mirror of
https://github.com/FFmpeg/FFmpeg.git
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86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
/*
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* Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include "config.h"
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#if HAVE_ALTIVEC_H
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#include <altivec.h>
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#endif
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#include "libavutil/attributes.h"
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#include "libavutil/cpu.h"
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#include "libavutil/ppc/cpu.h"
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#include "libavutil/ppc/types_altivec.h"
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#include "libavutil/ppc/util_altivec.h"
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#include "libavcodec/svq1enc.h"
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#if HAVE_ALTIVEC && HAVE_BIGENDIAN
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static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2,
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int size)
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{
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int i, size16 = size >> 4;
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vector signed char vpix1;
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vector signed short vpix2, vdiff, vpix1l, vpix1h;
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union {
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vector signed int vscore;
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int32_t score[4];
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} u = { .vscore = vec_splat_s32(0) };
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while (size16) {
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// score += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]);
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// load pix1 and the first batch of pix2
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vpix1 = vec_unaligned_load(pix1);
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vpix2 = vec_unaligned_load(pix2);
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pix2 += 8;
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// unpack
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vpix1h = vec_unpackh(vpix1);
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vdiff = vec_sub(vpix1h, vpix2);
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vpix1l = vec_unpackl(vpix1);
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// load another batch from pix2
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vpix2 = vec_unaligned_load(pix2);
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u.vscore = vec_msum(vdiff, vdiff, u.vscore);
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vdiff = vec_sub(vpix1l, vpix2);
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u.vscore = vec_msum(vdiff, vdiff, u.vscore);
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pix1 += 16;
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pix2 += 8;
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size16--;
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}
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u.vscore = vec_sums(u.vscore, vec_splat_s32(0));
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size %= 16;
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for (i = 0; i < size; i++)
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u.score[3] += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]);
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return u.score[3];
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}
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#endif /* HAVE_ALTIVEC */
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av_cold void ff_svq1enc_init_ppc(SVQ1EncContext *c)
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{
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#if HAVE_ALTIVEC && HAVE_BIGENDIAN
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if (!PPC_ALTIVEC(av_get_cpu_flags()))
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return;
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c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec;
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#endif /* HAVE_ALTIVEC */
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}
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