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https://github.com/Evolution-X/hardware_interfaces
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21d4b9608a
The legacy configuration was interesting because although the xml config file only listed 48000 Hz SR and AUDIO_CHANNEL_OUT_STEREO channel mask, the implementation allowed a range of SRs and MONO channel mask. The framework was liberally allowing requests for other SRs to go to the r_submix HAL, even without having them listed in the xml config file. However, since libaudiohal@aidl is more strict in matching configuration requests to port capabilities, we need to list all channels masks and SRs suported by the legacy HAL explicitly. However, we need to limit the amount of profiles to avoid extra load when passing them via AudioPolicyService.listAudioPorts, thus remove other PCM types. Also, to match the hard limit on the number of routes in the legacy implementation, set "maxOpen/ActiveStreamCount" for mix ports. Bug: 286914845 Bug: 300990644 Test: atest VtsHalAudioCoreTargetTest Test: atest android.media.audio.cts.AudioPlaybackCaptureTest Change-Id: I4a8c7d016662d92ab5e73bc67d94aaac6570e59a
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.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.