summaryrefslogtreecommitdiffstats
path: root/libavfilter/vf_shuffleplanes.c
blob: 5d1302db048d2de1dbe8f35a127621b7d9487b93 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
/*
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "libavutil/avstring.h"
#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"

#include "avfilter.h"
#include "internal.h"
#include "video.h"

typedef struct ShufflePlanesContext {
    const AVClass *class;

    /* number of planes in the selected pixel format */
    int planes;

    /* mapping indices */
    int map[4];

    /* set to 1 if some plane is used more than once, so we need to make a copy */
    int copy;
} ShufflePlanesContext;

static av_cold int shuffleplanes_config_input(AVFilterLink *inlink)
{
    AVFilterContext    *ctx = inlink->dst;
    ShufflePlanesContext *s = ctx->priv;
    const AVPixFmtDescriptor *desc;
    int used[4] = { 0 };
    int i;

    s->copy   = 0;
    s->planes = av_pix_fmt_count_planes(inlink->format);
    desc      = av_pix_fmt_desc_get(inlink->format);

    for (i = 0; i < s->planes; i++) {
        if (s->map[i] >= s->planes) {
            av_log(ctx, AV_LOG_ERROR,
                   "Non-existing input plane #%d mapped to output plane #%d.\n",
                   s->map[i], i);
            return AVERROR(EINVAL);
        }

        if ((desc->log2_chroma_h || desc->log2_chroma_w) &&
            (i == 1 || i == 2) != (s->map[i] == 1 || s->map[i] == 2)) {
            av_log(ctx, AV_LOG_ERROR,
                   "Cannot map between a subsampled chroma plane and a luma "
                   "or alpha plane.\n");
            return AVERROR(EINVAL);
        }

        if ((desc->flags & AV_PIX_FMT_FLAG_PAL ||
             desc->flags & FF_PSEUDOPAL) &&
            (i == 1) != (s->map[i] == 1)) {
            av_log(ctx, AV_LOG_ERROR,
                   "Cannot map between a palette plane and a data plane.\n");
            return AVERROR(EINVAL);
        }
        if (used[s->map[i]])
            s->copy = 1;
        used[s->map[i]]++;
    }

    return 0;
}

static int shuffleplanes_filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
    AVFilterContext          *ctx = inlink->dst;
    ShufflePlanesContext       *s = ctx->priv;
    uint8_t *shuffled_data[4]     = { NULL };
    int      shuffled_linesize[4] = { 0 };
    int i, ret;

    for (i = 0; i < s->planes; i++) {
        shuffled_data[i]     = frame->data[s->map[i]];
        shuffled_linesize[i] = frame->linesize[s->map[i]];
    }
    memcpy(frame->data,     shuffled_data,     sizeof(shuffled_data));
    memcpy(frame->linesize, shuffled_linesize, sizeof(shuffled_linesize));

    if (s->copy) {
        AVFrame *copy = ff_get_video_buffer(ctx->outputs[0], frame->width, frame->height);

        if (!copy) {
            ret = AVERROR(ENOMEM);
            goto fail;
        }

        av_frame_copy(copy, frame);

        ret = av_frame_copy_props(copy, frame);
        if (ret < 0) {
            av_frame_free(&copy);
            goto fail;
        }

        av_frame_free(&frame);
        frame = copy;
    }

    return ff_filter_frame(ctx->outputs[0], frame);
fail:
    av_frame_free(&frame);
    return ret;
}

#define OFFSET(x) offsetof(ShufflePlanesContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption shuffleplanes_options[] = {
    { "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 },
    { "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 },
    { "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 },
    { "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 },
    { NULL },
};

AVFILTER_DEFINE_CLASS(shuffleplanes);

static const AVFilterPad shuffleplanes_inputs[] = {
    {
        .name             = "default",
        .type             = AVMEDIA_TYPE_VIDEO,
        .config_props     = shuffleplanes_config_input,
        .filter_frame     = shuffleplanes_filter_frame,
        .get_video_buffer = ff_null_get_video_buffer,
    },
    { NULL },
};

static const AVFilterPad shuffleplanes_outputs[] = {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
    },
    { NULL },
};

AVFilter ff_vf_shuffleplanes = {
    .name         = "shuffleplanes",
    .description  = NULL_IF_CONFIG_SMALL("Shuffle video planes."),
    .priv_size    = sizeof(ShufflePlanesContext),
    .priv_class   = &shuffleplanes_class,
    .inputs       = shuffleplanes_inputs,
    .outputs      = shuffleplanes_outputs,
    .flags        = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};
OpenPOWER on IntegriCloud