| /* |
| * VC-1 and WMV3 decoder |
| * Copyright (c) 2011 Mashiat Sarker Shakkhar |
| * Copyright (c) 2006-2007 Konstantin Shishkov |
| * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * VC-1 and WMV3 block decoding routines |
| */ |
| |
| #include "mathops.h" |
| #include "mpegutils.h" |
| #include "mpegvideo.h" |
| #include "vc1.h" |
| #include "vc1_pred.h" |
| #include "vc1data.h" |
| |
| static av_always_inline int scaleforsame_x(VC1Context *v, int n /* MV */, int dir) |
| { |
| int scaledvalue, refdist; |
| int scalesame1, scalesame2; |
| int scalezone1_x, zone1offset_x; |
| int table_index = dir ^ v->second_field; |
| |
| if (v->s.pict_type != AV_PICTURE_TYPE_B) |
| refdist = v->refdist; |
| else |
| refdist = dir ? v->brfd : v->frfd; |
| if (refdist > 3) |
| refdist = 3; |
| scalesame1 = ff_vc1_field_mvpred_scales[table_index][1][refdist]; |
| scalesame2 = ff_vc1_field_mvpred_scales[table_index][2][refdist]; |
| scalezone1_x = ff_vc1_field_mvpred_scales[table_index][3][refdist]; |
| zone1offset_x = ff_vc1_field_mvpred_scales[table_index][5][refdist]; |
| |
| if (FFABS(n) > 255) |
| scaledvalue = n; |
| else { |
| if (FFABS(n) < scalezone1_x) |
| scaledvalue = (n * scalesame1) >> 8; |
| else { |
| if (n < 0) |
| scaledvalue = ((n * scalesame2) >> 8) - zone1offset_x; |
| else |
| scaledvalue = ((n * scalesame2) >> 8) + zone1offset_x; |
| } |
| } |
| return av_clip(scaledvalue, -v->range_x, v->range_x - 1); |
| } |
| |
| static av_always_inline int scaleforsame_y(VC1Context *v, int i, int n /* MV */, int dir) |
| { |
| int scaledvalue, refdist; |
| int scalesame1, scalesame2; |
| int scalezone1_y, zone1offset_y; |
| int table_index = dir ^ v->second_field; |
| |
| if (v->s.pict_type != AV_PICTURE_TYPE_B) |
| refdist = v->refdist; |
| else |
| refdist = dir ? v->brfd : v->frfd; |
| if (refdist > 3) |
| refdist = 3; |
| scalesame1 = ff_vc1_field_mvpred_scales[table_index][1][refdist]; |
| scalesame2 = ff_vc1_field_mvpred_scales[table_index][2][refdist]; |
| scalezone1_y = ff_vc1_field_mvpred_scales[table_index][4][refdist]; |
| zone1offset_y = ff_vc1_field_mvpred_scales[table_index][6][refdist]; |
| |
| if (FFABS(n) > 63) |
| scaledvalue = n; |
| else { |
| if (FFABS(n) < scalezone1_y) |
| scaledvalue = (n * scalesame1) >> 8; |
| else { |
| if (n < 0) |
| scaledvalue = ((n * scalesame2) >> 8) - zone1offset_y; |
| else |
| scaledvalue = ((n * scalesame2) >> 8) + zone1offset_y; |
| } |
| } |
| |
| if (v->cur_field_type && !v->ref_field_type[dir]) |
| return av_clip(scaledvalue, -v->range_y / 2 + 1, v->range_y / 2); |
| else |
| return av_clip(scaledvalue, -v->range_y / 2, v->range_y / 2 - 1); |
| } |
| |
| static av_always_inline int scaleforopp_x(VC1Context *v, int n /* MV */) |
| { |
| int scalezone1_x, zone1offset_x; |
| int scaleopp1, scaleopp2, brfd; |
| int scaledvalue; |
| |
| brfd = FFMIN(v->brfd, 3); |
| scalezone1_x = ff_vc1_b_field_mvpred_scales[3][brfd]; |
| zone1offset_x = ff_vc1_b_field_mvpred_scales[5][brfd]; |
| scaleopp1 = ff_vc1_b_field_mvpred_scales[1][brfd]; |
| scaleopp2 = ff_vc1_b_field_mvpred_scales[2][brfd]; |
| |
| if (FFABS(n) > 255) |
| scaledvalue = n; |
| else { |
| if (FFABS(n) < scalezone1_x) |
| scaledvalue = (n * scaleopp1) >> 8; |
| else { |
| if (n < 0) |
| scaledvalue = ((n * scaleopp2) >> 8) - zone1offset_x; |
| else |
| scaledvalue = ((n * scaleopp2) >> 8) + zone1offset_x; |
| } |
| } |
| return av_clip(scaledvalue, -v->range_x, v->range_x - 1); |
| } |
| |
| static av_always_inline int scaleforopp_y(VC1Context *v, int n /* MV */, int dir) |
| { |
| int scalezone1_y, zone1offset_y; |
| int scaleopp1, scaleopp2, brfd; |
| int scaledvalue; |
| |
| brfd = FFMIN(v->brfd, 3); |
| scalezone1_y = ff_vc1_b_field_mvpred_scales[4][brfd]; |
| zone1offset_y = ff_vc1_b_field_mvpred_scales[6][brfd]; |
| scaleopp1 = ff_vc1_b_field_mvpred_scales[1][brfd]; |
| scaleopp2 = ff_vc1_b_field_mvpred_scales[2][brfd]; |
| |
| if (FFABS(n) > 63) |
| scaledvalue = n; |
| else { |
| if (FFABS(n) < scalezone1_y) |
| scaledvalue = (n * scaleopp1) >> 8; |
| else { |
| if (n < 0) |
| scaledvalue = ((n * scaleopp2) >> 8) - zone1offset_y; |
| else |
| scaledvalue = ((n * scaleopp2) >> 8) + zone1offset_y; |
| } |
| } |
| if (v->cur_field_type && !v->ref_field_type[dir]) { |
| return av_clip(scaledvalue, -v->range_y / 2 + 1, v->range_y / 2); |
| } else { |
| return av_clip(scaledvalue, -v->range_y / 2, v->range_y / 2 - 1); |
| } |
| } |
| |
| static av_always_inline int scaleforsame(VC1Context *v, int i, int n /* MV */, |
| int dim, int dir) |
| { |
| int brfd, scalesame; |
| int hpel = 1 - v->s.quarter_sample; |
| |
| n >>= hpel; |
| if (v->s.pict_type != AV_PICTURE_TYPE_B || v->second_field || !dir) { |
| if (dim) |
| n = scaleforsame_y(v, i, n, dir) * (1 << hpel); |
| else |
| n = scaleforsame_x(v, n, dir) * (1 << hpel); |
| return n; |
| } |
| brfd = FFMIN(v->brfd, 3); |
| scalesame = ff_vc1_b_field_mvpred_scales[0][brfd]; |
| |
| n = (n * scalesame >> 8) << hpel; |
| return n; |
| } |
| |
| static av_always_inline int scaleforopp(VC1Context *v, int n /* MV */, |
| int dim, int dir) |
| { |
| int refdist, scaleopp; |
| int hpel = 1 - v->s.quarter_sample; |
| |
| n >>= hpel; |
| if (v->s.pict_type == AV_PICTURE_TYPE_B && !v->second_field && dir == 1) { |
| if (dim) |
| n = scaleforopp_y(v, n, dir) << hpel; |
| else |
| n = scaleforopp_x(v, n) << hpel; |
| return n; |
| } |
| if (v->s.pict_type != AV_PICTURE_TYPE_B) |
| refdist = FFMIN(v->refdist, 3); |
| else |
| refdist = dir ? v->brfd : v->frfd; |
| scaleopp = ff_vc1_field_mvpred_scales[dir ^ v->second_field][0][refdist]; |
| |
| n = (n * scaleopp >> 8) * (1 << hpel); |
| return n; |
| } |
| |
| /** Predict and set motion vector |
| */ |
| void ff_vc1_pred_mv(VC1Context *v, int n, int dmv_x, int dmv_y, |
| int mv1, int r_x, int r_y, uint8_t* is_intra, |
| int pred_flag, int dir) |
| { |
| MpegEncContext *s = &v->s; |
| int xy, wrap, off = 0; |
| int16_t *A, *B, *C; |
| int px, py; |
| int sum; |
| int mixedmv_pic, num_samefield = 0, num_oppfield = 0; |
| int opposite, a_f, b_f, c_f; |
| int16_t field_predA[2]; |
| int16_t field_predB[2]; |
| int16_t field_predC[2]; |
| int a_valid, b_valid, c_valid; |
| int hybridmv_thresh, y_bias = 0; |
| |
| if (v->mv_mode == MV_PMODE_MIXED_MV || |
| ((v->mv_mode == MV_PMODE_INTENSITY_COMP) && (v->mv_mode2 == MV_PMODE_MIXED_MV))) |
| mixedmv_pic = 1; |
| else |
| mixedmv_pic = 0; |
| /* scale MV difference to be quad-pel */ |
| if (!s->quarter_sample) { |
| dmv_x *= 2; |
| dmv_y *= 2; |
| } |
| |
| wrap = s->b8_stride; |
| xy = s->block_index[n]; |
| |
| if (s->mb_intra) { |
| s->mv[0][n][0] = s->current_picture.motion_val[0][xy + v->blocks_off][0] = 0; |
| s->mv[0][n][1] = s->current_picture.motion_val[0][xy + v->blocks_off][1] = 0; |
| s->current_picture.motion_val[1][xy + v->blocks_off][0] = 0; |
| s->current_picture.motion_val[1][xy + v->blocks_off][1] = 0; |
| if (mv1) { /* duplicate motion data for 1-MV block */ |
| s->current_picture.motion_val[0][xy + 1 + v->blocks_off][0] = 0; |
| s->current_picture.motion_val[0][xy + 1 + v->blocks_off][1] = 0; |
| s->current_picture.motion_val[0][xy + wrap + v->blocks_off][0] = 0; |
| s->current_picture.motion_val[0][xy + wrap + v->blocks_off][1] = 0; |
| s->current_picture.motion_val[0][xy + wrap + 1 + v->blocks_off][0] = 0; |
| s->current_picture.motion_val[0][xy + wrap + 1 + v->blocks_off][1] = 0; |
| v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0; |
| s->current_picture.motion_val[1][xy + 1 + v->blocks_off][0] = 0; |
| s->current_picture.motion_val[1][xy + 1 + v->blocks_off][1] = 0; |
| s->current_picture.motion_val[1][xy + wrap][0] = 0; |
| s->current_picture.motion_val[1][xy + wrap + v->blocks_off][1] = 0; |
| s->current_picture.motion_val[1][xy + wrap + 1 + v->blocks_off][0] = 0; |
| s->current_picture.motion_val[1][xy + wrap + 1 + v->blocks_off][1] = 0; |
| } |
| return; |
| } |
| |
| C = s->current_picture.motion_val[dir][xy - 1 + v->blocks_off]; |
| A = s->current_picture.motion_val[dir][xy - wrap + v->blocks_off]; |
| if (mv1) { |
| if (v->field_mode && mixedmv_pic) |
| off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2; |
| else |
| off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2; |
| } else { |
| //in 4-MV mode different blocks have different B predictor position |
| switch (n) { |
| case 0: |
| off = (s->mb_x > 0) ? -1 : 1; |
| break; |
| case 1: |
| off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1; |
| break; |
| case 2: |
| off = 1; |
| break; |
| case 3: |
| off = -1; |
| } |
| } |
| B = s->current_picture.motion_val[dir][xy - wrap + off + v->blocks_off]; |
| |
| a_valid = !s->first_slice_line || (n == 2 || n == 3); |
| b_valid = a_valid && (s->mb_width > 1); |
| c_valid = s->mb_x || (n == 1 || n == 3); |
| if (v->field_mode) { |
| a_valid = a_valid && !is_intra[xy - wrap]; |
| b_valid = b_valid && !is_intra[xy - wrap + off]; |
| c_valid = c_valid && !is_intra[xy - 1]; |
| } |
| |
| if (a_valid) { |
| a_f = v->mv_f[dir][xy - wrap + v->blocks_off]; |
| num_oppfield += a_f; |
| num_samefield += 1 - a_f; |
| field_predA[0] = A[0]; |
| field_predA[1] = A[1]; |
| } else { |
| field_predA[0] = field_predA[1] = 0; |
| a_f = 0; |
| } |
| if (b_valid) { |
| b_f = v->mv_f[dir][xy - wrap + off + v->blocks_off]; |
| num_oppfield += b_f; |
| num_samefield += 1 - b_f; |
| field_predB[0] = B[0]; |
| field_predB[1] = B[1]; |
| } else { |
| field_predB[0] = field_predB[1] = 0; |
| b_f = 0; |
| } |
| if (c_valid) { |
| c_f = v->mv_f[dir][xy - 1 + v->blocks_off]; |
| num_oppfield += c_f; |
| num_samefield += 1 - c_f; |
| field_predC[0] = C[0]; |
| field_predC[1] = C[1]; |
| } else { |
| field_predC[0] = field_predC[1] = 0; |
| c_f = 0; |
| } |
| |
| if (v->field_mode) { |
| if (!v->numref) |
| // REFFIELD determines if the last field or the second-last field is |
| // to be used as reference |
| opposite = 1 - v->reffield; |
| else { |
| if (num_samefield <= num_oppfield) |
| opposite = 1 - pred_flag; |
| else |
| opposite = pred_flag; |
| } |
| } else |
| opposite = 0; |
| if (opposite) { |
| if (a_valid && !a_f) { |
| field_predA[0] = scaleforopp(v, field_predA[0], 0, dir); |
| field_predA[1] = scaleforopp(v, field_predA[1], 1, dir); |
| } |
| if (b_valid && !b_f) { |
| field_predB[0] = scaleforopp(v, field_predB[0], 0, dir); |
| field_predB[1] = scaleforopp(v, field_predB[1], 1, dir); |
| } |
| if (c_valid && !c_f) { |
| field_predC[0] = scaleforopp(v, field_predC[0], 0, dir); |
| field_predC[1] = scaleforopp(v, field_predC[1], 1, dir); |
| } |
| v->mv_f[dir][xy + v->blocks_off] = 1; |
| v->ref_field_type[dir] = !v->cur_field_type; |
| } else { |
| if (a_valid && a_f) { |
| field_predA[0] = scaleforsame(v, n, field_predA[0], 0, dir); |
| field_predA[1] = scaleforsame(v, n, field_predA[1], 1, dir); |
| } |
| if (b_valid && b_f) { |
| field_predB[0] = scaleforsame(v, n, field_predB[0], 0, dir); |
| field_predB[1] = scaleforsame(v, n, field_predB[1], 1, dir); |
| } |
| if (c_valid && c_f) { |
| field_predC[0] = scaleforsame(v, n, field_predC[0], 0, dir); |
| field_predC[1] = scaleforsame(v, n, field_predC[1], 1, dir); |
| } |
| v->mv_f[dir][xy + v->blocks_off] = 0; |
| v->ref_field_type[dir] = v->cur_field_type; |
| } |
| |
| if (a_valid) { |
| px = field_predA[0]; |
| py = field_predA[1]; |
| } else if (c_valid) { |
| px = field_predC[0]; |
| py = field_predC[1]; |
| } else if (b_valid) { |
| px = field_predB[0]; |
| py = field_predB[1]; |
| } else { |
| px = 0; |
| py = 0; |
| } |
| |
| if (num_samefield + num_oppfield > 1) { |
| px = mid_pred(field_predA[0], field_predB[0], field_predC[0]); |
| py = mid_pred(field_predA[1], field_predB[1], field_predC[1]); |
| } |
| |
| /* Pullback MV as specified in 8.3.5.3.4 */ |
| if (!v->field_mode) { |
| int qx, qy, X, Y; |
| int MV = mv1 ? -60 : -28; |
| qx = (s->mb_x << 6) + ((n == 1 || n == 3) ? 32 : 0); |
| qy = (s->mb_y << 6) + ((n == 2 || n == 3) ? 32 : 0); |
| X = (s->mb_width << 6) - 4; |
| Y = (s->mb_height << 6) - 4; |
| if (qx + px < MV) px = MV - qx; |
| if (qy + py < MV) py = MV - qy; |
| if (qx + px > X) px = X - qx; |
| if (qy + py > Y) py = Y - qy; |
| } |
| |
| if (!v->field_mode || s->pict_type != AV_PICTURE_TYPE_B) { |
| /* Calculate hybrid prediction as specified in 8.3.5.3.5 (also 10.3.5.4.3.5) */ |
| hybridmv_thresh = 32; |
| if (a_valid && c_valid) { |
| if (is_intra[xy - wrap]) |
| sum = FFABS(px) + FFABS(py); |
| else |
| sum = FFABS(px - field_predA[0]) + FFABS(py - field_predA[1]); |
| if (sum > hybridmv_thresh) { |
| if (get_bits1(&s->gb)) { // read HYBRIDPRED bit |
| px = field_predA[0]; |
| py = field_predA[1]; |
| } else { |
| px = field_predC[0]; |
| py = field_predC[1]; |
| } |
| } else { |
| if (is_intra[xy - 1]) |
| sum = FFABS(px) + FFABS(py); |
| else |
| sum = FFABS(px - field_predC[0]) + FFABS(py - field_predC[1]); |
| if (sum > hybridmv_thresh) { |
| if (get_bits1(&s->gb)) { |
| px = field_predA[0]; |
| py = field_predA[1]; |
| } else { |
| px = field_predC[0]; |
| py = field_predC[1]; |
| } |
| } |
| } |
| } |
| } |
| |
| if (v->field_mode && v->numref) |
| r_y >>= 1; |
| if (v->field_mode && v->cur_field_type && v->ref_field_type[dir] == 0) |
| y_bias = 1; |
| /* store MV using signed modulus of MV range defined in 4.11 */ |
| s->mv[dir][n][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x; |
| s->mv[dir][n][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1] = ((py + dmv_y + r_y - y_bias) & ((r_y << 1) - 1)) - r_y + y_bias; |
| if (mv1) { /* duplicate motion data for 1-MV block */ |
| s->current_picture.motion_val[dir][xy + 1 + v->blocks_off][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0]; |
| s->current_picture.motion_val[dir][xy + 1 + v->blocks_off][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1]; |
| s->current_picture.motion_val[dir][xy + wrap + v->blocks_off][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0]; |
| s->current_picture.motion_val[dir][xy + wrap + v->blocks_off][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1]; |
| s->current_picture.motion_val[dir][xy + wrap + 1 + v->blocks_off][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0]; |
| s->current_picture.motion_val[dir][xy + wrap + 1 + v->blocks_off][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1]; |
| v->mv_f[dir][xy + 1 + v->blocks_off] = v->mv_f[dir][xy + v->blocks_off]; |
| v->mv_f[dir][xy + wrap + v->blocks_off] = v->mv_f[dir][xy + wrap + 1 + v->blocks_off] = v->mv_f[dir][xy + v->blocks_off]; |
| } |
| } |
| |
| /** Predict and set motion vector for interlaced frame picture MBs |
| */ |
| void ff_vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y, |
| int mvn, int r_x, int r_y, uint8_t* is_intra, int dir) |
| { |
| MpegEncContext *s = &v->s; |
| int xy, wrap, off = 0; |
| int A[2], B[2], C[2]; |
| int px = 0, py = 0; |
| int a_valid = 0, b_valid = 0, c_valid = 0; |
| int field_a, field_b, field_c; // 0: same, 1: opposit |
| int total_valid, num_samefield, num_oppfield; |
| int pos_c, pos_b, n_adj; |
| |
| wrap = s->b8_stride; |
| xy = s->block_index[n]; |
| |
| if (s->mb_intra) { |
| s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0; |
| s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0; |
| s->current_picture.motion_val[1][xy][0] = 0; |
| s->current_picture.motion_val[1][xy][1] = 0; |
| if (mvn == 1) { /* duplicate motion data for 1-MV block */ |
| s->current_picture.motion_val[0][xy + 1][0] = 0; |
| s->current_picture.motion_val[0][xy + 1][1] = 0; |
| s->current_picture.motion_val[0][xy + wrap][0] = 0; |
| s->current_picture.motion_val[0][xy + wrap][1] = 0; |
| s->current_picture.motion_val[0][xy + wrap + 1][0] = 0; |
| s->current_picture.motion_val[0][xy + wrap + 1][1] = 0; |
| v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0; |
| s->current_picture.motion_val[1][xy + 1][0] = 0; |
| s->current_picture.motion_val[1][xy + 1][1] = 0; |
| s->current_picture.motion_val[1][xy + wrap][0] = 0; |
| s->current_picture.motion_val[1][xy + wrap][1] = 0; |
| s->current_picture.motion_val[1][xy + wrap + 1][0] = 0; |
| s->current_picture.motion_val[1][xy + wrap + 1][1] = 0; |
| } |
| return; |
| } |
| |
| off = ((n == 0) || (n == 1)) ? 1 : -1; |
| /* predict A */ |
| if (s->mb_x || (n == 1) || (n == 3)) { |
| if ((v->blk_mv_type[xy]) // current block (MB) has a field MV |
| || (!v->blk_mv_type[xy] && !v->blk_mv_type[xy - 1])) { // or both have frame MV |
| A[0] = s->current_picture.motion_val[dir][xy - 1][0]; |
| A[1] = s->current_picture.motion_val[dir][xy - 1][1]; |
| a_valid = 1; |
| } else { // current block has frame mv and cand. has field MV (so average) |
| A[0] = (s->current_picture.motion_val[dir][xy - 1][0] |
| + s->current_picture.motion_val[dir][xy - 1 + off * wrap][0] + 1) >> 1; |
| A[1] = (s->current_picture.motion_val[dir][xy - 1][1] |
| + s->current_picture.motion_val[dir][xy - 1 + off * wrap][1] + 1) >> 1; |
| a_valid = 1; |
| } |
| if (!(n & 1) && v->is_intra[s->mb_x - 1]) { |
| a_valid = 0; |
| A[0] = A[1] = 0; |
| } |
| } else |
| A[0] = A[1] = 0; |
| /* Predict B and C */ |
| B[0] = B[1] = C[0] = C[1] = 0; |
| if (n == 0 || n == 1 || v->blk_mv_type[xy]) { |
| if (!s->first_slice_line) { |
| if (!v->is_intra[s->mb_x - s->mb_stride]) { |
| b_valid = 1; |
| n_adj = n | 2; |
| pos_b = s->block_index[n_adj] - 2 * wrap; |
| if (v->blk_mv_type[pos_b] && v->blk_mv_type[xy]) { |
| n_adj = (n & 2) | (n & 1); |
| } |
| B[0] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap][0]; |
| B[1] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap][1]; |
| if (v->blk_mv_type[pos_b] && !v->blk_mv_type[xy]) { |
| B[0] = (B[0] + s->current_picture.motion_val[dir][s->block_index[n_adj ^ 2] - 2 * wrap][0] + 1) >> 1; |
| B[1] = (B[1] + s->current_picture.motion_val[dir][s->block_index[n_adj ^ 2] - 2 * wrap][1] + 1) >> 1; |
| } |
| } |
| if (s->mb_width > 1) { |
| if (!v->is_intra[s->mb_x - s->mb_stride + 1]) { |
| c_valid = 1; |
| n_adj = 2; |
| pos_c = s->block_index[2] - 2 * wrap + 2; |
| if (v->blk_mv_type[pos_c] && v->blk_mv_type[xy]) { |
| n_adj = n & 2; |
| } |
| C[0] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap + 2][0]; |
| C[1] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap + 2][1]; |
| if (v->blk_mv_type[pos_c] && !v->blk_mv_type[xy]) { |
| C[0] = (1 + C[0] + (s->current_picture.motion_val[dir][s->block_index[n_adj ^ 2] - 2 * wrap + 2][0])) >> 1; |
| C[1] = (1 + C[1] + (s->current_picture.motion_val[dir][s->block_index[n_adj ^ 2] - 2 * wrap + 2][1])) >> 1; |
| } |
| if (s->mb_x == s->mb_width - 1) { |
| if (!v->is_intra[s->mb_x - s->mb_stride - 1]) { |
| c_valid = 1; |
| n_adj = 3; |
| pos_c = s->block_index[3] - 2 * wrap - 2; |
| if (v->blk_mv_type[pos_c] && v->blk_mv_type[xy]) { |
| n_adj = n | 1; |
| } |
| C[0] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap - 2][0]; |
| C[1] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap - 2][1]; |
| if (v->blk_mv_type[pos_c] && !v->blk_mv_type[xy]) { |
| C[0] = (1 + C[0] + s->current_picture.motion_val[dir][s->block_index[1] - 2 * wrap - 2][0]) >> 1; |
| C[1] = (1 + C[1] + s->current_picture.motion_val[dir][s->block_index[1] - 2 * wrap - 2][1]) >> 1; |
| } |
| } else |
| c_valid = 0; |
| } |
| } |
| } |
| } |
| } else { |
| pos_b = s->block_index[1]; |
| b_valid = 1; |
| B[0] = s->current_picture.motion_val[dir][pos_b][0]; |
| B[1] = s->current_picture.motion_val[dir][pos_b][1]; |
| pos_c = s->block_index[0]; |
| c_valid = 1; |
| C[0] = s->current_picture.motion_val[dir][pos_c][0]; |
| C[1] = s->current_picture.motion_val[dir][pos_c][1]; |
| } |
| |
| total_valid = a_valid + b_valid + c_valid; |
| // check if predictor A is out of bounds |
| if (!s->mb_x && !(n == 1 || n == 3)) { |
| A[0] = A[1] = 0; |
| } |
| // check if predictor B is out of bounds |
| if ((s->first_slice_line && v->blk_mv_type[xy]) || (s->first_slice_line && !(n & 2))) { |
| B[0] = B[1] = C[0] = C[1] = 0; |
| } |
| if (!v->blk_mv_type[xy]) { |
| if (s->mb_width == 1) { |
| px = B[0]; |
| py = B[1]; |
| } else { |
| if (total_valid >= 2) { |
| px = mid_pred(A[0], B[0], C[0]); |
| py = mid_pred(A[1], B[1], C[1]); |
| } else if (total_valid) { |
| if (a_valid) { px = A[0]; py = A[1]; } |
| else if (b_valid) { px = B[0]; py = B[1]; } |
| else { px = C[0]; py = C[1]; } |
| } |
| } |
| } else { |
| if (a_valid) |
| field_a = (A[1] & 4) ? 1 : 0; |
| else |
| field_a = 0; |
| if (b_valid) |
| field_b = (B[1] & 4) ? 1 : 0; |
| else |
| field_b = 0; |
| if (c_valid) |
| field_c = (C[1] & 4) ? 1 : 0; |
| else |
| field_c = 0; |
| |
| num_oppfield = field_a + field_b + field_c; |
| num_samefield = total_valid - num_oppfield; |
| if (total_valid == 3) { |
| if ((num_samefield == 3) || (num_oppfield == 3)) { |
| px = mid_pred(A[0], B[0], C[0]); |
| py = mid_pred(A[1], B[1], C[1]); |
| } else if (num_samefield >= num_oppfield) { |
| /* take one MV from same field set depending on priority |
| the check for B may not be necessary */ |
| px = !field_a ? A[0] : B[0]; |
| py = !field_a ? A[1] : B[1]; |
| } else { |
| px = field_a ? A[0] : B[0]; |
| py = field_a ? A[1] : B[1]; |
| } |
| } else if (total_valid == 2) { |
| if (num_samefield >= num_oppfield) { |
| if (!field_a && a_valid) { |
| px = A[0]; |
| py = A[1]; |
| } else if (!field_b && b_valid) { |
| px = B[0]; |
| py = B[1]; |
| } else /*if (c_valid)*/ { |
| av_assert1(c_valid); |
| px = C[0]; |
| py = C[1]; |
| } |
| } else { |
| if (field_a && a_valid) { |
| px = A[0]; |
| py = A[1]; |
| } else /*if (field_b && b_valid)*/ { |
| av_assert1(field_b && b_valid); |
| px = B[0]; |
| py = B[1]; |
| } |
| } |
| } else if (total_valid == 1) { |
| px = (a_valid) ? A[0] : ((b_valid) ? B[0] : C[0]); |
| py = (a_valid) ? A[1] : ((b_valid) ? B[1] : C[1]); |
| } |
| } |
| |
| /* store MV using signed modulus of MV range defined in 4.11 */ |
| s->mv[dir][n][0] = s->current_picture.motion_val[dir][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x; |
| s->mv[dir][n][1] = s->current_picture.motion_val[dir][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y; |
| if (mvn == 1) { /* duplicate motion data for 1-MV block */ |
| s->current_picture.motion_val[dir][xy + 1 ][0] = s->current_picture.motion_val[dir][xy][0]; |
| s->current_picture.motion_val[dir][xy + 1 ][1] = s->current_picture.motion_val[dir][xy][1]; |
| s->current_picture.motion_val[dir][xy + wrap ][0] = s->current_picture.motion_val[dir][xy][0]; |
| s->current_picture.motion_val[dir][xy + wrap ][1] = s->current_picture.motion_val[dir][xy][1]; |
| s->current_picture.motion_val[dir][xy + wrap + 1][0] = s->current_picture.motion_val[dir][xy][0]; |
| s->current_picture.motion_val[dir][xy + wrap + 1][1] = s->current_picture.motion_val[dir][xy][1]; |
| } else if (mvn == 2) { /* duplicate motion data for 2-Field MV block */ |
| s->current_picture.motion_val[dir][xy + 1][0] = s->current_picture.motion_val[dir][xy][0]; |
| s->current_picture.motion_val[dir][xy + 1][1] = s->current_picture.motion_val[dir][xy][1]; |
| s->mv[dir][n + 1][0] = s->mv[dir][n][0]; |
| s->mv[dir][n + 1][1] = s->mv[dir][n][1]; |
| } |
| } |
| |
| void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], |
| int direct, int mvtype) |
| { |
| MpegEncContext *s = &v->s; |
| int xy, wrap, off = 0; |
| int16_t *A, *B, *C; |
| int px, py; |
| int sum; |
| int r_x, r_y; |
| const uint8_t *is_intra = v->mb_type[0]; |
| |
| av_assert0(!v->field_mode); |
| |
| r_x = v->range_x; |
| r_y = v->range_y; |
| /* scale MV difference to be quad-pel */ |
| if (!s->quarter_sample) { |
| dmv_x[0] *= 2; |
| dmv_y[0] *= 2; |
| dmv_x[1] *= 2; |
| dmv_y[1] *= 2; |
| } |
| |
| wrap = s->b8_stride; |
| xy = s->block_index[0]; |
| |
| if (s->mb_intra) { |
| s->current_picture.motion_val[0][xy][0] = |
| s->current_picture.motion_val[0][xy][1] = |
| s->current_picture.motion_val[1][xy][0] = |
| s->current_picture.motion_val[1][xy][1] = 0; |
| return; |
| } |
| if (direct && s->next_picture_ptr->field_picture) |
| av_log(s->avctx, AV_LOG_WARNING, "Mixed frame/field direct mode not supported\n"); |
| |
| s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample); |
| s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample); |
| s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample); |
| s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample); |
| |
| /* Pullback predicted motion vectors as specified in 8.4.5.4 */ |
| s->mv[0][0][0] = av_clip(s->mv[0][0][0], -60 - (s->mb_x << 6), (s->mb_width << 6) - 4 - (s->mb_x << 6)); |
| s->mv[0][0][1] = av_clip(s->mv[0][0][1], -60 - (s->mb_y << 6), (s->mb_height << 6) - 4 - (s->mb_y << 6)); |
| s->mv[1][0][0] = av_clip(s->mv[1][0][0], -60 - (s->mb_x << 6), (s->mb_width << 6) - 4 - (s->mb_x << 6)); |
| s->mv[1][0][1] = av_clip(s->mv[1][0][1], -60 - (s->mb_y << 6), (s->mb_height << 6) - 4 - (s->mb_y << 6)); |
| if (direct) { |
| s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0]; |
| s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1]; |
| s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0]; |
| s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1]; |
| return; |
| } |
| |
| if ((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) { |
| C = s->current_picture.motion_val[0][xy - 2]; |
| A = s->current_picture.motion_val[0][xy - wrap * 2]; |
| off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2; |
| B = s->current_picture.motion_val[0][xy - wrap * 2 + off]; |
| |
| if (!s->mb_x) C[0] = C[1] = 0; |
| if (!s->first_slice_line) { // predictor A is not out of bounds |
| if (s->mb_width == 1) { |
| px = A[0]; |
| py = A[1]; |
| } else { |
| px = mid_pred(A[0], B[0], C[0]); |
| py = mid_pred(A[1], B[1], C[1]); |
| } |
| } else if (s->mb_x) { // predictor C is not out of bounds |
| px = C[0]; |
| py = C[1]; |
| } else { |
| px = py = 0; |
| } |
| /* Pullback MV as specified in 8.3.5.3.4 */ |
| { |
| int qx, qy, X, Y; |
| int sh = v->profile < PROFILE_ADVANCED ? 5 : 6; |
| int MV = 4 - (1 << sh); |
| qx = (s->mb_x << sh); |
| qy = (s->mb_y << sh); |
| X = (s->mb_width << sh) - 4; |
| Y = (s->mb_height << sh) - 4; |
| if (qx + px < MV) px = MV - qx; |
| if (qy + py < MV) py = MV - qy; |
| if (qx + px > X) px = X - qx; |
| if (qy + py > Y) py = Y - qy; |
| } |
| /* Calculate hybrid prediction as specified in 8.3.5.3.5 */ |
| if (0 && !s->first_slice_line && s->mb_x) { |
| if (is_intra[xy - wrap]) |
| sum = FFABS(px) + FFABS(py); |
| else |
| sum = FFABS(px - A[0]) + FFABS(py - A[1]); |
| if (sum > 32) { |
| if (get_bits1(&s->gb)) { |
| px = A[0]; |
| py = A[1]; |
| } else { |
| px = C[0]; |
| py = C[1]; |
| } |
| } else { |
| if (is_intra[xy - 2]) |
| sum = FFABS(px) + FFABS(py); |
| else |
| sum = FFABS(px - C[0]) + FFABS(py - C[1]); |
| if (sum > 32) { |
| if (get_bits1(&s->gb)) { |
| px = A[0]; |
| py = A[1]; |
| } else { |
| px = C[0]; |
| py = C[1]; |
| } |
| } |
| } |
| } |
| /* store MV using signed modulus of MV range defined in 4.11 */ |
| s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x; |
| s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y; |
| } |
| if ((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) { |
| C = s->current_picture.motion_val[1][xy - 2]; |
| A = s->current_picture.motion_val[1][xy - wrap * 2]; |
| off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2; |
| B = s->current_picture.motion_val[1][xy - wrap * 2 + off]; |
| |
| if (!s->mb_x) |
| C[0] = C[1] = 0; |
| if (!s->first_slice_line) { // predictor A is not out of bounds |
| if (s->mb_width == 1) { |
| px = A[0]; |
| py = A[1]; |
| } else { |
| px = mid_pred(A[0], B[0], C[0]); |
| py = mid_pred(A[1], B[1], C[1]); |
| } |
| } else if (s->mb_x) { // predictor C is not out of bounds |
| px = C[0]; |
| py = C[1]; |
| } else { |
| px = py = 0; |
| } |
| /* Pullback MV as specified in 8.3.5.3.4 */ |
| { |
| int qx, qy, X, Y; |
| int sh = v->profile < PROFILE_ADVANCED ? 5 : 6; |
| int MV = 4 - (1 << sh); |
| qx = (s->mb_x << sh); |
| qy = (s->mb_y << sh); |
| X = (s->mb_width << sh) - 4; |
| Y = (s->mb_height << sh) - 4; |
| if (qx + px < MV) px = MV - qx; |
| if (qy + py < MV) py = MV - qy; |
| if (qx + px > X) px = X - qx; |
| if (qy + py > Y) py = Y - qy; |
| } |
| /* Calculate hybrid prediction as specified in 8.3.5.3.5 */ |
| if (0 && !s->first_slice_line && s->mb_x) { |
| if (is_intra[xy - wrap]) |
| sum = FFABS(px) + FFABS(py); |
| else |
| sum = FFABS(px - A[0]) + FFABS(py - A[1]); |
| if (sum > 32) { |
| if (get_bits1(&s->gb)) { |
| px = A[0]; |
| py = A[1]; |
| } else { |
| px = C[0]; |
| py = C[1]; |
| } |
| } else { |
| if (is_intra[xy - 2]) |
| sum = FFABS(px) + FFABS(py); |
| else |
| sum = FFABS(px - C[0]) + FFABS(py - C[1]); |
| if (sum > 32) { |
| if (get_bits1(&s->gb)) { |
| px = A[0]; |
| py = A[1]; |
| } else { |
| px = C[0]; |
| py = C[1]; |
| } |
| } |
| } |
| } |
| /* store MV using signed modulus of MV range defined in 4.11 */ |
| |
| s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x; |
| s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y; |
| } |
| s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0]; |
| s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1]; |
| s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0]; |
| s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1]; |
| } |
| |
| void ff_vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dmv_y, |
| int mv1, int *pred_flag) |
| { |
| int dir = (v->bmvtype == BMV_TYPE_BACKWARD) ? 1 : 0; |
| MpegEncContext *s = &v->s; |
| int mb_pos = s->mb_x + s->mb_y * s->mb_stride; |
| |
| if (v->bmvtype == BMV_TYPE_DIRECT) { |
| int total_opp, k, f; |
| if (s->next_picture.mb_type[mb_pos + v->mb_off] != MB_TYPE_INTRA) { |
| s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][0], |
| v->bfraction, 0, s->quarter_sample); |
| s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][1], |
| v->bfraction, 0, s->quarter_sample); |
| s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][0], |
| v->bfraction, 1, s->quarter_sample); |
| s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][1], |
| v->bfraction, 1, s->quarter_sample); |
| |
| total_opp = v->mv_f_next[0][s->block_index[0] + v->blocks_off] |
| + v->mv_f_next[0][s->block_index[1] + v->blocks_off] |
| + v->mv_f_next[0][s->block_index[2] + v->blocks_off] |
| + v->mv_f_next[0][s->block_index[3] + v->blocks_off]; |
| f = (total_opp > 2) ? 1 : 0; |
| } else { |
| s->mv[0][0][0] = s->mv[0][0][1] = 0; |
| s->mv[1][0][0] = s->mv[1][0][1] = 0; |
| f = 0; |
| } |
| v->ref_field_type[0] = v->ref_field_type[1] = v->cur_field_type ^ f; |
| for (k = 0; k < 4; k++) { |
| s->current_picture.motion_val[0][s->block_index[k] + v->blocks_off][0] = s->mv[0][0][0]; |
| s->current_picture.motion_val[0][s->block_index[k] + v->blocks_off][1] = s->mv[0][0][1]; |
| s->current_picture.motion_val[1][s->block_index[k] + v->blocks_off][0] = s->mv[1][0][0]; |
| s->current_picture.motion_val[1][s->block_index[k] + v->blocks_off][1] = s->mv[1][0][1]; |
| v->mv_f[0][s->block_index[k] + v->blocks_off] = f; |
| v->mv_f[1][s->block_index[k] + v->blocks_off] = f; |
| } |
| return; |
| } |
| if (v->bmvtype == BMV_TYPE_INTERPOLATED) { |
| ff_vc1_pred_mv(v, 0, dmv_x[0], dmv_y[0], 1, v->range_x, v->range_y, v->mb_type[0], pred_flag[0], 0); |
| ff_vc1_pred_mv(v, 0, dmv_x[1], dmv_y[1], 1, v->range_x, v->range_y, v->mb_type[0], pred_flag[1], 1); |
| return; |
| } |
| if (dir) { // backward |
| ff_vc1_pred_mv(v, n, dmv_x[1], dmv_y[1], mv1, v->range_x, v->range_y, v->mb_type[0], pred_flag[1], 1); |
| if (n == 3 || mv1) { |
| ff_vc1_pred_mv(v, 0, dmv_x[0], dmv_y[0], 1, v->range_x, v->range_y, v->mb_type[0], 0, 0); |
| } |
| } else { // forward |
| ff_vc1_pred_mv(v, n, dmv_x[0], dmv_y[0], mv1, v->range_x, v->range_y, v->mb_type[0], pred_flag[0], 0); |
| if (n == 3 || mv1) { |
| ff_vc1_pred_mv(v, 0, dmv_x[1], dmv_y[1], 1, v->range_x, v->range_y, v->mb_type[0], 0, 1); |
| } |
| } |
| } |
