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59 lines
2.0 KiB
59 lines
2.0 KiB
/* |
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* VC-1 and WMV3 decoder |
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* Copyright (c) 2006-2007 Konstantin Shishkov |
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* Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_VC1_PRED_H |
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#define AVCODEC_VC1_PRED_H |
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#include "vc1.h" |
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#include "vc1data.h" |
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void ff_vc1_pred_mv(VC1Context *v, int n, int dmv_x, int dmv_y, |
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int mv1, int r_x, int r_y, uint8_t* is_intra, |
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int pred_flag, int dir); |
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void ff_vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y, |
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int mvn, int r_x, int r_y, uint8_t* is_intra, |
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int dir); |
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void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], |
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int direct, int mvtype); |
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void ff_vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dmv_y, |
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int mv1, int *pred_flag); |
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static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs) |
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{ |
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int n = bfrac; |
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#if B_FRACTION_DEN==256 |
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if (inv) |
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n -= 256; |
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if (!qs) |
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return 2 * ((value * n + 255) >> 9); |
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return (value * n + 128) >> 8; |
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#else |
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if (inv) |
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n -= B_FRACTION_DEN; |
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if (!qs) |
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return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN)); |
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return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN; |
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#endif |
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} |
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#endif /* AVCODEC_VC1_PRED_H */
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