自 2025 年 3 月 27 日起,我们建议您使用 android-latest-release
而非 aosp-main
构建 AOSP 并为其做出贡献。如需了解详情,请参阅 AOSP 的变更。
AIDL 音频 HAL
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
从 Android 14 开始,使用稳定的 AIDL 定义音频 HAL 接口。建议合作伙伴和 SoC 供应商重新实现其音频 HAL 以提供 AIDL 接口。
扩展 libaudiohal
库可以增加对 AIDL HAL 的框架支持。使用 AIDL 实现时,音频政策配置规范会移至 AIDL HAL。进行此更改后,音频政策管理中心 (APM) 会从 HAL 获取配置,而不是从供应商提供的 XML 文件中使用配置。
音频 AIDL HAL API
本部分将介绍适用于 AIDL 的核心 HAL、音效和通用 HAL API。
在实现与内核驱动程序进行交互的新版音频 HAL 时,请参考 /hardware/interfaces/audio/aidl/default/
中的 AIDL API 的默认实现。
如需了解 AIDL 的音频 HAL 目录结构,请参阅音频 HAL 自述文件。
Core HAL
部分使用 AIDL 的 Core HAL 关键接口如下所示:
Effects HAL
使用 AIDL 的 Effects HAL 的一些关键接口如下所示:
如需了解详情,请参阅音效。
Common HAL
各种 HAL(如 BT HAL、核心 HAL 和音效 HAL)共用的数据结构和接口位于通用 HAL 中。
常见的稳定版数据类型
HAL 和框架都使用稳定的数据结构定义。
测试 Audio AIDL HAL API
我们为 AIDL 接口提供了新的 VTS 测试。
新版 HAL 没有任何变化可能会影响安全性。
本页面上的内容和代码示例受内容许可部分所述许可的限制。Java 和 OpenJDK 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-03-05。
[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["没有我需要的信息","missingTheInformationINeed","thumb-down"],["太复杂/步骤太多","tooComplicatedTooManySteps","thumb-down"],["内容需要更新","outOfDate","thumb-down"],["翻译问题","translationIssue","thumb-down"],["示例/代码问题","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC):2025-03-05。"],[],[],null,["# AIDL Audio HAL\n\nStarting with Android 14, the Audio HAL interface is\ndefined using [Stable AIDL](/docs/core/architecture/aidl/stable-aidl). Partners\nand SoC vendors are encouraged to reimplement their Audio HAL to provide an\nAIDL interface.\n\nExtending the `libaudiohal` library adds framework support for AIDL HAL.\nWith the AIDL implementation, the audio policy configuration specification is\nmoved to AIDL HAL. With this change, the Audio Policy Manager (APM) gets the\nconfiguration from the HAL instead of consuming it from the vendor-provided XML\nfile.\n\nAudio AIDL HAL API\n------------------\n\nThis section describes the Core, Effects, and Common HAL APIs for AIDL.\n\nUse default implementation of the AIDL API at\n[`/hardware/interfaces/audio/aidl/default/`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/default/)\nas a reference when implementing new versions of Audio HALs that\ninteract with kernel drivers.\n\nSee the\n[Audio HAL README file](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/README.md)\nfor the Audio HAL directory structure for AIDL.\n\n### Core HAL\n\nSome of the [key interfaces of Core HAL](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/core/),\nusing AIDL, are as follows:\n\n- [`IModule.aidl`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/core/IModule.aidl) is the entry point into the API.\n- Streams are unidirectional and are used by AudioFlinger to send or receive audio to and from the HAL through [`IStreamOut.aidl`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/core/IStreamOut.aidl) and [`IStreamIn.aidl`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/core/IStreamIn.aidl).\n- [`ITelephony.aidl`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/core/ITelephony.aidl) provides controls specific to telephony functions.\n- [`IBluetooth.aidl`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/core/IBluetooth.aidl) provides BT SCO and HFP controls that were on `IPrimaryModule` in the HIDL API.\n- [`IConfig.aidl`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/core/IConfig.aidl) provides system-wide configuration parameters.\n- [`ISoundDose.aidl`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/core/sounddose/ISoundDose.aidl) provides sound dose support. See [Sound dose](/docs/core/audio/sound-dose) for more information.\n- The latest version of the Core HAL API *in development* is in [`/hardware/interfaces/audio/aidl/android/hardware/audio/core/`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/core/).\n- The latest *released* version of the Core HAL API is in [`/hardware/interfaces/audio/aidl/aidl_api/android.hardware.audio.core/`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/aidl_api/android.hardware.audio.core/).\n\n### Effects HAL\n\nSome of the key interfaces of Effects HAL, using AIDL, are as follows:\n\n- [`IFactory.aidl`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/effect/IFactory.aidl) is the entry point into the API.\n- [`Descriptor.aidl`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/effect/Descriptor.aidl) contains all information such as capabilities and attributes for an effect implementation.\n- [`Capability.aidl`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/effect/Capability.aidl) defines effect capabilities that don't change at runtime.\n- [`Parameter.aidl`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/effect/Parameter.aidl) defines all parameters supported by the effect instance.\n- [`IEffect.aidl`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/effect/IEffect.aidl) is used to configure and control particular effect instances.\n- Effect-specific parcelables named after the effect.\n\n- The latest version of the Effects HAL API *in development* is in [`/hardware/interfaces/audio/aidl/android/hardware/audio/effect/`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/effect/).\n\n- The latest *released* version of the Effects HAL API is in\n [`/hardware/interfaces/audio/aidl/aidl_api/android.hardware.audio.effect`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/aidl_api/android.hardware.audio.effect/).\n\nSee the [Audio Effects](/docs/core/audio/audio-effects) for more\ninformation.\n\n### Common HAL\n\nData structures and interfaces shared between various HALs such as BT HAL, core\nand effects Audio HALs are in the Common HAL.\n\n- The latest version of the Common AIDL HAL *in development* is in\n [`/hardware/interfaces/audio/aidl/android/hardware/audio/common/`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/android/hardware/audio/common/).\n\n- The latest *released* version of the Common HAL API is in\n [`/hardware/interfaces/audio/aidl/aidl_api/android.hardware.audio.common/current/android/hardware/audio/common/`](https://cs.android.com/android/platform/superproject/+/android-latest-release:hardware/interfaces/audio/aidl/aidl_api/android.hardware.audio.common/).\n\n#### Common stable data types\n\nStable data structure definitions are used both by HALs and the framework.\n\n- The latest version of the stable data types *in development* is in\n [`/system/hardware/interfaces/media/aidl/android/media/audio/common/`](https://cs.android.com/android/platform/superproject/+/android-latest-release:system/hardware/interfaces/media/aidl/android/media/audio/common/).\n\n- The latest *released* version of the stable data types is in\n [`/system/hardware/interfaces/media/aidl_api/android.media.audio.common.types/`](https://cs.android.com/android/platform/superproject/+/android-latest-release:system/hardware/interfaces/media/aidl_api/android.media.audio.common.types/).\n\nTesting the Audio AIDL HAL API\n------------------------------\n\nNew [VTS](https://android.googlesource.com/platform/hardware/interfaces/+/refs/heads/android16-release/audio/aidl/vts/)\ntests are provided for the AIDL interface.\n\nThere are no changes in the new HAL version that can affect security."]]