小蓝相机HDR拍照流程分析
和你一起终身学习，这里是程序员Android
经典好文推荐，通过阅读本文，您将收获以下知识点:
- HDR 场景下发 3 帧拍照请求
- HDR 3帧拍照请求帧（478,479 480）
- HDR 3帧 result callback帧
- HDR 算法处理
- 算法编解码处理
- HDR 拍照log关键字
1. HDR 场景下发 3 帧拍照请求
HDR 场景下，点击拍照按钮提交拍照请求，拍照请求帧为3帧（trace 中submitRequestList
下可以看到 3 个 createCaptureRequest
）。
点击拍照按钮提交拍照请求
2. HDR 3帧拍照请求帧（478,479 480）
3帧拍照请求帧
3. HDR 3帧 result callback帧
HDR 3帧 result callback帧
4. HDR 算法处理
HDR 算法处理
5.算法编解码处理
算法编解码处理
6. HDR 拍照log关键字
onShutterButtonFocus|connect call|Creating new stream|AlgoNativeInterface: HDR|AlgoNativeInterface: pAlgoParams|AlgoNativeInterface: algo process|IMG_20240829_195647.jpg|ACTION_UP|CAMAP_MAIN
部分log如下：
onShutterButtonFocus|connect call|Creating new stream|AlgoNativeInterface: HDR|AlgoNativeInterface: pAlgoParams|AlgoNativeInterface: algo process|IMG_20240829_195647.jpg|ACTION_UP|CAMAP_MAIN
// 启动 cameraactivity
行 205615: 08-29 19:56:29.548 10140 30284 30284 D _V_CAM_CameraActivity: CAMAP_MAIN: [Thread:main] CameraActivity---onStart, ActivityCode: 81415032
行 205620: 08-29 19:56:29.551 10140 30284 30284 D _V_CAM_CameraActivity: CAMAP_MAIN: [Thread:main] CameraActivity---onNewIntent, ActivityCode: 81415032
行 205755: 08-29 19:56:29.589 10140 30284 30284 V CAMAP_MAIN:: IS_LOG_CTRL_OPEN = true
行 205756: 08-29 19:56:29.589 10140 30284 30284 D _V_CAM_CameraActivity: CAMAP_MAIN: [Thread:main] CameraActivity---onResumeTask, ActivityCode: 81415032 version: 12.1.78.8
// 下发open camera
行 205856: 08-29 19:56:29.632 10140 30284 19959 D _V_CAM_CameraModeProxyIml: CAMAP_MAIN: [Thread:camera_task] task thread---open camera E, CameraParam [ facing : FACING_BACK, modeName : Normal, cameraType : Master, mVModeInfo :
行 205863: 08-29 19:56:29.634 10140 30284 19959 D _V_CAM_CameraModeProxyIml: CAMAP_MAIN: [Thread:camera_task] task thread---open camera X
// 连接cameraservice connect call
行 205884: 08-29 19:56:29.646 1047 1557 3193 I CameraService: CameraService::connect call (PID 30284 "com.android.camera", camera ID 0) and Camera API version 2
行 205956: 08-29 19:56:29.660 10140 30284 30284 D _V_CAM_StateMachine: CAMAP_MAIN: [Thread:main] change state --- photo : [ StateDestroy -> StateInit ]
// 配3路流 Creating new stream
行 206304: 08-29 19:56:29.769 1047 1557 3193 I Camera3-Device: Camera 0: Creating new stream 0: 1080 x 1080, format 34, dataspace 0 rotation 0 consumer usage 0, isShared 0, physicalCameraId , isMultiResolution 0 dynamicRangeProfile 0x1, streamUseCase 0, timestampBase 0, mirrorMode 0, colorSpace -1, useReadoutTimestamp 0
行 206330: 08-29 19:56:29.775 1047 1557 3193 I Camera3-Device: Camera 0: Creating new stream 1: 1080 x 1080, format 35, dataspace 146931712 rotation 0 consumer usage 0, isShared 0, physicalCameraId , isMultiResolution 0 dynamicRangeProfile 0x1, streamUseCase 0, timestampBase 0, mirrorMode 0, colorSpace -1, useReadoutTimestamp 0
行 206349: 08-29 19:56:29.787 1047 1557 3193 I Camera3-Device: Camera 0: Creating new stream 2: 3060 x 3060, format 35, dataspace 146931712 rotation 0 consumer usage 0, isShared 0, physicalCameraId , isMultiResolution 0 dynamicRangeProfile 0x1, streamUseCase 0, timestampBase 0, mirrorMode 0, colorSpace -1, useReadoutTimestamp 0
行 207156: 08-29 19:56:30.141 10140 30284 19992 D _V_CAM_CameraModeProxyIml: CAMAP_MAIN: [Thread:camera_callback] onConfigured mode = BackNormalMainMode
行 207163: 08-29 19:56:30.141 10140 30284 30284 D _V_CAM_StateMachine: CAMAP_MAIN: [Thread:main] change state --- photo : [ StateCameraOpened -> StateSessionCreated ]
// 开始起预览请求 startPreview
行 207247: 08-29 19:56:30.168 10140 30284 19959 D _V_CAM_CameraModeProxyIml: CAMAP_MAIN: [Thread:camera_task] ---startPreview PreviewParam { [previewdetect = 140821240225795], [eyeDetect = -1], [previewAiDetect = [-1, -1]], [vivo.control.ois = true], [relight = 0], [vivo.control.face.detect = true], [vcamsdk.repeating.VideoStabilization = true], [vivo.control.singleBlur_level = 0], [vivo.control.portrait.effect = 0], [vivo.record.eis.mode.enable = false], [vivo.control.motionVersion=17], [android.control.videoStabilizationMode=1], [vivo.control.sod.state=0], [vivo.parameter.temperature=43], [vivo.control.captureStateForDetect=0], [android.jpeg.orientation=90], [vivo.parameter.cameraColdStart=false], [custom.zoom=1.0], [custom.flash_mode=0], [custom.exposure_value=0], }
行 207407: 08-29 19:56:30.259 10140 30284 30284 D _V_CAM_ThumbnailAddition: CAMAP_MAIN: [Thread:main] updateThumbnailView
// 首帧可用callback onFirstFrameAvailableCallback onFirstFrameAvailable
行 207867: 08-29 19:56:30.431 10140 30284 19501 D _V_CAM_CameraActivity: CAMAP_MAIN: [Thread:VIEngine-Main] onFirstFrameAvailableCallback
行 207887: 08-29 19:56:30.437 10140 30284 30284 D _V_CAM_CameraActivity: CAMAP_MAIN: [Thread:main] onFirstFrameAvailable
// HDR 场景下点击拍照 ACTION_UP onShutterButtonFocus
行 211606: 08-29 19:56:32.015 10069 3054 3054 D _V_InputEventReceiver: dispatchInputEvent ,vLog[a2c672 StatusBar (client)] ,event=MotionEvent { action=ACTION_UP, actionButton=0, id[0]=0, x[0]=524.0, y[0]=420.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=76500757, downTime=76500650, deviceId=5, source=0x1002, displayId=0, eventId=17122441 }
行 215088: 08-29 19:56:33.250 10069 3054 3054 D _V_InputEventReceiver: dispatchInputEvent ,vLog[375f109 NotificationShade (client)] ,event=MotionEvent { action=ACTION_UP, actionButton=0, id[0]=0, x[0]=313.0, y[0]=651.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=76502116, downTime=76502045, deviceId=5, source=0x1002, displayId=0, eventId=980268846 }
行 222254: 08-29 19:56:37.928 10069 3054 3054 D _V_InputEventReceiver: dispatchInputEvent ,vLog[375f109 NotificationShade (client)] ,event=MotionEvent { action=ACTION_UP, actionButton=0, id[0]=0, x[0]=686.0, y[0]=2186.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=76506799, downTime=76505392, deviceId=5, source=0x1002, displayId=0, eventId=840324513 }
行 235965: 08-29 19:56:47.169 10140 30284 30284 D _V_CAM_BaseBottomBar: CAMAP_MAIN: [Thread:main] onShutterButtonFocus pressed = true
行 237770: 08-29 19:56:48.077 10122 10844 4581 D AlgoNativeInterface: algo process E
// HDR 算法处理
行 237774: 08-29 19:56:48.077 10122 10844 4581 D AlgoNativeInterface: algo process img[0] fd 109 width 3060 height 3060 stride 3072 scanline 3072 size 14155776 numFds 2 numInts 23 version 12
行 237775: 08-29 19:56:48.077 10122 10844 4581 D AlgoNativeInterface: algo process img[1] fd 111 width 3060 height 3060 stride 3072 scanline 3072 size 14155776 numFds 2 numInts 23 version 12
行 237776: 08-29 19:56:48.078 10122 10844 4581 D AlgoNativeInterface: algo process img[2] fd 113 width 3060 height 3060 stride 3072 scanline 3072 size 14155776 numFds 2 numInts 23 version 12
行 237779: 08-29 19:56:48.078 10122 10844 4581 D AlgoNativeInterface: algo process imageFormat: 0x23 requestId: 8
行 237814: 08-29 19:56:48.080 10122 10844 4581 D AlgoNativeInterface: HDR 3-frames version
行 237872: 08-29 19:56:48.090 10122 10844 4581 D AlgoNativeInterface: pAlgoParams->frameFlag: 1724932607175 localtime:20240829195647
// HDR 算法选帧 478 479 480 3帧
行 237889: 08-29 19:56:48.090 10122 10844 4581 D AlgoNativeInterface: pAlgoParams->frameId[0]: 478
行 237890: 08-29 19:56:48.090 10122 10844 4581 D AlgoNativeInterface: pAlgoParams->frameId[1]: 479
行 237891: 08-29 19:56:48.090 10122 10844 4581 D AlgoNativeInterface: pAlgoParams->frameId[2]: 480
行 237985: 08-29 19:56:48.095 10122 10844 4581 D AlgoNativeInterface: hdrGains[0]: 6.733059, hdrShutters[0]: 30.000000, hdrFrameIndex:0
行 237986: 08-29 19:56:48.095 10122 10844 4581 D AlgoNativeInterface: hdrGains[1]: 10.965449, hdrShutters[1]: 30.000000, hdrFrameIndex:1
行 237987: 08-29 19:56:48.095 10122 10844 4581 D AlgoNativeInterface: hdrGains[2]: 1.454850, hdrShutters[2]: 10.000000, hdrFrameIndex:2
行 238000: 08-29 19:56:48.096 10122 10844 4581 D AlgoNativeInterface: pAlgoParams->shotAeRegions left:0 top:0 right:0 bottom:0
行 238009: 08-29 19:56:48.098 10122 10844 4581 D AlgoNativeInterface: algo process: pAlgoParams->satCropRegions ltwh 0 0 0 0参考文献：
【腾讯文档】Android Framework 知识库
https://docs.qq.com/doc/DSXBmSG9VbEROUXF5
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