CameraX与Camera2的CaptureRequest等价

Question

我想在CameraX中使用ImageAnalysy，但要调整一些相机设置，如自动对焦或自动白平衡、曝光和帧长。

下面是一个我需要的设置示例，以及我如何用Camera2设置它们：

    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)

Answer 1

有Camera2InterOp用于自定义CaptureRequest参数。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()
}