spherical.h

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/*
 * 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
 */

#ifndef AVUTIL_SPHERICAL_H
#define AVUTIL_SPHERICAL_H

#include <stddef.h>
#include <stdint.h>

enum AVSphericalProjection {
    AV_SPHERICAL_EQUIRECTANGULAR,

    AV_SPHERICAL_CUBEMAP,

    AV_SPHERICAL_EQUIRECTANGULAR_TILE,
};

typedef struct AVSphericalMapping {
    enum AVSphericalProjection projection;

    int32_t yaw;   
    int32_t pitch; 
    int32_t roll;  

    uint32_t bound_left;   
    uint32_t bound_top;    
    uint32_t bound_right;  
    uint32_t bound_bottom; 

    uint32_t padding;
} AVSphericalMapping;

AVSphericalMapping *av_spherical_alloc(size_t *size);

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);

const char *av_spherical_projection_name(enum AVSphericalProjection projection);

int av_spherical_from_name(const char *name);
#endif /* AVUTIL_SPHERICAL_H */