cmake: Add module to find libspeexdsp

cmake/Modules/FindLibspeexdsp.cmake

@@ -0,0 +1,68 @@
+# Once done these will be defined:
+#
+#  LIBSPEEXDSP_FOUND
+#  LIBSPEEXDSP_INCLUDE_DIRS
+#  LIBSPEEXDSP_LIBRARIES
+#
+# For use in OBS:
+#
+#  SPEEXDSP_INCLUDE_DIR
+
+find_package(PkgConfig QUIET)
+if (PKG_CONFIG_FOUND)
+	pkg_check_modules(_SPEEXDSP QUIET speexdsp libspeexdsp)
+endif()
+
+if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+	set(_lib_suffix 64)
+else()
+	set(_lib_suffix 32)
+endif()
+
+find_path(SPEEXDSP_INCLUDE_DIR
+	NAMES speex/speex_preprocess.h
+	HINTS
+		ENV speexPath${_lib_suffix}
+		ENV speexPath
+		ENV DepsPath${_lib_suffix}
+		ENV DepsPath
+		${speexPath${_lib_suffix}}
+		${speexPath}
+		${DepsPath${_lib_suffix}}
+		${DepsPath}
+		${_SPEEXDSP_INCLUDE_DIRS}
+	PATHS
+		/usr/include /usr/local/include /opt/local/include /sw/include
+	PATH_SUFFIXES
+		include)
+
+find_library(SPEEXDSP_LIB
+	NAMES ${_SPEEXDSP_LIBRARIES} speexdsp libspeexdsp
+	HINTS
+		ENV speexPath${_lib_suffix}
+		ENV speexPath
+		ENV DepsPath${_lib_suffix}
+		ENV DepsPath
+		${speexPath${_lib_suffix}}
+		${speexPath}
+		${DepsPath${_lib_suffix}}
+		${DepsPath}
+		${_SPEEXDSP_LIBRARY_DIRS}
+	PATHS
+		/usr/lib /usr/local/lib /opt/local/lib /sw/lib
+	PATH_SUFFIXES
+		lib${_lib_suffix} lib
+		libs${_lib_suffix} libs
+		bin${_lib_suffix} bin
+		../lib${_lib_suffix} ../lib
+		../libs${_lib_suffix} ../libs
+		../bin${_lib_suffix} ../bin)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Libspeexdsp DEFAULT_MSG SPEEXDSP_LIB SPEEXDSP_INCLUDE_DIR)
+mark_as_advanced(SPEEXDSP_INCLUDE_DIR SPEEXDSP_LIB)
+
+if(LIBSPEEXDSP_FOUND)
+	set(LIBSPEEXDSP_INCLUDE_DIRS ${SPEEXDSP_INCLUDE_DIR})
+	set(LIBSPEEXDSP_LIBRARIES ${SPEEXDSP_LIB})
+endif()