On Wed, 23 Mar 2005 21:52:37 +0000, John Harvey wrote:
> Chris
> I think that vsync wants removing whatever. Since X is currently
> doing 2 calls for large screen updates it means that a full screen X
> update takes 2 vsync's which is bad.
>
> I think in time it should possibly be an option to the prep frame call to
> request a vsync'ed transfer, but for now I think this patch is correct.
For quite a while now, I've been using a patched x11 driver that does
only one call, even for full screen without any problems (ivtv 0.3.x)
John, any ideas about YUV decoder support (xvideo)?
Jelle.
--- ivtv/ivtvhw.c 2004-12-15 16:04:27.000000000 -0500
+++ ivtv.patched/ivtvhw.c 2005-02-05 20:46:26.000000000 -0500
@@ -750,8 +754,8 @@
unsigned long totalData =
endOffset - startOffset;
-
- if (totalData > 64 *1024 *4)
+#if 0
+ if (totalData > 64 *1024 *4) /* otherwise we get "Count 1441792 Offset
-59392 is greater than buffer" from the driver */
{
/* This is a bigger lump so send in 2 bits */
totalData /= 2;
@@ -759,15 +763,20 @@
secondOffset = endOffset - totalData;
} else
{
- totalData = (totalData + 65535) & ~65535;
+#endif
+ if (totalData <= 64 *1024 *21) /* otherwise we get "Count 1441792
Offset -59392 is greater than buffer" from the driver during playback */
+ {
+ totalData = (totalData + 65535) & ~65535;
+ }
if ((startOffset + totalData) > totalScreenSize)
{
startOffset -= (startOffset + totalData) - totalScreenSize;
}
+#if 0
}
-
+#endif
args.source = ((char *)ptr+startOffset);
args.dest_offset = startOffset;
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