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