_ak_android_sound_engine_8h

目标平台:

Wwise SDK 2022.1.18

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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);
     };
 };