mirror of
https://github.com/Evolution-X/hardware_interfaces
synced 2026-02-01 16:50:18 +00:00
214c86e522
Compare the mixer control values set by the user with the values retrieved from the hardware, and log a warning if they do not match. This check is meaningful because of the integer division involved in converting between percentage and hardware values in tinyalsa, which can lead to small discrepancies due to rounding. Bug: 375030900 Test: build locally Change-Id: If396a5cedc768f2bab5db055b5cf875143e3c23b Signed-off-by: Jindong Yue <jindong.yue@nxp.com>
Audio HAL
Directory structure of the audio HAL related code.
Directory Structure for AIDL audio HAL
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, runm <package name>-update-apito 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.halfiles can not be moved into thecoredirectory 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 inaudio/N.M).7.0— code specific to version V7.0 of the core HIDL APIall-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 (fromhardware/libhardware).util— utilities for the default implementation.
vtsVTS tests for the core HIDL API.
effect— same for the effect HIDL API.2.0config— the XSD schema for the Audio Effects configuration file.
4.0- ...
all-versionsdefault— code that wraps the legacy API (fromhardware/libhardware).util— utilities for the default implementation.
vtsVTS 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.