antkeeper
/
superbuild
1
0
Fork 0
Code Issues 0 Pull Requests 0 Releases 0 Activity
🛠️🐜 Antkeeper superbuild with dependencies included https://antkeeper.com
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
58 Commits
1 Branch
60 MiB
 
 
 
 
 
 
Tree: ba3f736a1c
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'ba3f736a1c'
${ noResults }
superbuild/modules/openal-soft/OpenAL32/alState.cpp

849 lines
22 KiB
Raw Blame History

/**
* OpenAL cross platform audio library
* Copyright (C) 1999-2000 by authors.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
* Or go to http://www.gnu.org/copyleft/lgpl.html
*/
#include "config.h"
#include "version.h"
#include <stdlib.h>
#include <cmath>
#include "alMain.h"
#include "alcontext.h"
#include "alu.h"
#include "alError.h"
#include "alexcpt.h"
#include "backends/base.h"
namespace {
constexpr ALchar alVendor[] = "OpenAL Community";
constexpr ALchar alVersion[] = "1.1 ALSOFT " ALSOFT_VERSION;
constexpr ALchar alRenderer[] = "OpenAL Soft";
// Error Messages
constexpr ALchar alNoError[] = "No Error";
constexpr ALchar alErrInvalidName[] = "Invalid Name";
constexpr ALchar alErrInvalidEnum[] = "Invalid Enum";
constexpr ALchar alErrInvalidValue[] = "Invalid Value";
constexpr ALchar alErrInvalidOp[] = "Invalid Operation";
constexpr ALchar alErrOutOfMemory[] = "Out of Memory";
/* Resampler strings */
constexpr ALchar alPointResampler[] = "Nearest";
constexpr ALchar alLinearResampler[] = "Linear";
constexpr ALchar alCubicResampler[] = "Cubic";
constexpr ALchar alBSinc12Resampler[] = "11th order Sinc";
constexpr ALchar alBSinc24Resampler[] = "23rd order Sinc";
} // namespace
/* WARNING: Non-standard export! Not part of any extension, or exposed in the
* alcFunctions list.
*/
extern "C" AL_API const ALchar* AL_APIENTRY alsoft_get_version(void)
START_API_FUNC
{
const char *spoof{getenv("ALSOFT_SPOOF_VERSION")};
if(spoof && spoof[0] != '\0') return spoof;
return ALSOFT_VERSION;
}
END_API_FUNC
#define DO_UPDATEPROPS() do { \
if(!context->DeferUpdates.load(std::memory_order_acquire)) \
UpdateContextProps(context.get()); \
else \
context->PropsClean.clear(std::memory_order_release); \
} while(0)
AL_API ALvoid AL_APIENTRY alEnable(ALenum capability)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
std::lock_guard<std::mutex> _{context->PropLock};
switch(capability)
{
case AL_SOURCE_DISTANCE_MODEL:
context->SourceDistanceModel = AL_TRUE;
DO_UPDATEPROPS();
break;
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid enable property 0x%04x", capability);
}
}
END_API_FUNC
AL_API ALvoid AL_APIENTRY alDisable(ALenum capability)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
std::lock_guard<std::mutex> _{context->PropLock};
switch(capability)
{
case AL_SOURCE_DISTANCE_MODEL:
context->SourceDistanceModel = AL_FALSE;
DO_UPDATEPROPS();
break;
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid disable property 0x%04x", capability);
}
}
END_API_FUNC
AL_API ALboolean AL_APIENTRY alIsEnabled(ALenum capability)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return AL_FALSE;
std::lock_guard<std::mutex> _{context->PropLock};
ALboolean value{AL_FALSE};
switch(capability)
{
case AL_SOURCE_DISTANCE_MODEL:
value = context->SourceDistanceModel;
break;
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid is enabled property 0x%04x", capability);
}
return value;
}
END_API_FUNC
AL_API ALboolean AL_APIENTRY alGetBoolean(ALenum pname)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return AL_FALSE;
std::lock_guard<std::mutex> _{context->PropLock};
ALboolean value{AL_FALSE};
switch(pname)
{
case AL_DOPPLER_FACTOR:
if(context->DopplerFactor != 0.0f)
value = AL_TRUE;
break;
case AL_DOPPLER_VELOCITY:
if(context->DopplerVelocity != 0.0f)
value = AL_TRUE;
break;
case AL_DISTANCE_MODEL:
if(context->mDistanceModel == DistanceModel::Default)
value = AL_TRUE;
break;
case AL_SPEED_OF_SOUND:
if(context->SpeedOfSound != 0.0f)
value = AL_TRUE;
break;
case AL_DEFERRED_UPDATES_SOFT:
if(context->DeferUpdates.load(std::memory_order_acquire))
value = AL_TRUE;
break;
case AL_GAIN_LIMIT_SOFT:
if(GAIN_MIX_MAX/context->GainBoost != 0.0f)
value = AL_TRUE;
break;
case AL_NUM_RESAMPLERS_SOFT:
/* Always non-0. */
value = AL_TRUE;
break;
case AL_DEFAULT_RESAMPLER_SOFT:
value = ResamplerDefault ? AL_TRUE : AL_FALSE;
break;
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid boolean property 0x%04x", pname);
}
return value;
}
END_API_FUNC
AL_API ALdouble AL_APIENTRY alGetDouble(ALenum pname)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return 0.0;
std::lock_guard<std::mutex> _{context->PropLock};
ALdouble value{0.0};
switch(pname)
{
case AL_DOPPLER_FACTOR:
value = static_cast<ALdouble>(context->DopplerFactor);
break;
case AL_DOPPLER_VELOCITY:
value = static_cast<ALdouble>(context->DopplerVelocity);
break;
case AL_DISTANCE_MODEL:
value = static_cast<ALdouble>(context->mDistanceModel);
break;
case AL_SPEED_OF_SOUND:
value = static_cast<ALdouble>(context->SpeedOfSound);
break;
case AL_DEFERRED_UPDATES_SOFT:
if(context->DeferUpdates.load(std::memory_order_acquire))
value = static_cast<ALdouble>(AL_TRUE);
break;
case AL_GAIN_LIMIT_SOFT:
value = static_cast<ALdouble>GAIN_MIX_MAX/context->GainBoost;
break;
case AL_NUM_RESAMPLERS_SOFT:
value = static_cast<ALdouble>(ResamplerMax + 1);
break;
case AL_DEFAULT_RESAMPLER_SOFT:
value = static_cast<ALdouble>(ResamplerDefault);
break;
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid double property 0x%04x", pname);
}
return value;
}
END_API_FUNC
AL_API ALfloat AL_APIENTRY alGetFloat(ALenum pname)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return 0.0f;
std::lock_guard<std::mutex> _{context->PropLock};
ALfloat value{0.0f};
switch(pname)
{
case AL_DOPPLER_FACTOR:
value = context->DopplerFactor;
break;
case AL_DOPPLER_VELOCITY:
value = context->DopplerVelocity;
break;
case AL_DISTANCE_MODEL:
value = static_cast<ALfloat>(context->mDistanceModel);
break;
case AL_SPEED_OF_SOUND:
value = context->SpeedOfSound;
break;
case AL_DEFERRED_UPDATES_SOFT:
if(context->DeferUpdates.load(std::memory_order_acquire))
value = static_cast<ALfloat>(AL_TRUE);
break;
case AL_GAIN_LIMIT_SOFT:
value = GAIN_MIX_MAX/context->GainBoost;
break;
case AL_NUM_RESAMPLERS_SOFT:
value = static_cast<ALfloat>(ResamplerMax + 1);
break;
case AL_DEFAULT_RESAMPLER_SOFT:
value = static_cast<ALfloat>(ResamplerDefault);
break;
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid float property 0x%04x", pname);
}
return value;
}
END_API_FUNC
AL_API ALint AL_APIENTRY alGetInteger(ALenum pname)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return 0;
std::lock_guard<std::mutex> _{context->PropLock};
ALint value{0};
switch(pname)
{
case AL_DOPPLER_FACTOR:
value = static_cast<ALint>(context->DopplerFactor);
break;
case AL_DOPPLER_VELOCITY:
value = static_cast<ALint>(context->DopplerVelocity);
break;
case AL_DISTANCE_MODEL:
value = static_cast<ALint>(context->mDistanceModel);
break;
case AL_SPEED_OF_SOUND:
value = static_cast<ALint>(context->SpeedOfSound);
break;
case AL_DEFERRED_UPDATES_SOFT:
if(context->DeferUpdates.load(std::memory_order_acquire))
value = static_cast<ALint>(AL_TRUE);
break;
case AL_GAIN_LIMIT_SOFT:
value = static_cast<ALint>(GAIN_MIX_MAX/context->GainBoost);
break;
case AL_NUM_RESAMPLERS_SOFT:
value = ResamplerMax + 1;
break;
case AL_DEFAULT_RESAMPLER_SOFT:
value = ResamplerDefault;
break;
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid integer property 0x%04x", pname);
}
return value;
}
END_API_FUNC
extern "C" AL_API ALint64SOFT AL_APIENTRY alGetInteger64SOFT(ALenum pname)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return 0;
std::lock_guard<std::mutex> _{context->PropLock};
ALint64SOFT value{0};
switch(pname)
{
case AL_DOPPLER_FACTOR:
value = (ALint64SOFT)context->DopplerFactor;
break;
case AL_DOPPLER_VELOCITY:
value = (ALint64SOFT)context->DopplerVelocity;
break;
case AL_DISTANCE_MODEL:
value = (ALint64SOFT)context->mDistanceModel;
break;
case AL_SPEED_OF_SOUND:
value = (ALint64SOFT)context->SpeedOfSound;
break;
case AL_DEFERRED_UPDATES_SOFT:
if(context->DeferUpdates.load(std::memory_order_acquire))
value = (ALint64SOFT)AL_TRUE;
break;
case AL_GAIN_LIMIT_SOFT:
value = (ALint64SOFT)(GAIN_MIX_MAX/context->GainBoost);
break;
case AL_NUM_RESAMPLERS_SOFT:
value = (ALint64SOFT)(ResamplerMax + 1);
break;
case AL_DEFAULT_RESAMPLER_SOFT:
value = (ALint64SOFT)ResamplerDefault;
break;
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid integer64 property 0x%04x", pname);
}
return value;
}
END_API_FUNC
AL_API void* AL_APIENTRY alGetPointerSOFT(ALenum pname)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return nullptr;
std::lock_guard<std::mutex> _{context->PropLock};
void *value{nullptr};
switch(pname)
{
case AL_EVENT_CALLBACK_FUNCTION_SOFT:
value = reinterpret_cast<void*>(context->EventCb);
break;
case AL_EVENT_CALLBACK_USER_PARAM_SOFT:
value = context->EventParam;
break;
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid pointer property 0x%04x", pname);
}
return value;
}
END_API_FUNC
AL_API ALvoid AL_APIENTRY alGetBooleanv(ALenum pname, ALboolean *values)
START_API_FUNC
{
if(values)
{
switch(pname)
{
case AL_DOPPLER_FACTOR:
case AL_DOPPLER_VELOCITY:
case AL_DISTANCE_MODEL:
case AL_SPEED_OF_SOUND:
case AL_DEFERRED_UPDATES_SOFT:
case AL_GAIN_LIMIT_SOFT:
case AL_NUM_RESAMPLERS_SOFT:
case AL_DEFAULT_RESAMPLER_SOFT:
values[0] = alGetBoolean(pname);
return;
}
}
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
if(!values)
alSetError(context.get(), AL_INVALID_VALUE, "NULL pointer");
else switch(pname)
{
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid boolean-vector property 0x%04x", pname);
}
}
END_API_FUNC
AL_API ALvoid AL_APIENTRY alGetDoublev(ALenum pname, ALdouble *values)
START_API_FUNC
{
if(values)
{
switch(pname)
{
case AL_DOPPLER_FACTOR:
case AL_DOPPLER_VELOCITY:
case AL_DISTANCE_MODEL:
case AL_SPEED_OF_SOUND:
case AL_DEFERRED_UPDATES_SOFT:
case AL_GAIN_LIMIT_SOFT:
case AL_NUM_RESAMPLERS_SOFT:
case AL_DEFAULT_RESAMPLER_SOFT:
values[0] = alGetDouble(pname);
return;
}
}
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
if(!values)
alSetError(context.get(), AL_INVALID_VALUE, "NULL pointer");
else switch(pname)
{
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid double-vector property 0x%04x", pname);
}
}
END_API_FUNC
AL_API ALvoid AL_APIENTRY alGetFloatv(ALenum pname, ALfloat *values)
START_API_FUNC
{
if(values)
{
switch(pname)
{
case AL_DOPPLER_FACTOR:
case AL_DOPPLER_VELOCITY:
case AL_DISTANCE_MODEL:
case AL_SPEED_OF_SOUND:
case AL_DEFERRED_UPDATES_SOFT:
case AL_GAIN_LIMIT_SOFT:
case AL_NUM_RESAMPLERS_SOFT:
case AL_DEFAULT_RESAMPLER_SOFT:
values[0] = alGetFloat(pname);
return;
}
}
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
if(!values)
alSetError(context.get(), AL_INVALID_VALUE, "NULL pointer");
else switch(pname)
{
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid float-vector property 0x%04x", pname);
}
}
END_API_FUNC
AL_API ALvoid AL_APIENTRY alGetIntegerv(ALenum pname, ALint *values)
START_API_FUNC
{
if(values)
{
switch(pname)
{
case AL_DOPPLER_FACTOR:
case AL_DOPPLER_VELOCITY:
case AL_DISTANCE_MODEL:
case AL_SPEED_OF_SOUND:
case AL_DEFERRED_UPDATES_SOFT:
case AL_GAIN_LIMIT_SOFT:
case AL_NUM_RESAMPLERS_SOFT:
case AL_DEFAULT_RESAMPLER_SOFT:
values[0] = alGetInteger(pname);
return;
}
}
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
if(!values)
alSetError(context.get(), AL_INVALID_VALUE, "NULL pointer");
else switch(pname)
{
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid integer-vector property 0x%04x", pname);
}
}
END_API_FUNC
extern "C" AL_API void AL_APIENTRY alGetInteger64vSOFT(ALenum pname, ALint64SOFT *values)
START_API_FUNC
{
if(values)
{
switch(pname)
{
case AL_DOPPLER_FACTOR:
case AL_DOPPLER_VELOCITY:
case AL_DISTANCE_MODEL:
case AL_SPEED_OF_SOUND:
case AL_DEFERRED_UPDATES_SOFT:
case AL_GAIN_LIMIT_SOFT:
case AL_NUM_RESAMPLERS_SOFT:
case AL_DEFAULT_RESAMPLER_SOFT:
values[0] = alGetInteger64SOFT(pname);
return;
}
}
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
if(!values)
alSetError(context.get(), AL_INVALID_VALUE, "NULL pointer");
else switch(pname)
{
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid integer64-vector property 0x%04x", pname);
}
}
END_API_FUNC
AL_API void AL_APIENTRY alGetPointervSOFT(ALenum pname, void **values)
START_API_FUNC
{
if(values)
{
switch(pname)
{
case AL_EVENT_CALLBACK_FUNCTION_SOFT:
case AL_EVENT_CALLBACK_USER_PARAM_SOFT:
values[0] = alGetPointerSOFT(pname);
return;
}
}
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
if(!values)
alSetError(context.get(), AL_INVALID_VALUE, "NULL pointer");
else switch(pname)
{
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid pointer-vector property 0x%04x", pname);
}
}
END_API_FUNC
AL_API const ALchar* AL_APIENTRY alGetString(ALenum pname)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return nullptr;
const ALchar *value{nullptr};
switch(pname)
{
case AL_VENDOR:
value = alVendor;
break;
case AL_VERSION:
value = alVersion;
break;
case AL_RENDERER:
value = alRenderer;
break;
case AL_EXTENSIONS:
value = context->ExtensionList;
break;
case AL_NO_ERROR:
value = alNoError;
break;
case AL_INVALID_NAME:
value = alErrInvalidName;
break;
case AL_INVALID_ENUM:
value = alErrInvalidEnum;
break;
case AL_INVALID_VALUE:
value = alErrInvalidValue;
break;
case AL_INVALID_OPERATION:
value = alErrInvalidOp;
break;
case AL_OUT_OF_MEMORY:
value = alErrOutOfMemory;
break;
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid string property 0x%04x", pname);
}
return value;
}
END_API_FUNC
AL_API ALvoid AL_APIENTRY alDopplerFactor(ALfloat value)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
if(!(value >= 0.0f && std::isfinite(value)))
alSetError(context.get(), AL_INVALID_VALUE, "Doppler factor %f out of range", value);
else
{
std::lock_guard<std::mutex> _{context->PropLock};
context->DopplerFactor = value;
DO_UPDATEPROPS();
}
}
END_API_FUNC
AL_API ALvoid AL_APIENTRY alDopplerVelocity(ALfloat value)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
if((context->EnabledEvts.load(std::memory_order_relaxed)&EventType_Deprecated))
{
static constexpr ALCchar msg[] =
"alDopplerVelocity is deprecated in AL1.1, use alSpeedOfSound";
const ALsizei msglen = static_cast<ALsizei>(strlen(msg));
std::lock_guard<std::mutex> _{context->EventCbLock};
ALbitfieldSOFT enabledevts{context->EnabledEvts.load(std::memory_order_relaxed)};
if((enabledevts&EventType_Deprecated) && context->EventCb)
(*context->EventCb)(AL_EVENT_TYPE_DEPRECATED_SOFT, 0, 0, msglen, msg,
context->EventParam);
}
if(!(value >= 0.0f && std::isfinite(value)))
alSetError(context.get(), AL_INVALID_VALUE, "Doppler velocity %f out of range", value);
else
{
std::lock_guard<std::mutex> _{context->PropLock};
context->DopplerVelocity = value;
DO_UPDATEPROPS();
}
}
END_API_FUNC
AL_API ALvoid AL_APIENTRY alSpeedOfSound(ALfloat value)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
if(!(value > 0.0f && std::isfinite(value)))
alSetError(context.get(), AL_INVALID_VALUE, "Speed of sound %f out of range", value);
else
{
std::lock_guard<std::mutex> _{context->PropLock};
context->SpeedOfSound = value;
DO_UPDATEPROPS();
}
}
END_API_FUNC
AL_API ALvoid AL_APIENTRY alDistanceModel(ALenum value)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
if(!(value == AL_INVERSE_DISTANCE || value == AL_INVERSE_DISTANCE_CLAMPED ||
value == AL_LINEAR_DISTANCE || value == AL_LINEAR_DISTANCE_CLAMPED ||
value == AL_EXPONENT_DISTANCE || value == AL_EXPONENT_DISTANCE_CLAMPED ||
value == AL_NONE))
alSetError(context.get(), AL_INVALID_VALUE, "Distance model 0x%04x out of range", value);
else
{
std::lock_guard<std::mutex> _{context->PropLock};
context->mDistanceModel = static_cast<DistanceModel>(value);
if(!context->SourceDistanceModel)
DO_UPDATEPROPS();
}
}
END_API_FUNC
AL_API ALvoid AL_APIENTRY alDeferUpdatesSOFT(void)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
ALCcontext_DeferUpdates(context.get());
}
END_API_FUNC
AL_API ALvoid AL_APIENTRY alProcessUpdatesSOFT(void)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
ALCcontext_ProcessUpdates(context.get());
}
END_API_FUNC
AL_API const ALchar* AL_APIENTRY alGetStringiSOFT(ALenum pname, ALsizei index)
START_API_FUNC
{
const char *ResamplerNames[] = {
alPointResampler, alLinearResampler,
alCubicResampler, alBSinc12Resampler,
alBSinc24Resampler,
};
static_assert(COUNTOF(ResamplerNames) == ResamplerMax+1, "Incorrect ResamplerNames list");
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return nullptr;
const ALchar *value{nullptr};
switch(pname)
{
case AL_RESAMPLER_NAME_SOFT:
if(index < 0 || static_cast<size_t>(index) >= COUNTOF(ResamplerNames))
alSetError(context.get(), AL_INVALID_VALUE, "Resampler name index %d out of range",
index);
else
value = ResamplerNames[index];
break;
default:
alSetError(context.get(), AL_INVALID_VALUE, "Invalid string indexed property");
}
return value;
}
END_API_FUNC
void UpdateContextProps(ALCcontext *context)
{
/* Get an unused proprty container, or allocate a new one as needed. */
ALcontextProps *props{context->FreeContextProps.load(std::memory_order_acquire)};
if(!props)
props = static_cast<ALcontextProps*>(al_calloc(16, sizeof(*props)));
else
{
ALcontextProps *next;
do {
next = props->next.load(std::memory_order_relaxed);
} while(context->FreeContextProps.compare_exchange_weak(props, next,
std::memory_order_seq_cst, std::memory_order_acquire) == 0);
}
/* Copy in current property values. */
props->MetersPerUnit = context->MetersPerUnit;
props->DopplerFactor = context->DopplerFactor;
props->DopplerVelocity = context->DopplerVelocity;
props->SpeedOfSound = context->SpeedOfSound;
props->SourceDistanceModel = context->SourceDistanceModel;
props->mDistanceModel = context->mDistanceModel;
/* Set the new container for updating internal parameters. */
props = context->Update.exchange(props, std::memory_order_acq_rel);
if(props)
{
/* If there was an unused update container, put it back in the
* freelist.
*/
AtomicReplaceHead(context->FreeContextProps, props);
}
}