When we get down to the last fragment or two in our output to the DSP,

we should use the SND_DSP_POST ioctl to let the sound card know to flush those fragments. This allows us to precisely know when the buffer is empty, and fixes another set of winmm tests.

When we get down to the last fragment or two in our output to the DSP,
920ef0fb · Jeremy White · Alexandre Julliard · 1b685779 · 920ef0fb
Commit 920ef0fb authored Feb 23, 2005 by Jeremy White Committed by Alexandre Julliard Feb 23, 2005
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audio.c dlls/winmm/wineoss/audio.c +4 -3

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--- a/dlls/winmm/wineoss/audio.c
+++ b/dlls/winmm/wineoss/audio.c
@@ -1665,12 +1665,13 @@ static DWORD wodPlayer_FeedDSP(WINE_WAVEOUT* wwo)

    /* input queue empty and output buffer with less than one fragment to play
     * actually some cards do not play the fragment before the last if this one is partially feed
-     * so we need to test for full the availability of 2 fragments
+     * so we need to test for full the availability of 2 fragments ; the DSP_POST ioctl
+     * will let the card know to play out the rest of the fragments
     */
    if (!wwo->lpPlayPtr && wwo->dwBufferSize < availInQ + 2 * wwo->dwFragmentSize &&
        !wwo->bNeedPost) {
-	TRACE("Run out of wavehdr:s...\n");
-        return INFINITE;
+	TRACE("Run out of wavehdr's, requesting a POST...\n");
+        wwo->bNeedPost = TRUE;
    }

    /* no more room... no need to try to feed */