# - Try to find FFmpeg

# Using Pkg-config if available for path

#

#  FFMPEG_FOUND        - all required ffmpeg components found on system

#  FFMPEG_INCLUDE_DIRS  - combined include directories

#  FFMPEG_LIBRARIES    - combined libraries to link

set(REQUIRED_AVCODEC_VERSION 0.8)

set(REQUIRED_AVCODEC_API_VERSION 53.25.0)

include(FindPkgConfig)

if (PKG_CONFIG_FOUND)

	pkg_check_modules(AVCODEC libavcodec)

	pkg_check_modules(AVUTIL libavutil)

	pkg_check_modules(AVRESAMPLE libavresample)

	pkg_check_modules(SWRESAMPLE libswresample)

endif(PKG_CONFIG_FOUND)

# avcodec

find_path(AVCODEC_INCLUDE_DIR libavcodec/avcodec.h PATHS ${AVCODEC_INCLUDE_DIRS})

find_library(AVCODEC_LIBRARY avcodec PATHS ${AVCODEC_LIBRARY_DIRS})

# avutil

find_path(AVUTIL_INCLUDE_DIR libavutil/avutil.h PATHS ${AVUTIL_INCLUDE_DIRS})

find_library(AVUTIL_LIBRARY avutil PATHS ${AVUTIL_LIBRARY_DIRS})

# swresample

find_path(SWRESAMPLE_INCLUDE_DIR libswresample/swresample.h PATHS ${SWRESAMPLE_INCLUDE_DIRS})

find_library(SWRESAMPLE_LIBRARY swresample PATHS ${SWRESAMPLE_LIBRARY_DIRS})

# avresample

find_path(AVRESAMPLE_INCLUDE_DIR libavresample/avresample.h PATHS ${AVRESAMPLE_INCLUDE_DIRS})

find_library(AVRESAMPLE_LIBRARY avresample PATHS ${AVRESAMPLE_LIBRARY_DIRS})

if (AVCODEC_INCLUDE_DIR AND AVCODEC_LIBRARY)

	set(AVCODEC_FOUND TRUE)

endif(AVCODEC_INCLUDE_DIR AND AVCODEC_LIBRARY)

if (AVUTIL_INCLUDE_DIR AND AVUTIL_LIBRARY)

	set(AVUTIL_FOUND TRUE)

endif(AVUTIL_INCLUDE_DIR AND AVUTIL_LIBRARY)

include(FindPackageHandleStandardArgs)

if (SWRESAMPLE_FOUND)

	FIND_PACKAGE_HANDLE_STANDARD_ARGS(FFmpeg DEFAULT_MSG AVUTIL_FOUND AVCODEC_FOUND SWRESAMPLE_FOUND)

else()

	FIND_PACKAGE_HANDLE_STANDARD_ARGS(FFmpeg DEFAULT_MSG AVUTIL_FOUND AVCODEC_FOUND AVRESAMPLE_FOUND)

endif()

if (AVCODEC_VERSION)

	if (${AVCODEC_VERSION} VERSION_LESS ${REQUIRED_AVCODEC_API_VERSION})

		message(FATAL_ERROR

			    "libavcodec version >= ${REQUIRED_AVCODEC_VERSION} (API >= ${REQUIRED_AVCODEC_API_VERSION}) is required")

	endif()

else(AVCODEC_VERSION)

	message("Note: To build libavcodec version >= ${REQUIRED_AVCODEC_VERSION} (API >= ${REQUIRED_AVCODEC_API_VERSION}) is required")

endif(AVCODEC_VERSION)

if (FFMPEG_FOUND)

	if (SWRESAMPLE_FOUND)

		set(FFMPEG_INCLUDE_DIRS ${AVCODEC_INCLUDE_DIR} ${AVUTIL_INCLUDE_DIR} ${SWRESAMPLE_INCLUDE_DIR})

		set(FFMPEG_LIBRARIES ${AVCODEC_LIBRARY} ${AVUTIL_LIBRARY} ${SWRESAMPLE_LIBRARY})

	elseif (AVRESAMPLE_FOUND)

		set(FFMPEG_INCLUDE_DIRS ${AVCODEC_INCLUDE_DIR} ${AVUTIL_INCLUDE_DIR} ${AVRESAMPLE_INCLUDE_DIR})

		set(FFMPEG_LIBRARIES ${AVCODEC_LIBRARY} ${AVUTIL_LIBRARY} ${AVRESAMPLE_LIBRARY})

	endif()

endif(FFMPEG_FOUND)

mark_as_advanced(FFMPEG_INCLUDE_DIRS FFMPEG_LIBRARIES)