* sfu: filter VP9 and AV1 simulcast temporal layers with the dependency descriptor
Every simulcast codec gets an explicit temporal layer selector. With the
dependency descriptor, VP8, VP9 and AV1 filter temporal layers by frame and
forward the descriptor. Without it, a pass-through selector forwards every
temporal layer and reports the target as reached, so a pending target cannot
block allocation. VP8DD becomes the codec-neutral DDTemporal.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* sfu: VP8-only padding header in DDTemporal, structure gate on presence
DDTemporal returns the one byte VP8 payload descriptor for padding only for
VP8. The descriptor forwarder takes a structure from any packet that carries
one, as the parser accepts it only on the first packet of a frame.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
* sfu: parse VP8 and VP9 payload descriptors without an allocation
Replace ExtPacket.Payload with typed VP8 and VP9 pointer fields that point
at backing structs inside the ExtPacket, so parsing does not allocate and a
wrong codec type is a compile error.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* sfu: copy the VP8 descriptor in the test packet helper
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
* 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>
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Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
CodecMunger.UpdateAndGet returned a freshly allocated slice for every
forwarded packet on every down track. Return the header in a fixed array
with a length instead and marshal into it with MarshalTo. TranslationParams
carries the array; WriteRTP slices it locally.
UpdateAndGet now allocates zero times per call (was one). Escape analysis
confirms TranslationParams stays on the stack.
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
* Update go deps
Generated by renovateBot
* update api usage
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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: David Zhao <dz@livekit.io>
* Do not restart receiver on codec change mid-session.
This is not supported and was an erroneous change during the
receiver_base/buffer_base + RTP stream restart consolidation. Also make
the codec munger creation more resilient.
* fix test
* Do codec munging when munging RTP header.
It was possible for probe packets to get in between RTP munging and
codec munging and throw off sequence number while dropping packets.
Affected only VP8 as it does codec munging.
* do not pass in buffer as it is created anyway
* flip fields
* flip order
* fix test
* call translate for all tracks
* simplify
