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Diffstat (limited to 'media/libaom/src/av1/encoder/pickcdef.c')
| -rw-r--r-- | media/libaom/src/av1/encoder/pickcdef.c | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/media/libaom/src/av1/encoder/pickcdef.c b/media/libaom/src/av1/encoder/pickcdef.c new file mode 100644 index 000000000..6d154a7d2 --- /dev/null +++ b/media/libaom/src/av1/encoder/pickcdef.c @@ -0,0 +1,526 @@ +/* + * Copyright (c) 2016, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#include <math.h> +#include <string.h> + +#include "config/aom_scale_rtcd.h" + +#include "aom/aom_integer.h" +#include "av1/common/cdef.h" +#include "av1/common/onyxc_int.h" +#include "av1/common/reconinter.h" +#include "av1/encoder/encoder.h" + +#define REDUCED_PRI_STRENGTHS 8 +#define REDUCED_TOTAL_STRENGTHS (REDUCED_PRI_STRENGTHS * CDEF_SEC_STRENGTHS) +#define TOTAL_STRENGTHS (CDEF_PRI_STRENGTHS * CDEF_SEC_STRENGTHS) + +static int priconv[REDUCED_PRI_STRENGTHS] = { 0, 1, 2, 3, 5, 7, 10, 13 }; + +/* Search for the best strength to add as an option, knowing we + already selected nb_strengths options. */ +static uint64_t search_one(int *lev, int nb_strengths, + uint64_t mse[][TOTAL_STRENGTHS], int sb_count, + int fast) { + uint64_t tot_mse[TOTAL_STRENGTHS]; + const int total_strengths = fast ? REDUCED_TOTAL_STRENGTHS : TOTAL_STRENGTHS; + int i, j; + uint64_t best_tot_mse = (uint64_t)1 << 63; + int best_id = 0; + memset(tot_mse, 0, sizeof(tot_mse)); + for (i = 0; i < sb_count; i++) { + int gi; + uint64_t best_mse = (uint64_t)1 << 63; + /* Find best mse among already selected options. */ + for (gi = 0; gi < nb_strengths; gi++) { + if (mse[i][lev[gi]] < best_mse) { + best_mse = mse[i][lev[gi]]; + } + } + /* Find best mse when adding each possible new option. */ + for (j = 0; j < total_strengths; j++) { + uint64_t best = best_mse; + if (mse[i][j] < best) best = mse[i][j]; + tot_mse[j] += best; + } + } + for (j = 0; j < total_strengths; j++) { + if (tot_mse[j] < best_tot_mse) { + best_tot_mse = tot_mse[j]; + best_id = j; + } + } + lev[nb_strengths] = best_id; + return best_tot_mse; +} + +/* Search for the best luma+chroma strength to add as an option, knowing we + already selected nb_strengths options. */ +static uint64_t search_one_dual(int *lev0, int *lev1, int nb_strengths, + uint64_t (**mse)[TOTAL_STRENGTHS], int sb_count, + int fast) { + uint64_t tot_mse[TOTAL_STRENGTHS][TOTAL_STRENGTHS]; + int i, j; + uint64_t best_tot_mse = (uint64_t)1 << 63; + int best_id0 = 0; + int best_id1 = 0; + const int total_strengths = fast ? REDUCED_TOTAL_STRENGTHS : TOTAL_STRENGTHS; + memset(tot_mse, 0, sizeof(tot_mse)); + for (i = 0; i < sb_count; i++) { + int gi; + uint64_t best_mse = (uint64_t)1 << 63; + /* Find best mse among already selected options. */ + for (gi = 0; gi < nb_strengths; gi++) { + uint64_t curr = mse[0][i][lev0[gi]]; + curr += mse[1][i][lev1[gi]]; + if (curr < best_mse) { + best_mse = curr; + } + } + /* Find best mse when adding each possible new option. */ + for (j = 0; j < total_strengths; j++) { + int k; + for (k = 0; k < total_strengths; k++) { + uint64_t best = best_mse; + uint64_t curr = mse[0][i][j]; + curr += mse[1][i][k]; + if (curr < best) best = curr; + tot_mse[j][k] += best; + } + } + } + for (j = 0; j < total_strengths; j++) { + int k; + for (k = 0; k < total_strengths; k++) { + if (tot_mse[j][k] < best_tot_mse) { + best_tot_mse = tot_mse[j][k]; + best_id0 = j; + best_id1 = k; + } + } + } + lev0[nb_strengths] = best_id0; + lev1[nb_strengths] = best_id1; + return best_tot_mse; +} + +/* Search for the set of strengths that minimizes mse. */ +static uint64_t joint_strength_search(int *best_lev, int nb_strengths, + uint64_t mse[][TOTAL_STRENGTHS], + int sb_count, int fast) { + uint64_t best_tot_mse; + int i; + best_tot_mse = (uint64_t)1 << 63; + /* Greedy search: add one strength options at a time. */ + for (i = 0; i < nb_strengths; i++) { + best_tot_mse = search_one(best_lev, i, mse, sb_count, fast); + } + /* Trying to refine the greedy search by reconsidering each + already-selected option. */ + if (!fast) { + for (i = 0; i < 4 * nb_strengths; i++) { + int j; + for (j = 0; j < nb_strengths - 1; j++) best_lev[j] = best_lev[j + 1]; + best_tot_mse = + search_one(best_lev, nb_strengths - 1, mse, sb_count, fast); + } + } + return best_tot_mse; +} + +/* Search for the set of luma+chroma strengths that minimizes mse. */ +static uint64_t joint_strength_search_dual(int *best_lev0, int *best_lev1, + int nb_strengths, + uint64_t (**mse)[TOTAL_STRENGTHS], + int sb_count, int fast) { + uint64_t best_tot_mse; + int i; + best_tot_mse = (uint64_t)1 << 63; + /* Greedy search: add one strength options at a time. */ + for (i = 0; i < nb_strengths; i++) { + best_tot_mse = + search_one_dual(best_lev0, best_lev1, i, mse, sb_count, fast); + } + /* Trying to refine the greedy search by reconsidering each + already-selected option. */ + for (i = 0; i < 4 * nb_strengths; i++) { + int j; + for (j = 0; j < nb_strengths - 1; j++) { + best_lev0[j] = best_lev0[j + 1]; + best_lev1[j] = best_lev1[j + 1]; + } + best_tot_mse = search_one_dual(best_lev0, best_lev1, nb_strengths - 1, mse, + sb_count, fast); + } + return best_tot_mse; +} + +/* FIXME: SSE-optimize this. */ +static void copy_sb16_16(uint16_t *dst, int dstride, const uint16_t *src, + int src_voffset, int src_hoffset, int sstride, + int vsize, int hsize) { + int r, c; + const uint16_t *base = &src[src_voffset * sstride + src_hoffset]; + for (r = 0; r < vsize; r++) { + for (c = 0; c < hsize; c++) { + dst[r * dstride + c] = base[r * sstride + c]; + } + } +} + +static INLINE uint64_t dist_8x8_16bit(uint16_t *dst, int dstride, uint16_t *src, + int sstride, int coeff_shift) { + uint64_t svar = 0; + uint64_t dvar = 0; + uint64_t sum_s = 0; + uint64_t sum_d = 0; + uint64_t sum_s2 = 0; + uint64_t sum_d2 = 0; + uint64_t sum_sd = 0; + int i, j; + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + sum_s += src[i * sstride + j]; + sum_d += dst[i * dstride + j]; + sum_s2 += src[i * sstride + j] * src[i * sstride + j]; + sum_d2 += dst[i * dstride + j] * dst[i * dstride + j]; + sum_sd += src[i * sstride + j] * dst[i * dstride + j]; + } + } + /* Compute the variance -- the calculation cannot go negative. */ + svar = sum_s2 - ((sum_s * sum_s + 32) >> 6); + dvar = sum_d2 - ((sum_d * sum_d + 32) >> 6); + return (uint64_t)floor( + .5 + (sum_d2 + sum_s2 - 2 * sum_sd) * .5 * + (svar + dvar + (400 << 2 * coeff_shift)) / + (sqrt((20000 << 4 * coeff_shift) + svar * (double)dvar))); +} + +static INLINE uint64_t mse_8x8_16bit(uint16_t *dst, int dstride, uint16_t *src, + int sstride) { + uint64_t sum = 0; + int i, j; + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + int e = dst[i * dstride + j] - src[i * sstride + j]; + sum += e * e; + } + } + return sum; +} + +static INLINE uint64_t mse_4x4_16bit(uint16_t *dst, int dstride, uint16_t *src, + int sstride) { + uint64_t sum = 0; + int i, j; + for (i = 0; i < 4; i++) { + for (j = 0; j < 4; j++) { + int e = dst[i * dstride + j] - src[i * sstride + j]; + sum += e * e; + } + } + return sum; +} + +/* Compute MSE only on the blocks we filtered. */ +uint64_t compute_cdef_dist(uint16_t *dst, int dstride, uint16_t *src, + cdef_list *dlist, int cdef_count, BLOCK_SIZE bsize, + int coeff_shift, int pli) { + uint64_t sum = 0; + int bi, bx, by; + if (bsize == BLOCK_8X8) { + for (bi = 0; bi < cdef_count; bi++) { + by = dlist[bi].by; + bx = dlist[bi].bx; + if (pli == 0) { + sum += dist_8x8_16bit(&dst[(by << 3) * dstride + (bx << 3)], dstride, + &src[bi << (3 + 3)], 8, coeff_shift); + } else { + sum += mse_8x8_16bit(&dst[(by << 3) * dstride + (bx << 3)], dstride, + &src[bi << (3 + 3)], 8); + } + } + } else if (bsize == BLOCK_4X8) { + for (bi = 0; bi < cdef_count; bi++) { + by = dlist[bi].by; + bx = dlist[bi].bx; + sum += mse_4x4_16bit(&dst[(by << 3) * dstride + (bx << 2)], dstride, + &src[bi << (3 + 2)], 4); + sum += mse_4x4_16bit(&dst[((by << 3) + 4) * dstride + (bx << 2)], dstride, + &src[(bi << (3 + 2)) + 4 * 4], 4); + } + } else if (bsize == BLOCK_8X4) { + for (bi = 0; bi < cdef_count; bi++) { + by = dlist[bi].by; + bx = dlist[bi].bx; + sum += mse_4x4_16bit(&dst[(by << 2) * dstride + (bx << 3)], dstride, + &src[bi << (2 + 3)], 8); + sum += mse_4x4_16bit(&dst[(by << 2) * dstride + (bx << 3) + 4], dstride, + &src[(bi << (2 + 3)) + 4], 8); + } + } else { + assert(bsize == BLOCK_4X4); + for (bi = 0; bi < cdef_count; bi++) { + by = dlist[bi].by; + bx = dlist[bi].bx; + sum += mse_4x4_16bit(&dst[(by << 2) * dstride + (bx << 2)], dstride, + &src[bi << (2 + 2)], 4); + } + } + return sum >> 2 * coeff_shift; +} + +void av1_cdef_search(YV12_BUFFER_CONFIG *frame, const YV12_BUFFER_CONFIG *ref, + AV1_COMMON *cm, MACROBLOCKD *xd, int fast) { + int r, c; + int fbr, fbc; + uint16_t *src[3]; + uint16_t *ref_coeff[3]; + static cdef_list dlist[MI_SIZE_128X128 * MI_SIZE_128X128]; + int dir[CDEF_NBLOCKS][CDEF_NBLOCKS] = { { 0 } }; + int var[CDEF_NBLOCKS][CDEF_NBLOCKS] = { { 0 } }; + int stride[3]; + int bsize[3]; + int mi_wide_l2[3]; + int mi_high_l2[3]; + int xdec[3]; + int ydec[3]; + int pli; + int cdef_count; + int coeff_shift = AOMMAX(cm->seq_params.bit_depth - 8, 0); + uint64_t best_tot_mse = (uint64_t)1 << 63; + uint64_t tot_mse; + int sb_count; + int nvfb = (cm->mi_rows + MI_SIZE_64X64 - 1) / MI_SIZE_64X64; + int nhfb = (cm->mi_cols + MI_SIZE_64X64 - 1) / MI_SIZE_64X64; + int *sb_index = aom_malloc(nvfb * nhfb * sizeof(*sb_index)); + int *selected_strength = aom_malloc(nvfb * nhfb * sizeof(*sb_index)); + uint64_t(*mse[2])[TOTAL_STRENGTHS]; + int pri_damping = 3 + (cm->base_qindex >> 6); + int sec_damping = 3 + (cm->base_qindex >> 6); + int i; + int nb_strengths; + int nb_strength_bits; + int quantizer; + double lambda; + const int num_planes = av1_num_planes(cm); + const int total_strengths = fast ? REDUCED_TOTAL_STRENGTHS : TOTAL_STRENGTHS; + DECLARE_ALIGNED(32, uint16_t, inbuf[CDEF_INBUF_SIZE]); + uint16_t *in; + DECLARE_ALIGNED(32, uint16_t, tmp_dst[1 << (MAX_SB_SIZE_LOG2 * 2)]); + quantizer = av1_ac_quant_Q3(cm->base_qindex, 0, cm->seq_params.bit_depth) >> + (cm->seq_params.bit_depth - 8); + lambda = .12 * quantizer * quantizer / 256.; + + av1_setup_dst_planes(xd->plane, cm->seq_params.sb_size, frame, 0, 0, 0, + num_planes); + mse[0] = aom_malloc(sizeof(**mse) * nvfb * nhfb); + mse[1] = aom_malloc(sizeof(**mse) * nvfb * nhfb); + for (pli = 0; pli < num_planes; pli++) { + uint8_t *ref_buffer; + int ref_stride; + switch (pli) { + case 0: + ref_buffer = ref->y_buffer; + ref_stride = ref->y_stride; + break; + case 1: + ref_buffer = ref->u_buffer; + ref_stride = ref->uv_stride; + break; + case 2: + ref_buffer = ref->v_buffer; + ref_stride = ref->uv_stride; + break; + } + src[pli] = aom_memalign( + 32, sizeof(*src) * cm->mi_rows * cm->mi_cols * MI_SIZE * MI_SIZE); + ref_coeff[pli] = aom_memalign( + 32, sizeof(*ref_coeff) * cm->mi_rows * cm->mi_cols * MI_SIZE * MI_SIZE); + xdec[pli] = xd->plane[pli].subsampling_x; + ydec[pli] = xd->plane[pli].subsampling_y; + bsize[pli] = ydec[pli] ? (xdec[pli] ? BLOCK_4X4 : BLOCK_8X4) + : (xdec[pli] ? BLOCK_4X8 : BLOCK_8X8); + stride[pli] = cm->mi_cols << MI_SIZE_LOG2; + mi_wide_l2[pli] = MI_SIZE_LOG2 - xd->plane[pli].subsampling_x; + mi_high_l2[pli] = MI_SIZE_LOG2 - xd->plane[pli].subsampling_y; + + const int frame_height = + (cm->mi_rows * MI_SIZE) >> xd->plane[pli].subsampling_y; + const int frame_width = + (cm->mi_cols * MI_SIZE) >> xd->plane[pli].subsampling_x; + + for (r = 0; r < frame_height; ++r) { + for (c = 0; c < frame_width; ++c) { + if (cm->seq_params.use_highbitdepth) { + src[pli][r * stride[pli] + c] = CONVERT_TO_SHORTPTR( + xd->plane[pli].dst.buf)[r * xd->plane[pli].dst.stride + c]; + ref_coeff[pli][r * stride[pli] + c] = + CONVERT_TO_SHORTPTR(ref_buffer)[r * ref_stride + c]; + } else { + src[pli][r * stride[pli] + c] = + xd->plane[pli].dst.buf[r * xd->plane[pli].dst.stride + c]; + ref_coeff[pli][r * stride[pli] + c] = ref_buffer[r * ref_stride + c]; + } + } + } + } + in = inbuf + CDEF_VBORDER * CDEF_BSTRIDE + CDEF_HBORDER; + sb_count = 0; + for (fbr = 0; fbr < nvfb; ++fbr) { + for (fbc = 0; fbc < nhfb; ++fbc) { + int nvb, nhb; + int gi; + int dirinit = 0; + nhb = AOMMIN(MI_SIZE_64X64, cm->mi_cols - MI_SIZE_64X64 * fbc); + nvb = AOMMIN(MI_SIZE_64X64, cm->mi_rows - MI_SIZE_64X64 * fbr); + int hb_step = 1; + int vb_step = 1; + BLOCK_SIZE bs = BLOCK_64X64; + MB_MODE_INFO *const mbmi = + cm->mi_grid_visible[MI_SIZE_64X64 * fbr * cm->mi_stride + + MI_SIZE_64X64 * fbc]; + if (((fbc & 1) && + (mbmi->sb_type == BLOCK_128X128 || mbmi->sb_type == BLOCK_128X64)) || + ((fbr & 1) && + (mbmi->sb_type == BLOCK_128X128 || mbmi->sb_type == BLOCK_64X128))) + continue; + if (mbmi->sb_type == BLOCK_128X128 || mbmi->sb_type == BLOCK_128X64 || + mbmi->sb_type == BLOCK_64X128) + bs = mbmi->sb_type; + if (bs == BLOCK_128X128 || bs == BLOCK_128X64) { + nhb = AOMMIN(MI_SIZE_128X128, cm->mi_cols - MI_SIZE_64X64 * fbc); + hb_step = 2; + } + if (bs == BLOCK_128X128 || bs == BLOCK_64X128) { + nvb = AOMMIN(MI_SIZE_128X128, cm->mi_rows - MI_SIZE_64X64 * fbr); + vb_step = 2; + } + // No filtering if the entire filter block is skipped + if (sb_all_skip(cm, fbr * MI_SIZE_64X64, fbc * MI_SIZE_64X64)) continue; + cdef_count = sb_compute_cdef_list(cm, fbr * MI_SIZE_64X64, + fbc * MI_SIZE_64X64, dlist, bs); + for (pli = 0; pli < num_planes; pli++) { + for (i = 0; i < CDEF_INBUF_SIZE; i++) inbuf[i] = CDEF_VERY_LARGE; + for (gi = 0; gi < total_strengths; gi++) { + int threshold; + uint64_t curr_mse; + int sec_strength; + threshold = gi / CDEF_SEC_STRENGTHS; + if (fast) threshold = priconv[threshold]; + /* We avoid filtering the pixels for which some of the pixels to + average + are outside the frame. We could change the filter instead, but it + would add special cases for any future vectorization. */ + int yoff = CDEF_VBORDER * (fbr != 0); + int xoff = CDEF_HBORDER * (fbc != 0); + int ysize = (nvb << mi_high_l2[pli]) + + CDEF_VBORDER * (fbr + vb_step < nvfb) + yoff; + int xsize = (nhb << mi_wide_l2[pli]) + + CDEF_HBORDER * (fbc + hb_step < nhfb) + xoff; + sec_strength = gi % CDEF_SEC_STRENGTHS; + copy_sb16_16(&in[(-yoff * CDEF_BSTRIDE - xoff)], CDEF_BSTRIDE, + src[pli], + (fbr * MI_SIZE_64X64 << mi_high_l2[pli]) - yoff, + (fbc * MI_SIZE_64X64 << mi_wide_l2[pli]) - xoff, + stride[pli], ysize, xsize); + cdef_filter_fb(NULL, tmp_dst, CDEF_BSTRIDE, in, xdec[pli], ydec[pli], + dir, &dirinit, var, pli, dlist, cdef_count, threshold, + sec_strength + (sec_strength == 3), pri_damping, + sec_damping, coeff_shift); + curr_mse = compute_cdef_dist( + ref_coeff[pli] + + (fbr * MI_SIZE_64X64 << mi_high_l2[pli]) * stride[pli] + + (fbc * MI_SIZE_64X64 << mi_wide_l2[pli]), + stride[pli], tmp_dst, dlist, cdef_count, bsize[pli], coeff_shift, + pli); + if (pli < 2) + mse[pli][sb_count][gi] = curr_mse; + else + mse[1][sb_count][gi] += curr_mse; + sb_index[sb_count] = + MI_SIZE_64X64 * fbr * cm->mi_stride + MI_SIZE_64X64 * fbc; + } + } + sb_count++; + } + } + nb_strength_bits = 0; + /* Search for different number of signalling bits. */ + for (i = 0; i <= 3; i++) { + int j; + int best_lev0[CDEF_MAX_STRENGTHS]; + int best_lev1[CDEF_MAX_STRENGTHS] = { 0 }; + nb_strengths = 1 << i; + if (num_planes >= 3) + tot_mse = joint_strength_search_dual(best_lev0, best_lev1, nb_strengths, + mse, sb_count, fast); + else + tot_mse = joint_strength_search(best_lev0, nb_strengths, mse[0], sb_count, + fast); + /* Count superblock signalling cost. */ + tot_mse += (uint64_t)(sb_count * lambda * i); + /* Count header signalling cost. */ + tot_mse += (uint64_t)(nb_strengths * lambda * CDEF_STRENGTH_BITS); + if (tot_mse < best_tot_mse) { + best_tot_mse = tot_mse; + nb_strength_bits = i; + for (j = 0; j < 1 << nb_strength_bits; j++) { + cm->cdef_strengths[j] = best_lev0[j]; + cm->cdef_uv_strengths[j] = best_lev1[j]; + } + } + } + nb_strengths = 1 << nb_strength_bits; + + cm->cdef_bits = nb_strength_bits; + cm->nb_cdef_strengths = nb_strengths; + for (i = 0; i < sb_count; i++) { + int gi; + int best_gi; + uint64_t best_mse = (uint64_t)1 << 63; + best_gi = 0; + for (gi = 0; gi < cm->nb_cdef_strengths; gi++) { + uint64_t curr = mse[0][i][cm->cdef_strengths[gi]]; + if (num_planes >= 3) curr += mse[1][i][cm->cdef_uv_strengths[gi]]; + if (curr < best_mse) { + best_gi = gi; + best_mse = curr; + } + } + selected_strength[i] = best_gi; + cm->mi_grid_visible[sb_index[i]]->cdef_strength = best_gi; + } + + if (fast) { + for (int j = 0; j < nb_strengths; j++) { + cm->cdef_strengths[j] = + priconv[cm->cdef_strengths[j] / CDEF_SEC_STRENGTHS] * + CDEF_SEC_STRENGTHS + + (cm->cdef_strengths[j] % CDEF_SEC_STRENGTHS); + cm->cdef_uv_strengths[j] = + priconv[cm->cdef_uv_strengths[j] / CDEF_SEC_STRENGTHS] * + CDEF_SEC_STRENGTHS + + (cm->cdef_uv_strengths[j] % CDEF_SEC_STRENGTHS); + } + } + cm->cdef_pri_damping = pri_damping; + cm->cdef_sec_damping = sec_damping; + aom_free(mse[0]); + aom_free(mse[1]); + for (pli = 0; pli < num_planes; pli++) { + aom_free(src[pli]); + aom_free(ref_coeff[pli]); + } + aom_free(sb_index); + aom_free(selected_strength); +} |