War Story: Implementing solution for 4G/5G voice call verification on AOSP quickly - Wig Cheng (Mobile Technologies)
歡迎來到 MOPCON 2023 共筆
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從這開始
War Begining
講者
AOSP
講者 wig cheng
服務公司 iei the world
bsp development
HMI human machine interface
- first search open source project : pine phone pro
- HAL 開發 聲卡RT5640 driver (.xml)
- hal porting
- linux alsa driver
- device tree 硬體描述檔
- linux device driver開發
- i2s v.s. pcm
- audacity
- click noise -> brtual force vs latancy tradeoff!
phone call subsystem
- nottx os
AOSP
android OS 總是存在我們的生活當中,點餐機,自助售票機…等
今天主要分享的都是android firmware
Motivation
英國巴士上的車機
聲音需要 speaker and mic
介面有hdmi
要給司機有語音通話的功能
Mobile phone call - Normal case I
Phone APK
Framework
- Audiopolicy service
- Audiofinger service
HAL driver
- tinyHAL
- Audio configuration
Linux Kernel
CPU內建 audio codec
講者超強!!!