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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 <stdbool.h>
#include <libavutil/common.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 struct vf_priv_s {
// These four values are a backup of the values parsed from the command line.
// This is necessary so that we do not get a mess upon filter reinit due to
// e.g. aspect changes and with only aspect specified on the command line,
// where we would otherwise use the values calculated for a different aspect
// instead of recalculating them again.
int cfg_exp_w, cfg_exp_h;
int cfg_exp_x, cfg_exp_y;
int exp_w,exp_h;
int exp_x,exp_y;
double aspect;
int round;
} const vf_priv_dflt = {
-1,-1,
-1,-1,
-1,-1,
-1,-1,
0.,
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;
vf->priv->exp_x = vf->priv->cfg_exp_x;
vf->priv->exp_y = vf->priv->cfg_exp_y;
vf->priv->exp_w = vf->priv->cfg_exp_w;
vf->priv->exp_h = vf->priv->cfg_exp_h;
if ( vf->priv->exp_w == -1 ) vf->priv->exp_w=width;
else if (vf->priv->exp_w < -1 ) vf->priv->exp_w=width - vf->priv->exp_w;
else if ( vf->priv->exp_w<width ) vf->priv->exp_w=width;
if ( vf->priv->exp_h == -1 ) vf->priv->exp_h=height;
else if ( vf->priv->exp_h < -1 ) vf->priv->exp_h=height - vf->priv->exp_h;
else if( vf->priv->exp_h<height ) vf->priv->exp_h=height;
if (vf->priv->aspect) {
float adjusted_aspect = vf->priv->aspect;
adjusted_aspect *= (double)in->p_w/in->p_h;
if (vf->priv->exp_h < vf->priv->exp_w / adjusted_aspect) {
vf->priv->exp_h = vf->priv->exp_w / adjusted_aspect + 0.5;
} else {
vf->priv->exp_w = vf->priv->exp_h * adjusted_aspect + 0.5;
}
}
if (vf->priv->round > 1) { // round up.
vf->priv->exp_w = (1 + (vf->priv->exp_w - 1) / vf->priv->round) * vf->priv->round;
vf->priv->exp_h = (1 + (vf->priv->exp_h - 1) / vf->priv->round) * vf->priv->round;
}
if(vf->priv->exp_x<0 || vf->priv->exp_x+width>vf->priv->exp_w) vf->priv->exp_x=(vf->priv->exp_w-width)/2;
if(vf->priv->exp_y<0 || vf->priv->exp_y+height>vf->priv->exp_h) vf->priv->exp_y=(vf->priv->exp_h-height)/2;
struct mp_imgfmt_desc fmt = mp_imgfmt_get_desc(in->imgfmt);
vf->priv->exp_x = MP_ALIGN_DOWN(vf->priv->exp_x, fmt.align_x);
vf->priv->exp_y = MP_ALIGN_DOWN(vf->priv->exp_y, fmt.align_y);
*out = *in;
out->w = vf->priv->exp_w;
out->h = vf->priv->exp_h;
return 0;
}
static struct mp_image *filter(struct vf_instance *vf, struct mp_image *mpi)
{
int e_x = vf->priv->exp_x, e_y = vf->priv->exp_y;
int e_w = vf->priv->exp_w, e_h = vf->priv->exp_h;
if (e_x == 0 && e_y == 0 && e_w == mpi->w && e_h == mpi->h)
return mpi;
struct mp_image *dmpi = vf_alloc_out_image(vf);
if (!dmpi) {
talloc_free(mpi);
return NULL;
}
mp_image_copy_attributes(dmpi, mpi);
struct mp_image cropped = *dmpi;
mp_image_crop(&cropped, e_x, e_y, e_x + mpi->w, e_y + mpi->h);
mp_image_copy(&cropped, mpi);
int e_x2 = e_x + MP_ALIGN_DOWN(mpi->w, mpi->fmt.align_x);
int e_y2 = e_y + MP_ALIGN_DOWN(mpi->h, mpi->fmt.align_y);
// top border (over the full width)
mp_image_clear(dmpi, 0, 0, e_w, e_y);
// bottom border (over the full width)
mp_image_clear(dmpi, 0, e_y2, e_w, e_h);
// left
mp_image_clear(dmpi, 0, e_y, e_x, e_y2);
// right
mp_image_clear(dmpi, e_x2, e_y, e_w, e_y2);
talloc_free(mpi);
return dmpi;
}
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->query_format=query_format;
vf->filter=filter;
return 1;
}
#define OPT_BASE_STRUCT struct vf_priv_s
static const m_option_t vf_opts_fields[] = {
OPT_INT("w", cfg_exp_w, 0),
OPT_INT("h", cfg_exp_h, 0),
OPT_INT("x", cfg_exp_x, M_OPT_MIN, .min = -1),
OPT_INT("y", cfg_exp_y, M_OPT_MIN, .min = -1),
OPT_DOUBLE("aspect", aspect, M_OPT_MIN, .min = 0),
OPT_INT("round", round, M_OPT_MIN, .min = 1),
{0}
};
const vf_info_t vf_info_expand = {
.description = "expanding",
.name = "expand",
.open = vf_open,
.priv_size = sizeof(struct vf_priv_s),
.priv_defaults = &vf_priv_dflt,
.options = vf_opts_fields,
};
//===========================================================================//
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