camx与chi交互

最新推荐文章于 2025-04-24 02:29:38 发布

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本文深入探讨Camera HAL 3.0模块的初始化过程，重点关注传感器信息(sensorInfo)的获取方式。通过CameraModule::init()函数，详细分析了chi_get_num_cameras、ExtensionModule::EnumerateCameras等函数的调用流程，以及ChiGetCameraInfo和ChiContext::GetCameraInfo的实现细节，揭示了cameraId和sensorId的关系。

前面说了hw_get_module和camhal3entry，camchi的交互

下面详细看一下部分细节：

1.我一直好奇的sensorInfo怎么来的

调用过程：
CameraModule::init()过程

chi_get_num_cameras

ExtensionModule::EnumerateCameras

 ChiGetCameraInfo

ChiContext::GetCameraInfo

比较重要的函数：
以前一直分不清各种cameraId，特意留意一下
这里cameraId是按照sensorId来遍历

InitializeStaticMetadata(cameraId, pCameraInfo)它从 m_pHwEnvironment->GetCameraInfo获得cameraInfo

CameraInfo* pCameraInfo = static_cast<CameraInfo*>(pChiCameraInfo->pLegacy);

pImageSensorData->GetSensorStaticCapability(&staticCaps, cameraId);获得sensor的一些特性

 m_sensorInfoTable[cameraID].pData  //这个应该是由com.qti.sensormodule.***.bin来的

CamxResult ChiContext::GetCameraInfo(
    UINT32         cameraId,
    ChiCameraInfo* pCameraInfo)
{
    CamxResult result = CamxResultSuccess;

    if ((NULL != pCameraInfo) && (cameraId < GetNumCameras()))
    {
        result = InitializeStaticMetadata(cameraId, pCameraInfo);

        ImageSensorModuleData*       pImageSensorModuleData =
            // NOWHINE CP036a: Since the function is const, had to add the const_cast
            const_cast<ImageSensorModuleData*>(m_pHwEnvironment->GetImageSensorModuleData(cameraId));
        ImageSensorData*             pImageSensorData       = pImageSensorModuleData->GetSensorDataObject();
        const ResolutionInformation* pResolutionInfo        = pImageSensorData->GetResolutionInfo();

        pCameraInfo->numSensorModes = pResolutionInfo->resolutionDataCount;

        SensorModuleStaticCaps staticCaps = { 0 };
        pImageSensorData->GetSensorStaticCapability(&staticCaps, cameraId);

        pCameraInfo->sensorCaps.pixelSize          = staticCaps.pixelSize;
        pCameraInfo->sensorCaps.activeArray.left   = staticCaps.activeArraySize.xMin;
        pCameraInfo->sensorCaps.activeArray.top    = staticCaps.activeArraySize.yMin;
        pCameraInfo->sensorCaps.activeArray.width  = staticCaps.activeArraySize.width;
        pCameraInfo->sensorCaps.activeArray.height = staticCaps.activeArraySize.height;
        pCameraInfo->sensorCaps.pRawOTPData        = staticCaps.OTPData.EEPROMInfo.rawOTPData.pRawData;
        pCameraInfo->sensorCaps.rawOTPDataSize     = staticCaps.OTPData.EEPROMInfo.rawOTPData.rawDataSize;
        pCameraInfo->sensorCaps.size               = sizeof(CHISENSORCAPS);
        pCameraInfo->sensorCaps.pSensorName        = staticCaps.pSensorName;

        if (NULL != pImageSensorModuleData->GetLensInfo())
        {
            pCameraInfo->lensCaps.focalLength  = static_cast<FLOAT>(pImageSensorModuleData->GetLensInfo()->focalLength);
            pCameraInfo->lensCaps.horViewAngle = static_cast<FLOAT>(pImageSensorModuleData->GetLensInfo()->horizontalViewAngle);
        }
        pCameraInfo->lensCaps.size          = sizeof(CHILENSCAPS);
        pCameraInfo->lensCaps.isFixedFocus  = (pImageSensorModuleData->GetActuatorDataObject() == NULL) ? TRUE : FALSE;

        pCameraInfo->size = sizeof(CHICAMERAINFO);
    }
    else
    {
        CAMX_LOG_WARN(CamxLogGroupHAL,
                       "Invalid arguments cameraId = %d, m_numImageSensors = %d, pCameraInfo = %p",
                       cameraId,
                       GetNumCameras(),
                       pCameraInfo);

        result = CamxResultEInvalidArg;
    }