mirror of https://github.com/FFmpeg/FFmpeg.git
Anton Khirnov
11 years ago
parent
bba2a7cc5f
commit
599b81ca9a
6 changed files with 206 additions and 1 deletions
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/*
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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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