add --disable-audio configure option

configure.ac

@@ -27,6 +27,7 @@ AM_CONFIG_HEADER(config.h)
 MPD_CFLAGS="-Wall"
 MPD_LIBS=""
 
+AC_ARG_ENABLE(audio,[  --disable-audio    disable support for playing],,enable_ao=yes)
 AC_ARG_ENABLE(iconv,[  --disable-iconv     disable iconv support],,enable_iconv=yes)
 AC_ARG_ENABLE(ipv6,[  --disable-ipv6     disable IPv6 support],,enable_ipv6=yes)
 AC_ARG_ENABLE(alsa,[  --disable-alsa     disable Alsa Mixer support],,enable_alsa=yes)
@@ -91,7 +92,11 @@ AP_maGiC_VALUE
 )
 fi
 
-XIPH_PATH_AO(MPD_LIBS="$MPD_LIBS $AO_LIBS" MPD_CFLAGS="$MPD_CFLAGS $AO_CFLAGS",AC_MSG_ERROR(Must have libao installed!!!))
+if test x$enable_ao = xyes; then
+	XIPH_PATH_AO(MPD_LIBS="$MPD_LIBS $AO_LIBS" MPD_CFLAGS="$MPD_CFLAGS $AO_CFLAGS",AC_MSG_ERROR(Must have libao installed!!!))
+	AC_DEFINE(HAVE_AUDIO, 1, [Define to play audio])
+fi
+
 AC_CHECK_HEADER(sys/soundcard.h,enable_oss=yes,[AC_MSG_WARN(Soundcard headers not found -- disabling OSS mixer);enable_oss=no;AC_DEFINE(NO_OSS_MIXER,1,[Define to disable OSS mixer support])])
 
 if test x$enable_alsa = xyes; then
@@ -502,6 +507,12 @@ fi
 
 echo ""
 echo "Audio Format Support:"
+if test x$enable_ao = xyes; then
+	echo "Playing audio .................enabled"
+else
+	echo "Playing audio .................disabled"
+fi
+
 if test x$enable_id3 = xyes; then
 	echo "ID3 tag support ...............enabled"
 	if test x$use_mpd_id3tag = xyes; then

src/audio.c

@@ -25,6 +25,9 @@
 #include <assert.h>
 #include <signal.h>
 
+#ifdef HAVE_AUDIO
+#include <ao/ao.h>
+
 int audio_write_size;
 
 int audio_ao_driver_id;
@@ -32,8 +35,10 @@ ao_option * audio_ao_options;
 
 AudioFormat audio_format;
 ao_device * audio_device = NULL;
+#endif
 
 void initAudioDriver() {
+#ifdef HAVE_AUDIO
 	ao_info * ai;
 	char * dup;
 	char * stk1;
@@ -107,15 +112,19 @@ void initAudioDriver() {
 		}
 	}
 	free(dup);
+#endif
 }
 
 void finishAudioDriver() {
+#ifdef HAVE_AUDIO
 	ao_free_options(audio_ao_options);
 
 	ao_shutdown();
+#endif
 }
 
 int isCurrentAudioFormat(AudioFormat * audioFormat) {
+#ifdef HAVE_AUDIO
 	if(!audio_device || !audioFormat) return 0;
 
 	if(audio_format.bits!=audioFormat->bits || 
@@ -124,11 +133,12 @@ int isCurrentAudioFormat(AudioFormat * audioFormat) {
 	{
 		return 0;
 	}
-
+#endif
 	return 1;
 }
 
 int initAudio(AudioFormat * audioFormat) {
+#ifdef HAVE_AUDIO
 	ao_sample_format format;
 
 	if(audio_device && !isCurrentAudioFormat(audioFormat)) {
@@ -154,12 +164,13 @@ int initAudio(AudioFormat * audioFormat) {
 
 		if(audio_device==NULL) return -1;
 	}
-
+#endif
 	return 0;
 }
 
 
 int playAudio(char * playChunk, int size) {
+#ifdef HAVE_AUDIO
 	int send;
 
 	if(audio_device==NULL) {
@@ -181,19 +192,23 @@ int playAudio(char * playChunk, int size) {
 		size-=send;
 	}
 
+#endif
 	return 0;
 }
 
 void finishAudio() {
+#ifdef HAVE_AUDIO
 	if(audio_device) {
 		blockSignals();
 		ao_close(audio_device);
 		audio_device = NULL;
 		unblockSignals();
 	}
+#endif
 }
 
 void audioError() {
+#ifdef HAVE_AUDIO
 	if(errno==AO_ENOTLIVE) {
 		ERROR("not a live ao device\n");
 	}
@@ -203,4 +218,5 @@ void audioError() {
 	else if(errno==AO_EBADOPTION) {
 		ERROR("bad driver option\n");
 	}
+#endif
 }

src/audio.h

@@ -24,7 +24,6 @@
 #include "mpd_types.h"
 
 #include <stdio.h>
-#include <ao/ao.h>
 
 #define AUDIO_AO_DRIVER_DEFAULT	"default"
 
@@ -34,9 +33,6 @@ typedef struct _AudioFormat {
 	mpd_sint8 bits;
 } AudioFormat;
 
-extern int audio_ao_driver_id;
-extern ao_option * audio_ao_options;
-
 void initAudioDriver();
 
 void finishAudioDriver();

src/flac_decode.c

@@ -45,7 +45,6 @@ typedef struct {
 /* this code is based on flac123, from flac-tools */
 
 int flacSendChunk(FlacData * data);
-void flacPlayfile(const char * file, Buffer * cb, ao_sample_format * format);
 void flacError(const FLAC__FileDecoder *, FLAC__StreamDecoderErrorStatus, void *);
 void flacPrintErroredState(FLAC__FileDecoderState state, char * file);
 void flacMetadata(const FLAC__FileDecoder *, const FLAC__StreamMetadata *, void *);

src/mp3_decode.c

@@ -42,6 +42,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <errno.h>
 
 #define FRAMES_CUSHION		2000