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/*
* Copyright (c) 2010 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
* aspect ratio modification video filters
*/
#include <float.h>
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
typedef struct {
const AVClass *class;
AVRational aspect;
int max;
#if FF_API_OLD_FILTER_OPTS
float aspect_num, aspect_den;
#endif
} AspectContext;
#if FF_API_OLD_FILTER_OPTS
static av_cold int init(AVFilterContext *ctx)
{
AspectContext *s = ctx->priv;
if (s->aspect_num > 0 && s->aspect_den > 0) {
av_log(ctx, AV_LOG_WARNING,
"num:den syntax is deprecated, please use num/den or named options instead\n");
s->aspect = av_d2q(s->aspect_num / s->aspect_den, s->max);
}
return 0;
}
#endif
static int filter_frame(AVFilterLink *link, AVFrame *frame)
{
AspectContext *aspect = link->dst->priv;
frame->sample_aspect_ratio = aspect->aspect;
return ff_filter_frame(link->dst->outputs[0], frame);
}
#define OFFSET(x) offsetof(AspectContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#if CONFIG_SETDAR_FILTER
static int setdar_config_props(AVFilterLink *inlink)
{
AspectContext *aspect = inlink->dst->priv;
AVRational dar = aspect->aspect;
if (aspect->aspect.num && aspect->aspect.den) {
av_reduce(&aspect->aspect.num, &aspect->aspect.den,
aspect->aspect.num * inlink->h,
aspect->aspect.den * inlink->w, 100);
inlink->sample_aspect_ratio = aspect->aspect;
} else {
inlink->sample_aspect_ratio = (AVRational){ 1, 1 };
dar = (AVRational){ inlink->w, inlink->h };
}
av_log(inlink->dst, AV_LOG_VERBOSE, "w:%d h:%d -> dar:%d/%d sar:%d/%d\n",
inlink->w, inlink->h, dar.num, dar.den,
inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den);
return 0;
}
static const AVOption setdar_options[] = {
#if FF_API_OLD_FILTER_OPTS
{ "dar_num", NULL, OFFSET(aspect_num), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, 0, FLT_MAX, FLAGS },
{ "dar_den", NULL, OFFSET(aspect_den), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, 0, FLT_MAX, FLAGS },
#endif
{ "dar", "set display aspect ratio", OFFSET(aspect), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS },
{ "ratio", "set display aspect ratio", OFFSET(aspect), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS },
{ "r", "set display aspect ratio", OFFSET(aspect), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS },
{ "max", "set max value for nominator or denominator in the ratio", OFFSET(max), AV_OPT_TYPE_INT, {.i64=100}, 1, INT_MAX, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(setdar);
static const AVFilterPad avfilter_vf_setdar_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = setdar_config_props,
.get_video_buffer = ff_null_get_video_buffer,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad avfilter_vf_setdar_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter avfilter_vf_setdar = {
.name = "setdar",
.description = NULL_IF_CONFIG_SMALL("Set the frame display aspect ratio."),
#if FF_API_OLD_FILTER_OPTS
.init = init,
#endif
.priv_size = sizeof(AspectContext),
.priv_class = &setdar_class,
.inputs = avfilter_vf_setdar_inputs,
.outputs = avfilter_vf_setdar_outputs,
};
#endif /* CONFIG_SETDAR_FILTER */
#if CONFIG_SETSAR_FILTER
static int setsar_config_props(AVFilterLink *inlink)
{
AspectContext *aspect = inlink->dst->priv;
inlink->sample_aspect_ratio = aspect->aspect;
return 0;
}
static const AVOption setsar_options[] = {
#if FF_API_OLD_FILTER_OPTS
{ "sar_num", NULL, OFFSET(aspect_num), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, 0, FLT_MAX, FLAGS },
{ "sar_den", NULL, OFFSET(aspect_den), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, 0, FLT_MAX, FLAGS },
#endif
{ "sar", "set sample (pixel) aspect ratio", OFFSET(aspect), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS },
{ "ratio", "set sample (pixel) aspect ratio", OFFSET(aspect), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS },
{ "r", "set sample (pixel) aspect ratio", OFFSET(aspect), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS },
{ "max", "set max value for nominator or denominator in the ratio", OFFSET(max), AV_OPT_TYPE_INT, {.i64=100}, 1, INT_MAX, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(setsar);
static const AVFilterPad avfilter_vf_setsar_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = setsar_config_props,
.get_video_buffer = ff_null_get_video_buffer,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad avfilter_vf_setsar_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter avfilter_vf_setsar = {
.name = "setsar",
.description = NULL_IF_CONFIG_SMALL("Set the pixel sample aspect ratio."),
#if FF_API_OLD_FILTER_OPTS
.init = init,
#endif
.priv_size = sizeof(AspectContext),
.priv_class = &setsar_class,
.inputs = avfilter_vf_setsar_inputs,
.outputs = avfilter_vf_setsar_outputs,
};
#endif /* CONFIG_SETSAR_FILTER */
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