Enable GStreamer 1.x support by default.

GStreamer 1.x is universally available, and with 0.10 being deprecated,
there should be no reason to default to 0.10 stil.

CMakeLists.txt

@@ -124,7 +124,7 @@ OCV_OPTION(WITH_EIGEN          "Include Eigen2/Eigen3 support"               ON)
 OCV_OPTION(WITH_VFW            "Include Video for Windows support"           ON   IF WIN32 )
 OCV_OPTION(WITH_FFMPEG         "Include FFMPEG support"                      ON   IF (NOT ANDROID AND NOT IOS))
 OCV_OPTION(WITH_GSTREAMER      "Include Gstreamer support"                   ON   IF (UNIX AND NOT APPLE AND NOT ANDROID) )
-OCV_OPTION(WITH_GSTREAMER_1_X  "Include Gstreamer 1.x support"               OFF)
+OCV_OPTION(WITH_GSTREAMER_0_10 "Enable Gstreamer 0.10 support (instead of 1.x)"                              OFF )
 OCV_OPTION(WITH_GTK            "Include GTK support"                         ON   IF (UNIX AND NOT APPLE AND NOT ANDROID) )
 OCV_OPTION(WITH_IPP            "Include Intel IPP support"                   OFF  IF (MSVC OR X86 OR X86_64) )
 OCV_OPTION(WITH_JASPER         "Include JPEG2K support"                      ON   IF (NOT IOS) )

cmake/OpenCVFindLibsVideo.cmake

@@ -12,28 +12,8 @@ endif(WITH_VFW)
 
 # --- GStreamer ---
 ocv_clear_vars(HAVE_GSTREAMER)
-# try to find gstreamer 0.10 first
-if(WITH_GSTREAMER AND NOT WITH_GSTREAMER_1_X)
-  CHECK_MODULE(gstreamer-base-0.10 HAVE_GSTREAMER_BASE)
-  CHECK_MODULE(gstreamer-video-0.10 HAVE_GSTREAMER_VIDEO)
-  CHECK_MODULE(gstreamer-app-0.10 HAVE_GSTREAMER_APP)
-  CHECK_MODULE(gstreamer-riff-0.10 HAVE_GSTREAMER_RIFF)
-  CHECK_MODULE(gstreamer-pbutils-0.10 HAVE_GSTREAMER_PBUTILS)
-
-  if(HAVE_GSTREAMER_BASE AND HAVE_GSTREAMER_VIDEO AND HAVE_GSTREAMER_APP AND HAVE_GSTREAMER_RIFF AND HAVE_GSTREAMER_PBUTILS)
-      set(HAVE_GSTREAMER TRUE)
-      set(GSTREAMER_BASE_VERSION ${ALIASOF_gstreamer-base-0.10_VERSION})
-      set(GSTREAMER_VIDEO_VERSION ${ALIASOF_gstreamer-video-0.10_VERSION})
-      set(GSTREAMER_APP_VERSION ${ALIASOF_gstreamer-app-0.10_VERSION})
-      set(GSTREAMER_RIFF_VERSION ${ALIASOF_gstreamer-riff-0.10_VERSION})
-      set(GSTREAMER_PBUTILS_VERSION ${ALIASOF_gstreamer-pbutils-0.10_VERSION})
-  endif()
-
-endif(WITH_GSTREAMER AND NOT WITH_GSTREAMER_1_X)
-
-# if gstreamer 0.10 was not found, or we specified we wanted 1.x, try to find it
-if(WITH_GSTREAMER_1_X OR NOT HAVE_GSTREAMER)
-  #check for 1.x
+# try to find gstreamer 1.x first
+if(WITH_GSTREAMER AND NOT WITH_GSTREAMER_0_10)
   CHECK_MODULE(gstreamer-base-1.0 HAVE_GSTREAMER_BASE)
   CHECK_MODULE(gstreamer-video-1.0 HAVE_GSTREAMER_VIDEO)
   CHECK_MODULE(gstreamer-app-1.0 HAVE_GSTREAMER_APP)
@@ -49,7 +29,25 @@ if(WITH_GSTREAMER_1_X OR NOT HAVE_GSTREAMER)
       set(GSTREAMER_PBUTILS_VERSION ${ALIASOF_gstreamer-pbutils-1.0_VERSION})
   endif()
 
-endif(WITH_GSTREAMER_1_X OR NOT HAVE_GSTREAMER)
+endif(WITH_GSTREAMER AND NOT WITH_GSTREAMER_0_10)
+
+# if gstreamer 1.x was not found, or we specified we wanted 0.10, try to find it
+if(WITH_GSTREAMER_0_10 OR NOT HAVE_GSTREAMER)
+  CHECK_MODULE(gstreamer-base-0.10 HAVE_GSTREAMER_BASE)
+  CHECK_MODULE(gstreamer-video-0.10 HAVE_GSTREAMER_VIDEO)
+  CHECK_MODULE(gstreamer-app-0.10 HAVE_GSTREAMER_APP)
+  CHECK_MODULE(gstreamer-riff-0.10 HAVE_GSTREAMER_RIFF)
+  CHECK_MODULE(gstreamer-pbutils-0.10 HAVE_GSTREAMER_PBUTILS)
+
+  if(HAVE_GSTREAMER_BASE AND HAVE_GSTREAMER_VIDEO AND HAVE_GSTREAMER_APP AND HAVE_GSTREAMER_RIFF AND HAVE_GSTREAMER_PBUTILS)
+      set(HAVE_GSTREAMER TRUE)
+      set(GSTREAMER_BASE_VERSION ${ALIASOF_gstreamer-base-0.10_VERSION})
+      set(GSTREAMER_VIDEO_VERSION ${ALIASOF_gstreamer-video-0.10_VERSION})
+      set(GSTREAMER_APP_VERSION ${ALIASOF_gstreamer-app-0.10_VERSION})
+      set(GSTREAMER_RIFF_VERSION ${ALIASOF_gstreamer-riff-0.10_VERSION})
+      set(GSTREAMER_PBUTILS_VERSION ${ALIASOF_gstreamer-pbutils-0.10_VERSION})
+  endif()
+endif(WITH_GSTREAMER_0_10 OR NOT HAVE_GSTREAMER)
 
 # --- unicap ---
 ocv_clear_vars(HAVE_UNICAP)