configure.ac: add option to disable the DSD decoders

Allow building a smaller MPD binary for people who don't need DSD.

Makefile.am

@@ -476,12 +476,6 @@ endif
 libdecoder_plugins_a_SOURCES = \
 	src/decoder/PcmDecoderPlugin.cxx \
 	src/decoder/PcmDecoderPlugin.hxx \
-	src/decoder/DsdiffDecoderPlugin.cxx \
-	src/decoder/DsdiffDecoderPlugin.hxx \
-	src/decoder/DsfDecoderPlugin.cxx \
-	src/decoder/DsfDecoderPlugin.hxx \
-	src/decoder/DsdLib.cxx \
-	src/decoder/DsdLib.hxx \
 	src/DecoderBuffer.cxx src/DecoderBuffer.hxx \
 	src/DecoderPlugin.cxx \
 	src/DecoderList.cxx src/DecoderList.hxx
@@ -525,6 +519,16 @@ DECODER_LIBS = \
 
 DECODER_SRC =
 
+if ENABLE_DSD
+libdecoder_plugins_a_SOURCES += \
+	src/decoder/DsdiffDecoderPlugin.cxx \
+	src/decoder/DsdiffDecoderPlugin.hxx \
+	src/decoder/DsfDecoderPlugin.cxx \
+	src/decoder/DsfDecoderPlugin.hxx \
+	src/decoder/DsdLib.cxx \
+	src/decoder/DsdLib.hxx
+endif
+
 if HAVE_MAD
 libdecoder_plugins_a_SOURCES += \
 	src/decoder/MadDecoderPlugin.cxx \
@@ -1559,6 +1563,8 @@ test_test_queue_priority_LDADD = \
 	libutil.a \
 	$(CPPUNIT_LIBS)
 
+if ENABLE_DSD
+
 noinst_PROGRAMS += src/pcm/dsd2pcm/dsd2pcm
 
 src_pcm_dsd2pcm_dsd2pcm_SOURCES = \
@@ -1571,6 +1577,8 @@ src_pcm_dsd2pcm_dsd2pcm_LDADD = libutil.a
 
 endif
 
+endif
+
 
 #
 # Documentation

configure.ac

@@ -214,6 +214,11 @@ AC_ARG_ENABLE(documentation,
 		[build documentation (default: disable)]),,
 	[enable_documentation=no])
 
+AC_ARG_ENABLE(dsd,
+	AS_HELP_STRING([--enable-dsd],
+		[enable DSD decoder (default: enable)]),,
+	[enable_dsd=yes])
+
 AC_ARG_ENABLE(ffmpeg,
 	AS_HELP_STRING([--enable-ffmpeg],
 		[enable FFMPEG support]),,
@@ -846,6 +851,14 @@ if test x$enable_audiofile = xyes; then
 	AC_DEFINE(HAVE_AUDIOFILE, 1, [Define for audiofile support])
 fi
 
+dnl ----------------------------------- DSD -----------------------------------
+
+if test x$enable_dsd = xyes; then
+	AC_DEFINE(HAVE_DSD, 1, [Define for the DSD decoder])
+fi
+
+AM_CONDITIONAL(ENABLE_DSD, test x$enable_dsd = xyes)
+
 dnl ----------------------------------- FAAD ----------------------------------
 AM_PATH_FAAD()
 

src/DecoderList.cxx

@@ -73,8 +73,10 @@ const struct DecoderPlugin *const decoder_plugins[] = {
 #ifdef HAVE_AUDIOFILE
 	&audiofile_decoder_plugin,
 #endif
+#ifdef ENABLE_DSD
 	&dsdiff_decoder_plugin,
 	&dsf_decoder_plugin,
+#endif
 #ifdef HAVE_FAAD
 	&faad_decoder_plugin,
 #endif