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100 lines
2.9 KiB
100 lines
2.9 KiB
/* |
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* Copyright (c) 2002-2012 Michael Niedermayer |
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* Copyright (C) 2012 Ronald S. Bultje |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <assert.h> |
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#include "bit_depth_template.c" |
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void FUNC(ff_emulated_edge_mc)(uint8_t *buf, const uint8_t *src, |
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ptrdiff_t buf_linesize, |
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ptrdiff_t src_linesize, |
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int block_w, int block_h, |
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int src_x, int src_y, int w, int h) |
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{ |
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int x, y; |
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int start_y, start_x, end_y, end_x; |
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if (!w || !h) |
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return; |
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if (src_y >= h) { |
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src -= src_y * src_linesize; |
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src += (h - 1) * src_linesize; |
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src_y = h - 1; |
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} else if (src_y <= -block_h) { |
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src -= src_y * src_linesize; |
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src += (1 - block_h) * src_linesize; |
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src_y = 1 - block_h; |
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} |
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if (src_x >= w) { |
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src += (w - 1 - src_x) * sizeof(pixel); |
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src_x = w - 1; |
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} else if (src_x <= -block_w) { |
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src += (1 - block_w - src_x) * sizeof(pixel); |
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src_x = 1 - block_w; |
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} |
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start_y = FFMAX(0, -src_y); |
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start_x = FFMAX(0, -src_x); |
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end_y = FFMIN(block_h, h-src_y); |
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end_x = FFMIN(block_w, w-src_x); |
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av_assert2(start_y < end_y && block_h); |
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av_assert2(start_x < end_x && block_w); |
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w = end_x - start_x; |
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src += start_y * src_linesize + start_x * sizeof(pixel); |
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buf += start_x * sizeof(pixel); |
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// top |
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for (y = 0; y < start_y; y++) { |
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memcpy(buf, src, w * sizeof(pixel)); |
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buf += buf_linesize; |
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} |
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// copy existing part |
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for (; y < end_y; y++) { |
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memcpy(buf, src, w * sizeof(pixel)); |
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src += src_linesize; |
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buf += buf_linesize; |
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} |
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// bottom |
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src -= src_linesize; |
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for (; y < block_h; y++) { |
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memcpy(buf, src, w * sizeof(pixel)); |
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buf += buf_linesize; |
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} |
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buf -= block_h * buf_linesize + start_x * sizeof(pixel); |
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while (block_h--) { |
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pixel *bufp = (pixel *) buf; |
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// left |
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for(x = 0; x < start_x; x++) { |
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bufp[x] = bufp[start_x]; |
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} |
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// right |
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for (x = end_x; x < block_w; x++) { |
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bufp[x] = bufp[end_x - 1]; |
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} |
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buf += buf_linesize; |
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} |
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}
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