Refactor cmake scripts, reducing the amount of find_package(FFmpeg)

CMakeLists.txt

@@ -98,25 +98,30 @@ endif()
 cmake_minimum_required(VERSION 2.6)
 
 # Sound setup
-set(FFmpeg_FIND_COMPONENTS AVCODEC AVFORMAT AVUTIL SWSCALE SWRESAMPLE AVRESAMPLE)
 unset(FFMPEG_LIBRARIES CACHE)
-find_package(FFmpeg)
+
+find_package(FFmpeg REQUIRED)
+
+set (FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${SWSCALE_LIBRARY})
+
+message(STATUS ${FFMPEG_LIBRARIES})
 if ( NOT AVCODEC_FOUND OR NOT AVFORMAT_FOUND OR NOT AVUTIL_FOUND OR NOT SWSCALE_FOUND )
     message(FATAL_ERROR "FFmpeg component required, but not found!")
 endif()
 set(SOUND_INPUT_INCLUDES ${FFMPEG_INCLUDE_DIRS})
-set(SOUND_INPUT_LIBRARY ${FFMPEG_LIBRARIES} ${SWSCALE_LIBRARIES})
 if( SWRESAMPLE_FOUND )
     add_definitions(-DHAVE_LIBSWRESAMPLE)
-    set(SOUND_INPUT_LIBRARY ${FFMPEG_LIBRARIES} ${SWRESAMPLE_LIBRARIES})
+    set (FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${SWRESAMPLE_LIBRARIES})
 else()
     if( AVRESAMPLE_FOUND )
-        set(SOUND_INPUT_LIBRARY ${FFMPEG_LIBRARIES} ${AVRESAMPLE_LIBRARIES})
+        set (FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${AVRESAMPLE_LIBRARIES})
     else()
         message(FATAL_ERROR "Install either libswresample (FFmpeg) or libavresample (Libav).")
     endif()
 endif()
 
+set(SOUND_INPUT_LIBRARY ${FFMPEG_LIBRARIES})
+
 # TinyXML
 option(USE_SYSTEM_TINYXML "Use system TinyXML library instead of internal." OFF)
 if(USE_SYSTEM_TINYXML)

extern/ogre-ffmpeg-videoplayer/CMakeLists.txt

@@ -11,29 +11,9 @@ set(OGRE_FFMPEG_VIDEOPLAYER_SOURCE_FILES
     audiofactory.hpp
 )
 
-# Find FFMPEG
-set(FFmpeg_FIND_COMPONENTS AVCODEC AVFORMAT AVUTIL SWSCALE SWRESAMPLE AVRESAMPLE)
-unset(FFMPEG_LIBRARIES CACHE)
-find_package(FFmpeg)
-if ( NOT AVCODEC_FOUND OR NOT AVFORMAT_FOUND OR NOT AVUTIL_FOUND OR NOT SWSCALE_FOUND )
-    message(FATAL_ERROR "FFmpeg component required, but not found!")
-endif()
-set(VIDEO_FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${SWSCALE_LIBRARIES})
-if( SWRESAMPLE_FOUND )
-    add_definitions(-DHAVE_LIBSWRESAMPLE)
-    set(VIDEO_FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${SWRESAMPLE_LIBRARIES})
-else()
-    if( AVRESAMPLE_FOUND )
-        set(VIDEO_FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${AVRESAMPLE_LIBRARIES})
-    else()
-        message(FATAL_ERROR "Install either libswresample (FFmpeg) or libavresample (Libav).")
-    endif()
-endif()
-include_directories(${FFMPEG_INCLUDE_DIRS})
-
 # Find Boost
 
 add_library(${OGRE_FFMPEG_VIDEOPLAYER_LIBRARY} STATIC ${OGRE_FFMPEG_VIDEOPLAYER_SOURCE_FILES})
-target_link_libraries(${OGRE_FFMPEG_VIDEOPLAYER_LIBRARY} ${VIDEO_FFMPEG_LIBRARIES} ${Boost_THREAD_LIBRARY})
+target_link_libraries(${OGRE_FFMPEG_VIDEOPLAYER_LIBRARY} ${FFMPEG_LIBRARIES} ${Boost_THREAD_LIBRARY})
 
 link_directories(${CMAKE_CURRENT_BINARY_DIR})