lavc: introduce VideoDSPContext

Move some functions from dsputil. The idea is that videodsp contains
functions that are useful for a large and varied set of video decoders.
Currently, it contains emulated_edge_mc() and prefetch().

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

1 files changed, 0 insertions, 79 deletions

diff --git a/libavcodec/dsputil_template.c b/libavcodec/dsputil_template.c
index 72ed6bfd2a..13f7628b2e 100644
--- a/libavcodec/dsputil_template.c
+++ b/libavcodec/dsputil_template.c
@@ -113,85 +113,6 @@ static void FUNCC(draw_edges)(uint8_t *_buf, int _wrap, int width, int height, i
             memcpy(last_line + (i + 1) * wrap, last_line, (width + w + w) * sizeof(pixel)); // bottom
 }
 
-/**
- * Copy a rectangular area of samples to a temporary buffer and replicate the border samples.
- * @param buf destination buffer
- * @param src source buffer
- * @param linesize number of bytes between 2 vertically adjacent samples in both the source and destination buffers
- * @param block_w width of block
- * @param block_h height of block
- * @param src_x x coordinate of the top left sample of the block in the source buffer
- * @param src_y y coordinate of the top left sample of the block in the source buffer
- * @param w width of the source buffer
- * @param h height of the source buffer
- */
-void FUNC(ff_emulated_edge_mc)(uint8_t *buf, const uint8_t *src, int linesize, int block_w, int block_h,
-                                    int src_x, int src_y, int w, int h){
-    int x, y;
-    int start_y, start_x, end_y, end_x;
-
-    if(src_y>= h){
-        src+= (h-1-src_y)*linesize;
-        src_y=h-1;
-    }else if(src_y<=-block_h){
-        src+= (1-block_h-src_y)*linesize;
-        src_y=1-block_h;
-    }
-    if(src_x>= w){
-        src+= (w-1-src_x)*sizeof(pixel);
-        src_x=w-1;
-    }else if(src_x<=-block_w){
-        src+= (1-block_w-src_x)*sizeof(pixel);
-        src_x=1-block_w;
-    }
-
-    start_y= FFMAX(0, -src_y);
-    start_x= FFMAX(0, -src_x);
-    end_y= FFMIN(block_h, h-src_y);
-    end_x= FFMIN(block_w, w-src_x);
-    assert(start_y < end_y && block_h);
-    assert(start_x < end_x && block_w);
-
-    w    = end_x - start_x;
-    src += start_y*linesize + start_x*sizeof(pixel);
-    buf += start_x*sizeof(pixel);
-
-    //top
-    for(y=0; y<start_y; y++){
-        memcpy(buf, src, w*sizeof(pixel));
-        buf += linesize;
-    }
-
-    // copy existing part
-    for(; y<end_y; y++){
-        memcpy(buf, src, w*sizeof(pixel));
-        src += linesize;
-        buf += linesize;
-    }
-
-    //bottom
-    src -= linesize;
-    for(; y<block_h; y++){
-        memcpy(buf, src, w*sizeof(pixel));
-        buf += linesize;
-    }
-
-    buf -= block_h * linesize + start_x*sizeof(pixel);
-    while (block_h--){
-        pixel *bufp = (pixel*)buf;
-       //left
-        for(x=0; x<start_x; x++){
-            bufp[x] = bufp[start_x];
-        }
-
-       //right
-        for(x=end_x; x<block_w; x++){
-            bufp[x] = bufp[end_x - 1];
-        }
-        buf += linesize;
-    }
-}
-
 #define DCTELEM_FUNCS(dctcoef, suffix)                                  \
 static void FUNCC(get_pixels ## suffix)(DCTELEM *restrict _block,       \
                                         const uint8_t *_pixels,         \