FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_despill.c
Date: 2024-04-19 17:50:32
Exec Total Coverage
Lines: 0 44 0.0%
Functions: 0 3 0.0%
Branches: 0 24 0.0%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2017 Paul B Mahol
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "libavutil/opt.h"
22 #include "libavutil/pixdesc.h"
23 #include "avfilter.h"
24 #include "internal.h"
25
26 typedef struct DespillContext {
27 const AVClass *class;
28
29 int co[4]; /* color offsets rgba */
30
31 int alpha;
32 int type;
33 float spillmix;
34 float spillexpand;
35 float redscale;
36 float greenscale;
37 float bluescale;
38 float brightness;
39 } DespillContext;
40
41 static int do_despill_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
42 {
43 DespillContext *s = ctx->priv;
44 AVFrame *frame = arg;
45 const int ro = s->co[0], go = s->co[1], bo = s->co[2], ao = s->co[3];
46 const int slice_start = (frame->height * jobnr) / nb_jobs;
47 const int slice_end = (frame->height * (jobnr + 1)) / nb_jobs;
48 const float brightness = s->brightness;
49 const float redscale = s->redscale;
50 const float greenscale = s->greenscale;
51 const float bluescale = s->bluescale;
52 const float spillmix = s->spillmix;
53 const float factor = (1.f - spillmix) * (1.f - s->spillexpand);
54 float red, green, blue;
55 int x, y;
56
57 for (y = slice_start; y < slice_end; y++) {
58 uint8_t *dst = frame->data[0] + y * frame->linesize[0];
59
60 for (x = 0; x < frame->width; x++) {
61 float spillmap;
62
63 red = dst[x * 4 + ro] / 255.f;
64 green = dst[x * 4 + go] / 255.f;
65 blue = dst[x * 4 + bo] / 255.f;
66
67 if (s->type) {
68 spillmap = FFMAX(blue - (red * spillmix + green * factor), 0.f);
69 } else {
70 spillmap = FFMAX(green - (red * spillmix + blue * factor), 0.f);
71 }
72
73 red = FFMAX(red + spillmap * redscale + brightness * spillmap, 0.f);
74 green = FFMAX(green + spillmap * greenscale + brightness * spillmap, 0.f);
75 blue = FFMAX(blue + spillmap * bluescale + brightness * spillmap, 0.f);
76
77 dst[x * 4 + ro] = av_clip_uint8(red * 255);
78 dst[x * 4 + go] = av_clip_uint8(green * 255);
79 dst[x * 4 + bo] = av_clip_uint8(blue * 255);
80 if (s->alpha) {
81 spillmap = 1.f - spillmap;
82 dst[x * 4 + ao] = av_clip_uint8(spillmap * 255);
83 }
84 }
85 }
86
87 return 0;
88 }
89
90 static int filter_frame(AVFilterLink *link, AVFrame *frame)
91 {
92 AVFilterContext *ctx = link->dst;
93 int ret;
94
95 if (ret = ff_filter_execute(ctx, do_despill_slice, frame, NULL,
96 FFMIN(frame->height, ff_filter_get_nb_threads(ctx))))
97 return ret;
98
99 return ff_filter_frame(ctx->outputs[0], frame);
100 }
101
102 static av_cold int config_output(AVFilterLink *outlink)
103 {
104 AVFilterContext *ctx = outlink->src;
105 DespillContext *s = ctx->priv;
106 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
107 int i;
108
109 for (i = 0; i < 4; ++i)
110 s->co[i] = desc->comp[i].offset;
111
112 return 0;
113 }
114
115 static const enum AVPixelFormat pixel_fmts[] = {
116 AV_PIX_FMT_ARGB,
117 AV_PIX_FMT_RGBA,
118 AV_PIX_FMT_ABGR,
119 AV_PIX_FMT_BGRA,
120 AV_PIX_FMT_NONE
121 };
122
123 static const AVFilterPad despill_inputs[] = {
124 {
125 .name = "default",
126 .type = AVMEDIA_TYPE_VIDEO,
127 .flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
128 .filter_frame = filter_frame,
129 },
130 };
131
132 static const AVFilterPad despill_outputs[] = {
133 {
134 .name = "default",
135 .type = AVMEDIA_TYPE_VIDEO,
136 .config_props = config_output,
137 },
138 };
139
140 #define OFFSET(x) offsetof(DespillContext, x)
141 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
142
143 static const AVOption despill_options[] = {
144 { "type", "set the screen type", OFFSET(type), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, .unit = "type" },
145 { "green", "greenscreen", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "type" },
146 { "blue", "bluescreen", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "type" },
147 { "mix", "set the spillmap mix", OFFSET(spillmix), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS },
148 { "expand", "set the spillmap expand", OFFSET(spillexpand), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, FLAGS },
149 { "red", "set red scale", OFFSET(redscale), AV_OPT_TYPE_FLOAT, {.dbl=0}, -100, 100, FLAGS },
150 { "green", "set green scale", OFFSET(greenscale), AV_OPT_TYPE_FLOAT, {.dbl=-1}, -100, 100, FLAGS },
151 { "blue", "set blue scale", OFFSET(bluescale), AV_OPT_TYPE_FLOAT, {.dbl=0}, -100, 100, FLAGS },
152 { "brightness", "set brightness", OFFSET(brightness), AV_OPT_TYPE_FLOAT, {.dbl=0}, -10, 10, FLAGS },
153 { "alpha", "change alpha component", OFFSET(alpha), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
154 { NULL }
155 };
156
157 AVFILTER_DEFINE_CLASS(despill);
158
159 const AVFilter ff_vf_despill = {
160 .name = "despill",
161 .description = NULL_IF_CONFIG_SMALL("Despill video."),
162 .priv_size = sizeof(DespillContext),
163 .priv_class = &despill_class,
164 FILTER_INPUTS(despill_inputs),
165 FILTER_OUTPUTS(despill_outputs),
166 FILTER_PIXFMTS_ARRAY(pixel_fmts),
167 .process_command = ff_filter_process_command,
168 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
169 };
170