snapshot of https://github.com/livekit/livekit.git @ 08c5433449c106943231037d0b892895f6e92d3b (2026-09-15)

pkg/sfu/videolayerselector/temporallayerselector/null.go

@@ -0,0 +1,31 @@
+// Copyright 2023 LiveKit, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package temporallayerselector
+
+import (
+	"github.com/livekit/livekit-server/pkg/sfu/buffer"
+)
+
+type Null struct{}
+
+func NewNull() *Null {
+	return &Null{}
+}
+
+func Select(_extPkt *buffer.ExtPacket, current int32, _target int32) (this int32, next int32) {
+	this = current
+	next = current
+	return
+}

pkg/sfu/videolayerselector/temporallayerselector/temporallayerselector.go

@@ -0,0 +1,21 @@
+// Copyright 2023 LiveKit, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package temporallayerselector
+
+import "github.com/livekit/livekit-server/pkg/sfu/buffer"
+
+type TemporalLayerSelector interface {
+	Select(extPkt *buffer.ExtPacket, current int32, target int32) (this int32, next int32)
+}

pkg/sfu/videolayerselector/temporallayerselector/vp8.go

@@ -0,0 +1,57 @@
+// Copyright 2023 LiveKit, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package temporallayerselector
+
+import (
+	"github.com/livekit/livekit-server/pkg/sfu/buffer"
+	"github.com/livekit/mediatransportutil/pkg/codec"
+	"github.com/livekit/protocol/logger"
+)
+
+type VP8 struct {
+	logger logger.Logger
+}
+
+func NewVP8(logger logger.Logger) *VP8 {
+	return &VP8{
+		logger: logger,
+	}
+}
+
+func (v *VP8) Select(extPkt *buffer.ExtPacket, current int32, target int32) (this int32, next int32) {
+	this = current
+	next = current
+	if current == target {
+		return
+	}
+
+	vp8, ok := extPkt.Payload.(codec.VP8)
+	if !ok {
+		return
+	}
+
+	tid := extPkt.Temporal
+	if current < target {
+		if tid > current && tid <= target && vp8.S {
+			this = tid
+			next = tid
+		}
+	} else {
+		if extPkt.Packet.Marker {
+			next = target
+		}
+	}
+	return
+}