WSS reloaded
|
View:
New views
6 Messages
—
Rating Filter:
Alert me
|
 |
WSS reloaded
by Nicolas Boullis
::
Rate this Message:
Hi,
I've tried to implement some support for WSS in my "em8300-scale-n-crop" repository. I tried it with no success, but I guess my good old 4:3 CRT TV set does not support WSS... Could anyone with the corresponding hardware give it a try? To give it a try, clone my http://freehg.org/u/nboullis/em8300-scale-n-crop/ repository, build the modules and load them. (Ensure that the good adv717x module gets loaded.) Then echo the desired WSS value (14-bit, 7 for 16:9, 8 for full 4:3) to /sys/class/em8300/em8300-0/device/encoder/wss . Any negative value will disable WSS. Note that it will trigger the flickering Ville mentionned. I have some idea how to fix it, but I'd rather first be sure that it works as is. Cheers, Nicolas ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Dxr3-devel mailing list Dxr3-devel@... https://lists.sourceforge.net/lists/listinfo/dxr3-devel |
|
|
Re: WSS reloaded
by Jan Willies
::
Rate this Message:
Nicolas Boullis schrieb:
> I've tried to implement some support for WSS in my "em8300-scale-n-crop" > repository. > I tried it with no success, but I guess my good old 4:3 CRT TV set does > not support WSS... > > Could anyone with the corresponding hardware give it a try? My TV is 20+ years old but hey, who knows... :) > To give it a try, clone my > http://freehg.org/u/nboullis/em8300-scale-n-crop/ repository, build the > modules and load them. (Ensure that the good adv717x module gets > loaded.) They are, modinfo shows hg-e75e100313b8. > > Then echo the desired WSS value (14-bit, 7 for 16:9, 8 for full 4:3) to > /sys/class/em8300/em8300-0/device/encoder/wss . Any negative value will > disable WSS. [root@server ~]# ll /sys/class/em8300/em8300-0/device/encoder lrwxrwxrwx 1 root root 0 24. Apr 14:43 /sys/class/em8300/em8300-0/device/encoder -> ../../../../class/i2c-adapter/i2c-1/1-006a [root@server ~]# ll /sys/class/em8300/em8300-0/device/encoder/ insgesamt 0 lrwxrwxrwx 1 root root 0 24. Apr 14:44 bus -> ../../../../bus/i2c lrwxrwxrwx 1 root root 0 24. Apr 14:44 driver -> ../../../../bus/i2c/drivers/adv717x -r--r--r-- 1 root root 4,0K 24. Apr 14:44 modalias -r--r--r-- 1 root root 4,0K 24. Apr 14:44 name drwxr-xr-x 2 root root 0 24. Apr 14:44 power lrwxrwxrwx 1 root root 0 24. Apr 14:44 subsystem -> ../../../../bus/i2c -rw-r--r-- 1 root root 4,0K 24. Apr 14:44 uevent There's no /sys/class/em8300/em8300-0/device/encoder/wss on my system. - Jan ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Dxr3-devel mailing list Dxr3-devel@... https://lists.sourceforge.net/lists/listinfo/dxr3-devel |
|
|
Re: WSS reloaded
by Jan Willies
::
Rate this Message:
Am Donnerstag, den 24.04.2008, 14:49 +0200 schrieb Jan Willies:
> Nicolas Boullis schrieb: > > I've tried to implement some support for WSS in my "em8300-scale-n-crop" > > repository. > > I tried it with no success, but I guess my good old 4:3 CRT TV set does > > not support WSS... > > > > Could anyone with the corresponding hardware give it a try? > My TV is 20+ years old but hey, who knows... :) [...] > There's no /sys/class/em8300/em8300-0/device/encoder/wss on my system. It seems to work though. Quite cool, although the VDR-OSD looks a bit weird on 16:9 TV stations. Hopefully the next dxr3-plugin resolves that issue. Sometimes I get crashes though: vdr: [10131] dxr3: cSPUEncoder::Flush: OSD data size: 5483 vdr: [10131] dxr3: cSPUEncoder::Flush: OSD data size: 5483 em8300_video.c: Video Fifo timeout vdr: [10142] dxr3: resuscitation: device failure or user initiated reset em8300.o: FIFO sync timeout during sync em8300_video.o: Video sync rdptr is stuck at 0x000327be, wrptr 0x000320f2, left -1740 em8300_video.o: Video sync timeout em8300.o: FIFO sync timeout during sync - Jan ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Dxr3-devel mailing list Dxr3-devel@... https://lists.sourceforge.net/lists/listinfo/dxr3-devel |
|
|
Re: WSS reloaded
by Nicolas Boullis
::
Rate this Message:
Hi,
On Thu, Apr 24, 2008 at 02:49:32PM +0200, Jan Willies wrote: > > There's no /sys/class/em8300/em8300-0/device/encoder/wss on my system. Sorry, I forgot to mention the hardware restrictions. Only cards with an ADV7170 encoder are supported. Cards with an ADV7175A encoder (like yours) can't be supported because the encoder chip does not support WSS. As for cards with a BT865 encoder, that chip was supposed to support WSS, but I think I read it was broken. Cheers, Nicolas ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Dxr3-devel mailing list Dxr3-devel@... https://lists.sourceforge.net/lists/listinfo/dxr3-devel |
|
|
Re: WSS reloaded
by Nicolas Boullis
::
Rate this Message:
Hi,
On Thu, Apr 24, 2008 at 05:43:29PM +0200, Jan Willies wrote: > > It seems to work though. Quite cool, although the VDR-OSD looks a bit > weird on 16:9 TV stations. Hopefully the next dxr3-plugin resolves that > issue. It does not work, this is only the result of my "scale-n-crop" work... Natively, the EM8300 chip is able to compress the image vertically to display a 16:9 stream on a 4:3 TV set. I think this is very restrictive, so I decided to do that work to add the ability to compress the image horizontally (to display a 4:3 stream on a 16:9 TV set), and also the ability to crop the image (especially useful when black borders are added around a 16:9 video to form a 4:3 stream, or around a 4:3 video to make a 16:9 stream). While the "native" compression only compresses the video and leaves the SPU untouched (VDR's OSD uses SPU), my code also affects the SPU. Hence, you got the SPU compressed, which makes it quite ugly. I don't think it is possible for vdr's dxr3 plugin to work aroud this. It's even worse when the image is cropped, since OSD gets cropped as well. But there, I think it should be possible to work around that issue in the plugin. I think the point behind WSS is to avoid performing any scaling or croping on the em8300 chip, which would mean a better image quality. Note that WSS is not the only way to switch a TV set between 4:3 and 16:9 modes. Pin 8 of the SCART connector can be used for the same purpose, and I'm willing to build some home-brew hardware to achieve such automatic switching. It might be possible to do much better by hacking the firmware, but as far as I know, no-one could reverse-engineer it yet... Cheers, Nicolas ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Dxr3-devel mailing list Dxr3-devel@... https://lists.sourceforge.net/lists/listinfo/dxr3-devel |
|
|
Re: WSS reloaded
by Nicolas Boullis
::
Rate this Message:
Hi,
On Thu, Apr 24, 2008 at 12:10:59AM +0200, Nicolas Boullis wrote: > Hi, > > I've tried to implement some support for WSS in my "em8300-scale-n-crop" > repository. > I tried it with no success, but I guess my good old 4:3 CRT TV set does > not support WSS... > > Could anyone with the corresponding hardware give it a try? > > To give it a try, clone my > http://freehg.org/u/nboullis/em8300-scale-n-crop/ repository, build the > modules and load them. (Ensure that the good adv717x module gets > loaded.) > > Then echo the desired WSS value (14-bit, 7 for 16:9, 8 for full 4:3) to > /sys/class/em8300/em8300-0/device/encoder/wss . Any negative value will > disable WSS. > > Note that it will trigger the flickering Ville mentionned. I have some > idea how to fix it, but I'd rather first be sure that it works as is. Here is some news. Ville Salmela kindly reported that it works fine for him, but that, as expected, the flickering is still present. Hence, I just applied the planned patch that avoids needlessly resetting the ADV717x chip. As far as I am concerned (my TV set does not understand WSS), the flickering is gone with this patch. But I need someone to confirm that the WSS still works. As usual, all comments are welcome. If everything works fine, I'm willing to implement some callback so the kernel tells a userspace application when the aspect ratio changes, and the userspace application decides to change the TV aspect ration, do some cropping and/or sets up WSS. Cheers, Nicolas ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Dxr3-devel mailing list Dxr3-devel@... https://lists.sourceforge.net/lists/listinfo/dxr3-devel |
| Free embeddable forum powered by Nabble | Forum Help |
