| 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 | }; |