Audiokinetic

Wwise SDK 2022.1.19

 /*******************************************************************************
 The content of this file includes portions of the AUDIOKINETIC Wwise Technology
 released in source code form as part of the SDK installer package.
  
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 Alternatively, this file may be used under the Apache License, Version 2.0 (the 
 "Apache License"); you may not use this file except in compliance with the 
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 http://www.apache.org/licenses/LICENSE-2.0.
  
 Unless required by applicable law or agreed to in writing, software distributed
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 /// \file 
 /// Software source plug-in and effect plug-in interfaces.
  
 #ifndef _IAK_MIXER_PLUGIN_H_
 #define _IAK_MIXER_PLUGIN_H_
  
 #include <AK/SoundEngine/Common/IAkPlugin.h>
  
 namespace AK
 {
     /// Software effect plug-in interface for panner/mixer effects (see \ref soundengine_plugins_effects).
     class IAkMixerEffectPlugin : public IAkPlugin
     {
     public:
  
         /// Software effect plug-in initialization. Prepares the effect for data processing, allocates memory and sets up the initial conditions. 
         /// \aknote Memory allocation should be done through appropriate macros (see \ref fx_memory_alloc). \endaknote
         virtual AKRESULT Init( 
             IAkPluginMemAlloc *         in_pAllocator,              ///< Interface to memory allocator to be used by the effect.
             IAkMixerPluginContext *     in_pMixerPluginContext,     ///< Interface to mixer plug-in's context.
             IAkPluginParam *            in_pParams,                 ///< Interface to plug-in parameters.
             AkAudioFormat &             in_rFormat                  ///< Audio data format of the requested output signal.
             ) = 0;
  
         /// This function is called whenever a new input is connected to the underlying mixing bus.
         virtual void OnInputConnected( 
             IAkMixerInputContext * in_pInput            ///< Input that is being connected.
             ) = 0;
         
         /// This function is called whenever a new input is disconnected to the underlying mixing bus.
         /// \aknote OnInputDisconnected() may be called between calls to ConsumeInput() and OnMixDone().\endaknote
         virtual void OnInputDisconnected( 
             IAkMixerInputContext * in_pInput            ///< Input that is being disconnected.
             ) = 0;
  
         /// This function is called whenever an input (voice or bus) needs to be mixed.
         /// During an audio frame, ConsumeInput() will be called for each input that need to be mixed.
         /// \aknote io_pInputBuffer->eState will be set as AK_NoMoreData the last time the given input is processed by ConsumeInput(). Otherwise it is set to AK_DataReady.
         /// Mixers cannot make an input remain alive by changing their state.\endaknote
         /// \aknote ConsumeInput() will not be called for frames during which a voice is not audible.\endaknote
         /// \sa
         /// - OnMixDone
         /// - OnEffectsProcessed
         virtual void ConsumeInput( 
             IAkMixerInputContext *  in_pInputContext,   ///< Context for this input. Carries non-audio data.
             AkRamp                  in_baseVolume,      ///< Base volume to apply to this input (prev corresponds to the beginning, next corresponds to the end of the buffer). This gain is agnostic of emitter-listener pair-specific contributions (such as distance level attenuation).
             AkRamp                  in_emitListVolume,  ///< Emitter-listener pair-specific gain. When there are multiple emitter-listener pairs, this volume equals 1, and pair gains are applied directly on the channel volume matrix (accessible via IAkMixerInputContext::GetSpatializedVolumes()). For custom processing of emitter-listener pairs, one should query each pair volume using IAkMixerInputContext::Get3DPosition(), then AkEmitterListenerPair::GetGainForConnectionType().
             AkAudioBuffer *         io_pInputBuffer,    ///< Input audio buffer data structure. Plugins should avoid processing data in-place.
             AkAudioBuffer *         io_pMixBuffer       ///< Output audio buffer data structure. Stored until call to OnEffectsProcessed().
             ) = 0;
  
         /// This function is called once every audio frame, when all inputs have been mixed in 
         /// with ConsumeInput(). It is the time when the plugin may perform final DSP/bookkeeping.
         /// After the bus buffer io_pMixBuffer has been pushed to the bus downstream (or the output device),
         /// it is cleared out for the next frame.
         /// \aknote io_pMixBuffer->eState is passed as AK_DataReady for the whole existence of the bus, until the last frame where it will be set to AK_NoMoreData.
         /// However, mixer plugins are capable of forcing the bus to remain alive for a longer time by changing io_pMixBuffer->eState back to AK_DataReady.
         /// You may do this in OnMixDone() or in OnEffectsProcessed(). The difference is that effects inserted on the bus will enter their "tail mode" if you
         /// wait until OnEffectsProcessed() to flip the state to AK_DataReady. This is usually undesirable, so handling this inside OnMixDone() is usually preferred.\endaknote
         /// \sa
         /// - ConsumeInput
         /// - OnEffectsProcessed
         virtual void OnMixDone( 
             AkAudioBuffer *         io_pMixBuffer       ///< Output audio buffer data structure. Stored across calls to ConsumeInput().
             ) = 0;
  
         /// This function is called once every audio frame, after all insert effects on the bus have been processed, 
         /// which occur after the post mix pass of OnMixDone().
         /// After the bus buffer io_pMixBuffer has been pushed to the bus downstream (or the output device),
         /// it is cleared out for the next frame.
         /// \aknote io_pMixBuffer->eState is passed as AK_DataReady for the whole existence of the bus, until the last frame where it will be set to AK_NoMoreData.
         /// However, mixer plugins are capable of forcing the bus to remain alive for a longer time by changing io_pMixBuffer->eState back to AK_DataReady.
         /// You may do this in OnMixDone(), in OnEffectsProcessed() or in OnFrameEnd(). The difference is that effects inserted on the bus will enter their "tail mode" if you
         /// wait until OnEffectsProcessed() or OnFrameEnd() to flip the state to AK_DataReady. This is usually undesirable, so handling this inside OnMixDone() is usually preferred.\endaknote
         /// \sa
         /// - OnMixDone
         /// - AK::AkMetering
         /// - AK::IAkMixerPluginContext::EnableMetering()
         virtual void OnEffectsProcessed( 
             AkAudioBuffer *         io_pMixBuffer       ///< Output audio buffer data structure.
             ) = 0;
  
         /// This function is called once every audio frame, after all insert effects on the bus have been processed, and after metering has been processed (if applicable),
         /// which occur after OnEffectsProcessed().
         /// After the bus buffer io_pMixBuffer has been pushed to the bus downstream (or the output device), it is cleared out for the next frame.
         /// Mixer plugins may use this hook for processing the signal after it has been metered.
         /// \aknote io_pMixBuffer->eState is passed as AK_DataReady for the whole existence of the bus, until the last frame where it will be set to AK_NoMoreData.
         /// However, mixer plugins are capable of forcing the bus to remain alive for a longer time by changing io_pMixBuffer->eState back to AK_DataReady.
         /// You may do this in OnMixDone(), in OnEffectsProcessed() or in OnFrameEnd(). The difference is that effects inserted on the bus will enter their "tail mode" if you
         /// wait until OnEffectsProcessed() or OnFrameEnd() to flip the state to AK_DataReady. This is usually undesirable, so handling this inside OnMixDone() is usually preferred.\endaknote
         /// \aknote This function is called after metering gets computed on io_pMixBuffer. You may access the result in in_pMetering. Metering has to be enabled with AK::IAkMixerPluginContext::EnableMetering().
         /// It may also be enabled by the Wwise authoring tool when connected.\endaknote
         /// \sa
         /// - OnMixDone
         /// - AK::AkMetering
         /// - AK::IAkMixerPluginContext::EnableMetering()
         virtual void OnFrameEnd(
             AkAudioBuffer *         io_pMixBuffer,      ///< Output audio buffer data structure.
             AkMetering *            in_pMetering        ///< Struct containing metering data computed on io_pMixBuffer. May be NULL if metering is not enabled.
             ) = 0;
     };
 }
 #endif // _IAK_MIXER_PLUGIN_H_

AK::IAkMixerPluginContext

Interface to retrieve contextual information for a mixer.

Definition: IAkPlugin.h:442

Audiokinetic namespace.

Definition: AkWwiseSDKVersion.cs:31

AK::IAkPluginParam

Definition: IAkPlugin.h:619

AK::IAkMixerEffectPlugin::ConsumeInput

virtual void ConsumeInput(IAkMixerInputContext *in_pInputContext, AkRamp in_baseVolume, AkRamp in_emitListVolume, AkAudioBuffer *io_pInputBuffer, AkAudioBuffer *io_pMixBuffer)=0

AKRESULT

Standard function call result.

Definition: AkTypes.h:199

AK::IAkMixerInputContext

Definition: IAkPlugin.h:914

AK::IAkMixerEffectPlugin

Software effect plug-in interface for panner/mixer effects (see Creating Sound Engine Effect Plug-ins...

Definition: IAkMixerPlugin.h:39

AK::IAkMixerEffectPlugin::OnEffectsProcessed

virtual void OnEffectsProcessed(AkAudioBuffer *io_pMixBuffer)=0

AK::IAkMixerEffectPlugin::OnFrameEnd

virtual void OnFrameEnd(AkAudioBuffer *io_pMixBuffer, AkMetering *in_pMetering)=0

AK::IAkPluginMemAlloc

Definition: IAkPluginMemAlloc.h:43

AK::IAkMixerEffectPlugin::OnMixDone

virtual void OnMixDone(AkAudioBuffer *io_pMixBuffer)=0

AkRamp

Volume ramp specified by end points "previous" and "next".

Definition: AkTypes.h:944

AK::IAkMixerEffectPlugin::Init

virtual AKRESULT Init(IAkPluginMemAlloc *in_pAllocator, IAkMixerPluginContext *in_pMixerPluginContext, IAkPluginParam *in_pParams, AkAudioFormat &in_rFormat)=0

AK::AkMetering

Struct containing metering information about a buffer. Depending on when this struct is generated,...

Definition: AkCommonDefs.h:203

AkAudioBuffer

Definition: AkCommonDefs.h:454

AK::IAkMixerEffectPlugin::OnInputConnected

virtual void OnInputConnected(IAkMixerInputContext *in_pInput)=0

This function is called whenever a new input is connected to the underlying mixing bus.

AkAudioFormat

Defines the parameters of an audio buffer format.

Definition: AkCommonDefs.h:62

AK::IAkMixerEffectPlugin::OnInputDisconnected

virtual void OnInputDisconnected(IAkMixerInputContext *in_pInput)=0

IAkPlugin.h

AK::IAkPlugin

Definition: IAkPlugin.h:690

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