[DSOUND] add primary buffer change tests

[Robert Reif]

Add tests to figure out whether Windows can change the
primary buffer capabilities after setting the buffer format.

Based on a patch by Alex Villací­s Lasso:
http://www.winehq.org/pipermail/wine-patches/2005-August/019901.html

We need to verify Windows behavior to determine if we
need to fix the ALSA driver or DirectSound.  DirectSound
assumes the buffer size will not change but ALSA makes
no such guarantee.
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Index: dlls/dsound/tests/ds3d.c
===================================================================
RCS file: /home/wine/wine/dlls/dsound/tests/ds3d.c,v
retrieving revision 1.31
diff -p -u -r1.31 ds3d.c
--- dlls/dsound/tests/ds3d.c	6 Jan 2006 12:18:52 -0000	1.31
+++ dlls/dsound/tests/ds3d.c	11 Jan 2006 01:59:16 -0000
@@ -362,6 +362,7 @@ void test_buffer(LPDIRECTSOUND dso, LPDI
     ok(status==0,"status=0x%lx instead of 0\n",status);
 
     if (is_primary) {
+        DSBCAPS new_dsbcaps;
         /* We must call SetCooperativeLevel to be allowed to call SetFormat */
         /* DSOUND: Setting DirectSound cooperative level to DSSCL_PRIORITY */
         rc=IDirectSound_SetCooperativeLevel(dso,get_hwnd(),DSSCL_PRIORITY);
@@ -400,6 +401,30 @@ void test_buffer(LPDIRECTSOUND dso, LPDI
                   wfx.nChannels,wfx.nAvgBytesPerSec,wfx.nBlockAlign);
         }
 
+        ZeroMemory(&new_dsbcaps, sizeof(new_dsbcaps));
+        new_dsbcaps.dwSize = sizeof(new_dsbcaps);
+        rc=IDirectSoundBuffer_GetCaps(*dsbo,&new_dsbcaps);
+        ok(rc==DS_OK,"IDirectSoundBuffer_GetCaps() failed: %s\n",
+           DXGetErrorString8(rc));
+        if (rc==DS_OK && winetest_debug > 1) {
+            trace("    new Caps: flags=0x%08lx size=%ld\n",new_dsbcaps.dwFlags,
+                  new_dsbcaps.dwBufferBytes);
+        }
+                                                                                
+        /* Check for primary buffer size change */
+        if (new_dsbcaps.dwBufferBytes != dsbcaps.dwBufferBytes) {
+            trace("    buffer size changed after SetFormat() - "
+                  "previous size was %lu, current size is %lu\n",
+                  dsbcaps.dwBufferBytes, new_dsbcaps.dwBufferBytes);
+        }
+
+        /* Check for primary buffer flags change */
+        if (new_dsbcaps.dwFlags != dsbcaps.dwFlags) {
+            trace("    flags changed after SetFormat() - "
+                  "previous flags were %08lx, current flags are %08lx\n",
+                  dsbcaps.dwFlags, new_dsbcaps.dwFlags);
+        }
+
         /* Set the CooperativeLevel back to normal */
         /* DSOUND: Setting DirectSound cooperative level to DSSCL_NORMAL */
         rc=IDirectSound_SetCooperativeLevel(dso,get_hwnd(),DSSCL_NORMAL);
Index: dlls/dsound/tests/ds3d8.c
===================================================================
RCS file: /home/wine/wine/dlls/dsound/tests/ds3d8.c,v
retrieving revision 1.23
diff -p -u -r1.23 ds3d8.c
--- dlls/dsound/tests/ds3d8.c	6 Jan 2006 12:18:52 -0000	1.23
+++ dlls/dsound/tests/ds3d8.c	11 Jan 2006 01:59:17 -0000
@@ -254,6 +254,7 @@ void test_buffer8(LPDIRECTSOUND8 dso, LP
     ok(status==0,"status=0x%lx instead of 0\n",status);
 
     if (is_primary) {
+        DSBCAPS new_dsbcaps;
         /* We must call SetCooperativeLevel to be allowed to call SetFormat */
         /* DSOUND: Setting DirectSound cooperative level to DSSCL_PRIORITY */
         rc=IDirectSound8_SetCooperativeLevel(dso,get_hwnd(),DSSCL_PRIORITY);
@@ -292,6 +293,30 @@ void test_buffer8(LPDIRECTSOUND8 dso, LP
                   wfx.nChannels,wfx.nAvgBytesPerSec,wfx.nBlockAlign);
         }
 
+        ZeroMemory(&new_dsbcaps, sizeof(new_dsbcaps));
+        new_dsbcaps.dwSize = sizeof(new_dsbcaps);
+        rc=IDirectSoundBuffer_GetCaps(*dsbo,&new_dsbcaps);
+        ok(rc==DS_OK,"IDirectSoundBuffer_GetCaps() failed: %s\n",
+           DXGetErrorString8(rc));
+        if (rc==DS_OK && winetest_debug > 1) {
+            trace("    new Caps: flags=0x%08lx size=%ld\n",new_dsbcaps.dwFlags,
+                  new_dsbcaps.dwBufferBytes);
+        }
+
+        /* Check for primary buffer size change */
+        if (new_dsbcaps.dwBufferBytes != dsbcaps.dwBufferBytes) {
+            trace("    buffer size changed after SetFormat() - "
+                  "previous size was %lu, current size is %lu\n",
+                  dsbcaps.dwBufferBytes, new_dsbcaps.dwBufferBytes);
+        }
+
+        /* Check for primary buffer flags change */
+        if (new_dsbcaps.dwFlags != dsbcaps.dwFlags) {
+            trace("    flags changed after SetFormat() - "
+                  "previous flags were %08lx, current flags are %08lx\n",
+                  dsbcaps.dwFlags, new_dsbcaps.dwFlags);
+        }
+
         /* Set the CooperativeLevel back to normal */
         /* DSOUND: Setting DirectSound cooperative level to DSSCL_NORMAL */
         rc=IDirectSound8_SetCooperativeLevel(dso,get_hwnd(),DSSCL_NORMAL);