1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
#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 "almalloc.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{0u};
ALsource *Sources{nullptr}; /* 64 */
};
/* 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;
al::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;
DEF_NEWDEL(ALCcontext)
};
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 */
|
