ref: 690ed6881305c9ba403b5d62f3c40698d15bfe99
dir: /src/x86/looprestoration_init.c/
/*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2018, Two Orioles, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "src/cpu.h"
#include "src/looprestoration.h"
#include "common/attributes.h"
#include "common/intops.h"
#if BITDEPTH == 8 && ARCH_X86_64
void dav1d_wiener_filter_h_avx2(int16_t *dst, const pixel (*left)[4],
const pixel *src, ptrdiff_t stride,
const int16_t fh[7], const intptr_t w,
int h, enum LrEdgeFlags edges);
void dav1d_wiener_filter_v_avx2(pixel *dst, ptrdiff_t stride,
const int16_t *mid, int w, int h,
const int16_t fv[7], enum LrEdgeFlags edges);
// Future potential optimizations:
// - special chroma versions which don't filter [0]/[6];
// - running filter_h_avx2 transposed (one col of 32 pixels per iteration, top
// to bottom) instead of scanline-ordered should be faster since then the
// if (have_left) and similar conditions run only once instead of per line;
// - filter_v_avx2 currently runs 16 pixels per iteration, it should be possible
// to run 32 (like filter_h_avx2), and then all vpermqs can go;
// - maybe split out the top/bottom filter_h_avx2 from the main body filter_h_avx2,
// since then the have_left condition can be inlined;
// - consider having the wrapper (wiener_filter_avx2) also in hand-written
// assembly, so the setup overhead is minimized.
static void wiener_filter_avx2(pixel *const dst, const ptrdiff_t dst_stride,
const pixel (*const left)[4],
const pixel *lpf, const ptrdiff_t lpf_stride,
const int w, const int h, const int16_t fh[7],
const int16_t fv[7], const enum LrEdgeFlags edges)
{
ALIGN_STK_32(int16_t, mid, 68 * 384,);
// horizontal filter
dav1d_wiener_filter_h_avx2(&mid[2 * 384], left, dst, dst_stride,
fh, w, h, edges);
if (edges & LR_HAVE_TOP)
dav1d_wiener_filter_h_avx2(mid, NULL, lpf, lpf_stride,
fh, w, 2, edges);
if (edges & LR_HAVE_BOTTOM)
dav1d_wiener_filter_h_avx2(&mid[(2 + h) * 384], NULL,
lpf + 6 * PXSTRIDE(lpf_stride), lpf_stride,
fh, w, 2, edges);
dav1d_wiener_filter_v_avx2(dst, dst_stride, &mid[2*384], w, h, fv, edges);
}
#endif
void bitfn(dav1d_loop_restoration_dsp_init_x86)(Dav1dLoopRestorationDSPContext *const c) {
const unsigned flags = dav1d_get_cpu_flags();
if (!(flags & DAV1D_X86_CPU_FLAG_AVX2)) return;
#if BITDEPTH == 8 && ARCH_X86_64
c->wiener = wiener_filter_avx2;
#endif
}