775 lines
19 KiB
C
775 lines
19 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 "vp8/common/common.h"
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#include "encodemv.h"
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#include "vp8/common/entropymode.h"
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#include "vp8/common/systemdependent.h"
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#include <math.h>
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#ifdef ENTROPY_STATS
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extern unsigned int active_section;
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#endif
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//#define DEBUG_ENC_MV
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#ifdef DEBUG_ENC_MV
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int enc_mvcount = 0;
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#endif
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static void encode_mvcomponent(
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vp8_writer *const w,
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const int v,
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const struct mv_context *mvc
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)
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{
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const vp8_prob *p = mvc->prob;
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const int x = v < 0 ? -v : v;
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if (x < mvnum_short) // Small
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{
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vp8_write(w, 0, p [mvpis_short]);
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vp8_treed_write(w, vp8_small_mvtree, p + MVPshort, x, mvnum_short_bits);
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if (!x)
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return; // no sign bit
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}
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else // Large
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{
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int i = 0;
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vp8_write(w, 1, p [mvpis_short]);
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do
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vp8_write(w, (x >> i) & 1, p [MVPbits + i]);
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while (++i < mvnum_short_bits);
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i = mvlong_width - 1; /* Skip bit 3, which is sometimes implicit */
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do
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vp8_write(w, (x >> i) & 1, p [MVPbits + i]);
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while (--i > mvnum_short_bits);
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if (x & ~((2<<mvnum_short_bits)-1))
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vp8_write(w, (x >> mvnum_short_bits) & 1, p [MVPbits + mvnum_short_bits]);
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}
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vp8_write(w, v < 0, p [MVPsign]);
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}
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#if 0
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static int max_mv_r = 0;
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static int max_mv_c = 0;
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#endif
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void vp8_encode_motion_vector(vp8_writer *w, const MV *mv, const MV_CONTEXT *mvc)
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{
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#if 0
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{
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if (abs(mv->row >> 1) > max_mv_r)
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{
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FILE *f = fopen("maxmv.stt", "a");
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max_mv_r = abs(mv->row >> 1);
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fprintf(f, "New Mv Row Max %6d\n", (mv->row >> 1));
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if ((abs(mv->row) / 2) != max_mv_r)
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fprintf(f, "MV Row conversion error %6d\n", abs(mv->row) / 2);
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fclose(f);
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}
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if (abs(mv->col >> 1) > max_mv_c)
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{
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FILE *f = fopen("maxmv.stt", "a");
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fprintf(f, "New Mv Col Max %6d\n", (mv->col >> 1));
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max_mv_c = abs(mv->col >> 1);
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fclose(f);
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}
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}
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#endif
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encode_mvcomponent(w, mv->row >> 1, &mvc[0]);
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encode_mvcomponent(w, mv->col >> 1, &mvc[1]);
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#ifdef DEBUG_ENC_MV
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{
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int i;
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printf("%d (np): %d %d\n", enc_mvcount++,
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(mv->row >> 1)<<1, (mv->col >> 1)<<1);
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//for (i=0; i<MVPcount;++i) printf(" %d", (&mvc[0])->prob[i]);
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//printf("\n");
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//for (i=0; i<MVPcount;++i) printf(" %d", (&mvc[1])->prob[i]);
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//printf("\n");
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fflush(stdout);
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}
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#endif
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}
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static unsigned int cost_mvcomponent(const int v, const struct mv_context *mvc)
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{
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const vp8_prob *p = mvc->prob;
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const int x = v; //v<0? -v:v;
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unsigned int cost;
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if (x < mvnum_short)
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{
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cost = vp8_cost_zero(p [mvpis_short])
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+ vp8_treed_cost(vp8_small_mvtree, p + MVPshort, x, mvnum_short_bits);
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if (!x)
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return cost;
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}
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else
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{
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int i = 0;
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cost = vp8_cost_one(p [mvpis_short]);
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do
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cost += vp8_cost_bit(p [MVPbits + i], (x >> i) & 1);
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while (++i < mvnum_short_bits);
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i = mvlong_width - 1; /* Skip bit 3, which is sometimes implicit */
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do
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cost += vp8_cost_bit(p [MVPbits + i], (x >> i) & 1);
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while (--i > mvnum_short_bits);
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if (x & ~((2<<mvnum_short_bits)-1))
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cost += vp8_cost_bit(p [MVPbits + mvnum_short_bits], (x >> mvnum_short_bits) & 1);
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}
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return cost; // + vp8_cost_bit( p [MVPsign], v < 0);
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}
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void vp8_build_component_cost_table(int *mvcost[2], const MV_CONTEXT *mvc, int mvc_flag[2])
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{
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int i = 1; //-mv_max;
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unsigned int cost0 = 0;
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unsigned int cost1 = 0;
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vp8_clear_system_state();
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i = 1;
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if (mvc_flag[0])
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{
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mvcost [0] [0] = cost_mvcomponent(0, &mvc[0]);
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do
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{
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//mvcost [0] [i] = cost_mvcomponent( i, &mvc[0]);
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cost0 = cost_mvcomponent(i, &mvc[0]);
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mvcost [0] [i] = cost0 + vp8_cost_zero(mvc[0].prob[MVPsign]);
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mvcost [0] [-i] = cost0 + vp8_cost_one(mvc[0].prob[MVPsign]);
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}
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while (++i <= mv_max);
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}
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i = 1;
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if (mvc_flag[1])
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{
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mvcost [1] [0] = cost_mvcomponent(0, &mvc[1]);
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do
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{
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//mvcost [1] [i] = cost_mvcomponent( i, mvc[1]);
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cost1 = cost_mvcomponent(i, &mvc[1]);
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mvcost [1] [i] = cost1 + vp8_cost_zero(mvc[1].prob[MVPsign]);
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mvcost [1] [-i] = cost1 + vp8_cost_one(mvc[1].prob[MVPsign]);
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}
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while (++i <= mv_max);
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}
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}
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// Motion vector probability table update depends on benefit.
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// Small correction allows for the fact that an update to an MV probability
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// may have benefit in subsequent frames as well as the current one.
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#define MV_PROB_UPDATE_CORRECTION -1
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__inline static void calc_prob(vp8_prob *p, const unsigned int ct[2])
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{
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const unsigned int tot = ct[0] + ct[1];
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if (tot)
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{
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const vp8_prob x = ((ct[0] * 255) / tot) & -2;
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*p = x ? x : 1;
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}
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}
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static void update(
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vp8_writer *const w,
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const unsigned int ct[2],
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vp8_prob *const cur_p,
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const vp8_prob new_p,
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const vp8_prob update_p,
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int *updated
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)
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{
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const int cur_b = vp8_cost_branch(ct, *cur_p);
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const int new_b = vp8_cost_branch(ct, new_p);
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const int cost = 7 + MV_PROB_UPDATE_CORRECTION + ((vp8_cost_one(update_p) - vp8_cost_zero(update_p) + 128) >> 8);
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if (cur_b - new_b > cost)
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{
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*cur_p = new_p;
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vp8_write(w, 1, update_p);
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vp8_write_literal(w, new_p >> 1, 7);
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*updated = 1;
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}
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else
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vp8_write(w, 0, update_p);
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}
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static void write_component_probs(
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vp8_writer *const w,
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struct mv_context *cur_mvc,
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const struct mv_context *default_mvc_,
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const struct mv_context *update_mvc,
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const unsigned int events [MVvals],
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unsigned int rc,
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int *updated
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)
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{
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vp8_prob *Pcur = cur_mvc->prob;
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const vp8_prob *default_mvc = default_mvc_->prob;
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const vp8_prob *Pupdate = update_mvc->prob;
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unsigned int is_short_ct[2], sign_ct[2];
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unsigned int bit_ct [mvlong_width] [2];
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unsigned int short_ct [mvnum_short];
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unsigned int short_bct [mvnum_short-1] [2];
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vp8_prob Pnew [MVPcount];
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(void) rc;
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vp8_copy_array(Pnew, default_mvc, MVPcount);
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vp8_zero(is_short_ct)
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vp8_zero(sign_ct)
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vp8_zero(bit_ct)
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vp8_zero(short_ct)
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vp8_zero(short_bct)
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//j=0
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{
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const int c = events [mv_max];
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is_short_ct [0] += c; // Short vector
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short_ct [0] += c; // Magnitude distribution
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}
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//j: 1 ~ mv_max (1023)
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{
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int j = 1;
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do
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{
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const int c1 = events [mv_max + j]; //positive
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const int c2 = events [mv_max - j]; //negative
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const int c = c1 + c2;
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int a = j;
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sign_ct [0] += c1;
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sign_ct [1] += c2;
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if (a < mvnum_short)
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{
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is_short_ct [0] += c; // Short vector
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short_ct [a] += c; // Magnitude distribution
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}
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else
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{
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int k = mvlong_width - 1;
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is_short_ct [1] += c; // Long vector
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/* bit 3 not always encoded. */
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do
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bit_ct [k] [(a >> k) & 1] += c;
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while (--k >= 0);
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}
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}
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while (++j <= mv_max);
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}
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/*
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{
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int j = -mv_max;
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do
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{
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const int c = events [mv_max + j];
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int a = j;
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if( j < 0)
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{
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sign_ct [1] += c;
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a = -j;
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}
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else if( j)
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sign_ct [0] += c;
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if( a < mvnum_short)
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{
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is_short_ct [0] += c; // Short vector
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short_ct [a] += c; // Magnitude distribution
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}
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else
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{
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int k = mvlong_width - 1;
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is_short_ct [1] += c; // Long vector
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// bit 3 not always encoded.
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do
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bit_ct [k] [(a >> k) & 1] += c;
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while( --k >= 0);
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}
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} while( ++j <= mv_max);
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}
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*/
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calc_prob(Pnew + mvpis_short, is_short_ct);
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calc_prob(Pnew + MVPsign, sign_ct);
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{
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vp8_prob p [mvnum_short - 1]; /* actually only need branch ct */
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int j = 0;
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vp8_tree_probs_from_distribution(
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mvnum_short, vp8_small_mvencodings, vp8_small_mvtree,
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p, short_bct, short_ct,
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256, 1
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);
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do
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calc_prob(Pnew + MVPshort + j, short_bct[j]);
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while (++j < mvnum_short - 1);
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}
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{
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int j = 0;
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do
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calc_prob(Pnew + MVPbits + j, bit_ct[j]);
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while (++j < mvlong_width);
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}
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update(w, is_short_ct, Pcur + mvpis_short, Pnew[mvpis_short], *Pupdate++, updated);
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update(w, sign_ct, Pcur + MVPsign, Pnew[MVPsign], *Pupdate++, updated);
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{
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const vp8_prob *const new_p = Pnew + MVPshort;
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vp8_prob *const cur_p = Pcur + MVPshort;
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int j = 0;
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do
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update(w, short_bct[j], cur_p + j, new_p[j], *Pupdate++, updated);
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while (++j < mvnum_short - 1);
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}
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{
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const vp8_prob *const new_p = Pnew + MVPbits;
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vp8_prob *const cur_p = Pcur + MVPbits;
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int j = 0;
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do
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update(w, bit_ct[j], cur_p + j, new_p[j], *Pupdate++, updated);
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while (++j < mvlong_width);
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}
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}
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void vp8_write_mvprobs(VP8_COMP *cpi)
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{
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vp8_writer *const w = & cpi->bc;
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MV_CONTEXT *mvc = cpi->common.fc.mvc;
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int flags[2] = {0, 0};
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#ifdef ENTROPY_STATS
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active_section = 4;
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#endif
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write_component_probs(
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w, &mvc[0], &vp8_default_mv_context[0], &vp8_mv_update_probs[0], cpi->MVcount[0], 0, &flags[0]
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);
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write_component_probs(
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w, &mvc[1], &vp8_default_mv_context[1], &vp8_mv_update_probs[1], cpi->MVcount[1], 1, &flags[1]
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);
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if (flags[0] || flags[1])
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vp8_build_component_cost_table(cpi->mb.mvcost, (const MV_CONTEXT *) cpi->common.fc.mvc, flags);
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#ifdef ENTROPY_STATS
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active_section = 5;
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#endif
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}
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#if CONFIG_HIGH_PRECISION_MV
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static void encode_mvcomponent_hp(
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vp8_writer *const w,
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const int v,
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const struct mv_context_hp *mvc
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)
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{
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const vp8_prob *p = mvc->prob;
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const int x = v < 0 ? -v : v;
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if (x < mvnum_short_hp) // Small
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{
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vp8_write(w, 0, p [mvpis_short_hp]);
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vp8_treed_write(w, vp8_small_mvtree_hp, p + MVPshort_hp, x,
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mvnum_short_bits_hp);
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if (!x)
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return; // no sign bit
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}
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else // Large
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{
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int i = 0;
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vp8_write(w, 1, p [mvpis_short_hp]);
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do
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vp8_write(w, (x >> i) & 1, p [MVPbits_hp + i]);
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while (++i < mvnum_short_bits_hp);
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i = mvlong_width_hp - 1; /* Skip bit 3, which is sometimes implicit */
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do
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vp8_write(w, (x >> i) & 1, p [MVPbits_hp + i]);
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while (--i > mvnum_short_bits_hp);
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if (x & ~((2<<mvnum_short_bits_hp)-1))
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vp8_write(w, (x >> mvnum_short_bits_hp) & 1,
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p [MVPbits_hp + mvnum_short_bits_hp]);
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}
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vp8_write(w, v < 0, p [MVPsign_hp]);
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}
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#if 0
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static int max_mv_r = 0;
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static int max_mv_c = 0;
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#endif
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void vp8_encode_motion_vector_hp(vp8_writer *w, const MV *mv,
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const MV_CONTEXT_HP *mvc)
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{
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#if 0
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{
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if (abs(mv->row >> 1) > max_mv_r)
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{
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FILE *f = fopen("maxmv.stt", "a");
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max_mv_r = abs(mv->row >> 1);
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fprintf(f, "New Mv Row Max %6d\n", (mv->row >> 1));
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if ((abs(mv->row) / 2) != max_mv_r)
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fprintf(f, "MV Row conversion error %6d\n", abs(mv->row) / 2);
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fclose(f);
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}
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if (abs(mv->col >> 1) > max_mv_c)
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{
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FILE *f = fopen("maxmv.stt", "a");
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fprintf(f, "New Mv Col Max %6d\n", (mv->col >> 1));
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max_mv_c = abs(mv->col >> 1);
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fclose(f);
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}
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}
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#endif
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encode_mvcomponent_hp(w, mv->row, &mvc[0]);
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encode_mvcomponent_hp(w, mv->col, &mvc[1]);
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#ifdef DEBUG_ENC_MV
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{
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int i;
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printf("%d (hp): %d %d\n", enc_mvcount++, mv->row, mv->col);
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//for (i=0; i<MVPcount_hp;++i) printf(" %d", (&mvc[0])->prob[i]);
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//printf("\n");
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//for (i=0; i<MVPcount_hp;++i) printf(" %d", (&mvc[1])->prob[i]);
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//printf("\n");
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fflush(stdout);
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}
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#endif
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}
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static unsigned int cost_mvcomponent_hp(const int v,
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const struct mv_context_hp *mvc)
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{
|
|
const vp8_prob *p = mvc->prob;
|
|
const int x = v; //v<0? -v:v;
|
|
unsigned int cost;
|
|
|
|
if (x < mvnum_short_hp)
|
|
{
|
|
cost = vp8_cost_zero(p [mvpis_short_hp])
|
|
+ vp8_treed_cost(vp8_small_mvtree_hp, p + MVPshort_hp, x,
|
|
mvnum_short_bits_hp);
|
|
|
|
if (!x)
|
|
return cost;
|
|
}
|
|
else
|
|
{
|
|
int i = 0;
|
|
cost = vp8_cost_one(p [mvpis_short_hp]);
|
|
|
|
do
|
|
cost += vp8_cost_bit(p [MVPbits_hp + i], (x >> i) & 1);
|
|
|
|
while (++i < mvnum_short_bits_hp);
|
|
|
|
i = mvlong_width_hp - 1; /* Skip bit 3, which is sometimes implicit */
|
|
|
|
do
|
|
cost += vp8_cost_bit(p [MVPbits_hp + i], (x >> i) & 1);
|
|
|
|
while (--i > mvnum_short_bits_hp);
|
|
|
|
if (x & ~((2<<mvnum_short_bits_hp)-1))
|
|
cost += vp8_cost_bit(p [MVPbits_hp + mvnum_short_bits_hp],
|
|
(x >> mvnum_short_bits_hp) & 1);
|
|
}
|
|
|
|
return cost; // + vp8_cost_bit( p [MVPsign], v < 0);
|
|
}
|
|
|
|
void vp8_build_component_cost_table_hp(int *mvcost[2],
|
|
const MV_CONTEXT_HP *mvc,
|
|
int mvc_flag[2])
|
|
{
|
|
int i = 1; //-mv_max;
|
|
unsigned int cost0 = 0;
|
|
unsigned int cost1 = 0;
|
|
|
|
vp8_clear_system_state();
|
|
|
|
i = 1;
|
|
|
|
if (mvc_flag[0])
|
|
{
|
|
mvcost [0] [0] = cost_mvcomponent_hp(0, &mvc[0]);
|
|
|
|
do
|
|
{
|
|
//mvcost [0] [i] = cost_mvcomponent( i, &mvc[0]);
|
|
cost0 = cost_mvcomponent_hp(i, &mvc[0]);
|
|
|
|
mvcost [0] [i] = cost0 + vp8_cost_zero(mvc[0].prob[MVPsign_hp]);
|
|
mvcost [0] [-i] = cost0 + vp8_cost_one(mvc[0].prob[MVPsign_hp]);
|
|
}
|
|
while (++i <= mv_max_hp);
|
|
}
|
|
|
|
i = 1;
|
|
|
|
if (mvc_flag[1])
|
|
{
|
|
mvcost [1] [0] = cost_mvcomponent_hp(0, &mvc[1]);
|
|
|
|
do
|
|
{
|
|
//mvcost [1] [i] = cost_mvcomponent( i, mvc[1]);
|
|
cost1 = cost_mvcomponent_hp(i, &mvc[1]);
|
|
|
|
mvcost [1] [i] = cost1 + vp8_cost_zero(mvc[1].prob[MVPsign_hp]);
|
|
mvcost [1] [-i] = cost1 + vp8_cost_one(mvc[1].prob[MVPsign_hp]);
|
|
}
|
|
while (++i <= mv_max_hp);
|
|
}
|
|
}
|
|
|
|
|
|
static void write_component_probs_hp(
|
|
vp8_writer *const w,
|
|
struct mv_context_hp *cur_mvc,
|
|
const struct mv_context_hp *default_mvc_,
|
|
const struct mv_context_hp *update_mvc,
|
|
const unsigned int events [MVvals_hp],
|
|
unsigned int rc,
|
|
int *updated
|
|
)
|
|
{
|
|
vp8_prob *Pcur = cur_mvc->prob;
|
|
const vp8_prob *default_mvc = default_mvc_->prob;
|
|
const vp8_prob *Pupdate = update_mvc->prob;
|
|
unsigned int is_short_ct[2], sign_ct[2];
|
|
|
|
unsigned int bit_ct [mvlong_width_hp] [2];
|
|
|
|
unsigned int short_ct [mvnum_short_hp];
|
|
unsigned int short_bct [mvnum_short_hp-1] [2];
|
|
|
|
vp8_prob Pnew [MVPcount_hp];
|
|
|
|
(void) rc;
|
|
vp8_copy_array(Pnew, default_mvc, MVPcount_hp);
|
|
|
|
vp8_zero(is_short_ct)
|
|
vp8_zero(sign_ct)
|
|
vp8_zero(bit_ct)
|
|
vp8_zero(short_ct)
|
|
vp8_zero(short_bct)
|
|
|
|
|
|
//j=0
|
|
{
|
|
const int c = events [mv_max_hp];
|
|
|
|
is_short_ct [0] += c; // Short vector
|
|
short_ct [0] += c; // Magnitude distribution
|
|
}
|
|
|
|
//j: 1 ~ mv_max (1023)
|
|
{
|
|
int j = 1;
|
|
|
|
do
|
|
{
|
|
const int c1 = events [mv_max_hp + j]; //positive
|
|
const int c2 = events [mv_max_hp - j]; //negative
|
|
const int c = c1 + c2;
|
|
int a = j;
|
|
|
|
sign_ct [0] += c1;
|
|
sign_ct [1] += c2;
|
|
|
|
if (a < mvnum_short_hp)
|
|
{
|
|
is_short_ct [0] += c; // Short vector
|
|
short_ct [a] += c; // Magnitude distribution
|
|
}
|
|
else
|
|
{
|
|
int k = mvlong_width_hp - 1;
|
|
is_short_ct [1] += c; // Long vector
|
|
|
|
/* bit 3 not always encoded. */
|
|
do
|
|
bit_ct [k] [(a >> k) & 1] += c;
|
|
|
|
while (--k >= 0);
|
|
}
|
|
}
|
|
while (++j <= mv_max_hp);
|
|
}
|
|
|
|
calc_prob(Pnew + mvpis_short_hp, is_short_ct);
|
|
|
|
calc_prob(Pnew + MVPsign_hp, sign_ct);
|
|
|
|
{
|
|
vp8_prob p [mvnum_short_hp - 1]; /* actually only need branch ct */
|
|
int j = 0;
|
|
|
|
vp8_tree_probs_from_distribution(
|
|
mvnum_short_hp, vp8_small_mvencodings_hp, vp8_small_mvtree_hp,
|
|
p, short_bct, short_ct,
|
|
256, 1
|
|
);
|
|
|
|
do
|
|
calc_prob(Pnew + MVPshort_hp + j, short_bct[j]);
|
|
|
|
while (++j < mvnum_short_hp - 1);
|
|
}
|
|
|
|
{
|
|
int j = 0;
|
|
|
|
do
|
|
calc_prob(Pnew + MVPbits_hp + j, bit_ct[j]);
|
|
|
|
while (++j < mvlong_width_hp);
|
|
}
|
|
|
|
update(w, is_short_ct, Pcur + mvpis_short_hp, Pnew[mvpis_short_hp],
|
|
*Pupdate++, updated);
|
|
|
|
update(w, sign_ct, Pcur + MVPsign_hp, Pnew[MVPsign_hp], *Pupdate++,
|
|
updated);
|
|
|
|
{
|
|
const vp8_prob *const new_p = Pnew + MVPshort_hp;
|
|
vp8_prob *const cur_p = Pcur + MVPshort_hp;
|
|
|
|
int j = 0;
|
|
|
|
do
|
|
|
|
update(w, short_bct[j], cur_p + j, new_p[j], *Pupdate++, updated);
|
|
|
|
while (++j < mvnum_short_hp - 1);
|
|
}
|
|
|
|
{
|
|
const vp8_prob *const new_p = Pnew + MVPbits_hp;
|
|
vp8_prob *const cur_p = Pcur + MVPbits_hp;
|
|
|
|
int j = 0;
|
|
|
|
do
|
|
|
|
update(w, bit_ct[j], cur_p + j, new_p[j], *Pupdate++, updated);
|
|
|
|
while (++j < mvlong_width_hp);
|
|
}
|
|
}
|
|
|
|
void vp8_write_mvprobs_hp(VP8_COMP *cpi)
|
|
{
|
|
vp8_writer *const w = & cpi->bc;
|
|
MV_CONTEXT_HP *mvc = cpi->common.fc.mvc_hp;
|
|
int flags[2] = {0, 0};
|
|
#ifdef ENTROPY_STATS
|
|
active_section = 4;
|
|
#endif
|
|
write_component_probs_hp(
|
|
w, &mvc[0], &vp8_default_mv_context_hp[0], &vp8_mv_update_probs_hp[0],
|
|
cpi->MVcount_hp[0], 0, &flags[0]
|
|
);
|
|
write_component_probs_hp(
|
|
w, &mvc[1], &vp8_default_mv_context_hp[1], &vp8_mv_update_probs_hp[1],
|
|
cpi->MVcount_hp[1], 1, &flags[1]
|
|
);
|
|
|
|
if (flags[0] || flags[1])
|
|
vp8_build_component_cost_table_hp(cpi->mb.mvcost_hp,
|
|
(const MV_CONTEXT_HP *)
|
|
cpi->common.fc.mvc_hp, flags);
|
|
|
|
#ifdef ENTROPY_STATS
|
|
active_section = 5;
|
|
#endif
|
|
}
|
|
#endif /* CONFIG_HIGH_PRECISION_MV */
|