lavfi: declare arrays that never change as static const

Signed-off-by: Paul B Mahol <onemda@gmail.com>
doc: move HTML CSS to a dedicated file default.css
doc/default.css: use ffmpeg.org website CSS

The attribute container of the top-level div is changed from "class" to
"id" to match the website CSS.

Improve consistency between website docs and local documentation style.
videodsp_template.c: fix year

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
x86/videodsp_init: Add back lost author attribution

Code originates from:
910b9f30 libavcodec/dsputil.c            (David Conrad        2010-05-27 04:39:27 +0000  334) void ff_emulated_edge_mc(uint8_t *buf, const uint8_t *src, int linesize, int block_w, int block_h,
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  335)                                     int src_x, int src_y, int w, int h){
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  336)     int x, y;
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  337)     int start_y, start_x, end_y, end_x;
b5a093b3 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-25 20:22:36 +0000  338)
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  339)     if(src_y>= h){
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  340)         src+= (h-1-src_y)*linesize;
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  341)         src_y=h-1;
225f9c44 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-15 00:25:53 +0000  342)     }else if(src_y<=-block_h){
225f9c44 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-15 00:25:53 +0000  343)         src+= (1-block_h-src_y)*linesize;
225f9c44 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-15 00:25:53 +0000  344)         src_y=1-block_h;
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  345)     }
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  346)     if(src_x>= w){
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  347)         src+= (w-1-src_x);
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  348)         src_x=w-1;
225f9c44 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-15 00:25:53 +0000  349)     }else if(src_x<=-block_w){
225f9c44 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-15 00:25:53 +0000  350)         src+= (1-block_w-src_x);
225f9c44 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-15 00:25:53 +0000  351)         src_x=1-block_w;
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  352)     }
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  353)
b8a78f41 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-11-10 11:46:59 +0000  354)     start_y= FFMAX(0, -src_y);
b8a78f41 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-11-10 11:46:59 +0000  355)     start_x= FFMAX(0, -src_x);
b8a78f41 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-11-10 11:46:59 +0000  356)     end_y= FFMIN(block_h, h-src_y);
b8a78f41 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-11-10 11:46:59 +0000  357)     end_x= FFMIN(block_w, w-src_x);

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
videodsp: Fix project name

These are all part of splited out dsp utils from FFmpeg

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>