How can I use USoundWaveStreaming?

Development Programming & Scripting C++
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1

Hi. I want to use USoundWaveStreaming to microphone input.

USoundWaveStreaming* soundStreaming;
soundStreaming = new USoundWaveStreaming();
soundStreaming->QueueAudio(sa, samples);

After compiling Editor has crashed

MachineId:79F1B448465D2FDADA62F4BCF29A15EE
EpicAccountId:1a02678b3f7144d7add17b16d2962395

Unknown exception - code 00000001 (first/second chance not available)

"Fatal error: [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.10\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp] [Line: 2082] 
UObject(const FObjectInitializ

UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\misc\outputdevice.cpp:374]
UE4Editor_CoreUObject!UObject::UObject() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:2083]
UE4Editor_Engine!USoundBase::USoundBase() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\soundbase.cpp:10]
UE4Editor_Engine!USoundWave::USoundWave() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\soundwave.cpp:59]
UE4Editor_Engine!USoundWaveProcedural::USoundWaveProcedural() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\soundwaveprocedural.cpp:7]
UE4Editor_TrdCppVoiceTest_9393!ATrdCppVoiceTestCharacter::ATrdCppVoiceTestCharacter() [e:\unrealprojects\trdcppvoicetest\source\trdcppvoicetest\trdcppvoicetestcharacter.cpp:51]
UE4Editor_HotReload!FHotReloadClassReinstancer::ReconstructClassDefaultObject() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\developer\hotreload\private\hotreloadclassreinstancer.cpp:198]
UE4Editor_HotReload!FHotReloadClassReinstancer::RecreateCDOAndSetupOldClassReinstancing() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\developer\hotreload\private\hotreloadclassreinstancer.cpp:234]

I think USoundWaveStreaming need to be initialized, but I have no mind how to do it.
Thanks.

2

You are using new instead of NewObject, in UE4 you can not use some vanilla C++ stuff like those operators, UObjects need their very own initialization. Try changing your code to:

USoundWaveProcedural* SoundStreaming = NewObject<USoundWaveProcedural>();

From 4.9 USoundWaveStreaming is also deprecated and replaced by USoundWaveProcedural.

If you a usage example check the CreateVoiceAudioComponent in the engine source.

3

Its works, but now when I use QueueAudio I have another crash
Access violation - code c0000005 (first/second chance not available)

""

UE4Editor_Core!scalable_msize() [d:\depot\ue4\engine\source\thirdparty\inteltbb\inteltbb-4.0\src\tbbmalloc\frontend.cpp:2615]
UE4Editor_Core!FMallocTBB::Realloc() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\hal\malloctbb.cpp:70]
UE4Editor_Core!FHeapAllocator::ForAnyElementType::ResizeAllocation() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\containers\containerallocationpolicies.h:344]
UE4Editor_Engine!USoundWaveProcedural::QueueAudio() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\soundwaveprocedural.cpp:19]
UE4Editor_TrdCppVoiceTest!ATrdCppVoiceTestCharacter::VoiceTest() [e:\unrealprojects\trdcppvoicetest\source\trdcppvoicetest\trdcppvoicetestcharacter.cpp:160]

My code:

TSharedPtr<class IVoiceCapture> VoiceCapture;
USoundWaveProcedural* SoundStreaming;

// Voice init
	VoiceCapture = FVoiceModule::Get().CreateVoiceCapture();
	VoiceCapture->Start();

	SoundStreaming = NewObject<USoundWaveProcedural>();
	SoundStreaming->SampleRate = 22050;
	SoundStreaming->NumChannels = 1;
	SoundStreaming->Duration = INDEFINITELY_LOOPING_DURATION;
	SoundStreaming->SoundGroup = SOUNDGROUP_Voice;
	SoundStreaming->bLooping = false;

uint32 bytesAvailable = 0;
	EVoiceCaptureState::Type CaptureState = VoiceCapture->GetCaptureState(bytesAvailable);
	if (CaptureState == EVoiceCaptureState::Ok && bytesAvailable > 0)
	{
		UE_LOG(LogTemp, Warning, TEXT("Mic working"));
		uint32 const maxBytes = 1000000;
		uint8 buf[maxBytes];
		memset(buf, 0, maxBytes);
		uint32 readBytes = 0;
		VoiceCapture->GetVoiceData(buf, maxBytes, readBytes);

		SoundStreaming->QueueAudio(buf, readBytes);
	}
4

/AntXXX18 Have you got this working? I am trying to do the exact samething. Playing mic input (virtual input from maxmsp). Let me know PLEASE!!!

5

For future googlers, in addition to what Moss mentioned, you’ll also need to attah the USoundWaveProcedural object to an audio component via MyAudioDevice->CreateComponent(MySoundWaveProceduralObject, ...) to avoid the Access violation - code c0000005

Refer to CreateVoiceAudioComponent for an example