和你一起終身學(xué)習(xí)，這里是程序員Android

經(jīng)典好文推薦，通過閱讀本文，您將收獲以下知識點(diǎn):

一、Camx trace 調(diào)試開關(guān)設(shè)置
二、Camx 調(diào)試開關(guān)設(shè)置懶人腳本
三、Camera 冷啟動(dòng)階段分解分析

一、Camx trace 調(diào)試開關(guān)設(shè)置

1.設(shè)置 camxoverridesettings trace開關(guān)

    adb  root
    adb  remount
    adb  shell "echo traceGroupsEnable=0x10080 >> /vendor/etc/camera/camxoverridesettings.txt"
    adb  shell "echo traceErrorEnable=TRUE     >> /vendor/etc/camera/camxoverridesettings.txt"
    adb  shell "echo traceOutputEnable=0x10080 >> /vendor/etc/camera/camxoverridesettings.txt"
    adb reboot

2. 重啟后設(shè)置開啟camx trace 開關(guān)

因?yàn)?camxoverridesettings 只有重啟之后可以生效，所以重啟完成后需要開啟trace 開關(guān)，既可以開始抓取Camera的 Systrace。

 adb shell "echo 1 > d/tracing/events/camera/enable"

二、Camx 調(diào)試開關(guān)設(shè)置懶人腳本

下面腳本主要用來設(shè)置Camx debug trace 開關(guān)的，內(nèi)容如下：

#bin/bash

# setting camxoverridesettings prop
funSetCamxoverridesettings(){

    adb  shell "echo traceGroupsEnable=0x10080 >> /vendor/etc/camera/camxoverridesettings.txt"
    adb  shell "echo traceErrorEnable=TRUE     >> /vendor/etc/camera/camxoverridesettings.txt"
    adb  shell "echo traceOutputEnable=0x10080 >> /vendor/etc/camera/camxoverridesettings.txt"
}

# setting CameraTrace prop
funEnableCameraTrace(){

    adb shell "echo 1 > d/tracing/events/camera/enable"
}

# cat setting result
funCatCameraProp(){
    echo "--------------------------------------------"
    echo "please check Camera trace prop is set sucess"
    echo "--------------------------------------------"
    echo "camxoverridesettings prop :*****************"
    adb shell cat /vendor/etc/camera/camxoverridesettings.txt
    echo "tracing prop :******************************"
    adb shell cat d/tracing/events/camera/enable
}

# it's only used in debug version
funRemountDevice(){
    adb root
    adb remount
    
    if [ $? -eq 0 ]; then

     echo "remount success"
     funSetCamxoverridesettings
     adb shell cat  /vendor/etc/camera/camxoverridesettings.txt

     for((i=0;$i<=10;i++))
         do
         sleep 1
         echo "waring !!! the phone will reboot after $i s"
         done

     adb reboot
    
    for((i=0;$i<=50;i++))
         do
         sleep 1
         echo "waiting phone is reboot after  $i s "
         done
         adb root
         adb remount
         funEnableCameraTrace
         funCatCameraProp
    else
    
     echo "remount failed,please remount the devices"
     
    fi
}


# main 
funRemountDevice
echo "input any num exit "
read num

查看Camera 相關(guān)進(jìn)程

測試后查看下Camera 相關(guān)進(jìn)程，有助于后續(xù)Systrace 有選擇的分析查看。

C:\Users\ProgramAndroid>adb shell  ps | findstr camera
cameraserver   810     1 4396356 124740 0                   0 S android.hardware.camera.provider@2.4-service_64
cameraserver   807     1   37792   3240 0                   0 S vendor.oneplus.hardware.camera@1.0-service
cameraserver  1418     1   69628  11096 0                   0 S cameraserver
system        6519   683 5221532  33168 0                   0 S com.oneplus.camera.service
u0_a130       9163   683 6052676  46388 0                   0 S com.oneplus.camera.pictureprocessing
system       10641   683 5594508  84672 0                   0 S com.wingtech.cameraCalibration
u0_a138      12467   683 7046152 135544 0                   0 S com.oneplus.camera