mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
#include "libavutil/pixdesc.h"
|
|
#include "avfilter.h"
|
|
#include "formats.h"
|
|
#include "internal.h"
|
|
#include "video.h"
|
|
|
|
static void do_swap(AVFrame *frame)
|
|
{
|
|
FFSWAP(uint8_t*, frame->data[1], frame->data[2]);
|
|
FFSWAP(int, frame->linesize[1], frame->linesize[2]);
|
|
FFSWAP(uint64_t, frame->error[1], frame->error[2]);
|
|
FFSWAP(AVBufferRef*, frame->buf[1], frame->buf[2]);
|
|
}
|
|
|
|
static AVFrame *get_video_buffer(AVFilterLink *link, int w, int h)
|
|
{
|
|
AVFrame *picref = ff_default_get_video_buffer(link, w, h);
|
|
do_swap(picref);
|
|
return picref;
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *link, AVFrame *inpicref)
|
|
{
|
|
do_swap(inpicref);
|
|
return ff_filter_frame(link->dst->outputs[0], inpicref);
|
|
}
|
|
|
|
static int is_planar_yuv(const AVPixFmtDescriptor *desc)
|
|
{
|
|
int i;
|
|
|
|
if (desc->flags & ~(AV_PIX_FMT_FLAG_BE | AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_ALPHA) ||
|
|
desc->nb_components < 3 ||
|
|
(desc->comp[1].depth_minus1 != desc->comp[2].depth_minus1))
|
|
return 0;
|
|
for (i = 0; i < desc->nb_components; i++) {
|
|
if (desc->comp[i].offset_plus1 != 1 ||
|
|
desc->comp[i].shift != 0 ||
|
|
desc->comp[i].plane != i)
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
AVFilterFormats *formats = NULL;
|
|
int fmt;
|
|
|
|
for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
|
|
if (is_planar_yuv(desc))
|
|
ff_add_format(&formats, fmt);
|
|
}
|
|
|
|
return ff_set_common_formats(ctx, formats);
|
|
}
|
|
|
|
static const AVFilterPad swapuv_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.get_video_buffer = get_video_buffer,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad swapuv_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter ff_vf_swapuv = {
|
|
.name = "swapuv",
|
|
.description = NULL_IF_CONFIG_SMALL("Swap U and V components."),
|
|
.query_formats = query_formats,
|
|
.inputs = swapuv_inputs,
|
|
.outputs = swapuv_outputs,
|
|
};
|