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audio: WASAPI exclusive resampling, buffer size increase options (#727)

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## Link to GitHub Issue or related Pull Request, if one exists
n/a

## Description of change

Resampler:
Implement resampler for exclusive mode streams, as we are seeing more
and more devices - not just laptops but onboard audio devices - that
only support 48khz and not 44.1khz. Should work with volume boost (gain
calculated inside resample) and also downmixer (hands off intermediate
scratch buffers).

Buffer size increase:
By default many of these games request a tiny buffer when in shared mode
(TDJ uses 3ms). On some audio setup this results in crackling due to
underflow. Add an option to forcibly increase the buffer size.

## Testing
With resampler set to 48kHz and buffer set to 20ms I can reliably boot
and play IIDX on my display port monitor's speakers; previously this
wasn't possible. IIDX is event-driven.

Tested SDVX7 as well at 48kHz, which opens timer-driven streams.
This commit is contained in:
bicarus
2026-06-02 01:55:50 -07:00
committed by GitHub
parent b517ef3182
commit 48033816a8
17 changed files with 967 additions and 128 deletions
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src/spice2x/launcher/launcher.cpp
+12
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@@ -1106,6 +1106,18 @@ int main_implementation(int argc, char *argv[]) {
hooks::audio::VOLUME_BOOST = (float) std::pow(10.0, decibels / 20.0);
}
}
if (options[launcher::Options::AudioResample].is_active()) {
const uint32_t rate = options[launcher::Options::AudioResample].value_uint32();
if (rate > 0) {
hooks::audio::RESAMPLE_RATE = rate;
}
}
if (options[launcher::Options::AudioExclusiveBuffer].is_active()) {
const uint32_t ms = options[launcher::Options::AudioExclusiveBuffer].value_uint32();
if (ms > 0) {
hooks::audio::EXCLUSIVE_BUFFER_MS = ms;
}
}
if (options[launcher::Options::AudioBackend].is_active()) {
auto &name = options[launcher::Options::AudioBackend].value_text();