package vendor:windows/XAudio2

Source

AUDIO_STREAM_CATEGORY :: enum i32 {
	Other          = 0, 
	// ForegroundOnlyMedia = 1,
	// BackgroundCapableMedia = 2,
	Communications = 3, 
	Alerts         = 4, 
	SoundEffects   = 5, 
	GameEffects    = 6, 
	GameMedia      = 7, 
	GameChat       = 8, 
	Speech         = 9, 
	Movie          = 10, 
	Media          = 11, 
	FarFieldSpeech = 12, 
	UniformSpeech  = 13, 
	VoiceTyping    = 14, 
}

BUFFER :: struct #packed {
	Flags:      FLAGS,
	// Either 0 or END_OF_STREAM.
	AudioBytes: u32,
	// Size of the audio data buffer in bytes.
	pAudioData: [^]u8,
	// Pointer to the audio data buffer.
	PlayBegin:  u32,
	// First sample in this buffer to be played.
	PlayLength: u32,
	// Length of the region to be played in samples, or 0 to play the whole buffer.
	LoopBegin:  u32,
	// First sample of the region to be looped.
	LoopLength: u32,
	// Length of the desired loop region in samples, or 0 to loop the entire buffer.
	LoopCount:  u32,
	// Number of times to repeat the loop region, or LOOP_INFINITE to loop forever.
	pContext:   rawptr,
}

BUFFER_WMA :: struct #packed {
	pDecodedPacketCumulativeBytes: [^]u32,
	// Decoded packet's cumulative size array. Each element is the number of bytes accumulated when the corresponding XWMA packet is decoded in order.  The array must have PacketCount elements.
	PacketCount:                   u32,
}

CALCULATE_FLAG :: enum u32 {
	MATRIX          = 0,  // enable matrix coefficient table calculation
	DELAY           = 1,  // enable delay time array calculation (stereo final mix only)
	LPF_DIRECT      = 2,  // enable LPF direct-path coefficient calculation
	LPF_REVERB      = 3,  // enable LPF reverb-path coefficient calculation
	REVERB          = 4,  // enable reverb send level calculation
	DOPPLER         = 5,  // enable doppler shift factor calculation
	EMITTER_ANGLE   = 6,  // enable emitter-to-listener interior angle calculation
	ZEROCENTER      = 16, // do not position to front center speaker, signal positioned to remaining speakers instead, front center destination channel will be zero in returned matrix coefficient table, valid only for matrix calculations with final mix formats that have a front center channel
	REDIRECT_TO_LFE = 17, // apply equal mix of all source channels to LFE destination channel, valid only for matrix calculations with sources that have no LFE channel and final mix formats that have an LFE channel
}

CALCULATE_FLAGS :: distinct bit_set[CALCULATE_FLAG; u32]

CONE :: struct #packed {
	InnerAngle:  f32,
	// inner cone angle in radians, must be within [0.0f, TAU]
	OuterAngle:  f32,
	// outer cone angle in radians, must be within [InnerAngle, TAU]
	InnerVolume: f32,
	// volume level scaler on/within inner cone, used only for matrix calculations, must be within [0.0f, 2.0f] when used
	OuterVolume: f32,
	// volume level scaler on/beyond outer cone, used only for matrix calculations, must be within [0.0f, 2.0f] when used
	InnerLPF:    f32,
	// LPF (both direct and reverb paths) coefficient subtrahend on/within inner cone, used only for LPF (both direct and reverb paths) calculations, must be within [0.0f, 1.0f] when used
	OuterLPF:    f32,
	// LPF (both direct and reverb paths) coefficient subtrahend on/beyond outer cone, used only for LPF (both direct and reverb paths) calculations, must be within [0.0f, 1.0f] when used
	InnerReverb: f32,
	// reverb send level scaler on/within inner cone, used only for reverb calculations, must be within [0.0f, 2.0f] when used
	OuterReverb: f32,
}

DEBUG_CONFIGURATION :: struct #packed {
	TraceMask:       DEBUG_CONFIG_FLAGS,
	// Bitmap of enabled debug message types.
	BreakMask:       DEBUG_CONFIG_FLAGS,
	// Message types that will break into the debugger.
	LogThreadID:     b32,
	// Whether to log the thread ID with each message.
	LogFileline:     b32,
	// Whether to log the source file and line number.
	LogFunctionName: b32,
	// Whether to log the function name.
	LogTiming:       b32,
}

DEBUG_CONFIG_FLAG :: enum u32 {
	ERRORS     = 0,  // For handled errors with serious effects.
	WARNINGS   = 1,  // For handled errors that may be recoverable.
	INFO       = 2,  // Informational chit-chat (e.g. state changes).
	DETAIL     = 3,  // More detailed chit-chat.
	API_CALLS  = 4,  // Public API function entries and exits.
	FUNC_CALLS = 5,  // Internal function entries and exits.
	TIMING     = 6,  // Delays detected and other timing data.
	LOCKS      = 7,  // Usage of critical sections and mutexes.
	MEMORY     = 8,  // Memory heap usage information.
	STREAMING  = 12, // Audio streaming information.
}

DEBUG_CONFIG_FLAGS :: distinct bit_set[DEBUG_CONFIG_FLAG; u32]

DISTANCE_CURVE :: struct #packed {
	pPoints:    [^]DISTANCE_CURVE_POINT `fmt:"v,PointCount"`,
	// distance curve point array, must have at least PointCount elements with no duplicates and be sorted in ascending order with respect to Distance
	PointCount: u32,
}

DISTANCE_CURVE_POINT :: struct #packed {
	Distance:   f32,
	// normalized distance, must be within [0.0f, 1.0f]
	DSPSetting: f32,
}

DSP_SETTINGS :: struct #packed {
	pMatrixCoefficients:       [^]f32,
	// [inout] matrix coefficient table, receives an array representing the volume level used to send from source channel S to destination channel D, stored as pMatrixCoefficients[SrcChannelCount * D + S], must have at least SrcChannelCount*DstChannelCount elements
	pDelayTimes:               [^]f32,
	// [inout] delay time array, receives delays for each destination channel in milliseconds, must have at least DstChannelCount elements (stereo final mix only)
	SrcChannelCount:           u32,
	// [in] number of source channels, must equal number of channels in respective emitter
	DstChannelCount:           u32,
	// [in] number of destination channels, must equal number of channels of the final mix
	LPFDirectCoefficient:      f32,
	// [out] LPF direct-path coefficient
	LPFReverbCoefficient:      f32,
	// [out] LPF reverb-path coefficient
	ReverbLevel:               f32,
	// [out] reverb send level
	DopplerFactor:             f32,
	// [out] doppler shift factor, scales resampler ratio for doppler shift effect, where the effective frequency = DopplerFactor * original frequency
	EmitterToListenerAngle:    f32,
	// [out] emitter-to-listener interior angle, expressed in radians with respect to the emitter's front orientation
	EmitterToListenerDistance: f32,
	// [out] distance in user-defined world units from the emitter base to listener position, always calculated
	EmitterVelocityComponent:  f32,
	// [out] component of emitter velocity vector projected onto emitter->listener vector in user-defined world units/second, calculated only for doppler
	ListenerVelocityComponent: f32,
}

EFFECT_CHAIN :: struct #packed {
	EffectCount:        u32,
	// Number of effects in this voice's effect chain.
	pEffectDescriptors: [^]EFFECT_DESCRIPTOR,
}

EFFECT_DESCRIPTOR :: struct #packed {
	pEffect:        ^sys_windows.IUnknown,
	// Pointer to the effect object's IUnknown interface.
	InitialState:   b32,
	// TRUE if the effect should begin in the enabled state.
	OutputChannels: u32,
}

EMITTER :: struct #packed {
	pCone:               ^CONE,
	// sound cone, used only with single-channel emitters for matrix, LPF (both direct and reverb paths), and reverb calculations, NULL specifies omnidirectionality
	OrientFront:         [3]f32,
	// orientation of front direction, used only for emitter angle calculations or with multi-channel emitters for matrix calculations or single-channel emitters with cones for matrix, LPF (both direct and reverb paths), and reverb calculations, must be normalized when used
	OrientTop:           [3]f32,
	// orientation of top direction, used only with multi-channel emitters for matrix calculations, must be orthonormal with OrientFront when used
	Position:            [3]f32,
	// position in user-defined world units, does not affect Velocity
	Velocity:            [3]f32,
	// velocity vector in user-defined world units/second, used only for doppler calculations, does not affect Position
	InnerRadius:         f32,
	// inner radius, must be within [0.0f, max(f32)]
	InnerRadiusAngle:    f32,
	// inner radius angle, must be within [0.0f, PI/4.0)
	ChannelCount:        u32,
	// number of sound channels, must be > 0
	ChannelRadius:       f32,
	// channel radius, used only with multi-channel emitters for matrix calculations, must be >= 0.0f when used
	pChannelAzimuths:    [^]f32 `fmt:"v,ChannelCount"`,
	// channel azimuth array, used only with multi-channel emitters for matrix calculations, contains positions of each channel expressed in radians along the channel radius with respect to the front orientation vector in the plane orthogonal to the top orientation vector, or TAU to specify an LFE channel, must have at least ChannelCount elements, all within [0.0f, TAU] when used
	pVolumeCurve:        ^DISTANCE_CURVE,
	// volume level distance curve, used only for matrix calculations, NULL specifies a default curve that conforms to the inverse square law, calculated in user-defined world units with distances <= CurveDistanceScaler clamped to no attenuation
	pLFECurve:           ^DISTANCE_CURVE,
	// LFE level distance curve, used only for matrix calculations, NULL specifies a default curve that conforms to the inverse square law, calculated in user-defined world units with distances <= CurveDistanceScaler clamped to no attenuation
	pLPFDirectCurve:     ^DISTANCE_CURVE,
	// LPF direct-path coefficient distance curve, used only for LPF direct-path calculations, NULL specifies the default curve: [0.0f,1.0f], [1.0f,0.75f]
	pLPFReverbCurve:     ^DISTANCE_CURVE,
	// LPF reverb-path coefficient distance curve, used only for LPF reverb-path calculations, NULL specifies the default curve: [0.0f,0.75f], [1.0f,0.75f]
	pReverbCurve:        ^DISTANCE_CURVE,
	// reverb send level distance curve, used only for reverb calculations, NULL specifies the default curve: [0.0f,1.0f], [1.0f,0.0f]
	CurveDistanceScaler: f32,
	// curve distance scaler, used to scale normalized distance curves to user-defined world units and/or exaggerate their effect, used only for matrix, LPF (both direct and reverb paths), and reverb calculations, must be within [min(f32), max(f32)] when used
	DopplerScaler:       f32,
}

FILTER_PARAMETERS :: struct #packed {
	Type:      FILTER_TYPE,
	// Filter type.
	Frequency: f32,
	// Filter coefficient. Must be >= 0 and <= MAX_FILTER_FREQUENCY. See CutoffFrequencyToRadians() for state-variable filter types and CutoffFrequencyToOnePoleCoefficient() for one-pole filter types.
	OneOverQ:  f32,
}

FILTER_TYPE :: enum i32 {
	LowPassFilter,         // Attenuates frequencies above the cutoff frequency (state-variable filter).
	BandPassFilter,        // Attenuates frequencies outside a given range      (state-variable filter).
	HighPassFilter,        // Attenuates frequencies below the cutoff frequency (state-variable filter).
	NotchFilter,           // Attenuates frequencies inside a given range       (state-variable filter).
	LowPassOnePoleFilter,  // Attenuates frequencies above the cutoff frequency (one-pole filter, FILTER_PARAMETERS.OneOverQ has no effect)
	HighPassOnePoleFilter, // Attenuates frequencies below the cutoff frequency (one-pole filter, FILTER_PARAMETERS.OneOverQ has no effect)
}

FLAG :: enum u32 {
	DEBUG_ENGINE            = 0,  // Used in Create
	VOICE_NOPITCH           = 1,  // Used in IXAudio2.CreateSourceVoice
	VOICE_NOSRC             = 2,  // Used in IXAudio2.CreateSourceVoice
	VOICE_USEFILTER         = 3,  // Used in IXAudio2.CreateSource/SubmixVoice
	PLAY_TAILS              = 5,  // Used in IXAudio2SourceVoice.Stop
	END_OF_STREAM           = 6,  // Used in BUFFER.Flags
	SEND_USEFILTER          = 7,  // Used in SEND_DESCRIPTOR.Flags
	VOICE_NOSAMPLESPLAYED   = 8,  // Used in IXAudio2SourceVoice.GetState
	STOP_ENGINE_WHEN_IDLE   = 13, // Used in Create to force the engine to Stop when no source voices are Started, and Start when a voice is Started
	QUANTUM_1024            = 15, // Used in Create to specify nondefault processing quantum of 21.33 ms (1024 samples at 48KHz)
	NO_VIRTUAL_AUDIO_CLIENT = 16, // Used in CreateMasteringVoice to create a virtual audio client
}

FLAGS :: distinct bit_set[FLAG; u32]

FXECHO_INITDATA :: struct #packed {
	MaxDelay: f32,
}

FXECHO_PARAMETERS :: struct #packed {
	WetDryMix: f32,
	// ratio of wet (processed) signal to dry (original) signal
	Feedback:  f32,
	// amount of output fed back into input
	Delay:     f32,
}

FXEQ_PARAMETERS :: struct #packed {
	FrequencyCenter0: f32,
	// center frequency in Hz, band 0
	Gain0:            f32,
	// boost/cut
	Bandwidth0:       f32,
	// bandwidth, region of EQ is center frequency +/- bandwidth/2
	FrequencyCenter1: f32,
	// band 1
	Gain1:            f32,
	Bandwidth1:       f32,
	FrequencyCenter2: f32,
	// band 2
	Gain2:            f32,
	Bandwidth2:       f32,
	FrequencyCenter3: f32,
	// band 3
	Gain3:            f32,
	Bandwidth3:       f32,
}

FXMASTERINGLIMITER_PARAMETERS :: struct #packed {
	Release:  u32,
	// release time (tuning factor with no specific units)
	Loudness: u32,
}

FXREVERB_PARAMETERS :: struct #packed {
	Diffusion: f32,
	// diffusion
	RoomSize:  f32,
}

HANDLE :: distinct [20]u8

HRESULT :: sys_windows.HRESULT

IUnknown :: sys_windows.IUnknown

IUnknown_VTable :: sys_windows.IUnknown_VTable

IXAPO :: struct #raw_union {
	iunknown:     sys_windows.IUnknown,
	using ixapo_vtable: ^IXAPO_VTable,
}

IXAPOParameters :: struct #raw_union {
	iunknown:               sys_windows.IUnknown,
	using ixapoparameters_vtable: ^IXAPOParameters_VTable,
}

IXAPOParameters_VTable :: struct {
	using iunknown_vtable: sys_windows.IUnknown_VTable,
	// DESCRIPTION:
	//  Sets effect-specific parameters.
	// REMARKS:
	//  This method may only be called on the realtime thread; no synchronization between it and IXAPO.Process is necessary.
	//  This method should not block as it is called from the realtime thread.
	// PARAMETERS:
	//  pParameters       - [in] effect-specific parameter block, must be != NULL
	//  ParameterByteSize - [in] size of pParameters in bytes, must be > 0
	// RETURN VALUE:
	//  void
	SetParameters:   proc "stdcall" (this: ^IXAPOParameters, pParameters: rawptr, ParameterByteSize: u32),
	// DESCRIPTION:
	//  Gets effect-specific parameters.
	// REMARKS:
	//  Unlike SetParameters, XAudio2 does not call this method on the realtime thread.  Thus, the XAPO must protect variables shared with SetParameters/Process using appropriate synchronization.
	// PARAMETERS:
	//  pParameters       - [out] receives effect-specific parameter block, must be != NULL
	//  ParameterByteSize - [in]  size of pParameters in bytes, must be > 0
	// RETURN VALUE:
	//  void
	GetParameters:   proc "stdcall" (this: ^IXAPOParameters, pParameters: rawptr, ParameterByteSize: u32),
}

IXAPO_VTable :: struct {
	using iunknown_vtable:     sys_windows.IUnknown_VTable,
	// DESCRIPTION:
	//  Allocates a copy of the registration properties of the XAPO.
	// PARAMETERS:
	//  ppRegistrationProperties - [out] receives pointer to copy of registration properties, use XAPOFree to free structure, left untouched on failure
	// RETURN VALUE:
	//  COM error code
	GetRegistrationProperties: proc "stdcall" (this: ^IXAPO, ppRegistrationProperties: ^^XAPO_REGISTRATION_PROPERTIES) -> sys_windows.HRESULT,
	// DESCRIPTION:
	//  Queries if an input/output configuration is supported.
	// REMARKS:
	//  This method allows XAPOs to express dependency of input format with respect to output format.
	//  If the input/output format pair configuration is unsupported, this method also determines the nearest input format supported.
	//  Nearest meaning closest bit depth, framerate, and channel count, in that order of importance.
	//  The behaviour of this method should remain constant after the XAPO has been initialized.
	// PARAMETERS:
	//  pOutputFormat          - [in]  output format known to be supported
	//  pRequestedInputFormat  - [in]  input format to examine
	//  ppSupportedInputFormat - [out] receives pointer to nearest input format supported if not NULL and input/output configuration unsupported, use XAPOFree to free structure, left untouched on any failure except XAPO_E_FORMAT_UNSUPPORTED
	// RETURN VALUE:
	//  COM error code, including:
	//    S_OK                      - input/output configuration supported, ppSupportedInputFormat left untouched
	//    FORMAT_UNSUPPORTED        - input/output configuration unsupported, ppSupportedInputFormat receives pointer to nearest input format supported if not NULL
	//    E_INVALIDARG              - either audio format invalid, ppSupportedInputFormat left untouched
	IsInputFormatSupported:    proc "stdcall" (this: ^IXAPO, pOutputFormat: ^sys_windows.WAVEFORMATEX, pRequestedInputFormat: ^sys_windows.WAVEFORMATEX, ppSupportedInputFormat: ^^sys_windows.WAVEFORMATEX) -> sys_windows.HRESULT,
	// DESCRIPTION:
	//  Queries if an input/output configuration is supported.
	// REMARKS:
	//  This method allows XAPOs to express dependency of output format with respect to input format.
	//  If the input/output format pair configuration is unsupported, this method also determines the nearest output format supported.
	//  Nearest meaning closest bit depth, framerate, and channel count, in that order of importance.
	//  The behaviour of this method should remain constant after the XAPO has been initialized.
	// PARAMETERS:
	//  pInputFormat            - [in]  input format known to be supported
	//  pRequestedOutputFormat  - [in]  output format to examine
	//  ppSupportedOutputFormat - [out] receives pointer to nearest output format supported if not NULL and input/output configuration unsupported, use XAPOFree to free structure, left untouched on any failure except XAPO_E_FORMAT_UNSUPPORTED
	// RETURN VALUE:
	//  COM error code, including:
	//    S_OK                      - input/output configuration supported, ppSupportedOutputFormat left untouched
	//    FORMAT_UNSUPPORTED        - input/output configuration unsupported, ppSupportedOutputFormat receives pointer to nearest output format supported if not NULL
	//    E_INVALIDARG              - either audio format invalid, ppSupportedOutputFormat left untouched
	IsOutputFormatSupported:   proc "stdcall" (this: ^IXAPO, pInputFormat: ^sys_windows.WAVEFORMATEX, pRequestedOutputFormat: ^sys_windows.WAVEFORMATEX, ppSupportedOutputFormat: ^^sys_windows.WAVEFORMATEX) -> sys_windows.HRESULT,
	// DESCRIPTION:
	//  Performs any effect-specific initialization if required.
	// REMARKS:
	//  The contents of pData are defined by the XAPO.
	//  Immutable variables (constant during the lifespan of the XAPO) should be set once via this method.
	//  Once initialized, an XAPO cannot be initialized again.
	//  An XAPO should be initialized before passing it to XAudio2 as part of an effect chain.  XAudio2 will not call this method; it exists for future content-driven initialization.
	// PARAMETERS:
	//  pData        - [in] effect-specific initialization parameters, may be NULL if DataByteSize == 0
	//  DataByteSize - [in] size of pData in bytes, may be 0 if pData is NULL
	// RETURN VALUE:
	//  COM error code
	Initialize:                proc "stdcall" (this: ^IXAPO, pData: rawptr, DataByteSize: u32) -> sys_windows.HRESULT,
	// DESCRIPTION:
	//  Resets variables dependent on frame history.
	// REMARKS:
	//  All other variables remain unchanged, including variables set by IXAPOParameters.SetParameters.
	//  For example, an effect with delay should zero out its delay line during this method, but should not reallocate anything as the
	//  XAPO remains locked with a constant input/output configuration. XAudio2 calls this method only if the XAPO is locked.
	//  This method should not block as it is called from the realtime thread.
	// PARAMETERS:
	//  void
	// RETURN VALUE:
	//  void
	Reset:                     proc "stdcall" (this: ^IXAPO),
	// DESCRIPTION:
	//  Locks the XAPO to a specific input/output configuration,
	//  allowing it to do any final initialization before Process
	//  is called on the realtime thread.
	// REMARKS:
	//  Once locked, the input/output configuration and any other locked variables remain constant until UnlockForProcess is called.
	//  XAPOs should assert the input/output configuration is supported and that any required effect-specific initialization is complete.
	//  IsInputFormatSupported, IsOutputFormatSupported, and Initialize should be called as necessary before this method is called.
	//  All internal memory buffers required for Process should be allocated by the time this method returns successfully as Process is non-blocking and should not allocate memory.
	//  Once locked, an XAPO cannot be locked again until UnLockForProcess is called.
	// PARAMETERS:
	//  InputLockedParameterCount  - [in] number of input buffers, must be within [XAPO_REGISTRATION_PROPERTIES.MinInputBufferCount, XAPO_REGISTRATION_PROPERTIES.MaxInputBufferCount]
	//  pInputLockedParameters     - [in] array of input locked buffer parameter structures, may be NULL if InputLockedParameterCount == 0, otherwise must have InputLockedParameterCount elements
	//  OutputLockedParameterCount - [in] number of output buffers, must be within [XAPO_REGISTRATION_PROPERTIES.MinOutputBufferCount, XAPO_REGISTRATION_PROPERTIES.MaxOutputBufferCount], must match InputLockedParameterCount when XAPO_FLAG_BUFFERCOUNT_MUST_MATCH used
	//  pOutputLockedParameters    - [in] array of output locked buffer parameter structures, may be NULL if OutputLockedParameterCount == 0, otherwise must have OutputLockedParameterCount elements
	// RETURN VALUE:
	//  COM error code
	LockForProcess:            proc "stdcall" (this: ^IXAPO, InputLockedParameterCount: u32, pInputLockedParameters: [^]XAPO_LOCKFORPROCESS_BUFFER_PARAMETERS, OutputLockedParameterCount: u32, pOutputLockedParameters: [^]XAPO_LOCKFORPROCESS_BUFFER_PARAMETERS) -> sys_windows.HRESULT,
	// DESCRIPTION:
	//  Opposite of LockForProcess.  Variables allocated during LockForProcess should be deallocated by this method.
	// REMARKS:
	//  Unlocking an XAPO allows an XAPO instance to be reused with different input/output configurations.
	// PARAMETERS:
	//  void
	// RETURN VALUE:
	//  void
	UnlockForProcess:          proc "stdcall" (this: ^IXAPO),
	// DESCRIPTION:
	//  Runs the XAPO's DSP code on the given input/output buffers.
	// REMARKS:
	//  In addition to writing to the output buffers as appropriate, an XAPO must set the BufferFlags and ValidFrameCount members of all elements in pOutputProcessParameters accordingly.
	//  ppInputProcessParameters will not necessarily be the same as ppOutputProcessParameters for in-place processing, rather the pBuffer members of each will point to the same memory.
	//  Multiple input/output buffers may be used with in-place XAPOs, though the input buffer count must equal the output buffer count.
	//  When multiple input/output buffers are used with in-place XAPOs, the XAPO may assume input buffer [N] equals output buffer [N].
	//  When IsEnabled is FALSE, the XAPO should process thru. Thru processing means an XAPO should not apply its normal processing to the given input/output buffers during Process.
	//  It should instead pass data from input to output with as little modification possible.  Effects that perform format conversion should continue to do so.
	//  The effect must ensure transitions between normal and thru processing do not introduce discontinuities into the signal.
	//  XAudio2 calls this method only if the XAPO is locked. This method should not block as it is called from the realtime thread.
	// PARAMETERS:
	//  InputProcessParameterCount  - [in]     number of input buffers, matches respective InputLockedParameterCount parameter given to LockForProcess
	//  pInputProcessParameters     - [in]     array of input process buffer parameter structures, may be NULL if InputProcessParameterCount == 0, otherwise must have InputProcessParameterCount elements
	//  OutputProcessParameterCount - [in]     number of output buffers, matches respective OutputLockedParameterCount parameter given to LockForProcess
	//  pOutputProcessParameters    - [in/out] array of output process buffer parameter structures, may be NULL if OutputProcessParameterCount == 0, otherwise must have OutputProcessParameterCount elements
	//  IsEnabled                   - [in]     TRUE to process normally, FALSE to process thru
	// RETURN VALUE:
	//  void
	Process:                   proc "stdcall" (this: ^IXAPO, InputProcessParameterCount: u32, pInputProcessParameters: [^]XAPO_PROCESS_BUFFER_PARAMETERS, OutputProcessParameterCount: u32, pOutputProcessParameters: [^]XAPO_PROCESS_BUFFER_PARAMETERS, IsEnabled: b32),
	// DESCRIPTION:
	//  Returns the number of input frames required to generate the requested number of output frames.
	// REMARKS:
	//  XAudio2 may call this method to determine how many input frames an XAPO requires.
	//  This is constant for locked CBR XAPOs; this method need only be called once while an XAPO is locked.
	//  XAudio2 calls this method only if the XAPO is locked. This method should not block as it is called from the realtime thread.
	// PARAMETERS:
	//  OutputFrameCount - [in] requested number of output frames, must be within respective [0, XAPO_LOCKFORPROCESS_BUFFER_PARAMETERS.MaxFrameCount], always XAPO_LOCKFORPROCESS_BUFFER_PARAMETERS.MaxFrameCount for CBR/user-defined XAPOs
	// RETURN VALUE:
	//  number of input frames required
	CalcInputFrames:           proc "stdcall" (this: ^IXAPO, OutputFrameCount: u32) -> u32,
	// DESCRIPTION:
	//  Returns the number of output frames generated for the requested number of input frames.
	// REMARKS:
	//  XAudio2 may call this method to determine how many output frames an XAPO will generate.  This is constant for locked CBR XAPOs; this method need only be called once while an XAPO is locked.
	//  XAudio2 calls this method only if the XAPO is locked. This method should not block as it is called from the realtime thread.
	// PARAMETERS:
	//  InputFrameCount - [in] requested number of input frames, must be within respective [0, XAPO_LOCKFORPROCESS_BUFFER_PARAMETERS.MaxFrameCount], always XAPO_LOCKFORPROCESS_BUFFER_PARAMETERS.MaxFrameCount for CBR/user-defined XAPOs
	// RETURN VALUE:
	//  number of output frames generated
	CalcOutputFrames:          proc "stdcall" (this: ^IXAPO, InputFrameCount: u32) -> u32,
}

IXAudio2 :: struct #raw_union {
	iunknown:        sys_windows.IUnknown,
	using ixaudio2_vtable: ^IXAudio2_VTable,
}

IXAudio2EngineCallback :: struct {
	using ixaudio2enginecallback_vtable: ^IXAudio2EngineCallback_VTable,
}

IXAudio2EngineCallback_VTable :: struct {
	// Called by XAudio2 just before an audio processing pass begins.
	OnProcessingPassStart: proc "stdcall" (this: ^IXAudio2EngineCallback),
	// Called just after an audio processing pass ends.
	OnProcessingPassEnd:   proc "stdcall" (this: ^IXAudio2EngineCallback),
	// Called in the event of a critical system error which requires XAudio2 to be closed down and restarted. The error code is given in Error.
	OnCriticalError:       proc "stdcall" (this: ^IXAudio2EngineCallback, Error: sys_windows.HRESULT),
}

IXAudio2Extension :: struct #raw_union {
	iunknown:                 sys_windows.IUnknown,
	using ixaudio2extension_vtable: ^IXAudio2Extension_VTable,
}

IXAudio2Extension_VTable :: struct {
	using iunknown_vtable: sys_windows.IUnknown_VTable,
	// NAME: IXAudio2Extension.GetProcessingQuantum
	// DESCRIPTION: Returns the processing quantum
	//              quantumMilliseconds = (1000.0f * quantumNumerator / quantumDenominator)
	// ARGUMENTS:
	//  quantumNumerator - Quantum numerator
	//  quantumDenominator - Quantum denominator
	GetProcessingQuantum: proc "stdcall" (this: ^IXAudio2Extension, quantumNumerator: ^u32, quantumDenominator: ^u32),
	// NAME: IXAudio2Extension.GetProcessor
	// DESCRIPTION: Returns the number of the processor used by XAudio2
	// ARGUMENTS:
	//  processor - Non-zero Processor number
	GetProcessor:         proc "stdcall" (this: ^IXAudio2Extension, processor: ^PROCESSOR_FLAGS),
}

IXAudio2MasteringVoice :: struct #raw_union {
	ixaudio2voice:                 IXAudio2Voice,
	using ixaudio2masteringvoice_vtable: ^IXAudio2MasteringVoice_VTable,
}

IXAudio2MasteringVoice_VTable :: struct {
	using ixaudio2voice_vtable: IXAudio2Voice_VTable,
	// NAME: IXAudio2MasteringVoice.GetChannelMask
	// DESCRIPTION: Returns the channel mask for this voice
	// ARGUMENTS:
	//  pChannelMask - returns the channel mask for this voice.  This corresponds to the dwChannelMask member of WAVEFORMATEXTENSIBLE.
	GetChannelMask:       proc "stdcall" (this: ^IXAudio2MasteringVoice, pChannelmask: ^u32) -> sys_windows.HRESULT,
}

IXAudio2SourceVoice :: struct #raw_union {
	ixaudio2voice:              IXAudio2Voice,
	using ixaudio2sourcevoice_vtable: ^IXAudio2SourceVoice_VTable,
}

IXAudio2SourceVoice_VTable :: struct {
	using ixaudio2voice_vtable: IXAudio2Voice_VTable,
	// NAME: IXAudio2SourceVoice.Start
	// DESCRIPTION: Makes this voice start consuming and processing audio.
	// ARGUMENTS:
	//  Flags - Flags controlling how the voice should be started.
	//  OperationSet - Used to identify this call as part of a deferred batch.
	Start:                proc "stdcall" (this: ^IXAudio2SourceVoice, Flags: FLAGS = {}, OperationSet: u32 = COMMIT_NOW) -> sys_windows.HRESULT,
	// NAME: IXAudio2SourceVoice.Stop
	// DESCRIPTION: Makes this voice stop consuming audio.
	// ARGUMENTS:
	//  Flags - Flags controlling how the voice should be stopped.
	//  OperationSet - Used to identify this call as part of a deferred batch.
	Stop:                 proc "stdcall" (this: ^IXAudio2SourceVoice, Flags: FLAGS = {}, OperationSet: u32 = COMMIT_NOW) -> sys_windows.HRESULT,
	// NAME: IXAudio2SourceVoice.SubmitSourceBuffer
	// DESCRIPTION: Adds a new audio buffer to this voice's input queue.
	// ARGUMENTS:
	//  pBuffer - Pointer to the buffer structure to be queued.
	//  pBufferWMA - Additional structure used only when submitting XWMA data.
	SubmitSourceBuffer:   proc "stdcall" (this: ^IXAudio2SourceVoice, pBuffer: ^BUFFER, pBufferWMA: ^BUFFER_WMA = nil) -> sys_windows.HRESULT,
	// NAME: IXAudio2SourceVoice.FlushSourceBuffers
	// DESCRIPTION: Removes all pending audio buffers from this voice's queue.
	FlushSourceBuffers:   proc "stdcall" (this: ^IXAudio2SourceVoice) -> sys_windows.HRESULT,
	// NAME: IXAudio2SourceVoice.Discontinuity
	// DESCRIPTION: Notifies the voice of an intentional break in the stream of audio buffers (e.g. the end of a sound), to prevent XAudio2 from interpreting an empty buffer queue as a glitch.
	Discontinuity:        proc "stdcall" (this: ^IXAudio2SourceVoice) -> sys_windows.HRESULT,
	// NAME: IXAudio2SourceVoice.ExitLoop
	// DESCRIPTION: Breaks out of the current loop when its end is reached.
	// ARGUMENTS:
	//  OperationSet - Used to identify this call as part of a deferred batch.
	ExitLoop:             proc "stdcall" (this: ^IXAudio2SourceVoice, OperationSet: u32 = COMMIT_NOW) -> sys_windows.HRESULT,
	// NAME: IXAudio2SourceVoice.GetState
	// DESCRIPTION: Returns the number of buffers currently queued on this voice, the pContext value associated with the currently processing buffer (if any), and other voice state information.
	// ARGUMENTS:
	//  pVoiceState - Returns the state information.
	//  Flags - Flags controlling what voice state is returned.
	GetState:             proc "stdcall" (this: ^IXAudio2SourceVoice, pVoiceState: ^VOICE_STATE, Flags: FLAGS = {}),
	// NAME: IXAudio2SourceVoice.SetFrequencyRatio
	// DESCRIPTION: Sets this voice's frequency adjustment, i.e. its pitch.
	// ARGUMENTS:
	//  Ratio - Frequency change, expressed as source frequency / target frequency.
	//  OperationSet - Used to identify this call as part of a deferred batch.
	SetFrequencyRatio:    proc "stdcall" (this: ^IXAudio2SourceVoice, Ratio: f32, OperationSet: u32 = COMMIT_NOW) -> sys_windows.HRESULT,
	// NAME: IXAudio2SourceVoice.GetFrequencyRatio
	// DESCRIPTION: Returns this voice's current frequency adjustment ratio.
	// ARGUMENTS:
	//  pRatio - Returns the frequency adjustment.
	GetFrequencyRatio:    proc "stdcall" (this: ^IXAudio2SourceVoice, pRatio: ^f32),
	// NAME: IXAudio2SourceVoice.SetSourceSampleRate
	// DESCRIPTION: Reconfigures this voice to treat its source data as being at a different sample rate than the original one specified in CreateSourceVoice's pSourceFormat argument.
	// ARGUMENTS:
	//  UINT32 - The intended sample rate of further submitted source data.
	SetSourceSampleRate:  proc "stdcall" (this: ^IXAudio2SourceVoice, NewSourceSampleRate: u32) -> sys_windows.HRESULT,
}

IXAudio2SubmixVoice :: struct #raw_union {
	ixaudio2voice:              IXAudio2Voice,
	using ixaudio2submixvoice_vtable: ^IXAudio2SubmixVoice_VTable,
}

IXAudio2SubmixVoice_VTable :: struct {
	using ixaudio2voice_vtable: IXAudio2Voice_VTable,
}

IXAudio2Voice :: struct {
	using ixaudio2voice_vtable: ^IXAudio2Voice_VTable,
}

IXAudio2VoiceCallback :: struct {
	using ixaudio2voicecallback_vtable: ^IXAudio2VoiceCallback_VTable,
}

IXAudio2VoiceCallback_VTable :: struct {
	// Called just before this voice's processing pass begins.
	OnVoiceProcessingPassStart: proc "stdcall" (this: ^IXAudio2VoiceCallback, BytesRequired: u32),
	// Called just after this voice's processing pass ends.
	OnVoiceProcessingPassEnd:   proc "stdcall" (this: ^IXAudio2VoiceCallback),
	// Called when this voice has just finished playing a buffer stream (as marked with the END_OF_STREAM flag on the last buffer).
	OnStreamEnd:                proc "stdcall" (this: ^IXAudio2VoiceCallback),
	// Called when this voice is about to start processing a new buffer.
	OnBufferStart:              proc "stdcall" (this: ^IXAudio2VoiceCallback, pBufferContext: rawptr),
	// Called when this voice has just finished processing a buffer.
	// The buffer can now be reused or destroyed.
	OnBufferEnd:                proc "stdcall" (this: ^IXAudio2VoiceCallback, pBufferContext: rawptr),
	// Called when this voice has just reached the end position of a loop.
	OnLoopEnd:                  proc "stdcall" (this: ^IXAudio2VoiceCallback, pBufferContext: rawptr),
	// Called in the event of a critical error during voice processing, such as a failing xAPO or an error from the hardware XMA decoder.
	// The voice may have to be destroyed and re-created to recover from the error.
	// The callback arguments report which buffer was being processed when the error occurred, and its HRESULT code.
	OnVoiceError:               proc "stdcall" (this: ^IXAudio2VoiceCallback, pBufferContext: rawptr, Error: sys_windows.HRESULT),
}

IXAudio2Voice_VTable :: struct {
	// NAME: IXAudio2Voice.GetVoiceDetails
	// DESCRIPTION: Returns the basic characteristics of this voice.
	// ARGUMENTS:
	//  pVoiceDetails - Returns the voice's details.
	GetVoiceDetails:           proc "stdcall" (this: ^IXAudio2Voice, pVoiceDetails: ^VOICE_DETAILS),
	// NAME: IXAudio2Voice.SetOutputVoices
	// DESCRIPTION: Replaces the set of submix/mastering voices that receive
	//              this voice's output.
	// ARGUMENTS:
	//  pSendList - Optional list of voices this voice should send audio to.
	SetOutputVoices:           proc "stdcall" (this: ^IXAudio2Voice, pSendList: [^]VOICE_SENDS) -> sys_windows.HRESULT,
	// NAME: IXAudio2Voice.SetEffectChain
	// DESCRIPTION: Replaces this voice's current effect chain with a new one.
	// ARGUMENTS:
	//  pEffectChain - Structure describing the new effect chain to be used.
	SetEffectChain:            proc "stdcall" (this: ^IXAudio2Voice, pEffectChain: ^EFFECT_CHAIN) -> sys_windows.HRESULT,
	// NAME: IXAudio2Voice.EnableEffect
	// DESCRIPTION: Enables an effect in this voice's effect chain.
	// ARGUMENTS:
	//  EffectIndex - Index of an effect within this voice's effect chain.
	//  OperationSet - Used to identify this call as part of a deferred batch.
	EnableEffect:              proc "stdcall" (this: ^IXAudio2Voice, EffectIndex: u32, OperationSet: u32 = COMMIT_NOW) -> sys_windows.HRESULT,
	// NAME: IXAudio2Voice.DisableEffect
	// DESCRIPTION: Disables an effect in this voice's effect chain.
	// ARGUMENTS:
	//  EffectIndex - Index of an effect within this voice's effect chain.
	//  OperationSet - Used to identify this call as part of a deferred batch.
	DisableEffect:             proc "stdcall" (this: ^IXAudio2Voice, EffectIndex: u32, OperationSet: u32 = COMMIT_NOW) -> sys_windows.HRESULT,
	// NAME: IXAudio2Voice.GetEffectState
	// DESCRIPTION: Returns the running state of an effect.
	// ARGUMENTS:
	//  EffectIndex - Index of an effect within this voice's effect chain.
	//  pEnabled - Returns the enabled/disabled state of the given effect.
	GetEffectState:            proc "stdcall" (this: ^IXAudio2Voice, EffectIndex: u32, pEnabled: ^b32),
	// NAME: IXAudio2Voice.SetEffectParameters
	// DESCRIPTION: Sets effect-specific parameters.
	// REMARKS: Unlike IXAPOParameters.SetParameters, this method may be called from any thread. XAudio2 implements appropriate synchronization to copy the parameters to the realtime audio processing thread.
	// ARGUMENTS:
	//  EffectIndex - Index of an effect within this voice's effect chain.
	//  pParameters - Pointer to an effect-specific parameters block.
	//  ParametersByteSize - Size of the pParameters array  in bytes.
	//  OperationSet - Used to identify this call as part of a deferred batch.
	SetEffectParameters:       proc "stdcall" (this: ^IXAudio2Voice, EffectIndex: u32, pParameters: rawptr, ParametersByteSize: u32, OperationSet: u32 = COMMIT_NOW) -> sys_windows.HRESULT,
	// NAME: IXAudio2Voice.GetEffectParameters
	// DESCRIPTION: Obtains the current effect-specific parameters.
	// ARGUMENTS:
	//  EffectIndex - Index of an effect within this voice's effect chain.
	//  pParameters - Returns the current values of the effect-specific parameters.
	//  ParametersByteSize - Size of the pParameters array in bytes.
	GetEffectParameters:       proc "stdcall" (this: ^IXAudio2Voice, EffectIndex: u32, pParameters: rawptr, ParametersByteSize: u32) -> sys_windows.HRESULT,
	// NAME: IXAudio2Voice.SetFilterParameters
	// DESCRIPTION: Sets this voice's filter parameters.
	// ARGUMENTS:
	//  pParameters - Pointer to the filter's parameter structure.
	//  OperationSet - Used to identify this call as part of a deferred batch.
	SetFilterParameters:       proc "stdcall" (this: ^IXAudio2Voice, pParameters: ^FILTER_PARAMETERS, OperationSet: u32 = COMMIT_NOW) -> sys_windows.HRESULT,
	// NAME: IXAudio2Voice.GetFilterParameters
	// DESCRIPTION: Returns this voice's current filter parameters.
	// ARGUMENTS:
	//  pParameters - Returns the filter parameters.
	GetFilterParameters:       proc "stdcall" (this: ^IXAudio2Voice, pParameters: ^FILTER_PARAMETERS),
	// NAME: IXAudio2Voice.SetOutputFilterParameters
	// DESCRIPTION: Sets the filter parameters on one of this voice's sends.
	// ARGUMENTS:
	//  pDestinationVoice - Destination voice of the send whose filter parameters will be set.
	//  pParameters - Pointer to the filter's parameter structure.
	//  OperationSet - Used to identify this call as part of a deferred batch.
	SetOutputFilterParameters: proc "stdcall" (this: ^IXAudio2Voice, pDestinationVoice: ^IXAudio2Voice, pParameters: ^FILTER_PARAMETERS, OperationSet: u32 = COMMIT_NOW) -> sys_windows.HRESULT,
	// NAME: IXAudio2Voice.GetOutputFilterParameters
	// DESCRIPTION: Returns the filter parameters from one of this voice's sends.
	// ARGUMENTS:
	//  pDestinationVoice - Destination voice of the send whose filter parameters will be read.
	//  pParameters - Returns the filter parameters.
	GetOutputFilterParameters: proc "stdcall" (this: ^IXAudio2Voice, pDestinationVoice: ^IXAudio2Voice, pParameters: ^FILTER_PARAMETERS),
	// NAME: IXAudio2Voice.SetVolume
	// DESCRIPTION: Sets this voice's overall volume level.
	// ARGUMENTS:
	//  Volume - New overall volume level to be used, as an amplitude factor.
	//  OperationSet - Used to identify this call as part of a deferred batch.
	SetVolume:                 proc "stdcall" (this: ^IXAudio2Voice, Volume: f32, OperationSet: u32 = COMMIT_NOW) -> sys_windows.HRESULT,
	// NAME: IXAudio2Voice.GetVolume
	// DESCRIPTION: Obtains this voice's current overall volume level.
	// ARGUMENTS:
	//  pVolume: Returns the voice's current overall volume level.
	GetVolume:                 proc "stdcall" (this: ^IXAudio2Voice, pVolume: ^f32),
	// NAME: IXAudio2Voice.SetChannelVolumes
	// DESCRIPTION: Sets this voice's per-channel volume levels.
	// ARGUMENTS:
	//  Channels - Used to confirm the voice's channel count.
	//  pVolumes - Array of per-channel volume levels to be used.
	//  OperationSet - Used to identify this call as part of a deferred batch.
	SetChannelVolumes:         proc "stdcall" (this: ^IXAudio2Voice, Channels: u32, pVolumes: [^]f32, OperationSet: u32 = COMMIT_NOW) -> sys_windows.HRESULT,
	// NAME: IXAudio2Voice.GetChannelVolumes
	// DESCRIPTION: Returns this voice's current per-channel volume levels.
	// ARGUMENTS:
	//  Channels - Used to confirm the voice's channel count.
	//  pVolumes - Returns an array of the current per-channel volume levels.
	GetChannelVolumes:         proc "stdcall" (this: ^IXAudio2Voice, Channels: u32, pVolumes: [^]f32),
	// NAME: IXAudio2Voice.SetOutputMatrix
	// DESCRIPTION: Sets the volume levels used to mix from each channel of this voice's output audio to each channel of a given destination voice's input audio.
	// ARGUMENTS:
	//  pDestinationVoice - The destination voice whose mix matrix to change.
	//  SourceChannels - Used to confirm this voice's output channel count (the number of channels produced by the last effect in the chain).
	//  DestinationChannels - Confirms the destination voice's input channels.
	//  pLevelMatrix - Array of [SourceChannels * DestinationChannels] send levels. The level used to send from source channel S to destination channel D should be in pLevelMatrix[S + SourceChannels * D].
	//  OperationSet - Used to identify this call as part of a deferred batch.
	SetOutputMatrix:           proc "stdcall" (this: ^IXAudio2Voice, pDestinationVoice: ^IXAudio2Voice, SourceChannels: u32, DestinationChannels: u32, pLevelMatrix: [^]f32, OperationSet: u32 = COMMIT_NOW) -> sys_windows.HRESULT,
	// NAME: IXAudio2Voice.GetOutputMatrix
	// DESCRIPTION: Obtains the volume levels used to send each channel of this voice's output audio to each channel of a given destination voice's input audio.
	// ARGUMENTS:
	//  pDestinationVoice - The destination voice whose mix matrix to obtain.
	//  SourceChannels - Used to confirm this voice's output channel count (the number of channels produced by the last effect in the chain).
	//  DestinationChannels - Confirms the destination voice's input channels.
	//  pLevelMatrix - Array of send levels, as above.
	GetOutputMatrix:           proc "stdcall" (this: ^IXAudio2Voice, pDestinationVoice: ^IXAudio2Voice, SourceChannels: u32, DestinationChannels: u32, pLevelMatrix: [^]f32),
	// NAME: IXAudio2Voice.DestroyVoice
	// DESCRIPTION: Destroys this voice, stopping it if necessary and removing it from the XAudio2 graph.
	DestroyVoice:              proc "stdcall" (this: ^IXAudio2Voice),
}

IXAudio2_VTable :: struct {
	using iunknown_vtable:  sys_windows.IUnknown_VTable,
	// NAME: IXAudio2.RegisterForCallbacks
	// DESCRIPTION: Adds a new client to receive XAudio2's engine callbacks.
	// ARGUMENTS:
	//  pCallback - Callback interface to be called during each processing pass.
	RegisterForCallbacks:   proc "stdcall" (this: ^IXAudio2, pCallback: ^IXAudio2EngineCallback) -> sys_windows.HRESULT,
	// NAME: IXAudio2.UnregisterForCallbacks
	// DESCRIPTION: Removes an existing receiver of XAudio2 engine callbacks.
	// ARGUMENTS:
	//  pCallback - Previously registered callback interface to be removed.
	UnregisterForCallbacks: proc "stdcall" (this: ^IXAudio2, pCallback: ^IXAudio2EngineCallback),
	// NAME: IXAudio2.CreateSourceVoice
	// DESCRIPTION: Creates and configures a source voice.
	// ARGUMENTS:
	//  ppSourceVoice - Returns the new object's IXAudio2SourceVoice interface.
	//  pSourceFormat - Format of the audio that will be fed to the voice.
	//  Flags - VOICE flags specifying the source voice's behavior.
	//  MaxFrequencyRatio - Maximum SetFrequencyRatio argument to be allowed.
	//  pCallback - Optional pointer to a client-provided callback interface.
	//  pSendList - Optional list of voices this voice should send audio to.
	//  pEffectChain - Optional list of effects to apply to the audio data.
	CreateSourceVoice:      proc "stdcall" (this: ^IXAudio2, ppSourceVoice: ^^IXAudio2SourceVoice, pSourceFormat: ^sys_windows.WAVEFORMATEX, Flags: FLAGS = {}, MaxFrequencyRatio: f32 = DEFAULT_FREQ_RATIO, pCallback: ^IXAudio2VoiceCallback = nil, pSendList: [^]VOICE_SENDS = nil, pEffectChain: [^]EFFECT_CHAIN = nil) -> sys_windows.HRESULT,
	// NAME: IXAudio2.CreateSubmixVoice
	// DESCRIPTION: Creates and configures a submix voice.
	// ARGUMENTS:
	//  ppSubmixVoice - Returns the new object's IXAudio2SubmixVoice interface.
	//  InputChannels - Number of channels in this voice's input audio data.
	//  InputSampleRate - Sample rate of this voice's input audio data.
	//  Flags - VOICE flags specifying the submix voice's behavior.
	//  ProcessingStage - Arbitrary number that determines the processing order.
	//  pSendList - Optional list of voices this voice should send audio to.
	//  pEffectChain - Optional list of effects to apply to the audio data.
	CreateSubmixVoice:      proc "stdcall" (this: ^IXAudio2, ppSubmixVoice: ^^IXAudio2SubmixVoice, InputChannels: u32, InputSampleRate: u32, Flags: FLAGS = {}, ProcessingStage: u32 = 0, pSendList: [^]VOICE_SENDS = nil, pEffectChain: [^]EFFECT_CHAIN = nil) -> sys_windows.HRESULT,
	// NAME: IXAudio2.CreateMasteringVoice
	// DESCRIPTION: Creates and configures a mastering voice.
	// ARGUMENTS:
	//  ppMasteringVoice - Returns the new object's IXAudio2MasteringVoice interface.
	//  InputChannels - Number of channels in this voice's input audio data.
	//  InputSampleRate - Sample rate of this voice's input audio data.
	//  Flags - VOICE flags specifying the mastering voice's behavior.
	//  szDeviceId - Identifier of the device to receive the output audio.
	//  pEffectChain - Optional list of effects to apply to the audio data.
	//  StreamCategory - The audio stream category to use for this mastering voice
	CreateMasteringVoice:   proc "stdcall" (this: ^IXAudio2, ppMasteringVoice: ^^IXAudio2MasteringVoice, InputChannels: u32 = DEFAULT_CHANNELS, InputSampleRate: u32 = DEFAULT_SAMPLERATE, Flags: FLAGS = {}, szDeviceId: [^]u16 = nil, pEffectChain: [^]EFFECT_CHAIN = nil, StreamCategory: AUDIO_STREAM_CATEGORY = .GameEffects) -> sys_windows.HRESULT,
	// NAME: IXAudio2.:StartEngine
	// DESCRIPTION: Creates and starts the audio processing thread.
	StartEngine:            proc "stdcall" (this: ^IXAudio2) -> sys_windows.HRESULT,
	// NAME: IXAudio2.StopEngine
	// DESCRIPTION: Stops and destroys the audio processing thread.
	StopEngine:             proc "stdcall" (this: ^IXAudio2),
	// NAME: IXAudio2.CommitChanges
	// DESCRIPTION: Atomically applies a set of operations previously tagged
	//              with a given identifier.
	// ARGUMENTS:
	//  OperationSet - Identifier of the set of operations to be applied.
	CommitChanges:          proc "stdcall" (this: ^IXAudio2, OperationSet: u32) -> sys_windows.HRESULT,
	// NAME: IXAudio2.GetPerformanceData
	// DESCRIPTION: Returns current resource usage details: memory, CPU, etc.
	// ARGUMENTS:
	//  pPerfData - Returns the performance data structure.
	GetPerformanceData:     proc "stdcall" (this: ^IXAudio2, pPerfData: ^PERFORMANCE_DATA),
	// NAME: IXAudio2.SetDebugConfiguration
	// DESCRIPTION: Configures XAudio2's debug output (in debug builds only).
	// ARGUMENTS:
	//  pDebugConfiguration - Structure describing the debug output behavior.
	//  pReserved - Optional parameter; must be NULL.
	SetDebugConfiguration:  proc "stdcall" (this: ^IXAudio2, pDebugConfiguration: ^DEBUG_CONFIGURATION, pReserved: rawptr = nil),
}

LISTENER :: struct #packed {
	OrientFront: [3]f32,
	// orientation of front direction, used only for matrix and delay calculations or listeners with cones for matrix, LPF (both direct and reverb paths), and reverb calculations, must be normalized when used
	OrientTop:   [3]f32,
	// orientation of top direction, used only for matrix and delay calculations, must be orthonormal with OrientFront when used
	Position:    [3]f32,
	// position in user-defined world units, does not affect Velocity
	Velocity:    [3]f32,
	// velocity vector in user-defined world units/second, used only for doppler calculations, does not affect Position
	pCone:       ^CONE,
}

PERFORMANCE_DATA :: struct #packed {
	// CPU usage information
	AudioCyclesSinceLastQuery:  u64,
	// CPU cycles spent on audio processing since the last call to StartEngine or GetPerformanceData.
	TotalCyclesSinceLastQuery:  u64,
	// Total CPU cycles elapsed since the last call (only counts the CPU XAudio2 is running on).
	MinimumCyclesPerQuantum:    u32,
	// Fewest CPU cycles spent processing any one audio quantum since the last call.
	MaximumCyclesPerQuantum:    u32,
	// Memory usage information
	MemoryUsageInBytes:         u32,
	// Audio latency and glitching information
	CurrentLatencyInSamples:    u32,
	// Minimum delay from when a sample is read from a source buffer to when it reaches the speakers.
	GlitchesSinceEngineStarted: u32,
	// Data about XAudio2's current workload
	ActiveSourceVoiceCount:     u32,
	// Source voices currently playing.
	TotalSourceVoiceCount:      u32,
	// Source voices currently existing.
	ActiveSubmixVoiceCount:     u32,
	// Submix voices currently playing/existing.
	ActiveResamplerCount:       u32,
	// Resample xAPOs currently active.
	ActiveMatrixMixCount:       u32,
	// Usage of the hardware XMA decoder (Xbox 360 only)
	ActiveXmaSourceVoices:      u32,
	// Number of source voices decoding XMA data.
	ActiveXmaStreams:           u32,
}

PROCESOR_FLAG :: enum u32 {
	Processor1  = 0, 
	Processor2  = 1, 
	Processor3  = 2, 
	Processor4  = 3, 
	Processor5  = 4, 
	Processor6  = 5, 
	Processor7  = 6, 
	Processor8  = 7, 
	Processor9  = 8, 
	Processor10 = 9, 
	Processor11 = 10, 
	Processor12 = 11, 
	Processor13 = 12, 
	Processor14 = 13, 
	Processor15 = 14, 
	Processor16 = 15, 
	Processor17 = 16, 
	Processor18 = 17, 
	Processor19 = 18, 
	Processor20 = 19, 
	Processor21 = 20, 
	Processor22 = 21, 
	Processor23 = 22, 
	Processor24 = 23, 
	Processor25 = 24, 
	Processor26 = 25, 
	Processor27 = 26, 
	Processor28 = 27, 
	Processor29 = 28, 
	Processor30 = 29, 
	Processor31 = 30, 
	Processor32 = 31, 
}

PROCESSOR_FLAGS :: distinct bit_set[PROCESOR_FLAG; u32]

REVERB_I3DL2_PARAMETERS :: struct #packed {
	// ratio of wet (processed) signal to dry (original) signal
	WetDryMix:         f32,
	// Standard I3DL2 parameters
	Room:              i32,
	// [-10000, 0] in mB (hundredths of decibels)
	RoomHF:            i32,
	// [-10000, 0] in mB (hundredths of decibels)
	RoomRolloffFactor: f32,
	// [0.0, 10.0]
	DecayTime:         f32,
	// [0.1, 20.0] in seconds
	DecayHFRatio:      f32,
	// [0.1, 2.0]
	Reflections:       i32,
	// [-10000, 1000] in mB (hundredths of decibels)
	ReflectionsDelay:  f32,
	// [0.0, 0.3] in seconds
	Reverb:            i32,
	// [-10000, 2000] in mB (hundredths of decibels)
	ReverbDelay:       f32,
	// [0.0, 0.1] in seconds
	Diffusion:         f32,
	// [0.0, 100.0] (percentage)
	Density:           f32,
	// [0.0, 100.0] (percentage)
	HFReference:       f32,
}

REVERB_PARAMETERS :: struct #packed {
	// ratio of wet (processed) signal to dry (original) signal
	WetDryMix:           f32,
	// Delay times
	ReflectionsDelay:    u32,
	// [0, 300] in ms
	ReverbDelay:         u8,
	// [0, 85] in ms
	RearDelay:           u8,
	// 7.1: [0, 20] in ms, all other: [0, 5] in ms
	SideDelay:           u8,
	// Indexed parameters
	PositionLeft:        u8,
	// [0, 30] no units
	PositionRight:       u8,
	// [0, 30] no units, ignored when configured to mono
	PositionMatrixLeft:  u8,
	// [0, 30] no units
	PositionMatrixRight: u8,
	// [0, 30] no units, ignored when configured to mono
	EarlyDiffusion:      u8,
	// [0, 15] no units
	LateDiffusion:       u8,
	// [0, 15] no units
	LowEQGain:           u8,
	// [0, 12] no units
	LowEQCutoff:         u8,
	// [0, 9] no units
	HighEQGain:          u8,
	// [0, 8] no units
	HighEQCutoff:        u8,
	// Direct parameters
	RoomFilterFreq:      f32,
	// [20, 20000] in Hz
	RoomFilterMain:      f32,
	// [-100, 0] in dB
	RoomFilterHF:        f32,
	// [-100, 0] in dB
	ReflectionsGain:     f32,
	// [-100, 20] in dB
	ReverbGain:          f32,
	// [-100, 20] in dB
	DecayTime:           f32,
	// [0.1, inf] in seconds
	Density:             f32,
	// [0, 100] (percentage)
	RoomSize:            f32,
	// component control
	DisableLateField:    b32,
}

SEND_DESCRIPTOR :: struct #packed {
	Flags:        FLAGS,
	// Either 0 or SEND_USEFILTER.
	pOutputVoice: ^IXAudio2Voice,
}

SPEAKER_FLAG :: enum u32 {
	FRONT_LEFT            = 0, 
	FRONT_RIGHT           = 1, 
	FRONT_CENTER          = 2, 
	LOW_FREQUENCY         = 3, 
	BACK_LEFT             = 4, 
	BACK_RIGHT            = 5, 
	FRONT_LEFT_OF_CENTER  = 6, 
	FRONT_RIGHT_OF_CENTER = 7, 
	BACK_CENTER           = 8, 
	SIDE_LEFT             = 9, 
	SIDE_RIGHT            = 10, 
	TOP_CENTER            = 11, 
	TOP_FRONT_LEFT        = 12, 
	TOP_FRONT_CENTER      = 13, 
	TOP_FRONT_RIGHT       = 14, 
	TOP_BACK_LEFT         = 15, 
	TOP_BACK_CENTER       = 16, 
	TOP_BACK_RIGHT        = 17, 
	// RESERVED            = 0x7FFC0000, // bit mask locations reserved for future use
	ALL                   = 31, // used to specify that any possible permutation of speaker configurations
}

SPEAKER_FLAGS :: distinct bit_set[SPEAKER_FLAG; u32]

VECTOR :: [3]f32

VOICE_DETAILS :: struct #packed {
	CreatingFlags:   FLAGS,
	ActiveFlags:     FLAGS,
	InputChannels:   u32,
	InputSampleRate: u32,
}

VOICE_SENDS :: struct #packed {
	SendCount: u32,
	// Number of sends from this voice.
	pSends:    [^]SEND_DESCRIPTOR,
}

VOICE_STATE :: struct #packed {
	pCurrentBufferContext: rawptr,
	// The pContext value provided in the BUFFER that is currently being processed, or NULL if there are no buffers in the queue.
	BuffersQueued:         u32,
	// Number of buffers currently queued on the voice (including the one that is being processed).
	SamplesPlayed:         u64,
}

VOLUMEMETER_LEVELS :: struct #packed {
	pPeakLevels:  [^]f32 `fmt:"v,ChannelCount"`,
	// Peak levels table: receives maximum absolute level for each channel over a processing pass, may be NULL if pRMSLevls != NULL, otherwise must have at least ChannelCount elements.
	pRMSLevels:   [^]f32 `fmt:"v,ChannelCount"`,
	// Root mean square levels table: receives RMS level for each channel over a processing pass, may be NULL if pPeakLevels != NULL, otherwise must have at least ChannelCount elements.
	ChannelCount: u32,
}

WAVEFORMATEX :: sys_windows.WAVEFORMATEX

XAPO_BUFFER_FLAGS :: enum i32 {
	XAPO_BUFFER_SILENT, // silent data should be assumed, respective memory may be uninitialized
	XAPO_BUFFER_VALID,  // arbitrary data should be assumed (may or may not be silent frames), respective memory initialized
}

XAPO_FLAG :: enum u32 {
	// Number of channels of input and output buffers must match, applies to XAPO_LOCKFORPROCESS_BUFFER_PARAMETERS.pFormat.
	CHANNELS_MUST_MATCH      = 0, 
	// Framerate of input and output buffers must match, applies to XAPO_LOCKFORPROCESS_BUFFER_PARAMETERS.pFormat.
	FRAMERATE_MUST_MATCH     = 1, 
	// Bit depth of input and output buffers must match, applies to XAPO_LOCKFORPROCESS_BUFFER_PARAMETERS.pFormat.
	// Container size of input and output buffers must also match if XAPO_LOCKFORPROCESS_BUFFER_PARAMETERS.pFormat is WAVEFORMATEXTENSIBLE.
	BITSPERSAMPLE_MUST_MATCH = 2, 
	// Number of input and output buffers must match, applies to XAPO_LOCKFORPROCESS_BUFFER_PARAMETERS.
	// Also, XAPO_REGISTRATION_PROPERTIES.MinInputBufferCount must equal XAPO_REGISTRATION_PROPERTIES.MinOutputBufferCount and XAPO_REGISTRATION_PROPERTIES.MaxInputBufferCount must equal XAPO_REGISTRATION_PROPERTIES.MaxOutputBufferCount when used.
	BUFFERCOUNT_MUST_MATCH   = 3, 
	// XAPO must be run in-place.  Use this flag only if your DSP implementation cannot process separate input and output buffers.
	// If set, the following flags must also be set:
	//     XAPO_FLAG_CHANNELS_MUST_MATCH
	//     XAPO_FLAG_FRAMERATE_MUST_MATCH
	//     XAPO_FLAG_BITSPERSAMPLE_MUST_MATCH
	//     XAPO_FLAG_BUFFERCOUNT_MUST_MATCH
	//     XAPO_FLAG_INPLACE_SUPPORTED
	// Multiple input and output buffers may be used with in-place XAPOs, though the input buffer count must equal the output buffer count.
	// When multiple input/output buffers are used, the XAPO may assume input buffer [N] equals output buffer [N] for in-place processing.
	INPLACE_REQUIRED         = 5, 
	// XAPO may be run in-place.  If the XAPO is used in a chain such that the requirements for XAPO_FLAG_INPLACE_REQUIRED are met, XAudio2 will ensure the XAPO is run in-place.
	// If not met, XAudio2 will still run the XAPO albeit with separate input and output buffers.
	// For example, consider an effect which may be ran in stereo->5.1 mode or mono->mono mode.  When set to stereo->5.1, it will be run with separate input and output buffers as format conversion is not permitted in-place.
	// However, if configured to run mono->mono, the same XAPO can be run in-place.  Thus the same implementation may be conveniently reused for various input/output configurations, while taking advantage of in-place processing when possible.
	INPLACE_SUPPORTED        = 4, 
}

XAPO_FLAGS :: distinct bit_set[XAPO_FLAG; u32]

XAPO_LOCKFORPROCESS_BUFFER_PARAMETERS :: struct #packed {
	pFormat:       ^sys_windows.WAVEFORMATEX,
	// buffer audio format
	MaxFrameCount: u32,
}

XAPO_PROCESS_BUFFER_PARAMETERS :: struct #packed {
	pBuffer:         rawptr,
	// audio data buffer, must be non-NULL
	BufferFlags:     XAPO_BUFFER_FLAGS,
	// describes assumed content of pBuffer, does not affect ValidFrameCount
	ValidFrameCount: u32,
}

XAPO_REGISTRATION_PROPERTIES :: struct #packed {
	clsid:                sys_windows.GUID,
	// COM class ID, used with CoCreate
	FriendlyName:         [256]u16,
	// friendly name unicode string
	CopyrightInfo:        [256]u16,
	// copyright information unicode string
	MajorVersion:         u32,
	// major version
	MinorVersion:         u32,
	// minor version
	Flags:                XAPO_FLAGS,
	// XAPO property flags, describes supported input/output configuration
	MinInputBufferCount:  u32,
	// minimum number of input buffers required for processing, can be 0
	MaxInputBufferCount:  u32,
	// maximum number of input buffers supported for processing, must be >= MinInputBufferCount
	MinOutputBufferCount: u32,
	// minimum number of output buffers required for processing, can be 0, must match MinInputBufferCount when XAPO_FLAG_BUFFERCOUNT_MUST_MATCH used
	MaxOutputBufferCount: u32,
}

COMMIT_ALL: int : 0

COMMIT_NOW: int : 0

DEFAULT_CHANNELS: int : 0

DEFAULT_FILTER_FREQUENCY: f64 : MAX_FILTER_FREQUENCY

DEFAULT_FILTER_ONEOVERQ: f64 : 1.0

DEFAULT_FILTER_TYPE :: FILTER_TYPE.LowPassFilter

DEFAULT_FREQ_RATIO: f64 : 2.0

DEFAULT_SAMPLERATE: int : 0

DEVICE_INVALIDATED :: HRESULT(-2003435516)

FXECHO_DEFAULT_DELAY: f64 : 500.0

FXECHO_DEFAULT_FEEDBACK: f64 : 0.5

FXECHO_DEFAULT_WETDRYMIX: f64 : 0.5

FXECHO_MAX_DELAY: f64 : 2000.0

FXECHO_MAX_FEEDBACK: f64 : 1.0

FXECHO_MAX_WETDRYMIX: f64 : 1.0

FXECHO_MIN_DELAY: f64 : 1.0

FXECHO_MIN_FEEDBACK: f64 : 0.0

FXECHO_MIN_WETDRYMIX: f64 : 0.0

FXEQ_DEFAULT_BANDWIDTH: f64 : 1.0

FXEQ_DEFAULT_FREQUENCY_CENTER_0: f64 : 100.0

FXEQ_DEFAULT_FREQUENCY_CENTER_1: f64 : 800.0

FXEQ_DEFAULT_FREQUENCY_CENTER_2: f64 : 2000.0

FXEQ_DEFAULT_FREQUENCY_CENTER_3: f64 : 10000.0

FXEQ_DEFAULT_GAIN: f64 : 1.0

FXEQ_MAX_BANDWIDTH: f64 : 2.0

FXEQ_MAX_FRAMERATE: int : 48000

FXEQ_MAX_FREQUENCY_CENTER: f64 : 20000.0

FXEQ_MAX_GAIN: f64 : 7.94

FXEQ_MIN_BANDWIDTH: f64 : 0.1

FXEQ_MIN_FRAMERATE: int : 22000

FXEQ_MIN_FREQUENCY_CENTER: f64 : 20.0

FXEQ_MIN_GAIN: f64 : 0.126

FXEQ_UUID_STRING: string : "F5E01117-D6C4-485A-A3F5-695196F3DBFA"

FXEcho_UUID_STRING: string : "5039D740-F736-449A-84D3-A56202557B87"

FXLOUDNESS_DEFAULT_MOMENTARY_MS: int : 400

FXLOUDNESS_DEFAULT_SHORTTERM_MS: int : 3000

FXMASTERINGLIMITER_DEFAULT_LOUDNESS: int : 1000

FXMASTERINGLIMITER_DEFAULT_RELEASE: int : 6

FXMASTERINGLIMITER_MAX_LOUDNESS: int : 1800

FXMASTERINGLIMITER_MAX_RELEASE: int : 20

FXMASTERINGLIMITER_MIN_LOUDNESS: int : 1

FXMASTERINGLIMITER_MIN_RELEASE: int : 1

FXMasteringLimiter_UUID_STRING: string : "C4137916-2BE1-46FD-8599-441536F49856"

FXREVERB_DEFAULT_DIFFUSION: f64 : 0.9

FXREVERB_DEFAULT_ROOMSIZE: f64 : 0.6

FXREVERB_MAX_DIFFUSION: f64 : 1.0

FXREVERB_MAX_ROOMSIZE: f64 : 1.0

FXREVERB_MIN_DIFFUSION: f64 : 0.0

FXREVERB_MIN_ROOMSIZE: f64 : 0.0001

FXReverb_UUID_STRING: string : "7D9ACA56-CB68-4807-B632-B137352E8596"

HANDLE_BYTESIZE: int : 20

INVALID_CALL :: HRESULT(-2003435519)

INVALID_OPSET: int : 0xffffffff

IXAPOParameters_UUID_STRING: string : "26D95C66-80F2-499A-AD54-5AE7F01C6D98"

IXAPO_UUID_STRING: string : "A410B984-9839-4819-A0BE-2856AE6B3ADB"

IXAudio2Extension_UUID_STRING: string : "84ac29bb-d619-44d2-b197-e4acf7df3ed6"

IXAudio2_UUID_STRING: string : "2B02E3CF-2E0B-4ec3-BE45-1B2A3FE7210D"

LOOP_INFINITE: int : 255

MAX_AUDIO_CHANNELS: int : 64

MAX_BUFFERS_SYSTEM: int : 2

MAX_BUFFER_BYTES: int : 0x80000000

MAX_FILTER_FREQUENCY: f64 : 1.0

MAX_FILTER_ONEOVERQ: f64 : 1.5

MAX_FREQ_RATIO: f64 : 1024.0

MAX_INSTANCES: int : 8

MAX_LOOP_COUNT: int : 254

MAX_QUEUED_BUFFERS: int : 64

MAX_RATIO_TIMES_RATE_XMA_MONO: int : 600000

MAX_RATIO_TIMES_RATE_XMA_MULTICHANNEL: int : 300000

MAX_SAMPLE_RATE: int : 200000

MAX_VOLUME_LEVEL: f64 : 16777216.0

MIN_FREQ_RATIO: f64 : 1.0 / 1024.0

MIN_SAMPLE_RATE: int : 1000

NO_LOOP_REGION: int : 0

QUANTUM_DENOMINATOR: int : 100

QUANTUM_MS: f64 : 1000.0 * QUANTUM_NUMERATOR / QUANTUM_DENOMINATOR

QUANTUM_NUMERATOR: int : 1

REVERB_DEFAULT_7POINT1_REAR_DELAY: int : 20

REVERB_DEFAULT_7POINT1_SIDE_DELAY: int : 5

REVERB_DEFAULT_DECAY_TIME: f64 : 1.0

REVERB_DEFAULT_DENSITY: f64 : 100.0

REVERB_DEFAULT_DISABLE_LATE_FIELD: b32 : false

REVERB_DEFAULT_EARLY_DIFFUSION: int : 8

REVERB_DEFAULT_HIGH_EQ_CUTOFF: int : 4

REVERB_DEFAULT_HIGH_EQ_GAIN: int : 8

REVERB_DEFAULT_LATE_DIFFUSION: int : 8

REVERB_DEFAULT_LOW_EQ_CUTOFF: int : 4

REVERB_DEFAULT_LOW_EQ_GAIN: int : 8

REVERB_DEFAULT_POSITION: int : 6

REVERB_DEFAULT_POSITION_MATRIX: int : 27

REVERB_DEFAULT_REAR_DELAY: int : 5

REVERB_DEFAULT_REFLECTIONS_DELAY: int : 5

REVERB_DEFAULT_REFLECTIONS_GAIN: f64 : 0.0

REVERB_DEFAULT_REVERB_DELAY: int : 5

REVERB_DEFAULT_REVERB_GAIN: f64 : 0.0

REVERB_DEFAULT_ROOM_FILTER_FREQ: f64 : 5000.0

REVERB_DEFAULT_ROOM_FILTER_HF: f64 : 0.0

REVERB_DEFAULT_ROOM_FILTER_MAIN: f64 : 0.0

REVERB_DEFAULT_ROOM_SIZE: f64 : 100.0

REVERB_DEFAULT_WET_DRY_MIX: f64 : 100.0

REVERB_MAX_7POINT1_REAR_DELAY: int : 20

REVERB_MAX_7POINT1_SIDE_DELAY: int : 5

REVERB_MAX_DENSITY: f64 : 100.0

REVERB_MAX_DIFFUSION: int : 15

REVERB_MAX_FRAMERATE: int : 48000

REVERB_MAX_HIGH_EQ_CUTOFF: int : 14

REVERB_MAX_HIGH_EQ_GAIN: int : 8

REVERB_MAX_LOW_EQ_CUTOFF: int : 9

REVERB_MAX_LOW_EQ_GAIN: int : 12

REVERB_MAX_POSITION: int : 30

REVERB_MAX_REAR_DELAY: int : 5

REVERB_MAX_REFLECTIONS_DELAY: int : 300

REVERB_MAX_REFLECTIONS_GAIN: f64 : 20.0

REVERB_MAX_REVERB_DELAY: int : 85

REVERB_MAX_REVERB_GAIN: f64 : 20.0

REVERB_MAX_ROOM_FILTER_FREQ: f64 : 20000.0

REVERB_MAX_ROOM_FILTER_HF: f64 : 0.0

REVERB_MAX_ROOM_FILTER_MAIN: f64 : 0.0

REVERB_MAX_ROOM_SIZE: f64 : 100.0

REVERB_MAX_WET_DRY_MIX: f64 : 100.0

REVERB_MIN_7POINT1_REAR_DELAY: int : 0

REVERB_MIN_7POINT1_SIDE_DELAY: int : 0

REVERB_MIN_DECAY_TIME: f64 : 0.1

REVERB_MIN_DENSITY: f64 : 0.0

REVERB_MIN_DIFFUSION: int : 0

REVERB_MIN_FRAMERATE: int : 20000

REVERB_MIN_HIGH_EQ_CUTOFF: int : 0

REVERB_MIN_HIGH_EQ_GAIN: int : 0

REVERB_MIN_LOW_EQ_CUTOFF: int : 0

REVERB_MIN_LOW_EQ_GAIN: int : 0

REVERB_MIN_POSITION: int : 0

REVERB_MIN_REAR_DELAY: int : 0

REVERB_MIN_REFLECTIONS_DELAY: int : 0

REVERB_MIN_REFLECTIONS_GAIN: f64 : -100.0

REVERB_MIN_REVERB_DELAY: int : 0

REVERB_MIN_REVERB_GAIN: f64 : -100.0

REVERB_MIN_ROOM_FILTER_FREQ: f64 : 20.0

REVERB_MIN_ROOM_FILTER_HF: f64 : -100.0

REVERB_MIN_ROOM_FILTER_MAIN: f64 : -100.0

REVERB_MIN_ROOM_SIZE: f64 : 0.0

REVERB_MIN_WET_DRY_MIX: f64 : 0.0

SPEAKER_2POINT1 :: SPEAKER_FLAGS{.FRONT_LEFT, .FRONT_RIGHT, .LOW_FREQUENCY}

SPEAKER_4POINT1 :: SPEAKER_FLAGS{.FRONT_LEFT, .FRONT_RIGHT, .LOW_FREQUENCY, .BACK_LEFT, .BACK_RIGHT}

SPEAKER_5POINT1 :: SPEAKER_FLAGS{.FRONT_LEFT, .FRONT_RIGHT, .FRONT_CENTER, .LOW_FREQUENCY, .BACK_LEFT, .BACK_RIGHT}

SPEAKER_5POINT1_SURROUND :: SPEAKER_FLAGS{.FRONT_LEFT, .FRONT_RIGHT, .FRONT_CENTER, .LOW_FREQUENCY, .SIDE_LEFT, .SIDE_RIGHT}

SPEAKER_7POINT1 :: SPEAKER_FLAGS{.FRONT_LEFT, .FRONT_RIGHT, .FRONT_CENTER, .LOW_FREQUENCY, .BACK_LEFT, .BACK_RIGHT, .FRONT_LEFT_OF_CENTER, .FRONT_RIGHT_OF_CENTER}

SPEAKER_7POINT1_SURROUND :: SPEAKER_FLAGS{.FRONT_LEFT, .FRONT_RIGHT, .FRONT_CENTER, .LOW_FREQUENCY, .BACK_LEFT, .BACK_RIGHT, .SIDE_LEFT, .SIDE_RIGHT}

SPEAKER_MONO :: SPEAKER_FLAGS{.FRONT_CENTER}

SPEAKER_QUAD :: SPEAKER_FLAGS{.FRONT_LEFT, .FRONT_RIGHT, .BACK_LEFT, .BACK_RIGHT}

SPEAKER_STEREO :: SPEAKER_FLAGS{.FRONT_LEFT, .FRONT_RIGHT}

SPEAKER_SURROUND :: SPEAKER_FLAGS{.FRONT_LEFT, .FRONT_RIGHT, .FRONT_CENTER, .BACK_CENTER}

SPEED_OF_SOUND: f64 : 343.5

USE_DEFAULT_PROCESSOR :: PROCESSOR_FLAGS{}

XAPO_CREATION_FAILED :: HRESULT(-2003435517)

XAPO_MAX_CHANNELS: int : 64

XAPO_MAX_FRAMERATE: int : 200000

XAPO_MIN_CHANNELS: int : 1

XAPO_MIN_FRAMERATE: int : 1000

XAPO_REGISTRATION_STRING_LENGTH: int : 256

XMA_DECODER_ERROR :: HRESULT(-2003435518)

Default_DirectionalCone: CONE = …

Default_LinearCurve: DISTANCE_CURVE = …

Default_LinearCurvePoints: [2]DISTANCE_CURVE_POINT = …

FORMAT_UNSUPPORTED: sys_windows.HRESULT = …

FXEQ_UUID: ^sys_windows.GUID = …

FXEcho_UUID: ^sys_windows.GUID = …

FXMasteringLimiter_UUID: ^sys_windows.GUID = …

FXReverb_UUID: ^sys_windows.GUID = …

I3DL2_PRESET_ALLEY: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_ARENA: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_AUDITORIUM: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_BATHROOM: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_CARPETEDHALLWAY: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_CAVE: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_CITY: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_CONCERTHALL: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_DEFAULT: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_FOREST: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_GENERIC: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_HALLWAY: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_HANGAR: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_LARGEHALL: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_LARGEROOM: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_LIVINGROOM: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_MEDIUMHALL: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_MEDIUMROOM: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_MOUNTAINS: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_PADDEDCELL: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_PARKINGLOT: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_PLAIN: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_PLATE: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_QUARRY: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_ROOM: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_SEWERPIPE: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_SMALLROOM: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_STONECORRIDOR: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_STONEROOM: REVERB_I3DL2_PARAMETERS = …

I3DL2_PRESET_UNDERWATER: REVERB_I3DL2_PARAMETERS = …

IXAPOParameters_UUID: ^sys_windows.GUID = …

IXAPO_UUID: ^sys_windows.GUID = …

IXAudio2Extension_UUID: ^sys_windows.GUID = …

IXAudio2_UUID: ^sys_windows.GUID = …

AmplitudeRatioToDecibels :: proc "contextless" (Volume: f32) -> f32 {…}

Calculate :: proc "c" (Instance: HANDLE, #by_ptr pListener: LISTENER, #by_ptr pEmitter: EMITTER, Flags: CALCULATE_FLAGS, pDSPSettings: ^DSP_SETTINGS) ---

Create :: proc "stdcall" (ppXAudio2: ^^IXAudio2, Flags: FLAGS = {}, XAudio2Processor: PROCESSOR_FLAGS = {.Processor1}) -> sys_windows.HRESULT {…}

CreateAudioReverb :: proc "stdcall" (ppApo: ^^sys_windows.IUnknown) -> sys_windows.HRESULT ---

CreateAudioVolumeMeter :: proc "stdcall" (ppApo: ^^sys_windows.IUnknown) -> sys_windows.HRESULT ---

CreateFX :: proc "c" (clsid: ^sys_windows.GUID, pEffect: ^^sys_windows.IUnknown, pInitDat: rawptr = nil, InitDataByteSize: u32 = 0) -> sys_windows.HRESULT ---

CutoffFrequencyToOnePoleCoefficient :: proc "contextless" (CutoffFrequency: f32, SampleRate: u32) -> f32 {…}

CutoffFrequencyToRadians :: proc "contextless" (CutoffFrequency: f32, SampleRate: u32) -> f32 {…}

DecibelsToAmplitudeRatio :: proc "contextless" (Decibels: f32) -> f32 {…}

FrequencyRatioToSemitones :: proc "contextless" (FrequencyRatio: f32) -> f32 {…}

Initialize :: proc "c" (SpeakerChannelMask: SPEAKER_FLAGS, SpeedOfSound: f32, Instance: HANDLE) -> sys_windows.HRESULT ---

RadiansToCutoffFrequency :: proc "contextless" (Radians: f32, SampleRate: f32) -> f32 {…}

ReverbConvertI3DL2ToNative :: proc "contextless" (pI3DL2: ^REVERB_I3DL2_PARAMETERS, pNative: ^REVERB_PARAMETERS, sevenDotOneReverb: b32 = true) {…}

SemitonesToFrequencyRatio :: proc "contextless" (Semitones: f32) -> f32 {…}