/usr/include/vlc/plugins/vlc_viewpoint.h is in libvlccore-dev 3.0.1-3build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* vlc_viewpoint.h: viewpoint struct and helpers
*****************************************************************************
* Copyright (C) 2017 VLC authors and VideoLAN
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef VLC_VIEWPOINT_H_
#define VLC_VIEWPOINT_H_ 1
#include <vlc_common.h>
#include <math.h>
/**
* \defgroup output Output
* \ingroup output
*
* @{
* \file
* Video and audio viewpoint struct and helpers
*/
#define FIELD_OF_VIEW_DEGREES_DEFAULT 80.f
#define FIELD_OF_VIEW_DEGREES_MAX 150.f
#define FIELD_OF_VIEW_DEGREES_MIN 20.f
/**
* Viewpoints
*/
struct vlc_viewpoint_t {
float yaw; /* yaw in degrees */
float pitch; /* pitch in degrees */
float roll; /* roll in degrees */
float fov; /* field of view in degrees */
};
static inline void vlc_viewpoint_init( vlc_viewpoint_t *p_vp )
{
p_vp->yaw = p_vp->pitch = p_vp->roll = 0.0f;
p_vp->fov = FIELD_OF_VIEW_DEGREES_DEFAULT;
}
static inline void vlc_viewpoint_clip( vlc_viewpoint_t *p_vp )
{
p_vp->yaw = fmodf( p_vp->yaw, 360.f );
p_vp->pitch = fmodf( p_vp->pitch, 360.f );
p_vp->roll = fmodf( p_vp->roll, 360.f );
p_vp->fov = VLC_CLIP( p_vp->fov, FIELD_OF_VIEW_DEGREES_MIN,
FIELD_OF_VIEW_DEGREES_MAX );
}
/**@}*/
#endif /* VLC_VIEWPOINT_H_ */
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