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FFmpeg/libavfilter/vf_swapuv.c
Ganesh Ajjanagadde 6aaac24d72 avfilter/all: propagate errors of functions from avfilter/formats
Many of the functions from avfilter/formats can return errors, usually AVERROR(ENOMEM).
This propagates the return values.

All of these were found by using av_warn_unused_result, demonstrating its utility.

Tested with FATE. I am least sure of the changes to avfilter/filtergraph,
since I don't know what/how reduce_format is intended to behave and how it should
react to errors.

Fixes: CID 1325680, 1325679, 1325678.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Previous version Reviewed-by: Nicolas George <george@nsup.org>
Previous version Reviewed-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
2015-10-14 10:04:01 -04:00

116 lines
3.1 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 "libavutil/version.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(AVBufferRef*, frame->buf[1], frame->buf[2]);
#if FF_API_ERROR_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
FFSWAP(uint64_t, frame->error[1], frame->error[2]);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
}
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 != desc->comp[2].depth))
return 0;
for (i = 0; i < desc->nb_components; i++) {
if (desc->comp[i].offset != 0 ||
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, ret;
for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
if (is_planar_yuv(desc) && (ret = ff_add_format(&formats, fmt)) < 0)
return ret;
}
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,
};