FindPulseAudio.cmake

# Taken from: https://github.com/vasi/kdelibs/blob/master/cmake/modules/FindPulseAudio.cmake
# Try to find the PulseAudio library
#
# Once done this will define:
#
#  PULSEAUDIO_FOUND - system has the PulseAudio library
#  PULSEAUDIO_INCLUDE_DIR - the PulseAudio include directory
#  PULSEAUDIO_LIBRARY - the libraries needed to use PulseAudio
#  PULSEAUDIO_MAINLOOP_LIBRARY - the libraries needed to use PulsAudio Mainloop
#
# The minimum required version of PulseAudio can be specified using the
# standard syntax, e.g. find_package(PulseAudio 1.0)

# Copyright (c) 2008, Matthias Kretz, <kretz@kde.org>
# Copyright (c) 2009, Marcus Hufgard, <Marcus.Hufgard@hufgard.de>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.

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

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

if (NOT WIN32)
    find_package(PkgConfig)
    pkg_check_modules(PC_PULSEAUDIO QUIET libpulse>=${PulseAudio_FIND_VERSION})
    pkg_check_modules(PC_PULSEAUDIO_MAINLOOP QUIET libpulse-mainloop-glib)
endif (NOT WIN32)

find_path(PULSEAUDIO_INCLUDE_DIR pulse/pulseaudio.h
        HINTS
        ${PC_PULSEAUDIO_INCLUDEDIR}
        ${PC_PULSEAUDIO_INCLUDE_DIRS}
        )

find_library(PULSEAUDIO_LIBRARY 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_DIR AND NOT PULSEAUDIO_VERSION)

    # get PulseAudio's version from its version.h, and compare it with our minimum version
    file(STRINGS "${PULSEAUDIO_INCLUDE_DIR}/pulse/version.h" pulse_version_h
            REGEX ".*pa_get_headers_version\\(\\).*"
            )
    string(REGEX REPLACE ".*pa_get_headers_version\\(\\)\ \\(\"([0-9]+\\.[0-9]+\\.[0-9]+)[^\"]*\"\\).*" "\\1"
            _PULSEAUDIO_VERSION "${pulse_version_h}")

    set(PULSEAUDIO_VERSION "${_PULSEAUDIO_VERSION}" CACHE STRING "Version number of PulseAudio" FORCE)
endif (PULSEAUDIO_INCLUDE_DIR AND NOT PULSEAUDIO_VERSION)

# 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_LIBRARY PULSEAUDIO_INCLUDE_DIR
        VERSION_VAR PULSEAUDIO_VERSION)

mark_as_advanced(PULSEAUDIO_INCLUDE_DIR PULSEAUDIO_LIBRARY PULSEAUDIO_MAINLOOP_LIBRARY)