| /* |
| * Copyright (c) 2015 The WebRTC 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 <emmintrin.h> |
| #include "webrtc/modules/video_processing/util/denoiser_filter_sse2.h" |
| |
| namespace webrtc { |
| |
| static void Get8x8varSse2(const uint8_t* src, |
| int src_stride, |
| const uint8_t* ref, |
| int ref_stride, |
| unsigned int* sse, |
| int* sum) { |
| const __m128i zero = _mm_setzero_si128(); |
| __m128i vsum = _mm_setzero_si128(); |
| __m128i vsse = _mm_setzero_si128(); |
| |
| for (int i = 0; i < 8; i += 2) { |
| const __m128i src0 = _mm_unpacklo_epi8( |
| _mm_loadl_epi64((const __m128i*)(src + i * src_stride)), zero); |
| const __m128i ref0 = _mm_unpacklo_epi8( |
| _mm_loadl_epi64((const __m128i*)(ref + i * ref_stride)), zero); |
| const __m128i diff0 = _mm_sub_epi16(src0, ref0); |
| |
| const __m128i src1 = _mm_unpacklo_epi8( |
| _mm_loadl_epi64((const __m128i*)(src + (i + 1) * src_stride)), zero); |
| const __m128i ref1 = _mm_unpacklo_epi8( |
| _mm_loadl_epi64((const __m128i*)(ref + (i + 1) * ref_stride)), zero); |
| const __m128i diff1 = _mm_sub_epi16(src1, ref1); |
| |
| vsum = _mm_add_epi16(vsum, diff0); |
| vsum = _mm_add_epi16(vsum, diff1); |
| vsse = _mm_add_epi32(vsse, _mm_madd_epi16(diff0, diff0)); |
| vsse = _mm_add_epi32(vsse, _mm_madd_epi16(diff1, diff1)); |
| } |
| |
| // sum |
| vsum = _mm_add_epi16(vsum, _mm_srli_si128(vsum, 8)); |
| vsum = _mm_add_epi16(vsum, _mm_srli_si128(vsum, 4)); |
| vsum = _mm_add_epi16(vsum, _mm_srli_si128(vsum, 2)); |
| *sum = static_cast<int16_t>(_mm_extract_epi16(vsum, 0)); |
| |
| // sse |
| vsse = _mm_add_epi32(vsse, _mm_srli_si128(vsse, 8)); |
| vsse = _mm_add_epi32(vsse, _mm_srli_si128(vsse, 4)); |
| *sse = _mm_cvtsi128_si32(vsse); |
| } |
| |
| static void VarianceSSE2(const unsigned char* src, |
| int src_stride, |
| const unsigned char* ref, |
| int ref_stride, |
| int w, |
| int h, |
| uint32_t* sse, |
| int64_t* sum, |
| int block_size) { |
| *sse = 0; |
| *sum = 0; |
| |
| for (int i = 0; i < h; i += block_size) { |
| for (int j = 0; j < w; j += block_size) { |
| uint32_t sse0 = 0; |
| int32_t sum0 = 0; |
| |
| Get8x8varSse2(src + src_stride * i + j, src_stride, |
| ref + ref_stride * i + j, ref_stride, &sse0, &sum0); |
| *sse += sse0; |
| *sum += sum0; |
| } |
| } |
| } |
| |
| // Compute the sum of all pixel differences of this MB. |
| static uint32_t AbsSumDiff16x1(__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 = abs(_mm_cvtsi128_si32(hgfedcba)); |
| |
| return sum_diff; |
| } |
| |
| // TODO(jackychen): Optimize this function using SSE2. |
| void DenoiserFilterSSE2::CopyMem16x16(const uint8_t* src, |
| int src_stride, |
| uint8_t* dst, |
| int dst_stride) { |
| for (int i = 0; i < 16; i++) { |
| memcpy(dst, src, 16); |
| src += src_stride; |
| dst += dst_stride; |
| } |
| } |
| |
| uint32_t DenoiserFilterSSE2::Variance16x8(const uint8_t* src, |
| int src_stride, |
| const uint8_t* ref, |
| int ref_stride, |
| uint32_t* sse) { |
| int64_t sum = 0; |
| VarianceSSE2(src, src_stride << 1, ref, ref_stride << 1, 16, 8, sse, &sum, 8); |
| return *sse - ((sum * sum) >> 7); |
| } |
| |
| DenoiserDecision DenoiserFilterSSE2::MbDenoise(const uint8_t* mc_running_avg_y, |
| int mc_avg_y_stride, |
| uint8_t* running_avg_y, |
| int avg_y_stride, |
| const uint8_t* sig, |
| int sig_stride, |
| uint8_t motion_magnitude, |
| int increase_denoising) { |
| DenoiserDecision decision = FILTER_BLOCK; |
| unsigned int sum_diff_thresh = 0; |
| int shift_inc = |
| (increase_denoising && motion_magnitude <= kMotionMagnitudeThreshold) ? 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 <= kMotionMagnitudeThreshold) ? 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 (int r = 0; r < 16; ++r) { |
| // Calculate differences. |
| const __m128i v_sig = |
| _mm_loadu_si128(reinterpret_cast<const __m128i*>(&sig[0])); |
| const __m128i v_mc_running_avg_y = |
| _mm_loadu_si128(reinterpret_cast<const __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(reinterpret_cast<__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 = AbsSumDiff16x1(acc_diff); |
| sum_diff_thresh = |
| increase_denoising ? kSumDiffThresholdHigh : kSumDiffThreshold; |
| if (abs_sum_diff > sum_diff_thresh) |
| decision = COPY_BLOCK; |
| return decision; |
| } |
| |
| } // namespace webrtc |