From a6cedc1a067cfdfb1ba44a8f4b98ea78ae3fe78f Mon Sep 17 00:00:00 2001
From: Jan Zerebecki <jan.wine@zerebecki.de>
Date: Sat, 25 Jul 2009 15:39:54 +0200
Subject: [PATCH] winealsa: Add option to disable mixer.

Enable by setting the registry key
HKCU\Software\Wine\Alsa Driver\DisableMixer to "Y".
---
 dlls/winealsa.drv/mixer.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/dlls/winealsa.drv/mixer.c b/dlls/winealsa.drv/mixer.c
index e5cd3477995..802ac4c83f2 100644
--- a/dlls/winealsa.drv/mixer.c
+++ b/dlls/winealsa.drv/mixer.c
@@ -42,6 +42,7 @@
 #include "windef.h"
 #include "winbase.h"
 #include "wingdi.h"
+#include "winreg.h"
 #include "winuser.h"
 #include "winnls.h"
 #include "mmddk.h"
@@ -52,6 +53,8 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(mixer);
 
+#define IS_OPTION_TRUE(ch) ((ch) == 'y' || (ch) == 'Y' || (ch) == 't' || (ch) == 'T' || (ch) == '1')
+
 #ifdef HAVE_ALSA
 
 #define	WINE_MIXER_MANUF_ID      0xAA
@@ -500,6 +503,21 @@ static void ALSA_MixerInit(void)
         /* Add master channel, uncounted channels and an extra for capture  */
         mixdev[mixnum].chans += !!mastelem + !!headelem + !!pcmelem + 1;
 
+        {
+            BYTE buffer[32];
+            DWORD size = sizeof(buffer);
+            HKEY hkey = 0;
+            /* @@ Wine registry key: HKCU\Software\Wine\Direct3D */
+            if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\Alsa Driver", &hkey)) {
+                if (!RegQueryValueExA( hkey, "DisableMixer", 0, NULL, buffer, &size)) {
+                    if ( IS_OPTION_TRUE( buffer[0] ) ) {
+                        WARN("Mixing disabled in registry!\n");
+                        goto close;
+                    }
+                }
+            }
+        }
+
         /* If there is only 'Capture' and 'Master', this device is not worth it */
         if (mixdev[mixnum].chans == 2)
         {
-- 
2.11.4.GIT