blob: 4bc7b79f8743cd49e52f5589f156eb9ef548645c
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 | AVFILTER_DEFINE_CLASS(shuffleplanes); |
138 | |
139 | static const AVFilterPad shuffleplanes_inputs[] = { |
140 | { |
141 | .name = "default", |
142 | .type = AVMEDIA_TYPE_VIDEO, |
143 | .config_props = shuffleplanes_config_input, |
144 | .filter_frame = shuffleplanes_filter_frame, |
145 | .get_video_buffer = ff_null_get_video_buffer, |
146 | }, |
147 | { NULL }, |
148 | }; |
149 | |
150 | static const AVFilterPad shuffleplanes_outputs[] = { |
151 | { |
152 | .name = "default", |
153 | .type = AVMEDIA_TYPE_VIDEO, |
154 | }, |
155 | { NULL }, |
156 | }; |
157 | |
158 | AVFilter ff_vf_shuffleplanes = { |
159 | .name = "shuffleplanes", |
160 | .description = NULL_IF_CONFIG_SMALL("Shuffle video planes."), |
161 | |
162 | .priv_size = sizeof(ShufflePlanesContext), |
163 | .priv_class = &shuffleplanes_class, |
164 | |
165 | .inputs = shuffleplanes_inputs, |
166 | .outputs = shuffleplanes_outputs, |
167 | }; |
168 |