515 lines
12 KiB
C
515 lines
12 KiB
C
/*
|
|
* Motion estimation
|
|
* Copyright (c) 2000,2001 Gerard Lantau.
|
|
*
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include "avcodec.h"
|
|
#include "dsputil.h"
|
|
#include "mpegvideo.h"
|
|
|
|
static void halfpel_motion_search(MpegEncContext * s,
|
|
int *mx_ptr, int *my_ptr, int dmin,
|
|
int xmin, int ymin, int xmax, int ymax);
|
|
|
|
/* config it to test motion vector encoding (send random vectors) */
|
|
//#define CONFIG_TEST_MV_ENCODE
|
|
|
|
static int pix_sum(UINT8 * pix, int line_size)
|
|
{
|
|
int s, i, j;
|
|
|
|
s = 0;
|
|
for (i = 0; i < 16; i++) {
|
|
for (j = 0; j < 16; j += 8) {
|
|
s += pix[0];
|
|
s += pix[1];
|
|
s += pix[2];
|
|
s += pix[3];
|
|
s += pix[4];
|
|
s += pix[5];
|
|
s += pix[6];
|
|
s += pix[7];
|
|
pix += 8;
|
|
}
|
|
pix += line_size - 16;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
static int pix_norm1(UINT8 * pix, int line_size)
|
|
{
|
|
int s, i, j;
|
|
UINT32 *sq = squareTbl + 256;
|
|
|
|
s = 0;
|
|
for (i = 0; i < 16; i++) {
|
|
for (j = 0; j < 16; j += 8) {
|
|
s += sq[pix[0]];
|
|
s += sq[pix[1]];
|
|
s += sq[pix[2]];
|
|
s += sq[pix[3]];
|
|
s += sq[pix[4]];
|
|
s += sq[pix[5]];
|
|
s += sq[pix[6]];
|
|
s += sq[pix[7]];
|
|
pix += 8;
|
|
}
|
|
pix += line_size - 16;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
static int pix_norm(UINT8 * pix1, UINT8 * pix2, int line_size)
|
|
{
|
|
int s, i, j;
|
|
UINT32 *sq = squareTbl + 256;
|
|
|
|
s = 0;
|
|
for (i = 0; i < 16; i++) {
|
|
for (j = 0; j < 16; j += 8) {
|
|
s += sq[pix1[0] - pix2[0]];
|
|
s += sq[pix1[1] - pix2[1]];
|
|
s += sq[pix1[2] - pix2[2]];
|
|
s += sq[pix1[3] - pix2[3]];
|
|
s += sq[pix1[4] - pix2[4]];
|
|
s += sq[pix1[5] - pix2[5]];
|
|
s += sq[pix1[6] - pix2[6]];
|
|
s += sq[pix1[7] - pix2[7]];
|
|
pix1 += 8;
|
|
pix2 += 8;
|
|
}
|
|
pix1 += line_size - 16;
|
|
pix2 += line_size - 16;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
static void no_motion_search(MpegEncContext * s,
|
|
int *mx_ptr, int *my_ptr)
|
|
{
|
|
*mx_ptr = 16 * s->mb_x;
|
|
*my_ptr = 16 * s->mb_y;
|
|
}
|
|
|
|
static int full_motion_search(MpegEncContext * s,
|
|
int *mx_ptr, int *my_ptr, int range,
|
|
int xmin, int ymin, int xmax, int ymax)
|
|
{
|
|
int x1, y1, x2, y2, xx, yy, x, y;
|
|
int mx, my, dmin, d;
|
|
UINT8 *pix;
|
|
|
|
xx = 16 * s->mb_x;
|
|
yy = 16 * s->mb_y;
|
|
x1 = xx - range + 1; /* we loose one pixel to avoid boundary pb with half pixel pred */
|
|
if (x1 < xmin)
|
|
x1 = xmin;
|
|
x2 = xx + range - 1;
|
|
if (x2 > xmax)
|
|
x2 = xmax;
|
|
y1 = yy - range + 1;
|
|
if (y1 < ymin)
|
|
y1 = ymin;
|
|
y2 = yy + range - 1;
|
|
if (y2 > ymax)
|
|
y2 = ymax;
|
|
pix = s->new_picture[0] + (yy * s->linesize) + xx;
|
|
dmin = 0x7fffffff;
|
|
mx = 0;
|
|
my = 0;
|
|
for (y = y1; y <= y2; y++) {
|
|
for (x = x1; x <= x2; x++) {
|
|
d = pix_abs16x16(pix, s->last_picture[0] + (y * s->linesize) + x,
|
|
s->linesize, 16);
|
|
if (d < dmin ||
|
|
(d == dmin &&
|
|
(abs(x - xx) + abs(y - yy)) <
|
|
(abs(mx - xx) + abs(my - yy)))) {
|
|
dmin = d;
|
|
mx = x;
|
|
my = y;
|
|
}
|
|
}
|
|
}
|
|
|
|
*mx_ptr = mx;
|
|
*my_ptr = my;
|
|
|
|
#if 0
|
|
if (*mx_ptr < -(2 * range) || *mx_ptr >= (2 * range) ||
|
|
*my_ptr < -(2 * range) || *my_ptr >= (2 * range)) {
|
|
fprintf(stderr, "error %d %d\n", *mx_ptr, *my_ptr);
|
|
}
|
|
#endif
|
|
return dmin;
|
|
}
|
|
|
|
|
|
static int log_motion_search(MpegEncContext * s,
|
|
int *mx_ptr, int *my_ptr, int range,
|
|
int xmin, int ymin, int xmax, int ymax)
|
|
{
|
|
int x1, y1, x2, y2, xx, yy, x, y;
|
|
int mx, my, dmin, d;
|
|
UINT8 *pix;
|
|
|
|
xx = s->mb_x << 4;
|
|
yy = s->mb_y << 4;
|
|
|
|
/* Left limit */
|
|
x1 = xx - range;
|
|
if (x1 < xmin)
|
|
x1 = xmin;
|
|
|
|
/* Right limit */
|
|
x2 = xx + range;
|
|
if (x2 > xmax)
|
|
x2 = xmax;
|
|
|
|
/* Upper limit */
|
|
y1 = yy - range;
|
|
if (y1 < ymin)
|
|
y1 = ymin;
|
|
|
|
/* Lower limit */
|
|
y2 = yy + range;
|
|
if (y2 > ymax)
|
|
y2 = ymax;
|
|
|
|
pix = s->new_picture[0] + (yy * s->linesize) + xx;
|
|
dmin = 0x7fffffff;
|
|
mx = 0;
|
|
my = 0;
|
|
|
|
do {
|
|
for (y = y1; y <= y2; y += range) {
|
|
for (x = x1; x <= x2; x += range) {
|
|
d = pix_abs16x16(pix, s->last_picture[0] + (y * s->linesize) + x, s->linesize, 16);
|
|
if (d < dmin || (d == dmin && (abs(x - xx) + abs(y - yy)) < (abs(mx - xx) + abs(my - yy)))) {
|
|
dmin = d;
|
|
mx = x;
|
|
my = y;
|
|
}
|
|
}
|
|
}
|
|
|
|
range = range >> 1;
|
|
|
|
x1 = mx - range;
|
|
if (x1 < xmin)
|
|
x1 = xmin;
|
|
|
|
x2 = mx + range;
|
|
if (x2 > xmax)
|
|
x2 = xmax;
|
|
|
|
y1 = my - range;
|
|
if (y1 < ymin)
|
|
y1 = ymin;
|
|
|
|
y2 = my + range;
|
|
if (y2 > ymax)
|
|
y2 = ymax;
|
|
|
|
} while (range >= 1);
|
|
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "log - MX: %d\tMY: %d\n", mx, my);
|
|
#endif
|
|
*mx_ptr = mx;
|
|
*my_ptr = my;
|
|
return dmin;
|
|
}
|
|
|
|
static int phods_motion_search(MpegEncContext * s,
|
|
int *mx_ptr, int *my_ptr, int range,
|
|
int xmin, int ymin, int xmax, int ymax)
|
|
{
|
|
int x1, y1, x2, y2, xx, yy, x, y, lastx, d;
|
|
int mx, my, dminx, dminy;
|
|
UINT8 *pix;
|
|
|
|
xx = s->mb_x << 4;
|
|
yy = s->mb_y << 4;
|
|
|
|
/* Left limit */
|
|
x1 = xx - range;
|
|
if (x1 < xmin)
|
|
x1 = xmin;
|
|
|
|
/* Right limit */
|
|
x2 = xx + range;
|
|
if (x2 > xmax)
|
|
x2 = xmax;
|
|
|
|
/* Upper limit */
|
|
y1 = yy - range;
|
|
if (y1 < ymin)
|
|
y1 = ymin;
|
|
|
|
/* Lower limit */
|
|
y2 = yy + range;
|
|
if (y2 > ymax)
|
|
y2 = ymax;
|
|
|
|
pix = s->new_picture[0] + (yy * s->linesize) + xx;
|
|
mx = 0;
|
|
my = 0;
|
|
|
|
x = xx;
|
|
y = yy;
|
|
do {
|
|
dminx = 0x7fffffff;
|
|
dminy = 0x7fffffff;
|
|
|
|
lastx = x;
|
|
for (x = x1; x <= x2; x += range) {
|
|
d = pix_abs16x16(pix, s->last_picture[0] + (y * s->linesize) + x, s->linesize, 16);
|
|
if (d < dminx || (d == dminx && (abs(x - xx) + abs(y - yy)) < (abs(mx - xx) + abs(my - yy)))) {
|
|
dminx = d;
|
|
mx = x;
|
|
}
|
|
}
|
|
|
|
x = lastx;
|
|
for (y = y1; y <= y2; y += range) {
|
|
d = pix_abs16x16(pix, s->last_picture[0] + (y * s->linesize) + x, s->linesize, 16);
|
|
if (d < dminy || (d == dminy && (abs(x - xx) + abs(y - yy)) < (abs(mx - xx) + abs(my - yy)))) {
|
|
dminy = d;
|
|
my = y;
|
|
}
|
|
}
|
|
|
|
range = range >> 1;
|
|
|
|
x = mx;
|
|
y = my;
|
|
x1 = mx - range;
|
|
if (x1 < xmin)
|
|
x1 = xmin;
|
|
|
|
x2 = mx + range;
|
|
if (x2 > xmax)
|
|
x2 = xmax;
|
|
|
|
y1 = my - range;
|
|
if (y1 < ymin)
|
|
y1 = ymin;
|
|
|
|
y2 = my + range;
|
|
if (y2 > ymax)
|
|
y2 = ymax;
|
|
|
|
} while (range >= 1);
|
|
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "phods - MX: %d\tMY: %d\n", mx, my);
|
|
#endif
|
|
|
|
/* half pixel search */
|
|
*mx_ptr = mx;
|
|
*my_ptr = my;
|
|
return dminy;
|
|
}
|
|
|
|
/* The idea would be to make half pel ME after Inter/Intra decision to
|
|
save time. */
|
|
static void halfpel_motion_search(MpegEncContext * s,
|
|
int *mx_ptr, int *my_ptr, int dmin,
|
|
int xmin, int ymin, int xmax, int ymax)
|
|
{
|
|
int mx, my, mx1, my1, d, xx, yy, dminh;
|
|
UINT8 *pix;
|
|
|
|
mx = *mx_ptr << 1;
|
|
my = *my_ptr << 1;
|
|
|
|
xx = 16 * s->mb_x;
|
|
yy = 16 * s->mb_y;
|
|
|
|
dminh = dmin;
|
|
|
|
/* Half pixel search */
|
|
mx1 = mx;
|
|
my1 = my;
|
|
|
|
pix = s->new_picture[0] + (yy * s->linesize) + xx;
|
|
|
|
if ((mx > (xmin << 1)) && mx < (xmax << 1) &&
|
|
(my > (ymin << 1)) && my < (ymax << 1)) {
|
|
int dx, dy, px, py;
|
|
UINT8 *ptr;
|
|
for (dy = -1; dy <= 1; dy++) {
|
|
for (dx = -1; dx <= 1; dx++) {
|
|
if (dx != 0 || dy != 0) {
|
|
px = mx1 + dx;
|
|
py = my1 + dy;
|
|
ptr = s->last_picture[0] + ((py >> 1) * s->linesize) + (px >> 1);
|
|
switch (((py & 1) << 1) | (px & 1)) {
|
|
default:
|
|
case 0:
|
|
d = pix_abs16x16(pix, ptr, s->linesize, 16);
|
|
break;
|
|
case 1:
|
|
d = pix_abs16x16_x2(pix, ptr, s->linesize, 16);
|
|
break;
|
|
case 2:
|
|
d = pix_abs16x16_y2(pix, ptr, s->linesize, 16);
|
|
break;
|
|
case 3:
|
|
d = pix_abs16x16_xy2(pix, ptr, s->linesize, 16);
|
|
break;
|
|
}
|
|
if (d < dminh) {
|
|
dminh = d;
|
|
mx = px;
|
|
my = py;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
*mx_ptr = mx - (xx << 1);
|
|
*my_ptr = my - (yy << 1);
|
|
//fprintf(stderr,"half - MX: %d\tMY: %d\n",*mx_ptr ,*my_ptr);
|
|
}
|
|
|
|
#ifndef CONFIG_TEST_MV_ENCODE
|
|
|
|
int estimate_motion(MpegEncContext * s,
|
|
int mb_x, int mb_y,
|
|
int *mx_ptr, int *my_ptr)
|
|
{
|
|
UINT8 *pix, *ppix;
|
|
int sum, varc, vard, mx, my, range, dmin, xx, yy;
|
|
int xmin, ymin, xmax, ymax;
|
|
|
|
range = 8 * (1 << (s->f_code - 1));
|
|
/* XXX: temporary kludge to avoid overflow for msmpeg4 */
|
|
if (s->out_format == FMT_H263 && !s->h263_msmpeg4)
|
|
range = range * 2;
|
|
|
|
if (s->unrestricted_mv) {
|
|
xmin = -16;
|
|
ymin = -16;
|
|
xmax = s->width;
|
|
ymax = s->height;
|
|
} else {
|
|
xmin = 0;
|
|
ymin = 0;
|
|
xmax = s->width - 16;
|
|
ymax = s->height - 16;
|
|
}
|
|
|
|
switch(s->full_search) {
|
|
case ME_ZERO:
|
|
default:
|
|
no_motion_search(s, &mx, &my);
|
|
dmin = 0;
|
|
break;
|
|
case ME_FULL:
|
|
dmin = full_motion_search(s, &mx, &my, range, xmin, ymin, xmax, ymax);
|
|
break;
|
|
case ME_LOG:
|
|
dmin = log_motion_search(s, &mx, &my, range / 2, xmin, ymin, xmax, ymax);
|
|
break;
|
|
case ME_PHODS:
|
|
dmin = phods_motion_search(s, &mx, &my, range / 2, xmin, ymin, xmax, ymax);
|
|
break;
|
|
}
|
|
emms_c();
|
|
|
|
/* intra / predictive decision */
|
|
xx = mb_x * 16;
|
|
yy = mb_y * 16;
|
|
|
|
pix = s->new_picture[0] + (yy * s->linesize) + xx;
|
|
/* At this point (mx,my) are full-pell and the absolute displacement */
|
|
ppix = s->last_picture[0] + (my * s->linesize) + mx;
|
|
|
|
sum = pix_sum(pix, s->linesize);
|
|
varc = pix_norm1(pix, s->linesize);
|
|
vard = pix_norm(pix, ppix, s->linesize);
|
|
|
|
vard = vard >> 8;
|
|
sum = sum >> 8;
|
|
varc = (varc >> 8) - (sum * sum);
|
|
#if 0
|
|
printf("varc=%d (sum=%d) vard=%d mx=%d my=%d\n",
|
|
varc, sum, vard, mx - xx, my - yy);
|
|
#endif
|
|
if (vard <= 64 || vard < varc) {
|
|
if (s->full_search != ME_ZERO) {
|
|
halfpel_motion_search(s, &mx, &my, dmin, xmin, ymin, xmax, ymax);
|
|
} else {
|
|
mx -= 16 * s->mb_x;
|
|
my -= 16 * s->mb_y;
|
|
}
|
|
*mx_ptr = mx;
|
|
*my_ptr = my;
|
|
return 0;
|
|
} else {
|
|
*mx_ptr = 0;
|
|
*my_ptr = 0;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
/* test version which generates valid random vectors */
|
|
int estimate_motion(MpegEncContext * s,
|
|
int mb_x, int mb_y,
|
|
int *mx_ptr, int *my_ptr)
|
|
{
|
|
int xx, yy, x1, y1, x2, y2, range;
|
|
|
|
if ((random() % 10) >= 5) {
|
|
range = 8 * (1 << (s->f_code - 1));
|
|
if (s->out_format == FMT_H263 && !s->h263_msmpeg4)
|
|
range = range * 2;
|
|
|
|
xx = 16 * s->mb_x;
|
|
yy = 16 * s->mb_y;
|
|
x1 = xx - range;
|
|
if (x1 < 0)
|
|
x1 = 0;
|
|
x2 = xx + range - 1;
|
|
if (x2 > (s->width - 16))
|
|
x2 = s->width - 16;
|
|
y1 = yy - range;
|
|
if (y1 < 0)
|
|
y1 = 0;
|
|
y2 = yy + range - 1;
|
|
if (y2 > (s->height - 16))
|
|
y2 = s->height - 16;
|
|
|
|
*mx_ptr = (random() % (2 * (x2 - x1 + 1))) + 2 * (x1 - xx);
|
|
*my_ptr = (random() % (2 * (y2 - y1 + 1))) + 2 * (y1 - yy);
|
|
return 0;
|
|
} else {
|
|
*mx_ptr = 0;
|
|
*my_ptr = 0;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
#endif
|