FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_alphamerge.c
Date: 2024-11-21 09:21:34
Exec Total Coverage
Lines: 61 70 87.1%
Functions: 8 9 88.9%
Branches: 17 28 60.7%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2012 Steven Robertson
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 /**
22 * @file
23 * copy an alpha component from another video's luma
24 */
25
26 #include <string.h>
27
28 #include "libavutil/imgutils.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/pixfmt.h"
31 #include "avfilter.h"
32 #include "drawutils.h"
33 #include "formats.h"
34 #include "filters.h"
35 #include "framesync.h"
36 #include "video.h"
37
38 enum { Y, U, V, A };
39
40 typedef struct AlphaMergeContext {
41 const AVClass *class;
42
43 int is_packed_rgb;
44 uint8_t rgba_map[4];
45
46 FFFrameSync fs;
47 } AlphaMergeContext;
48
49 200 static int do_alphamerge(FFFrameSync *fs)
50 {
51 200 AVFilterContext *ctx = fs->parent;
52 200 AlphaMergeContext *s = ctx->priv;
53 AVFrame *main_buf, *alpha_buf;
54 int ret;
55
56 200 ret = ff_framesync_dualinput_get_writable(fs, &main_buf, &alpha_buf);
57
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 200 if (ret < 0)
58 ✗ return ret;
59
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 200 if (!alpha_buf)
60 ✗ return ff_filter_frame(ctx->outputs[0], main_buf);
61
62
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 200 if (alpha_buf->color_range == AVCOL_RANGE_MPEG) {
63 ✗ av_log(ctx, AV_LOG_WARNING, "alpha plane color range tagged as %s, "
64 "output will be wrong!\n",
65 ✗ av_color_range_name(alpha_buf->color_range));
66 }
67
68
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 200 if (s->is_packed_rgb) {
69 int x, y;
70 uint8_t *pin, *pout;
71
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 28900 for (y = 0; y < main_buf->height; y++) {
72 28800 pin = alpha_buf->data[0] + y * alpha_buf->linesize[0];
73 28800 pout = main_buf->data[0] + y * main_buf->linesize[0] + s->rgba_map[A];
74
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 10166400 for (x = 0; x < main_buf->width; x++) {
75 10137600 *pout = *pin;
76 10137600 pin += 1;
77 10137600 pout += 4;
78 }
79 }
80 } else {
81 100 const int main_linesize = main_buf->linesize[A];
82 100 const int alpha_linesize = alpha_buf->linesize[Y];
83 100 av_image_copy_plane(main_buf->data[A], main_linesize,
84 100 alpha_buf->data[Y], alpha_linesize,
85 100 FFMIN(main_linesize, alpha_linesize), alpha_buf->height);
86 }
87
88 200 return ff_filter_frame(ctx->outputs[0], main_buf);
89 }
90
91 8 static av_cold int init(AVFilterContext *ctx)
92 {
93 8 AlphaMergeContext *s = ctx->priv;
94
95 8 s->fs.on_event = do_alphamerge;
96 8 return 0;
97 }
98
99 4 static int query_formats(const AVFilterContext *ctx,
100 AVFilterFormatsConfig **cfg_in,
101 AVFilterFormatsConfig **cfg_out)
102 {
103 static const enum AVPixelFormat main_fmts[] = {
104 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
105 AV_PIX_FMT_GBRAP,
106 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
107 AV_PIX_FMT_NONE
108 };
109 static const enum AVPixelFormat alpha_fmts[] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };
110 int ret;
111
112 4 ret = ff_formats_ref(ff_make_format_list(alpha_fmts),
113 4 &cfg_in[1]->formats);
114
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 4 if (ret < 0)
115 ✗ return ret;
116
117 4 ret = ff_set_common_formats_from_list2(ctx, cfg_in, cfg_out, main_fmts);
118
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 4 if (ret < 0)
119 ✗ return ret;
120
121 4 return 0;
122 }
123
124 4 static int config_input_main(AVFilterLink *inlink)
125 {
126 4 AlphaMergeContext *s = inlink->dst->priv;
127 4 s->is_packed_rgb =
128
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 6 ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0 &&
129
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 2 inlink->format != AV_PIX_FMT_GBRAP;
130 4 return 0;
131 }
132
133 4 static int config_output(AVFilterLink *outlink)
134 {
135 4 FilterLink *outl = ff_filter_link(outlink);
136 4 AVFilterContext *ctx = outlink->src;
137 4 AlphaMergeContext *s = ctx->priv;
138 4 AVFilterLink *mainlink = ctx->inputs[0];
139 4 FilterLink *ml = ff_filter_link(mainlink);
140 4 AVFilterLink *alphalink = ctx->inputs[1];
141 int ret;
142
143
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 4 if (mainlink->w != alphalink->w || mainlink->h != alphalink->h) {
144 ✗ av_log(ctx, AV_LOG_ERROR,
145 "Input frame sizes do not match (%dx%d vs %dx%d).\n",
146 mainlink->w, mainlink->h,
147 alphalink->w, alphalink->h);
148 ✗ return AVERROR(EINVAL);
149 }
150
151
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 4 if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)
152 ✗ return ret;
153
154 4 outlink->w = mainlink->w;
155 4 outlink->h = mainlink->h;
156 4 outlink->time_base = mainlink->time_base;
157 4 outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio;
158 4 outl->frame_rate = ml->frame_rate;
159
160 4 return ff_framesync_configure(&s->fs);
161 }
162
163 606 static int activate(AVFilterContext *ctx)
164 {
165 606 AlphaMergeContext *s = ctx->priv;
166 606 return ff_framesync_activate(&s->fs);
167 }
168
169 8 static av_cold void uninit(AVFilterContext *ctx)
170 {
171 8 AlphaMergeContext *s = ctx->priv;
172
173 8 ff_framesync_uninit(&s->fs);
174 8 }
175
176 static const AVFilterPad alphamerge_inputs[] = {
177 {
178 .name = "main",
179 .type = AVMEDIA_TYPE_VIDEO,
180 .config_props = config_input_main,
181 },{
182 .name = "alpha",
183 .type = AVMEDIA_TYPE_VIDEO,
184 },
185 };
186
187 static const AVFilterPad alphamerge_outputs[] = {
188 {
189 .name = "default",
190 .type = AVMEDIA_TYPE_VIDEO,
191 .config_props = config_output,
192 },
193 };
194
195 static const AVOption alphamerge_options[] = {
196 { NULL }
197 };
198
199
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 16 FRAMESYNC_DEFINE_CLASS(alphamerge, AlphaMergeContext, fs);
200
201 const AVFilter ff_vf_alphamerge = {
202 .name = "alphamerge",
203 .description = NULL_IF_CONFIG_SMALL("Copy the luma value of the second "
204 "input into the alpha channel of the first input."),
205 .preinit = alphamerge_framesync_preinit,
206 .priv_size = sizeof(AlphaMergeContext),
207 .priv_class = &alphamerge_class,
208 .init = init,
209 FILTER_INPUTS(alphamerge_inputs),
210 FILTER_OUTPUTS(alphamerge_outputs),
211 FILTER_QUERY_FUNC2(query_formats),
212 .uninit = uninit,
213 .activate = activate,
214 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
215 };
216