mirror of
https://github.com/hanzoai/livekit.git
synced 2026-10-30 18:29:34 +00:00
zeekay
e9292da479
This fork lived at github.com/hanzoai/livekit but still declared
`module github.com/livekit/livekit-server`, so all 505 self-references pointed
at upstream. A fork that does not own its module path is the exact thing the
owned-module-paths rule exists to prevent: every import line in every consumer
carries someone else's brand, and `go get` resolves to their code, not ours.
module + 505 self-imports github.com/livekit/livekit-server -> github.com/hanzoai/livekit
KV client github.com/redis/go-redis/v9 -> github.com/hanzokv/go/v9
message bus github.com/livekit/psrpc -> github.com/hanzoai/psrpc
psrpc had to be forked (hanzoai/psrpc, Apache-2.0) because its bus is typed
against the KV client — the same shape redsync had for hanzoai/git.
DELIBERATELY NOT FORKED: github.com/livekit/{protocol,mediatransportutil,
mageutil} keep their addresses. Only `protocol` still reaches go-redis, through
a single file (redis/redis.go) out of 305. Forking an 11.5MB core wire-protocol
library that this server must track in lockstep — and that upstream pushed
yesterday — to change one file trades a tidy dependency graph for permanent
divergence on the fastest-moving dependency here. So one indirect
github.com/redis/go-redis entry remains, via livekit/protocol/redis, and that
is the correct place for it to live.
144 lines
3.4 KiB
Go
144 lines
3.4 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 videolayerselector
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import (
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"github.com/hanzoai/livekit/pkg/sfu/buffer"
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"github.com/livekit/protocol/logger"
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)
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type Simulcast struct {
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*Base
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}
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func NewSimulcast(logger logger.Logger) *Simulcast {
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return &Simulcast{
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Base: NewBase(logger),
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}
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}
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func NewSimulcastFromOther(vls VideoLayerSelector) *Simulcast {
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switch vls := vls.(type) {
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case *Null:
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return &Simulcast{
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Base: vls.Base,
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}
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case *Simulcast:
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return &Simulcast{
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Base: vls.Base,
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}
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case *DependencyDescriptor:
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return &Simulcast{
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Base: vls.Base,
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}
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case *VP9:
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return &Simulcast{
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Base: vls.Base,
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}
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default:
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return nil
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}
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}
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func (s *Simulcast) IsOvershootOkay() bool {
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return true
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}
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func (s *Simulcast) Select(extPkt *buffer.ExtPacket, layer int32) (result VideoLayerSelectorResult) {
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populateSwitches := func(isActive bool, reason string) {
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result.IsSwitching = true
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if !isActive {
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result.IsResuming = true
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}
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if reason != "" {
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s.logger.Debugw(
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reason,
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"previous", s.previousLayer,
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"current", s.currentLayer,
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"previousTarget", s.previousTargetLayer,
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"target", s.targetLayer,
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"max", s.maxLayer,
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"layer", layer,
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"req", s.requestSpatial,
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"maxSeen", s.maxSeenLayer,
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"feed", extPkt.Packet.SSRC,
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)
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}
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}
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if s.currentLayer.Spatial != s.targetLayer.Spatial {
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currentLayer := s.currentLayer
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// Two things to check when not locked to target
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// 1. Opportunistic layer upgrade - needs a key frame
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// 2. Need to downgrade - needs a key frame
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isActive := s.currentLayer.IsValid()
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found := false
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reason := ""
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if extPkt.IsKeyFrame {
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if layer > s.currentLayer.Spatial && layer <= s.targetLayer.Spatial {
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reason = "upgrading layer"
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found = true
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}
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if layer < s.currentLayer.Spatial && layer >= s.targetLayer.Spatial {
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reason = "downgrading layer"
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found = true
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}
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if found {
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currentLayer.Spatial = layer
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currentLayer.Temporal = extPkt.VideoLayer.Temporal
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}
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}
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if found {
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s.previousLayer = s.currentLayer
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s.currentLayer = currentLayer
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s.previousTargetLayer = s.targetLayer
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if s.currentLayer.Spatial >= s.maxLayer.Spatial || s.currentLayer.Spatial == s.maxSeenLayer.Spatial {
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s.targetLayer.Spatial = s.currentLayer.Spatial
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}
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populateSwitches(isActive, reason)
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}
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}
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// if locked to higher than max layer due to overshoot, check if it can be dialed back
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if s.currentLayer.Spatial > s.maxLayer.Spatial && layer <= s.maxLayer.Spatial && extPkt.IsKeyFrame {
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s.previousLayer = s.currentLayer
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s.currentLayer.Spatial = layer
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s.previousTargetLayer = s.targetLayer
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if s.currentLayer.Spatial >= s.maxLayer.Spatial || s.currentLayer.Spatial == s.maxSeenLayer.Spatial {
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s.targetLayer.Spatial = layer
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}
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populateSwitches(true, "adjusting overshoot")
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}
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result.RTPMarker = extPkt.Packet.Marker
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result.IsSelected = layer == s.currentLayer.Spatial
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result.IsRelevant = false
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return
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}
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