Android Camera hal

一：CameraService 加载camera.imx6.so

        源码位置：android6.0/frameworks/av/services/camera/libcameraservice/CameraService.cpp

void CameraService::onFirstRef()
{
    ALOGI("CameraService process starting");

    BnCameraService::onFirstRef();

    // Update battery life tracking if service is restarting
    BatteryNotifier& notifier(BatteryNotifier::getInstance());
    notifier.noteResetCamera();
    notifier.noteResetFlashlight();

    camera_module_t *rawModule;
    int err = hw_get_module(CAMERA_HARDWARE_MODULE_ID,
            (const hw_module_t **)&rawModule);
    if (err < 0) {
        ALOGE("Could not load camera HAL module: %d (%s)", err, strerror(-err));
        logServiceError("Could not load camera HAL module", err);
        mNumberOfCameras = 0;
        mNumberOfNormalCameras = 0;
        return;
    }

    mModule = new CameraModule(rawModule);
    err = mModule-&