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- Bartosz presents this slide deck
- there is 2 possible Audio HALs: USB Audio HAL and AVSP (?) Audio HAL (to be confirmed)We have more than 1 Audio HAL module in the system. There is always primary audio HAL that handles primary output (car speakers) and primary input (mic, aux, tuner, etc.) and in Android Automotive usually we also have USB audio HAL (dedicated to USB audio) and A2DP audio HAL (dedicated to Bluetooth A2DP). Different Audio HAL modules don't talk directly to each other, but the routing/bridging between them is handled via AudioFlinger/AudioPolicy based on audio policy configuration (where routing topology is defined).
- slide 6: grey boxes are external to AA
- Wassim: question on slide 14 about configuration
- Bartosz: configuration files are in the system partition or in the vendor partition, we lack a good concept for configuration, and for the
persistence of configuration as well, support tools would greatly help
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