| /* |
| * 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" |
| |
| /* Compute the sum of all pixel differences of this MB. */ |
| static inline unsigned int abs_sum_diff_16x1(__m128i acc_diff) { |
| const __m128i k_1 = _mm_set1_epi16(1); |
| const __m128i acc_diff_lo = _mm_srai_epi16( |
| _mm_unpacklo_epi8(acc_diff, acc_diff), 8); |
| const __m128i acc_diff_hi = _mm_srai_epi16( |
| _mm_unpackhi_epi8(acc_diff, acc_diff), 8); |
| const __m128i acc_diff_16 = _mm_add_epi16(acc_diff_lo, acc_diff_hi); |
| const __m128i hg_fe_dc_ba = _mm_madd_epi16(acc_diff_16, k_1); |
| const __m128i hgfe_dcba = _mm_add_epi32(hg_fe_dc_ba, |
| _mm_srli_si128(hg_fe_dc_ba, 8)); |
| const __m128i hgfedcba = _mm_add_epi32(hgfe_dcba, |
| _mm_srli_si128(hgfe_dcba, 4)); |
| unsigned int sum_diff = _mm_cvtsi128_si32(hgfedcba); |
| |
| return abs(sum_diff); |
| } |
| |
| int vp8_denoiser_filter_sse2(unsigned char *mc_running_avg_y, |
| int mc_avg_y_stride, |
| unsigned char *running_avg_y, int avg_y_stride, |
| unsigned char *sig, int sig_stride, |
| unsigned int motion_magnitude, |
| int increase_denoising) |
| { |
| unsigned char *running_avg_y_start = running_avg_y; |
| unsigned char *sig_start = sig; |
| int sum_diff_thresh; |
| int r; |
| int shift_inc = (increase_denoising && |
| motion_magnitude <= MOTION_MAGNITUDE_THRESHOLD) ? 1 : 0; |
| __m128i acc_diff = _mm_setzero_si128(); |
| const __m128i k_0 = _mm_setzero_si128(); |
| const __m128i k_4 = _mm_set1_epi8(4 + shift_inc); |
| 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 + shift_inc : 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. */ |
| unsigned int abs_sum_diff = abs_sum_diff_16x1(acc_diff); |
| sum_diff_thresh = SUM_DIFF_THRESHOLD; |
| if (increase_denoising) sum_diff_thresh = SUM_DIFF_THRESHOLD_HIGH; |
| if (abs_sum_diff > sum_diff_thresh) { |
| // Before returning to copy the block (i.e., apply no denoising), |
| // checK if we can still apply some (weaker) temporal filtering to |
| // this block, that would otherwise not be denoised at all. Simplest |
| // is to apply an additional adjustment to running_avg_y to bring it |
| // closer to sig. The adjustment is capped by a maximum delta, and |
| // chosen such that in most cases the resulting sum_diff will be |
| // within the accceptable range given by sum_diff_thresh. |
| |
| // The delta is set by the excess of absolute pixel diff over the |
| // threshold. |
| int delta = ((abs_sum_diff - sum_diff_thresh) >> 8) + 1; |
| // Only apply the adjustment for max delta up to 3. |
| if (delta < 4) { |
| const __m128i k_delta = _mm_set1_epi8(delta); |
| sig -= sig_stride * 16; |
| mc_running_avg_y -= mc_avg_y_stride * 16; |
| running_avg_y -= avg_y_stride * 16; |
| for (r = 0; r < 16; ++r) { |
| __m128i v_running_avg_y = |
| _mm_loadu_si128((__m128i *)(&running_avg_y[0])); |
| // 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])); |
| 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 delta to get the adjustment. |
| const __m128i adj = |
| _mm_min_epu8(_mm_or_si128(pdiff, ndiff), k_delta); |
| // Restore the sign and get positive and negative adjustments. |
| __m128i padj, nadj; |
| padj = _mm_andnot_si128(diff_sign, adj); |
| nadj = _mm_and_si128(diff_sign, adj); |
| // Calculate filtered value. |
| v_running_avg_y = _mm_subs_epu8(v_running_avg_y, padj); |
| v_running_avg_y = _mm_adds_epu8(v_running_avg_y, nadj); |
| _mm_storeu_si128((__m128i *)running_avg_y, v_running_avg_y); |
| |
| // Accumulate the adjustments. |
| acc_diff = _mm_subs_epi8(acc_diff, padj); |
| acc_diff = _mm_adds_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; |
| } |
| abs_sum_diff = abs_sum_diff_16x1(acc_diff); |
| if (abs_sum_diff > sum_diff_thresh) { |
| return COPY_BLOCK; |
| } |
| } else { |
| return COPY_BLOCK; |
| } |
| } |
| } |
| |
| vp8_copy_mem16x16(running_avg_y_start, avg_y_stride, sig_start, sig_stride); |
| return FILTER_BLOCK; |
| } |
| |
| int vp8_denoiser_filter_uv_sse2(unsigned char *mc_running_avg, |
| int mc_avg_stride, |
| unsigned char *running_avg, int avg_stride, |
| unsigned char *sig, int sig_stride, |
| unsigned int motion_magnitude, |
| int increase_denoising) { |
| unsigned char *running_avg_start = running_avg; |
| unsigned char *sig_start = sig; |
| int sum_diff_thresh; |
| int r; |
| int shift_inc = (increase_denoising && |
| motion_magnitude <= MOTION_MAGNITUDE_THRESHOLD_UV) ? 1 : 0; |
| __m128i acc_diff = _mm_setzero_si128(); |
| const __m128i k_0 = _mm_setzero_si128(); |
| const __m128i k_4 = _mm_set1_epi8(4 + shift_inc); |
| 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_UV) ? |
| 7 + shift_inc : 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); |
| |
| { |
| const __m128i k_1 = _mm_set1_epi16(1); |
| __m128i vec_sum_block = _mm_setzero_si128(); |
| |
| // Avoid denoising color signal if its close to average level. |
| for (r = 0; r < 8; ++r) { |
| const __m128i v_sig = _mm_loadl_epi64((__m128i *)(&sig[0])); |
| const __m128i v_sig_unpack = _mm_unpacklo_epi8(v_sig, k_0); |
| vec_sum_block = _mm_add_epi16(vec_sum_block, v_sig_unpack); |
| sig += sig_stride; |
| } |
| sig -= sig_stride * 8; |
| { |
| const __m128i hg_fe_dc_ba = _mm_madd_epi16(vec_sum_block, k_1); |
| const __m128i hgfe_dcba = _mm_add_epi32(hg_fe_dc_ba, |
| _mm_srli_si128(hg_fe_dc_ba, 8)); |
| const __m128i hgfedcba = _mm_add_epi32(hgfe_dcba, |
| _mm_srli_si128(hgfe_dcba, 4)); |
| const int sum_block = _mm_cvtsi128_si32(hgfedcba); |
| if (abs(sum_block - (128 * 8 * 8)) < SUM_DIFF_FROM_AVG_THRESH_UV) { |
| return COPY_BLOCK; |
| } |
| } |
| } |
| |
| for (r = 0; r < 4; ++r) { |
| /* Calculate differences */ |
| const __m128i v_sig_low = _mm_castpd_si128( |
| _mm_load_sd((double *)(&sig[0]))); |
| const __m128i v_sig = _mm_castpd_si128( |
| _mm_loadh_pd(_mm_castsi128_pd(v_sig_low), |
| (double *)(&sig[sig_stride]))); |
| const __m128i v_mc_running_avg_low = _mm_castpd_si128( |
| _mm_load_sd((double *)(&mc_running_avg[0]))); |
| const __m128i v_mc_running_avg = _mm_castpd_si128( |
| _mm_loadh_pd(_mm_castsi128_pd(v_mc_running_avg_low), |
| (double *)(&mc_running_avg[mc_avg_stride]))); |
| const __m128i pdiff = _mm_subs_epu8(v_mc_running_avg, v_sig); |
| const __m128i ndiff = _mm_subs_epu8(v_sig, v_mc_running_avg); |
| /* 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; |
| __m128i v_running_avg; |
| |
| /* 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 = _mm_adds_epu8(v_sig, padj); |
| v_running_avg = _mm_subs_epu8(v_running_avg, nadj); |
| |
| _mm_storel_pd((double *)&running_avg[0], |
| _mm_castsi128_pd(v_running_avg)); |
| _mm_storeh_pd((double *)&running_avg[avg_stride], |
| _mm_castsi128_pd(v_running_avg)); |
| |
| /* 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 * 2; |
| mc_running_avg += mc_avg_stride * 2; |
| running_avg += avg_stride * 2; |
| } |
| |
| { |
| unsigned int abs_sum_diff = abs_sum_diff_16x1(acc_diff); |
| sum_diff_thresh = SUM_DIFF_THRESHOLD_UV; |
| if (increase_denoising) sum_diff_thresh = SUM_DIFF_THRESHOLD_HIGH_UV; |
| if (abs_sum_diff > sum_diff_thresh) { |
| // Before returning to copy the block (i.e., apply no denoising), |
| // checK if we can still apply some (weaker) temporal filtering to |
| // this block, that would otherwise not be denoised at all. Simplest |
| // is to apply an additional adjustment to running_avg_y to bring it |
| // closer to sig. The adjustment is capped by a maximum delta, and |
| // chosen such that in most cases the resulting sum_diff will be |
| // within the accceptable range given by sum_diff_thresh. |
| |
| // The delta is set by the excess of absolute pixel diff over the |
| // threshold. |
| int delta = ((abs_sum_diff - sum_diff_thresh) >> 8) + 1; |
| // Only apply the adjustment for max delta up to 3. |
| if (delta < 4) { |
| const __m128i k_delta = _mm_set1_epi8(delta); |
| sig -= sig_stride * 8; |
| mc_running_avg -= mc_avg_stride * 8; |
| running_avg -= avg_stride * 8; |
| for (r = 0; r < 4; ++r) { |
| // Calculate differences. |
| const __m128i v_sig_low = _mm_castpd_si128( |
| _mm_load_sd((double *)(&sig[0]))); |
| const __m128i v_sig = _mm_castpd_si128( |
| _mm_loadh_pd(_mm_castsi128_pd(v_sig_low), |
| (double *)(&sig[sig_stride]))); |
| const __m128i v_mc_running_avg_low = _mm_castpd_si128( |
| _mm_load_sd((double *)(&mc_running_avg[0]))); |
| const __m128i v_mc_running_avg = _mm_castpd_si128( |
| _mm_loadh_pd(_mm_castsi128_pd(v_mc_running_avg_low), |
| (double *)(&mc_running_avg[mc_avg_stride]))); |
| const __m128i pdiff = _mm_subs_epu8(v_mc_running_avg, v_sig); |
| const __m128i ndiff = _mm_subs_epu8(v_sig, v_mc_running_avg); |
| // Obtain the sign. FF if diff is negative. |
| const __m128i diff_sign = _mm_cmpeq_epi8(pdiff, k_0); |
| // Clamp absolute difference to delta to get the adjustment. |
| const __m128i adj = |
| _mm_min_epu8(_mm_or_si128(pdiff, ndiff), k_delta); |
| // Restore the sign and get positive and negative adjustments. |
| __m128i padj, nadj; |
| const __m128i v_running_avg_low = _mm_castpd_si128( |
| _mm_load_sd((double *)(&running_avg[0]))); |
| __m128i v_running_avg = _mm_castpd_si128( |
| _mm_loadh_pd(_mm_castsi128_pd(v_running_avg_low), |
| (double *)(&running_avg[avg_stride]))); |
| padj = _mm_andnot_si128(diff_sign, adj); |
| nadj = _mm_and_si128(diff_sign, adj); |
| // Calculate filtered value. |
| v_running_avg = _mm_subs_epu8(v_running_avg, padj); |
| v_running_avg = _mm_adds_epu8(v_running_avg, nadj); |
| |
| _mm_storel_pd((double *)&running_avg[0], |
| _mm_castsi128_pd(v_running_avg)); |
| _mm_storeh_pd((double *)&running_avg[avg_stride], |
| _mm_castsi128_pd(v_running_avg)); |
| |
| // Accumulate the adjustments. |
| acc_diff = _mm_subs_epi8(acc_diff, padj); |
| acc_diff = _mm_adds_epi8(acc_diff, nadj); |
| |
| // Update pointers for next iteration. |
| sig += sig_stride * 2; |
| mc_running_avg += mc_avg_stride * 2; |
| running_avg += avg_stride * 2; |
| } |
| abs_sum_diff = abs_sum_diff_16x1(acc_diff); |
| if (abs_sum_diff > sum_diff_thresh) { |
| return COPY_BLOCK; |
| } |
| } else { |
| return COPY_BLOCK; |
| } |
| } |
| } |
| |
| vp8_copy_mem8x8(running_avg_start, avg_stride, sig_start, sig_stride); |
| return FILTER_BLOCK; |
| } |
