## Link to GitHub Issue or related Pull Request, if one exists
Fixes#681
## Description of change
`Sleep` and `sleep_for()` can be very inaccurate and varies depending on
what the OS gives us...
### `timeBeginPeriod(1)`
On boot, we are now calling `timeBeginPeriod(1)`, which affects the
whole process but makes `Sleep` more accurate. There is some risk here
if any game was relying on doing things like `Sleep(1)` and expecting it
to run for 15.6ms. Most games already call `timeBeginPeriod(1)` in the
game engine, though not the whole time, so I'm hoping that this is not
too impactful.
### Opt out of Win11 power throttling
Ensure that timer resolution change above is respected even when the
window is occluded / minimized by opting out of throttling via
`PROCESS_POWER_THROTTLING_IGNORE_TIMER_RESOLUTION`.
### Use Win10 high resolution timer instead of Sleep
On Win10 1803 and above, there is a new OS-level API for high resolution
timers; if this is available, use it
(`CREATE_WAITABLE_TIMER_HIGH_RESOLUTION`). Worth noting that WINE
doesn't support this currently.
If not, fall back to `Sleep`, which is significantly better than
`sleep_for()` in my experiments.
Callers of Sleep / sleep_for were replaced with this new timer. Most of
them anyway; calls to Sleep() with more than 100ms+ was left alone.
### Add an option as a chicken bit
To opt out I'm adding a new option called `Use Legacy Timers` which will
revert to behavior before this PR. The code paths that switched from
`sleep_for` to `Sleep` will remain in place though, not affected by the
option.
## Expected changes
In some I/O emulation modules, poll threads may run more frequently,
resulting in lower latency.
It also means that spice overall may use more CPU resources and power.
If you don't like this, you can always enable the option to opt out;
e.g., if you're on old arcade cab PC.
## Testing
DDR p4io - ok
drs touch hook - ok
IIDX camera hook - ok
CCJ trackball - ok
## Link to GitHub Issue or related Pull Request, if one exists
n/a
## Description of change
On some Win11 systems,
`CoCreateInstance(CLSID_DirectSoundI3DL2ReverbDMO)` started to fail with
`ERROR_MOD_NOT_FOUND` instead of `REGDB_E_CLASSNOTREG` for some reason.
## Testing
User tested.
## Link to GitHub Issue or related Pull Request, if one exists
## Description of change
Deprecate backend conversion options and replace with one unified option
for enabling WASAPI exclusive conversion to ASIO.
The new option takes in a string (ASIO driver name) and when filled out,
it automatically enables the ASIO backend.
This is to avoid confusion that was caused by the previous option - the
fact that it was split into two (one to enable the conversion, another
to optionally pick which ASIO driver to use) and that user needed to
specify an integer as opposed to the driver name.
## Testing
Tested on IIDX33. Old options should continue to work.
## Link to GitHub Issue, if one exists
Fixes#509
## Description of change
Implement `WrappedIAudioClient3`.
For now, we have only seen SDVX use it (EG final) and only when the
shared mode patch is enabled. Exclusive still goes through version 1.
This means that for V3 we can forego implementing backend conversion
logic (for now).
Only significant addition is `InitializeSharedAudioStream` and this IS
called by SDVX when shared mode patch is enabled.
## Testing
Tested EG final, tested year 1 data, also IIDX shared/exclusive wasapi.
## Link to GitHub Issue, if one exists
#477
## Description of change
Arena cab has two sound cards and it uses `WrappedIMMDeviceCollection`
to set the volume to 100% on boot on both, instead of the typical
`GetDefaultAudioEndpoint`.
## Testing
Testing Delta, testing other games as well as they are affected.
## Link to GitHub Issue, if one exists
n/a
## Description of change
`acmFormatSuggest` is known to cause significant perf issues on Linux;
add a hook to return cached results.
The fix is only active in the Linux variant.
For discussion, see
* https://codeberg.org/nixac/spicetools/issues/2
* https://codeberg.org/nixac/spicetools/issues/4
## Testing
I've only tested this on Windows, checking if iidx and popn can boot,
play songs without audio issues.
bicarus