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/*
* Copyright (c) 2007 Bobby Bingham
*
* 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
* format and noformat video filters
*/
#include <string.h>
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct {
const AVClass *class;
char *pix_fmts;
/**
* List of flags telling if a given image format has been listed
* as argument to the filter.
*/
int listed_pix_fmt_flags[AV_PIX_FMT_NB];
} FormatContext;
#define AV_PIX_FMT_NAME_MAXSIZE 32
static av_cold int init(AVFilterContext *ctx)
{
FormatContext *s = ctx->priv;
const char *cur, *sep;
char pix_fmt_name[AV_PIX_FMT_NAME_MAXSIZE];
int pix_fmt_name_len, ret;
enum AVPixelFormat pix_fmt;
if (!s->pix_fmts)
return AVERROR(EINVAL);
/* parse the list of formats */
for (cur = s->pix_fmts; cur; cur = sep ? sep + 1 : NULL) {
if (!(sep = strchr(cur, '|')))
pix_fmt_name_len = strlen(cur);
else
pix_fmt_name_len = sep - cur;
if (pix_fmt_name_len >= AV_PIX_FMT_NAME_MAXSIZE) {
av_log(ctx, AV_LOG_ERROR, "Format name too long\n");
return -1;
}
memcpy(pix_fmt_name, cur, pix_fmt_name_len);
pix_fmt_name[pix_fmt_name_len] = 0;
if ((ret = ff_parse_pixel_format(&pix_fmt, pix_fmt_name, ctx)) < 0)
return ret;
s->listed_pix_fmt_flags[pix_fmt] = 1;
}
return 0;
}
static AVFilterFormats *make_format_list(FormatContext *s, int flag)
{
AVFilterFormats *formats = NULL;
enum AVPixelFormat pix_fmt;
for (pix_fmt = 0; pix_fmt < AV_PIX_FMT_NB; pix_fmt++)
if (s->listed_pix_fmt_flags[pix_fmt] == flag) {
int ret = ff_add_format(&formats, pix_fmt);
if (ret < 0) {
ff_formats_unref(&formats);
return NULL;
}
}
return formats;
}
#define OFFSET(x) offsetof(FormatContext, x)
static const AVOption options[] = {
{ "pix_fmts", "A '|'-separated list of pixel formats", OFFSET(pix_fmts), AV_OPT_TYPE_STRING, .flags = AV_OPT_FLAG_VIDEO_PARAM },
{ NULL }
};
#if CONFIG_FORMAT_FILTER
static int query_formats_format(AVFilterContext *ctx)
{
ff_set_common_formats(ctx, make_format_list(ctx->priv, 1));
return 0;
}
#define format_options options
AVFILTER_DEFINE_CLASS(format);
static const AVFilterPad avfilter_vf_format_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer = ff_null_get_video_buffer,
},
{ NULL }
};
static const AVFilterPad avfilter_vf_format_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO
},
{ NULL }
};
AVFilter ff_vf_format = {
.name = "format",
.description = NULL_IF_CONFIG_SMALL("Convert the input video to one of the specified pixel formats."),
.init = init,
.query_formats = query_formats_format,
.priv_size = sizeof(FormatContext),
.priv_class = &format_class,
.inputs = avfilter_vf_format_inputs,
.outputs = avfilter_vf_format_outputs,
};
#endif /* CONFIG_FORMAT_FILTER */
#if CONFIG_NOFORMAT_FILTER
static int query_formats_noformat(AVFilterContext *ctx)
{
ff_set_common_formats(ctx, make_format_list(ctx->priv, 0));
return 0;
}
#define noformat_options options
AVFILTER_DEFINE_CLASS(noformat);
static const AVFilterPad avfilter_vf_noformat_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer = ff_null_get_video_buffer,
},
{ NULL }
};
static const AVFilterPad avfilter_vf_noformat_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO
},
{ NULL }
};
AVFilter ff_vf_noformat = {
.name = "noformat",
.description = NULL_IF_CONFIG_SMALL("Force libavfilter not to use any of the specified pixel formats for the input to the next filter."),
.init = init,
.query_formats = query_formats_noformat,
.priv_size = sizeof(FormatContext),
.priv_class = &noformat_class,
.inputs = avfilter_vf_noformat_inputs,
.outputs = avfilter_vf_noformat_outputs,
};
#endif /* CONFIG_NOFORMAT_FILTER */
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