80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
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/*
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* SIMD-optimized pixel operations
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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 "libavutil/attributes.h"
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#include "libavcodec/pixblockdsp.h"
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#include "asm.h"
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static void get_pixels_mvi(int16_t *restrict block,
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const uint8_t *restrict pixels, ptrdiff_t stride)
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{
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int h = 8;
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do {
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uint64_t p;
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p = ldq(pixels);
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stq(unpkbw(p), block);
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stq(unpkbw(p >> 32), block + 4);
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pixels += stride;
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block += 8;
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} while (--h);
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}
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static void diff_pixels_mvi(int16_t *block, const uint8_t *s1, const uint8_t *s2,
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ptrdiff_t stride)
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{
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int h = 8;
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uint64_t mask = 0x4040;
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mask |= mask << 16;
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mask |= mask << 32;
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do {
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uint64_t x, y, c, d, a;
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uint64_t signs;
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x = ldq(s1);
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y = ldq(s2);
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c = cmpbge(x, y);
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d = x - y;
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a = zap(mask, c); /* We use 0x4040404040404040 here... */
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d += 4 * a; /* ...so we can use s4addq here. */
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signs = zap(-1, c);
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stq(unpkbw(d) | (unpkbw(signs) << 8), block);
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stq(unpkbw(d >> 32) | (unpkbw(signs >> 32) << 8), block + 4);
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s1 += stride;
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s2 += stride;
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block += 8;
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} while (--h);
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}
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av_cold void ff_pixblockdsp_init_alpha(PixblockDSPContext *c, AVCodecContext *avctx,
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unsigned high_bit_depth)
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{
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if (amask(AMASK_MVI) == 0) {
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if (!high_bit_depth)
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c->get_pixels = get_pixels_mvi;
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c->diff_pixels = diff_pixels_mvi;
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}
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}
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