fix corner case of libnvcuvid

* detect header automatically and not based on version number

cmake/OpenCVDetectCUDA.cmake

@@ -38,11 +38,30 @@ if(CUDA_FOUND)
   endif()
 
   if(WITH_NVCUVID)
+    macro(SEARCH_NVCUVID_HEADER _filename _result)
+      # place header file under CUDA_TOOLKIT_TARGET_DIR or CUDA_TOOLKIT_ROOT_DIR
+      find_path(_header_result
+        ${_filename}
+        PATHS "${CUDA_TOOLKIT_TARGET_DIR}" "${CUDA_TOOLKIT_ROOT_DIR}"
+        ENV CUDA_PATH
+        ENV CUDA_INC_PATH
+        PATH_SUFFIXES include
+        NO_DEFAULT_PATH
+        )
+      if("x${_header_result}" STREQUAL "x_header_result-NOTFOUND")
+        set(${_result} 0)
+      else()
+        set(${_result} 1)
+      endif()
+    endmacro()
+    SEARCH_NVCUVID_HEADER("nvcuvid.h" HAVE_NVCUVID_HEADER)
+    SEARCH_NVCUVID_HEADER("dynlink_nvcuvid.h" HAVE_DYNLINK_NVCUVID_HEADER)
     find_cuda_helper_libs(nvcuvid)
     if(WIN32)
       find_cuda_helper_libs(nvcuvenc)
     endif()
-    if(CUDA_nvcuvid_LIBRARY)
+    if(CUDA_nvcuvid_LIBRARY AND (${HAVE_NVCUVID_HEADER} OR ${HAVE_DYNLINK_NVCUVID_HEADER}))
+      # make sure to have both header and library before enabling
       set(HAVE_NVCUVID 1)
     endif()
     if(CUDA_nvcuvenc_LIBRARY)

cmake/templates/cvconfig.h.in

@@ -127,6 +127,8 @@
 
 /* NVIDIA Video Decoding API*/
 #cmakedefine HAVE_NVCUVID
+#cmakedefine HAVE_NVCUVID_HEADER
+#cmakedefine HAVE_DYNLINK_NVCUVID_HEADER
 
 /* NVIDIA Video Encoding API*/
 #cmakedefine HAVE_NVCUVENC

modules/cudacodec/src/cuvid_video_source.hpp

@@ -44,9 +44,9 @@
 #ifndef __CUVID_VIDEO_SOURCE_HPP__
 #define __CUVID_VIDEO_SOURCE_HPP__
 
-#if CUDA_VERSION >= 9000 && CUDA_VERSION < 10000
+#if defined(HAVE_DYNLINK_NVCUVID_HEADER)
     #include <dynlink_nvcuvid.h>
-#else
+#elif defined(HAVE_NVCUVID_HEADER)
     #include <nvcuvid.h>
 #endif
 #include "opencv2/core/private.cuda.hpp"

modules/cudacodec/src/frame_queue.hpp

@@ -47,9 +47,9 @@
 #include "opencv2/core/utility.hpp"
 #include "opencv2/core/private.cuda.hpp"
 
-#if CUDA_VERSION >= 9000 && CUDA_VERSION < 10000
+#if defined(HAVE_DYNLINK_NVCUVID_HEADER)
     #include <dynlink_nvcuvid.h>
-#else
+#elif defined(HAVE_NVCUVID_HEADER)
     #include <nvcuvid.h>
 #endif
 

modules/cudacodec/src/precomp.hpp

@@ -56,9 +56,9 @@
 #include "opencv2/core/private.cuda.hpp"
 
 #ifdef HAVE_NVCUVID
-    #if CUDA_VERSION >= 9000 && CUDA_VERSION < 10000
+    #if defined(HAVE_DYNLINK_NVCUVID_HEADER)
         #include <dynlink_nvcuvid.h>
-    #else
+    #elif defined(HAVE_NVCUVID_HEADER)
         #include <nvcuvid.h>
     #endif
 

modules/cudacodec/src/video_decoder.hpp

@@ -44,9 +44,9 @@
 #ifndef __VIDEO_DECODER_HPP__
 #define __VIDEO_DECODER_HPP__
 
-#if CUDA_VERSION >= 9000 && CUDA_VERSION < 10000
+#if defined(HAVE_DYNLINK_NVCUVID_HEADER)
     #include <dynlink_nvcuvid.h>
-#else
+#elif defined(HAVE_NVCUVID_HEADER)
     #include <nvcuvid.h>
 #endif
 

modules/cudacodec/src/video_parser.hpp

@@ -44,9 +44,9 @@
 #ifndef __VIDEO_PARSER_HPP__
 #define __VIDEO_PARSER_HPP__
 
-#if CUDA_VERSION >= 9000 && CUDA_VERSION < 10000
+#if defined(HAVE_DYNLINK_NVCUVID_HEADER)
     #include <dynlink_nvcuvid.h>
-#else
+#elif defined(HAVE_NVCUVID_HEADER)
     #include <nvcuvid.h>
 #endif