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

## 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
@@ -73,11 +73,7 @@ HRESULT STDMETHODCALLTYPE DummyIAudioClient::Initialize(
// verbose output
log_info("audio::wasapi", "IAudioClient::Initialize hook hit");
log_info("audio::wasapi", "... ShareMode : {}", share_mode_str(ShareMode));
log_info("audio::wasapi", "... StreamFlags : {}", stream_flags_str(StreamFlags));
log_info("audio::wasapi", "... hnsBufferDuration : {}", hnsBufferDuration);
log_info("audio::wasapi", "... hnsPeriodicity : {}", hnsPeriodicity);
print_format(pFormat);
print_format(ShareMode, StreamFlags, hnsBufferDuration, hnsPeriodicity, pFormat);
CHECK_RESULT(this->backend->on_initialize(
&ShareMode,