cudacodec(build): fix detection in CMake, cleanup duplicate includes

cmake/OpenCVDetectCUDA.cmake

@@ -53,6 +53,7 @@ if(CUDA_FOUND)
       else()
         set(${_result} 1)
       endif()
+      unset(_header_result CACHE)
     endmacro()
     SEARCH_NVCUVID_HEADER("nvcuvid.h" HAVE_NVCUVID_HEADER)
     SEARCH_NVCUVID_HEADER("dynlink_nvcuvid.h" HAVE_DYNLINK_NVCUVID_HEADER)

modules/cudacodec/src/cuvid_video_source.hpp

@@ -44,17 +44,9 @@
 #ifndef __CUVID_VIDEO_SOURCE_HPP__
 #define __CUVID_VIDEO_SOURCE_HPP__
 
-#if defined(HAVE_DYNLINK_NVCUVID_HEADER)
-    #include <dynlink_nvcuvid.h>
-#elif defined(HAVE_NVCUVID_HEADER)
-    #include <nvcuvid.h>
-#endif
-#include "opencv2/core/private.cuda.hpp"
-#include "opencv2/cudacodec.hpp"
 #include "video_source.hpp"
 
-namespace cv { namespace cudacodec { namespace detail
+namespace cv { namespace cudacodec { namespace detail {
-{
 
 class CuvidVideoSource : public VideoSource
 {

modules/cudacodec/src/frame_queue.hpp

@@ -45,16 +45,8 @@
 #define __FRAME_QUEUE_HPP__
 
 #include "opencv2/core/utility.hpp"
-#include "opencv2/core/private.cuda.hpp"
 
-#if defined(HAVE_DYNLINK_NVCUVID_HEADER)
+namespace cv { namespace cudacodec { namespace detail {
-    #include <dynlink_nvcuvid.h>
-#elif defined(HAVE_NVCUVID_HEADER)
-    #include <nvcuvid.h>
-#endif
-
-namespace cv { namespace cudacodec { namespace detail
-{
 
 class FrameQueue
 {

modules/cudacodec/src/video_decoder.hpp

@@ -44,17 +44,7 @@
 #ifndef __VIDEO_DECODER_HPP__
 #define __VIDEO_DECODER_HPP__
 
-#if defined(HAVE_DYNLINK_NVCUVID_HEADER)
+namespace cv { namespace cudacodec { namespace detail {
-    #include <dynlink_nvcuvid.h>
-#elif defined(HAVE_NVCUVID_HEADER)
-    #include <nvcuvid.h>
-#endif
-
-#include "opencv2/core/private.cuda.hpp"
-#include "opencv2/cudacodec.hpp"
-
-namespace cv { namespace cudacodec { namespace detail
-{
 
 class VideoDecoder
 {

modules/cudacodec/src/video_parser.hpp

@@ -44,19 +44,10 @@
 #ifndef __VIDEO_PARSER_HPP__
 #define __VIDEO_PARSER_HPP__
 
-#if defined(HAVE_DYNLINK_NVCUVID_HEADER)
-    #include <dynlink_nvcuvid.h>
-#elif defined(HAVE_NVCUVID_HEADER)
-    #include <nvcuvid.h>
-#endif
-
-#include "opencv2/core/private.cuda.hpp"
-#include "opencv2/cudacodec.hpp"
 #include "frame_queue.hpp"
 #include "video_decoder.hpp"
 
-namespace cv { namespace cudacodec { namespace detail
+namespace cv { namespace cudacodec { namespace detail {
-{
 
 class VideoParser
 {

modules/cudacodec/src/video_source.hpp

@@ -44,12 +44,9 @@
 #ifndef __CUDACODEC_VIDEO_SOURCE_H__
 #define __CUDACODEC_VIDEO_SOURCE_H__
 
-#include "opencv2/core/private.cuda.hpp"
-#include "opencv2/cudacodec.hpp"
 #include "thread.hpp"
 
-namespace cv { namespace cudacodec { namespace detail
+namespace cv { namespace cudacodec { namespace detail {
-{
 
 class VideoParser;