[FFmpeg-devel] [RESEND][PATCH] libswscale: Extend the unaccelerated path of the unscaled yuv2rgb special converter with support for rgb444 output format

[Michael Niedermayer]

On Mon, Mar 01, 2010 at 02:09:56AM +0100, Janusz Krzysztofik wrote:
> In order to play video on a 12-bit display, like OMAP1 frambuffer with 12-bit 
> LCD controller that my Amstrad Delta videophone is equipped with, one or more 
> libswscale converters with rgb444 output pixel format support are required. 
> This patch adds such support to the unaccelerated path of the unscaled yuv2rgb 
> special converter.
> 
> Created and tested against ffmpeg svn revision 22124, on to off:
> 	[PATCH v2] Add initial support for 12-bit color mode.
> 
> Tested on Amstrad Delta with 24bpp IJPG and MP43 sourcers using patched 
> mplayer video output drivers.
> 
> Signed-off-by: Janusz Krzysztofik <jkrzyszt at tis.icnet.pl>
> 
> ---
> Forgot to turn off line wrapping before sending it out, sorry.
> 
> Thanks,
> Janusz
> 
> 
[...]
> diff -upr trunk/libswscale/swscale.c trunk.rgb12/libswscale/swscale.c
> --- trunk/libswscale/swscale.c	2010-02-24 15:55:47.000000000 +0100
> +++ trunk.rgb12/libswscale/swscale.c	2010-02-25 11:30:58.000000000 +0100
> @@ -23,11 +23,11 @@
>  
>  /*
>    supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR32_1, BGR24, BGR16, BGR15, RGB32, RGB32_1, RGB24, Y8/Y800, YVU9/IF09, PAL8
> -  supported output formats: YV12, I420/IYUV, YUY2, UYVY, {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09
> +  supported output formats: YV12, I420/IYUV, YUY2, UYVY, {BGR,RGB}{1,4,8,12,15,16,24,32}, Y8/Y800, YVU9/IF09
>    {BGR,RGB}{1,4,8,15,16} support dithering

until the generic scaling code supports it it should not be listed as
supported

also it seems dithering is missing

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

In fact, the RIAA has been known to suggest that students drop out
of college or go to community college in order to be able to afford
settlements. -- The RIAA
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