87908de715
Currently all uses of the emu edge code as well as the code itself
assume int linesize
changing some but not changing all would introduce a security issue
once all use this typedef a simple search and replace can be
done to switch them all to ptrdiff_t
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 2ffead98dd)
Conflicts:
libavcodec/videodsp.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>
128 lines
4.4 KiB
C
128 lines
4.4 KiB
C
/*
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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 "config.h"
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#include "libavutil/avassert.h"
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#include "libavutil/common.h"
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#include "libavutil/cpu.h"
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#include "libavutil/mem.h"
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#include "libavutil/x86/asm.h"
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#include "libavcodec/videodsp.h"
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#if HAVE_YASM
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typedef void emu_edge_core_func(uint8_t *buf, const uint8_t *src,
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x86_reg linesize, x86_reg start_y,
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x86_reg end_y, x86_reg block_h,
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x86_reg start_x, x86_reg end_x,
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x86_reg block_w);
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extern emu_edge_core_func ff_emu_edge_core_mmx;
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extern emu_edge_core_func ff_emu_edge_core_sse;
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static av_always_inline void emulated_edge_mc(uint8_t *buf, const uint8_t *src,
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ptrdiff_t linesize_arg,
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int block_w, int block_h,
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int src_x, int src_y,
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int w, int h,
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emu_edge_core_func *core_fn)
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{
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int start_y, start_x, end_y, end_x, src_y_add = 0;
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emuedge_linesize_type linesize = linesize_arg;
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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*linesize;
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src_y_add = h - 1;
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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*linesize;
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src_y_add = 1 - block_h;
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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;
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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;
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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_x < end_x && block_w > 0);
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av_assert2(start_y < end_y && block_h > 0);
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// fill in the to-be-copied part plus all above/below
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src += (src_y_add + start_y) * linesize + start_x;
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buf += start_x;
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core_fn(buf, src, linesize, start_y, end_y,
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block_h, start_x, end_x, block_w);
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}
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#if ARCH_X86_32
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static av_noinline void emulated_edge_mc_mmx(uint8_t *buf, const uint8_t *src,
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ptrdiff_t 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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emulated_edge_mc(buf, src, linesize, block_w, block_h, src_x, src_y,
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w, h, &ff_emu_edge_core_mmx);
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}
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#endif
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static av_noinline void emulated_edge_mc_sse(uint8_t *buf, const uint8_t *src,
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ptrdiff_t 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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emulated_edge_mc(buf, src, linesize, block_w, block_h, src_x, src_y,
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w, h, &ff_emu_edge_core_sse);
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}
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#endif /* HAVE_YASM */
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void ff_prefetch_mmxext(uint8_t *buf, ptrdiff_t stride, int h);
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void ff_prefetch_3dnow(uint8_t *buf, ptrdiff_t stride, int h);
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void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc)
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{
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#if HAVE_YASM
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int mm_flags = av_get_cpu_flags();
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#if ARCH_X86_32
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if (bpc <= 8 && mm_flags & AV_CPU_FLAG_MMX) {
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ctx->emulated_edge_mc = emulated_edge_mc_mmx;
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}
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if (mm_flags & AV_CPU_FLAG_3DNOW) {
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ctx->prefetch = ff_prefetch_3dnow;
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}
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#endif /* ARCH_X86_32 */
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if (mm_flags & AV_CPU_FLAG_MMXEXT) {
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ctx->prefetch = ff_prefetch_mmxext;
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}
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if (bpc <= 8 && mm_flags & AV_CPU_FLAG_SSE) {
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ctx->emulated_edge_mc = emulated_edge_mc_sse;
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}
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#endif /* HAVE_YASM */
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}
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