FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_hflip.c
Date: 2025-07-28 20:30:09
Exec Total Coverage
Lines: 53 56 94.6%
Functions: 4 4 100.0%
Branches: 24 28 85.7%
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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 /**
23 * @file
24 * horizontal flip filter
25 */
26
27 #include <string.h>
28
29 #include "avfilter.h"
30 #include "filters.h"
31 #include "formats.h"
32 #include "hflip.h"
33 #include "vf_hflip_init.h"
34 #include "video.h"
35 #include "libavutil/pixdesc.h"
36 #include "libavutil/internal.h"
37 #include "libavutil/intreadwrite.h"
38 #include "libavutil/imgutils.h"
39
40 196 static int query_formats(const AVFilterContext *ctx,
41 AVFilterFormatsConfig **cfg_in,
42 AVFilterFormatsConfig **cfg_out)
43 {
44 196 AVFilterFormats *pix_fmts = NULL;
45 const AVPixFmtDescriptor *desc;
46 int fmt, ret;
47
48
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 52528 for (fmt = 0; desc = av_pix_fmt_desc_get(fmt); fmt++) {
49
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 52332 if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
50
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 49196 desc->flags & AV_PIX_FMT_FLAG_BITSTREAM ||
51
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 48020 (desc->log2_chroma_w != desc->log2_chroma_h &&
52
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 55468 desc->comp[0].plane == desc->comp[1].plane)) &&
53 46060 (ret = ff_add_format(&pix_fmts, fmt)) < 0)
54 ✗ return ret;
55 }
56
57 196 return ff_set_common_formats2(ctx, cfg_in, cfg_out, pix_fmts);
58 }
59
60 195 static int config_props(AVFilterLink *inlink)
61 {
62 195 FlipContext *s = inlink->dst->priv;
63 195 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
64 195 const int hsub = pix_desc->log2_chroma_w;
65 195 const int vsub = pix_desc->log2_chroma_h;
66 int nb_planes;
67
68 195 av_image_fill_max_pixsteps(s->max_step, NULL, pix_desc);
69 195 s->planewidth[0] = s->planewidth[3] = inlink->w;
70 195 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
71 195 s->planeheight[0] = s->planeheight[3] = inlink->h;
72 195 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
73
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 195 s->bayer_plus1 = !!(pix_desc->flags & AV_PIX_FMT_FLAG_BAYER) + 1;
74
75 195 nb_planes = av_pix_fmt_count_planes(inlink->format);
76
77 195 return ff_hflip_init(s, s->max_step, nb_planes);
78 }
79
80 typedef struct ThreadData {
81 AVFrame *in, *out;
82 } ThreadData;
83
84 390 static int filter_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
85 {
86 390 FlipContext *s = ctx->priv;
87 390 ThreadData *td = arg;
88 390 AVFrame *in = td->in;
89 390 AVFrame *out = td->out;
90 uint8_t *inrow, *outrow;
91 int i, plane, step;
92
93
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 1310 for (plane = 0; plane < 4 && in->data[plane] && in->linesize[plane]; plane++) {
94 920 const int width = s->planewidth[plane] / s->bayer_plus1;
95 920 const int height = s->planeheight[plane];
96 920 const int start = (height * job ) / nb_jobs;
97 920 const int end = (height * (job+1)) / nb_jobs;
98
99 920 step = s->max_step[plane];
100
101 920 outrow = out->data[plane] + start * out->linesize[plane];
102 920 inrow = in ->data[plane] + start * in->linesize[plane] + (width - 1) * step;
103
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 248312 for (i = start; i < end; i++) {
104 247392 s->flip_line[plane](inrow, outrow, width);
105
106 247392 inrow += in ->linesize[plane];
107 247392 outrow += out->linesize[plane];
108 }
109 }
110
111 390 return 0;
112 }
113
114 390 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
115 {
116 390 AVFilterContext *ctx = inlink->dst;
117 390 AVFilterLink *outlink = ctx->outputs[0];
118 ThreadData td;
119 AVFrame *out;
120
121 390 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
122
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 390 if (!out) {
123 ✗ av_frame_free(&in);
124 ✗ return AVERROR(ENOMEM);
125 }
126 390 av_frame_copy_props(out, in);
127
128 /* copy palette if required */
129
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 390 if (av_pix_fmt_desc_get(inlink->format)->flags & AV_PIX_FMT_FLAG_PAL)
130 2 memcpy(out->data[1], in->data[1], AVPALETTE_SIZE);
131
132 390 td.in = in, td.out = out;
133 390 ff_filter_execute(ctx, filter_slice, &td, NULL,
134
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 390 FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
135
136 390 av_frame_free(&in);
137 390 return ff_filter_frame(outlink, out);
138 }
139
140 static const AVFilterPad avfilter_vf_hflip_inputs[] = {
141 {
142 .name = "default",
143 .type = AVMEDIA_TYPE_VIDEO,
144 .filter_frame = filter_frame,
145 .config_props = config_props,
146 },
147 };
148
149 const FFFilter ff_vf_hflip = {
150 .p.name = "hflip",
151 .p.description = NULL_IF_CONFIG_SMALL("Horizontally flip the input video."),
152 .p.flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
153 .priv_size = sizeof(FlipContext),
154 FILTER_INPUTS(avfilter_vf_hflip_inputs),
155 FILTER_OUTPUTS(ff_video_default_filterpad),
156 FILTER_QUERY_FUNC2(query_formats),
157 };
158