FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
huffyuvdsp_altivec.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2002 Brian Foley
3  * Copyright (c) 2002 Dieter Shirley
4  * Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
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"
33 #include "libavcodec/huffyuvdsp.h"
34 
35 #if HAVE_ALTIVEC
36 static void add_bytes_altivec(uint8_t *dst, uint8_t *src, intptr_t w)
37 {
38  register int i;
39  register vector unsigned char vdst, vsrc;
40 
41  /* dst and src are 16 bytes-aligned (guaranteed). */
42  for (i = 0; i + 15 < w; i += 16) {
43  vdst = vec_ld(i, (unsigned char *) dst);
44  vsrc = vec_ld(i, (unsigned char *) src);
45  vdst = vec_add(vsrc, vdst);
46  vec_st(vdst, i, (unsigned char *) dst);
47  }
48  /* If w is not a multiple of 16. */
49  for (; i < w; i++)
50  dst[i] = src[i];
51 }
52 #endif /* HAVE_ALTIVEC */
53 
55 {
56 #if HAVE_ALTIVEC
58  return;
59 
60  c->add_bytes = add_bytes_altivec;
61 #endif /* HAVE_ALTIVEC */
62 }