기타 문서

Wwise SDK 2018.1.11
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 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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   Version: <VERSION>  Build: <BUILDNUMBER>

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 // AkAndroidSoundEngine.h

 /// \file 

 /// Main Sound Engine interface, specific Android.

 #pragma once

 #include <AK/SoundEngine/Common/AkTypes.h>

 #include <AK/Tools/Common/AkPlatformFuncs.h>

 #include <SLES/OpenSLES.h>

 #include "SLES/OpenSLES_Android.h"

 #include <jni.h>

 /// Platform specific initialization settings

 /// \sa AK::SoundEngine::Init

 /// \sa AK::SoundEngine::GetDefaultPlatformInitSettings

 /// - \ref soundengine_initialization_advanced_soundengine_using_memory_threshold

 struct AkPlatformInitSettings

 {

     // Threading model.

     AkThreadProperties  threadLEngine;          ///< Lower engine threading properties

     AkThreadProperties  threadOutputMgr;        ///< Ouput thread threading properties

     AkThreadProperties  threadBankManager;      ///< Bank manager threading properties (its default priority is AK_THREAD_PRIORITY_NORMAL)

     AkThreadProperties  threadMonitor;          ///< Monitor threading properties (its default priority is AK_THREAD_PRIORITY_ABOVENORMAL). This parameter is not used in Release build.    

     // Memory.

     AkReal32            fLEngineDefaultPoolRatioThreshold;  ///< 0.0f to 1.0f value: The percentage of occupied memory where the sound engine should enter in Low memory mode. \ref soundengine_initialization_advanced_soundengine_using_memory_threshold

     AkUInt32            uLEngineDefaultPoolSize;///< Lower Engine default memory pool size

     AkUInt32            uSampleRate;            ///< Sampling Rate.  Set to 0 to get the native sample rate.  Default value is 0.

     AkUInt16            uNumRefillsInVoice;     ///< Number of refill buffers in voice buffer.  Defaults to 4.

     AkChannelMask       uChannelMask;           ///< use AK_SPEAKER_SETUP_STEREO

     bool                bRoundFrameSizeToHWSize;///< Used when hardware-preferred frame size and user-preferred frame size (AkInitSettings.uNumSamplesPerFrame) are not compatible.  

                                                 /// If true (default) the sound engine will initialize to a multiple of the HW setting, close to the user setting.

                                                 /// If false, the user setting is used as is, regardless of the HW preference (might incur a performance hit).

     SLObjectItf         pSLEngine;              ///< OpenSL engine reference for sharing between various audio components.

     JavaVM*             pJavaVM;                ///< Active JavaVM for the app, used for internal system calls.  Usually provided through the android_app structure given at startup or the NativeActivity. This parameter needs to be set to allow the sound engine initialization.

     jobject             jNativeActivity;        ///< NativeActivity instance for this application. Usually provided through the android_app structure, or through other means if your application has an overridden activity.

                                                 ///< This is optional.  However, not providing this object will prevent the background music muting when player start his own music in an external player.

 };

 struct AkInitSettings;

 namespace AK

 {

     namespace SoundEngine

     {

         /// Get instance of OpenSL created by the sound engine at initialization.

         /// \return NULL if sound engine is not initialized

         AK_EXTERNAPIFUNC( SLObjectItf, GetWwiseOpenSLInterface )();

         /// Gets specific settings for the fast audio path on Android.  Call this function after AK::SoundEngine::GetDefaultSettings and AK::SoundEngine::GetPlatformDefaultSettings to modify settings for the fast path.

         /// in_pfSettings.pJavaVM and in_pfSettings.jNativeActivity must be filled properly prior to calling GetFastPathSettings.

         /// The fast path constraints are:

         /// -The sample rate must match the hardware native sample rate 

         /// -The number of samples per frame must be a multiple of the hardware buffer size.

         /// Not fulfilling these constraints makes the audio hardware less efficient.

         /// In general, using the fast path means a higher CPU usage.  Complex audio designs may not be feasible while using the fast path.

         AKRESULT GetFastPathSettings(AkInitSettings &in_settings, AkPlatformInitSettings &in_pfSettings);

     };

 };