Add DSF and DSDIFF/DFF support

CMakeLists.txt

@@ -170,6 +170,10 @@ if (TAGLIB_FOUND AND USE_SYSTEM_TAGLIB)
   set(CMAKE_REQUIRED_LIBRARIES "${TAGLIB_LIBRARIES}")
   set(CMAKE_REQUIRED_INCLUDES)
   set(CMAKE_REQUIRED_LIBRARIES)
+  find_path(HAVE_TAGLIB_DSFFILE_H taglib/dsffile.h)
+  if(HAVE_TAGLIB_DSFFILE_H)
+    set(HAVE_TAGLIB_DSFFILE ON)
+  endif(HAVE_TAGLIB_DSFFILE_H)
 else()
   message(STATUS "Using builtin taglib library")
   set(TAGLIB_INCLUDE_DIRS "${CMAKE_BINARY_DIR}/3rdparty/taglib/headers/taglib/;${CMAKE_BINARY_DIR}/3rdparty/taglib/headers/")
@@ -177,6 +181,7 @@ else()
   set(TAGLIB_LIBRARIES tag)
   add_subdirectory(3rdparty/utf8-cpp)
   add_subdirectory(3rdparty/taglib)
+  set(HAVE_TAGLIB_DSFFILE ON)
 endif()
 
 # LASTFM