repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org> | |
| 3 | * Copyright (c) 2010 Mans Rullgard <mans@mansr.com> | |
| 4 | * | |
| 5 | * This file is part of FFmpeg. | |
| 6 | * | |
| 7 | * FFmpeg is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU Lesser General Public | |
| 9 | * License as published by the Free Software Foundation; either | |
| 10 | * version 2.1 of the License, or (at your option) any later version. | |
| 11 | * | |
| 12 | * FFmpeg is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * Lesser General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public | |
| 18 | * License along with FFmpeg; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 20 | */ | |
| 21 | ||
| 22 | #include <stdint.h> | |
| 23 | ||
| 24 | #include "libavutil/attributes.h" | |
| 25 | #include "avcodec.h" | |
| 26 | #include "vp56dsp.h" | |
| 27 | #include "libavutil/common.h" | |
| 28 | ||
| 29 | /* Gives very similar result than the vp6 version except in a few cases */ | |
| 30 | static int vp5_adjust(int v, int t) | |
| 31 | { | |
| 32 | int s2, s1 = v >> 31; | |
| 33 | v ^= s1; | |
| 34 | v -= s1; | |
| 35 | v *= v < 2*t; | |
| 36 | v -= t; | |
| 37 | s2 = v >> 31; | |
| 38 | v ^= s2; | |
| 39 | v -= s2; | |
| 40 | v = t - v; | |
| 41 | v += s1; | |
| 42 | v ^= s1; | |
| 43 | return v; | |
| 44 | } | |
| 45 | ||
| 46 | static int vp6_adjust(int v, int t) | |
| 47 | { | |
| 48 | int V = v, s = v >> 31; | |
| 49 | V ^= s; | |
| 50 | V -= s; | |
| 51 | if (V-t-1 >= (unsigned)(t-1)) | |
| 52 | return v; | |
| 53 | V = 2*t - V; | |
| 54 | V += s; | |
| 55 | V ^= s; | |
| 56 | return V; | |
| 57 | } | |
| 58 | ||
| 59 | ||
| 60 | #define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc) \ | |
| 61 | static void pfx##_edge_filter_##suf(uint8_t *yuv, int stride, int t) \ | |
| 62 | { \ | |
| 63 | int pix2_inc = 2 * pix_inc; \ | |
| 64 | int i, v; \ | |
| 65 | \ | |
| 66 | for (i=0; i<12; i++) { \ | |
| 67 | v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4)>>3;\ | |
| 68 | v = pfx##_adjust(v, t); \ | |
| 69 | yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v); \ | |
| 70 | yuv[0] = av_clip_uint8(yuv[0] - v); \ | |
| 71 | yuv += line_inc; \ | |
| 72 | } \ | |
| 73 | } | |
| 74 | ||
| 75 | VP56_EDGE_FILTER(vp5, hor, 1, stride) | |
| 76 | VP56_EDGE_FILTER(vp5, ver, stride, 1) | |
| 77 | VP56_EDGE_FILTER(vp6, hor, 1, stride) | |
| 78 | VP56_EDGE_FILTER(vp6, ver, stride, 1) | |
| 79 | ||
| 80 | av_cold void ff_vp56dsp_init(VP56DSPContext *s, enum AVCodecID codec) | |
| 81 | { | |
| 82 | if (codec == AV_CODEC_ID_VP5) { | |
| 83 | s->edge_filter_hor = vp5_edge_filter_hor; | |
| 84 | s->edge_filter_ver = vp5_edge_filter_ver; | |
| 85 | } else { | |
| 86 | s->edge_filter_hor = vp6_edge_filter_hor; | |
| 87 | s->edge_filter_ver = vp6_edge_filter_ver; | |
| 88 | ||
| 89 | if (CONFIG_VP6_DECODER) { | |
| 90 | s->vp6_filter_diag4 = ff_vp6_filter_diag4_c; | |
| 91 | ||
| 92 | if (ARCH_ARM) | |
| 93 | ff_vp6dsp_init_arm(s, codec); | |
| 94 | if (ARCH_X86) | |
| 95 | ff_vp6dsp_init_x86(s, codec); | |
| 96 | } | |
| 97 | } | |
| 98 | } |