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# OpenClonk, http://www.openclonk.org
#
# Copyright (c) 2009-2016, The OpenClonk Team and contributors
#
# Distributed under the terms of the ISC license; see accompanying file
# "COPYING" for details.
#
# "Clonk" is a registered trademark of Matthes Bender, used with permission.
# See accompanying file "TRADEMARK" for details.
#
# To redistribute this file separately, substitute the full license texts
# for the above references.
# This module chooses an audio provider for use in OpenClonk.
macro(__FINDAUDIO_FINDOPENAL)
set(HAVE_ALEXT FALSE)
find_package(PkgConfig QUIET)
if(PKG_CONFIG_FOUND AND NOT(APPLE))
pkg_check_modules(OpenAL "openal>=1.13")
# OpenAL pkg-config data before 1.15 doesn't have .../AL in the include
# path. But we don't want to have to specify <AL/al.h> because some
# systems use <OpenAL/al.h>. So let's see if we find al.h in the list
# of directories that pkg_check_modules returned, and if not, add it to
# the include path.
if (OpenAL_FOUND)
# OpenAL pkg-config data always includes alext.h
set(HAVE_ALEXT TRUE)
find_path(__findaudio_al_h NAMES al.h PATHS ${OpenAL_INCLUDE_DIRS})
if (NOT __findaudio_al_h)
find_path(__findaudio_al_h NAMES al.h PATHS ${OpenAL_INCLUDE_DIRS} PATH_SUFFIXES OpenAL AL)
if (__findaudio_al_h)
list(APPEND __findaudio_al_h ${OpenAL_INCLUDE_DIRS})
set(OpenAL_INCLUDE_DIRS "${__findaudio_al_h}" CACHE INTERNAL "")
endif()
endif()
endif()
pkg_check_modules(Alut "freealut>=1.1.0")
pkg_check_modules(OggVorbis "vorbisfile>=1.3.2" "vorbis>=1.3.2" "ogg>=1.2.2")
else()
if(MSVC OR APPLE)
# We need OpenAL preferably with alext.h.
find_path(OpenALExt_INCLUDE_DIRS alext.h PATH_SUFFIXES include/AL include/OpenAL include OpenAL)
if(OpenALExt_INCLUDE_DIRS)
set(HAVE_ALEXT TRUE)
set(OpenAL_INCLUDE_DIRS ${OpenALExt_INCLUDE_DIRS})
else()
set(HAVE_ALEXT FALSE)
# Maybe only al.h can be found without alext.h?
find_path(OpenAL_INCLUDE_DIRS al.h PATH_SUFFIXES include/AL include/OpenAL include OpenAL)
endif()
find_path(Vorbis_INCLUDE_DIRS vorbis/codec.h vorbis/vorbisfile.h PATH_SUFFIXES include)
find_library(Ogg_LIBRARY NAMES libogg_static libogg ogg)
find_library(Vorbis_LIBRARY NAMES libvorbis_static libvorbis vorbis)
find_library(Vorbisfile_LIBRARY NAMES libvorbisfile_static libvorbisfile vorbisfile)
if(OpenAL_INCLUDE_DIRS)
set(OpenAL_FOUND TRUE)
endif()
if(Vorbis_INCLUDE_DIRS AND Ogg_LIBRARY AND Vorbis_LIBRARY AND Vorbisfile_LIBRARY)
set(OggVorbis_FOUND TRUE)
set(OggVorbis_LIBRARIES ${Vorbisfile_LIBRARY} ${Vorbis_LIBRARY} ${Ogg_LIBRARY})
set(OggVorbis_INCLUDE_DIRS(${Vorbis_INCLUDE_DIRS}))
endif()
find_path(Alut_INCLUDE_DIRS alut.h PATH_SUFFIXES include/AL include/OpenAL include)
find_library(Alut_LIBRARY NAMES alut_static alut)
if (MSVC)
if(${FIND_LIBRARY_USE_LIB64_PATHS})
find_library(OpenAL_LIBRARIES NAMES OpenAL64)
else()
find_library(OpenAL_LIBRARIES NAMES OpenAL32)
endif()
if(NOT OpenAL_LIBRARIES)
set(OpenAL_FOUND FALSE)
endif()
endif()
if(Alut_INCLUDE_DIRS AND Alut_LIBRARY)
set(Alut_FOUND TRUE)
set(Alut_LIBRARIES ${Alut_LIBRARY})
endif()
endif()
endif()
endmacro()
if(Audio_TK)
# Already chosen, don't do anything
else()
# Test for OpenAL
__FINDAUDIO_FINDOPENAL()
find_package(SDL2Mixer)
if(OpenAL_FOUND AND Alut_FOUND AND OggVorbis_FOUND)
# Prefer OpenAL
set(Audio_TK "OpenAL")
if (NOT HAVE_ALEXT)
message(STATUS "Warning: Found OpenAL but no extensions (alext.h). Sound modifiers will be disabled.")
endif()
elseif(SDL2Mixer_FOUND)
set(Audio_TK "SDL_Mixer")
endif()
endif()
# Search for the libraries again. If the provider was selected automatically, this will be
# answered from cache; otherwise (because the user manually selected a provider) it will
# make sure the provider is available.
if(Audio_TK STREQUAL "OpenAL")
__FINDAUDIO_FINDOPENAL()
if(OpenAL_FOUND AND (APPLE OR Alut_FOUND) AND OggVorbis_FOUND)
set(Audio_FOUND TRUE)
set(Audio_LIBRARIES ${OpenAL_LIBRARIES} ${OggVorbis_LIBRARIES})
set(Audio_INCLUDE_DIRS ${OpenAL_INCLUDE_DIRS} ${OggVorbis_INCLUDE_DIRS})
set(Audio_LIBRARIES ${Audio_LIBRARIES} ${Alut_LIBRARIES})
set(Audio_INCLUDE_DIRS ${Audio_INCLUDE_DIRS} ${Alut_INCLUDE_DIRS})
endif()
elseif(Audio_TK STREQUAL "SDL_Mixer")
find_package(SDL2Mixer)
if(SDL2Mixer_FOUND)
set(Audio_FOUND TRUE)
set(Audio_LIBRARIES ${SDL2Mixer_LIBRARIES})
set(Audio_INCLUDE_DIRS ${SDL2Mixer_INCLUDE_DIRS})
endif()
elseif(Audio_TK STREQUAL "none")
set(Audio_FOUND TRUE)
set(Audio_LIBRARIES "")
set(Audio_INCLUDE_DIRS "")
endif()
if(Audio_FOUND)
string(TOUPPER "${Audio_TK}" Audio_TK_UPPER)
if(NOT Audio_FIND_QUIETLY)
message(STATUS "Using Audio toolkit: ${Audio_TK}")
endif()
elseif(Audio_TK)
message(FATAL_ERROR "User-requested audio provider not available.")
else()
set(Audio_FOUND FALSE)
set(Audio_TK "none")
string(TOUPPER "${Audio_TK}" Audio_TK_UPPER)
set(Audio_LIBRARIES "")
set(Audio_INCLUDE_DIRS "")
if(Audio_FIND_REQUIRED)
message(FATAL_ERROR "No audio provider was found")
else()
message(STATUS "Not enabling audio output.")
endif()
endif()
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