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Commit f3ef7fc9 authored by Mikhail Naganov's avatar Mikhail Naganov
Browse files

audio: Update README.md to add info about the AIDL version 

Commit hashes mismatch is intentional, it seems that the previous
upstreaming left some of the downstream changes out.

Bug: 205884982
Test: N/A
Change-Id: Ia1a7879ae538a4e90aee62f9050b9d22ffa64fe7
Merged-In: Ia627e3845a078e6a4c545b13a723a6c5a038c53b
parent 5a412d3e

audio/README.md

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Directory structure of the audio HAL related code.



Run `common/all-versions/copyHAL.sh` to create a new version of the audio HAL

based on an existing one.

## Directory Structure for AIDL audio HAL



## Directory Structure

The AIDL version is located inside `aidl` directory. The tree below explains

the role of each subdirectory:



* `aidl_api` — snapshots of the API created each Android release. Every

  release, the current version of the API becomes "frozen" and gets assigned

  the next version number. If the API needs further modifications, they are

  made on the "current" version. After making modifications, run

  `m <package name>-update-api` to update the snapshot of the "current"

  version.

* `android/hardware/audio/common` — data structures and interfaces shared

  between various HALs: BT HAL, core and effects audio HALs.

* `android/hardware/audio/core` — data structures and interfaces of the

  core audio HAL.

* `default` — the default, reference implementation of the audio HAL service.

* `vts` — VTS tests for the AIDL HAL.



## Directory Structure for HIDL audio HAL



Run `common/all-versions/copyHAL.sh` to create a new version of the HIDL audio

HAL based on an existing one. Note that this isn't possible since Android T

release. Android U and above uses AIDL audio HAL.



* `2.0` — version 2.0 of the core HIDL API. Note that `.hal` files

  can not be moved into the `core` directory because that would change