FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_weave.c
Date: 2023-09-24 13:02:57
Exec Total Coverage
Lines: 71 82 86.6%
Functions: 5 6 83.3%
Branches: 15 30 50.0%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2013 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/imgutils.h"
22 #include "libavutil/opt.h"
23 #include "libavutil/pixdesc.h"
24 #include "avfilter.h"
25 #include "formats.h"
26 #include "internal.h"
27 #include "video.h"
28
29 typedef struct WeaveContext {
30 const AVClass *class;
31 int first_field;
32 int double_weave;
33 int nb_planes;
34 int planeheight[4];
35 int linesize[4];
36
37 AVFrame *prev;
38 } WeaveContext;
39
40 #define OFFSET(x) offsetof(WeaveContext, x)
41 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
42
43 static const AVOption weave_options[] = {
44 { "first_field", "set first field", OFFSET(first_field), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "field"},
45 { "top", "set top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "field"},
46 { "t", "set top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "field"},
47 { "bottom", "set bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "field"},
48 { "b", "set bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "field"},
49 { NULL }
50 };
51
52 AVFILTER_DEFINE_CLASS_EXT(weave, "(double)weave", weave_options);
53
54 1 static int query_formats(AVFilterContext *ctx)
55 {
56 1 int reject_flags = AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_HWACCEL;
57
58 1 return ff_set_common_formats(ctx, ff_formats_pixdesc_filter(0, reject_flags));
59 }
60
61 1 static int config_props_output(AVFilterLink *outlink)
62 {
63 1 AVFilterContext *ctx = outlink->src;
64 1 WeaveContext *s = ctx->priv;
65 1 AVFilterLink *inlink = ctx->inputs[0];
66 1 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
67 int ret;
68
69
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 1 if (!s->double_weave) {
70 1 outlink->time_base.num = inlink->time_base.num * 2;
71 1 outlink->time_base.den = inlink->time_base.den;
72 1 outlink->frame_rate.num = inlink->frame_rate.num;
73 1 outlink->frame_rate.den = inlink->frame_rate.den * 2;
74 }
75 1 outlink->w = inlink->w;
76 1 outlink->h = inlink->h * 2;
77
78
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 1 if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
79 ✗ return ret;
80
81 1 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
82 1 s->planeheight[0] = s->planeheight[3] = inlink->h;
83
84 1 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
85
86 1 return 0;
87 }
88
89 typedef struct ThreadData {
90 AVFrame *in, *out;
91 } ThreadData;
92
93 225 static int weave_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
94 {
95 225 AVFilterLink *inlink = ctx->inputs[0];
96 225 WeaveContext *s = ctx->priv;
97 225 ThreadData *td = arg;
98 225 AVFrame *in = td->in;
99 225 AVFrame *out = td->out;
100
101
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 225 const int weave = (s->double_weave && !(inlink->frame_count_out & 1));
102
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 225 const int field1 = weave ? s->first_field : (!s->first_field);
103
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 225 const int field2 = weave ? (!s->first_field) : s->first_field;
104
105
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 900 for (int i = 0; i < s->nb_planes; i++) {
106 675 const int height = s->planeheight[i];
107 675 const int start = (height * jobnr) / nb_jobs;
108 675 const int end = (height * (jobnr+1)) / nb_jobs;
109
110 675 av_image_copy_plane(out->data[i] + out->linesize[i] * field1 +
111 675 out->linesize[i] * start * 2,
112 675 out->linesize[i] * 2,
113 675 in->data[i] + start * in->linesize[i],
114 in->linesize[i],
115 s->linesize[i], end - start);
116 675 av_image_copy_plane(out->data[i] + out->linesize[i] * field2 +
117 675 out->linesize[i] * start * 2,
118 675 out->linesize[i] * 2,
119 675 s->prev->data[i] + start * s->prev->linesize[i],
120 675 s->prev->linesize[i],
121 s->linesize[i], end - start);
122 }
123
124 225 return 0;
125 }
126
127 50 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
128 {
129 50 AVFilterContext *ctx = inlink->dst;
130 50 WeaveContext *s = ctx->priv;
131 50 AVFilterLink *outlink = ctx->outputs[0];
132 ThreadData td;
133 AVFrame *out;
134
135
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 50 if (!s->prev) {
136 25 s->prev = in;
137 25 return 0;
138 }
139
140 25 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
141
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 25 if (!out) {
142 ✗ av_frame_free(&in);
143 ✗ av_frame_free(&s->prev);
144 ✗ return AVERROR(ENOMEM);
145 }
146 25 av_frame_copy_props(out, in);
147
148 25 td.out = out, td.in = in;
149 25 ff_filter_execute(ctx, weave_slice, &td, NULL,
150
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 25 FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
151
152
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 25 out->pts = s->double_weave ? s->prev->pts : in->pts / 2;
153 #if FF_API_INTERLACED_FRAME
154 FF_DISABLE_DEPRECATION_WARNINGS
155 25 out->interlaced_frame = 1;
156 25 out->top_field_first = !s->first_field;
157 FF_ENABLE_DEPRECATION_WARNINGS
158 #endif
159 25 out->flags |= AV_FRAME_FLAG_INTERLACED;
160
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 25 if (s->first_field)
161 25 out->flags &= ~AV_FRAME_FLAG_TOP_FIELD_FIRST;
162 else
163 ✗ out->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
164
165
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 25 if (!s->double_weave)
166 25 av_frame_free(&in);
167 25 av_frame_free(&s->prev);
168
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 25 if (s->double_weave)
169 ✗ s->prev = in;
170 25 return ff_filter_frame(outlink, out);
171 }
172
173 2 static av_cold void uninit(AVFilterContext *ctx)
174 {
175 2 WeaveContext *s = ctx->priv;
176
177 2 av_frame_free(&s->prev);
178 2 }
179
180 static const AVFilterPad weave_inputs[] = {
181 {
182 .name = "default",
183 .type = AVMEDIA_TYPE_VIDEO,
184 .filter_frame = filter_frame,
185 },
186 };
187
188 static const AVFilterPad weave_outputs[] = {
189 {
190 .name = "default",
191 .type = AVMEDIA_TYPE_VIDEO,
192 .config_props = config_props_output,
193 },
194 };
195
196 const AVFilter ff_vf_weave = {
197 .name = "weave",
198 .description = NULL_IF_CONFIG_SMALL("Weave input video fields into frames."),
199 .priv_size = sizeof(WeaveContext),
200 .priv_class = &weave_class,
201 .uninit = uninit,
202 FILTER_INPUTS(weave_inputs),
203 FILTER_OUTPUTS(weave_outputs),
204 FILTER_QUERY_FUNC(query_formats),
205 .flags = AVFILTER_FLAG_SLICE_THREADS,
206 };
207
208 ✗ static av_cold int init(AVFilterContext *ctx)
209 {
210 ✗ WeaveContext *s = ctx->priv;
211
212 ✗ if (!strcmp(ctx->filter->name, "doubleweave"))
213 ✗ s->double_weave = 1;
214
215 ✗ return 0;
216 }
217
218 const AVFilter ff_vf_doubleweave = {
219 .name = "doubleweave",
220 .description = NULL_IF_CONFIG_SMALL("Weave input video fields into double number of frames."),
221 .priv_class = &weave_class,
222 .priv_size = sizeof(WeaveContext),
223 .init = init,
224 .uninit = uninit,
225 FILTER_INPUTS(weave_inputs),
226 FILTER_OUTPUTS(weave_outputs),
227 FILTER_QUERY_FUNC(query_formats),
228 .flags = AVFILTER_FLAG_SLICE_THREADS,
229 };
230