--- swfdec-0.6.6/swfdec-gtk/swfdec_playback_oss.c.orig	2008-07-03 18:13:00.000000000 +0200
+++ swfdec-0.6.6/swfdec-gtk/swfdec_playback_oss.c	2008-07-03 18:27:38.000000000 +0200
@@ -59,6 +59,10 @@
 /* Size of one of our audio samples, in bytes */
 #define SAMPLESIZE	2
 #define CHANNELS	2
+/* Fragment size selector for 4096 bytes */
+#define FRAGSIZE_SEL	12
+#define FRAGSIZE	(1 << FRAGSIZE_SEL)
+#define MAX_FRAGMENTS	4
 
 /*** STREAMS ***/
 
@@ -113,9 +117,9 @@
   GIOChannel *channel;
   Stream *stream;
   guint rate;
-  int dsp_fd, ret, format, channels, fragsize;
+  int dsp_fd, ret, format, channels, mmmmssss;
 
-  dsp_fd = open("/dev/dsp", O_WRONLY);
+  dsp_fd = open("/dev/dsp", O_WRONLY | O_NONBLOCK);
   if (dsp_fd == -1) {
     g_printerr ("Failed to open /dev/dsp\n");
     return;
@@ -145,9 +149,13 @@
     return;
   }
 
-  ret = ioctl(dsp_fd, SNDCTL_DSP_GETBLKSIZE, &fragsize);
+  /* We used to query the fragment size by SNDCTL_DSP_GETBLKSIZE ioctl,
+   * but it added latency.
+   * See SNDCTL_DSP_SETFRAGMENT page in oss reference for details. */
+  mmmmssss = (MAX_FRAGMENTS << 16) | (FRAGSIZE_SEL);
+  ret = ioctl(dsp_fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss);
   if (ret == -1) {
-    g_printerr ("Failed to get fragment size\n");
+    g_printerr ("Failed to set fragment size\n");
     close(dsp_fd);
     return;
   }
@@ -156,7 +164,7 @@
   stream->sound = sound;
   stream->audio = g_object_ref (audio);
   stream->dsp_fd = dsp_fd;
-  stream->fragsize = fragsize;
+  stream->fragsize = FRAGSIZE;
   sound->streams = g_list_prepend (sound->streams, stream);
 
   channel = g_io_channel_unix_new (stream->dsp_fd);