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