点阵完成，加入opencv

3rdpart/OpenCV/include/opencv2/videoio/registry.hpp

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+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
+#ifndef OPENCV_VIDEOIO_REGISTRY_HPP
+#define OPENCV_VIDEOIO_REGISTRY_HPP
+
+#include <opencv2/videoio.hpp>
+
+namespace cv { namespace videoio_registry {
+/** @addtogroup videoio_registry
+This section contains API description how to query/configure available Video I/O backends.
+
+Runtime configuration options:
+- enable debug mode: `OPENCV_VIDEOIO_DEBUG=1`
+- change backend priority: `OPENCV_VIDEOIO_PRIORITY_<backend>=9999`
+- disable backend: `OPENCV_VIDEOIO_PRIORITY_<backend>=0`
+- specify list of backends with high priority (>100000): `OPENCV_VIDEOIO_PRIORITY_LIST=FFMPEG,GSTREAMER`
+
+@{
+ */
+
+
+/** @brief Returns backend API name or "UnknownVideoAPI(xxx)"
+@param api backend ID (#VideoCaptureAPIs)
+*/
+CV_EXPORTS_W cv::String getBackendName(VideoCaptureAPIs api);
+
+/** @brief Returns list of all available backends */
+CV_EXPORTS_W std::vector<VideoCaptureAPIs> getBackends();
+
+/** @brief Returns list of available backends which works via `cv::VideoCapture(int index)` */
+CV_EXPORTS_W std::vector<VideoCaptureAPIs> getCameraBackends();
+
+/** @brief Returns list of available backends which works via `cv::VideoCapture(filename)` */
+CV_EXPORTS_W std::vector<VideoCaptureAPIs> getStreamBackends();
+
+/** @brief Returns list of available backends which works via `cv::VideoCapture(buffer)` */
+CV_EXPORTS_W std::vector<VideoCaptureAPIs> getStreamBufferedBackends();
+
+/** @brief Returns list of available backends which works via `cv::VideoWriter()` */
+CV_EXPORTS_W std::vector<VideoCaptureAPIs> getWriterBackends();
+
+/** @brief Returns true if backend is available */
+CV_EXPORTS_W bool hasBackend(VideoCaptureAPIs api);
+
+/** @brief Returns true if backend is built in (false if backend is used as plugin) */
+CV_EXPORTS_W bool isBackendBuiltIn(VideoCaptureAPIs api);
+
+/** @brief Returns description and ABI/API version of videoio plugin's camera interface */
+CV_EXPORTS_W std::string getCameraBackendPluginVersion(
+    VideoCaptureAPIs api,
+    CV_OUT int& version_ABI,
+    CV_OUT int& version_API
+);
+
+/** @brief Returns description and ABI/API version of videoio plugin's stream capture interface */
+CV_EXPORTS_W std::string getStreamBackendPluginVersion(
+    VideoCaptureAPIs api,
+    CV_OUT int& version_ABI,
+    CV_OUT int& version_API
+);
+
+/** @brief Returns description and ABI/API version of videoio plugin's buffer capture interface */
+CV_EXPORTS_W std::string getStreamBufferedBackendPluginVersion(
+    VideoCaptureAPIs api,
+    CV_OUT int& version_ABI,
+    CV_OUT int& version_API
+);
+
+/** @brief Returns description and ABI/API version of videoio plugin's writer interface */
+CV_EXPORTS_W std::string getWriterBackendPluginVersion(
+    VideoCaptureAPIs api,
+    CV_OUT int& version_ABI,
+    CV_OUT int& version_API
+);
+
+
+//! @}
+}} // namespace
+
+#endif // OPENCV_VIDEOIO_REGISTRY_HPP