obs-studio/cmake/Modules/FindPipeWire.cmake

# cmake-format: off
# .rst: FindPipeWire
# -------
#
# Try to find PipeWire on a Unix system.
#
# This will define the following variables:
#
# ``PIPEWIRE_FOUND`` True if (the requested version of) PipeWire is available
# ``PIPEWIRE_VERSION`` The version of PipeWire ``PIPEWIRE_LIBRARIES`` This can
# be passed to target_link_libraries() instead of the ``PipeWire::PipeWire``
# target ``PIPEWIRE_INCLUDE_DIRS`` This should be passed to
# target_include_directories() if the target is not used for linking
# ``PIPEWIRE_COMPILE_FLAGS`` This should be passed to target_compile_options()
# if the target is not used for linking
#
# If ``PIPEWIRE_FOUND`` is TRUE, it will also define the following imported
# target:
#
# ``PipeWire::PipeWire`` The PipeWire library
#
# In general we recommend using the imported target, as it is easier to use.
# Bear in mind, however, that if the target is in the link interface of an
# exported library, it must be made available by the package config file.

# =============================================================================
# Copyright 2014 Alex Merry <[email protected]> Copyright 2014 Martin Gräßlin
# <[email protected]> Copyright 2018-2020 Jan Grulich <[email protected]>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the copyright notice, this list
#    of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the copyright notice, this
#    list of conditions and the following disclaimer in the documentation and/or
#    other materials provided with the distribution.
# 3. The name of the author may not be used to endorse or promote products
#    derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# =============================================================================
# cmake-format: on

# Use pkg-config to get the directories and then use these values in the FIND_PATH() and FIND_LIBRARY() calls
find_package(PkgConfig QUIET)

pkg_search_module(PKG_PIPEWIRE QUIET libpipewire-0.3)
pkg_search_module(PKG_SPA QUIET libspa-0.2)

set(PIPEWIRE_COMPILE_FLAGS "${PKG_PIPEWIRE_CFLAGS}" "${PKG_SPA_CFLAGS}")
set(PIPEWIRE_VERSION "${PKG_PIPEWIRE_VERSION}")

find_path(
  PIPEWIRE_INCLUDE_DIRS
  NAMES pipewire/pipewire.h
  HINTS ${PKG_PIPEWIRE_INCLUDE_DIRS} ${PKG_PIPEWIRE_INCLUDE_DIRS}/pipewire-0.3)

find_path(
  SPA_INCLUDE_DIRS
  NAMES spa/param/props.h
  HINTS ${PKG_SPA_INCLUDE_DIRS} ${PKG_SPA_INCLUDE_DIRS}/spa-0.2)

find_library(
  PIPEWIRE_LIBRARIES
  NAMES pipewire-0.3
  HINTS ${PKG_PIPEWIRE_LIBRARY_DIRS})

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
  PipeWire
  FOUND_VAR PIPEWIRE_FOUND
  REQUIRED_VARS PIPEWIRE_LIBRARIES PIPEWIRE_INCLUDE_DIRS SPA_INCLUDE_DIRS
  VERSION_VAR PIPEWIRE_VERSION)

if(PIPEWIRE_FOUND AND NOT TARGET PipeWire::PipeWire)
  add_library(PipeWire::PipeWire UNKNOWN IMPORTED)
  set_target_properties(
    PipeWire::PipeWire
    PROPERTIES IMPORTED_LOCATION "${PIPEWIRE_LIBRARIES}"
               INTERFACE_COMPILE_OPTIONS "${PIPEWIRE_COMPILE_FLAGS}"
               INTERFACE_INCLUDE_DIRECTORIES "${PIPEWIRE_INCLUDE_DIRS};${SPA_INCLUDE_DIRS}")
endif()

mark_as_advanced(PIPEWIRE_LIBRARIES PIPEWIRE_INCLUDE_DIRS)

include(FeatureSummary)
set_package_properties(
  PipeWire PROPERTIES
  URL "https://www.pipewire.org"
  DESCRIPTION "PipeWire - multimedia processing")