Fix the check for SNDCTL_DSP_GETCAPS so that it is compliant with the

dlls/winmm/wineoss/audio.c

@@ -869,7 +869,7 @@ static BOOL OSS_WaveInInit(OSS_DEVICE* ossdev)
     ossdev->dsc_caps.dwFormats = 0x00000000;
     ossdev->dsc_caps.dwChannels = 1;
 
-    /* See the comment in OSS_WaveOutInit */
+    /* See the comment in OSS_WaveOutInit for the loop order */
     for (f=0;f<2;f++) {
         arg=win_std_oss_fmts[f];
         rc=ioctl(ossdev->fd, SNDCTL_DSP_SAMPLESIZE, &arg);
@@ -933,17 +933,31 @@ static void OSS_WaveFullDuplexInit(OSS_DEVICE* ossdev)
     int caps;
     TRACE("(%p) %s\n", ossdev, ossdev->dev_name);
 
-    if (OSS_OpenDevice(ossdev, O_RDWR, NULL, 0,-1,-1,-1) != 0)
+    /* The OSS documentation says we must call SNDCTL_SETDUPLEX
+     * *before* checking for SNDCTL_DSP_GETCAPS otherwise we may
+     * get the wrong result. This ioctl must even be done before
+     * setting the fragment size so that only OSS_RawOpenDevice is
+     * in a position to do it. So we set full_duplex speculatively
+     * and adjust right after.
+     */
+    ossdev->full_duplex=1;
+    rc=OSS_OpenDevice(ossdev, O_RDWR, NULL, 0,-1,-1,-1);
+    ossdev->full_duplex=0;
+    if (rc != 0)
         return;
 
     ioctl(ossdev->fd, SNDCTL_DSP_RESET, 0);
-
     TRACE("%s\n", ossdev->ds_desc.szDesc);
 
+
+    if (ioctl(ossdev->fd, SNDCTL_DSP_GETCAPS, &caps) == 0)
+        ossdev->full_duplex = (caps & DSP_CAP_DUPLEX);
+
     if (WINE_TRACE_ON(wave))
+    {
         OSS_Info(ossdev->fd);
 
-    /* See the comment in OSS_WaveOutInit */
+        /* See the comment in OSS_WaveOutInit for the loop order */
         for (f=0;f<2;f++) {
             arg=win_std_oss_fmts[f];
             rc=ioctl(ossdev->fd, SNDCTL_DSP_SAMPLESIZE, &arg);
@@ -969,10 +983,7 @@ static void OSS_WaveFullDuplexInit(OSS_DEVICE* ossdev)
                 }
             }
         }
-
-    if (ioctl(ossdev->fd, SNDCTL_DSP_GETCAPS, &caps) == 0)
-        ossdev->full_duplex = (caps & DSP_CAP_DUPLEX);
-
+    }
     OSS_CloseDevice(ossdev);
 }