| /* |
| * Copyright (c) 2010 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 "onyxc_int.h" |
| #include "entropymv.h" |
| |
| //#define MV_COUNT_TESTING |
| |
| #define MV_COUNT_SAT 16 |
| #define MV_MAX_UPDATE_FACTOR 160 |
| |
| #if CONFIG_NEW_MVREF |
| /* Integer pel reference mv threshold for use of high-precision 1/8 mv */ |
| #define COMPANDED_MVREF_THRESH 1000000 |
| #else |
| /* Integer pel reference mv threshold for use of high-precision 1/8 mv */ |
| #define COMPANDED_MVREF_THRESH 8 |
| #endif |
| |
| /* Smooth or bias the mv-counts before prob computation */ |
| /* #define SMOOTH_MV_COUNTS */ |
| |
| const vp9_tree_index vp9_mv_joint_tree[2 * MV_JOINTS - 2] = { |
| -MV_JOINT_ZERO, 2, |
| -MV_JOINT_HNZVZ, 4, |
| -MV_JOINT_HZVNZ, -MV_JOINT_HNZVNZ |
| }; |
| struct vp9_token_struct vp9_mv_joint_encodings[MV_JOINTS]; |
| |
| const vp9_tree_index vp9_mv_class_tree[2 * MV_CLASSES - 2] = { |
| -MV_CLASS_0, 2, |
| -MV_CLASS_1, 4, |
| 6, 8, |
| -MV_CLASS_2, -MV_CLASS_3, |
| 10, 12, |
| -MV_CLASS_4, -MV_CLASS_5, |
| -MV_CLASS_6, -MV_CLASS_7, |
| }; |
| struct vp9_token_struct vp9_mv_class_encodings[MV_CLASSES]; |
| |
| const vp9_tree_index vp9_mv_class0_tree [2 * CLASS0_SIZE - 2] = { |
| -0, -1, |
| }; |
| struct vp9_token_struct vp9_mv_class0_encodings[CLASS0_SIZE]; |
| |
| const vp9_tree_index vp9_mv_fp_tree [2 * 4 - 2] = { |
| -0, 2, |
| -1, 4, |
| -2, -3 |
| }; |
| struct vp9_token_struct vp9_mv_fp_encodings[4]; |
| |
| const nmv_context vp9_default_nmv_context = { |
| {32, 64, 96}, |
| { |
| { /* vert component */ |
| 128, /* sign */ |
| {224, 144, 192, 168, 192, 176, 192}, /* class */ |
| {216}, /* class0 */ |
| {136, 140, 148, 160, 176, 192, 224}, /* bits */ |
| {{128, 128, 64}, {96, 112, 64}}, /* class0_fp */ |
| {64, 96, 64}, /* fp */ |
| 160, /* class0_hp bit */ |
| 128, /* hp */ |
| }, |
| { /* hor component */ |
| 128, /* sign */ |
| {216, 128, 176, 160, 176, 176, 192}, /* class */ |
| {208}, /* class0 */ |
| {136, 140, 148, 160, 176, 192, 224}, /* bits */ |
| {{128, 128, 64}, {96, 112, 64}}, /* class0_fp */ |
| {64, 96, 64}, /* fp */ |
| 160, /* class0_hp bit */ |
| 128, /* hp */ |
| } |
| }, |
| }; |
| |
| MV_JOINT_TYPE vp9_get_mv_joint(MV mv) { |
| if (mv.row == 0 && mv.col == 0) return MV_JOINT_ZERO; |
| else if (mv.row == 0 && mv.col != 0) return MV_JOINT_HNZVZ; |
| else if (mv.row != 0 && mv.col == 0) return MV_JOINT_HZVNZ; |
| else return MV_JOINT_HNZVNZ; |
| } |
| |
| #define mv_class_base(c) ((c) ? (CLASS0_SIZE << (c + 2)) : 0) |
| |
| MV_CLASS_TYPE vp9_get_mv_class(int z, int *offset) { |
| MV_CLASS_TYPE c; |
| if (z < CLASS0_SIZE * 8) c = MV_CLASS_0; |
| else if (z < CLASS0_SIZE * 16) c = MV_CLASS_1; |
| else if (z < CLASS0_SIZE * 32) c = MV_CLASS_2; |
| else if (z < CLASS0_SIZE * 64) c = MV_CLASS_3; |
| else if (z < CLASS0_SIZE * 128) c = MV_CLASS_4; |
| else if (z < CLASS0_SIZE * 256) c = MV_CLASS_5; |
| else if (z < CLASS0_SIZE * 512) c = MV_CLASS_6; |
| else if (z < CLASS0_SIZE * 1024) c = MV_CLASS_7; |
| else assert(0); |
| if (offset) |
| *offset = z - mv_class_base(c); |
| return c; |
| } |
| |
| int vp9_use_nmv_hp(const MV *ref) { |
| if ((abs(ref->row) >> 3) < COMPANDED_MVREF_THRESH && |
| (abs(ref->col) >> 3) < COMPANDED_MVREF_THRESH) |
| return 1; |
| else |
| return 0; |
| } |
| |
| int vp9_get_mv_mag(MV_CLASS_TYPE c, int offset) { |
| return mv_class_base(c) + offset; |
| } |
| |
| static void increment_nmv_component_count(int v, |
| nmv_component_counts *mvcomp, |
| int incr, |
| int usehp) { |
| assert (v != 0); /* should not be zero */ |
| mvcomp->mvcount[MV_MAX + v] += incr; |
| } |
| |
| static void increment_nmv_component(int v, |
| nmv_component_counts *mvcomp, |
| int incr, |
| int usehp) { |
| int s, z, c, o, d, e, f; |
| assert (v != 0); /* should not be zero */ |
| s = v < 0; |
| mvcomp->sign[s] += incr; |
| z = (s ? -v : v) - 1; /* magnitude - 1 */ |
| |
| c = vp9_get_mv_class(z, &o); |
| mvcomp->classes[c] += incr; |
| |
| d = (o >> 3); /* int mv data */ |
| f = (o >> 1) & 3; /* fractional pel mv data */ |
| e = (o & 1); /* high precision mv data */ |
| if (c == MV_CLASS_0) { |
| mvcomp->class0[d] += incr; |
| } else { |
| int i, b; |
| b = c + CLASS0_BITS - 1; /* number of bits */ |
| for (i = 0; i < b; ++i) |
| mvcomp->bits[i][((d >> i) & 1)] += incr; |
| } |
| |
| /* Code the fractional pel bits */ |
| if (c == MV_CLASS_0) { |
| mvcomp->class0_fp[d][f] += incr; |
| } else { |
| mvcomp->fp[f] += incr; |
| } |
| |
| /* Code the high precision bit */ |
| if (usehp) { |
| if (c == MV_CLASS_0) { |
| mvcomp->class0_hp[e] += incr; |
| } else { |
| mvcomp->hp[e] += incr; |
| } |
| } |
| } |
| |
| #ifdef SMOOTH_MV_COUNTS |
| static void smooth_counts(nmv_component_counts *mvcomp) { |
| static const int flen = 3; // (filter_length + 1) / 2 |
| static const int fval[] = {8, 3, 1}; |
| static const int fvalbits = 4; |
| int i; |
| unsigned int smvcount[MV_VALS]; |
| vpx_memcpy(smvcount, mvcomp->mvcount, sizeof(smvcount)); |
| smvcount[MV_MAX] = (smvcount[MV_MAX - 1] + smvcount[MV_MAX + 1]) >> 1; |
| for (i = flen - 1; i <= MV_VALS - flen; ++i) { |
| int j, s = smvcount[i] * fval[0]; |
| for (j = 1; j < flen; ++j) |
| s += (smvcount[i - j] + smvcount[i + j]) * fval[j]; |
| mvcomp->mvcount[i] = (s + (1 << (fvalbits - 1))) >> fvalbits; |
| } |
| } |
| #endif |
| |
| static void counts_to_context(nmv_component_counts *mvcomp, int usehp) { |
| int v; |
| vpx_memset(mvcomp->sign, 0, sizeof(nmv_component_counts) - sizeof(mvcomp->mvcount)); |
| for (v = 1; v <= MV_MAX; v++) { |
| increment_nmv_component(-v, mvcomp, mvcomp->mvcount[MV_MAX - v], usehp); |
| increment_nmv_component( v, mvcomp, mvcomp->mvcount[MV_MAX + v], usehp); |
| } |
| } |
| |
| void vp9_increment_nmv(const MV *mv, const MV *ref, nmv_context_counts *mvctx, |
| int usehp) { |
| MV_JOINT_TYPE j = vp9_get_mv_joint(*mv); |
| mvctx->joints[j]++; |
| usehp = usehp && vp9_use_nmv_hp(ref); |
| if (j == MV_JOINT_HZVNZ || j == MV_JOINT_HNZVNZ) { |
| increment_nmv_component_count(mv->row, &mvctx->comps[0], 1, usehp); |
| } |
| if (j == MV_JOINT_HNZVZ || j == MV_JOINT_HNZVNZ) { |
| increment_nmv_component_count(mv->col, &mvctx->comps[1], 1, usehp); |
| } |
| } |
| |
| static void adapt_prob(vp9_prob *dest, vp9_prob prep, vp9_prob newp, |
| unsigned int ct[2]) { |
| int factor; |
| int prob; |
| int count = ct[0] + ct[1]; |
| if (count) { |
| count = count > MV_COUNT_SAT ? MV_COUNT_SAT : count; |
| factor = (MV_MAX_UPDATE_FACTOR * count / MV_COUNT_SAT); |
| prob = ((int)prep * (256 - factor) + (int)(newp) * factor + 128) >> 8; |
| prob += !prob; |
| prob = (prob > 255 ? 255 : prob); |
| *dest = prob; |
| } |
| } |
| |
| void vp9_counts_to_nmv_context( |
| nmv_context_counts *NMVcount, |
| nmv_context *prob, |
| int usehp, |
| unsigned int (*branch_ct_joint)[2], |
| unsigned int (*branch_ct_sign)[2], |
| unsigned int (*branch_ct_classes)[MV_CLASSES - 1][2], |
| unsigned int (*branch_ct_class0)[CLASS0_SIZE - 1][2], |
| unsigned int (*branch_ct_bits)[MV_OFFSET_BITS][2], |
| unsigned int (*branch_ct_class0_fp)[CLASS0_SIZE][4 - 1][2], |
| unsigned int (*branch_ct_fp)[4 - 1][2], |
| unsigned int (*branch_ct_class0_hp)[2], |
| unsigned int (*branch_ct_hp)[2]) { |
| int i, j, k; |
| counts_to_context(&NMVcount->comps[0], usehp); |
| counts_to_context(&NMVcount->comps[1], usehp); |
| vp9_tree_probs_from_distribution(MV_JOINTS, |
| vp9_mv_joint_encodings, |
| vp9_mv_joint_tree, |
| prob->joints, |
| branch_ct_joint, |
| NMVcount->joints, |
| 256, 1); |
| for (i = 0; i < 2; ++i) { |
| prob->comps[i].sign = |
| vp9_bin_prob_from_distribution(NMVcount->comps[i].sign); |
| branch_ct_sign[i][0] = NMVcount->comps[i].sign[0]; |
| branch_ct_sign[i][1] = NMVcount->comps[i].sign[1]; |
| vp9_tree_probs_from_distribution(MV_CLASSES, |
| vp9_mv_class_encodings, |
| vp9_mv_class_tree, |
| prob->comps[i].classes, |
| branch_ct_classes[i], |
| NMVcount->comps[i].classes, |
| 256, 1); |
| vp9_tree_probs_from_distribution(CLASS0_SIZE, |
| vp9_mv_class0_encodings, |
| vp9_mv_class0_tree, |
| prob->comps[i].class0, |
| branch_ct_class0[i], |
| NMVcount->comps[i].class0, |
| 256, 1); |
| for (j = 0; j < MV_OFFSET_BITS; ++j) { |
| prob->comps[i].bits[j] = vp9_bin_prob_from_distribution( |
| NMVcount->comps[i].bits[j]); |
| branch_ct_bits[i][j][0] = NMVcount->comps[i].bits[j][0]; |
| branch_ct_bits[i][j][1] = NMVcount->comps[i].bits[j][1]; |
| } |
| } |
| for (i = 0; i < 2; ++i) { |
| for (k = 0; k < CLASS0_SIZE; ++k) { |
| vp9_tree_probs_from_distribution(4, |
| vp9_mv_fp_encodings, |
| vp9_mv_fp_tree, |
| prob->comps[i].class0_fp[k], |
| branch_ct_class0_fp[i][k], |
| NMVcount->comps[i].class0_fp[k], |
| 256, 1); |
| } |
| vp9_tree_probs_from_distribution(4, |
| vp9_mv_fp_encodings, |
| vp9_mv_fp_tree, |
| prob->comps[i].fp, |
| branch_ct_fp[i], |
| NMVcount->comps[i].fp, |
| 256, 1); |
| } |
| if (usehp) { |
| for (i = 0; i < 2; ++i) { |
| prob->comps[i].class0_hp = vp9_bin_prob_from_distribution( |
| NMVcount->comps[i].class0_hp); |
| branch_ct_class0_hp[i][0] = NMVcount->comps[i].class0_hp[0]; |
| branch_ct_class0_hp[i][1] = NMVcount->comps[i].class0_hp[1]; |
| |
| prob->comps[i].hp = |
| vp9_bin_prob_from_distribution(NMVcount->comps[i].hp); |
| branch_ct_hp[i][0] = NMVcount->comps[i].hp[0]; |
| branch_ct_hp[i][1] = NMVcount->comps[i].hp[1]; |
| } |
| } |
| } |
| |
| void vp9_adapt_nmv_probs(VP9_COMMON *cm, int usehp) { |
| int i, j, k; |
| nmv_context prob; |
| unsigned int branch_ct_joint[MV_JOINTS - 1][2]; |
| unsigned int branch_ct_sign[2][2]; |
| unsigned int branch_ct_classes[2][MV_CLASSES - 1][2]; |
| unsigned int branch_ct_class0[2][CLASS0_SIZE - 1][2]; |
| unsigned int branch_ct_bits[2][MV_OFFSET_BITS][2]; |
| unsigned int branch_ct_class0_fp[2][CLASS0_SIZE][4 - 1][2]; |
| unsigned int branch_ct_fp[2][4 - 1][2]; |
| unsigned int branch_ct_class0_hp[2][2]; |
| unsigned int branch_ct_hp[2][2]; |
| #ifdef MV_COUNT_TESTING |
| printf("joints count: "); |
| for (j = 0; j < MV_JOINTS; ++j) printf("%d ", cm->fc.NMVcount.joints[j]); |
| printf("\n"); fflush(stdout); |
| printf("signs count:\n"); |
| for (i = 0; i < 2; ++i) |
| printf("%d/%d ", cm->fc.NMVcount.comps[i].sign[0], cm->fc.NMVcount.comps[i].sign[1]); |
| printf("\n"); fflush(stdout); |
| printf("classes count:\n"); |
| for (i = 0; i < 2; ++i) { |
| for (j = 0; j < MV_CLASSES; ++j) |
| printf("%d ", cm->fc.NMVcount.comps[i].classes[j]); |
| printf("\n"); fflush(stdout); |
| } |
| printf("class0 count:\n"); |
| for (i = 0; i < 2; ++i) { |
| for (j = 0; j < CLASS0_SIZE; ++j) |
| printf("%d ", cm->fc.NMVcount.comps[i].class0[j]); |
| printf("\n"); fflush(stdout); |
| } |
| printf("bits count:\n"); |
| for (i = 0; i < 2; ++i) { |
| for (j = 0; j < MV_OFFSET_BITS; ++j) |
| printf("%d/%d ", cm->fc.NMVcount.comps[i].bits[j][0], |
| cm->fc.NMVcount.comps[i].bits[j][1]); |
| printf("\n"); fflush(stdout); |
| } |
| printf("class0_fp count:\n"); |
| for (i = 0; i < 2; ++i) { |
| for (j = 0; j < CLASS0_SIZE; ++j) { |
| printf("{"); |
| for (k = 0; k < 4; ++k) |
| printf("%d ", cm->fc.NMVcount.comps[i].class0_fp[j][k]); |
| printf("}, "); |
| } |
| printf("\n"); fflush(stdout); |
| } |
| printf("fp count:\n"); |
| for (i = 0; i < 2; ++i) { |
| for (j = 0; j < 4; ++j) |
| printf("%d ", cm->fc.NMVcount.comps[i].fp[j]); |
| printf("\n"); fflush(stdout); |
| } |
| if (usehp) { |
| printf("class0_hp count:\n"); |
| for (i = 0; i < 2; ++i) |
| printf("%d/%d ", cm->fc.NMVcount.comps[i].class0_hp[0], |
| cm->fc.NMVcount.comps[i].class0_hp[1]); |
| printf("\n"); fflush(stdout); |
| printf("hp count:\n"); |
| for (i = 0; i < 2; ++i) |
| printf("%d/%d ", cm->fc.NMVcount.comps[i].hp[0], |
| cm->fc.NMVcount.comps[i].hp[1]); |
| printf("\n"); fflush(stdout); |
| } |
| #endif |
| #ifdef SMOOTH_MV_COUNTS |
| smooth_counts(&cm->fc.NMVcount.comps[0]); |
| smooth_counts(&cm->fc.NMVcount.comps[1]); |
| #endif |
| vp9_counts_to_nmv_context(&cm->fc.NMVcount, |
| &prob, |
| usehp, |
| branch_ct_joint, |
| branch_ct_sign, |
| branch_ct_classes, |
| branch_ct_class0, |
| branch_ct_bits, |
| branch_ct_class0_fp, |
| branch_ct_fp, |
| branch_ct_class0_hp, |
| branch_ct_hp); |
| |
| for (j = 0; j < MV_JOINTS - 1; ++j) { |
| adapt_prob(&cm->fc.nmvc.joints[j], |
| cm->fc.pre_nmvc.joints[j], |
| prob.joints[j], |
| branch_ct_joint[j]); |
| } |
| for (i = 0; i < 2; ++i) { |
| adapt_prob(&cm->fc.nmvc.comps[i].sign, |
| cm->fc.pre_nmvc.comps[i].sign, |
| prob.comps[i].sign, |
| branch_ct_sign[i]); |
| for (j = 0; j < MV_CLASSES - 1; ++j) { |
| adapt_prob(&cm->fc.nmvc.comps[i].classes[j], |
| cm->fc.pre_nmvc.comps[i].classes[j], |
| prob.comps[i].classes[j], |
| branch_ct_classes[i][j]); |
| } |
| for (j = 0; j < CLASS0_SIZE - 1; ++j) { |
| adapt_prob(&cm->fc.nmvc.comps[i].class0[j], |
| cm->fc.pre_nmvc.comps[i].class0[j], |
| prob.comps[i].class0[j], |
| branch_ct_class0[i][j]); |
| } |
| for (j = 0; j < MV_OFFSET_BITS; ++j) { |
| adapt_prob(&cm->fc.nmvc.comps[i].bits[j], |
| cm->fc.pre_nmvc.comps[i].bits[j], |
| prob.comps[i].bits[j], |
| branch_ct_bits[i][j]); |
| } |
| } |
| for (i = 0; i < 2; ++i) { |
| for (j = 0; j < CLASS0_SIZE; ++j) { |
| for (k = 0; k < 3; ++k) { |
| adapt_prob(&cm->fc.nmvc.comps[i].class0_fp[j][k], |
| cm->fc.pre_nmvc.comps[i].class0_fp[j][k], |
| prob.comps[i].class0_fp[j][k], |
| branch_ct_class0_fp[i][j][k]); |
| } |
| } |
| for (j = 0; j < 3; ++j) { |
| adapt_prob(&cm->fc.nmvc.comps[i].fp[j], |
| cm->fc.pre_nmvc.comps[i].fp[j], |
| prob.comps[i].fp[j], |
| branch_ct_fp[i][j]); |
| } |
| } |
| if (usehp) { |
| for (i = 0; i < 2; ++i) { |
| adapt_prob(&cm->fc.nmvc.comps[i].class0_hp, |
| cm->fc.pre_nmvc.comps[i].class0_hp, |
| prob.comps[i].class0_hp, |
| branch_ct_class0_hp[i]); |
| adapt_prob(&cm->fc.nmvc.comps[i].hp, |
| cm->fc.pre_nmvc.comps[i].hp, |
| prob.comps[i].hp, |
| branch_ct_hp[i]); |
| } |
| } |
| } |
| |
| void vp9_entropy_mv_init() { |
| vp9_tokens_from_tree(vp9_mv_joint_encodings, vp9_mv_joint_tree); |
| vp9_tokens_from_tree(vp9_mv_class_encodings, vp9_mv_class_tree); |
| vp9_tokens_from_tree(vp9_mv_class0_encodings, vp9_mv_class0_tree); |
| vp9_tokens_from_tree(vp9_mv_fp_encodings, vp9_mv_fp_tree); |
| } |
| |
| void vp9_init_mv_probs(VP9_COMMON *cm) { |
| vpx_memcpy(&cm->fc.nmvc, &vp9_default_nmv_context, sizeof(nmv_context)); |
| } |
