which will fail
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// and the resulting fix up of the exclusion range slots
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want: []uint16{65530, 65533, 65534},
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},
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}
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for _, tt := range tests {
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tt := tt
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t.Run(tt.name, func(t *testing.T) {
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n := newSequencer(5, true, logger.GetLogger())
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for _, i := range tt.fields.inputs {
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if i.isPadding {
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n.pushPadding(i.seqNo+tt.fields.offset, i.seqNo+tt.fields.offset)
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} else {
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if i.seqNo%2 == 0 {
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n.push(time.Now(), i.seqNo, i.seqNo+tt.fields.offset, 123, tt.fields.markerEven, 3, tt.fields.codecBytesEven, tt.fields.ddBytesEven)
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} else {
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n.push(time.Now(), i.seqNo, i.seqNo+tt.fields.offset, 123, tt.fields.markerOdd, 3, tt.fields.codecBytesOdd, tt.fields.ddBytesOdd)
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}
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}
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}
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time.Sleep((ignoreRetransmission + 10) * time.Millisecond)
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g := n.getExtPacketMetas(tt.args.seqNo)
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var got []uint16
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for _, sn := range g {
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got = append(got, sn.sourceSeqNo)
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if sn.sourceSeqNo%2 == 0 {
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require.Equal(t, tt.fields.markerEven, sn.marker)
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require.Equal(t, tt.fields.codecBytesEven, sn.codecBytes)
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require.Equal(t, tt.fields.ddBytesEven, sn.ddBytes)
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} else {
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require.Equal(t, tt.fields.markerOdd, sn.marker)
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require.Equal(t, tt.fields.codecBytesOdd, sn.codecBytes)
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require.Equal(t, tt.fields.ddBytesOdd, sn.ddBytes)
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}
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}
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if !reflect.DeepEqual(got, tt.want) {
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t.Errorf("getExtPacketMetas() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func Test_sequencer_getNACKSeqNo_no_exclusion(t *testing.T) {
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type args struct {
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seqNo []uint16
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}
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type input struct {
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seqNo uint64
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isPadding bool
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}
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type fields struct {
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inputs []input
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offset uint64
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markerOdd bool
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markerEven bool
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codecBytesOdd []byte
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codecBytesEven []byte
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ddBytesOdd []byte
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ddBytesEven []byte
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}
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tests := []struct {
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name string
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fields fields
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args args
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want []uint16
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}{
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{
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name: "Should get correct seq numbers",
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fields: fields{
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inputs: []input{
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{2, false},
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{3, false},
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{4, false},
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{7, false},
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{8, false},
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{9, true},
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{11, false},
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{10, true},
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{12, false},
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{13, false},
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},
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offset: 5,
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markerOdd: true,
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markerEven: false,
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codecBytesOdd: []byte{1, 2, 3, 4},
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codecBytesEven: []byte{5, 6, 7},
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ddBytesOdd: []byte{8, 9, 10},
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ddBytesEven: []byte{11, 12},
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},
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args: args{
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seqNo: []uint16{4 + 5, 5 + 5, 8 + 5, 9 + 5, 10 + 5, 11 + 5, 12 + 5},
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},
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// although 4 and 8 were originally added, they would be too old after a cycle of sequencer buffer
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want: []uint16{11, 12},
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},
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}
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for _, tt := range tests {
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tt := tt
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t.Run(tt.name, func(t *testing.T) {
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n := newSequencer(5, false, logger.GetLogger())
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for _, i := range tt.fields.inputs {
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if i.isPadding {
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n.pushPadding(i.seqNo+tt.fields.offset, i.seqNo+tt.fields.offset)
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} else {
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if i.seqNo%2 == 0 {
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n.push(time.Now(), i.seqNo, i.seqNo+tt.fields.offset, 123, tt.fields.markerEven, 3, tt.fields.codecBytesEven, tt.fields.ddBytesEven)
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} else {
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n.push(time.Now(), i.seqNo, i.seqNo+tt.fields.offset, 123, tt.fields.markerOdd, 3, tt.fields.codecBytesOdd, tt.fields.ddBytesOdd)
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}
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}
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}
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time.Sleep((ignoreRetransmission + 10) * time.Millisecond)
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g := n.getExtPacketMetas(tt.args.seqNo)
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var got []uint16
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for _, sn := range g {
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got = append(got, sn.sourceSeqNo)
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if sn.sourceSeqNo%2 == 0 {
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require.Equal(t, tt.fields.markerEven, sn.marker)
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require.Equal(t, tt.fields.codecBytesEven, sn.codecBytes)
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require.Equal(t, tt.fields.ddBytesEven, sn.ddBytes)
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} else {
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require.Equal(t, tt.fields.markerOdd, sn.marker)
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require.Equal(t, tt.fields.codecBytesOdd, sn.codecBytes)
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require.Equal(t, tt.fields.ddBytesOdd, sn.ddBytes)
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}
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}
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if !reflect.DeepEqual(got, tt.want) {
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t.Errorf("getExtPacketMetas() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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