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82 lines
2.5 KiB
82 lines
2.5 KiB
/* |
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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 FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 "config.h" |
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#include <stdint.h> |
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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/util_altivec.h" |
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#include "libavcodec/svq1enc.h" |
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#if HAVE_ALTIVEC |
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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 |
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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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