_ak_android_sound_engine_8h

目标平台:

Wwise SDK 2019.1.11

 /*******************************************************************************

 The content of this file includes portions of the AUDIOKINETIC Wwise Technology

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

 Commercial License Usage

 Licensees holding valid commercial licenses to the AUDIOKINETIC Wwise Technology

 may use this file in accordance with the end user license agreement provided 

 with the software or, alternatively, in accordance with the terms contained in a

 written agreement between you and Audiokinetic Inc.

 Apache License Usage

 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 

 Apache License. You may obtain a copy of the Apache License at 

 http://www.apache.org/licenses/LICENSE-2.0.

 Unless required by applicable law or agreed to in writing, software distributed

 under the Apache License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES

 OR CONDITIONS OF ANY KIND, either express or implied. See the Apache License for

 the specific language governing permissions and limitations under the License.

   Version: <VERSION>  Build: <BUILDNUMBER>

   Copyright (c) <COPYRIGHTYEAR> Audiokinetic Inc.

 *******************************************************************************/

 // 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>

 ///< API used for audio output

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

 ///< Use AkAPI_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

 /// - \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

     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.

     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.

 };

 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);

     };

 };