| /* |
| * 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 & AV_PIX_FMT_FLAG_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(©); |
| 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, |
| }; |