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https://github.com/FFmpeg/FFmpeg.git
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104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/*
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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 "config.h"
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#include <stdint.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/mpegvideoencdsp.h"
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#if HAVE_ALTIVEC && HAVE_BIGENDIAN
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static int pix_norm1_altivec(uint8_t *pix, int line_size)
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{
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int i, s = 0;
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const vector unsigned int zero =
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(const vector unsigned int) vec_splat_u32(0);
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vector unsigned char perm = vec_lvsl(0, pix);
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vector unsigned int sv = (vector unsigned int) vec_splat_u32(0);
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vector signed int sum;
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for (i = 0; i < 16; i++) {
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/* Read the potentially unaligned pixels. */
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vector unsigned char pixl = vec_ld(0, pix);
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vector unsigned char pixr = vec_ld(15, pix);
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vector unsigned char pixv = vec_perm(pixl, pixr, perm);
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/* Square the values, and add them to our sum. */
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sv = vec_msum(pixv, pixv, sv);
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pix += line_size;
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}
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/* Sum up the four partial sums, and put the result into s. */
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sum = vec_sums((vector signed int) sv, (vector signed int) zero);
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sum = vec_splat(sum, 3);
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vec_ste(sum, 0, &s);
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return s;
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}
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static int pix_sum_altivec(uint8_t *pix, int line_size)
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{
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int i, s;
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const vector unsigned int zero =
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(const vector unsigned int) vec_splat_u32(0);
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vector unsigned char perm = vec_lvsl(0, pix);
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vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
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vector signed int sumdiffs;
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for (i = 0; i < 16; i++) {
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/* Read the potentially unaligned 16 pixels into t1. */
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vector unsigned char pixl = vec_ld(0, pix);
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vector unsigned char pixr = vec_ld(15, pix);
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vector unsigned char t1 = vec_perm(pixl, pixr, perm);
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/* Add each 4 pixel group together and put 4 results into sad. */
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sad = vec_sum4s(t1, sad);
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pix += line_size;
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}
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/* Sum up the four partial sums, and put the result into s. */
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sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
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sumdiffs = vec_splat(sumdiffs, 3);
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vec_ste(sumdiffs, 0, &s);
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return s;
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}
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#endif /* HAVE_ALTIVEC */
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av_cold void ff_mpegvideoencdsp_init_ppc(MpegvideoEncDSPContext *c,
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AVCodecContext *avctx)
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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->pix_norm1 = pix_norm1_altivec;
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c->pix_sum = pix_sum_altivec;
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#endif /* HAVE_ALTIVEC */
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}
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