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videoio: add routines to query information about backends API

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into cv::videoio_registry namespace
This commit is contained in:
Alexander Alekhin
2018-07-19 16:14:50 +03:00
parent 905da2994a
commit 270cc3bcbc
8 changed files with 213 additions and 57 deletions
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modules/videoio/include/opencv2/videoio.hpp
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@defgroup videoio_c C API for video I/O
@defgroup videoio_ios iOS glue for video I/O
@defgroup videoio_winrt WinRT glue for video I/O
@defgroup videoio_registry Query I/O API backends registry
@}
*/
modules/videoio/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 "unknown"
@param api backend ID (#VideoCaptureAPIs)
*/
CV_EXPORTS_W cv::String getBackendName(VideoCaptureAPIs api);
/** @brief Returns list of all builtin 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::VideoWriter()` */
CV_EXPORTS_W std::vector<VideoCaptureAPIs> getWriterBackends();
//! @}
}} // namespace
#endif // OPENCV_VIDEOIO_REGISTRY_HPP