[Linux/rust] Implemented high-res microphone support#655
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Adds AAC-ELD decoding using ffmpegs libavcodec and pipes the decoded 0x58 AACP stream into a virtual PipeWire input.
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Added support for Apple’s proprietary high-resolution microphone stream
A huge thank you to everyone in the reverse-engineering Discord channel who helped make this possible. Special thanks to @kavishdevar for the initial discovery, Bluetooth packet captures, and for figuring out the correct AACP command sequence.
How it works
AirPods are capable of transmitting a high-resolution mono microphone stream using Apple’s AACP protocol, while simultaneously maintaining high-quality audio playback over A2DP.
This pull request adds support for:
libavcodec(LGPL-licensed)TODO