CameraX 等效于 Camera2 的 CaptureRequest

Question

我想将 ImageAnalysis 与 CameraX 一起使用，但要调整一些相机设置，例如自动对焦或自动白平衡、曝光和帧持续时间。

以下是我需要的设置示例以及我如何使用 Camera2 进行设置：

    captureRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_OFF)
    captureRequestBuilder.set(CaptureRequest.CONTROL_AWB_MODE, CameraMetadata.CONTROL_AWB_MODE_OFF)
    captureRequestBuilder.set(CaptureRequest.SENSOR_FRAME_DURATION, FRAME_DURATION_NS)
    captureRequestBuilder.set(CaptureRequest.SENSOR_EXPOSURE_TIME, EXPOSURE_TIME_LIMIT_NS)

如何将其“翻译”到 CameraX？​​p>

Answer 1

有用于自定义 CaptureRequest 参数的 Camera2InterOp。示例：

fun buildImageAnalysis() : ImageAnalysis {
    val builder = ImageAnalysis.Builder()
    val camera2InterOp = Camera2Interop.Extender(builder)
    camera2InterOp.setCaptureRequestOption(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_OFF)
    camera2InterOp.setCaptureRequestOption(CaptureRequest.CONTROL_AWB_MODE, CameraMetadata.CONTROL_AWB_MODE_OFF)
    camera2InterOp.setCaptureRequestOption(CaptureRequest.SENSOR_FRAME_DURATION, FRAME_DURATION_NS);
    camera2InterOp.setCaptureRequestOption(CaptureRequest.SENSOR_EXPOSURE_TIME, EXPOSURE_TIME_LIMIT_NS)
    return builder.build()
}