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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2006 Aurelien Jacobs |
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| 3 | * Copyright (c) 2010 Mans Rullgard |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | #include |
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| 23 | |||
| 24 | #include "libavutil/attributes.h" |
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| 25 | #include "avcodec.h" |
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| 26 | #include "vp56dsp.h" |
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| 27 | #include "libavutil/common.h" |
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| 28 | |||
| 29 | /* Gives very similar result than the vp6 version except in a few cases */ |
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| 30 | static int vp5_adjust(int v, int t) |
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| 31 | { |
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| 32 | int s2, s1 = v >> 31; |
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| 33 | v ^= s1; |
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| 34 | v -= s1; |
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| 35 | v *= v < 2*t; |
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| 36 | v -= t; |
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| 37 | s2 = v >> 31; |
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| 38 | v ^= s2; |
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| 39 | v -= s2; |
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| 40 | v = t - v; |
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| 41 | v += s1; |
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| 42 | v ^= s1; |
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| 43 | return v; |
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| 44 | } |
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| 45 | |||
| 46 | static int vp6_adjust(int v, int t) |
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| 47 | { |
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| 48 | int V = v, s = v >> 31; |
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| 49 | V ^= s; |
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| 50 | V -= s; |
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| 51 | if (V-t-1 >= (unsigned)(t-1)) |
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| 52 | return v; |
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| 53 | V = 2*t - V; |
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| 54 | V += s; |
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| 55 | V ^= s; |
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| 56 | return V; |
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| 57 | } |
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| 58 | |||
| 59 | |||
| 60 | #define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc) \ |
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| 61 | static void pfx##_edge_filter_##suf(uint8_t *yuv, int stride, int t) \ |
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| 62 | { \ |
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| 63 | int pix2_inc = 2 * pix_inc; \ |
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| 64 | int i, v; \ |
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| 65 | \ |
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| 66 | for (i=0; i<12; i++) { \ |
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| 67 | v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4)>>3;\ |
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| 68 | v = pfx##_adjust(v, t); \ |
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| 69 | yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v); \ |
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| 70 | yuv[0] = av_clip_uint8(yuv[0] - v); \ |
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| 71 | yuv += line_inc; \ |
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| 72 | } \ |
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| 73 | } |
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| 74 | |||
| 75 | VP56_EDGE_FILTER(vp5, hor, 1, stride) |
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| 76 | VP56_EDGE_FILTER(vp5, ver, stride, 1) |
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| 77 | VP56_EDGE_FILTER(vp6, hor, 1, stride) |
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| 78 | VP56_EDGE_FILTER(vp6, ver, stride, 1) |
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| 79 | |||
| 80 | av_cold void ff_vp56dsp_init(VP56DSPContext *s, enum AVCodecID codec) |
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| 81 | { |
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| 82 | if (codec == AV_CODEC_ID_VP5) { |
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| 83 | s->edge_filter_hor = vp5_edge_filter_hor; |
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| 84 | s->edge_filter_ver = vp5_edge_filter_ver; |
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| 85 | } else { |
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| 86 | s->edge_filter_hor = vp6_edge_filter_hor; |
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| 87 | s->edge_filter_ver = vp6_edge_filter_ver; |
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| 88 | |||
| 89 | if (CONFIG_VP6_DECODER) { |
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| 90 | s->vp6_filter_diag4 = ff_vp6_filter_diag4_c; |
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| 91 | |||
| 92 | if (ARCH_ARM) |
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| 93 | ff_vp6dsp_init_arm(s, codec); |
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| 94 | if (ARCH_X86) |
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| 95 | ff_vp6dsp_init_x86(s, codec); |
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| 96 | } |
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| 97 | } |
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| 98 | } |