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368 lines
16 KiB
C
368 lines
16 KiB
C
/*****************************************************************************
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* This file is part of Kvazaar HEVC encoder.
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*
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* Copyright (C) 2013-2015 Tampere University of Technology and others (see
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* COPYING file).
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*
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* Kvazaar is free software: you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation; either version 2.1 of the License, or (at your
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* option) any later version.
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*
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* Kvazaar is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with Kvazaar. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************************/
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#include "strategies/avx2/sao-avx2.h"
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#if COMPILE_INTEL_AVX2
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#include <immintrin.h>
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#include "cu.h"
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#include "encoder.h"
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#include "encoderstate.h"
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#include "kvazaar.h"
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#include "sao.h"
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#include "strategyselector.h"
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// These optimizations are based heavily on sao-generic.c.
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// Might be useful to check that if (when) this file
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// is difficult to understand.
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static INLINE __m128i load_6_pixels(const kvz_pixel* data)
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{
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return _mm_insert_epi16(_mm_cvtsi32_si128(*(int32_t*)&(data[0])), *(int16_t*)&(data[4]), 2);
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}
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static INLINE __m256i load_5_offsets(const int* offsets)
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{
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return _mm256_inserti128_si256(_mm256_castsi128_si256(_mm_loadu_si128((__m128i*) offsets)), _mm_insert_epi32(_mm_setzero_si128(), offsets[4], 0), 1);
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}
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static __m128i sao_calc_eo_cat_avx2(__m128i* a, __m128i* b, __m128i* c)
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{
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__m128i v_eo_idx = _mm_set1_epi16(2);
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__m128i v_a = _mm_cvtepu8_epi16(*a);
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__m128i v_c = _mm_cvtepu8_epi16(*c);
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__m128i v_b = _mm_cvtepu8_epi16(*b);
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__m128i temp_a = _mm_sign_epi16(_mm_set1_epi16(1), _mm_sub_epi16(v_c, v_a));
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__m128i temp_b = _mm_sign_epi16(_mm_set1_epi16(1), _mm_sub_epi16(v_c, v_b));
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v_eo_idx = _mm_add_epi16(v_eo_idx, temp_a);
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v_eo_idx = _mm_add_epi16(v_eo_idx, temp_b);
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v_eo_idx = _mm_packus_epi16(v_eo_idx, v_eo_idx);
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__m128i v_cat_lookup = _mm_setr_epi8(1,2,0,3,4,0,0,0,0,0,0,0,0,0,0,0);
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__m128i v_cat = _mm_shuffle_epi8(v_cat_lookup, v_eo_idx);
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return v_cat;
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}
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static int sao_edge_ddistortion_avx2(const kvz_pixel *orig_data,
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const kvz_pixel *rec_data,
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int block_width,
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int block_height,
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int eo_class,
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int offsets[NUM_SAO_EDGE_CATEGORIES])
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{
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int y, x;
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int sum = 0;
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vector2d_t a_ofs = g_sao_edge_offsets[eo_class][0];
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vector2d_t b_ofs = g_sao_edge_offsets[eo_class][1];
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__m256i v_accum = { 0 };
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for (y = 1; y < block_height - 1; ++y) {
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for (x = 1; x < block_width - 8; x+=8) {
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const kvz_pixel *c_data = &rec_data[y * block_width + x];
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__m128i v_c_data = _mm_loadl_epi64((__m128i*)c_data);
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__m128i v_a = _mm_loadl_epi64((__m128i*)(&c_data[a_ofs.y * block_width + a_ofs.x]));
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__m128i v_c = v_c_data;
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__m128i v_b = _mm_loadl_epi64((__m128i*)(&c_data[b_ofs.y * block_width + b_ofs.x]));
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__m256i v_cat = _mm256_cvtepu8_epi32(sao_calc_eo_cat_avx2(&v_a, &v_b, &v_c));
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__m256i v_offset = load_5_offsets(offsets);
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v_offset = _mm256_permutevar8x32_epi32(v_offset, v_cat);
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__m256i v_diff = _mm256_cvtepu8_epi32(_mm_loadl_epi64((__m128i*)&(orig_data[y * block_width + x])));
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v_diff = _mm256_sub_epi32(v_diff, _mm256_cvtepu8_epi32(v_c));
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__m256i v_diff_minus_offset = _mm256_sub_epi32(v_diff, v_offset);
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__m256i v_temp_sum = _mm256_sub_epi32(_mm256_mullo_epi32(v_diff_minus_offset, v_diff_minus_offset), _mm256_mullo_epi32(v_diff, v_diff));
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v_accum = _mm256_add_epi32(v_accum, v_temp_sum);
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}
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//Handle last 6 pixels separately to prevent reading over boundary
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const kvz_pixel *c_data = &rec_data[y * block_width + x];
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__m128i v_c_data = load_6_pixels(c_data);
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const kvz_pixel* a_ptr = &c_data[a_ofs.y * block_width + a_ofs.x];
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const kvz_pixel* b_ptr = &c_data[b_ofs.y * block_width + b_ofs.x];
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__m128i v_a = load_6_pixels(a_ptr);
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__m128i v_c = v_c_data;
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__m128i v_b = load_6_pixels(b_ptr);
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__m256i v_cat = _mm256_cvtepu8_epi32(sao_calc_eo_cat_avx2(&v_a, &v_b, &v_c));
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__m256i v_offset = load_5_offsets(offsets);
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v_offset = _mm256_permutevar8x32_epi32(v_offset, v_cat);
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const kvz_pixel* orig_ptr = &(orig_data[y * block_width + x]);
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__m256i v_diff = _mm256_cvtepu8_epi32(load_6_pixels(orig_ptr));
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v_diff = _mm256_sub_epi32(v_diff, _mm256_cvtepu8_epi32(v_c));
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__m256i v_diff_minus_offset = _mm256_sub_epi32(v_diff, v_offset);
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__m256i v_temp_sum = _mm256_sub_epi32(_mm256_mullo_epi32(v_diff_minus_offset, v_diff_minus_offset), _mm256_mullo_epi32(v_diff, v_diff));
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v_accum = _mm256_add_epi32(v_accum, v_temp_sum);
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}
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//Full horizontal sum
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v_accum = _mm256_add_epi32(v_accum, _mm256_castsi128_si256(_mm256_extracti128_si256(v_accum, 1)));
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v_accum = _mm256_add_epi32(v_accum, _mm256_shuffle_epi32(v_accum, _MM_SHUFFLE(1, 0, 3, 2)));
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v_accum = _mm256_add_epi32(v_accum, _mm256_shuffle_epi32(v_accum, _MM_SHUFFLE(0, 1, 0, 1)));
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sum += _mm_cvtsi128_si32(_mm256_castsi256_si128(v_accum));
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return sum;
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}
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static INLINE void accum_count_eo_cat_avx2(__m256i* __restrict v_diff_accum,
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__m256i* __restrict v_count,
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__m256i* __restrict v_cat,
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__m256i* __restrict v_diff,
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int eo_cat)
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{
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__m256i v_mask = _mm256_cmpeq_epi32(*v_cat, _mm256_set1_epi32(eo_cat));
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*v_diff_accum = _mm256_add_epi32(*v_diff_accum, _mm256_and_si256(*v_diff, v_mask));
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*v_count = _mm256_sub_epi32(*v_count, v_mask);
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}
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#define ACCUM_COUNT_EO_CAT_AVX2(EO_CAT, V_CAT) \
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\
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accum_count_eo_cat_avx2(&(v_diff_accum[ EO_CAT ]), &(v_count[ EO_CAT ]), &V_CAT , &v_diff, EO_CAT);
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static void calc_sao_edge_dir_avx2(const kvz_pixel *orig_data,
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const kvz_pixel *rec_data,
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int eo_class,
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int block_width,
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int block_height,
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int cat_sum_cnt[2][NUM_SAO_EDGE_CATEGORIES])
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{
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int y, x;
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vector2d_t a_ofs = g_sao_edge_offsets[eo_class][0];
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vector2d_t b_ofs = g_sao_edge_offsets[eo_class][1];
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// Don't sample the edge pixels because this function doesn't have access to
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// their neighbours.
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__m256i v_diff_accum[NUM_SAO_EDGE_CATEGORIES] = { { 0 } };
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__m256i v_count[NUM_SAO_EDGE_CATEGORIES] = { { 0 } };
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for (y = 1; y < block_height - 1; ++y) {
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//Calculation for 8 pixels per round
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for (x = 1; x < block_width - 8; x += 8) {
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const kvz_pixel *c_data = &rec_data[y * block_width + x];
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__m128i v_c_data = _mm_loadl_epi64((__m128i* __restrict)c_data);
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__m128i v_a = _mm_loadl_epi64((__m128i* __restrict)(&c_data[a_ofs.y * block_width + a_ofs.x]));
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__m128i v_c = v_c_data;
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__m128i v_b = _mm_loadl_epi64((__m128i* __restrict)(&c_data[b_ofs.y * block_width + b_ofs.x]));
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__m256i v_cat = _mm256_cvtepu8_epi32(sao_calc_eo_cat_avx2(&v_a, &v_b, &v_c));
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__m256i v_diff = _mm256_cvtepu8_epi32(_mm_loadl_epi64((__m128i* __restrict)&(orig_data[y * block_width + x])));
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v_diff = _mm256_sub_epi32(v_diff, _mm256_cvtepu8_epi32(v_c));
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//Accumulate differences and occurrences for each category
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ACCUM_COUNT_EO_CAT_AVX2(SAO_EO_CAT0, v_cat);
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ACCUM_COUNT_EO_CAT_AVX2(SAO_EO_CAT1, v_cat);
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ACCUM_COUNT_EO_CAT_AVX2(SAO_EO_CAT2, v_cat);
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ACCUM_COUNT_EO_CAT_AVX2(SAO_EO_CAT3, v_cat);
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ACCUM_COUNT_EO_CAT_AVX2(SAO_EO_CAT4, v_cat);
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}
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//Handle last 6 pixels separately to prevent reading over boundary
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const kvz_pixel *c_data = &rec_data[y * block_width + x];
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__m128i v_c_data = load_6_pixels(c_data);
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const kvz_pixel* a_ptr = &c_data[a_ofs.y * block_width + a_ofs.x];
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const kvz_pixel* b_ptr = &c_data[b_ofs.y * block_width + b_ofs.x];
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__m128i v_a = load_6_pixels(a_ptr);
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__m128i v_c = v_c_data;
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__m128i v_b = load_6_pixels(b_ptr);
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__m256i v_cat = _mm256_cvtepu8_epi32(sao_calc_eo_cat_avx2(&v_a, &v_b, &v_c));
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//Set the last two elements to a non-existing category to cause
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//the accumulate-count macro to discard those values.
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__m256i v_mask = _mm256_setr_epi32(0, 0, 0, 0, 0, 0, -1, -1);
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v_cat = _mm256_or_si256(v_cat, v_mask);
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const kvz_pixel* orig_ptr = &(orig_data[y * block_width + x]);
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__m256i v_diff = _mm256_cvtepu8_epi32(load_6_pixels(orig_ptr));
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v_diff = _mm256_sub_epi32(v_diff, _mm256_cvtepu8_epi32(v_c));
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//Accumulate differences and occurrences for each category
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ACCUM_COUNT_EO_CAT_AVX2(SAO_EO_CAT0, v_cat);
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ACCUM_COUNT_EO_CAT_AVX2(SAO_EO_CAT1, v_cat);
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ACCUM_COUNT_EO_CAT_AVX2(SAO_EO_CAT2, v_cat);
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ACCUM_COUNT_EO_CAT_AVX2(SAO_EO_CAT3, v_cat);
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ACCUM_COUNT_EO_CAT_AVX2(SAO_EO_CAT4, v_cat);
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}
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for (int eo_cat = 0; eo_cat < NUM_SAO_EDGE_CATEGORIES; ++eo_cat) {
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int accum = 0;
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int count = 0;
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//Full horizontal sum of accumulated values
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v_diff_accum[eo_cat] = _mm256_add_epi32(v_diff_accum[eo_cat], _mm256_castsi128_si256(_mm256_extracti128_si256(v_diff_accum[eo_cat], 1)));
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v_diff_accum[eo_cat] = _mm256_add_epi32(v_diff_accum[eo_cat], _mm256_shuffle_epi32(v_diff_accum[eo_cat], _MM_SHUFFLE(1, 0, 3, 2)));
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v_diff_accum[eo_cat] = _mm256_add_epi32(v_diff_accum[eo_cat], _mm256_shuffle_epi32(v_diff_accum[eo_cat], _MM_SHUFFLE(0, 1, 0, 1)));
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accum += _mm_cvtsi128_si32(_mm256_castsi256_si128(v_diff_accum[eo_cat]));
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//Full horizontal sum of accumulated values
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v_count[eo_cat] = _mm256_add_epi32(v_count[eo_cat], _mm256_castsi128_si256(_mm256_extracti128_si256(v_count[eo_cat], 1)));
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v_count[eo_cat] = _mm256_add_epi32(v_count[eo_cat], _mm256_shuffle_epi32(v_count[eo_cat], _MM_SHUFFLE(1, 0, 3, 2)));
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v_count[eo_cat] = _mm256_add_epi32(v_count[eo_cat], _mm256_shuffle_epi32(v_count[eo_cat], _MM_SHUFFLE(0, 1, 0, 1)));
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count += _mm_cvtsi128_si32(_mm256_castsi256_si128(v_count[eo_cat]));
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cat_sum_cnt[0][eo_cat] += accum;
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cat_sum_cnt[1][eo_cat] += count;
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}
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}
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static void sao_reconstruct_color_avx2(const encoder_control_t * const encoder,
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const kvz_pixel *rec_data, kvz_pixel *new_rec_data,
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const sao_info_t *sao,
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int stride, int new_stride,
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int block_width, int block_height,
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color_t color_i)
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{
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// Arrays orig_data and rec_data are quarter size for chroma.
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int offset_v = color_i == COLOR_V ? 5 : 0;
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if (sao->type == SAO_TYPE_BAND) {
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int offsets[1 << KVZ_BIT_DEPTH];
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kvz_calc_sao_offset_array(encoder, sao, offsets, color_i);
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for (int y = 0; y < block_height; ++y) {
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for (int x = 0; x < block_width; ++x) {
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new_rec_data[y * new_stride + x] = offsets[rec_data[y * stride + x]];
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}
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}
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} else {
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// Don't sample the edge pixels because this function doesn't have access to
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// their neighbours.
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for (int y = 0; y < block_height; ++y) {
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for (int x = 0; x < block_width; x+=8) {
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vector2d_t a_ofs = g_sao_edge_offsets[sao->eo_class][0];
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vector2d_t b_ofs = g_sao_edge_offsets[sao->eo_class][1];
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const kvz_pixel *c_data = &rec_data[y * stride + x];
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kvz_pixel *new_data = &new_rec_data[y * new_stride + x];
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const kvz_pixel* a_ptr = &c_data[a_ofs.y * stride + a_ofs.x];
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const kvz_pixel* c_ptr = &c_data[0];
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const kvz_pixel* b_ptr = &c_data[b_ofs.y * stride + b_ofs.x];
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__m128i v_a = _mm_loadl_epi64((__m128i*)a_ptr);
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__m128i v_b = _mm_loadl_epi64((__m128i*)b_ptr);
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__m128i v_c = _mm_loadl_epi64((__m128i*)c_ptr);
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__m256i v_cat = _mm256_cvtepu8_epi32(sao_calc_eo_cat_avx2(&v_a, &v_b, &v_c) );
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__m256i v_offset_v = load_5_offsets(sao->offsets + offset_v);
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__m256i v_new_data = _mm256_permutevar8x32_epi32(v_offset_v, v_cat);
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v_new_data = _mm256_add_epi32(v_new_data, _mm256_cvtepu8_epi32(v_c));
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__m128i v_new_data_128 = _mm_packus_epi32(_mm256_castsi256_si128(v_new_data), _mm256_extracti128_si256(v_new_data, 1));
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v_new_data_128 = _mm_packus_epi16(v_new_data_128, v_new_data_128);
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if ((block_width - x) >= 8) {
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_mm_storel_epi64((__m128i*)new_data, v_new_data_128);
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} else {
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kvz_pixel arr[8];
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_mm_storel_epi64((__m128i*)arr, v_new_data_128);
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for (int i = 0; i < block_width - x; ++i) new_data[i] = arr[i];
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}
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}
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}
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}
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}
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static int sao_band_ddistortion_avx2(const encoder_state_t * const state,
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const kvz_pixel *orig_data,
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const kvz_pixel *rec_data,
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int block_width,
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int block_height,
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int band_pos,
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int sao_bands[4])
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{
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int y, x;
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int shift = state->encoder_control->bitdepth-5;
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int sum = 0;
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__m256i v_accum = { 0 };
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for (y = 0; y < block_height; ++y) {
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for (x = 0; x < block_width; x+=8) {
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__m256i v_band = _mm256_cvtepu8_epi32(_mm_loadl_epi64((__m128i*)&(rec_data[y * block_width + x])));
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v_band = _mm256_srli_epi32(v_band, shift);
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v_band = _mm256_sub_epi32(v_band, _mm256_set1_epi32(band_pos));
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__m256i v_offset = { 0 };
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__m256i v_mask = _mm256_cmpeq_epi32(_mm256_and_si256(_mm256_set1_epi32(~3), v_band), _mm256_setzero_si256());
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v_offset = _mm256_permutevar8x32_epi32(_mm256_castsi128_si256(_mm_loadu_si128((__m128i*)sao_bands)), v_band);
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v_offset = _mm256_and_si256(v_offset, v_mask);
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__m256i v_diff = _mm256_cvtepu8_epi32(_mm_loadl_epi64((__m128i*)&(orig_data[y * block_width + x])));
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__m256i v_rec = _mm256_cvtepu8_epi32(_mm_loadl_epi64((__m128i*)&(rec_data[y * block_width + x])));
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v_diff = _mm256_sub_epi32(v_diff, v_rec);
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__m256i v_diff_minus_offset = _mm256_sub_epi32(v_diff, v_offset);
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__m256i v_temp_sum = _mm256_sub_epi32(_mm256_mullo_epi32(v_diff_minus_offset, v_diff_minus_offset), _mm256_mullo_epi32(v_diff, v_diff));
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|
v_accum = _mm256_add_epi32(v_accum, v_temp_sum);
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|
}
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|
}
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|
|
|
//Full horizontal sum
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|
v_accum = _mm256_add_epi32(v_accum, _mm256_castsi128_si256(_mm256_extracti128_si256(v_accum, 1)));
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|
v_accum = _mm256_add_epi32(v_accum, _mm256_shuffle_epi32(v_accum, _MM_SHUFFLE(1, 0, 3, 2)));
|
|
v_accum = _mm256_add_epi32(v_accum, _mm256_shuffle_epi32(v_accum, _MM_SHUFFLE(0, 1, 0, 1)));
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|
sum += _mm_cvtsi128_si32(_mm256_castsi256_si128(v_accum));
|
|
|
|
return sum;
|
|
}
|
|
|
|
#endif //COMPILE_INTEL_AVX2
|
|
|
|
int kvz_strategy_register_sao_avx2(void* opaque, uint8_t bitdepth)
|
|
{
|
|
bool success = true;
|
|
#if COMPILE_INTEL_AVX2
|
|
if (bitdepth == 8) {
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|
success &= kvz_strategyselector_register(opaque, "sao_edge_ddistortion", "avx2", 40, &sao_edge_ddistortion_avx2);
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|
success &= kvz_strategyselector_register(opaque, "calc_sao_edge_dir", "avx2", 40, &calc_sao_edge_dir_avx2);
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|
success &= kvz_strategyselector_register(opaque, "sao_reconstruct_color", "avx2", 40, &sao_reconstruct_color_avx2);
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|
success &= kvz_strategyselector_register(opaque, "sao_band_ddistortion", "avx2", 40, &sao_band_ddistortion_avx2);
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|
}
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|
#endif //COMPILE_INTEL_AVX2
|
|
return success;
|
|
}
|