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Wwise SDK 2025.1.0
AkAndroidSoundEngine.h
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1 /*******************************************************************************
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3 released in source code form as part of the SDK installer package.
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5 Commercial License Usage
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12 Apache License Usage
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14 Alternatively, this file may be used under the Apache License, Version 2.0 (the
15 "Apache License"); you may not use this file except in compliance with the
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22 the specific language governing permissions and limitations under the License.
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24  Copyright (c) 2025 Audiokinetic Inc.
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26 
27 // AkAndroidSoundEngine.h
28 
29 /// \file
30 /// Main Sound Engine interface, specific Android.
31 
32 #pragma once
33 
34 #include <AK/SoundEngine/Common/AkTypes.h>
35 #include <AK/Tools/Common/AkPlatformFuncs.h>
36 #include <SLES/OpenSLES.h>
37 #include "SLES/OpenSLES_Android.h"
38 #include <jni.h>
39 
40 ///< API used for audio output
41 ///< Use with AkPlatformInitSettings to select the API used for audio output.
42 ///< Use AkAPI_Default, it will select the more appropriate API depending on the computer's capabilities. Other values should be used for testing purposes.
43 ///< \sa AK::SoundEngine::Init
44 typedef enum AkAudioAPIAndroid
45 {
46  AkAudioAPI_AAudio = 1 << 0, ///< Use AAudio (lower latency, available only for Android 8.1 or above)
47  AkAudioAPI_OpenSL_ES = 1 << 1, ///< Use OpenSL ES (older API, compatible with all Android devices)
48  AkAudioAPI_DolbyAtmos = 1 << 8, ///< Add this bit to opt into the Dolby Atmos API for 3D audio where available.
49  AkAudioAPI_AndroidSpatializer = 1 << 9, ///< Add this bit to opt into the Android Spatializer API for 3D audio where available. Note that this may have a noticeable negative impact on audio output latency.
50 
51  AkAudioAPI_Default = AkAudioAPI_AAudio | AkAudioAPI_OpenSL_ES | AkAudioAPI_DolbyAtmos, ///< Default value, will select the more appropriate API (Dolby Atmos for supported devices, AAudio for most devices, OpenSL for older devices)
52 } AkAudioAPI;
53 
54 enum AkAudioPath
55 {
56  // Use the legacy path for audio output. This path has the highest latency but best compatibility with the widest range of devices.
57  AkAudioPath_Legacy,
58 
59  // Attempt to use a low-latency path to the system audio mixer. This gives improved latency and good compatibility.
60  // Devices that don't support a low-latency path automatically fall back to the Legacy path.
61  // This is the default path.
62  AkAudioPath_LowLatency,
63 
64  // Attempt to open an exclusive audio stream to the audio driver, bypassing the system audio mixer for best latency.
65  // When available, this mode gives the best latency. However, it has several drawbacks to be aware of:
66  // - App audio will not be mixed with other apps. Other apps will be prevented from using exclusive mode while this output stream is active.
67  // - Screen recordings may not contain any audio.
68  // - When the app is put in the background, there is a possibility that another app 'steals' this path. When the Wwise app comes back to the foreground, this mode can become unavailable.
69  // - Audio will bypass system-level DSP effects like volume normalization and spatialization. 3D Audio will not work, and output volume may be abnormally loud or quiet.
70  // - Other functionality such as audio recording may be disabled when using this path.
71  //
72  // Not all devices support exclusive mode. Devices that don't support exclusive mode can fallback to either LowLatency or Legacy depending on device capabilities.
73  AkAudioPath_Exclusive,
74 
75  // The default audio path.
76  AkAudioPath_Default = AkAudioPath_LowLatency,
77 };
78 
79 /// Platform specific initialization settings
80 /// \sa AK::SoundEngine::Init
81 /// \sa AK::SoundEngine::GetDefaultPlatformInitSettings
82 struct AkPlatformInitSettings
83 {
84  // Threading model.
85  AkThreadProperties threadLEngine; ///< Lower engine threading properties
86  AkThreadProperties threadOutputMgr; ///< Ouput thread threading properties
87  AkThreadProperties threadBankManager; ///< Bank manager threading properties (its default priority is AK_THREAD_PRIORITY_NORMAL)
88  AkThreadProperties threadMonitor; ///< Monitor threading properties (its default priority is AK_THREAD_PRIORITY_ABOVENORMAL). This parameter is not used in Release build.
89 
90  AkAudioAPI eAudioAPI; ///< Main audio API to use. Leave to AkAPI_Default for the default sink (default value). \ref AkAudioAPI
91  AkAudioPath eAudioPath; ///< Which audio path to use. See enum for details. Default: AkAudioPath_LowLatency
92 
93  AkUInt32 uSampleRate; ///< Sampling Rate. Set to 0 to get the native sample rate. Default value is 0.
94  AkUInt16 uNumRefillsInVoice; ///< Number of refill buffers in voice buffer. Defaults to 4.
95 
96  SLObjectItf pSLEngine; ///< OpenSL engine reference for sharing between various audio components.
97  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.
98  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.
99 
100  bool bVerboseSink; ///< Enable this to inspect sink behavior. Useful for debugging non-standard Android devices.
101 };
102 
103 struct AkInitSettings;
104 
105 namespace AK
106 {
107  namespace SoundEngine
108  {
109  /// Get instance of OpenSL created by the sound engine at initialization.
110  /// \return NULL if sound engine is not initialized
111  AK_EXTERNAPIFUNC( SLObjectItf, GetWwiseOpenSLInterface )();
112 
113  /// 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.
114  /// in_pfSettings.pJavaVM and in_pfSettings.jNativeActivity must be filled properly prior to calling GetFastPathSettings.
115  /// The fast path constraints are:
116  /// -The sample rate must match the hardware native sample rate
117  /// -The number of samples per frame must be a multiple of the hardware buffer size.
118  /// Not fulfilling these constraints makes the audio hardware less efficient.
119  /// In general, using the fast path means a higher CPU usage. Complex audio designs may not be feasible while using the fast path.
120  AKRESULT GetFastPathSettings(AkInitSettings &in_settings, AkPlatformInitSettings &in_pfSettings);
121  };
122 };
AkAudioPath_Legacy
@ AkAudioPath_Legacy
Definition: AkAndroidSoundEngine.h:57
AkUInt16
uint16_t AkUInt16
Unsigned 16-bit integer
Definition: AkNumeralTypes.h:33
AK
Definition of data structures for AkAudioObject
Definition: AkWwiseSDKVersion.cs:31
AkAudioAPI_AAudio
@ AkAudioAPI_AAudio
Use AAudio (lower latency, available only for Android 8.1 or above)
Definition: AkAndroidSoundEngine.h:46
AkAudioPath_Exclusive
@ AkAudioPath_Exclusive
Definition: AkAndroidSoundEngine.h:73
AkAudioPath_Default
@ AkAudioPath_Default
Definition: AkAndroidSoundEngine.h:76
AK_EXTERNAPIFUNC
#define AK_EXTERNAPIFUNC(_type, _name)
Definition: AkSoundEngineExport.h:81
AK::SoundEngine::GetWwiseOpenSLInterface
AKSOUNDENGINE_API SLObjectItf GetWwiseOpenSLInterface()
AkAudioAPI_AndroidSpatializer
@ AkAudioAPI_AndroidSpatializer
Add this bit to opt into the Android Spatializer API for 3D audio where available....
Definition: AkAndroidSoundEngine.h:49
AkAudioPath_LowLatency
@ AkAudioPath_LowLatency
Definition: AkAndroidSoundEngine.h:62
AkPlatformInitSettings::threadMonitor
AkThreadProperties threadMonitor
Monitor threading properties (its default priority is AK_THREAD_PRIORITY_ABOVENORMAL)....
Definition: AkAndroidSoundEngine.h:88
AkPlatformInitSettings::threadLEngine
AkThreadProperties threadLEngine
Lower engine threading properties
Definition: AkAndroidSoundEngine.h:85
AkAudioAPI_Default
@ AkAudioAPI_Default
Default value, will select the more appropriate API (Dolby Atmos for supported devices,...
Definition: AkAndroidSoundEngine.h:51
AkPlatformInitSettings::bVerboseSink
bool bVerboseSink
Enable this to inspect sink behavior. Useful for debugging non-standard Android devices.
Definition: AkAndroidSoundEngine.h:100
AkPlatformInitSettings::uNumRefillsInVoice
AkUInt16 uNumRefillsInVoice
Number of refill buffers in voice buffer. Defaults to 4.
Definition: AkAndroidSoundEngine.h:94
AkAudioAPI_DolbyAtmos
@ AkAudioAPI_DolbyAtmos
Add this bit to opt into the Dolby Atmos API for 3D audio where available.
Definition: AkAndroidSoundEngine.h:48
AkPlatformInitSettings::threadOutputMgr
AkThreadProperties threadOutputMgr
Ouput thread threading properties
Definition: AkAndroidSoundEngine.h:86
AkPlatformInitSettings::eAudioPath
AkAudioPath eAudioPath
Which audio path to use. See enum for details. Default: AkAudioPath_LowLatency
Definition: AkAndroidSoundEngine.h:91
AkPlatformInitSettings::jActivity
jobject jActivity
android.app.Activity instance for this application. Usually provided through the android_app structur...
Definition: AkAndroidSoundEngine.h:98
AkPlatformInitSettings::pSLEngine
SLObjectItf pSLEngine
OpenSL engine reference for sharing between various audio components.
Definition: AkAndroidSoundEngine.h:96
AKRESULT
AKRESULT
Definition: AkEnums.h:32
AkUInt32
uint32_t AkUInt32
Unsigned 32-bit integer
Definition: AkNumeralTypes.h:35
AkPlatformInitSettings::eAudioAPI
AkAudioAPI eAudioAPI
Main audio API to use. Leave to AkAPI_Default for the default sink (default value)....
Definition: AkAndroidSoundEngine.h:90
AkPlatformInitSettings::uSampleRate
AkUInt32 uSampleRate
Sampling Rate. Set to 0 to get the native sample rate. Default value is 0.
Definition: AkAndroidSoundEngine.h:93
AK::SoundEngine::GetFastPathSettings
AKRESULT GetFastPathSettings(AkInitSettings &in_settings, AkPlatformInitSettings &in_pfSettings)
AkPlatformInitSettings::threadBankManager
AkThreadProperties threadBankManager
Bank manager threading properties (its default priority is AK_THREAD_PRIORITY_NORMAL)
Definition: AkAndroidSoundEngine.h:87
AkPlatformInitSettings::pJavaVM
JavaVM * pJavaVM
Active JavaVM for the app, used for internal system calls. Usually provided through the android_app s...
Definition: AkAndroidSoundEngine.h:97
AkAudioAPI_OpenSL_ES
@ AkAudioAPI_OpenSL_ES
Use OpenSL ES (older API, compatible with all Android devices)
Definition: AkAndroidSoundEngine.h:47

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