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.

src/spice2x/hooks/audio/backends/wasapi/audio_client.h

@@ -9,9 +9,9 @@
 #include "util/logging.h"
 
 #include "downmix.h"
+#include "resample.h"
 
 #include "audio_render_client.h"
-
 // {1FBC8530-AF3E-4128-B418-115DE72F76B6}
 static const GUID IID_WrappedIAudioClient = {
     0x1fbc8530, 0xaf3e, 0x4128, { 0xb4, 0x18, 0x11, 0x5d, 0xe7, 0x2f, 0x76, 0xb6 }
@@ -103,4 +103,9 @@ struct WrappedIAudioClient : IAudioClient3 {
     // surround -> stereo downmix. the real device is opened as stereo while the game keeps
     // writing multi-channel audio into a scratch buffer that we downmix in the render client.
     hooks::audio::Downmix downmix;
+
+    // native-rate -> target-rate sample-rate conversion. the real device is opened at the target
+    // rate while the game keeps writing its native-rate audio into a scratch buffer that we
+    // resample in the render client.
+    hooks::audio::Resampler resample;
 };