NazaraEngine/src/Nazara/Audio/OpenAL.cpp

474 lines
22 KiB
C++

// Copyright (C) 2015 Jérôme Leclercq
// This file is part of the "Nazara Engine - Audio module"
// For conditions of distribution and use, see copyright notice in Config.hpp
#include <Nazara/Audio/OpenAL.hpp>
#include <Nazara/Core/DynLib.hpp>
#include <Nazara/Core/Error.hpp>
#include <Nazara/Core/Log.hpp>
#include <cstring>
#include <sstream>
#include <stdexcept>
#include <Nazara/Audio/Debug.hpp>
namespace Nz
{
namespace
{
DynLib s_library;
String s_deviceName;
String s_rendererName;
String s_vendorName;
ALCdevice* s_device = nullptr;
ALCcontext* s_context = nullptr;
unsigned int s_version;
std::size_t ParseDevices(const char* deviceString, std::vector<String>& devices)
{
if (!deviceString)
return 0;
std::size_t startSize = devices.size();
std::size_t length;
while ((length = std::strlen(deviceString)) > 0)
{
devices.push_back(String(deviceString, length));
deviceString += length + 1;
}
return devices.size() - startSize;
}
}
OpenALFunc OpenAL::GetEntry(const String& entryPoint)
{
return LoadEntry(entryPoint.GetConstBuffer(), false);
}
String OpenAL::GetRendererName()
{
return s_rendererName;
}
String OpenAL::GetVendorName()
{
return s_vendorName;
}
unsigned int OpenAL::GetVersion()
{
return s_version;
}
bool OpenAL::Initialize(bool openDevice)
{
if (s_library.IsLoaded())
return true;
#if defined(NAZARA_PLATFORM_WINDOWS)
///FIXME: Est-ce qu'OpenAL Soft est une meilleure implémentation que Creative ?
/// Si on pouvait se résigner à utiliser OpenAL Soft tout le temps, cela nous permettrait d'utiliser les extensions sonores
/// et de donner plus de possibilités techniques au niveau de l'audio.
const char* libs[] = {
"soft_oal.dll",
"wrap_oal.dll",
"openal32.dll"
};
#elif defined(NAZARA_PLATFORM_LINUX)
const char* libs[] = {
"libopenal.so.1",
"libopenal.so.0",
"libopenal.so"
};
//#elif defined(NAZARA_PLATFORM_MACOSX)
#else
NazaraError("Unknown OS");
return false;
#endif
bool succeeded = false;
for (const char* path : libs)
{
String libPath(path);
if (!s_library.Load(libPath))
continue;
try
{
// al
alBuffer3f = reinterpret_cast<OpenALDetail::LPALBUFFER3F>(LoadEntry("alBuffer3f"));
alBuffer3i = reinterpret_cast<OpenALDetail::LPALBUFFER3I>(LoadEntry("alBuffer3i"));
alBufferData = reinterpret_cast<OpenALDetail::LPALBUFFERDATA>(LoadEntry("alBufferData"));
alBufferf = reinterpret_cast<OpenALDetail::LPALBUFFERF>(LoadEntry("alBufferf"));
alBufferfv = reinterpret_cast<OpenALDetail::LPALBUFFERFV>(LoadEntry("alBufferfv"));
alBufferi = reinterpret_cast<OpenALDetail::LPALBUFFERI>(LoadEntry("alBufferi"));
alBufferiv = reinterpret_cast<OpenALDetail::LPALBUFFERIV>(LoadEntry("alBufferiv"));
alDeleteBuffers = reinterpret_cast<OpenALDetail::LPALDELETEBUFFERS>(LoadEntry("alDeleteBuffers"));
alDeleteSources = reinterpret_cast<OpenALDetail::LPALDELETESOURCES>(LoadEntry("alDeleteSources"));
alDisable = reinterpret_cast<OpenALDetail::LPALDISABLE>(LoadEntry("alDisable"));
alDistanceModel = reinterpret_cast<OpenALDetail::LPALDISTANCEMODEL>(LoadEntry("alDistanceModel"));
alDopplerFactor = reinterpret_cast<OpenALDetail::LPALDOPPLERFACTOR>(LoadEntry("alDopplerFactor"));
alDopplerVelocity = reinterpret_cast<OpenALDetail::LPALDOPPLERVELOCITY>(LoadEntry("alDopplerVelocity"));
alEnable = reinterpret_cast<OpenALDetail::LPALENABLE>(LoadEntry("alEnable"));
alGenBuffers = reinterpret_cast<OpenALDetail::LPALGENBUFFERS>(LoadEntry("alGenBuffers"));
alGenSources = reinterpret_cast<OpenALDetail::LPALGENSOURCES>(LoadEntry("alGenSources"));
alGetBoolean = reinterpret_cast<OpenALDetail::LPALGETBOOLEAN>(LoadEntry("alGetBoolean"));
alGetBooleanv = reinterpret_cast<OpenALDetail::LPALGETBOOLEANV>(LoadEntry("alGetBooleanv"));
alGetBuffer3f = reinterpret_cast<OpenALDetail::LPALGETBUFFER3F>(LoadEntry("alGetBuffer3f"));
alGetBuffer3i = reinterpret_cast<OpenALDetail::LPALGETBUFFER3I>(LoadEntry("alGetBuffer3i"));
alGetBufferf = reinterpret_cast<OpenALDetail::LPALGETBUFFERF>(LoadEntry("alGetBufferf"));
alGetBufferfv = reinterpret_cast<OpenALDetail::LPALGETBUFFERFV>(LoadEntry("alGetBufferfv"));
alGetBufferi = reinterpret_cast<OpenALDetail::LPALGETBUFFERI>(LoadEntry("alGetBufferi"));
alGetBufferiv = reinterpret_cast<OpenALDetail::LPALGETBUFFERIV>(LoadEntry("alGetBufferiv"));
alGetDouble = reinterpret_cast<OpenALDetail::LPALGETDOUBLE>(LoadEntry("alGetDouble"));
alGetDoublev = reinterpret_cast<OpenALDetail::LPALGETDOUBLEV>(LoadEntry("alGetDoublev"));
alGetEnumValue = reinterpret_cast<OpenALDetail::LPALGETENUMVALUE>(LoadEntry("alGetEnumValue"));
alGetError = reinterpret_cast<OpenALDetail::LPALGETERROR>(LoadEntry("alGetError"));
alGetFloat = reinterpret_cast<OpenALDetail::LPALGETFLOAT>(LoadEntry("alGetFloat"));
alGetFloatv = reinterpret_cast<OpenALDetail::LPALGETFLOATV>(LoadEntry("alGetFloatv"));
alGetInteger = reinterpret_cast<OpenALDetail::LPALGETINTEGER>(LoadEntry("alGetInteger"));
alGetIntegerv = reinterpret_cast<OpenALDetail::LPALGETINTEGERV>(LoadEntry("alGetIntegerv"));
alGetListener3f = reinterpret_cast<OpenALDetail::LPALGETLISTENER3F>(LoadEntry("alGetListener3f"));
alGetListener3i = reinterpret_cast<OpenALDetail::LPALGETLISTENER3I>(LoadEntry("alGetListener3i"));
alGetListenerf = reinterpret_cast<OpenALDetail::LPALGETLISTENERF>(LoadEntry("alGetListenerf"));
alGetListenerfv = reinterpret_cast<OpenALDetail::LPALGETLISTENERFV>(LoadEntry("alGetListenerfv"));
alGetListeneri = reinterpret_cast<OpenALDetail::LPALGETLISTENERI>(LoadEntry("alGetListeneri"));
alGetListeneriv = reinterpret_cast<OpenALDetail::LPALGETLISTENERIV>(LoadEntry("alGetListeneriv"));
alGetProcAddress = reinterpret_cast<OpenALDetail::LPALGETPROCADDRESS>(LoadEntry("alGetProcAddress"));
alGetSource3f = reinterpret_cast<OpenALDetail::LPALGETSOURCE3F>(LoadEntry("alGetSource3f"));
alGetSource3i = reinterpret_cast<OpenALDetail::LPALGETSOURCE3I>(LoadEntry("alGetSource3i"));
alGetSourcef = reinterpret_cast<OpenALDetail::LPALGETSOURCEF>(LoadEntry("alGetSourcef"));
alGetSourcefv = reinterpret_cast<OpenALDetail::LPALGETSOURCEFV>(LoadEntry("alGetSourcefv"));
alGetSourcei = reinterpret_cast<OpenALDetail::LPALGETSOURCEI>(LoadEntry("alGetSourcei"));
alGetSourceiv = reinterpret_cast<OpenALDetail::LPALGETSOURCEIV>(LoadEntry("alGetSourceiv"));
alGetString = reinterpret_cast<OpenALDetail::LPALGETSTRING>(LoadEntry("alGetString"));
alIsBuffer = reinterpret_cast<OpenALDetail::LPALISBUFFER>(LoadEntry("alIsBuffer"));
alIsEnabled = reinterpret_cast<OpenALDetail::LPALISENABLED>(LoadEntry("alIsEnabled"));
alIsExtensionPresent = reinterpret_cast<OpenALDetail::LPALISEXTENSIONPRESENT>(LoadEntry("alIsExtensionPresent"));
alIsSource = reinterpret_cast<OpenALDetail::LPALISSOURCE>(LoadEntry("alIsSource"));
alListener3f = reinterpret_cast<OpenALDetail::LPALLISTENER3F>(LoadEntry("alListener3f"));
alListener3i = reinterpret_cast<OpenALDetail::LPALLISTENER3I>(LoadEntry("alListener3i"));
alListenerf = reinterpret_cast<OpenALDetail::LPALLISTENERF>(LoadEntry("alListenerf"));
alListenerfv = reinterpret_cast<OpenALDetail::LPALLISTENERFV>(LoadEntry("alListenerfv"));
alListeneri = reinterpret_cast<OpenALDetail::LPALLISTENERI>(LoadEntry("alListeneri"));
alListeneriv = reinterpret_cast<OpenALDetail::LPALLISTENERIV>(LoadEntry("alListeneriv"));
alSource3f = reinterpret_cast<OpenALDetail::LPALSOURCE3F>(LoadEntry("alSource3f"));
alSource3i = reinterpret_cast<OpenALDetail::LPALSOURCE3I>(LoadEntry("alSource3i"));
alSourcef = reinterpret_cast<OpenALDetail::LPALSOURCEF>(LoadEntry("alSourcef"));
alSourcefv = reinterpret_cast<OpenALDetail::LPALSOURCEFV>(LoadEntry("alSourcefv"));
alSourcei = reinterpret_cast<OpenALDetail::LPALSOURCEI>(LoadEntry("alSourcei"));
alSourceiv = reinterpret_cast<OpenALDetail::LPALSOURCEIV>(LoadEntry("alSourceiv"));
alSourcePause = reinterpret_cast<OpenALDetail::LPALSOURCEPAUSE>(LoadEntry("alSourcePause"));
alSourcePausev = reinterpret_cast<OpenALDetail::LPALSOURCEPAUSEV>(LoadEntry("alSourcePausev"));
alSourcePlay = reinterpret_cast<OpenALDetail::LPALSOURCEPLAY>(LoadEntry("alSourcePlay"));
alSourcePlayv = reinterpret_cast<OpenALDetail::LPALSOURCEPLAYV>(LoadEntry("alSourcePlayv"));
alSourceQueueBuffers = reinterpret_cast<OpenALDetail::LPALSOURCEQUEUEBUFFERS>(LoadEntry("alSourceQueueBuffers"));
alSourceRewind = reinterpret_cast<OpenALDetail::LPALSOURCEREWIND>(LoadEntry("alSourceRewind"));
alSourceRewindv = reinterpret_cast<OpenALDetail::LPALSOURCEREWINDV>(LoadEntry("alSourceRewindv"));
alSourceStop = reinterpret_cast<OpenALDetail::LPALSOURCESTOP>(LoadEntry("alSourceStop"));
alSourceStopv = reinterpret_cast<OpenALDetail::LPALSOURCESTOPV>(LoadEntry("alSourceStopv"));
alSourceUnqueueBuffers = reinterpret_cast<OpenALDetail::LPALSOURCEUNQUEUEBUFFERS>(LoadEntry("alSourceUnqueueBuffers"));
alSpeedOfSound = reinterpret_cast<OpenALDetail::LPALSPEEDOFSOUND>(LoadEntry("alSpeedOfSound"));
// alc
alcCaptureCloseDevice = reinterpret_cast<OpenALDetail::LPALCCAPTURECLOSEDEVICE>(LoadEntry("alcCaptureCloseDevice"));
alcCaptureOpenDevice = reinterpret_cast<OpenALDetail::LPALCCAPTUREOPENDEVICE>(LoadEntry("alcCaptureOpenDevice"));
alcCaptureSamples = reinterpret_cast<OpenALDetail::LPALCCAPTURESAMPLES>(LoadEntry("alcCaptureSamples"));
alcCaptureStart = reinterpret_cast<OpenALDetail::LPALCCAPTURESTART>(LoadEntry("alcCaptureStart"));
alcCaptureStop = reinterpret_cast<OpenALDetail::LPALCCAPTURESTOP>(LoadEntry("alcCaptureStop"));
alcCloseDevice = reinterpret_cast<OpenALDetail::LPALCCLOSEDEVICE>(LoadEntry("alcCloseDevice"));
alcCreateContext = reinterpret_cast<OpenALDetail::LPALCCREATECONTEXT>(LoadEntry("alcCreateContext"));
alcDestroyContext = reinterpret_cast<OpenALDetail::LPALCDESTROYCONTEXT>(LoadEntry("alcDestroyContext"));
alcGetContextsDevice = reinterpret_cast<OpenALDetail::LPALCGETCONTEXTSDEVICE>(LoadEntry("alcGetContextsDevice"));
alcGetCurrentContext = reinterpret_cast<OpenALDetail::LPALCGETCURRENTCONTEXT>(LoadEntry("alcGetCurrentContext"));
alcGetEnumValue = reinterpret_cast<OpenALDetail::LPALCGETENUMVALUE>(LoadEntry("alcGetEnumValue"));
alcGetError = reinterpret_cast<OpenALDetail::LPALCGETERROR>(LoadEntry("alcGetError"));
alcGetIntegerv = reinterpret_cast<OpenALDetail::LPALCGETINTEGERV>(LoadEntry("alcGetIntegerv"));
alcGetProcAddress = reinterpret_cast<OpenALDetail::LPALCGETPROCADDRESS>(LoadEntry("alcGetProcAddress"));
alcGetString = reinterpret_cast<OpenALDetail::LPALCGETSTRING>(LoadEntry("alcGetString"));
alcIsExtensionPresent = reinterpret_cast<OpenALDetail::LPALCISEXTENSIONPRESENT>(LoadEntry("alcIsExtensionPresent"));
alcMakeContextCurrent = reinterpret_cast<OpenALDetail::LPALCMAKECONTEXTCURRENT>(LoadEntry("alcMakeContextCurrent"));
alcOpenDevice = reinterpret_cast<OpenALDetail::LPALCOPENDEVICE>(LoadEntry("alcOpenDevice"));
alcProcessContext = reinterpret_cast<OpenALDetail::LPALCPROCESSCONTEXT>(LoadEntry("alcProcessContext"));
alcSuspendContext = reinterpret_cast<OpenALDetail::LPALCSUSPENDCONTEXT>(LoadEntry("alcSuspendContext"));
succeeded = true;
break;
}
catch (const std::exception& e)
{
NazaraWarning(libPath + " loading failed: " + String(e.what()));
continue;
}
}
if (!succeeded)
{
NazaraError("Failed to load OpenAL");
Uninitialize();
return false;
}
if (openDevice)
OpenDevice();
return true;
}
bool OpenAL::IsInitialized()
{
return s_library.IsLoaded();
}
std::size_t OpenAL::QueryInputDevices(std::vector<String>& devices)
{
const char* deviceString = reinterpret_cast<const char*>(alcGetString(nullptr, ALC_CAPTURE_DEVICE_SPECIFIER));
if (!deviceString)
return 0;
return ParseDevices(deviceString, devices);
}
std::size_t OpenAL::QueryOutputDevices(std::vector<String>& devices)
{
const char* deviceString = reinterpret_cast<const char*>(alcGetString(nullptr, ALC_ALL_DEVICES_SPECIFIER));
if (!deviceString)
return 0;
return ParseDevices(deviceString, devices);
}
bool OpenAL::SetDevice(const String& deviceName)
{
s_deviceName = deviceName;
if (IsInitialized())
{
CloseDevice();
return OpenDevice();
}
else
return true;
}
void OpenAL::Uninitialize()
{
CloseDevice();
s_rendererName.Clear(false);
s_vendorName.Clear(false);
s_library.Unload();
}
///ATTENTION: La valeur entière est le nombre de canaux possédés par ce format
ALenum OpenAL::AudioFormat[AudioFormat_Max+1] = {0}; // Valeur ajoutées au chargement d'OpenAL
void OpenAL::CloseDevice()
{
if (s_device)
{
if (s_context)
{
alcMakeContextCurrent(nullptr);
alcDestroyContext(s_context);
s_context = nullptr;
}
if (!alcCloseDevice(s_device))
// Nous n'avons pas pu fermer le device, ce qui signifie qu'il est en cours d'utilisation
NazaraWarning("Failed to close device");
s_device = nullptr;
}
}
bool OpenAL::OpenDevice()
{
// Initialisation du module
s_device = alcOpenDevice(s_deviceName.IsEmpty() ? nullptr : s_deviceName.GetConstBuffer()); // On choisit le device par défaut
if (!s_device)
{
NazaraError("Failed to open default device");
return false;
}
// Un seul contexte nous suffira
s_context = alcCreateContext(s_device, nullptr);
if (!s_context)
{
NazaraError("Failed to create context");
return false;
}
if (!alcMakeContextCurrent(s_context))
{
NazaraError("Failed to activate context");
return false;
}
s_rendererName = reinterpret_cast<const char*>(alGetString(AL_RENDERER));
s_vendorName = reinterpret_cast<const char*>(alGetString(AL_VENDOR));
const ALchar* version = alGetString(AL_VERSION);
if (version)
{
unsigned int major = version[0] - '0';
unsigned int minor = version[2] - '0';
if (major != 0 && major <= 9)
{
if (minor > 9)
{
NazaraWarning("Unable to retrieve OpenAL minor version (using 0)");
minor = 0;
}
s_version = major*100 + minor*10;
NazaraDebug("OpenAL version: " + String::Number(major) + '.' + String::Number(minor));
}
else
{
NazaraDebug("Unable to retrieve OpenAL major version");
s_version = 0;
}
}
else
{
NazaraDebug("Unable to retrieve OpenAL version");
s_version = 0;
}
// On complète le tableau de formats
AudioFormat[AudioFormat_Mono] = AL_FORMAT_MONO16;
AudioFormat[AudioFormat_Stereo] = AL_FORMAT_STEREO16;
// "The presence of an enum value does not guarantee the applicability of an extension to the current context."
if (alIsExtensionPresent("AL_EXT_MCFORMATS"))
{
AudioFormat[AudioFormat_Quad] = alGetEnumValue("AL_FORMAT_QUAD16");
AudioFormat[AudioFormat_5_1] = alGetEnumValue("AL_FORMAT_51CHN16");
AudioFormat[AudioFormat_6_1] = alGetEnumValue("AL_FORMAT_61CHN16");
AudioFormat[AudioFormat_7_1] = alGetEnumValue("AL_FORMAT_71CHN16");
}
else if (alIsExtensionPresent("AL_LOKI_quadriphonic"))
AudioFormat[AudioFormat_Quad] = alGetEnumValue("AL_FORMAT_QUAD16_LOKI");
return true;
}
OpenALFunc OpenAL::LoadEntry(const char* name, bool throwException)
{
OpenALFunc entry = reinterpret_cast<OpenALFunc>(s_library.GetSymbol(name));
if (!entry && throwException)
{
std::ostringstream oss;
oss << "failed to load \"" << name << '"';
throw std::runtime_error(oss.str());
}
return entry;
}
// al
OpenALDetail::LPALBUFFER3F alBuffer3f = nullptr;
OpenALDetail::LPALBUFFER3I alBuffer3i = nullptr;
OpenALDetail::LPALBUFFERDATA alBufferData = nullptr;
OpenALDetail::LPALBUFFERF alBufferf = nullptr;
OpenALDetail::LPALBUFFERFV alBufferfv = nullptr;
OpenALDetail::LPALBUFFERI alBufferi = nullptr;
OpenALDetail::LPALBUFFERIV alBufferiv = nullptr;
OpenALDetail::LPALDELETEBUFFERS alDeleteBuffers = nullptr;
OpenALDetail::LPALDELETESOURCES alDeleteSources = nullptr;
OpenALDetail::LPALDISABLE alDisable = nullptr;
OpenALDetail::LPALDISTANCEMODEL alDistanceModel = nullptr;
OpenALDetail::LPALDOPPLERFACTOR alDopplerFactor = nullptr;
OpenALDetail::LPALDOPPLERVELOCITY alDopplerVelocity = nullptr;
OpenALDetail::LPALENABLE alEnable = nullptr;
OpenALDetail::LPALGENBUFFERS alGenBuffers = nullptr;
OpenALDetail::LPALGENSOURCES alGenSources = nullptr;
OpenALDetail::LPALGETBOOLEAN alGetBoolean = nullptr;
OpenALDetail::LPALGETBOOLEANV alGetBooleanv = nullptr;
OpenALDetail::LPALGETBUFFER3F alGetBuffer3f = nullptr;
OpenALDetail::LPALGETBUFFER3I alGetBuffer3i = nullptr;
OpenALDetail::LPALGETBUFFERF alGetBufferf = nullptr;
OpenALDetail::LPALGETBUFFERFV alGetBufferfv = nullptr;
OpenALDetail::LPALGETBUFFERI alGetBufferi = nullptr;
OpenALDetail::LPALGETBUFFERIV alGetBufferiv = nullptr;
OpenALDetail::LPALGETDOUBLE alGetDouble = nullptr;
OpenALDetail::LPALGETDOUBLEV alGetDoublev = nullptr;
OpenALDetail::LPALGETENUMVALUE alGetEnumValue = nullptr;
OpenALDetail::LPALGETERROR alGetError = nullptr;
OpenALDetail::LPALGETFLOAT alGetFloat = nullptr;
OpenALDetail::LPALGETFLOATV alGetFloatv = nullptr;
OpenALDetail::LPALGETINTEGER alGetInteger = nullptr;
OpenALDetail::LPALGETINTEGERV alGetIntegerv = nullptr;
OpenALDetail::LPALGETLISTENER3F alGetListener3f = nullptr;
OpenALDetail::LPALGETLISTENER3I alGetListener3i = nullptr;
OpenALDetail::LPALGETLISTENERF alGetListenerf = nullptr;
OpenALDetail::LPALGETLISTENERFV alGetListenerfv = nullptr;
OpenALDetail::LPALGETLISTENERI alGetListeneri = nullptr;
OpenALDetail::LPALGETLISTENERIV alGetListeneriv = nullptr;
OpenALDetail::LPALGETPROCADDRESS alGetProcAddress = nullptr;
OpenALDetail::LPALGETSOURCE3F alGetSource3f = nullptr;
OpenALDetail::LPALGETSOURCE3I alGetSource3i = nullptr;
OpenALDetail::LPALGETSOURCEF alGetSourcef = nullptr;
OpenALDetail::LPALGETSOURCEFV alGetSourcefv = nullptr;
OpenALDetail::LPALGETSOURCEI alGetSourcei = nullptr;
OpenALDetail::LPALGETSOURCEIV alGetSourceiv = nullptr;
OpenALDetail::LPALGETSTRING alGetString = nullptr;
OpenALDetail::LPALISBUFFER alIsBuffer = nullptr;
OpenALDetail::LPALISENABLED alIsEnabled = nullptr;
OpenALDetail::LPALISEXTENSIONPRESENT alIsExtensionPresent = nullptr;
OpenALDetail::LPALISSOURCE alIsSource = nullptr;
OpenALDetail::LPALLISTENER3F alListener3f = nullptr;
OpenALDetail::LPALLISTENER3I alListener3i = nullptr;
OpenALDetail::LPALLISTENERF alListenerf = nullptr;
OpenALDetail::LPALLISTENERFV alListenerfv = nullptr;
OpenALDetail::LPALLISTENERI alListeneri = nullptr;
OpenALDetail::LPALLISTENERIV alListeneriv = nullptr;
OpenALDetail::LPALSOURCE3F alSource3f = nullptr;
OpenALDetail::LPALSOURCE3I alSource3i = nullptr;
OpenALDetail::LPALSOURCEF alSourcef = nullptr;
OpenALDetail::LPALSOURCEFV alSourcefv = nullptr;
OpenALDetail::LPALSOURCEI alSourcei = nullptr;
OpenALDetail::LPALSOURCEIV alSourceiv = nullptr;
OpenALDetail::LPALSOURCEPAUSE alSourcePause = nullptr;
OpenALDetail::LPALSOURCEPAUSEV alSourcePausev = nullptr;
OpenALDetail::LPALSOURCEPLAY alSourcePlay = nullptr;
OpenALDetail::LPALSOURCEPLAYV alSourcePlayv = nullptr;
OpenALDetail::LPALSOURCEQUEUEBUFFERS alSourceQueueBuffers = nullptr;
OpenALDetail::LPALSOURCEREWIND alSourceRewind = nullptr;
OpenALDetail::LPALSOURCEREWINDV alSourceRewindv = nullptr;
OpenALDetail::LPALSOURCESTOP alSourceStop = nullptr;
OpenALDetail::LPALSOURCESTOPV alSourceStopv = nullptr;
OpenALDetail::LPALSOURCEUNQUEUEBUFFERS alSourceUnqueueBuffers = nullptr;
OpenALDetail::LPALSPEEDOFSOUND alSpeedOfSound = nullptr;
// alc
OpenALDetail::LPALCCAPTURECLOSEDEVICE alcCaptureCloseDevice = nullptr;
OpenALDetail::LPALCCAPTUREOPENDEVICE alcCaptureOpenDevice = nullptr;
OpenALDetail::LPALCCAPTURESAMPLES alcCaptureSamples = nullptr;
OpenALDetail::LPALCCAPTURESTART alcCaptureStart = nullptr;
OpenALDetail::LPALCCAPTURESTOP alcCaptureStop = nullptr;
OpenALDetail::LPALCCLOSEDEVICE alcCloseDevice = nullptr;
OpenALDetail::LPALCCREATECONTEXT alcCreateContext = nullptr;
OpenALDetail::LPALCDESTROYCONTEXT alcDestroyContext = nullptr;
OpenALDetail::LPALCGETCONTEXTSDEVICE alcGetContextsDevice = nullptr;
OpenALDetail::LPALCGETCURRENTCONTEXT alcGetCurrentContext = nullptr;
OpenALDetail::LPALCGETENUMVALUE alcGetEnumValue = nullptr;
OpenALDetail::LPALCGETERROR alcGetError = nullptr;
OpenALDetail::LPALCGETINTEGERV alcGetIntegerv = nullptr;
OpenALDetail::LPALCGETPROCADDRESS alcGetProcAddress = nullptr;
OpenALDetail::LPALCGETSTRING alcGetString = nullptr;
OpenALDetail::LPALCISEXTENSIONPRESENT alcIsExtensionPresent = nullptr;
OpenALDetail::LPALCMAKECONTEXTCURRENT alcMakeContextCurrent = nullptr;
OpenALDetail::LPALCOPENDEVICE alcOpenDevice = nullptr;
OpenALDetail::LPALCPROCESSCONTEXT alcProcessContext = nullptr;
OpenALDetail::LPALCSUSPENDCONTEXT alcSuspendContext = nullptr;
}