#
# Find the native FFMPEG includes and library
#
# This module defines
# FFMPEG_INCLUDE_DIR, where to find avcodec.h, avformat.h ...
# FFMPEG_LIBRARIES, the libraries to link against to use FFMPEG.
# FFMPEG_FOUND, If false, do not try to use FFMPEG.

# also defined, but not for general use are
# FFMPEG_avformat_LIBRARY and FFMPEG_avcodec_LIBRARY, where to find the FFMPEG library.
# This is useful to do it this way so that we can always add more libraries
# if needed to FFMPEG_LIBRARIES if ffmpeg ever changes...

# if ffmpeg headers are all in one directory
FIND_PATH(FFMPEG_INCLUDE_DIR avformat.h
       PATHS
       $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"
)

# if ffmpeg headers are seperated to each of libavformat, libavcodec etc..
IF( NOT FFMPEG_INCLUDE_DIR )
  FIND_PATH(FFMPEG_INCLUDE_DIR libavformat/avformat.h
       PATHS
       $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_INCLUDE_DIR )

# we want the -I include line to use the parent directory of ffmpeg as
# ffmpeg uses relative includes such as <ffmpeg/avformat.h> or <libavcodec/avformat.h>
get_filename_component(FFMPEG_INCLUDE_DIR ${FFMPEG_INCLUDE_DIR} ABSOLUTE)

FIND_LIBRARY(FFMPEG_avformat_LIBRARY avformat
  /usr/local/lib
  /usr/lib
)

FIND_LIBRARY(FFMPEG_avcodec_LIBRARY avcodec
  /usr/local/lib
  /usr/lib
)

FIND_LIBRARY(FFMPEG_avutil_LIBRARY avutil
  /usr/local/lib
  /usr/lib
)

FIND_LIBRARY(FFMPEG_vorbis_LIBRARY vorbis
  /usr/local/lib
  /usr/lib
)

FIND_LIBRARY(FFMPEG_dc1394_LIBRARY dc1394_control
  /usr/local/lib
  /usr/lib
)

FIND_LIBRARY(FFMPEG_vorbisenc_LIBRARY vorbisenc
  /usr/local/lib
  /usr/lib
)

FIND_LIBRARY(FFMPEG_theora_LIBRARY theora
  /usr/local/lib
  /usr/lib
)

FIND_LIBRARY(FFMPEG_dts_LIBRARY dts
  /usr/local/lib
  /usr/lib
)

FIND_LIBRARY(FFMPEG_gsm_LIBRARY gsm
  /usr/local/lib
  /usr/lib
)

FIND_LIBRARY(FFMPEG_swscale_LIBRARY swscale
  /usr/local/lib
  /usr/lib
)

FIND_LIBRARY(FFMPEG_z_LIBRARY z
  /usr/local/lib
  /usr/lib
)

SET(FFMPEG_LIBRARIES)
IF(FFMPEG_INCLUDE_DIR)
  IF(FFMPEG_avformat_LIBRARY)
    IF(FFMPEG_avcodec_LIBRARY)
      IF(FFMPEG_avutil_LIBRARY)
        SET( FFMPEG_FOUND "YES" )
        SET( FFMPEG_BASIC_LIBRARIES 
          ${FFMPEG_avcodec_LIBRARY} 
          ${FFMPEG_avformat_LIBRARY}
          ${FFMPEG_avutil_LIBRARY} 
          )

        # swscale is always a part of newer ffmpeg distros
        IF(FFMPEG_swscale_LIBRARY)
          LIST(APPEND FFMPEG_BASIC_LIBRARIES ${FFMPEG_swscale_LIBRARY})
        ENDIF(FFMPEG_swscale_LIBRARY)

        SET(FFMPEG_LIBRARIES ${FFMPEG_BASIC_LIBRARIES})

        IF(FFMPEG_vorbis_LIBRARY)
          LIST(APPEND FFMPEG_LIBRARIES ${FFMPEG_vorbis_LIBRARY})
        ENDIF(FFMPEG_vorbis_LIBRARY)

        IF(FFMPEG_dc1394_LIBRARY)
          LIST(APPEND FFMPEG_LIBRARIES ${FFMPEG_dc1394_LIBRARY})
        ENDIF(FFMPEG_dc1394_LIBRARY)

        IF(FFMPEG_vorbisenc_LIBRARY)
          LIST(APPEND FFMPEG_LIBRARIES ${FFMPEG_vorbisenc_LIBRARY})
        ENDIF(FFMPEG_vorbisenc_LIBRARY)

        IF(FFMPEG_theora_LIBRARY)
          LIST(APPEND FFMPEG_LIBRARIES ${FFMPEG_theora_LIBRARY})
        ENDIF(FFMPEG_theora_LIBRARY)

        IF(FFMPEG_dts_LIBRARY)
          LIST(APPEND FFMPEG_LIBRARIES ${FFMPEG_dts_LIBRARY})
        ENDIF(FFMPEG_dts_LIBRARY)

        IF(FFMPEG_gsm_LIBRARY)
          LIST(APPEND FFMPEG_LIBRARIES ${FFMPEG_gsm_LIBRARY})
        ENDIF(FFMPEG_gsm_LIBRARY)

        IF(FFMPEG_z_LIBRARY)
          LIST(APPEND FFMPEG_LIBRARIES ${FFMPEG_z_LIBRARY})
        ENDIF(FFMPEG_z_LIBRARY)

        SET(FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} CACHE INTERNAL "All presently found FFMPEG libraries.")

      ENDIF(FFMPEG_avutil_LIBRARY)
    ENDIF(FFMPEG_avcodec_LIBRARY)
  ENDIF(FFMPEG_avformat_LIBRARY)
ENDIF(FFMPEG_INCLUDE_DIR)

MARK_AS_ADVANCED(
  FFMPEG_INCLUDE_DIR
  FFMPEG_avformat_LIBRARY
  FFMPEG_avcodec_LIBRARY
  FFMPEG_avutil_LIBRARY
  FFMPEG_vorbis_LIBRARY
  FFMPEG_dc1394_LIBRARY
  FFMPEG_vorbisenc_LIBRARY
  FFMPEG_theora_LIBRARY
  FFMPEG_dts_LIBRARY
  FFMPEG_gsm_LIBRARY
  FFMPEG_swscale_LIBRARY
  FFMPEG_z_LIBRARY
  )