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Raja SubramanianandClaude Opus 5.5
152328c76a
* sfu: filter VP8 temporal layers by frame when the dependency descriptor is sent With the dependency descriptor, libwebrtc sends a one byte VP8 payload descriptor without a picture ID, so the VP8 munger's picture ID based temporal drop logic stops filtering after the first gap. A new VP8DD codec munger decides once per frame from the descriptor's frame number and temporal ID and applies that decision to every packet of the frame. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * sfu: use the VP8 munger when picture IDs come with the dependency descriptor VP8DD needs the one byte VP8 payload descriptor that libwebrtc sends with the dependency descriptor. If a publisher keeps picture IDs next to the descriptor, they need rewriting, so the forwarder switches to the VP8 munger and keeps switching temporal layers with the descriptor. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
46 lines
1.6 KiB
Go
46 lines
1.6 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 codecmunger
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import (
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"errors"
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"github.com/livekit/livekit-server/pkg/sfu/buffer"
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)
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var (
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ErrNotVP8 = errors.New("not VP8")
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ErrOutOfOrderVP8PictureIdCacheMiss = errors.New("out-of-order VP8 picture id not found in cache")
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ErrFilteredVP8TemporalLayer = errors.New("filtered VP8 temporal layer")
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ErrFilteredVP8OutOfOrder = errors.New("filtered out-of-order VP8 packet")
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)
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// MaxHeaderSize is the largest codec header the mungers produce (VP8: 6 bytes).
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const MaxHeaderSize = 8
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type CodecMunger interface {
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GetState() any
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SeedState(state any)
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SetLast(extPkt *buffer.ExtPacket)
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UpdateOffsets(extPkt *buffer.ExtPacket)
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// UpdateAndGet returns the incoming codec header size and the munged
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// header by value, so the per-packet path does not allocate.
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UpdateAndGet(extPkt *buffer.ExtPacket, snOutOfOrder bool, snHasGap bool, maxTemporal int32) (int, [MaxHeaderSize]byte, int, error)
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UpdateAndGetPadding(newPicture bool) ([]byte, error)
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}
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