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/* rotate.c
Copyright (c) 2003-2015 HandBrake Team
This file is part of the HandBrake source code
Homepage: <http://handbrake.fr/>.
It may be used under the terms of the GNU General Public License v2.
For full terms see the file COPYING file or visit http://www.gnu.org/licenses/gpl-2.0.html
*/
#include "common.h"
#include "avfilter_priv.h"
static int rotate_init(hb_filter_object_t * filter, hb_filter_init_t * init);
const char rotate_template[] =
"angle=^(0|90|180|270)$:hflip=^"HB_BOOL_REG"$:disable=^"HB_BOOL_REG"$";
hb_filter_object_t hb_filter_rotate =
{
.id = HB_FILTER_ROTATE,
.enforce_order = 1,
.skip = 1,
.name = "Rotate",
.settings = NULL,
.init = rotate_init,
.work = hb_avfilter_null_work,
.close = hb_avfilter_alias_close,
.settings_template = rotate_template,
};
/* Rotate Settings:
* degrees:mirror
*
* degrees - Rotation angle, may be one of 90, 180, or 270
* mirror - Mirror image around x axis
*
* Examples:
* Mode 180:1 Mirror then rotate 180'
* Mode 0:1 Mirror
* Mode 180:0 Rotate 180'
* Mode 90:0 Rotate 90'
* Mode 270:0 Rotate 270'
*
* Legacy Mode Examples (also accepted):
* Mode 1: Flip vertically (y0 becomes yN and yN becomes y0) (aka 180:1)
* Mode 2: Flip horizontally (x0 becomes xN and xN becomes x0) (aka 0:1)
* Mode 3: Flip both horizontally and vertically (aka 180:0)
* Mode 4: Rotate 90' (aka 90:0)
* Mode 7: Flip horiz & vert plus Rotate 90' (aka 270:0)
*/
static int rotate_init(hb_filter_object_t * filter, hb_filter_init_t * init)
{
hb_filter_private_t * pv = NULL;
pv = calloc(1, sizeof(struct hb_filter_private_s));
filter->private_data = pv;
if (pv == NULL)
{
return 1;
}
pv->input = *init;
hb_dict_t * settings = filter->settings;
int width = init->geometry.width;
int height = init->geometry.height;
const char * trans = NULL;
int angle = 0, flip = 0, hflip = 0, vflip = 0, tmp;
hb_dict_extract_int(&angle, settings, "angle");
hb_dict_extract_bool(&flip, settings, "hflip");
const char * clock;
const char * cclock;
if (flip)
{
clock = "clock_flip";
cclock = "cclock_flip";
}
else
{
clock = "clock";
cclock = "cclock";
}
switch (angle)
{
case 0:
hflip = flip;
break;
case 90:
trans = clock;
tmp = width;
width = height;
height = tmp;
break;
case 180:
vflip = 1;
hflip = !flip;
break;
case 270:
trans = cclock;
tmp = width;
width = height;
height = tmp;
break;
default:
break;
}
if (trans != NULL)
{
hb_dict_t * avfilter = hb_dict_init();
hb_dict_t * avsettings = hb_dict_init();
hb_dict_set(avsettings, "dir", hb_value_string(trans));
hb_dict_set(avfilter, "transpose", avsettings);
pv->avfilters = avfilter;
}
else if (hflip || vflip)
{
hb_value_array_t * avfilters = hb_value_array_init();
hb_dict_t * avfilter;
if (vflip)
{
avfilter = hb_dict_init();
hb_dict_set(avfilter, "vflip", hb_value_null());
hb_value_array_append(avfilters, avfilter);
}
if (hflip)
{
avfilter = hb_dict_init();
hb_dict_set(avfilter, "hflip", hb_value_null());
hb_value_array_append(avfilters, avfilter);
}
pv->avfilters = avfilter;
}
else
{
pv->avfilters = hb_value_null();
}
init->geometry.width = width;
init->geometry.height = height;
pv->output = *init;
return 0;
}
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