2 * Copyright (c) 2002-2004 Michael Niedermayer
3 * Copyright (C) 2012 Ronald S. Bultje
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "bit_depth_template.c"
24 static void FUNC(ff_emulated_edge_mc)(uint8_t *buf, const uint8_t *src,
25 ptrdiff_t buf_linesize,
26 ptrdiff_t src_linesize,
27 int block_w, int block_h,
28 int src_x, int src_y, int w, int h)
31 int start_y, start_x, end_y, end_x;
34 src += (h - 1 - src_y) * src_linesize;
36 } else if (src_y <= -block_h) {
37 src += (1 - block_h - src_y) * src_linesize;
41 src += (w - 1 - src_x) * sizeof(pixel);
43 } else if (src_x <= -block_w) {
44 src += (1 - block_w - src_x) * sizeof(pixel);
48 start_y = FFMAX(0, -src_y);
49 start_x = FFMAX(0, -src_x);
50 end_y = FFMIN(block_h, h-src_y);
51 end_x = FFMIN(block_w, w-src_x);
52 assert(start_y < end_y && block_h);
53 assert(start_x < end_x && block_w);
56 src += start_y * src_linesize + start_x * sizeof(pixel);
57 buf += start_x * sizeof(pixel);
60 for (y = 0; y < start_y; y++) {
61 memcpy(buf, src, w * sizeof(pixel));
66 for (; y < end_y; y++) {
67 memcpy(buf, src, w * sizeof(pixel));
74 for (; y < block_h; y++) {
75 memcpy(buf, src, w * sizeof(pixel));
79 buf -= block_h * buf_linesize + start_x * sizeof(pixel);
81 pixel *bufp = (pixel *) buf;
84 for(x = 0; x < start_x; x++) {
85 bufp[x] = bufp[start_x];
89 for (x = end_x; x < block_w; x++) {
90 bufp[x] = bufp[end_x - 1];