- if(level != 0) {
- i += run;
- j = scantable[i];
- level= ((level*2+1)*qscale)>>1;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
+ /* motion vectors */
+ s->mv_dir = (mb_type >> 13) & 3;
+ av_dlog(s->avctx, "motion_type=%d\n", motion_type);
+ switch (motion_type) {
+ case MT_FRAME: /* or MT_16X8 */
+ if (s->picture_structure == PICT_FRAME) {
+ mb_type |= MB_TYPE_16x16;
+ s->mv_type = MV_TYPE_16X16;
+ for (i = 0; i < 2; i++) {
+ if (USES_LIST(mb_type, i)) {
+ /* MT_FRAME */
+ s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
+ mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
+ s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
+ mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
+ /* full_pel: only for MPEG-1 */
+ if (s->full_pel[i]) {
+ s->mv[i][0][0] <<= 1;
+ s->mv[i][0][1] <<= 1;
+ }
+ }
+ }
+ } else {
+ mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
+ s->mv_type = MV_TYPE_16X8;
+ for (i = 0; i < 2; i++) {
+ if (USES_LIST(mb_type, i)) {
+ /* MT_16X8 */
+ for (j = 0; j < 2; j++) {
+ s->field_select[i][j] = get_bits1(&s->gb);
+ for (k = 0; k < 2; k++) {
+ val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
+ s->last_mv[i][j][k]);
+ s->last_mv[i][j][k] = val;
+ s->mv[i][j][k] = val;
+ }
+ }
+ }
+ }
+ }
+ break;
+ case MT_FIELD:
+ s->mv_type = MV_TYPE_FIELD;
+ if (s->picture_structure == PICT_FRAME) {
+ mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
+ for (i = 0; i < 2; i++) {
+ if (USES_LIST(mb_type, i)) {
+ for (j = 0; j < 2; j++) {
+ s->field_select[i][j] = get_bits1(&s->gb);
+ val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
+ s->last_mv[i][j][0]);
+ s->last_mv[i][j][0] = val;
+ s->mv[i][j][0] = val;
+ av_dlog(s->avctx, "fmx=%d\n", val);
+ val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
+ s->last_mv[i][j][1] >> 1);
+ s->last_mv[i][j][1] = val << 1;
+ s->mv[i][j][1] = val;
+ av_dlog(s->avctx, "fmy=%d\n", val);
+ }
+ }
+ }
+ } else {
+ mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
+ for (i = 0; i < 2; i++) {
+ if (USES_LIST(mb_type, i)) {
+ s->field_select[i][0] = get_bits1(&s->gb);
+ for (k = 0; k < 2; k++) {
+ val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
+ s->last_mv[i][0][k]);
+ s->last_mv[i][0][k] = val;
+ s->last_mv[i][1][k] = val;
+ s->mv[i][0][k] = val;
+ }
+ }
+ }
+ }
+ break;
+ case MT_DMV:
+ s->mv_type = MV_TYPE_DMV;
+ for (i = 0; i < 2; i++) {
+ if (USES_LIST(mb_type, i)) {
+ int dmx, dmy, mx, my, m;
+ const int my_shift = s->picture_structure == PICT_FRAME;
+
+ mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
+ s->last_mv[i][0][0]);
+ s->last_mv[i][0][0] = mx;
+ s->last_mv[i][1][0] = mx;
+ dmx = get_dmv(s);
+ my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
+ s->last_mv[i][0][1] >> my_shift);
+ dmy = get_dmv(s);