- Move audio bus functionality from Mixer Device to new Audio Bus Subsystem
- Add new audio bus key struct so that FMixerAudioBuses do not have to be created with UObject ids
#jira UE-169610
#rb phil.popp, ryan.mangin, rob.gay
#preflight 63906195255f07df8e452b8c
[CL 23429172 by helen yang in ue5-main branch]
This fixes a bug where audio bus reader nodes might never start popping audio because AudioCallbackBufferFrameSize is set to a value other than the default 1024, such as 256.
Replace AddPatchForAudioBus with AddPatchOutputForAudioBus, which is parameterized by the desired number of frames and channels in the patch output.
Update AddPatchInputForAudioBus to match.
Both functions use a new MakePatch function to create a patch based on the parameters and scaled to fit the number of blocks specified by the new "au.PatchBufferBlocks" cvar.
Add support for quad, 5.1, and 7.1 bus reader and writer nodes.
[REVIEW] [at]phil.popp
#preflight 6386191a4004f73f62c48875
[CL 23312512 by nicholas howe in ue5-main branch]
Adds a metasound node that sends its audio input to an audio bus.
Modifies the audio mixer interface to support the node.
FMixerSourceManager::StartAudioBus no longer sets bIsPlaying to false on sources that use an audio bus when the audio bus starts.
FMixerAudioBus::MixBuffer mixes its patch inputs into its MixedSourceData buffer, so that the patch input data is available when CopyCurrentBuffer is used to retrieve the mix.
[REVIEW] [at]aaron.mcleran [at]buzz.burrowes [at]phil.popp
#preflight 6372639c5368a3230a4ed041
[CL 23123823 by nicholas howe in ue5-main branch]
