2 * This file is part of Libav.
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/attributes.h"
24 #include "huffyuvdsp.h"
26 // 0x7f7f7f7f or 0x7f7f7f7f7f7f7f7f or whatever, depending on the cpu's native arithmetic size
27 #define pb_7f (~0UL / 255 * 0x7f)
28 #define pb_80 (~0UL / 255 * 0x80)
30 static void add_bytes_c(uint8_t *dst, uint8_t *src, int w)
34 for (i = 0; i <= w - (int) sizeof(long); i += sizeof(long)) {
35 long a = *(long *) (src + i);
36 long b = *(long *) (dst + i);
37 *(long *) (dst + i) = ((a & pb_7f) + (b & pb_7f)) ^ ((a ^ b) & pb_80);
40 dst[i + 0] += src[i + 0];
43 static void add_hfyu_median_pred_c(uint8_t *dst, const uint8_t *src1,
44 const uint8_t *diff, int w,
45 int *left, int *left_top)
53 for (i = 0; i < w; i++) {
54 l = mid_pred(l, src1[i], (l + src1[i] - lt) & 0xFF) + diff[i];
63 static int add_hfyu_left_pred_c(uint8_t *dst, const uint8_t *src, int w,
68 for (i = 0; i < w - 1; i++) {
95 static void add_hfyu_left_pred_bgr32_c(uint8_t *dst, const uint8_t *src,
96 int w, int *red, int *green,
97 int *blue, int *alpha)
99 int i, r = *red, g = *green, b = *blue, a = *alpha;
101 for (i = 0; i < w; i++) {
123 av_cold void ff_huffyuvdsp_init(HuffYUVDSPContext *c)
125 c->add_bytes = add_bytes_c;
126 c->add_hfyu_median_pred = add_hfyu_median_pred_c;
127 c->add_hfyu_left_pred = add_hfyu_left_pred_c;
128 c->add_hfyu_left_pred_bgr32 = add_hfyu_left_pred_bgr32_c;
131 ff_huffyuvdsp_init_x86(c);