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implement openal hrtf audio support

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- upgrade openal version
        - add support to create openal context with hrtf enabled
        - add option in audio settings for hrtf enablement
        - add static property on Audio class for runtime toggling of hrtf
	- fix bug with left/right and front/back being reversed
This commit is contained in:
envision3d
2023-03-04 20:37:56 -06:00
parent a7c5397641
commit 4ce89f56cc
15 changed files with 476 additions and 245 deletions
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28
Source/Engine/Audio/OpenAL/AudioBackendOAL.cpp
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@@ -17,10 +17,11 @@
//#define AL_LIBTYPE_STATIC
#include <OpenAL/al.h>
#include <OpenAL/alc.h>
#include <OpenAL/alext.h>
#define ALC_MULTIPLE_LISTENERS 0
#define FLAX_POS_TO_OAL(vec) ((ALfloat)vec.X * -0.01f), ((ALfloat)vec.Y * 0.01f), ((ALfloat)vec.Z * -0.01f)
#define FLAX_POS_TO_OAL(vec) ((ALfloat)vec.X * -0.01f), ((ALfloat)vec.Y * 0.01f), ((ALfloat)vec.Z * 0.01f)
#if BUILD_RELEASE
#define ALC_CHECK_ERROR(method)
#else
@@ -55,7 +56,6 @@
namespace ALC
{
ALCdevice* Device = nullptr;
bool AL_EXT_float32 = false;
Array<ALCcontext*, FixedAllocation<AUDIO_MAX_LISTENERS>> Contexts;
bool IsExtensionSupported(const char* extension)
@@ -156,7 +156,7 @@ namespace ALC
void RebuildContexts(bool isChangingDevice)
{
LOG(Info, "Rebuild audio contexts");
LOG(Info, "Audio: Rebuilding audio contexts");
if (!isChangingDevice)
{
@@ -180,7 +180,18 @@ namespace ALC
}
#else
Contexts.Resize(1);
Contexts[0] = alcCreateContext(Device, nullptr);
if (Audio::GetUseHRTFWhenAvailable())
{
LOG(Info, "Audio: Enabling OpenAL HRTF");
ALCint attrs[] = { ALC_HRTF_SOFT, ALC_TRUE };
Contexts[0] = alcCreateContext(Device, attrs);
}
else
{
Contexts[0] = alcCreateContext(Device, nullptr);
}
#endif
// If only one context is available keep it active as an optimization.
@@ -315,6 +326,11 @@ void AudioBackendOAL::Listener_TransformChanged(AudioListener* listener)
alListener3f(AL_POSITION, FLAX_POS_TO_OAL(position));
}
void AudioBackendOAL::Listener_ReinitializeAll()
{
ALC::RebuildContexts(false);
}
void AudioBackendOAL::Source_OnAdd(AudioSource* source)
{
ALC::Source::Rebuild(source);
@@ -567,7 +583,7 @@ void AudioBackendOAL::Buffer_Write(uint32 bufferId, byte* samples, const AudioDa
{
if (info.BitDepth > 16)
{
if (ALC::AL_EXT_float32)
if (ALC::IsExtensionSupported("AL_EXT_float32"))
{
const uint32 bufferSize = info.NumSamples * sizeof(float);
float* sampleBufferFloat = (float*)Allocator::Allocate(bufferSize);
@@ -688,7 +704,6 @@ void AudioBackendOAL::Base_OnActiveDeviceChanged()
}
// Setup
ALC::AL_EXT_float32 = ALC::IsExtensionSupported("AL_EXT_float32");
ALC::RebuildContexts(true);
}
@@ -800,7 +815,6 @@ bool AudioBackendOAL::Base_Init()
}
// Init
ALC::AL_EXT_float32 = ALC::IsExtensionSupported("AL_EXT_float32");
SetDopplerFactor(AudioSettings::Get()->DopplerFactor);
ALC::RebuildContexts(true);
Audio::SetActiveDeviceIndex(activeDeviceIndex);

1
Source/Engine/Audio/OpenAL/AudioBackendOAL.h
View File

@@ -18,6 +18,7 @@ public:
void Listener_OnRemove(AudioListener* listener) override;
void Listener_VelocityChanged(AudioListener* listener) override;
void Listener_TransformChanged(AudioListener* listener) override;
void Listener_ReinitializeAll() override;
void Source_OnAdd(AudioSource* source) override;
void Source_OnRemove(AudioSource* source) override;
void Source_VelocityChanged(AudioSource* source) override;