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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
#ifndef ALCONTEXT_H
#define ALCONTEXT_H
#include <mutex>
#include <atomic>
#include <memory>
#include <thread>
#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 = std::unique_ptr<ALeffectslot>;
struct ALCcontext_struct {
RefCount ref{1u};
al::vector<SourceSubList> SourceList;
ALuint NumSources{0};
almtx_t SourceLock;
al::vector<ALeffectslotPtr> EffectSlotList;
almtx_t EffectSlotLock;
ATOMIC(ALenum) LastError{AL_NO_ERROR};
DistanceModel mDistanceModel{DistanceModel::Default};
ALboolean SourceDistanceModel{AL_FALSE};
ALfloat DopplerFactor{1.0f};
ALfloat DopplerVelocity{1.0f};
ALfloat SpeedOfSound{};
ALfloat MetersPerUnit{1.0f};
std::atomic_flag PropsClean{true};
std::atomic<bool> DeferUpdates{false};
almtx_t PropLock;
/* Counter for the pre-mixing updates, in 31.1 fixed point (lowest bit
* indicates if updates are currently happening).
*/
RefCount UpdateCount{0u};
ATOMIC(ALenum) HoldUpdates{AL_FALSE};
ALfloat GainBoost{1.0f};
ATOMIC(ALcontextProps*) Update{nullptr};
/* Linked lists of unused property containers, free to use for future
* updates.
*/
ATOMIC(ALcontextProps*) FreeContextProps{nullptr};
ATOMIC(ALlistenerProps*) FreeListenerProps{nullptr};
ATOMIC(ALvoiceProps*) FreeVoiceProps{nullptr};
ATOMIC(ALeffectslotProps*) FreeEffectslotProps{nullptr};
ALvoice **Voices{nullptr};
std::atomic<ALsizei> VoiceCount{0};
ALsizei MaxVoices{0};
ATOMIC(ALeffectslotArray*) ActiveAuxSlots{nullptr};
std::thread EventThread;
alsem_t EventSem;
ll_ringbuffer *AsyncEvents{nullptr};
ATOMIC(ALbitfieldSOFT) EnabledEvts{0u};
std::mutex EventCbLock;
ALEVENTPROCSOFT EventCb{};
void *EventParam{nullptr};
/* Default effect slot */
std::unique_ptr<ALeffectslot> DefaultSlot;
ALCdevice *const Device;
const ALCchar *ExtensionList{nullptr};
ATOMIC(ALCcontext*) next{nullptr};
ALlistener Listener{};
ALCcontext_struct(ALCdevice *device);
ALCcontext_struct(const ALCcontext_struct&) = delete;
ALCcontext_struct& operator=(const ALCcontext_struct&) = delete;
~ALCcontext_struct();
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);
/* 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 reset() noexcept
{
if(mCtx)
ALCcontext_DecRef(mCtx);
mCtx = nullptr;
}
public:
ContextRef() noexcept = default;
ContextRef(ContextRef&& rhs) noexcept : mCtx{rhs.mCtx}
{ rhs.mCtx = nullptr; }
explicit ContextRef(ALCcontext *ctx) noexcept : mCtx(ctx) { }
~ContextRef() { reset(); }
ContextRef& operator=(const ContextRef&) = delete;
ContextRef& operator=(ContextRef&& rhs) noexcept
{
reset();
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; }
ALCcontext* release() noexcept
{
ALCcontext *ret{mCtx};
mCtx = nullptr;
return ret;
}
};
struct ALcontextProps {
ALfloat DopplerFactor;
ALfloat DopplerVelocity;
ALfloat SpeedOfSound;
ALboolean SourceDistanceModel;
DistanceModel mDistanceModel;
ALfloat MetersPerUnit;
ATOMIC(struct ALcontextProps*) next;
};
#endif /* ALCONTEXT_H */
|
