cmake: Move frontend plugins into main plugins dir

Frontend plugins should not require being placed in the frontend
directory to be built successfully. Indeed they should only depend
on libobs and the obs-frontend-api and thus their source tree should
be able to exist anywhere (even standalone) and the plugin should still
compile successfully (just like any 3rd party plugin).

Thus moving those plugins into the main plugin directory ensures that
they don't require on any "special sauce" within the source tree to
compile.

frontend/CMakeLists.txt

@@ -64,8 +64,6 @@ include(cmake/feature-youtube.cmake)
 include(cmake/feature-whatsnew.cmake)
 include(cmake/feature-idian-playground.cmake)
 
-add_subdirectory(plugins)
-
 configure_file(cmake/templates/ui-config.h.in ui-config.h)
 
 target_sources(

frontend/plugins/CMakeLists.txt

@@ -1,4 +0,0 @@
-add_subdirectory(aja-output-ui)
-add_subdirectory(decklink-captions)
-add_subdirectory(decklink-output-ui)
-add_subdirectory(frontend-tools)

plugins/CMakeLists.txt

@@ -36,12 +36,28 @@ add_obs_plugin(
     PLATFORMS WINDOWS MACOS LINUX
     WITH_MESSAGE
 )
+add_obs_plugin(aja-output-ui PLATFORMS WINDOWS MACOS LINUX WITH_MESSAGE)
 add_obs_plugin(coreaudio-encoder PLATFORMS WINDOWS MACOS)
 add_obs_plugin(
     decklink
     PLATFORMS WINDOWS MACOS LINUX
     WITH_MESSAGE
 )
+add_obs_plugin(
+    decklink-captions
+    PLATFORMS WINDOWS MACOS LINUX
+    WITH_MESSAGE
+)
+add_obs_plugin(
+    decklink-output-ui
+    PLATFORMS WINDOWS MACOS LINUX
+    WITH_MESSAGE
+)
+add_obs_plugin(
+    frontend-tools
+    PLATFORMS WINDOWS MACOS LINUX
+    WITH_MESSAGE
+)
 add_obs_plugin(image-source)
 add_obs_plugin(linux-alsa PLATFORMS LINUX FREEBSD OPENBSD)
 add_obs_plugin(linux-capture PLATFORMS LINUX FREEBSD OPENBSD)

plugins/aja-output-ui/CMakeLists.txt

@@ -58,7 +58,7 @@ endif()
 
 set_target_properties_obs(
   aja-output-ui
-  PROPERTIES FOLDER frontend
+  PROPERTIES FOLDER plugins/aja
              PREFIX ""
              AUTOMOC ON
              AUTOUIC ON

plugins/decklink-output-ui/CMakeLists.txt

@@ -47,7 +47,7 @@ endif()
 
 set_target_properties_obs(
   decklink-output-ui
-  PROPERTIES FOLDER frontend
+  PROPERTIES FOLDER plugins/decklink
              PREFIX ""
              AUTOMOC ON
              AUTOUIC ON

plugins/frontend-tools/CMakeLists.txt

@@ -83,7 +83,7 @@ endif()
 
 set_target_properties_obs(
   frontend-tools
-  PROPERTIES FOLDER frontend
+  PROPERTIES FOLDER plugins/frontend-tools
              PREFIX ""
              AUTOMOC ON
              AUTOUIC ON