## Link to GitHub Issue or related Pull Request, if one exists
n/a
## Description of change
This new option, `-wasapishared`, detects when the game opens WASAPI
Exclusive stream and forcibly opens a shared mode stream instead on the
real device.
#### Benefits of this:
1. No need for `force wasapi shared` patches
2. No need to change sample rate of audio devices before starting up
games
3. Adds ability to boot in shared mode even for games that do not have
shared wasapi changes (old GITADORA, popn HC)
As a result, this option is strictly better than `shared wasapi` patches
available for many games.
#### Downsides:
1. OS resampling will add a small latency, but not big enough to be
noticeable.
2. Using shared mode instead of exclusive mode adds latency, of course.
(If you cared about latency, you would use the low latency option, or
use exclusive or asio)
Basically it's the "make things work" button for audio that should work
for almost all games that we support.
The option has no effect if the game opens in shared mode.
## Testing
SDVX7 - ok
GITADORA GW - ok
popn HC - ok
IIDX - ok
## 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.
## Link to GitHub Issue or related Pull Request, if one exists
Fixes#717, fixes#647
## Description of change
Adds an option to downmix surround sound (5.1, 7.1, etc) down to stereo
(2 speakers). This can be used in most WASAPI games, including Gitadora
and FTT.
How it works: when the game tries to open surround format (say, 7.1) we
create a fake buffer and tell the game that it is supported. In reality
we open a 2-channel stream with the real sound card. When the stream
begins, we downmix the channels down to two (using one of many
algorithms) and output to the sound card.
While we're here, implement an option to boost the game volume by some
decibel value, which is a feature often requested by SDVX players. This
was needed since downmixing can sometimes result in quieter audio.
## Testing
Tested GW Delta and FTT.
Downmix doesn't work on IIDX (32 bits) but volume boost works.
## 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.
bicarus