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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
#include "common/msg.h"
#include "options/options.h"
#include "video/img_format.h"
#include "video/mp_image.h"
#include "vf.h"
#include "options/m_option.h"
static const struct vf_priv_s {
int crop_w,crop_h;
int crop_x,crop_y;
} vf_priv_dflt = {
-1,-1,
-1,-1
};
//===========================================================================//
static int reconfig(struct vf_instance *vf, struct mp_image_params *in,
struct mp_image_params *out)
{
int width = in->w, height = in->h, d_width = in->d_w, d_height = in->d_h;
// calculate the missing parameters:
if(vf->priv->crop_w<=0 || vf->priv->crop_w>width) vf->priv->crop_w=width;
if(vf->priv->crop_h<=0 || vf->priv->crop_h>height) vf->priv->crop_h=height;
if(vf->priv->crop_x<0) vf->priv->crop_x=(width-vf->priv->crop_w)/2;
if(vf->priv->crop_y<0) vf->priv->crop_y=(height-vf->priv->crop_h)/2;
// rounding:
struct mp_imgfmt_desc fmt = mp_imgfmt_get_desc(in->imgfmt);
vf->priv->crop_x = MP_ALIGN_DOWN(vf->priv->crop_x, fmt.align_x);
vf->priv->crop_y = MP_ALIGN_DOWN(vf->priv->crop_y, fmt.align_y);
// check:
if(vf->priv->crop_w+vf->priv->crop_x>width ||
vf->priv->crop_h+vf->priv->crop_y>height){
MP_WARN(vf, "Bad position/width/height - cropped area outside of the original!\n");
return -1;
}
vf_rescale_dsize(&d_width, &d_height, width, height,
vf->priv->crop_w, vf->priv->crop_h);
*out = *in;
out->w = vf->priv->crop_w;
out->h = vf->priv->crop_h;
out->d_w = d_width;
out->d_h = d_height;
return 0;
}
static struct mp_image *filter(struct vf_instance *vf, struct mp_image *mpi)
{
mp_image_crop(mpi, vf->priv->crop_x, vf->priv->crop_y,
vf->priv->crop_x + vf->priv->crop_w,
vf->priv->crop_y + vf->priv->crop_h);
return mpi;
}
static int query_format(struct vf_instance *vf, unsigned int fmt)
{
if (!IMGFMT_IS_HWACCEL(fmt))
return vf_next_query_format(vf, fmt);
return 0;
}
static int vf_open(vf_instance_t *vf){
vf->reconfig=reconfig;
vf->filter=filter;
vf->query_format=query_format;
return 1;
}
#define OPT_BASE_STRUCT struct vf_priv_s
static const m_option_t vf_opts_fields[] = {
OPT_INT("w", crop_w, M_OPT_MIN, .min = 0),
OPT_INT("h", crop_h, M_OPT_MIN, .min = 0),
OPT_INT("x", crop_x, M_OPT_MIN, .min = -1),
OPT_INT("y", crop_y, M_OPT_MIN, .min = -1),
{0}
};
const vf_info_t vf_info_crop = {
.description = "cropping",
.name = "crop",
.open = vf_open,
.priv_size = sizeof(struct vf_priv_s),
.priv_defaults = &vf_priv_dflt,
.options = vf_opts_fields,
};
//===========================================================================//
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