dsound: Add a registry setting for hel buffer length.

dlls/dsound/dsound_main.c

@@ -53,6 +53,7 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(dsound);
 
+#define DS_HEL_BUFLEN 0x8000 /* HEL: The buffer length of the emulated buffer */
 #define DS_SND_QUEUE_MAX 10 /* max number of fragments to prebuffer, each fragment is approximately 10 ms long */
 
 DirectSoundDevice*	DSOUND_renderer[MAXWAVEDRIVERS];
@@ -87,6 +88,7 @@ HRESULT mmErr(UINT err)
 }
 
 int ds_emuldriver = 0;
+int ds_hel_buflen = DS_HEL_BUFLEN;
 int ds_snd_queue_max = DS_SND_QUEUE_MAX;
 int ds_hw_accel = DS_HW_ACCEL_FULL;
 int ds_default_playback = 0;
@@ -144,6 +146,9 @@ void setup_dsound_options(void)
     if (!get_config_key( hkey, appkey, "EmulDriver", buffer, MAX_PATH ))
         ds_emuldriver = strcmp(buffer, "N");
 
+    if (!get_config_key( hkey, appkey, "HelBuflen", buffer, MAX_PATH ))
+        ds_hel_buflen = atoi(buffer);
+
     if (!get_config_key( hkey, appkey, "SndQueueMax", buffer, MAX_PATH ))
         ds_snd_queue_max = atoi(buffer);
 
@@ -175,6 +180,8 @@ void setup_dsound_options(void)
 
     if (ds_emuldriver)
        WARN("ds_emuldriver = %d (default=0)\n",ds_emuldriver);
+    if (ds_hel_buflen != DS_HEL_BUFLEN)
+       WARN("ds_hel_buflen = %d (default=%d)\n",ds_hel_buflen ,DS_HEL_BUFLEN);
     if (ds_snd_queue_max != DS_SND_QUEUE_MAX)
        WARN("ds_snd_queue_max = %d (default=%d)\n",ds_snd_queue_max ,DS_SND_QUEUE_MAX);
     if (ds_hw_accel != DS_HW_ACCEL_FULL)

dlls/dsound/dsound_private.h

@@ -23,7 +23,6 @@
 #define DS_TIME_RES 2  /* Resolution of multimedia timer */
 #define DS_TIME_DEL 10  /* Delay of multimedia timer callback, and duration of HEL fragment */
 
-#define DS_HEL_BUFLEN 0x8000 /* HEL: The buffer length of the emulated buffer */
 #define DS_HEL_FRAGS 0x10 /* HEL only: number of waveOut fragments in primary buffer
 			 * (changing this won't help you) */
 
@@ -34,6 +33,7 @@
 #define DS_HW_ACCEL_EMULATION   3
 
 extern int ds_emuldriver;
+extern int ds_hel_buflen;
 extern int ds_snd_queue_max;
 extern int ds_hw_accel;
 extern int ds_default_playback;

dlls/dsound/primary.c

@@ -88,7 +88,7 @@ static HRESULT DSOUND_PrimaryOpen(DirectSoundDevice *device)
 
 		/* on original windows, the buffer it set to a fixed size, no matter what the settings are.
 		   on windows this size is always fixed (tested on win-xp) */
-		buflen = DS_HEL_BUFLEN;
+		buflen = ds_hel_buflen;
 
 		TRACE("desired buflen=%d, old buffer=%p\n", buflen, device->buffer);