Android P 系统和第三方Camera方向适配修改

最新推荐文章于 2025-07-03 10:31:50 发布

原创最新推荐文章于 2025-07-03 10:31:50 发布 · 3.1k 阅读

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CC 4.0 BY-SA版权

本文深入解析了Android系统中Camera预览方向的设置方法，详细介绍了通过调用Camera2Client的commandSetDisplayOrientationL函数来确保预览方向正确，并探讨了在不同场景下设置旋转角度的实现细节。

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1.preview方向
Call setDisplayOrientation(int) to ensure
correct orientation of preview.---->设preview
目前追踪到preview设置地方在这里：

frameworks/av/services/camera/libcameraservice/api1/Camera2Client.cpp

status_t Camera2Client::commandSetDisplayOrientationL(int degrees) {
    int transform = Parameters::degToTransform(degrees,
            mCameraFacing == CAMERA_FACING_FRONT);
    if (transform == -1) {
        ALOGE("%s: Camera %d: Error setting %d as display orientation value",
                __FUNCTION__, mCameraId, degrees);
        return BAD_VALUE;
    }
    SharedParameters::Lock l(mParameters);
    if (transform != l.mParameters.previewTransform &&
            getPreviewStreamId() != NO_STREAM) {
        mDevice->setStreamTransform(getPreviewStreamId(), transform);
    }
    l.mParameters.previewTransform = transform;
    return OK;
}

frameworks/av/services/camera/libcameraservice/api1/client2/Parameters.cpp

int Parameters::degToTransform(int degrees, bool mirror) {
    if (!mirror) {
        if (degrees == 0) return 0;
        else if (degrees == 90) return HAL_TRANSFORM_ROT_90;
        else if (degrees == 180) return HAL_TRANSFORM_ROT_180;
        else if (degrees == 270) return HAL_TRANSFORM_ROT_270;
    } else {  // Do mirror (horizontal flip)
        if (degrees == 0) {           // FLIP_H and ROT_0
            return HAL_TRANSFORM_FLIP_H;
        } else if (degrees == 90) {   // FLIP_H and ROT_90
            return HAL_TRANSFORM_FLIP_H | HAL_TRANSFORM_ROT_90;
        } else if (degrees == 180) {  // FLIP_H and ROT_180
            return HAL_TRANSFORM_FLIP_V;
        } else if (degrees == 270) {  // FLIP_H and ROT_270
            return HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_ROT_90;
        }
    }
    ALOGE("%s: Bad input: %d", __FUNCTION__, degrees);
    return -1;
}

可以在degToTransform这里加log看下qq或者微信二维码时候传来的degrees和mirror是什么，和正常preview是不是不一样，然后对应修改

2.系统Camera 预览方向
frameworks/av/camera/CameraUtils.cpp


    if (!mirror) {
        switch (orientation) {
            case 0:
                flags = 0;
                break;
            case 90:
                flags = NATIVE_WINDOW_TRANSFORM_ROT_90;
                break;
            case 180:
                flags = NATIVE_WINDOW_TRANSFORM_ROT_180;
                break;
            case 270:
                flags = NATIVE_WINDOW_TRANSFORM_ROT_270;
                break;
            default:
                ALOGE("%s: Invalid HAL android.sensor.orientation value: %d",
                      __FUNCTION__, orientation);
                return INVALID_OPERATION;
        }
    } else {
        // Front camera needs to be horizontally flipped for mirror-like behavior.
        // Note: Flips are applied before rotates; using XOR here as some of these flags are
        // composed in terms of other flip/rotation flags, and are not bitwise-ORable.
        switch (orientation) {
            case 0:
                flags = NATIVE_WINDOW_TRANSFORM_FLIP_H;
                break;
            case 90:
                flags = NATIVE_WINDOW_TRANSFORM_FLIP_H ^
                        NATIVE_WINDOW_TRANSFORM_ROT_270;
                break;
            case 180:
                flags = NATIVE_WINDOW_TRANSFORM_FLIP_H ^
                        NATIVE_WINDOW_TRANSFORM_ROT_180;
                break;
            case 270:
                flags = NATIVE_WINDOW_TRANSFORM_FLIP_H ^
                        NATIVE_WINDOW_TRANSFORM_ROT_90;

                break;

3.修改整体的Camera方向
vendor/mediatek/proprietary/custom/tb8788p1_64_bsp/hal/imgsensor_src/cfg_setting_imgsensor.cpp

static CUSTOM_CFG gCustomCfg[] = {
    {
        .sensorIdx     = IMGSENSOR_SENSOR_IDX_MAIN,
        .mclk          = CUSTOM_CFG_MCLK_1,
        .port          = CUSTOM_CFG_CSI_PORT_0,
        .dir           = CUSTOM_CFG_DIR_REAR,
        .bitOrder      = CUSTOM_CFG_BITORDER_9_2,
        .orientation   = 0,
        .horizontalFov = 67,
        .verticalFov   = 49
    },
    {
        .sensorIdx     = IMGSENSOR_SENSOR_IDX_SUB,
        .mclk          = CUSTOM_CFG_MCLK_2,
        .port          = CUSTOM_CFG_CSI_PORT_1,
        .dir           = CUSTOM_CFG_DIR_FRONT,
        .bitOrder      = CUSTOM_CFG_BITORDER_9_2,
        .orientation   = 0,
        .horizontalFov = 63,
        .verticalFov   = 40
    },