| /* |
| * 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 "common.h" |
| #include "pixelutils.h" |
| #include "internal.h" |
| |
| #if CONFIG_PIXELUTILS |
| |
| #include "x86/pixelutils.h" |
| |
| static av_always_inline int sad_wxh(const uint8_t *src1, ptrdiff_t stride1, |
| const uint8_t *src2, ptrdiff_t stride2, |
| int w, int h) |
| { |
| int x, y, sum = 0; |
| |
| for (y = 0; y < h; y++) { |
| for (x = 0; x < w; x++) |
| sum += abs(src1[x] - src2[x]); |
| src1 += stride1; |
| src2 += stride2; |
| } |
| return sum; |
| } |
| |
| #define DECLARE_BLOCK_FUNCTIONS(size) \ |
| static int block_sad_##size##x##size##_c(const uint8_t *src1, ptrdiff_t stride1, \ |
| const uint8_t *src2, ptrdiff_t stride2) \ |
| { \ |
| return sad_wxh(src1, stride1, src2, stride2, size, size); \ |
| } |
| |
| DECLARE_BLOCK_FUNCTIONS(2) |
| DECLARE_BLOCK_FUNCTIONS(4) |
| DECLARE_BLOCK_FUNCTIONS(8) |
| DECLARE_BLOCK_FUNCTIONS(16) |
| DECLARE_BLOCK_FUNCTIONS(32) |
| |
| static const av_pixelutils_sad_fn sad_c[] = { |
| block_sad_2x2_c, |
| block_sad_4x4_c, |
| block_sad_8x8_c, |
| block_sad_16x16_c, |
| block_sad_32x32_c, |
| }; |
| |
| #endif /* CONFIG_PIXELUTILS */ |
| |
| av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, int aligned, void *log_ctx) |
| { |
| #if !CONFIG_PIXELUTILS |
| av_log(log_ctx, AV_LOG_ERROR, "pixelutils support is required " |
| "but libavutil is not compiled with it\n"); |
| return NULL; |
| #else |
| av_pixelutils_sad_fn sad[FF_ARRAY_ELEMS(sad_c)]; |
| |
| memcpy(sad, sad_c, sizeof(sad)); |
| |
| if (w_bits < 1 || w_bits > FF_ARRAY_ELEMS(sad) || |
| h_bits < 1 || h_bits > FF_ARRAY_ELEMS(sad)) |
| return NULL; |
| if (w_bits != h_bits) // only squared sad for now |
| return NULL; |
| |
| #if ARCH_X86 |
| ff_pixelutils_sad_init_x86(sad, aligned); |
| #endif |
| |
| return sad[w_bits - 1]; |
| #endif |
| } |