The network rate is based on a strict leaky buck with no underrun.
The media rate has almost the same algorithm, but allows the bufer level
to become negative down to -5 frames worth of data. This allows tracking
the average bitrate over a window and can be used as an alternative
upper bound when the encoder target is not link constrained.
Bug: webrtc:10155
Change-Id: I0d72157f7c0f0799e15572bf4797fa1b5636b22e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/129723
Commit-Queue: Erik Språng <sprang@webrtc.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27392}
The overshoot detector uses a simple pacer model to determine an
estimate of how much the encoder is overusing the target bitrate.
This utilization factor can then be adjuster for when configuring the
actual target bitrate.
Spatial layers (simulcast streams) are adjusted separately.
Temporal layers are measured separately, but are combined into a single
utilization factor per spatial layer.
Bug: webrtc:10155
Change-Id: I8ea58dc6c4871e880553d7c22202f11cb2feb216
Reviewed-on: https://webrtc-review.googlesource.com/c/114886
Commit-Queue: Erik Språng <sprang@webrtc.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26573}
