dep: Add libsamplerate

dep/libsamplerate/cmake/FindSndFile.cmake

@@ -0,0 +1,57 @@
+# Variables defined:
+#  SNDFILE_FOUND
+#  SNDFILE_INCLUDE_DIR
+#  SNDFILE_LIBRARY
+#
+# Environment variables used:
+#  SNDFILE_ROOT
+
+if(SndFile_INCLUDE_DIR)
+  # Already in cache, be silent
+  set(SndFile_FIND_QUIETLY TRUE)
+endif(SndFile_INCLUDE_DIR)
+
+find_package(PkgConfig QUIET)
+pkg_check_modules(PC_SndFile QUIET sndfile)
+
+set(SndFile_VERSION ${PC_SndFile_VERSION})
+
+find_package(Vorbis COMPONENTS Enc QUIET)
+find_package(FLAC QUIET)
+find_package(Opus QUIET)
+
+find_path(SndFile_INCLUDE_DIR sndfile.h
+  HINTS
+    ${PC_SndFile_INCLUDEDIR}
+    ${PC_SndFile_INCLUDE_DIRS}
+    ${SndFile_ROOT})
+
+find_library(SndFile_LIBRARY NAMES sndfile
+  HINTS
+    ${PC_SndFile_LIBDIR}
+    ${PC_SndFile_LIBRARY_DIRS}
+    ${SndFile_ROOT})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(SndFile
+  REQUIRED_VARS
+    SndFile_LIBRARY
+    SndFile_INCLUDE_DIR
+  VERSION_VAR
+    SndFile_VERSION)
+
+if(SndFile_FOUND)
+
+  set(SndFile_LIBRARIES ${SndFile_LIBRARY} ${Vorbis_Enc_LIBRARIES} ${FLAC_LIBRARIES} ${OPUS_LIBRARIES})
+  set(SndFile_INCLUDE_DIRS ${SndFile_INCLUDE_DIR} ${Vorbis_Enc_INCLUDE_DIRS} ${FLAC_INCLUDE_DIRS} ${OPUS_INCLUDE_DIRS})
+  
+  if(NOT TARGET SndFile::sndfile)
+    add_library(SndFile::sndfile UNKNOWN IMPORTED)
+    set_target_properties(SndFile::sndfile PROPERTIES
+      INTERFACE_INCLUDE_DIRECTORIES "${SndFile_INCLUDE_DIR}"
+      IMPORTED_LOCATION "${SndFile_LIBRARY}"
+      INTERFACE_LINK_LIBRARIES "Vorbis::vorbisenc;Opus::opus;FLAC::FLAC")
+  endif()
+endif()
+
+mark_as_advanced(SndFile_LIBRARY SndFile_INCLUDE_DIR)