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axmol/external/openal/al/state.cpp

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/**
* 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 <atomic>
#include <cmath>
#include <mutex>
#include <stdexcept>
#include <string>
#include "AL/al.h"
#include "AL/alc.h"
#include "AL/alext.h"
#include "alc/alu.h"
#include "alc/context.h"
#include "alc/inprogext.h"
#include "alnumeric.h"
#include "aloptional.h"
#include "atomic.h"
#include "core/context.h"
#include "core/except.h"
#include "core/mixer/defs.h"
#include "core/voice.h"
#include "intrusive_ptr.h"
#include "opthelpers.h"
#include "strutils.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 */
template<Resampler rtype> struct ResamplerName { };
template<> struct ResamplerName<Resampler::Point>
{ static constexpr const ALchar *Get() noexcept { return "Nearest"; } };
template<> struct ResamplerName<Resampler::Linear>
{ static constexpr const ALchar *Get() noexcept { return "Linear"; } };
template<> struct ResamplerName<Resampler::Cubic>
{ static constexpr const ALchar *Get() noexcept { return "Cubic"; } };
template<> struct ResamplerName<Resampler::FastBSinc12>
{ static constexpr const ALchar *Get() noexcept { return "11th order Sinc (fast)"; } };
template<> struct ResamplerName<Resampler::BSinc12>
{ static constexpr const ALchar *Get() noexcept { return "11th order Sinc"; } };
template<> struct ResamplerName<Resampler::FastBSinc24>
{ static constexpr const ALchar *Get() noexcept { return "23rd order Sinc (fast)"; } };
template<> struct ResamplerName<Resampler::BSinc24>
{ static constexpr const ALchar *Get() noexcept { return "23rd order Sinc"; } };
const ALchar *GetResamplerName(const Resampler rtype)
{
#define HANDLE_RESAMPLER(r) case r: return ResamplerName<r>::Get()
switch(rtype)
{
HANDLE_RESAMPLER(Resampler::Point);
HANDLE_RESAMPLER(Resampler::Linear);
HANDLE_RESAMPLER(Resampler::Cubic);
HANDLE_RESAMPLER(Resampler::FastBSinc12);
HANDLE_RESAMPLER(Resampler::BSinc12);
HANDLE_RESAMPLER(Resampler::FastBSinc24);
HANDLE_RESAMPLER(Resampler::BSinc24);
}
#undef HANDLE_RESAMPLER
/* Should never get here. */
throw std::runtime_error{"Unexpected resampler index"};
}
al::optional<DistanceModel> DistanceModelFromALenum(ALenum model)
{
switch(model)
{
case AL_NONE: return al::make_optional(DistanceModel::Disable);
case AL_INVERSE_DISTANCE: return al::make_optional(DistanceModel::Inverse);
case AL_INVERSE_DISTANCE_CLAMPED: return al::make_optional(DistanceModel::InverseClamped);
case AL_LINEAR_DISTANCE: return al::make_optional(DistanceModel::Linear);
case AL_LINEAR_DISTANCE_CLAMPED: return al::make_optional(DistanceModel::LinearClamped);
case AL_EXPONENT_DISTANCE: return al::make_optional(DistanceModel::Exponent);
case AL_EXPONENT_DISTANCE_CLAMPED: return al::make_optional(DistanceModel::ExponentClamped);
}
return al::nullopt;
}
ALenum ALenumFromDistanceModel(DistanceModel model)
{
switch(model)
{
case DistanceModel::Disable: return AL_NONE;
case DistanceModel::Inverse: return AL_INVERSE_DISTANCE;
case DistanceModel::InverseClamped: return AL_INVERSE_DISTANCE_CLAMPED;
case DistanceModel::Linear: return AL_LINEAR_DISTANCE;
case DistanceModel::LinearClamped: return AL_LINEAR_DISTANCE_CLAMPED;
case DistanceModel::Exponent: return AL_EXPONENT_DISTANCE;
case DistanceModel::ExponentClamped: return AL_EXPONENT_DISTANCE_CLAMPED;
}
throw std::runtime_error{"Unexpected distance model "+std::to_string(static_cast<int>(model))};
}
} // 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
{
static const auto spoof = al::getenv("ALSOFT_SPOOF_VERSION");
if(spoof) return spoof->c_str();
return ALSOFT_VERSION;
}
END_API_FUNC
#define DO_UPDATEPROPS() do { \
if(!context->mDeferUpdates.load(std::memory_order_acquire)) \
UpdateContextProps(context.get()); \
else \
context->mPropsDirty.set(std::memory_order_release); \
} while(0)
AL_API void AL_APIENTRY alEnable(ALenum capability)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if UNLIKELY(!context) return;
switch(capability)
{
case AL_SOURCE_DISTANCE_MODEL:
{
std::lock_guard<std::mutex> _{context->mPropLock};
context->mSourceDistanceModel = true;
DO_UPDATEPROPS();
}
break;
case AL_STOP_SOURCES_ON_DISCONNECT_SOFT:
context->setError(AL_INVALID_OPERATION, "Re-enabling AL_STOP_SOURCES_ON_DISCONNECT_SOFT not yet supported");
break;
default:
context->setError(AL_INVALID_VALUE, "Invalid enable property 0x%04x", capability);
}
}
END_API_FUNC
AL_API void AL_APIENTRY alDisable(ALenum capability)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if UNLIKELY(!context) return;
switch(capability)
{
case AL_SOURCE_DISTANCE_MODEL:
{
std::lock_guard<std::mutex> _{context->mPropLock};
context->mSourceDistanceModel = false;
DO_UPDATEPROPS();
}
break;
case AL_STOP_SOURCES_ON_DISCONNECT_SOFT:
context->mStopVoicesOnDisconnect = false;
break;
default:
context->setError(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->mPropLock};
ALboolean value{AL_FALSE};
switch(capability)
{
case AL_SOURCE_DISTANCE_MODEL:
value = context->mSourceDistanceModel ? AL_TRUE : AL_FALSE;
break;
case AL_STOP_SOURCES_ON_DISCONNECT_SOFT:
value = context->mStopVoicesOnDisconnect ? AL_TRUE : AL_FALSE;
break;
default:
context->setError(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->mPropLock};
ALboolean value{AL_FALSE};
switch(pname)
{
case AL_DOPPLER_FACTOR:
if(context->mDopplerFactor != 0.0f)
value = AL_TRUE;
break;
case AL_DOPPLER_VELOCITY:
if(context->mDopplerVelocity != 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->mSpeedOfSound != 0.0f)
value = AL_TRUE;
break;
case AL_DEFERRED_UPDATES_SOFT:
if(context->mDeferUpdates.load(std::memory_order_acquire))
value = AL_TRUE;
break;
case AL_GAIN_LIMIT_SOFT:
if(GainMixMax/context->mGainBoost != 0.0f)
value = AL_TRUE;
break;
case AL_NUM_RESAMPLERS_SOFT:
/* Always non-0. */
value = AL_TRUE;
break;
case AL_DEFAULT_RESAMPLER_SOFT:
value = static_cast<int>(ResamplerDefault) ? AL_TRUE : AL_FALSE;
break;
default:
context->setError(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->mPropLock};
ALdouble value{0.0};
switch(pname)
{
case AL_DOPPLER_FACTOR:
value = context->mDopplerFactor;
break;
case AL_DOPPLER_VELOCITY:
value = context->mDopplerVelocity;
break;
case AL_DISTANCE_MODEL:
value = static_cast<ALdouble>(ALenumFromDistanceModel(context->mDistanceModel));
break;
case AL_SPEED_OF_SOUND:
value = context->mSpeedOfSound;
break;
case AL_DEFERRED_UPDATES_SOFT:
if(context->mDeferUpdates.load(std::memory_order_acquire))
value = static_cast<ALdouble>(AL_TRUE);
break;
case AL_GAIN_LIMIT_SOFT:
value = ALdouble{GainMixMax}/context->mGainBoost;
break;
case AL_NUM_RESAMPLERS_SOFT:
value = static_cast<ALdouble>(Resampler::Max) + 1.0;
break;
case AL_DEFAULT_RESAMPLER_SOFT:
value = static_cast<ALdouble>(ResamplerDefault);
break;
default:
context->setError(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->mPropLock};
ALfloat value{0.0f};
switch(pname)
{
case AL_DOPPLER_FACTOR:
value = context->mDopplerFactor;
break;
case AL_DOPPLER_VELOCITY:
value = context->mDopplerVelocity;
break;
case AL_DISTANCE_MODEL:
value = static_cast<ALfloat>(ALenumFromDistanceModel(context->mDistanceModel));
break;
case AL_SPEED_OF_SOUND:
value = context->mSpeedOfSound;
break;
case AL_DEFERRED_UPDATES_SOFT:
if(context->mDeferUpdates.load(std::memory_order_acquire))
value = static_cast<ALfloat>(AL_TRUE);
break;
case AL_GAIN_LIMIT_SOFT:
value = GainMixMax/context->mGainBoost;
break;
case AL_NUM_RESAMPLERS_SOFT:
value = static_cast<ALfloat>(Resampler::Max) + 1.0f;
break;
case AL_DEFAULT_RESAMPLER_SOFT:
value = static_cast<ALfloat>(ResamplerDefault);
break;
default:
context->setError(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->mPropLock};
ALint value{0};
switch(pname)
{
case AL_DOPPLER_FACTOR:
value = static_cast<ALint>(context->mDopplerFactor);
break;
case AL_DOPPLER_VELOCITY:
value = static_cast<ALint>(context->mDopplerVelocity);
break;
case AL_DISTANCE_MODEL:
value = ALenumFromDistanceModel(context->mDistanceModel);
break;
case AL_SPEED_OF_SOUND:
value = static_cast<ALint>(context->mSpeedOfSound);
break;
case AL_DEFERRED_UPDATES_SOFT:
if(context->mDeferUpdates.load(std::memory_order_acquire))
value = AL_TRUE;
break;
case AL_GAIN_LIMIT_SOFT:
value = static_cast<ALint>(GainMixMax/context->mGainBoost);
break;
case AL_NUM_RESAMPLERS_SOFT:
value = static_cast<int>(Resampler::Max) + 1;
break;
case AL_DEFAULT_RESAMPLER_SOFT:
value = static_cast<int>(ResamplerDefault);
break;
default:
context->setError(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_i64;
std::lock_guard<std::mutex> _{context->mPropLock};
ALint64SOFT value{0};
switch(pname)
{
case AL_DOPPLER_FACTOR:
value = static_cast<ALint64SOFT>(context->mDopplerFactor);
break;
case AL_DOPPLER_VELOCITY:
value = static_cast<ALint64SOFT>(context->mDopplerVelocity);
break;
case AL_DISTANCE_MODEL:
value = ALenumFromDistanceModel(context->mDistanceModel);
break;
case AL_SPEED_OF_SOUND:
value = static_cast<ALint64SOFT>(context->mSpeedOfSound);
break;
case AL_DEFERRED_UPDATES_SOFT:
if(context->mDeferUpdates.load(std::memory_order_acquire))
value = AL_TRUE;
break;
case AL_GAIN_LIMIT_SOFT:
value = static_cast<ALint64SOFT>(GainMixMax/context->mGainBoost);
break;
case AL_NUM_RESAMPLERS_SOFT:
value = static_cast<ALint64SOFT>(Resampler::Max) + 1;
break;
case AL_DEFAULT_RESAMPLER_SOFT:
value = static_cast<ALint64SOFT>(ResamplerDefault);
break;
default:
context->setError(AL_INVALID_VALUE, "Invalid integer64 property 0x%04x", pname);
}
return value;
}
END_API_FUNC
AL_API ALvoid* AL_APIENTRY alGetPointerSOFT(ALenum pname)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if UNLIKELY(!context) return nullptr;
std::lock_guard<std::mutex> _{context->mPropLock};
void *value{nullptr};
switch(pname)
{
case AL_EVENT_CALLBACK_FUNCTION_SOFT:
value = reinterpret_cast<void*>(context->mEventCb);
break;
case AL_EVENT_CALLBACK_USER_PARAM_SOFT:
value = context->mEventParam;
break;
default:
context->setError(AL_INVALID_VALUE, "Invalid pointer property 0x%04x", pname);
}
return value;
}
END_API_FUNC
AL_API void 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)
context->setError(AL_INVALID_VALUE, "NULL pointer");
else switch(pname)
{
default:
context->setError(AL_INVALID_VALUE, "Invalid boolean-vector property 0x%04x", pname);
}
}
END_API_FUNC
AL_API void 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)
context->setError(AL_INVALID_VALUE, "NULL pointer");
else switch(pname)
{
default:
context->setError(AL_INVALID_VALUE, "Invalid double-vector property 0x%04x", pname);
}
}
END_API_FUNC
AL_API void 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)
context->setError(AL_INVALID_VALUE, "NULL pointer");
else switch(pname)
{
default:
context->setError(AL_INVALID_VALUE, "Invalid float-vector property 0x%04x", pname);
}
}
END_API_FUNC
AL_API void 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)
context->setError(AL_INVALID_VALUE, "NULL pointer");
else switch(pname)
{
default:
context->setError(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)
context->setError(AL_INVALID_VALUE, "NULL pointer");
else switch(pname)
{
default:
context->setError(AL_INVALID_VALUE, "Invalid integer64-vector property 0x%04x", pname);
}
}
END_API_FUNC
AL_API void AL_APIENTRY alGetPointervSOFT(ALenum pname, ALvoid **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)
context->setError(AL_INVALID_VALUE, "NULL pointer");
else switch(pname)
{
default:
context->setError(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->mExtensionList;
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:
context->setError(AL_INVALID_VALUE, "Invalid string property 0x%04x", pname);
}
return value;
}
END_API_FUNC
AL_API void AL_APIENTRY alDopplerFactor(ALfloat value)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if UNLIKELY(!context) return;
if(!(value >= 0.0f && std::isfinite(value)))
context->setError(AL_INVALID_VALUE, "Doppler factor %f out of range", value);
else
{
std::lock_guard<std::mutex> _{context->mPropLock};
context->mDopplerFactor = value;
DO_UPDATEPROPS();
}
}
END_API_FUNC
AL_API void AL_APIENTRY alDopplerVelocity(ALfloat value)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if UNLIKELY(!context) return;
if(!(value >= 0.0f && std::isfinite(value)))
context->setError(AL_INVALID_VALUE, "Doppler velocity %f out of range", value);
else
{
std::lock_guard<std::mutex> _{context->mPropLock};
context->mDopplerVelocity = value;
DO_UPDATEPROPS();
}
}
END_API_FUNC
AL_API void AL_APIENTRY alSpeedOfSound(ALfloat value)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if UNLIKELY(!context) return;
if(!(value > 0.0f && std::isfinite(value)))
context->setError(AL_INVALID_VALUE, "Speed of sound %f out of range", value);
else
{
std::lock_guard<std::mutex> _{context->mPropLock};
context->mSpeedOfSound = value;
DO_UPDATEPROPS();
}
}
END_API_FUNC
AL_API void AL_APIENTRY alDistanceModel(ALenum value)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if UNLIKELY(!context) return;
if(auto model = DistanceModelFromALenum(value))
{
std::lock_guard<std::mutex> _{context->mPropLock};
context->mDistanceModel = *model;
if(!context->mSourceDistanceModel)
DO_UPDATEPROPS();
}
else
context->setError(AL_INVALID_VALUE, "Distance model 0x%04x out of range", value);
}
END_API_FUNC
AL_API void AL_APIENTRY alDeferUpdatesSOFT(void)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if UNLIKELY(!context) return;
context->deferUpdates();
}
END_API_FUNC
AL_API void AL_APIENTRY alProcessUpdatesSOFT(void)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if UNLIKELY(!context) return;
context->processUpdates();
}
END_API_FUNC
AL_API const ALchar* AL_APIENTRY alGetStringiSOFT(ALenum pname, ALsizei index)
START_API_FUNC
{
ContextRef context{GetContextRef()};
if UNLIKELY(!context) return nullptr;
const ALchar *value{nullptr};
switch(pname)
{
case AL_RESAMPLER_NAME_SOFT:
if(index < 0 || index > static_cast<ALint>(Resampler::Max))
context->setError(AL_INVALID_VALUE, "Resampler name index %d out of range", index);
else
value = GetResamplerName(static_cast<Resampler>(index));
break;
default:
context->setError(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. */
ContextProps *props{context->mFreeContextProps.load(std::memory_order_acquire)};
if(!props)
props = new ContextProps{};
else
{
ContextProps *next;
do {
next = props->next.load(std::memory_order_relaxed);
} while(context->mFreeContextProps.compare_exchange_weak(props, next,
std::memory_order_seq_cst, std::memory_order_acquire) == 0);
}
/* Copy in current property values. */
props->DopplerFactor = context->mDopplerFactor;
props->DopplerVelocity = context->mDopplerVelocity;
props->SpeedOfSound = context->mSpeedOfSound;
props->SourceDistanceModel = context->mSourceDistanceModel;
props->mDistanceModel = context->mDistanceModel;
/* Set the new container for updating internal parameters. */
props = context->mParams.ContextUpdate.exchange(props, std::memory_order_acq_rel);
if(props)
{
/* If there was an unused update container, put it back in the
* freelist.
*/
AtomicReplaceHead(context->mFreeContextProps, props);
}
}
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