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-rw-r--r--libavcodec/motion_est.c517
1 files changed, 517 insertions, 0 deletions
diff --git a/libavcodec/motion_est.c b/libavcodec/motion_est.c
new file mode 100644
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+++ b/libavcodec/motion_est.c
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+/*
+ * 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;
+ }
+#ifdef CONFIG_MMX
+ if (mm_flags & MM_MMX)
+ emms();
+#endif
+
+ /* 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
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