[RK3288][Android6.0] 调试笔记 --- Camera配置信息dump方法

https://blog.csdn.net/kris_fei/article/details/76546417

Platform: Rockchip
OS: Android 6.0
Kernel: 3.10.92

系统默认提供了dump当前Camera所有配置及状态的方法，方便了调试。

---

方法：
#dumpsys media.camera

Camera module HAL API version: 0x1
Camera module API version: 0x1
Camera module name: RK29_ICS_CameraHal_Module
Camera module author: RockChip
Number of camera devices: 2
Active Camera Clients:
[
(Camera ID: 0, Cost: 100, PID: 1158, Priority: 2147483645, User Id: 0, Client Package Name: com.android.camera2, Conflicting Client Devices: {})
]
Allowed users:
0
Vendor tags left unimplemented.

Prior client events (most recent at top):
  01-07 06:27:46 : CONNECT device 0 client for package com.android.camera2 (PID 1158)
  01-07 06:27:39 : DISCONNECT device 1 client for package media (PID 213)
  01-07 06:27:39 : DISCONNECT device 0 client for package media (PID 213)
  01-07 06:27:35 : USER_SWITCH previous allowed users:  , current allowed users: 0

Camera 0 information:
  Facing: BACK
  Orientation: 0
  Resource Cost: 100
  Conflicting Devices: NONE
  Device version: 0x100
  Camera1 API shim is using parameters:
        CameraParameters::dump: mMap.size = 50
    antibanding: off
    antibanding-values: off,50hz,60hz,auto
    exposure-compensation: 0
    exposure-compensation-step: 1
    focal-length: 35
    focus-distances: 0.3,50,Infinity
    focus-mode: fixed
    focus-mode-values: fixed
    horizontal-view-angle: 10
    jpeg-quality: 70
    jpeg-thumbnail-height: 128
    jpeg-thumbnail-quality: 50
    jpeg-thumbnail-size-values: 0x0,160x128
    jpeg-thumbnail-width: 160
    max-exposure-compensation: 3
    max-num-detected-faces-hw: 0
    max-num-detected-faces-sw: 0
    max-num-focus-areas: 0
    max-num-metering-areas: 0
    max-zoom: 40
    min-exposure-compensation: -3
    picture-format: jpeg
    picture-format-values: jpeg
    picture-size: 1920x1080
    picture-size-values: 1920x1080,1280x720,640x480,320x240
    preferred-preview-size-for-video: 
    preview-format: yuv420sp
    preview-format-values: yuv420sp,yuv420p
    preview-fps-range: 30000,30000
    preview-fps-range-values: (30000,30000)
    preview-frame-rate: 30
    preview-frame-rate-values: 30
    preview-size: 640x480
    preview-size-values: 1920x1080,1280x720,640x480,320x240
    recording-hint: false
    rk-continous-pic-num: 1
    rk-previwe-h-force: 0
    rk-previwe-w-force: 0
    rotation: 0
    vertical-view-angle: 10
    video-frame-format: yuv420sp
    video-size: 
    video-size-values: 
    video-snapshot-supported: true
    video-stabilization-supported: false
    whitebalance: auto
    whitebalance-values: auto,incandescent,fluorescent,daylight,cloudy-daylight
    zoom: 0
    zoom-ratios: 100,105,110,115,120,125,130,135,140,145,150,155,160,165,170,175,180,185,190,195,200,205,210,215,220,225,230,235,240,245,250,255,260,265,270,275,280,285,290,295,300,
    zoom-supported: true
  Device 0 is open. Client instance dump:

Client priority level: 2147483645
Client PID: 1158
Client package: com.android.camera2
Client[0] (0xb735d0f0) with UID 10018
Latest set parameters:
CameraParameters::dump: mMap.size = 50
    antibanding: auto
    antibanding-values: off,50hz,60hz,auto
    exposure-compensation: 0
    exposure-compensation-step: 1
    focal-length: 35
    focus-distances: 0.3,50,Infinity
    focus-mode: fixed
    focus-mode-values: fixed
    horizontal-view-angle: 10
    jpeg-quality: 85
    jpeg-thumbnail-height: 128
    jpeg-thumbnail-quality: 85
    jpeg-thumbnail-size-values: 0x0,160x128
    jpeg-thumbnail-width: 160
    max-exposure-compensation: 3
    max-num-detected-faces-hw: 0
    max-num-detected-faces-sw: 0
    max-num-focus-areas: 0
    max-num-metering-areas: 0
    max-zoom: 40
    min-exposure-compensation: -3
    picture-format: jpeg
    picture-format-values: jpeg
    picture-size: 1920x1080
    picture-size-values: 1920x1080,1280x720,640x480,320x240
    preferred-preview-size-for-video: 
    preview-format: yuv420sp
    preview-format-values: yuv420sp,yuv420p
    preview-fps-range: 30000,30000
    preview-fps-range-values: (30000,30000)
    preview-frame-rate: 30
    preview-frame-rate-values: 30
    preview-size: 1920x1080
    preview-size-values: 1920x1080,1280x720,640x480,320x240
    recording-hint: false
    rk-continous-pic-num: 1
    rk-previwe-h-force: 0
    rk-previwe-w-force: 0
    rotation: 0
    vertical-view-angle: 10
    video-frame-format: yuv420sp
    video-size: 
    video-size-values: 
    video-snapshot-supported: true
    video-stabilization-supported: false
    whitebalance: auto
    whitebalance-values: auto,incandescent,fluorescent,daylight,cloudy-daylight
    zoom: 0
    zoom-ratios: 100,105,110,115,120,125,130,135,140,145,150,155,160,165,170,175,180,185,190,195,200,205,210,215,220,225,230,235,240,245,250,255,260,265,270,275,280,285,290,295,300,
    zoom-supported: true


Camera 1 information:
  Facing: FRONT
  Orientation: 0
  Resource Cost: 100
  Conflicting Devices: NONE
  Device version: 0x100
  Camera1 API shim is using parameters:
        CameraParameters::dump: mMap.size = 50
    antibanding: off
    antibanding-values: off,50hz,60hz,auto
    exposure-compensation: 0
    exposure-compensation-step: 1
    focal-length: 35
    focus-distances: 0.3,50,Infinity
    focus-mode: fixed
    focus-mode-values: fixed
    horizontal-view-angle: 10
    jpeg-quality: 70
    jpeg-thumbnail-height: 128
    jpeg-thumbnail-quality: 50
    jpeg-thumbnail-size-values: 0x0,160x128
    jpeg-thumbnail-width: 160
    max-exposure-compensation: 3
    max-num-detected-faces-hw: 0
    max-num-detected-faces-sw: 0
    max-num-focus-areas: 0
    max-num-metering-areas: 0
    max-zoom: 40
    min-exposure-compensation: -3
    picture-format: jpeg
    picture-format-values: jpeg
    picture-size: 1920x1080
    picture-size-values: 1920x1080,1280x720,640x480,320x240
    preferred-preview-size-for-video: 
    preview-format: yuv420sp
    preview-format-values: yuv420sp,yuv420p
    preview-fps-range: 30000,30000
    preview-fps-range-values: (30000,30000)
    preview-frame-rate: 30
    preview-frame-rate-values: 30
    preview-size: 640x480
    preview-size-values: 1920x1080,1280x720,640x480,320x240
    recording-hint: false
    rk-continous-pic-num: 1
    rk-previwe-h-force: 0
    rk-previwe-w-force: 0
    rotation: 0
    vertical-view-angle: 10
    video-frame-format: yuv420sp
    video-size: 
    video-size-values: 
    video-snapshot-supported: true
    video-stabilization-supported: false
    whitebalance: auto
    whitebalance-values: auto,incandescent,fluorescent,daylight,cloudy-daylight
    zoom: 0
    zoom-ratios: 100,105,110,115,120,125,130,135,140,145,150,155,160,165,170,175,180,185,190,195,200,205,210,215,220,225,230,235,240,245,250,255,260,265,270,275,280,285,290,295,300,
    zoom-supported: true
  Device 1 is closed, no client instance

Camera traces (0):
  No camera traces collected.

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---

代码：

• 当前状态部分：

frameworks/av/services/camera/libcameraservice/CameraService.cpp

status_t CameraService::dump(int fd, const Vector<String16>& args{
    ATRACE_CALL();

    String8 result("Dump of the Camera Service:\n");
    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
        result = result.format("Permission Denial: "
                "can't dump CameraService from pid=%d, uid=%d\n",
                getCallingPid(),
                getCallingUid());
        write(fd, result.string(), result.size());
    } else {
        bool locked = tryLock(mServiceLock);
        // failed to lock - CameraService is probably deadlocked
        if (!locked) {
            result.append("CameraService may be deadlocked\n");
            write(fd, result.string(), result.size());
        }

        bool hasClient = false;
        if (!mModule) {
            result = String8::format("No camera module available!\n");
            write(fd, result.string(), result.size());

            // Dump event log for error information
            dumpEventLog(fd);

            if (locked) mServiceLock.unlock();
            return NO_ERROR;
        }

        result = String8::format("Camera module HAL API version: 0x%x\n", mModule->getHalApiVersion());
        result.appendFormat("Camera module API version: 0x%x\n", mModule->getModuleApiVersion());
        result.appendFormat("Camera module name: %s\n", mModule->getModuleName());
        result.appendFormat("Camera module author: %s\n", mModule->getModuleAuthor());
        result.appendFormat("Number of camera devices: %d\n", mNumberOfCameras);
        String8 activeClientString = mActiveClientManager.toString();
        result.appendFormat("Active Camera Clients:\n%s", activeClientString.string());
        result.appendFormat("Allowed users:\n%s\n", toString(mAllowedUsers).string());

        sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor();
        if (desc == NULL) {
            result.appendFormat("Vendor tags left unimplemented.\n");
        } else {
            result.appendFormat("Vendor tag definitions:\n");
        }

        write(fd, result.string(), result.size());

        if (desc != NULL) {
            desc->dump(fd, /*verbosity*/2, /*indentation*/4);
        }

        dumpEventLog(fd);

        bool stateLocked = tryLock(mCameraStatesLock);
        if (!stateLocked) {
            result = String8::format("CameraStates in use, may be deadlocked\n");
            write(fd, result.string(), result.size());
        }

        for (auto& state : mCameraStates) {
            String8 cameraId = state.first;
            result = String8::format("Camera %s information:\n", cameraId.string());
            camera_info info;

            // TODO: Change getCameraInfo + HAL to use String cameraIds
            status_t rc = mModule->getCameraInfo(cameraIdToInt(cameraId), &info);
            if (rc != OK) {
                result.appendFormat("  Error reading static information!\n");
                write(fd, result.string(), result.size());
            } else {
                result.appendFormat("  Facing: %s\n",
                        info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
                result.appendFormat("  Orientation: %d\n", info.orientation);
                int deviceVersion;
                if (mModule->getModuleApiVersion() < CAMERA_MODULE_API_VERSION_2_0) {
                    deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
                } else {
                    deviceVersion = info.device_version;
                }

                auto conflicting = state.second->getConflicting();
                result.appendFormat("  Resource Cost: %d\n", state.second->getCost());
                result.appendFormat("  Conflicting Devices:");
                for (auto& id : conflicting) {
                    result.appendFormat(" %s", cameraId.string());
                }
                if (conflicting.size() == 0) {
                    result.appendFormat(" NONE");
                }
                result.appendFormat("\n");

                result.appendFormat("  Device version: %#x\n", deviceVersion);
                if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) {
                    result.appendFormat("  Device static metadata:\n");
                    write(fd, result.string(), result.size());
                    dump_indented_camera_metadata(info.static_camera_characteristics,
                            fd, /*verbosity*/2, /*indentation*/4);
                } else {
                    write(fd, result.string(), result.size());
                }

                CameraParameters p = state.second->getShimParams();
                if (!p.isEmpty()) {
                    result = String8::format("  Camera1 API shim is using parameters:\n        ");
                    write(fd, result.string(), result.size());
                    p.dump(fd, args);
                }
            }

            auto clientDescriptor = mActiveClientManager.get(cameraId);
            if (clientDescriptor == nullptr) {
                result = String8::format("  Device %s is closed, no client instance\n",
                        cameraId.string());
                write(fd, result.string(), result.size());
                continue;
            }
            hasClient = true;
            result = String8::format("  Device %s is open. Client instance dump:\n\n",
                    cameraId.string());
            result.appendFormat("Client priority level: %d\n", clientDescriptor->getPriority());
            result.appendFormat("Client PID: %d\n", clientDescriptor->getOwnerId());

            auto client = clientDescriptor->getValue();
            result.appendFormat("Client package: %s\n",
                    String8(client->getPackageName()).string());
            write(fd, result.string(), result.size());

            client->dumpClient(fd, args);
        }

        if (stateLocked) mCameraStatesLock.unlock();

        if (!hasClient) {
            result = String8::format("\nNo active camera clients yet.\n");
            write(fd, result.string(), result.size());
        }

        if (locked) mServiceLock.unlock();

        // Dump camera traces if there were any
        write(fd, "\n", 1);
        camera3::CameraTraces::dump(fd, args);

        // change logging level
        int n = args.size();
        for (int i = 0; i + 1 < n; i++) {
            String16 verboseOption("-v");
            if (args[i] == verboseOption) {
                String8 levelStr(args[i+1]);
                int level = atoi(levelStr.string());
                result = String8::format("\nSetting log level to %d.\n", level);
                setLogLevel(level);
                write(fd, result.string(), result.size());
            }
        }
    }
    return NO_ERROR;
}

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• 当前参数配置部分：

frameworks/av/camera/CameraParameters.cpp

status_t CameraParameters::dump(int fd, const Vector<String16>& /*args*/) const
{
    const size_t SIZE = 256;
    char buffer[SIZE];
    String8 result;
    snprintf(buffer, 255, "CameraParameters::dump: mMap.size = %zu\n", mMap.size());
    result.append(buffer);
    for (size_t i = 0; i < mMap.size(); i++) {
        String8 k, v;
        k = mMap.keyAt(i);
        v = mMap.valueAt(i);
        snprintf(buffer, 255, "\t%s: %s\n", k.string(), v.string());
        result.append(buffer);
    }
    write(fd, result.string(), result.size());
    return NO_ERROR;
}