mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
1cd58e9154
Reflects the actual code and silences a gcc warning: ffprobe.c:1797:42: warning: passing argument 1 of 'av_spherical_tile_bounds' discards 'const' qualifier from pointer target type
53 lines
2.0 KiB
C
53 lines
2.0 KiB
C
/*
|
|
* Copyright (c) 2016 Vittorio Giovara <vittorio.giovara@gmail.com>
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "mem.h"
|
|
#include "spherical.h"
|
|
|
|
AVSphericalMapping *av_spherical_alloc(size_t *size)
|
|
{
|
|
AVSphericalMapping *spherical = av_mallocz(sizeof(AVSphericalMapping));
|
|
if (!spherical)
|
|
return NULL;
|
|
|
|
if (size)
|
|
*size = sizeof(*spherical);
|
|
|
|
return spherical;
|
|
}
|
|
|
|
void av_spherical_tile_bounds(const AVSphericalMapping *map,
|
|
size_t width, size_t height,
|
|
size_t *left, size_t *top,
|
|
size_t *right, size_t *bottom)
|
|
{
|
|
/* conversion from 0.32 coordinates to pixels */
|
|
uint64_t orig_width = (uint64_t) width * UINT32_MAX /
|
|
(UINT32_MAX - map->bound_right - map->bound_left);
|
|
uint64_t orig_height = (uint64_t) height * UINT32_MAX /
|
|
(UINT32_MAX - map->bound_bottom - map->bound_top);
|
|
|
|
/* add a (UINT32_MAX - 1) to round up integer division */
|
|
*left = (orig_width * map->bound_left + UINT32_MAX - 1) / UINT32_MAX;
|
|
*top = (orig_height * map->bound_top + UINT32_MAX - 1) / UINT32_MAX;
|
|
*right = orig_width - width - *left;
|
|
*bottom = orig_height - height - *top;
|
|
}
|