wasapi: sleep for half a period as hinted in MSDN

diff --git a/modules/audio_output/wasapi.c b/modules/audio_output/wasapi.c
index 734962b03ee58c164c17016ed78e2432cf4b82d0..243971e726ee9177a3f1f25bb74e962ab149a1ec 100644 (file)
--- a/modules/audio_output/wasapi.c
+++ b/modules/audio_output/wasapi.c
@@ -180,8 +180,7 @@ static HRESULT Play(aout_stream_t *s, block_t *block)
             break; /* done */
 
         /* Out of buffer space, sleep */
-        msleep(AOUT_MIN_PREPARE_TIME
-             + block->i_nb_samples * CLOCK_FREQ / sys->rate);
+        msleep(sys->frames * (CLOCK_FREQ / 2) / sys->rate);
     }
     IAudioRenderClient_Release(render);
 out: