repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| f6fa7814 DM |
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, uint8_t* is_intra, | |
| 34 | int dir); | |
| 35 | void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], | |
| 36 | int direct, int mvtype); | |
| 37 | void ff_vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dmv_y, | |
| 38 | int mv1, int *pred_flag); | |
| 39 | ||
| 40 | static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs) | |
| 41 | { | |
| 42 | int n = bfrac; | |
| 43 | ||
| 44 | #if B_FRACTION_DEN==256 | |
| 45 | if (inv) | |
| 46 | n -= 256; | |
| 47 | if (!qs) | |
| 48 | return 2 * ((value * n + 255) >> 9); | |
| 49 | return (value * n + 128) >> 8; | |
| 50 | #else | |
| 51 | if (inv) | |
| 52 | n -= B_FRACTION_DEN; | |
| 53 | if (!qs) | |
| 54 | return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN)); | |
| 55 | return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN; | |
| 56 | #endif | |
| 57 | } | |
| 58 | ||
| 59 | #endif /* AVCODEC_VC1_PRED_H */ |