A partire dal 27 marzo 2025, ti consigliamo di utilizzare android-latest-release anziché aosp-main per compilare e contribuire ad AOSP. Per ulteriori informazioni, vedi Modifiche ad AOSP.
HAL Audio AIDL
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A partire da Android 14, l'interfaccia HAL audio viene definita utilizzando Stable AIDL. I partner e i fornitori di SoC sono invitati a reimplementare l'HAL audio per fornire un'interfaccia AIDL.
L'estensione della libreria libaudiohal aggiunge il supporto del framework per l'HAL AIDL.
Con l'implementazione AIDL, la specifica di configurazione dei criteri audio viene trasferita all'HAL AIDL. Con questa modifica, Audio Policy Manager (APM) ottiene la configurazione dall'HAL anziché dal file XML fornito dal fornitore.
API HAL Audio AIDL
Questa sezione descrive le API HAL Core, Effetti e Comuni per AIDL.
Utilizza l'implementazione predefinita dell'API AIDL in
/hardware/interfaces/audio/aidl/default/
come riferimento per l'implementazione di nuove versioni di HAL audio che interagiscono con i driver del kernel.
Consulta il
file README di Audio HAL
per la struttura della directory Audio HAL per AIDL.
HAL di base
Di seguito sono riportate alcune delle interfacce principali di Core HAL che utilizzano AIDL:
HAL Effetti
Di seguito sono riportate alcune delle interfacce principali di Effects HAL, che utilizzano AIDL:
Per ulteriori informazioni, consulta la sezione Effetti audio.
HAL comune
Le strutture di dati e le interfacce condivise tra vari HAL, come BT HAL, HAL audio di base e di effetti, si trovano nell'HAL comune.
Tipi di dati stabili comuni
Le definizioni di strutture di dati stabili vengono utilizzate sia dagli HAL che dal framework.
Test dell'API HAL Audio AIDL
Sono disponibili nuovi test VTS per l'interfaccia AIDL.
La nuova versione HAL non presenta modifiche che possono influire sulla sicurezza.
I campioni di contenuti e codice in questa pagina sono soggetti alle licenze descritte nella Licenza per i contenuti. Java e OpenJDK sono marchi o marchi registrati di Oracle e/o delle sue società consociate.
Ultimo aggiornamento 2025-07-27 UTC.
[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Mancano le informazioni di cui ho bisogno","missingTheInformationINeed","thumb-down"],["Troppo complicato/troppi passaggi","tooComplicatedTooManySteps","thumb-down"],["Obsoleti","outOfDate","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Problema relativo a esempi/codice","samplesCodeIssue","thumb-down"],["Altra","otherDown","thumb-down"]],["Ultimo aggiornamento 2025-07-27 UTC."],[],[],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."]]
