| /* |
| * Copyright (C) 2002-2012 Michael Niedermayer |
| * Copyright (C) 2012 Ronald S. Bultje |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "config.h" |
| #include "libavutil/attributes.h" |
| #include "libavutil/avassert.h" |
| #include "libavutil/common.h" |
| #include "libavutil/cpu.h" |
| #include "libavutil/mem.h" |
| #include "libavutil/x86/asm.h" |
| #include "libavcodec/videodsp.h" |
| |
| #if HAVE_YASM |
| typedef void emu_edge_core_func(uint8_t *buf, const uint8_t *src, |
| x86_reg linesize, x86_reg start_y, |
| x86_reg end_y, x86_reg block_h, |
| x86_reg start_x, x86_reg end_x, |
| x86_reg block_w); |
| extern emu_edge_core_func ff_emu_edge_core_mmx; |
| extern emu_edge_core_func ff_emu_edge_core_sse; |
| |
| static av_always_inline void emulated_edge_mc(uint8_t *buf, const uint8_t *src, |
| ptrdiff_t linesize_arg, |
| int block_w, int block_h, |
| int src_x, int src_y, |
| int w, int h, |
| emu_edge_core_func *core_fn) |
| { |
| int start_y, start_x, end_y, end_x, src_y_add = 0; |
| int linesize = linesize_arg; |
| |
| if(!w || !h) |
| return; |
| |
| if (src_y >= h) { |
| src -= src_y*linesize; |
| src_y_add = h - 1; |
| src_y = h - 1; |
| } else if (src_y <= -block_h) { |
| src -= src_y*linesize; |
| src_y_add = 1 - block_h; |
| src_y = 1 - block_h; |
| } |
| if (src_x >= w) { |
| src += w - 1 - src_x; |
| src_x = w - 1; |
| } else if (src_x <= -block_w) { |
| src += 1 - block_w - src_x; |
| src_x = 1 - block_w; |
| } |
| |
| start_y = FFMAX(0, -src_y); |
| start_x = FFMAX(0, -src_x); |
| end_y = FFMIN(block_h, h-src_y); |
| end_x = FFMIN(block_w, w-src_x); |
| av_assert2(start_x < end_x && block_w > 0); |
| av_assert2(start_y < end_y && block_h > 0); |
| |
| // fill in the to-be-copied part plus all above/below |
| src += (src_y_add + start_y) * linesize + start_x; |
| buf += start_x; |
| core_fn(buf, src, linesize, start_y, end_y, |
| block_h, start_x, end_x, block_w); |
| } |
| |
| #if ARCH_X86_32 |
| static av_noinline void emulated_edge_mc_mmx(uint8_t *buf, const uint8_t *src, |
| ptrdiff_t linesize, |
| int block_w, int block_h, |
| int src_x, int src_y, int w, int h) |
| { |
| emulated_edge_mc(buf, src, linesize, block_w, block_h, src_x, src_y, |
| w, h, &ff_emu_edge_core_mmx); |
| } |
| #endif |
| |
| static av_noinline void emulated_edge_mc_sse(uint8_t *buf, const uint8_t *src, |
| ptrdiff_t linesize, |
| int block_w, int block_h, |
| int src_x, int src_y, int w, int h) |
| { |
| emulated_edge_mc(buf, src, linesize, block_w, block_h, src_x, src_y, |
| w, h, &ff_emu_edge_core_sse); |
| } |
| #endif /* HAVE_YASM */ |
| |
| void ff_prefetch_mmxext(uint8_t *buf, ptrdiff_t stride, int h); |
| void ff_prefetch_3dnow(uint8_t *buf, ptrdiff_t stride, int h); |
| |
| av_cold void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc) |
| { |
| #if HAVE_YASM |
| int mm_flags = av_get_cpu_flags(); |
| |
| #if ARCH_X86_32 |
| if (bpc <= 8 && mm_flags & AV_CPU_FLAG_MMX) { |
| ctx->emulated_edge_mc = emulated_edge_mc_mmx; |
| } |
| if (mm_flags & AV_CPU_FLAG_3DNOW) { |
| ctx->prefetch = ff_prefetch_3dnow; |
| } |
| #endif /* ARCH_X86_32 */ |
| if (mm_flags & AV_CPU_FLAG_MMXEXT) { |
| ctx->prefetch = ff_prefetch_mmxext; |
| } |
| if (bpc <= 8 && mm_flags & AV_CPU_FLAG_SSE) { |
| ctx->emulated_edge_mc = emulated_edge_mc_sse; |
| } |
| #endif /* HAVE_YASM */ |
| } |