aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* SIMD-optimized pixel operations
*
* 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 "libavutil/attributes.h"
#include "libavcodec/pixblockdsp.h"
#include "asm.h"
static void get_pixels_mvi(int16_t *restrict block,
const uint8_t *restrict pixels, ptrdiff_t stride)
{
int h = 8;
do {
uint64_t p;
p = ldq(pixels);
stq(unpkbw(p), block);
stq(unpkbw(p >> 32), block + 4);
pixels += stride;
block += 8;
} while (--h);
}
static void diff_pixels_mvi(int16_t *block, const uint8_t *s1, const uint8_t *s2,
ptrdiff_t stride)
{
int h = 8;
uint64_t mask = 0x4040;
mask |= mask << 16;
mask |= mask << 32;
do {
uint64_t x, y, c, d, a;
uint64_t signs;
x = ldq(s1);
y = ldq(s2);
c = cmpbge(x, y);
d = x - y;
a = zap(mask, c); /* We use 0x4040404040404040 here... */
d += 4 * a; /* ...so we can use s4addq here. */
signs = zap(-1, c);
stq(unpkbw(d) | (unpkbw(signs) << 8), block);
stq(unpkbw(d >> 32) | (unpkbw(signs >> 32) << 8), block + 4);
s1 += stride;
s2 += stride;
block += 8;
} while (--h);
}
av_cold void ff_pixblockdsp_init_alpha(PixblockDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth)
{
if (amask(AMASK_MVI) == 0) {
if (!high_bit_depth)
c->get_pixels = get_pixels_mvi;
c->diff_pixels = diff_pixels_mvi;
}
}
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