From 8ff9cbf776ccb6306a8a0699bc4c8f5a8af7f922 Mon Sep 17 00:00:00 2001
From: malc <malc@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Mon, 23 Jun 2008 18:33:30 +0000
Subject: [PATCH] Make mixer emulation a configure option (Jan Kiszka)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4783 c046a42c-6fe2-441c-8c8c-71466251a162
---
 audio/mixeng.c          |  2 --
 audio/mixeng_template.h | 10 +++++-----
 configure               |  9 +++++++++
 3 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/audio/mixeng.c b/audio/mixeng.c
index b668c524e7..5e0426cb6d 100644
--- a/audio/mixeng.c
+++ b/audio/mixeng.c
@@ -28,8 +28,6 @@
 #define AUDIO_CAP "mixeng"
 #include "audio_int.h"
 
-#define NOVOL
-
 /* 8 bit */
 #define ENDIAN_CONVERSION natural
 #define ENDIAN_CONVERT(v) (v)
diff --git a/audio/mixeng_template.h b/audio/mixeng_template.h
index d726441e2e..21eef58bf6 100644
--- a/audio/mixeng_template.h
+++ b/audio/mixeng_template.h
@@ -31,14 +31,14 @@
 #define HALF (IN_MAX >> 1)
 #endif
 
-#ifdef NOVOL
-#define VOL(a, b) a
-#else
+#ifdef CONFIG_MIXEMU
 #ifdef FLOAT_MIXENG
 #define VOL(a, b) ((a) * (b))
 #else
 #define VOL(a, b) ((a) * (b)) >> 32
 #endif
+#else
+#define VOL(a, b) a
 #endif
 
 #define ET glue (ENDIAN_CONVERSION, glue (_, IN_T))
@@ -113,7 +113,7 @@ static void glue (glue (conv_, ET), _to_stereo)
 {
     st_sample_t *out = dst;
     IN_T *in = (IN_T *) src;
-#ifndef NOVOL
+#ifdef CONFIG_MIXEMU
     if (vol->mute) {
         mixeng_clear (dst, samples);
         return;
@@ -133,7 +133,7 @@ static void glue (glue (conv_, ET), _to_mono)
 {
     st_sample_t *out = dst;
     IN_T *in = (IN_T *) src;
-#ifndef NOVOL
+#ifdef CONFIG_MIXEMU
     if (vol->mute) {
         mixeng_clear (dst, samples);
         return;
diff --git a/configure b/configure
index fb704bae42..efecd20c42 100755
--- a/configure
+++ b/configure
@@ -114,6 +114,7 @@ build_docs="no"
 uname_release=""
 curses="yes"
 nptl="yes"
+mixemu="no"
 
 # OS specific
 targetos=`uname -s`
@@ -337,6 +338,8 @@ for opt do
   ;;
   --disable-nptl) nptl="no"
   ;;
+  --enable-mixemu) mixemu="yes"
+  ;;
   *) echo "ERROR: unknown option $opt"; show_help="yes"
   ;;
   esac
@@ -428,6 +431,7 @@ echo "  --enable-alsa            enable ALSA audio driver"
 echo "  --enable-esd             enable EsoundD audio driver"
 echo "  --enable-fmod            enable FMOD audio driver"
 echo "  --enable-dsound          enable DirectSound audio driver"
+echo "  --enable-mixemu          enable mixer emulation"
 echo "  --disable-brlapi         disable BrlAPI"
 echo "  --disable-vnc-tls        disable TLS encryption for VNC server"
 echo "  --disable-curses         disable curses output"
@@ -839,6 +843,7 @@ echo "CoreAudio support $coreaudio"
 echo "ALSA support      $alsa"
 echo "EsounD support    $esd"
 echo "DSound support    $dsound"
+echo "Mixer emulation   $mixemu"
 if test "$fmod" = "yes"; then
     if test -z $fmod_lib || test -z $fmod_inc; then
         echo
@@ -1067,6 +1072,10 @@ if test "$dsound" = "yes" ; then
   echo "CONFIG_DSOUND=yes" >> $config_mak
   echo "#define CONFIG_DSOUND 1" >> $config_h
 fi
+if test "$mixemu" = "yes" ; then
+  echo "CONFIG_MIXEMU=yes" >> $config_mak
+  echo "#define CONFIG_MIXEMU 1" >> $config_h
+fi
 if test "$fmod" = "yes" ; then
   echo "CONFIG_FMOD=yes" >> $config_mak
   echo "CONFIG_FMOD_LIB=$fmod_lib" >> $config_mak