FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_fieldorder.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 53 63 84.1%
Functions: 3 3 100.0%
Branches: 35 46 76.1%
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1 /*
2 * Copyright (c) 2011 Mark Himsley
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 * video field order filter, heavily influenced by vf_pad.c
24 */
25
26 #include "libavutil/imgutils.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/pixdesc.h"
30 #include "avfilter.h"
31 #include "filters.h"
32 #include "formats.h"
33 #include "video.h"
34
35 typedef struct FieldOrderContext {
36 const AVClass *class;
37 int dst_tff; ///< output bff/tff
38 int line_size[4]; ///< bytes of pixel data per line for each plane
39 } FieldOrderContext;
40
41 158 static int query_formats(const AVFilterContext *ctx,
42 AVFilterFormatsConfig **cfg_in,
43 AVFilterFormatsConfig **cfg_out)
44 {
45 158 const AVPixFmtDescriptor *desc = NULL;
46 AVFilterFormats *formats;
47 int ret;
48
49 /** accept any input pixel format that is not hardware accelerated, not
50 * a bitstream format, and does not have vertically sub-sampled chroma */
51 158 formats = NULL;
52
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 38552 while ((desc = av_pix_fmt_desc_next(desc))) {
53 38394 enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(desc);
54
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 38394 if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
55
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 36182 desc->flags & AV_PIX_FMT_FLAG_PAL ||
56
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 36024 desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) &&
57
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 64780 desc->nb_components && !desc->log2_chroma_h &&
58 29704 (ret = ff_add_format(&formats, pix_fmt)) < 0)
59 ✗ return ret;
60 }
61 158 return ff_set_common_formats2(ctx, cfg_in, cfg_out, formats);
62 }
63
64 157 static int config_input(AVFilterLink *inlink)
65 {
66 157 AVFilterContext *ctx = inlink->dst;
67 157 FieldOrderContext *s = ctx->priv;
68
69 157 return av_image_fill_linesizes(s->line_size, inlink->format, inlink->w);
70 }
71
72 181 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
73 {
74 181 AVFilterContext *ctx = inlink->dst;
75 181 FieldOrderContext *s = ctx->priv;
76 181 AVFilterLink *outlink = ctx->outputs[0];
77 int h, plane, src_line_step, dst_line_step, line_size, line;
78 uint8_t *dst, *src;
79 AVFrame *out;
80
81
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 181 if (!(frame->flags & AV_FRAME_FLAG_INTERLACED) ||
82
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 181 !!(frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) == s->dst_tff) {
83 ✗ av_log(ctx, AV_LOG_VERBOSE,
84 "Skipping %s.\n",
85 ✗ (frame->flags & AV_FRAME_FLAG_INTERLACED) ?
86 "frame with same field order" : "progressive frame");
87 ✗ return ff_filter_frame(outlink, frame);
88 }
89
90
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 181 if (av_frame_is_writable(frame)) {
91 181 out = frame;
92 } else {
93 ✗ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
94 ✗ if (!out) {
95 ✗ av_frame_free(&frame);
96 ✗ return AVERROR(ENOMEM);
97 }
98 ✗ av_frame_copy_props(out, frame);
99 }
100
101 181 av_log(ctx, AV_LOG_TRACE,
102 "picture will move %s one line\n",
103
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 181 s->dst_tff ? "up" : "down");
104 181 h = frame->height;
105
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 542 for (plane = 0; plane < 4 && frame->data[plane] && frame->linesize[plane]; plane++) {
106 361 dst_line_step = out->linesize[plane] * (h > 2);
107 361 src_line_step = frame->linesize[plane] * (h > 2);
108 361 line_size = s->line_size[plane];
109 361 dst = out->data[plane];
110 361 src = frame->data[plane];
111
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 361 if (s->dst_tff) {
112 /** Move every line up one line, working from
113 * the top to the bottom of the frame.
114 * The original top line is lost.
115 * The new last line is created as a copy of the
116 * penultimate line from that field. */
117
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 97104 for (line = 0; line < h; line++) {
118
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 96768 if (1 + line < frame->height) {
119 96432 memcpy(dst, src + src_line_step, line_size);
120 } else {
121 336 memcpy(dst, src - 2 * src_line_step, line_size);
122 }
123 96768 dst += dst_line_step;
124 96768 src += src_line_step;
125 }
126 } else {
127 /** Move every line down one line, working from
128 * the bottom to the top of the frame.
129 * The original bottom line is lost.
130 * The new first line is created as a copy of the
131 * second line from that field. */
132 25 dst += (h - 1) * dst_line_step;
133 25 src += (h - 1) * src_line_step;
134
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 7225 for (line = h - 1; line >= 0 ; line--) {
135
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 7200 if (line > 0) {
136 7175 memcpy(dst, src - src_line_step, line_size);
137 } else {
138 25 memcpy(dst, src + 2 * src_line_step, line_size);
139 }
140 7200 dst -= dst_line_step;
141 7200 src -= src_line_step;
142 }
143 }
144 }
145 #if FF_API_INTERLACED_FRAME
146 FF_DISABLE_DEPRECATION_WARNINGS
147 181 out->top_field_first = s->dst_tff;
148 FF_ENABLE_DEPRECATION_WARNINGS
149 #endif
150
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 181 if (s->dst_tff)
151 156 out->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
152 else
153 25 out->flags &= ~AV_FRAME_FLAG_TOP_FIELD_FIRST;
154
155
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 181 if (frame != out)
156 ✗ av_frame_free(&frame);
157 181 return ff_filter_frame(outlink, out);
158 }
159
160 #define OFFSET(x) offsetof(FieldOrderContext, x)
161 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
162
163 static const AVOption fieldorder_options[] = {
164 { "order", "output field order", OFFSET(dst_tff), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS, .unit = "order" },
165 { "bff", "bottom field first", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, .flags=FLAGS, .unit = "order" },
166 { "tff", "top field first", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, .flags=FLAGS, .unit = "order" },
167 { NULL }
168 };
169
170 AVFILTER_DEFINE_CLASS(fieldorder);
171
172 static const AVFilterPad avfilter_vf_fieldorder_inputs[] = {
173 {
174 .name = "default",
175 .type = AVMEDIA_TYPE_VIDEO,
176 .config_props = config_input,
177 .filter_frame = filter_frame,
178 },
179 };
180
181 const AVFilter ff_vf_fieldorder = {
182 .name = "fieldorder",
183 .description = NULL_IF_CONFIG_SMALL("Set the field order."),
184 .priv_size = sizeof(FieldOrderContext),
185 .priv_class = &fieldorder_class,
186 FILTER_INPUTS(avfilter_vf_fieldorder_inputs),
187 FILTER_OUTPUTS(ff_video_default_filterpad),
188 FILTER_QUERY_FUNC2(query_formats),
189 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
190 };
191