| /* |
| * 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 "pixelutils.h" |
| #include "cpu.h" |
| |
| int ff_pixelutils_sad_8x8_mmx(const uint8_t *src1, ptrdiff_t stride1, |
| const uint8_t *src2, ptrdiff_t stride2); |
| int ff_pixelutils_sad_8x8_mmxext(const uint8_t *src1, ptrdiff_t stride1, |
| const uint8_t *src2, ptrdiff_t stride2); |
| |
| int ff_pixelutils_sad_16x16_mmxext(const uint8_t *src1, ptrdiff_t stride1, |
| const uint8_t *src2, ptrdiff_t stride2); |
| int ff_pixelutils_sad_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1, |
| const uint8_t *src2, ptrdiff_t stride2); |
| int ff_pixelutils_sad_a_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1, |
| const uint8_t *src2, ptrdiff_t stride2); |
| int ff_pixelutils_sad_u_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1, |
| const uint8_t *src2, ptrdiff_t stride2); |
| |
| void ff_pixelutils_sad_init_x86(av_pixelutils_sad_fn *sad, int aligned) |
| { |
| int cpu_flags = av_get_cpu_flags(); |
| |
| if (EXTERNAL_MMX(cpu_flags)) { |
| sad[2] = ff_pixelutils_sad_8x8_mmx; |
| } |
| |
| // The best way to use SSE2 would be to do 2 SADs in parallel, |
| // but we'd have to modify the pixelutils API to return SIMD functions. |
| |
| // It's probably not faster to shuffle data around |
| // to get two lines of 8 pixels into a single 16byte register, |
| // so just use the MMX 8x8 version even when SSE2 is available. |
| if (EXTERNAL_MMXEXT(cpu_flags)) { |
| sad[2] = ff_pixelutils_sad_8x8_mmxext; |
| sad[3] = ff_pixelutils_sad_16x16_mmxext; |
| } |
| |
| if (EXTERNAL_SSE2(cpu_flags)) { |
| switch (aligned) { |
| case 0: sad[3] = ff_pixelutils_sad_16x16_sse2; break; // src1 unaligned, src2 unaligned |
| case 1: sad[3] = ff_pixelutils_sad_u_16x16_sse2; break; // src1 aligned, src2 unaligned |
| case 2: sad[3] = ff_pixelutils_sad_a_16x16_sse2; break; // src1 aligned, src2 aligned |
| } |
| } |
| } |