get rid of the last svn mentions
[libav.git] / libavfilter / vf_hflip.c
CommitLineData
a1e171df
SS
1/*
2 * Copyright (c) 2007 Benoit Fouet
3 * Copyright (c) 2010 Stefano Sabatini
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/**
7fe82bd7 23 * @file
a1e171df
SS
24 * horizontal flip filter
25 */
26
27#include "avfilter.h"
28#include "libavutil/pixdesc.h"
29#include "libavutil/intreadwrite.h"
737eb597 30#include "libavutil/imgutils.h"
a1e171df
SS
31
32typedef struct {
33 int max_step[4]; ///< max pixel step for each plane, expressed as a number of bytes
34 int hsub, vsub; ///< chroma subsampling
35} FlipContext;
36
37static int query_formats(AVFilterContext *ctx)
38{
39 static const enum PixelFormat pix_fmts[] = {
40 PIX_FMT_RGB48BE, PIX_FMT_RGB48LE,
41 PIX_FMT_ARGB, PIX_FMT_RGBA,
42 PIX_FMT_ABGR, PIX_FMT_BGRA,
43 PIX_FMT_RGB24, PIX_FMT_BGR24,
44 PIX_FMT_RGB565BE, PIX_FMT_RGB565LE,
45 PIX_FMT_RGB555BE, PIX_FMT_RGB555LE,
46 PIX_FMT_BGR565BE, PIX_FMT_BGR565LE,
47 PIX_FMT_BGR555BE, PIX_FMT_BGR555LE,
48 PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE,
49 PIX_FMT_YUV420P16LE, PIX_FMT_YUV420P16BE,
50 PIX_FMT_YUV422P16LE, PIX_FMT_YUV422P16BE,
51 PIX_FMT_YUV444P16LE, PIX_FMT_YUV444P16BE,
52 PIX_FMT_YUV444P, PIX_FMT_YUV422P,
53 PIX_FMT_YUV420P, PIX_FMT_YUV411P,
54 PIX_FMT_YUV410P, PIX_FMT_YUV440P,
55 PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P,
56 PIX_FMT_YUVJ420P, PIX_FMT_YUVJ440P,
57 PIX_FMT_YUVA420P,
58 PIX_FMT_RGB8, PIX_FMT_BGR8,
59 PIX_FMT_RGB4_BYTE, PIX_FMT_BGR4_BYTE,
60 PIX_FMT_PAL8, PIX_FMT_GRAY8,
61 PIX_FMT_NONE
62 };
63
64 avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
65 return 0;
66}
67
68static int config_props(AVFilterLink *inlink)
69{
70 FlipContext *flip = inlink->dst->priv;
71 const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[inlink->format];
a1e171df 72
e16f217c 73 av_image_fill_max_pixsteps(flip->max_step, NULL, pix_desc);
a1e171df
SS
74 flip->hsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_w;
75 flip->vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
76
77 return 0;
78}
79
80static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
81{
82 FlipContext *flip = inlink->dst->priv;
83 AVFilterBufferRef *inpic = inlink->cur_buf;
84 AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf;
85 uint8_t *inrow, *outrow;
86 int i, j, plane, step, hsub, vsub;
87
88 for (plane = 0; plane < 4 && inpic->data[plane]; plane++) {
89 step = flip->max_step[plane];
90 hsub = (plane == 1 || plane == 2) ? flip->hsub : 0;
91 vsub = (plane == 1 || plane == 2) ? flip->vsub : 0;
92
93 outrow = outpic->data[plane] + (y>>vsub) * outpic->linesize[plane];
94 inrow = inpic ->data[plane] + (y>>vsub) * inpic ->linesize[plane] + ((inlink->w >> hsub) - 1) * step;
95 for (i = 0; i < h>>vsub; i++) {
96 switch (step) {
97 case 1:
98 {
99 for (j = 0; j < (inlink->w >> hsub); j++)
100 outrow[j] = inrow[-j];
101 }
102 break;
103
104 case 2:
105 {
106 uint16_t *outrow16 = (uint16_t *)outrow;
107 uint16_t * inrow16 = (uint16_t *) inrow;
108 for (j = 0; j < (inlink->w >> hsub); j++)
109 outrow16[j] = inrow16[-j];
110 }
111 break;
112
113 case 3:
114 {
115 uint8_t *in = inrow;
116 uint8_t *out = outrow;
117 for (j = 0; j < (inlink->w >> hsub); j++, out += 3, in -= 3) {
118 int32_t v = AV_RB24(in);
119 AV_WB24(out, v);
120 }
121 }
122 break;
123
124 case 4:
125 {
126 uint32_t *outrow32 = (uint32_t *)outrow;
127 uint32_t * inrow32 = (uint32_t *) inrow;
128 for (j = 0; j < (inlink->w >> hsub); j++)
129 outrow32[j] = inrow32[-j];
130 }
131 break;
132
133 default:
134 for (j = 0; j < (inlink->w >> hsub); j++)
135 memcpy(outrow + j*step, inrow - j*step, step);
136 }
137
138 inrow += inpic ->linesize[plane];
139 outrow += outpic->linesize[plane];
140 }
141 }
142
143 avfilter_draw_slice(inlink->dst->outputs[0], y, h, slice_dir);
144}
145
146AVFilter avfilter_vf_hflip = {
147 .name = "hflip",
148 .description = NULL_IF_CONFIG_SMALL("Horizontally flip the input video."),
149 .priv_size = sizeof(FlipContext),
150 .query_formats = query_formats,
151
152 .inputs = (AVFilterPad[]) {{ .name = "default",
153 .type = AVMEDIA_TYPE_VIDEO,
154 .draw_slice = draw_slice,
155 .config_props = config_props,
156 .min_perms = AV_PERM_READ, },
157 { .name = NULL}},
158 .outputs = (AVFilterPad[]) {{ .name = "default",
159 .type = AVMEDIA_TYPE_VIDEO, },
160 { .name = NULL}},
161};