+# Locate ffmpeg
+# This module defines
+# FFMPEG_LIBRARIES
+# FFMPEG_FOUND, if false, do not try to link to ffmpeg
+# FFMPEG_INCLUDE_DIR, where to find the headers
+#
+# $FFMPEG_DIR is an environment variable that would
+# correspond to the ./configure --prefix=$FFMPEG_DIR
+#
+# Created by Robert Osfield.
+
+
+#In ffmpeg code, old version use "#include <header.h>" and newer use "#include <libname/header.h>"
+#In OSG ffmpeg plugin, we use "#include <header.h>" for compatibility with old version of ffmpeg
+
+#We have to search the path which contain the header.h (usefull for old version)
+#and search the path which contain the libname/header.h (usefull for new version)
+
+#Then we need to include ${FFMPEG_libname_INCLUDE_DIRS} (in old version case, use by ffmpeg header and osg plugin code)
+# (in new version case, use by ffmpeg header)
+#and ${FFMPEG_libname_INCLUDE_DIRS/libname} (in new version case, use by osg plugin code)
+
+
+# Macro to find header and lib directories
+# example: FFMPEG_FIND(AVFORMAT avformat avformat.h)
+MACRO(FFMPEG_FIND varname shortname headername)
+ # old version of ffmpeg put header in $prefix/include/[ffmpeg]
+ # so try to find header in include directory
+ FIND_PATH(FFMPEG_${varname}_INCLUDE_DIRS ${headername}
+ PATHS
+ ${FFMPEG_ROOT}/include
+ $ENV{FFMPEG_DIR}/include
+ $ENV{OSGDIR}/include
+ $ENV{OSG_ROOT}/include
+ ~/Library/Frameworks
+ /Library/Frameworks
+ /usr/local/include
+ /usr/include
+ /sw/include # Fink
+ /opt/local/include # DarwinPorts
+ /opt/csw/include # Blastwave
+ /opt/include
+ /usr/freeware/include
+ PATH_SUFFIXES ffmpeg
+ DOC "Location of FFMPEG Headers"
+ )
+
+ # newer version of ffmpeg put header in $prefix/include/[ffmpeg/]lib${shortname}
+ # so try to find lib${shortname}/header in include directory
+ IF(NOT FFMPEG_${varname}_INCLUDE_DIRS)
+ FIND_PATH(FFMPEG_${varname}_INCLUDE_DIRS lib${shortname}/${headername}
+ ${FFMPEG_ROOT}/include
+ $ENV{FFMPEG_DIR}/include
+ $ENV{OSGDIR}/include
+ $ENV{OSG_ROOT}/include
+ ~/Library/Frameworks
+ /Library/Frameworks
+ /usr/local/include
+ /usr/include/
+ /sw/include # Fink
+ /opt/local/include # DarwinPorts
+ /opt/csw/include # Blastwave
+ /opt/include
+ /usr/freeware/include
+ PATH_SUFFIXES ffmpeg
+ DOC "Location of FFMPEG Headers"
+ )
+ ENDIF(NOT FFMPEG_${varname}_INCLUDE_DIRS)
+
+ FIND_LIBRARY(FFMPEG_${varname}_LIBRARIES
+ NAMES ${shortname}
+ PATHS
+ ${FFMPEG_ROOT}/lib
+ $ENV{FFMPEG_DIR}/lib
+ $ENV{OSGDIR}/lib
+ $ENV{OSG_ROOT}/lib
+ ~/Library/Frameworks
+ /Library/Frameworks
+ /usr/local/lib
+ /usr/local/lib64
+ /usr/lib
+ /usr/lib64
+ /sw/lib
+ /opt/local/lib
+ /opt/csw/lib
+ /opt/lib
+ /usr/freeware/lib64
+ DOC "Location of FFMPEG Libraries"
+ )
+
+ IF (FFMPEG_${varname}_LIBRARIES AND FFMPEG_${varname}_INCLUDE_DIRS)
+ SET(FFMPEG_${varname}_FOUND 1)
+ ENDIF(FFMPEG_${varname}_LIBRARIES AND FFMPEG_${varname}_INCLUDE_DIRS)
+
+ENDMACRO(FFMPEG_FIND)
+
+SET(FFMPEG_ROOT "$ENV{FFMPEG_DIR}" CACHE PATH "Location of FFMPEG")
+
+FFMPEG_FIND(LIBAVFORMAT avformat avformat.h)
+FFMPEG_FIND(LIBAVDEVICE avdevice avdevice.h)
+FFMPEG_FIND(LIBAVCODEC avcodec avcodec.h)
+FFMPEG_FIND(LIBAVUTIL avutil avutil.h)
+FFMPEG_FIND(LIBSWSCALE swscale swscale.h) # not sure about the header to look for here.
+
+SET(FFMPEG_FOUND "NO")
+# Note we don't check FFMPEG_LIBSWSCALE_FOUND here, it's optional.
+IF (FFMPEG_LIBAVFORMAT_FOUND AND FFMPEG_LIBAVDEVICE_FOUND AND FFMPEG_LIBAVCODEC_FOUND AND FFMPEG_LIBAVUTIL_FOUND)
+
+ SET(FFMPEG_FOUND "YES")
+
+ SET(FFMPEG_INCLUDE_DIRS ${FFMPEG_LIBAVFORMAT_INCLUDE_DIRS})
+
+ SET(FFMPEG_LIBRARY_DIRS ${FFMPEG_LIBAVFORMAT_LIBRARY_DIRS})
+
+ # Note we don't add FFMPEG_LIBSWSCALE_LIBRARIES here, it will be added if found later.
+ SET(FFMPEG_LIBRARIES
+ ${FFMPEG_LIBAVFORMAT_LIBRARIES}
+ ${FFMPEG_LIBAVDEVICE_LIBRARIES}
+ ${FFMPEG_LIBAVCODEC_LIBRARIES}
+ ${FFMPEG_LIBAVUTIL_LIBRARIES})
+
+ELSE (FFMPEG_LIBAVFORMAT_FOUND AND FFMPEG_LIBAVDEVICE_FOUND AND FFMPEG_LIBAVCODEC_FOUND AND FFMPEG_LIBAVUTIL_FOUND)
+
+# MESSAGE(STATUS "Could not find FFMPEG")
+
+ENDIF(FFMPEG_LIBAVFORMAT_FOUND AND FFMPEG_LIBAVDEVICE_FOUND AND FFMPEG_LIBAVCODEC_FOUND AND FFMPEG_LIBAVUTIL_FOUND)