tor-browser

The Tor Browser
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stereo3d.c (4188B)

      1 /*
      2 * Copyright (c) 2013 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 <string.h>
     22 
     23 #include "avstring.h"
     24 #include "frame.h"
     25 #include "macros.h"
     26 #include "mem.h"
     27 #include "stereo3d.h"
     28 
     29 static void get_defaults(AVStereo3D *stereo)
     30 {
     31    stereo->horizontal_disparity_adjustment = (AVRational) { 0, 1 };
     32    stereo->horizontal_field_of_view = (AVRational) { 0, 1 };
     33 }
     34 
     35 AVStereo3D *av_stereo3d_alloc(void)
     36 {
     37    return av_stereo3d_alloc_size(NULL);
     38 }
     39 
     40 AVStereo3D *av_stereo3d_alloc_size(size_t *size)
     41 {
     42    AVStereo3D *stereo = av_mallocz(sizeof(AVStereo3D));
     43    if (!stereo)
     44        return NULL;
     45 
     46    get_defaults(stereo);
     47 
     48    if (size)
     49        *size = sizeof(*stereo);
     50 
     51    return stereo;
     52 }
     53 
     54 AVStereo3D *av_stereo3d_create_side_data(AVFrame *frame)
     55 {
     56    AVFrameSideData *side_data = av_frame_new_side_data(frame,
     57                                                        AV_FRAME_DATA_STEREO3D,
     58                                                        sizeof(AVStereo3D));
     59    if (!side_data)
     60        return NULL;
     61 
     62    memset(side_data->data, 0, sizeof(AVStereo3D));
     63    get_defaults((AVStereo3D *)side_data->data);
     64 
     65    return (AVStereo3D *)side_data->data;
     66 }
     67 
     68 static const char * const stereo3d_type_names[] = {
     69    [AV_STEREO3D_2D]                  = "2D",
     70    [AV_STEREO3D_SIDEBYSIDE]          = "side by side",
     71    [AV_STEREO3D_TOPBOTTOM]           = "top and bottom",
     72    [AV_STEREO3D_FRAMESEQUENCE]       = "frame alternate",
     73    [AV_STEREO3D_CHECKERBOARD]        = "checkerboard",
     74    [AV_STEREO3D_SIDEBYSIDE_QUINCUNX] = "side by side (quincunx subsampling)",
     75    [AV_STEREO3D_LINES]               = "interleaved lines",
     76    [AV_STEREO3D_COLUMNS]             = "interleaved columns",
     77    [AV_STEREO3D_UNSPEC]              = "unspecified",
     78 };
     79 
     80 static const char * const stereo3d_view_names[] = {
     81    [AV_STEREO3D_VIEW_PACKED] = "packed",
     82    [AV_STEREO3D_VIEW_LEFT]   = "left",
     83    [AV_STEREO3D_VIEW_RIGHT]  = "right",
     84    [AV_STEREO3D_VIEW_UNSPEC] = "unspecified",
     85 };
     86 
     87 static const char * const stereo3d_primary_eye_names[] = {
     88    [AV_PRIMARY_EYE_NONE]  = "none",
     89    [AV_PRIMARY_EYE_LEFT]  = "left",
     90    [AV_PRIMARY_EYE_RIGHT] = "right",
     91 };
     92 
     93 const char *av_stereo3d_type_name(unsigned int type)
     94 {
     95    if (type >= FF_ARRAY_ELEMS(stereo3d_type_names))
     96        return "unknown";
     97 
     98    return stereo3d_type_names[type];
     99 }
    100 
    101 int av_stereo3d_from_name(const char *name)
    102 {
    103    int i;
    104 
    105    for (i = 0; i < FF_ARRAY_ELEMS(stereo3d_type_names); i++) {
    106        if (av_strstart(name, stereo3d_type_names[i], NULL))
    107            return i;
    108    }
    109 
    110    return -1;
    111 }
    112 
    113 const char *av_stereo3d_view_name(unsigned int view)
    114 {
    115    if (view >= FF_ARRAY_ELEMS(stereo3d_view_names))
    116        return "unknown";
    117 
    118    return stereo3d_view_names[view];
    119 }
    120 
    121 int av_stereo3d_view_from_name(const char *name)
    122 {
    123    int i;
    124 
    125    for (i = 0; i < FF_ARRAY_ELEMS(stereo3d_view_names); i++) {
    126        if (av_strstart(name, stereo3d_view_names[i], NULL))
    127            return i;
    128    }
    129 
    130    return -1;
    131 }
    132 
    133 const char *av_stereo3d_primary_eye_name(unsigned int eye)
    134 {
    135    if (eye >= FF_ARRAY_ELEMS(stereo3d_primary_eye_names))
    136        return "unknown";
    137 
    138    return stereo3d_primary_eye_names[eye];
    139 }
    140 
    141 int av_stereo3d_primary_eye_from_name(const char *name)
    142 {
    143    int i;
    144 
    145    for (i = 0; i < FF_ARRAY_ELEMS(stereo3d_primary_eye_names); i++) {
    146        if (av_strstart(name, stereo3d_primary_eye_names[i], NULL))
    147            return i;
    148    }
    149 
    150    return -1;
    151 }