4e25e253f62348f7acb54c7caaceb0cc37a5500e
[deb_ffmpeg.git] / svq1enc_altivec.c
1 /*
2 * Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <stdint.h>
22
23 #include "config.h"
24 #if HAVE_ALTIVEC_H
25 #include <altivec.h>
26 #endif
27
28 #include "libavutil/attributes.h"
29 #include "libavutil/cpu.h"
30 #include "libavutil/ppc/cpu.h"
31 #include "libavutil/ppc/types_altivec.h"
32 #include "libavutil/ppc/util_altivec.h"
33 #include "libavcodec/svq1enc.h"
34
35 #if HAVE_ALTIVEC
36 static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2,
37 int size)
38 {
39 int i, size16 = size >> 4;
40 vector signed char vpix1;
41 vector signed short vpix2, vdiff, vpix1l, vpix1h;
42 union {
43 vector signed int vscore;
44 int32_t score[4];
45 } u = { .vscore = vec_splat_s32(0) };
46
47 while (size16) {
48 // score += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]);
49 // load pix1 and the first batch of pix2
50
51 vpix1 = vec_unaligned_load(pix1);
52 vpix2 = vec_unaligned_load(pix2);
53 pix2 += 8;
54 // unpack
55 vpix1h = vec_unpackh(vpix1);
56 vdiff = vec_sub(vpix1h, vpix2);
57 vpix1l = vec_unpackl(vpix1);
58 // load another batch from pix2
59 vpix2 = vec_unaligned_load(pix2);
60 u.vscore = vec_msum(vdiff, vdiff, u.vscore);
61 vdiff = vec_sub(vpix1l, vpix2);
62 u.vscore = vec_msum(vdiff, vdiff, u.vscore);
63 pix1 += 16;
64 pix2 += 8;
65 size16--;
66 }
67 u.vscore = vec_sums(u.vscore, vec_splat_s32(0));
68
69 size %= 16;
70 for (i = 0; i < size; i++)
71 u.score[3] += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]);
72
73 return u.score[3];
74 }
75 #endif /* HAVE_ALTIVEC */
76
77 av_cold void ff_svq1enc_init_ppc(SVQ1EncContext *c)
78 {
79 #if HAVE_ALTIVEC
80 if (!PPC_ALTIVEC(av_get_cpu_flags()))
81 return;
82
83 c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec;
84 #endif /* HAVE_ALTIVEC */
85 }