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1 | /* |
2 | * This file is part of FFmpeg. | |
3 | * | |
4 | * FFmpeg is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU Lesser General Public | |
6 | * License as published by the Free Software Foundation; either | |
7 | * version 2.1 of the License, or (at your option) any later version. | |
8 | * | |
9 | * FFmpeg is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * Lesser General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU Lesser General Public | |
15 | * License along with FFmpeg; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | ||
19 | #include "libavutil/avstring.h" | |
20 | #include "libavutil/common.h" | |
21 | #include "libavutil/internal.h" | |
22 | #include "libavutil/opt.h" | |
23 | #include "libavutil/pixdesc.h" | |
24 | #include "libavutil/pixfmt.h" | |
25 | ||
26 | #include "avfilter.h" | |
27 | #include "internal.h" | |
28 | #include "video.h" | |
29 | ||
30 | typedef struct ShufflePlanesContext { | |
31 | const AVClass *class; | |
32 | ||
33 | /* number of planes in the selected pixel format */ | |
34 | int planes; | |
35 | ||
36 | /* mapping indices */ | |
37 | int map[4]; | |
38 | ||
39 | /* set to 1 if some plane is used more than once, so we need to make a copy */ | |
40 | int copy; | |
41 | } ShufflePlanesContext; | |
42 | ||
43 | static av_cold int shuffleplanes_config_input(AVFilterLink *inlink) | |
44 | { | |
45 | AVFilterContext *ctx = inlink->dst; | |
46 | ShufflePlanesContext *s = ctx->priv; | |
47 | const AVPixFmtDescriptor *desc; | |
48 | int used[4] = { 0 }; | |
49 | int i; | |
50 | ||
51 | s->copy = 0; | |
52 | s->planes = av_pix_fmt_count_planes(inlink->format); | |
53 | desc = av_pix_fmt_desc_get(inlink->format); | |
54 | ||
55 | for (i = 0; i < s->planes; i++) { | |
56 | if (s->map[i] >= s->planes) { | |
57 | av_log(ctx, AV_LOG_ERROR, | |
58 | "Non-existing input plane #%d mapped to output plane #%d.\n", | |
59 | s->map[i], i); | |
60 | return AVERROR(EINVAL); | |
61 | } | |
62 | ||
63 | if ((desc->log2_chroma_h || desc->log2_chroma_w) && | |
64 | (i == 1 || i == 2) != (s->map[i] == 1 || s->map[i] == 2)) { | |
65 | av_log(ctx, AV_LOG_ERROR, | |
66 | "Cannot map between a subsampled chroma plane and a luma " | |
67 | "or alpha plane.\n"); | |
68 | return AVERROR(EINVAL); | |
69 | } | |
70 | ||
71 | if ((desc->flags & AV_PIX_FMT_FLAG_PAL || | |
72 | desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) && | |
73 | (i == 1) != (s->map[i] == 1)) { | |
74 | av_log(ctx, AV_LOG_ERROR, | |
75 | "Cannot map between a palette plane and a data plane.\n"); | |
76 | return AVERROR(EINVAL); | |
77 | } | |
78 | if (used[s->map[i]]) | |
79 | s->copy = 1; | |
80 | used[s->map[i]]++; | |
81 | } | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
86 | static int shuffleplanes_filter_frame(AVFilterLink *inlink, AVFrame *frame) | |
87 | { | |
88 | AVFilterContext *ctx = inlink->dst; | |
89 | ShufflePlanesContext *s = ctx->priv; | |
90 | uint8_t *shuffled_data[4] = { NULL }; | |
91 | int shuffled_linesize[4] = { 0 }; | |
92 | int i, ret; | |
93 | ||
94 | for (i = 0; i < s->planes; i++) { | |
95 | shuffled_data[i] = frame->data[s->map[i]]; | |
96 | shuffled_linesize[i] = frame->linesize[s->map[i]]; | |
97 | } | |
98 | memcpy(frame->data, shuffled_data, sizeof(shuffled_data)); | |
99 | memcpy(frame->linesize, shuffled_linesize, sizeof(shuffled_linesize)); | |
100 | ||
101 | if (s->copy) { | |
102 | AVFrame *copy = ff_get_video_buffer(ctx->outputs[0], frame->width, frame->height); | |
103 | ||
104 | if (!copy) { | |
105 | ret = AVERROR(ENOMEM); | |
106 | goto fail; | |
107 | } | |
108 | ||
109 | av_frame_copy(copy, frame); | |
110 | ||
111 | ret = av_frame_copy_props(copy, frame); | |
112 | if (ret < 0) { | |
113 | av_frame_free(©); | |
114 | goto fail; | |
115 | } | |
116 | ||
117 | av_frame_free(&frame); | |
118 | frame = copy; | |
119 | } | |
120 | ||
121 | return ff_filter_frame(ctx->outputs[0], frame); | |
122 | fail: | |
123 | av_frame_free(&frame); | |
124 | return ret; | |
125 | } | |
126 | ||
127 | #define OFFSET(x) offsetof(ShufflePlanesContext, x) | |
128 | #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM) | |
129 | static const AVOption shuffleplanes_options[] = { | |
130 | { "map0", "Index of the input plane to be used as the first output plane ", OFFSET(map[0]), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 4, FLAGS }, | |
131 | { "map1", "Index of the input plane to be used as the second output plane ", OFFSET(map[1]), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 4, FLAGS }, | |
132 | { "map2", "Index of the input plane to be used as the third output plane ", OFFSET(map[2]), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, 4, FLAGS }, | |
133 | { "map3", "Index of the input plane to be used as the fourth output plane ", OFFSET(map[3]), AV_OPT_TYPE_INT, { .i64 = 3 }, 0, 4, FLAGS }, | |
134 | { NULL }, | |
135 | }; | |
136 | ||
137 | static const AVClass shuffleplanes_class = { | |
138 | .class_name = "shuffleplanes", | |
139 | .item_name = av_default_item_name, | |
140 | .option = shuffleplanes_options, | |
141 | .version = LIBAVUTIL_VERSION_INT, | |
142 | }; | |
143 | ||
144 | static const AVFilterPad shuffleplanes_inputs[] = { | |
145 | { | |
146 | .name = "default", | |
147 | .type = AVMEDIA_TYPE_VIDEO, | |
148 | .config_props = shuffleplanes_config_input, | |
149 | .filter_frame = shuffleplanes_filter_frame, | |
150 | .get_video_buffer = ff_null_get_video_buffer, | |
151 | }, | |
152 | { NULL }, | |
153 | }; | |
154 | ||
155 | static const AVFilterPad shuffleplanes_outputs[] = { | |
156 | { | |
157 | .name = "default", | |
158 | .type = AVMEDIA_TYPE_VIDEO, | |
159 | }, | |
160 | { NULL }, | |
161 | }; | |
162 | ||
163 | AVFilter ff_vf_shuffleplanes = { | |
164 | .name = "shuffleplanes", | |
165 | .description = NULL_IF_CONFIG_SMALL("Shuffle video planes"), | |
166 | ||
167 | .priv_size = sizeof(ShufflePlanesContext), | |
168 | .priv_class = &shuffleplanes_class, | |
169 | ||
170 | .inputs = shuffleplanes_inputs, | |
171 | .outputs = shuffleplanes_outputs, | |
172 | }; |