mirror of
https://github.com/livekit/livekit.git
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98 lines
2.3 KiB
Go
98 lines
2.3 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 streamtracker
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import (
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"time"
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"github.com/livekit/livekit-server/pkg/config"
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"github.com/livekit/protocol/logger"
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)
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type StreamTrackerPacketParams struct {
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Config config.StreamTrackerPacketConfig
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Logger logger.Logger
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}
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type StreamTrackerPacket struct {
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params StreamTrackerPacketParams
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countSinceLast uint32 // number of packets received since last check
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initialized bool
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cycleCount uint32
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}
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func NewStreamTrackerPacket(params StreamTrackerPacketParams) StreamTrackerImpl {
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return &StreamTrackerPacket{
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params: params,
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}
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}
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func (s *StreamTrackerPacket) Start() {
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}
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func (s *StreamTrackerPacket) Stop() {
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}
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func (s *StreamTrackerPacket) Reset() {
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s.countSinceLast = 0
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s.cycleCount = 0
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s.initialized = false
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}
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func (s *StreamTrackerPacket) GetCheckInterval() time.Duration {
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return s.params.Config.CycleDuration
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}
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func (s *StreamTrackerPacket) Observe(_hasMarker bool, _ts uint32) StreamStatusChange {
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if !s.initialized {
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// first packet
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s.initialized = true
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s.countSinceLast = 1
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return StreamStatusChangeActive
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}
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s.countSinceLast++
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return StreamStatusChangeNone
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}
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func (s *StreamTrackerPacket) CheckStatus() StreamStatusChange {
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if !s.initialized {
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// should not be getting called when not initialized, but be safe
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return StreamStatusChangeNone
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}
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if s.countSinceLast >= s.params.Config.SamplesRequired {
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s.cycleCount++
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} else {
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s.cycleCount = 0
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}
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statusChange := StreamStatusChangeNone
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if s.cycleCount == 0 {
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// no packets seen for a period, flip to stopped
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statusChange = StreamStatusChangeStopped
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} else if s.cycleCount >= s.params.Config.CyclesRequired {
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// packets seen for some time after resume, flip to active
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statusChange = StreamStatusChangeActive
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}
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s.countSinceLast = 0
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return statusChange
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}
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