- The entire editor can now be compiled using Clang on Windows. It also runs (as long as you use the MSVC linker.)
- Use UEBuildWindows.bCompileWithClang=true to help test Clang support
- Most UE4 programs can now be compiled using Clang on Windows, and linked using the Clang linker on Windows
- Many C++ syntax fixes to resolve Clang errors and warnings when on Windows
- Clang on Windows now supports PCH files properly (but not "shared" PCHs, yet.)
- Hacked the DirectX XAudio2 headers slightly to work around a macro pasting bug in Clang
[CL 2494439 by Mike Fricker in Main branch]
- Created audio device manager which manages weak ref handles to audio devices
- Audio device handles are created with WorldContexts and accessed through UWorld objects
- All access to audio devices are now through audio device handles
- There is a main/default audio device for GEngine for use with the Editor and single worldcontext games
#codereview marc.audy, matthew.griffin
[CL 2477046 by Aaron McLeran in Main branch]
Audio Streaming Manager will keep track of SoundWaves that are marked for streaming and any sound sources that are using those waves.
Added functionality to all Sound Buffers to report which chunk of audio they are currently reading from, which the manager will use to request the current and next chunk be loaded in memory.
Added a struct to contain all of the additional information needed for a Streaming SoundWave and set off requests, which the manager will also keep track of to avoid increasing the memory size of all SoundWaves.
Tidied up the Opus Decompressor to reduce the amount of repeated code and share the basic functionality for streaming and non-streaming usage.
Set XAudio sounds up to use streaming data, with a function added to the audio device so that other platforms won't try to make use of it for the moment.
[CL 2123061 by Matthew Griffin in Main branch]
Moved most of the contents of FAudioDevice::FreeResource to USoundWave::FreeResources so that we can be sure that all memory is cleared up during teardown.
Removed FreeResource function from some subclasses of audio device, as they weren't doing anything different than the base one.
Also removed ListSounds function from these same classes as that seems to have fallen behind current base class version and isn't used anyway.
Removed platform specific audio buffer storage so that there isn't confusion about which is being used and ensured that casts are used when necessary.
Fixed compile issue with STAT_AudioResourceCreationTime for HTML5.
[CL 2109273 by Matthew Griffin in Main branch]
Followed pattern set out by texture streaming so that each chunk of audio data resides in its own bulkdata struct. It is currently possible to split audio into chunks when SoundWaves are marked for streaming but there is no way of doing this exposed at present.
Changed the parameters of FAudioDevice::GetRuntimeFormat so that the relevant SoundWave must be passed in, to allow for different formats for individual sounds/streaming options.
USoundWave::FreeResources no longer resets the NumChannels as it is unnecessary and causes sounds to be unable to play after the OGG data is flushed when attempting to switch to OPUS.
[CL 2099012 by Matthew Griffin in Main branch]
Moved functions to check for and select Compressed Audio Info class to the audio device as the audio formats are not accessible in cooked builds (and shouldn't really need to be either).
[CL 2057758 by Matthew Griffin in Main branch]
Added an audio format for Opus, which also required a resampler to make sure that all imported sounds are converted to a compatible sample rate.
Added the speex resampler from the opus tools package to the third party source, including built libraries for windows and mac.
Changed FVorbisAudioInfo so that it inherits from an interface for any kind of compressed audio, which can be used everywhere instead of being wrapped in #WITH_VORBIS.
Added FOpusAudioInfo to decompress Opus data, not sure at this point whether it's only going to be used for streaming audio but works for non-streamed playback.
[CL 2056352 by Matthew Griffin in Main branch]
