Especially simplify calculation of ONVIF UTC times. As a side-effect
this reduces the number of times the running times of a buffer are
calculated, and also causes streams to be interleaved correctly in ONVIF
mode if there is a non-constant UTC-to-running-time difference.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/979>
... instead of forwarding them to a Task via a channel.
This improves CPU usage by 5% according to `udpsrc-benchmark-sender`
with the `tuning` feature using default audio test buffers and
400 streams on the same ts-context.
It is expected to improve latency significantly. This is inferred
from `ts-standalone`: latency shrinks from around 5ms to 1.5µs
using the `task` sink compared to the `async-mutex` sink.
The async Mutex is mandatory here as we need to hold the lock
across await points.
This makes it easy to generate "listenable" signals and to evaluate
discontinuities.
When the `tuning` feature is activated and the `main-elem` property
is set, the element can log the parked duration in %, which is an
image of the CPU usage for the ts-context.
This commit adds a test mode to `udpsrc-benchmark-sender` which
generates default audio buffers from `ts-audiotestsrc`. The `rtp`
mode is modified so that it uses `ts-audiotestsrc`.
Contrary to the existing Task Sink, the Async and Sync Mutex Sinks
handle buffers in the `PadSinkHandler` directly. The Async Mutex
Sink uses an async Mutex for the `PadSinkHandlerInner` while the
Sync Mutex Sink uses... a sync Mutex.
All Sinks share the same settings and stats manager.
Use the `--sink` command line option to select the sink (default is
`sync-mutex` since it allows evaluating the framework with as little
overhead as possible.
Also apply various fixes:
- Only keep the segment start instead of the full `Segment`. This
helps with cache locality (`Segment` is a plain struct with many
fields) and avoids downcasting the generic `Segment` upon each
buffer handling.
- Box the `Stat`s. This should improve cache locality a bit.
- Fix EOS handling which took ages for no benefits in this
particular use case.
- Use a macro to raise log level in the main element.
- Move error handling during item processing in `handle_loop_error`.
This function was precisely designed for this and it should reduce
the `handle_item`'s Future size.
error[E0425]: cannot find value `LIBRARY_NAME` in this scope
--> net/ndi/src/ndisys.rs:336:23
|
336 | path.push(LIBRARY_NAME);
| ^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find value `LIBRARY_NAME` in this scope
--> net/ndi/src/ndisys.rs:339:33
|
339 | path::PathBuf::from(LIBRARY_NAME)
| ^^^^^^^^^^^^ not found in this scope
This can happen at the beginning of a stream if upstream is
rtpjitterbuffer and it has problems figuring out timestamps in the
beginning due to resetting / skew.
