| /* |
| * Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.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 <stdint.h> |
| |
| #include "libavutil/attributes.h" |
| #include "libavutil/cpu.h" |
| #include "libavutil/ppc/cpu.h" |
| #include "libavutil/ppc/util_altivec.h" |
| |
| #include "libavcodec/svq1enc.h" |
| |
| #if HAVE_ALTIVEC |
| static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2, |
| intptr_t size) |
| { |
| int i, size16 = size >> 4; |
| vector signed char vpix1; |
| vector signed short vpix2, vdiff, vpix1l, vpix1h; |
| union { |
| vector signed int vscore; |
| int32_t score[4]; |
| } u = { .vscore = vec_splat_s32(0) }; |
| |
| while (size16) { |
| // score += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]); |
| // load pix1 and the first batch of pix2 |
| |
| vpix1 = vec_unaligned_load(pix1); |
| vpix2 = vec_unaligned_load(pix2); |
| pix2 += 8; |
| // unpack |
| vpix1h = vec_unpackh(vpix1); |
| vdiff = vec_sub(vpix1h, vpix2); |
| vpix1l = vec_unpackl(vpix1); |
| // load another batch from pix2 |
| vpix2 = vec_unaligned_load(pix2); |
| u.vscore = vec_msum(vdiff, vdiff, u.vscore); |
| vdiff = vec_sub(vpix1l, vpix2); |
| u.vscore = vec_msum(vdiff, vdiff, u.vscore); |
| pix1 += 16; |
| pix2 += 8; |
| size16--; |
| } |
| u.vscore = vec_sums(u.vscore, vec_splat_s32(0)); |
| |
| size %= 16; |
| for (i = 0; i < size; i++) |
| u.score[3] += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]); |
| |
| return u.score[3]; |
| } |
| #endif /* HAVE_ALTIVEC */ |
| |
| av_cold void ff_svq1enc_init_ppc(SVQ1EncContext *c) |
| { |
| #if HAVE_ALTIVEC |
| if (!PPC_ALTIVEC(av_get_cpu_flags())) |
| return; |
| |
| c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec; |
| #endif /* HAVE_ALTIVEC */ |
| } |