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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6147 | serge | 1 | /* |
| 2 | * VC-1 and WMV3 decoder |
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| 3 | * Copyright (c) 2006-2007 Konstantin Shishkov |
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| 4 | * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #ifndef AVCODEC_VC1_PRED_H |
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| 24 | #define AVCODEC_VC1_PRED_H |
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| 25 | |||
| 26 | #include "vc1.h" |
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| 27 | #include "vc1data.h" |
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| 28 | |||
| 29 | void ff_vc1_pred_mv(VC1Context *v, int n, int dmv_x, int dmv_y, |
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| 30 | int mv1, int r_x, int r_y, uint8_t* is_intra, |
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| 31 | int pred_flag, int dir); |
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| 32 | void ff_vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y, |
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| 33 | int mvn, int r_x, int r_y, uint8_t* is_intra, |
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| 34 | int dir); |
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| 35 | void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], |
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| 36 | int direct, int mvtype); |
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| 37 | void ff_vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dmv_y, |
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| 38 | int mv1, int *pred_flag); |
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| 39 | |||
| 40 | static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs) |
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| 41 | { |
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| 42 | int n = bfrac; |
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| 43 | |||
| 44 | #if B_FRACTION_DEN==256 |
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| 45 | if (inv) |
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| 46 | n -= 256; |
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| 47 | if (!qs) |
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| 48 | return 2 * ((value * n + 255) >> 9); |
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| 49 | return (value * n + 128) >> 8; |
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| 50 | #else |
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| 51 | if (inv) |
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| 52 | n -= B_FRACTION_DEN; |
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| 53 | if (!qs) |
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| 54 | return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN)); |
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| 55 | return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN; |
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| 56 | #endif |
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| 57 | } |
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| 58 | |||
| 59 | #endif /* AVCODEC_VC1_PRED_H */ |