FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_fieldorder.c
Date: 2024-07-16 12:46:59
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 "formats.h"
32 #include "internal.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
41 149 static int query_formats(AVFilterContext *ctx)
42 {
43 149 const AVPixFmtDescriptor *desc = NULL;
44 AVFilterFormats *formats;
45 int ret;
46
47 /** accept any input pixel format that is not hardware accelerated, not
48 * a bitstream format, and does not have vertically sub-sampled chroma */
49 149 formats = NULL;
50
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34121 while ((desc = av_pix_fmt_desc_next(desc))) {
51 33972 enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(desc);
52
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33972 if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
53
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31886 desc->flags & AV_PIX_FMT_FLAG_PAL ||
54
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31737 desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) &&
55
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56918 desc->nb_components && !desc->log2_chroma_h &&
56 25926 (ret = ff_add_format(&formats, pix_fmt)) < 0)
57 return ret;
58 }
59 149 return ff_set_common_formats(ctx, formats);
60 }
61
62 148 static int config_input(AVFilterLink *inlink)
63 {
64 148 AVFilterContext *ctx = inlink->dst;
65 148 FieldOrderContext *s = ctx->priv;
66
67 148 return av_image_fill_linesizes(s->line_size, inlink->format, inlink->w);
68 }
69
70 172 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
71 {
72 172 AVFilterContext *ctx = inlink->dst;
73 172 FieldOrderContext *s = ctx->priv;
74 172 AVFilterLink *outlink = ctx->outputs[0];
75 int h, plane, src_line_step, dst_line_step, line_size, line;
76 uint8_t *dst, *src;
77 AVFrame *out;
78
79
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172 if (!(frame->flags & AV_FRAME_FLAG_INTERLACED) ||
80
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172 !!(frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) == s->dst_tff) {
81 av_log(ctx, AV_LOG_VERBOSE,
82 "Skipping %s.\n",
83 (frame->flags & AV_FRAME_FLAG_INTERLACED) ?
84 "frame with same field order" : "progressive frame");
85 return ff_filter_frame(outlink, frame);
86 }
87
88
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172 if (av_frame_is_writable(frame)) {
89 172 out = frame;
90 } else {
91 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
92 if (!out) {
93 av_frame_free(&frame);
94 return AVERROR(ENOMEM);
95 }
96 av_frame_copy_props(out, frame);
97 }
98
99 172 av_log(ctx, AV_LOG_TRACE,
100 "picture will move %s one line\n",
101
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172 s->dst_tff ? "up" : "down");
102 172 h = frame->height;
103
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524 for (plane = 0; plane < 4 && frame->data[plane] && frame->linesize[plane]; plane++) {
104 352 dst_line_step = out->linesize[plane] * (h > 2);
105 352 src_line_step = frame->linesize[plane] * (h > 2);
106 352 line_size = s->line_size[plane];
107 352 dst = out->data[plane];
108 352 src = frame->data[plane];
109
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352 if (s->dst_tff) {
110 /** Move every line up one line, working from
111 * the top to the bottom of the frame.
112 * The original top line is lost.
113 * The new last line is created as a copy of the
114 * penultimate line from that field. */
115
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94503 for (line = 0; line < h; line++) {
116
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94176 if (1 + line < frame->height) {
117 93849 memcpy(dst, src + src_line_step, line_size);
118 } else {
119 327 memcpy(dst, src - 2 * src_line_step, line_size);
120 }
121 94176 dst += dst_line_step;
122 94176 src += src_line_step;
123 }
124 } else {
125 /** Move every line down one line, working from
126 * the bottom to the top of the frame.
127 * The original bottom line is lost.
128 * The new first line is created as a copy of the
129 * second line from that field. */
130 25 dst += (h - 1) * dst_line_step;
131 25 src += (h - 1) * src_line_step;
132
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7225 for (line = h - 1; line >= 0 ; line--) {
133
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7200 if (line > 0) {
134 7175 memcpy(dst, src - src_line_step, line_size);
135 } else {
136 25 memcpy(dst, src + 2 * src_line_step, line_size);
137 }
138 7200 dst -= dst_line_step;
139 7200 src -= src_line_step;
140 }
141 }
142 }
143 #if FF_API_INTERLACED_FRAME
144 FF_DISABLE_DEPRECATION_WARNINGS
145 172 out->top_field_first = s->dst_tff;
146 FF_ENABLE_DEPRECATION_WARNINGS
147 #endif
148
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172 if (s->dst_tff)
149 147 out->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
150 else
151 25 out->flags &= ~AV_FRAME_FLAG_TOP_FIELD_FIRST;
152
153
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172 if (frame != out)
154 av_frame_free(&frame);
155 172 return ff_filter_frame(outlink, out);
156 }
157
158 #define OFFSET(x) offsetof(FieldOrderContext, x)
159 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
160
161 static const AVOption fieldorder_options[] = {
162 { "order", "output field order", OFFSET(dst_tff), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS, .unit = "order" },
163 { "bff", "bottom field first", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, .flags=FLAGS, .unit = "order" },
164 { "tff", "top field first", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, .flags=FLAGS, .unit = "order" },
165 { NULL }
166 };
167
168 AVFILTER_DEFINE_CLASS(fieldorder);
169
170 static const AVFilterPad avfilter_vf_fieldorder_inputs[] = {
171 {
172 .name = "default",
173 .type = AVMEDIA_TYPE_VIDEO,
174 .config_props = config_input,
175 .filter_frame = filter_frame,
176 },
177 };
178
179 const AVFilter ff_vf_fieldorder = {
180 .name = "fieldorder",
181 .description = NULL_IF_CONFIG_SMALL("Set the field order."),
182 .priv_size = sizeof(FieldOrderContext),
183 .priv_class = &fieldorder_class,
184 FILTER_INPUTS(avfilter_vf_fieldorder_inputs),
185 FILTER_OUTPUTS(ff_video_default_filterpad),
186 FILTER_QUERY_FUNC(query_formats),
187 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
188 };
189