History

Mikhail Naganov 43a85cfb2b audio: Add a helper class to simplify legacy HALs migration Since in the C and HIDL APIs the method for opening a stream receives the device to connect to, some legacy HAL implementations took an advantage of that. In AIDL APIs device port connection process is more dynamic and independent of the stream creation. To simplify porting of legacy implementations to AIDL, a helper class StreamSwitcher is added. It emulates the legacy behavior by allowing to postpone the stream implementation creation until the connected device is known. Until that moment, it exposes to the client a stub implementation of the stream interface. Bug: 264712385 Bug: 286914845 Test: atest VtsHalAudioCoreTargetTest Change-Id: Ie8ae0338fd22f705e00a34e56a7fa235eda5ed9e		2023-07-24 16:40:39 -07:00
..
2.0	[LSC] Add LOCAL_LICENSE_KINDS to hardware/interfaces	2021-02-23 14:26:20 -08:00
4.0	[LSC] Add LOCAL_LICENSE_KINDS to hardware/interfaces	2021-02-23 14:26:20 -08:00
5.0	[LSC] Add LOCAL_LICENSE_KINDS to hardware/interfaces	2021-02-23 14:26:20 -08:00
6.0	[LSC] Add LOCAL_LICENSE_KINDS to hardware/interfaces	2021-02-23 14:26:20 -08:00
7.0	audio: Fix parsing of arguments in the APM config update script am: `b9e244dfc7` am: `188d6412b0`	2021-06-11 22:06:36 +00:00
7.1	Make AUDIO_USAGE_NOTIFICATION_EVENT available to HALs	2022-02-12 00:03:49 +00:00
aidl	audio: Add a helper class to simplify legacy HALs migration	2023-07-24 16:40:39 -07:00
common	Remove duplcated static libgtest	2023-06-05 12:47:39 -07:00
core/all-versions	audio VTS: Update 7.0/PolicyConfig	2023-05-08 13:17:08 -07:00
effect	Effect: Move thread priority updates from threadLoop	2023-01-13 13:48:48 -08:00
policy/1.0	Set root elements for xsd_config modules	2023-05-22 16:43:12 +09:00
OWNERS	audio: clean up OWNERS	2022-12-29 23:22:02 +00:00
README.md	audio: Update README.md to add info about the AIDL version	2023-01-20 21:54:17 +00:00

README.md

Audio HAL

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

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 its namespace and include path.
- config — the XSD schema for the Audio Policy Manager configuration file.
4.0 — version 4.0 of the core HIDL API.
...
common — common types for audio core and effect HIDL API.
- 2.0 — version 2.0 of the common types HIDL API.
- 4.0 — version 4.0.
- ...
- 7.0 — version 7.0.
  - example — example implementation of the core and effect V7.0 API. It represents a "fake" audio HAL that doesn't actually communicate with hardware.
- all-versions — code common to all version of both core and effect API.
  - default — shared code of the default implementation.
    - service — vendor HAL service for hosting the default implementation.
  - test — utilities used by tests.
  - util — utilities used by both implementation and tests.
core — VTS tests and the default implementation of the core API (not HIDL API, it's in audio/N.M).
- 7.0 — code specific to version V7.0 of the core HIDL API
- all-versions — the code is common between all versions, version-specific parts are enclosed into conditional directives of preprocessor or reside in dedicated files.
  - default — code that wraps the legacy API (from hardware/libhardware).
    - util — utilities for the default implementation.
  - vts VTS tests for the core HIDL API.
effect — same for the effect HIDL API.
- 2.0
  - config — the XSD schema for the Audio Effects configuration file.
- 4.0
- ...
- all-versions
  - default — code that wraps the legacy API (from hardware/libhardware).
    - util — utilities for the default implementation.
  - vts VTS tests for the effect HIDL API.
policy — Configurable Audio Policy schemes.
- 1.0 — note that versions of CAP are not linked to the versions of audio HAL.
  - vts — VTS tests for validating actual configuration files.
  - xml — XSD schemas for CAP configuration files.