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100 lines
2.9 KiB
100 lines
2.9 KiB
/* |
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* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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/** |
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* @file |
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* swap UV filter |
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*/ |
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#include "libavutil/pixdesc.h" |
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#include "avfilter.h" |
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#include "filters.h" |
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#include "formats.h" |
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#include "video.h" |
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static void do_swap(AVFrame *frame) |
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{ |
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FFSWAP(uint8_t*, frame->data[1], frame->data[2]); |
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FFSWAP(int, frame->linesize[1], frame->linesize[2]); |
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FFSWAP(AVBufferRef*, frame->buf[1], frame->buf[2]); |
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} |
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static AVFrame *get_video_buffer(AVFilterLink *link, int w, int h) |
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{ |
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AVFrame *picref = ff_default_get_video_buffer(link, w, h); |
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do_swap(picref); |
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return picref; |
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} |
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static int filter_frame(AVFilterLink *link, AVFrame *inpicref) |
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{ |
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do_swap(inpicref); |
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return ff_filter_frame(link->dst->outputs[0], inpicref); |
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} |
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static int is_planar_yuv(const AVPixFmtDescriptor *desc) |
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{ |
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int i; |
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if (desc->flags & ~(AV_PIX_FMT_FLAG_BE | AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_ALPHA) || |
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desc->nb_components < 3 || |
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(desc->comp[1].depth != desc->comp[2].depth)) |
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return 0; |
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for (i = 0; i < desc->nb_components; i++) { |
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if (desc->comp[i].offset != 0 || |
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desc->comp[i].shift != 0 || |
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desc->comp[i].plane != i) |
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return 0; |
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} |
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return 1; |
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} |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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AVFilterFormats *formats = NULL; |
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int fmt, ret; |
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for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) { |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt); |
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if (is_planar_yuv(desc) && (ret = ff_add_format(&formats, fmt)) < 0) |
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return ret; |
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} |
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return ff_set_common_formats(ctx, formats); |
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} |
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static const AVFilterPad swapuv_inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.get_buffer.video = get_video_buffer, |
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.filter_frame = filter_frame, |
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}, |
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}; |
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const AVFilter ff_vf_swapuv = { |
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.name = "swapuv", |
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.description = NULL_IF_CONFIG_SMALL("Swap U and V components."), |
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FILTER_INPUTS(swapuv_inputs), |
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FILTER_OUTPUTS(ff_video_default_filterpad), |
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FILTER_QUERY_FUNC(query_formats), |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
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};
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