audioresample: Only pull in liboil if its actualy used.

Liboil still has quite significant startup overhead especialy on embedded
platforms. In audioresample it was only used for the profiling timer.

configure.ac

@@ -313,6 +313,7 @@ case $ac_cv_audioresample_format in
     AC_DEFINE(AUDIORESAMPLE_FORMAT_AUTO,1,[The implementation that should be used for integer audio resampling witll be benchmarked at runtime])
     AC_SUBST(AUDIORESAMPLE_FORMAT_AUTO)
 esac
+AM_CONDITIONAL(AUDIORESAMPLE_NEEDS_LIBOIL, test "$ac_cv_audioresample_format" = "auto")
 
 dnl *** plug-ins to include ***
 

gst/audioresample/Makefile.am

@@ -1,5 +1,13 @@
 plugin_LTLIBRARIES = libgstaudioresample.la
 
+if AUDIORESAMPLE_NEEDS_LIBOIL
+COND_LIBOIL_CFLAGS=$(LIBOIL_CFLAGS)
+COND_LIBOIL_LIBS=$(LIBOIL_LIBS)
+else
+COND_LIBOIL_CFLAGS=
+COND_LIBOIL_LIBS=
+endif
+
 libgstaudioresample_la_SOURCES = \
 	gstaudioresample.c \
 	speex_resampler_int.c \
@@ -10,13 +18,13 @@ libgstaudioresample_la_CFLAGS = \
 	$(GST_PLUGINS_BASE_CFLAGS) \
 	$(GST_BASE_CFLAGS) \
 	$(GST_CFLAGS) \
-	$(LIBOIL_CFLAGS)
+	$(COND_LIBOIL_CFLAGS)
 
 libgstaudioresample_la_LIBADD = \
 	$(GST_PLUGINS_BASE_LIBS) \
 	$(GST_BASE_LIBS) \
 	$(GST_LIBS) \
-	$(LIBOIL_LIBS) \
+	$(COND_LIBOIL_LIBS) \
 	$(LIBM)
 
 libgstaudioresample_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)

gst/audioresample/gstaudioresample.c

@@ -49,9 +49,11 @@
 #include <gst/audio/audio.h>
 #include <gst/base/gstbasetransform.h>
 
+#if defined AUDIORESAMPLE_FORMAT_AUTO
 #define OIL_ENABLE_UNSTABLE_API
 #include <liboil/liboilprofile.h>
 #include <liboil/liboil.h>
+#endif
 
 GST_DEBUG_CATEGORY (audio_resample_debug);
 #define GST_CAT_DEFAULT audio_resample_debug
@@ -1392,10 +1394,9 @@ plugin_init (GstPlugin * plugin)
 {
   GST_DEBUG_CATEGORY_INIT (audio_resample_debug, "audioresample", 0,
       "audio resampling element");
-
+#if defined AUDIORESAMPLE_FORMAT_AUTO
   oil_init ();
 
-#if defined AUDIORESAMPLE_FORMAT_AUTO
   if (!_benchmark_integer_resampling ())
     return FALSE;
 #endif