# SPDX-FileCopyrightText: 2008 Matthias Kretz <kretz@kde.org>
# SPDX-FileCopyrightText: 2009 Marcus Hufgard <Marcus.Hufgard@hufgard.de>
#
# SPDX-License-Identifier: BSD-3-Clause

#[=======================================================================[.rst:
FindPulseAudio
--------------

Try to locate the PulseAudio library.
If found, this will define the following variables:

``PulseAudio_FOUND``
     True if the system has the PulseAudio library of at least
     the minimum version specified by either the version parameter
     to find_package() or the variable PulseAudio_MINIMUM_VERSION
``PulseAudio_INCLUDE_DIRS``
     The PulseAudio include directory
``PulseAudio_LIBRARIES``
     The PulseAudio libraries for linking
``PulseAudio_MAINLOOP_LIBRARY``
     The libraries needed to use PulseAudio Mainloop
``PulseAudio_VERSION``
     The version of PulseAudio that was found
``PulseAudio_INCLUDE_DIR``
    Deprecated, use ``PulseAudio_INCLUDE_DIRS``
``PulseAudio_LIBRARY``
    Deprecated, use ``PulseAudio_LIBRARIES``

If ``PulseAudio_FOUND`` is TRUE, it will also define the following
imported target:

``PulseAudio::PulseAudio``
    The PulseAudio library

Since 5.41.0.
#]=======================================================================]

cmake_policy(VERSION 3.16)

# Support PulseAudio_MINIMUM_VERSION for compatibility:
if(NOT PulseAudio_FIND_VERSION)
  set(PulseAudio_FIND_VERSION "${PulseAudio_MINIMUM_VERSION}")
endif()

# the minimum version of PulseAudio we require
if(NOT PulseAudio_FIND_VERSION)
  set(PulseAudio_FIND_VERSION "0.9.9")
endif()

find_package(PkgConfig QUIET)
pkg_check_modules(PC_PulseAudio QUIET libpulse>=${PulseAudio_FIND_VERSION})
pkg_check_modules(PC_PulseAudio_MAINLOOP QUIET libpulse-mainloop-glib)

find_path(PulseAudio_INCLUDE_DIRS pulse/pulseaudio.h
   HINTS
   ${PC_PulseAudio_INCLUDEDIR}
   ${PC_PulseAudio_INCLUDE_DIRS}
   )

find_library(PulseAudio_LIBRARIES NAMES pulse libpulse
   HINTS
   ${PC_PulseAudio_LIBDIR}
   ${PC_PulseAudio_LIBRARY_DIRS}
   )

find_library(PulseAudio_MAINLOOP_LIBRARY NAMES pulse-mainloop pulse-mainloop-glib libpulse-mainloop-glib
   HINTS
   ${PC_PulseAudio_LIBDIR}
   ${PC_PulseAudio_LIBRARY_DIRS}
   )

# Store the version number in the cache, so we don't have to search every time again:
if (PulseAudio_INCLUDE_DIRS AND NOT PulseAudio_VERSION)

   # get PulseAudio's version from its version.h
   file(STRINGS "${PulseAudio_INCLUDE_DIRS}/pulse/version.h" pulse_version_h
        REGEX ".*pa_get_headers_version\\(\\).*")
   string(REGEX REPLACE ".*pa_get_headers_version\\(\\)\ \\(\"([0-9]+\\.[0-9]+\\.[0-9]+)[^\"]*\"\\).*" "\\1"
                         _PulseAudio_VERSION "${pulse_version_h}")

   set(PulseAudio_VERSION "${_PulseAudio_VERSION}" CACHE STRING "Version number of PulseAudio" FORCE)
endif()

# Use the new extended syntax of find_package_handle_standard_args(), which also handles version checking:
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(PulseAudio REQUIRED_VARS PulseAudio_LIBRARIES PulseAudio_INCLUDE_DIRS
                                             VERSION_VAR PulseAudio_VERSION)

# Deprecated synonyms
set(PULSEAUDIO_INCLUDE_DIR "${PulseAudio_INCLUDE_DIRS}")
set(PULSEAUDIO_LIBRARY "${PulseAudio_LIBRARIES}")
set(PULSEAUDIO_MAINLOOP_LIBRARY "${PulseAudio_MAINLOOP_LIBRARY}")
set(PULSEAUDIO_FOUND "${PulseAudio_FOUND}")

if(PulseAudio_FOUND AND NOT TARGET PulseAudio::PulseAudio)
  add_library(PulseAudio::PulseAudio UNKNOWN IMPORTED)
  set_target_properties(PulseAudio::PulseAudio PROPERTIES
                        IMPORTED_LOCATION "${PulseAudio_LIBRARIES}"
			INTERFACE_INCLUDE_DIRECTORIES "${PulseAudio_INCLUDE_DIRS}")
endif()

mark_as_advanced(PulseAudio_INCLUDE_DIRS PULSEAUDIO_INCLUDE_DIR
                 PulseAudio_LIBRARIES PULSEAUDIO_LIBRARY
		 PulseAudio_MAINLOOP_LIBRARY PULSEAUDIO_MAINLOOP_LIBRARY)

include(FeatureSummary)
set_package_properties(PulseAudio PROPERTIES
  URL "https://www.freedesktop.org/wiki/Software/PulseAudio"
  DESCRIPTION "Sound server, for sound stream routing and mixing")
