173 lines
5.4 KiB
C
173 lines
5.4 KiB
C
/*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avstring.h"
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#include "libavutil/common.h"
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#include "libavutil/internal.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/pixfmt.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "video.h"
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typedef struct ShufflePlanesContext {
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const AVClass *class;
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/* number of planes in the selected pixel format */
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int planes;
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/* mapping indices */
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uint8_t map[4];
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/* set to 1 if some plane is used more than once, so we need to make a copy */
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int copy;
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} ShufflePlanesContext;
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static av_cold int shuffleplanes_config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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ShufflePlanesContext *s = ctx->priv;
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const AVPixFmtDescriptor *desc;
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int used[4] = { 0 };
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int i;
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s->copy = 0;
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s->planes = av_pix_fmt_count_planes(inlink->format);
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desc = av_pix_fmt_desc_get(inlink->format);
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for (i = 0; i < s->planes; i++) {
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if (s->map[i] >= s->planes) {
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av_log(ctx, AV_LOG_ERROR,
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"Non-existing input plane #%d mapped to output plane #%d.\n",
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s->map[i], i);
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return AVERROR(EINVAL);
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}
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if ((desc->log2_chroma_h || desc->log2_chroma_w) &&
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(i == 1 || i == 2) != (s->map[i] == 1 || s->map[i] == 2)) {
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av_log(ctx, AV_LOG_ERROR,
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"Cannot map between a subsampled chroma plane and a luma "
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"or alpha plane.\n");
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return AVERROR(EINVAL);
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}
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if ((desc->flags & AV_PIX_FMT_FLAG_PAL ||
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desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) &&
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(i == 1) != (s->map[i] == 1)) {
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av_log(ctx, AV_LOG_ERROR,
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"Cannot map between a palette plane and a data plane.\n");
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return AVERROR(EINVAL);
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}
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if (used[s->map[i]])
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s->copy = 1;
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used[s->map[i]]++;
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}
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return 0;
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}
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static int shuffleplanes_filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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AVFilterContext *ctx = inlink->dst;
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ShufflePlanesContext *s = ctx->priv;
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uint8_t *shuffled_data[4] = { NULL };
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int shuffled_linesize[4] = { 0 };
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int i, ret;
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for (i = 0; i < s->planes; i++) {
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shuffled_data[i] = frame->data[s->map[i]];
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shuffled_linesize[i] = frame->linesize[s->map[i]];
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}
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memcpy(frame->data, shuffled_data, sizeof(shuffled_data));
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memcpy(frame->linesize, shuffled_linesize, sizeof(shuffled_linesize));
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if (s->copy) {
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AVFrame *copy = ff_get_video_buffer(ctx->outputs[0], frame->width, frame->height);
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if (!copy) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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av_frame_copy(copy, frame);
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ret = av_frame_copy_props(copy, frame);
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if (ret < 0) {
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av_frame_free(©);
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goto fail;
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}
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av_frame_free(&frame);
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frame = copy;
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}
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return ff_filter_frame(ctx->outputs[0], frame);
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fail:
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av_frame_free(&frame);
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return ret;
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}
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#define OFFSET(x) offsetof(ShufflePlanesContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption shuffleplanes_options[] = {
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{ "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 },
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{ "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 },
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{ "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 },
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{ "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 },
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{ NULL },
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};
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static const AVClass shuffleplanes_class = {
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.class_name = "shuffleplanes",
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.item_name = av_default_item_name,
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.option = shuffleplanes_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const AVFilterPad shuffleplanes_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = shuffleplanes_config_input,
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.filter_frame = shuffleplanes_filter_frame,
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.get_video_buffer = ff_null_get_video_buffer,
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},
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{ NULL },
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};
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static const AVFilterPad shuffleplanes_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL },
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};
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AVFilter ff_vf_shuffleplanes = {
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.name = "shuffleplanes",
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.description = NULL_IF_CONFIG_SMALL("Shuffle video planes"),
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.priv_size = sizeof(ShufflePlanesContext),
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.priv_class = &shuffleplanes_class,
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.inputs = shuffleplanes_inputs,
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.outputs = shuffleplanes_outputs,
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};
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