_ak_android_sound_engine_8h

目标平台:

Wwise SDK 2021.1.14

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 released in source code form as part of the SDK installer package.

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   Version: v2021.1.14  Build: 6590

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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>

 /// \cond !(Web)

 ///< API used for audio output

 ///< Use with AkPlatformInitSettings to select the API used for audio output.  

 ///< Use AkAudioAPI_Default, it will select the more appropriate API depending on the computer's capabilities.  Other values should be used for testing purposes.

 ///< \sa AK::SoundEngine::Init

 typedef enum AkAudioAPIAndroid

 {

     AkAudioAPI_AAudio    = 1 << 0,                                 ///< Use AAudio (lower latency, available only for Android 8.1 or above) 

     AkAudioAPI_OpenSL_ES = 1 << 1,                                 ///< Use OpenSL ES (older API, compatible with all Android devices)

     AkAudioAPI_Default = AkAudioAPI_AAudio | AkAudioAPI_OpenSL_ES, ///< Default value, will select the more appropriate API (AAudio for compatible devices, OpenSL for others)  

 } AkAudioAPI;

 /// Platform specific initialization settings

 /// \sa AK::SoundEngine::Init

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

 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.    

     AkAudioAPI          eAudioAPI;  ///< Main audio API to use. Leave to AkAPI_Default for the default sink (default value).

                                     ///< \ref AkAudioAPI

     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.  

     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             jActivity;              ///< android.app.Activity instance for this application. Usually provided through the android_app structure, or through other means if your application has an overridden activity.

     bool                bVerboseSink;           ///< Enable this to inspect sink behavior. Useful for debugging non-standard Android devices.

     bool                bEnableLowLatency;      ///< Used the lowest output latency possible for the current hardware.

                                                 /// If true (default), the output audio device will be initialized in low-latency operation, allowing for more responsive audio playback on most devices. However, when operating in low-latency mode, some devices may have differences in audio reproduction.

                                                 /// If false, the output audio device will be initialized without low-latency operation.

 };

 /// \endcond

 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);

     };

 };