LCOV - code coverage report
Current view: top level - libavutil - spherical.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 19 27 70.4 %
Date: 2017-12-15 02:19:58 Functions: 3 4 75.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2016 Vittorio Giovara <vittorio.giovara@gmail.com>
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : #include "mem.h"
      22             : #include "spherical.h"
      23             : 
      24           2 : AVSphericalMapping *av_spherical_alloc(size_t *size)
      25             : {
      26           2 :     AVSphericalMapping *spherical = av_mallocz(sizeof(AVSphericalMapping));
      27           2 :     if (!spherical)
      28           0 :         return NULL;
      29             : 
      30           2 :     if (size)
      31           2 :         *size = sizeof(*spherical);
      32             : 
      33           2 :     return spherical;
      34             : }
      35             : 
      36           4 : void av_spherical_tile_bounds(const AVSphericalMapping *map,
      37             :                               size_t width, size_t height,
      38             :                               size_t *left, size_t *top,
      39             :                               size_t *right, size_t *bottom)
      40             : {
      41             :     /* conversion from 0.32 coordinates to pixels */
      42           8 :     uint64_t orig_width  = (uint64_t) width  * UINT32_MAX /
      43           4 :                            (UINT32_MAX - map->bound_right  - map->bound_left);
      44           8 :     uint64_t orig_height = (uint64_t) height * UINT32_MAX /
      45           4 :                            (UINT32_MAX - map->bound_bottom - map->bound_top);
      46             : 
      47             :     /* add a (UINT32_MAX - 1) to round up integer division */
      48           4 :     *left   = (orig_width  * map->bound_left + UINT32_MAX - 1) / UINT32_MAX;
      49           4 :     *top    = (orig_height * map->bound_top  + UINT32_MAX - 1) / UINT32_MAX;
      50           4 :     *right  = orig_width  - width  - *left;
      51           4 :     *bottom = orig_height - height - *top;
      52           4 : }
      53             : 
      54             : static const char *spherical_projection_names[] = {
      55             :     [AV_SPHERICAL_EQUIRECTANGULAR]      = "equirectangular",
      56             :     [AV_SPHERICAL_CUBEMAP]              = "cubemap",
      57             :     [AV_SPHERICAL_EQUIRECTANGULAR_TILE] = "tiled equirectangular",
      58             : };
      59             : 
      60           4 : const char *av_spherical_projection_name(enum AVSphericalProjection projection)
      61             : {
      62           4 :     if ((unsigned)projection >= FF_ARRAY_ELEMS(spherical_projection_names))
      63           0 :         return "unknown";
      64             : 
      65           4 :     return spherical_projection_names[projection];
      66             : }
      67             : 
      68           0 : int av_spherical_from_name(const char *name)
      69             : {
      70             :     int i;
      71             : 
      72           0 :     for (i = 0; i < FF_ARRAY_ELEMS(spherical_projection_names); i++) {
      73           0 :         size_t len = strlen(spherical_projection_names[i]);
      74           0 :         if (!strncmp(spherical_projection_names[i], name, len))
      75           0 :             return i;
      76             :     }
      77             : 
      78           0 :     return -1;
      79             : }

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