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libavfilter
vf_swapuv.c
Go to the documentation of this file.
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/*
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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 "
formats.h
"
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#include "
internal.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
(uint64_t, frame->
error
[1], frame->
error
[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_minus1
!= desc->
comp
[2].
depth_minus1
))
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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_plus1
!= 1 ||
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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
;
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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))
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ff_add_format
(&formats, fmt);
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}
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ff_set_common_formats
(ctx, formats);
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return
0;
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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_video_buffer =
get_video_buffer
,
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.filter_frame =
filter_frame
,
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},
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{ NULL }
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};
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static
const
AVFilterPad
swapuv_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_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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.query_formats =
query_formats
,
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.inputs =
swapuv_inputs
,
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.outputs =
swapuv_outputs
,
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};
Generated on Sun Sep 14 2014 18:56:11 for FFmpeg by
1.8.2