| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * VC-1 and WMV3 decoder | ||
| 3 | * Copyright (c) 2006-2007 Konstantin Shishkov | ||
| 4 | * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer | ||
| 5 | * | ||
| 6 | * This file is part of FFmpeg. | ||
| 7 | * | ||
| 8 | * FFmpeg is free software; you can redistribute it and/or | ||
| 9 | * modify it under the terms of the GNU Lesser General Public | ||
| 10 | * License as published by the Free Software Foundation; either | ||
| 11 | * version 2.1 of the License, or (at your option) any later version. | ||
| 12 | * | ||
| 13 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 16 | * Lesser General Public License for more details. | ||
| 17 | * | ||
| 18 | * You should have received a copy of the GNU Lesser General Public | ||
| 19 | * License along with FFmpeg; if not, write to the Free Software | ||
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 21 | */ | ||
| 22 | |||
| 23 | #ifndef AVCODEC_VC1_PRED_H | ||
| 24 | #define AVCODEC_VC1_PRED_H | ||
| 25 | |||
| 26 | #include "vc1.h" | ||
| 27 | #include "vc1data.h" | ||
| 28 | |||
| 29 | void ff_vc1_pred_mv(VC1Context *v, int n, int dmv_x, int dmv_y, | ||
| 30 | int mv1, int r_x, int r_y, uint8_t* is_intra, | ||
| 31 | int pred_flag, int dir); | ||
| 32 | void ff_vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y, | ||
| 33 | int mvn, int r_x, int r_y, int dir); | ||
| 34 | void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], | ||
| 35 | int direct, int mvtype); | ||
| 36 | void ff_vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dmv_y, | ||
| 37 | int mv1, int *pred_flag); | ||
| 38 | |||
| 39 | 154028 | static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs) | |
| 40 | { | ||
| 41 | 154028 | int n = bfrac; | |
| 42 | |||
| 43 | #if B_FRACTION_DEN==256 | ||
| 44 |
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154028 | if (inv) |
| 45 | 77014 | n -= 256; | |
| 46 |
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154028 | if (!qs) |
| 47 | 8104 | return 2 * ((value * n + 255) >> 9); | |
| 48 | 145924 | return (value * n + 128) >> 8; | |
| 49 | #else | ||
| 50 | if (inv) | ||
| 51 | n -= B_FRACTION_DEN; | ||
| 52 | if (!qs) | ||
| 53 | return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN)); | ||
| 54 | return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN; | ||
| 55 | #endif | ||
| 56 | } | ||
| 57 | |||
| 58 | #endif /* AVCODEC_VC1_PRED_H */ | ||
| 59 |