alc/context.h

   1 #ifndef ALC_CONTEXT_H
   2 #define ALC_CONTEXT_H
   3
   4 #include <atomic>
   5 #include <bitset>
   6 #include <cstdint>
   7 #include <deque>
   8 #include <memory>
   9 #include <mutex>
  10 #include <string>
  11 #include <string_view>
  12 #include <unordered_map>
  13 #include <utility>
  14 #include <vector>
  15
  16 #include "AL/al.h"
  17 #include "AL/alc.h"
  18 #include "AL/alext.h"
  19
  20 #include "al/listener.h"
  21 #include "althreads.h"
  22 #include "core/context.h"
  23 #include "intrusive_ptr.h"
  24 #include "opthelpers.h"
  25
  26 #ifdef ALSOFT_EAX
  27 #include "al/eax/api.h"
  28 #include "al/eax/exception.h"
  29 #include "al/eax/fx_slot_index.h"
  30 #include "al/eax/fx_slots.h"
  31 #include "al/eax/utils.h"
  32
  33 class EaxCall;
  34 #endif // ALSOFT_EAX
  35
  36 struct ALeffect;
  37 struct ALeffectslot;
  38 struct DebugGroup;
  39 struct EffectSlotSubList;
  40 struct SourceSubList;
  41
  42 enum class DebugSource : std::uint8_t;
  43 enum class DebugType : std::uint8_t;
  44 enum class DebugSeverity : std::uint8_t;
  45
  46 using uint = unsigned int;
  47
  48
  49 enum ContextFlags {
  50     DebugBit = 0, /* ALC_CONTEXT_DEBUG_BIT_EXT */
  51 };
  52 using ContextFlagBitset = std::bitset<sizeof(ALuint)*8>;
  53
  54
  55 struct DebugLogEntry {
  56     const DebugSource mSource;
  57     const DebugType mType;
  58     const DebugSeverity mSeverity;
  59     const uint mId;
  60
  61     std::string mMessage;
  62
  63     template<typename T>
  64     DebugLogEntry(DebugSource source, DebugType type, uint id, DebugSeverity severity, T&& message)
  65         : mSource{source}, mType{type}, mSeverity{severity}, mId{id}
  66         , mMessage{std::forward<T>(message)}
  67     { }
  68     DebugLogEntry(const DebugLogEntry&) = default;
  69     DebugLogEntry(DebugLogEntry&&) = default;
  70 };
  71
  72
  73 struct ALCcontext : public al::intrusive_ref<ALCcontext>, ContextBase {
  74     const al::intrusive_ptr<ALCdevice> mALDevice;
  75
  76
  77     bool mPropsDirty{true};
  78     bool mDeferUpdates{false};
  79
  80     std::mutex mPropLock;
  81
  82     al::tss<ALenum> mLastThreadError{AL_NO_ERROR};
  83
  84     const ContextFlagBitset mContextFlags;
  85     std::atomic<bool> mDebugEnabled{false};
  86
  87     DistanceModel mDistanceModel{DistanceModel::Default};
  88     bool mSourceDistanceModel{false};
  89
  90     float mDopplerFactor{1.0f};
  91     float mDopplerVelocity{1.0f};
  92     float mSpeedOfSound{SpeedOfSoundMetersPerSec};
  93     float mAirAbsorptionGainHF{AirAbsorbGainHF};
  94
  95     std::mutex mEventCbLock;
  96     ALEVENTPROCSOFT mEventCb{};
  97     void *mEventParam{nullptr};
  98
  99     std::mutex mDebugCbLock;
 100     ALDEBUGPROCEXT mDebugCb{};
 101     void *mDebugParam{nullptr};
 102     std::vector<DebugGroup> mDebugGroups;
 103     std::deque<DebugLogEntry> mDebugLog;
 104
 105     ALlistener mListener{};
 106
 107     std::vector<SourceSubList> mSourceList;
 108     ALuint mNumSources{0};
 109     std::mutex mSourceLock;
 110
 111     std::vector<EffectSlotSubList> mEffectSlotList;
 112     ALuint mNumEffectSlots{0u};
 113     std::mutex mEffectSlotLock;
 114
 115     /* Default effect slot */
 116     std::unique_ptr<ALeffectslot> mDefaultSlot;
 117
 118     std::vector<std::string_view> mExtensions;
 119     std::string mExtensionsString{};
 120
 121     std::unordered_map<ALuint,std::string> mSourceNames;
 122     std::unordered_map<ALuint,std::string> mEffectSlotNames;
 123
 124     ALCcontext(al::intrusive_ptr<ALCdevice> device, ContextFlagBitset flags);
 125     ALCcontext(const ALCcontext&) = delete;
 126     ALCcontext& operator=(const ALCcontext&) = delete;
 127     ~ALCcontext();
 128
 129     void init();
 130     /**
 131      * Removes the context from its device and removes it from being current on
 132      * the running thread or globally. Stops device playback if this was the
 133      * last context on its device.
 134      */
 135     void deinit();
 136
 137     /**
 138      * Defers/suspends updates for the given context's listener and sources.
 139      * This does *NOT* stop mixing, but rather prevents certain property
 140      * changes from taking effect. mPropLock must be held when called.
 141      */
 142     void deferUpdates() noexcept { mDeferUpdates = true; }
 143
 144     /**
 145      * Resumes update processing after being deferred. mPropLock must be held
 146      * when called.
 147      */
 148     void processUpdates()
 149     {
 150         if(std::exchange(mDeferUpdates, false))
 151             applyAllUpdates();
 152     }
 153
 154     /**
 155      * Applies all pending updates for the context, listener, effect slots, and
 156      * sources.
 157      */
 158     void applyAllUpdates();
 159
 160 #ifdef __MINGW32__
 161     [[gnu::format(__MINGW_PRINTF_FORMAT, 3, 4)]]
 162 #else
 163     [[gnu::format(printf, 3, 4)]]
 164 #endif
 165     void setError(ALenum errorCode, const char *msg, ...);
 166
 167     void sendDebugMessage(std::unique_lock<std::mutex> &debuglock, DebugSource source,
 168         DebugType type, ALuint id, DebugSeverity severity, std::string_view message);
 169
 170     void debugMessage(DebugSource source, DebugType type, ALuint id, DebugSeverity severity,
 171         std::string_view message)
 172     {
 173         if(!mDebugEnabled.load(std::memory_order_relaxed)) LIKELY
 174             return;
 175         std::unique_lock<std::mutex> debuglock{mDebugCbLock};
 176         sendDebugMessage(debuglock, source, type, id, severity, message);
 177     }
 178
 179     /* Process-wide current context */
 180     static std::atomic<bool> sGlobalContextLock;
 181     static std::atomic<ALCcontext*> sGlobalContext;
 182
 183 private:
 184     /* Thread-local current context. */
 185     static inline thread_local ALCcontext *sLocalContext{};
 186
 187     /* Thread-local context handling. This handles attempting to release the
 188      * context which may have been left current when the thread is destroyed.
 189      */
 190     class ThreadCtx {
 191     public:
 192         ~ThreadCtx();
 193         /* NOLINTBEGIN(readability-convert-member-functions-to-static)
 194          * This should be non-static to invoke construction of the thread-local
 195          * sThreadContext, so that it's destructor gets run at thread exit to
 196          * clear sLocalContext (which isn't a member variable to make read
 197          * access efficient).
 198          */
 199         void set(ALCcontext *ctx) const noexcept { sLocalContext = ctx; }
 200         /* NOLINTEND(readability-convert-member-functions-to-static) */
 201     };
 202     static thread_local ThreadCtx sThreadContext;
 203
 204 public:
 205     static ALCcontext *getThreadContext() noexcept { return sLocalContext; }
 206     static void setThreadContext(ALCcontext *context) noexcept { sThreadContext.set(context); }
 207
 208     /* Default effect that applies to sources that don't have an effect on send 0. */
 209     static ALeffect sDefaultEffect;
 210
 211 #ifdef ALSOFT_EAX
 212     bool hasEax() const noexcept { return mEaxIsInitialized; }
 213     bool eaxIsCapable() const noexcept;
 214
 215     void eaxUninitialize() noexcept;
 216
 217     ALenum eax_eax_set(
 218         const GUID* property_set_id,
 219         ALuint property_id,
 220         ALuint property_source_id,
 221         ALvoid* property_value,
 222         ALuint property_value_size);
 223
 224     ALenum eax_eax_get(
 225         const GUID* property_set_id,
 226         ALuint property_id,
 227         ALuint property_source_id,
 228         ALvoid* property_value,
 229         ALuint property_value_size);
 230
 231     void eaxSetLastError() noexcept;
 232
 233     [[nodiscard]]
 234     auto eaxGetDistanceFactor() const noexcept -> float { return mEax.flDistanceFactor; }
 235
 236     [[nodiscard]]
 237     auto eaxGetPrimaryFxSlotIndex() const noexcept -> EaxFxSlotIndex
 238     { return mEaxPrimaryFxSlotIndex; }
 239
 240     const ALeffectslot& eaxGetFxSlot(EaxFxSlotIndexValue fx_slot_index) const
 241     { return mEaxFxSlots.get(fx_slot_index); }
 242     ALeffectslot& eaxGetFxSlot(EaxFxSlotIndexValue fx_slot_index)
 243     { return mEaxFxSlots.get(fx_slot_index); }
 244
 245     bool eaxNeedsCommit() const noexcept { return mEaxNeedsCommit; }
 246     void eaxCommit();
 247
 248     void eaxCommitFxSlots()
 249     { mEaxFxSlots.commit(); }
 250
 251 private:
 252     static constexpr auto eax_primary_fx_slot_id_dirty_bit = EaxDirtyFlags{1} << 0;
 253     static constexpr auto eax_distance_factor_dirty_bit = EaxDirtyFlags{1} << 1;
 254     static constexpr auto eax_air_absorption_hf_dirty_bit = EaxDirtyFlags{1} << 2;
 255     static constexpr auto eax_hf_reference_dirty_bit = EaxDirtyFlags{1} << 3;
 256     static constexpr auto eax_macro_fx_factor_dirty_bit = EaxDirtyFlags{1} << 4;
 257
 258     using Eax4Props = EAX40CONTEXTPROPERTIES;
 259
 260     struct Eax4State {
 261         Eax4Props i; // Immediate.
 262         Eax4Props d; // Deferred.
 263     };
 264
 265     using Eax5Props = EAX50CONTEXTPROPERTIES;
 266
 267     struct Eax5State {
 268         Eax5Props i; // Immediate.
 269         Eax5Props d; // Deferred.
 270     };
 271
 272     class ContextException : public EaxException
 273     {
 274     public:
 275         explicit ContextException(const char* message)
 276             : EaxException{"EAX_CONTEXT", message}
 277         {}
 278     };
 279
 280     struct Eax4PrimaryFxSlotIdValidator {
 281         void operator()(const GUID& guidPrimaryFXSlotID) const
 282         {
 283             if(guidPrimaryFXSlotID != EAX_NULL_GUID &&
 284                 guidPrimaryFXSlotID != EAXPROPERTYID_EAX40_FXSlot0 &&
 285                 guidPrimaryFXSlotID != EAXPROPERTYID_EAX40_FXSlot1 &&
 286                 guidPrimaryFXSlotID != EAXPROPERTYID_EAX40_FXSlot2 &&
 287                 guidPrimaryFXSlotID != EAXPROPERTYID_EAX40_FXSlot3)
 288             {
 289                 eax_fail_unknown_primary_fx_slot_id();
 290             }
 291         }
 292     };
 293
 294     struct Eax4DistanceFactorValidator {
 295         void operator()(float flDistanceFactor) const
 296         {
 297             eax_validate_range<ContextException>(
 298                 "Distance Factor",
 299                 flDistanceFactor,
 300                 EAXCONTEXT_MINDISTANCEFACTOR,
 301                 EAXCONTEXT_MAXDISTANCEFACTOR);
 302         }
 303     };
 304
 305     struct Eax4AirAbsorptionHfValidator {
 306         void operator()(float flAirAbsorptionHF) const
 307         {
 308             eax_validate_range<ContextException>(
 309                 "Air Absorption HF",
 310                 flAirAbsorptionHF,
 311                 EAXCONTEXT_MINAIRABSORPTIONHF,
 312                 EAXCONTEXT_MAXAIRABSORPTIONHF);
 313         }
 314     };
 315
 316     struct Eax4HfReferenceValidator {
 317         void operator()(float flHFReference) const
 318         {
 319             eax_validate_range<ContextException>(
 320                 "HF Reference",
 321                 flHFReference,
 322                 EAXCONTEXT_MINHFREFERENCE,
 323                 EAXCONTEXT_MAXHFREFERENCE);
 324         }
 325     };
 326
 327     struct Eax4AllValidator {
 328         void operator()(const EAX40CONTEXTPROPERTIES& all) const
 329         {
 330             Eax4PrimaryFxSlotIdValidator{}(all.guidPrimaryFXSlotID);
 331             Eax4DistanceFactorValidator{}(all.flDistanceFactor);
 332             Eax4AirAbsorptionHfValidator{}(all.flAirAbsorptionHF);
 333             Eax4HfReferenceValidator{}(all.flHFReference);
 334         }
 335     };
 336
 337     struct Eax5PrimaryFxSlotIdValidator {
 338         void operator()(const GUID& guidPrimaryFXSlotID) const
 339         {
 340             if(guidPrimaryFXSlotID != EAX_NULL_GUID &&
 341                 guidPrimaryFXSlotID != EAXPROPERTYID_EAX50_FXSlot0 &&
 342                 guidPrimaryFXSlotID != EAXPROPERTYID_EAX50_FXSlot1 &&
 343                 guidPrimaryFXSlotID != EAXPROPERTYID_EAX50_FXSlot2 &&
 344                 guidPrimaryFXSlotID != EAXPROPERTYID_EAX50_FXSlot3)
 345             {
 346                 eax_fail_unknown_primary_fx_slot_id();
 347             }
 348         }
 349     };
 350
 351     struct Eax5MacroFxFactorValidator {
 352         void operator()(float flMacroFXFactor) const
 353         {
 354             eax_validate_range<ContextException>(
 355                 "Macro FX Factor",
 356                 flMacroFXFactor,
 357                 EAXCONTEXT_MINMACROFXFACTOR,
 358                 EAXCONTEXT_MAXMACROFXFACTOR);
 359         }
 360     };
 361
 362     struct Eax5AllValidator {
 363         void operator()(const EAX50CONTEXTPROPERTIES& all) const
 364         {
 365             Eax5PrimaryFxSlotIdValidator{}(all.guidPrimaryFXSlotID);
 366             Eax4DistanceFactorValidator{}(all.flDistanceFactor);
 367             Eax4AirAbsorptionHfValidator{}(all.flAirAbsorptionHF);
 368             Eax4HfReferenceValidator{}(all.flHFReference);
 369             Eax5MacroFxFactorValidator{}(all.flMacroFXFactor);
 370         }
 371     };
 372
 373     struct Eax5EaxVersionValidator {
 374         void operator()(unsigned long ulEAXVersion) const
 375         {
 376             eax_validate_range<ContextException>(
 377                 "EAX version",
 378                 ulEAXVersion,
 379                 EAXCONTEXT_MINEAXSESSION,
 380                 EAXCONTEXT_MAXEAXSESSION);
 381         }
 382     };
 383
 384     struct Eax5MaxActiveSendsValidator {
 385         void operator()(unsigned long ulMaxActiveSends) const
 386         {
 387             eax_validate_range<ContextException>(
 388                 "Max Active Sends",
 389                 ulMaxActiveSends,
 390                 EAXCONTEXT_MINMAXACTIVESENDS,
 391                 EAXCONTEXT_MAXMAXACTIVESENDS);
 392         }
 393     };
 394
 395     struct Eax5SessionAllValidator {
 396         void operator()(const EAXSESSIONPROPERTIES& all) const
 397         {
 398             Eax5EaxVersionValidator{}(all.ulEAXVersion);
 399             Eax5MaxActiveSendsValidator{}(all.ulMaxActiveSends);
 400         }
 401     };
 402
 403     struct Eax5SpeakerConfigValidator {
 404         void operator()(unsigned long ulSpeakerConfig) const
 405         {
 406             eax_validate_range<ContextException>(
 407                 "Speaker Config",
 408                 ulSpeakerConfig,
 409                 EAXCONTEXT_MINSPEAKERCONFIG,
 410                 EAXCONTEXT_MAXSPEAKERCONFIG);
 411         }
 412     };
 413
 414     bool mEaxIsInitialized{};
 415     bool mEaxIsTried{};
 416
 417     long mEaxLastError{};
 418     unsigned long mEaxSpeakerConfig{};
 419
 420     EaxFxSlotIndex mEaxPrimaryFxSlotIndex{};
 421     EaxFxSlots mEaxFxSlots{};
 422
 423     int mEaxVersion{}; // Current EAX version.
 424     bool mEaxNeedsCommit{};
 425     EaxDirtyFlags mEaxDf{}; // Dirty flags for the current EAX version.
 426     Eax5State mEax123{}; // EAX1/EAX2/EAX3 state.
 427     Eax4State mEax4{}; // EAX4 state.
 428     Eax5State mEax5{}; // EAX5 state.
 429     Eax5Props mEax{}; // Current EAX state.
 430     EAXSESSIONPROPERTIES mEaxSession{};
 431
 432     [[noreturn]] static void eax_fail(const char* message);
 433     [[noreturn]] static void eax_fail_unknown_property_set_id();
 434     [[noreturn]] static void eax_fail_unknown_primary_fx_slot_id();
 435     [[noreturn]] static void eax_fail_unknown_property_id();
 436     [[noreturn]] static void eax_fail_unknown_version();
 437
 438     // Gets a value from EAX call,
 439     // validates it,
 440     // and updates the current value.
 441     template<typename TValidator, typename TProperty>
 442     static void eax_set(const EaxCall& call, TProperty& property)
 443     {
 444         const auto& value = call.get_value<ContextException, const TProperty>();
 445         TValidator{}(value);
 446         property = value;
 447     }
 448
 449     // Gets a new value from EAX call,
 450     // validates it,
 451     // updates the deferred value,
 452     // updates a dirty flag.
 453     template<
 454         typename TValidator,
 455         EaxDirtyFlags TDirtyBit,
 456         typename TMemberResult,
 457         typename TProps,
 458         typename TState>
 459     void eax_defer(const EaxCall& call, TState& state, TMemberResult TProps::*member)
 460     {
 461         const auto& src = call.get_value<ContextException, const TMemberResult>();
 462         TValidator{}(src);
 463         const auto& dst_i = state.i.*member;
 464         auto& dst_d = state.d.*member;
 465         dst_d = src;
 466
 467         if(dst_i != dst_d)
 468             mEaxDf |= TDirtyBit;
 469     }
 470
 471     template<
 472         EaxDirtyFlags TDirtyBit,
 473         typename TMemberResult,
 474         typename TProps,
 475         typename TState>
 476     void eax_context_commit_property(TState& state, EaxDirtyFlags& dst_df,
 477         TMemberResult TProps::*member) noexcept
 478     {
 479         if((mEaxDf & TDirtyBit) != EaxDirtyFlags{})
 480         {
 481             dst_df |= TDirtyBit;
 482             const auto& src_d = state.d.*member;
 483             state.i.*member = src_d;
 484             mEax.*member = src_d;
 485         }
 486     }
 487
 488     void eax_initialize_extensions();
 489     void eax_initialize();
 490
 491     bool eax_has_no_default_effect_slot() const noexcept;
 492     void eax_ensure_no_default_effect_slot() const;
 493     bool eax_has_enough_aux_sends() const noexcept;
 494     void eax_ensure_enough_aux_sends() const;
 495     void eax_ensure_compatibility();
 496
 497     unsigned long eax_detect_speaker_configuration() const;
 498     void eax_update_speaker_configuration();
 499
 500     void eax_set_last_error_defaults() noexcept;
 501     void eax_session_set_defaults() noexcept;
 502     static void eax4_context_set_defaults(Eax4Props& props) noexcept;
 503     static void eax4_context_set_defaults(Eax4State& state) noexcept;
 504     static void eax5_context_set_defaults(Eax5Props& props) noexcept;
 505     static void eax5_context_set_defaults(Eax5State& state) noexcept;
 506     void eax_context_set_defaults();
 507     void eax_set_defaults();
 508
 509     void eax_dispatch_fx_slot(const EaxCall& call);
 510     void eax_dispatch_source(const EaxCall& call);
 511
 512     void eax_get_misc(const EaxCall& call);
 513     void eax4_get(const EaxCall& call, const Eax4Props& props);
 514     void eax5_get(const EaxCall& call, const Eax5Props& props);
 515     void eax_get(const EaxCall& call);
 516
 517     void eax_context_commit_primary_fx_slot_id();
 518     void eax_context_commit_distance_factor();
 519     void eax_context_commit_air_absorbtion_hf();
 520     void eax_context_commit_hf_reference();
 521     void eax_context_commit_macro_fx_factor();
 522
 523     void eax_initialize_fx_slots();
 524
 525     void eax_update_sources();
 526
 527     void eax_set_misc(const EaxCall& call);
 528     void eax4_defer_all(const EaxCall& call, Eax4State& state);
 529     void eax4_defer(const EaxCall& call, Eax4State& state);
 530     void eax5_defer_all(const EaxCall& call, Eax5State& state);
 531     void eax5_defer(const EaxCall& call, Eax5State& state);
 532     void eax_set(const EaxCall& call);
 533
 534     void eax4_context_commit(Eax4State& state, EaxDirtyFlags& dst_df);
 535     void eax5_context_commit(Eax5State& state, EaxDirtyFlags& dst_df);
 536     void eax_context_commit();
 537 #endif // ALSOFT_EAX
 538 };
 539
 540 using ContextRef = al::intrusive_ptr<ALCcontext>;
 541
 542 ContextRef GetContextRef() noexcept;
 543
 544 void UpdateContextProps(ALCcontext *context);
 545
 546
 547 inline bool TrapALError{false};
 548
 549
 550 #ifdef ALSOFT_EAX
 551 auto AL_APIENTRY EAXSet(const GUID *property_set_id, ALuint property_id,
 552     ALuint source_id, ALvoid *value, ALuint value_size) noexcept -> ALenum;
 553
 554 auto AL_APIENTRY EAXGet(const GUID *property_set_id, ALuint property_id,
 555     ALuint source_id, ALvoid *value, ALuint value_size) noexcept -> ALenum;
 556 #endif // ALSOFT_EAX
 557
 558 #endif /* ALC_CONTEXT_H */