[vdr] DXR3 and WSS signalling (a bit off-topic, sorry)

[Seppo Ingalsuo <seppo.ingalsuo@iki.fi>]

Hi,

My Panasonic TV says now WIDE (actually LAAJA in Finnish...) and
switches in auto aspect mode to anamorphic 16:9 mode when running vdr
with this change em8300 modules.

--- adv717x.c	2003-04-28 20:05:11.000000000 +0300
+++ adv717x.c.orig	2003-04-28 20:04:29.000000000 +0300
@@ -154,9 +154,9 @@
 	0x00,   // Pedestal Control Register 1
 	0x00,   // Pedestal Control Register 2
 	0x00,   // Pedestal Control Register 3
-	0x80,	// CGMS_WSS Reg 0
+	0x00,	// CGMS_WSS Reg 0
 	0x00,	// CGMS_WSS Reg 1
-	0x07,	// CGMS_WSS Reg 2
+	0x00,	// CGMS_WSS Reg 2
 	0x00	// TeleText Control Register
 };

This aspect change is permanent so it is not usable as such. In addition
in only works with PAL mode and ADV7170 video encoder chipset. There are
also other chipsets in DXR3 type cards such as ADV7175 which doesn't
have this feature (guessed from em8300 source code). BT865 probably has
the WSS feature. There other aspect ratio settings, e.g. by setting WSS2
to 0x08 TV can be put to 4:3 mode and 0x0b should inform about 16:9
(zoom hint???) letterbox. There are also 14:9 and non center letterbox
stuff but they probably are not interesting. 

Do have ideas how this feature could be got into em8300 modules as
automatic depending on content aspect ratio and such way finally usable
to vdr's dxr3 plugin? 

BR,
Seppo

-- 
Seppo Ingalsuo - seppo.ingalsuo@iki.fi



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