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/*
* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
*
* 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
*/
/**
* @file
* swap UV filter
*/
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/version.h" |
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#include "avfilter.h" |
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#include "formats.h" |
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#include "internal.h" |
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#include "video.h" |
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|
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typedef struct SwapUVContext {
const AVClass *class;
} SwapUVContext;
static const AVOption swapuv_options[] = {
{ NULL }
};
AVFILTER_DEFINE_CLASS(swapuv);
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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]);
FFSWAP(int, frame->linesize[1], frame->linesize[2]);
FFSWAP(AVBufferRef*, frame->buf[1], frame->buf[2]); |
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#if FF_API_ERROR_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
FFSWAP(uint64_t, frame->error[1], frame->error[2]);
FF_ENABLE_DEPRECATION_WARNINGS
#endif |
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} |
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|
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static AVFrame *get_video_buffer(AVFilterLink *link, int w, int h)
{
AVFrame *picref = ff_default_get_video_buffer(link, w, h);
do_swap(picref); |
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return picref;
}
|
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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)
{
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;
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 ||
desc->comp[i].plane != i)
return 0;
}
return 1;
}
|
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static int query_formats(AVFilterContext *ctx)
{ |
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AVFilterFormats *formats = NULL; |
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int fmt, ret; |
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|
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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)
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[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer = get_video_buffer, |
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.filter_frame = filter_frame, |
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},
{ NULL }
};
static const AVFilterPad swapuv_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
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AVFilter ff_vf_swapuv = { |
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.name = "swapuv",
.description = NULL_IF_CONFIG_SMALL("Swap U and V components."), |
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.query_formats = query_formats, |
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.priv_size = sizeof(SwapUVContext),
.priv_class = &swapuv_class, |
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.inputs = swapuv_inputs,
.outputs = swapuv_outputs, |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
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}; |