LibDSP can greatly benefit from this nice FFT implementation, so let's
move it into the fitting library :^)
Note that this now requires linking SoundPlayer against LibDSP. That's
not an issue (LibDSP is rather small currently anyways), as we can
probably make great use of it in the future anyways.
Now that we can serialize CSS tokens, we can just hold a string and then
re-parse it when the Supports is evaluated. This feels a little weird,
but it only happens once so it's not going to slow it down much, and it
keep the API cleaner.
This is `<general-enclosed>` in CSS grammar. It represents a section of
a `@media` or `@supports` rule that exists in some future standard that
we don't understand yet, but don't want to make the entire rule invalid.
There's not much that it can usefully do, but we store a string
representation of its contents so that it can be serialized out.
We were returning `int`s from two functions that caused `ErrorOr` to
not recognize the error codes as a special case. For example,
`ETIMEDOUT` was returned as the positive number 66 resulting in all
kinds of defective behavior.
As a result, SDL2's timer subsystem was not working at all, since the
`SDL_MUTEX_TIMEDOUT` value was never returned.
All the way back in commit 1670ee5aba, the default clock for
condition variables was set to `CLOCK_MONOTONIC`, because there was no
other clock available.
However, if a condition variable is initialized without any additional
attributes by an application, they sometimes assume that the absolute
time that is passed to e.g. `pthread_cond_timedwait` is actually based
on a realtime clock, as can be seen here in SDL2:
6f419bdf5f/src/thread/pthread/SDL_syscond.c (L99)
Additionally, the glibc implementation defaults to a realtime clock:
aac54dcd37/nptl/pthread_cond_init.c (L42)
...so we probably should do so as well :^)
Executing `asctl set r 96000` no longer results in weird sample rates
being set on the audio devices. SB16 checks for a sample rate between 1
and 44100 Hz, while AC97 implements double-rate support which allows
sample rates between 8kHz and 96kHZ.
This changes allows for nested browser contexts to be embedded in the
serialized JSON of their container element (like `iframe`) and enables
their inspection in the DOM Inspector.
