ref: 5898758bc15479848f12bb68b1e698ecd3acf8b4
dir: /src/arm/looprestoration_init_tmpl.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" #include "src/tables.h" #if BITDEPTH == 8 && ARCH_AARCH64 // This calculates things slightly differently than the reference C version. // This version calculates roughly this: // int16_t sum = 0; // for (int i = 0; i < 7; i++) // sum += src[idx] * fh[i]; // int16_t sum2 = (src[x] << 7) - (1 << (BITDEPTH + 6)) + rounding_off_h; // sum = iclip(sum + sum2, INT16_MIN, INT16_MAX) >> round_bits_h; // sum += 2048; void dav1d_wiener_filter_h_neon(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); // This calculates things slightly differently than the reference C version. // This version calculates roughly this: // fv[3] += 128; // int32_t sum = 0; // for (int i = 0; i < 7; i++) // sum += mid[idx] * fv[i]; // sum = (sum + rounding_off_v) >> round_bits_v; // This function assumes that the width is a multiple of 8. void dav1d_wiener_filter_v_neon(pixel *dst, ptrdiff_t stride, const int16_t *mid, int w, int h, const int16_t fv[7], enum LrEdgeFlags edges, ptrdiff_t mid_stride); void dav1d_copy_narrow_neon(pixel *dst, ptrdiff_t stride, const pixel *src, int w, int h); static void wiener_filter_neon(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_16(int16_t, mid, 68 * 384,); int mid_stride = (w + 7) & ~7; // Horizontal filter dav1d_wiener_filter_h_neon(&mid[2 * mid_stride], left, dst, dst_stride, fh, w, h, edges); if (edges & LR_HAVE_TOP) dav1d_wiener_filter_h_neon(mid, NULL, lpf, lpf_stride, fh, w, 2, edges); if (edges & LR_HAVE_BOTTOM) dav1d_wiener_filter_h_neon(&mid[(2 + h) * mid_stride], NULL, lpf + 6 * PXSTRIDE(lpf_stride), lpf_stride, fh, w, 2, edges); // Vertical filter if (w >= 8) dav1d_wiener_filter_v_neon(dst, dst_stride, &mid[2*mid_stride], w & ~7, h, fv, edges, mid_stride * sizeof(*mid)); if (w & 7) { // For uneven widths, do a full 8 pixel wide filtering into a temp // buffer and copy out the narrow slice of pixels separately into dest. ALIGN_STK_16(pixel, tmp, 64 * 8,); dav1d_wiener_filter_v_neon(tmp, w & 7, &mid[2*mid_stride + (w & ~7)], w & 7, h, fv, edges, mid_stride * sizeof(*mid)); dav1d_copy_narrow_neon(dst + (w & ~7), dst_stride, tmp, w & 7, h); } } #endif void bitfn(dav1d_loop_restoration_dsp_init_arm)(Dav1dLoopRestorationDSPContext *const c) { const unsigned flags = dav1d_get_cpu_flags(); if (!(flags & DAV1D_ARM_CPU_FLAG_NEON)) return; #if BITDEPTH == 8 && ARCH_AARCH64 c->wiener = wiener_filter_neon; #endif }