diff options
Diffstat (limited to 'libavcodec/ppc/lossless_videodsp_altivec.c')
-rw-r--r-- | libavcodec/ppc/lossless_videodsp_altivec.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/libavcodec/ppc/lossless_videodsp_altivec.c b/libavcodec/ppc/lossless_videodsp_altivec.c new file mode 100644 index 0000000..980f85b --- /dev/null +++ b/libavcodec/ppc/lossless_videodsp_altivec.c @@ -0,0 +1,59 @@ +/* + * Copyright (c) 2002 Brian Foley + * Copyright (c) 2002 Dieter Shirley + * Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org> + * + * 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 "libavutil/attributes.h" +#include "libavutil/cpu.h" +#include "libavutil/ppc/cpu.h" +#include "libavutil/ppc/util_altivec.h" + +#include "libavcodec/lossless_videodsp.h" + +#if HAVE_ALTIVEC +static void add_bytes_altivec(uint8_t *dst, uint8_t *src, ptrdiff_t w) +{ + register int i; + register vector unsigned char vdst, vsrc; + + /* dst and src are 16 bytes-aligned (guaranteed). */ + for (i = 0; i + 15 < w; i += 16) { + vdst = vec_ld(i, (unsigned char *) dst); + vsrc = vec_ld(i, (unsigned char *) src); + vdst = vec_add(vsrc, vdst); + vec_st(vdst, i, (unsigned char *) dst); + } + /* If w is not a multiple of 16. */ + for (; i < w; i++) + dst[i] = src[i]; +} +#endif /* HAVE_ALTIVEC */ + +av_cold void ff_llviddsp_init_ppc(LLVidDSPContext *c) +{ +#if HAVE_ALTIVEC + if (!PPC_ALTIVEC(av_get_cpu_flags())) + return; + + c->add_bytes = add_bytes_altivec; +#endif /* HAVE_ALTIVEC */ +} |