1/* 2 * Copyright (c) 2002-2012 Michael Niedermayer 3 * Copyright (C) 2012 Ronald S. Bultje 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg 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. 11 * 12 * FFmpeg 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. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include <assert.h> 23 24#include "bit_depth_template.c" 25void FUNC(ff_emulated_edge_mc)(uint8_t *buf, const uint8_t *src, 26 ptrdiff_t buf_linesize, 27 ptrdiff_t src_linesize, 28 int block_w, int block_h, 29 int src_x, int src_y, int w, int h) 30{ 31 int x, y; 32 int start_y, start_x, end_y, end_x; 33 34 if (!w || !h) 35 return; 36 37 if (src_y >= h) { 38 src -= src_y * src_linesize; 39 src += (h - 1) * src_linesize; 40 src_y = h - 1; 41 } else if (src_y <= -block_h) { 42 src -= src_y * src_linesize; 43 src += (1 - block_h) * src_linesize; 44 src_y = 1 - block_h; 45 } 46 if (src_x >= w) { 47 src += (w - 1 - src_x) * sizeof(pixel); 48 src_x = w - 1; 49 } else if (src_x <= -block_w) { 50 src += (1 - block_w - src_x) * sizeof(pixel); 51 src_x = 1 - block_w; 52 } 53 54 start_y = FFMAX(0, -src_y); 55 start_x = FFMAX(0, -src_x); 56 end_y = FFMIN(block_h, h-src_y); 57 end_x = FFMIN(block_w, w-src_x); 58 av_assert2(start_y < end_y && block_h); 59 av_assert2(start_x < end_x && block_w); 60 61 w = end_x - start_x; 62 src += start_y * src_linesize + start_x * sizeof(pixel); 63 buf += start_x * sizeof(pixel); 64 65 // top 66 for (y = 0; y < start_y; y++) { 67 memcpy(buf, src, w * sizeof(pixel)); 68 buf += buf_linesize; 69 } 70 71 // copy existing part 72 for (; y < end_y; y++) { 73 memcpy(buf, src, w * sizeof(pixel)); 74 src += src_linesize; 75 buf += buf_linesize; 76 } 77 78 // bottom 79 src -= src_linesize; 80 for (; y < block_h; y++) { 81 memcpy(buf, src, w * sizeof(pixel)); 82 buf += buf_linesize; 83 } 84 85 buf -= block_h * buf_linesize + start_x * sizeof(pixel); 86 while (block_h--) { 87 pixel *bufp = (pixel *) buf; 88 89 // left 90 for(x = 0; x < start_x; x++) { 91 bufp[x] = bufp[start_x]; 92 } 93 94 // right 95 for (x = end_x; x < block_w; x++) { 96 bufp[x] = bufp[end_x - 1]; 97 } 98 buf += buf_linesize; 99 } 100} 101