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,
26 int block_w, int block_h,
27 int src_x, int src_y, int w, int h)
30 int start_y, start_x, end_y, end_x;
33 src += (h - 1 - src_y) * linesize;
35 } else if (src_y <= -block_h) {
36 src += (1 - block_h - src_y) * linesize;
40 src += (w - 1 - src_x) * sizeof(pixel);
42 } else if (src_x <= -block_w) {
43 src += (1 - block_w - src_x) * sizeof(pixel);
47 start_y = FFMAX(0, -src_y);
48 start_x = FFMAX(0, -src_x);
49 end_y = FFMIN(block_h, h-src_y);
50 end_x = FFMIN(block_w, w-src_x);
51 assert(start_y < end_y && block_h);
52 assert(start_x < end_x && block_w);
55 src += start_y * linesize + start_x * sizeof(pixel);
56 buf += start_x * sizeof(pixel);
59 for (y = 0; y < start_y; y++) {
60 memcpy(buf, src, w * sizeof(pixel));
65 for (; y < end_y; y++) {
66 memcpy(buf, src, w * sizeof(pixel));
73 for (; y < block_h; y++) {
74 memcpy(buf, src, w * sizeof(pixel));
78 buf -= block_h * linesize + start_x * sizeof(pixel);
80 pixel *bufp = (pixel *) buf;
83 for(x = 0; x < start_x; x++) {
84 bufp[x] = bufp[start_x];
88 for (x = end_x; x < block_w; x++) {
89 bufp[x] = bufp[end_x - 1];