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#ifndef ALCONTEXT_H
#define ALCONTEXT_H
#include "AL/al.h"
#include "AL/alc.h"
#include "AL/alext.h"
#include "inprogext.h"
#include "atomic.h"
#include "vector.h"
#include "threads.h"
#include "alListener.h"
struct ALsource;
struct ALeffectslot;
struct ALcontextProps;
struct ALlistenerProps;
struct ALvoiceProps;
struct ALeffectslotProps;
struct ALvoice;
struct ALeffectslotArray;
struct ll_ringbuffer;
enum class DistanceModel {
InverseClamped = AL_INVERSE_DISTANCE_CLAMPED,
LinearClamped = AL_LINEAR_DISTANCE_CLAMPED,
ExponentClamped = AL_EXPONENT_DISTANCE_CLAMPED,
Inverse = AL_INVERSE_DISTANCE,
Linear = AL_LINEAR_DISTANCE,
Exponent = AL_EXPONENT_DISTANCE,
Disable = AL_NONE,
Default = InverseClamped
};
struct SourceSubList {
uint64_t FreeMask;
ALsource *Sources; /* 64 */
};
TYPEDEF_VECTOR(SourceSubList, vector_SourceSubList)
/* Effect slots are rather large, and apps aren't likely to have more than one
* or two (let alone 64), so hold them individually.
*/
using ALeffectslotPtr = struct ALeffectslot*;
TYPEDEF_VECTOR(ALeffectslotPtr, vector_ALeffectslotPtr)
struct ALCcontext_struct {
RefCount ref;
vector_SourceSubList SourceList;
ALuint NumSources;
almtx_t SourceLock;
vector_ALeffectslotPtr EffectSlotList;
almtx_t EffectSlotLock;
ATOMIC(ALenum) LastError;
enum DistanceModel DistanceModel;
ALboolean SourceDistanceModel;
ALfloat DopplerFactor;
ALfloat DopplerVelocity;
ALfloat SpeedOfSound;
ALfloat MetersPerUnit;
ATOMIC(ALenum) PropsClean;
ATOMIC(ALenum) DeferUpdates;
almtx_t PropLock;
/* Counter for the pre-mixing updates, in 31.1 fixed point (lowest bit
* indicates if updates are currently happening).
*/
RefCount UpdateCount;
ATOMIC(ALenum) HoldUpdates;
ALfloat GainBoost;
ATOMIC(ALcontextProps*) Update;
/* Linked lists of unused property containers, free to use for future
* updates.
*/
ATOMIC(ALcontextProps*) FreeContextProps;
ATOMIC(ALlistenerProps*) FreeListenerProps;
ATOMIC(ALvoiceProps*) FreeVoiceProps;
ATOMIC(ALeffectslotProps*) FreeEffectslotProps;
ALvoice **Voices;
ALsizei VoiceCount;
ALsizei MaxVoices;
ATOMIC(ALeffectslotArray*) ActiveAuxSlots;
althrd_t EventThread;
alsem_t EventSem;
ll_ringbuffer *AsyncEvents;
ATOMIC(ALbitfieldSOFT) EnabledEvts;
almtx_t EventCbLock;
ALEVENTPROCSOFT EventCb;
void *EventParam;
/* Default effect slot */
ALeffectslot *DefaultSlot;
ALCdevice *Device;
const ALCchar *ExtensionList;
ATOMIC(ALCcontext*) next;
ALlistener Listener;
};
ALCcontext *GetContextRef(void);
void ALCcontext_DecRef(ALCcontext *context);
void UpdateContextProps(ALCcontext *context);
void ALCcontext_DeferUpdates(ALCcontext *context);
void ALCcontext_ProcessUpdates(ALCcontext *context);
inline void LockEffectSlotList(ALCcontext *context)
{ almtx_lock(&context->EffectSlotLock); }
inline void UnlockEffectSlotList(ALCcontext *context)
{ almtx_unlock(&context->EffectSlotLock); }
/* Simple RAII context reference. Takes the reference of the provided
* ALCcontext, and decrements it when leaving scope. Movable (transfer
* reference) but not copyable (no new references).
*/
class ContextRef {
ALCcontext *mCtx{nullptr};
void release() noexcept
{
if(mCtx)
ALCcontext_DecRef(mCtx);
mCtx = nullptr;
}
public:
ContextRef() noexcept = default;
explicit ContextRef(ALCcontext *ctx) noexcept : mCtx(ctx) { }
~ContextRef() { release(); }
ContextRef& operator=(const ContextRef&) = delete;
ContextRef& operator=(ContextRef&& rhs) noexcept
{
release();
mCtx = rhs.mCtx;
rhs.mCtx = nullptr;
return *this;
}
operator bool() const noexcept { return mCtx != nullptr; }
ALCcontext* operator->() noexcept { return mCtx; }
ALCcontext* get() noexcept { return mCtx; }
};
struct ALcontextProps {
ALfloat DopplerFactor;
ALfloat DopplerVelocity;
ALfloat SpeedOfSound;
ALboolean SourceDistanceModel;
enum DistanceModel DistanceModel;
ALfloat MetersPerUnit;
ATOMIC(struct ALcontextProps*) next;
};
#endif /* ALCONTEXT_H */
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