120 lines
4.7 KiB
C
120 lines
4.7 KiB
C
/*
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* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "vp8/encoder/denoising.h"
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#include "vp8/common/reconinter.h"
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#include "vpx/vpx_integer.h"
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#include "vpx_mem/vpx_mem.h"
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#include "vp8_rtcd.h"
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#include <emmintrin.h>
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union sum_union {
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__m128i v;
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signed char e[16];
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};
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int vp8_denoiser_filter_sse2(YV12_BUFFER_CONFIG *mc_running_avg,
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YV12_BUFFER_CONFIG *running_avg,
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MACROBLOCK *signal, unsigned int motion_magnitude,
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int y_offset, int uv_offset)
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{
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unsigned char *sig = signal->thismb;
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int sig_stride = 16;
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unsigned char *mc_running_avg_y = mc_running_avg->y_buffer + y_offset;
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int mc_avg_y_stride = mc_running_avg->y_stride;
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unsigned char *running_avg_y = running_avg->y_buffer + y_offset;
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int avg_y_stride = running_avg->y_stride;
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int r;
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__m128i acc_diff = _mm_setzero_si128();
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const __m128i k_0 = _mm_setzero_si128();
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const __m128i k_4 = _mm_set1_epi8(4);
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const __m128i k_8 = _mm_set1_epi8(8);
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const __m128i k_16 = _mm_set1_epi8(16);
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/* Modify each level's adjustment according to motion_magnitude. */
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const __m128i l3 = _mm_set1_epi8(
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(motion_magnitude <= MOTION_MAGNITUDE_THRESHOLD) ? 7 : 6);
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/* Difference between level 3 and level 2 is 2. */
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const __m128i l32 = _mm_set1_epi8(2);
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/* Difference between level 2 and level 1 is 1. */
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const __m128i l21 = _mm_set1_epi8(1);
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for (r = 0; r < 16; ++r)
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{
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/* Calculate differences */
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const __m128i v_sig = _mm_loadu_si128((__m128i *)(&sig[0]));
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const __m128i v_mc_running_avg_y = _mm_loadu_si128(
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(__m128i *)(&mc_running_avg_y[0]));
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__m128i v_running_avg_y;
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const __m128i pdiff = _mm_subs_epu8(v_mc_running_avg_y, v_sig);
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const __m128i ndiff = _mm_subs_epu8(v_sig, v_mc_running_avg_y);
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/* Obtain the sign. FF if diff is negative. */
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const __m128i diff_sign = _mm_cmpeq_epi8(pdiff, k_0);
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/* Clamp absolute difference to 16 to be used to get mask. Doing this
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* allows us to use _mm_cmpgt_epi8, which operates on signed byte. */
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const __m128i clamped_absdiff = _mm_min_epu8(
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_mm_or_si128(pdiff, ndiff), k_16);
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/* Get masks for l2 l1 and l0 adjustments */
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const __m128i mask2 = _mm_cmpgt_epi8(k_16, clamped_absdiff);
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const __m128i mask1 = _mm_cmpgt_epi8(k_8, clamped_absdiff);
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const __m128i mask0 = _mm_cmpgt_epi8(k_4, clamped_absdiff);
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/* Get adjustments for l2, l1, and l0 */
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__m128i adj2 = _mm_and_si128(mask2, l32);
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const __m128i adj1 = _mm_and_si128(mask1, l21);
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const __m128i adj0 = _mm_and_si128(mask0, clamped_absdiff);
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__m128i adj, padj, nadj;
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/* Combine the adjustments and get absolute adjustments. */
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adj2 = _mm_add_epi8(adj2, adj1);
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adj = _mm_sub_epi8(l3, adj2);
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adj = _mm_andnot_si128(mask0, adj);
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adj = _mm_or_si128(adj, adj0);
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/* Restore the sign and get positive and negative adjustments. */
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padj = _mm_andnot_si128(diff_sign, adj);
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nadj = _mm_and_si128(diff_sign, adj);
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/* Calculate filtered value. */
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v_running_avg_y = _mm_adds_epu8(v_sig, padj);
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v_running_avg_y = _mm_subs_epu8(v_running_avg_y, nadj);
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_mm_storeu_si128((__m128i *)running_avg_y, v_running_avg_y);
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/* Adjustments <=7, and each element in acc_diff can fit in signed
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* char.
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*/
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acc_diff = _mm_adds_epi8(acc_diff, padj);
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acc_diff = _mm_subs_epi8(acc_diff, nadj);
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/* Update pointers for next iteration. */
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sig += sig_stride;
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mc_running_avg_y += mc_avg_y_stride;
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running_avg_y += avg_y_stride;
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}
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{
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/* Compute the sum of all pixel differences of this MB. */
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union sum_union s;
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int sum_diff = 0;
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s.v = acc_diff;
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sum_diff = s.e[0] + s.e[1] + s.e[2] + s.e[3] + s.e[4] + s.e[5]
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+ s.e[6] + s.e[7] + s.e[8] + s.e[9] + s.e[10] + s.e[11]
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+ s.e[12] + s.e[13] + s.e[14] + s.e[15];
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if (abs(sum_diff) > SUM_DIFF_THRESHOLD)
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{
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return COPY_BLOCK;
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}
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}
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vp8_copy_mem16x16(running_avg->y_buffer + y_offset, avg_y_stride,
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signal->thismb, sig_stride);
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return FILTER_BLOCK;
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}
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