/* * 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 <stddef.h> #include "config.h" #include "pixelutils.h" #if CONFIG_PIXELUTILS #include <stdlib.h> #include <string.h> #include "attributes.h" #include "macros.h" #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, }; #else #include "log.h" #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 }