libexplain  1.4.D001
libexplain/buffer/v4l2_crop.c
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00001 /*
00002  * libexplain - a library of system-call-specific strerror replacements
00003  * Copyright (C) 2011, 2013 Peter Miller
00004  *
00005  * This program is free software; you can redistribute it and/or modify
00006  * it under the terms of the GNU Lesser General Public License as
00007  * published by the Free Software Foundation; either version 3 of the
00008  * License, or (at your option) any later version.
00009  *
00010  * This program is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013  * Lesser General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU Lesser General Public License
00016  * along with this program. If not, see <http://www.gnu.org/licenses/>.
00017  */
00018 
00019 #include <libexplain/ac/linux/videodev2.h>
00020 #include <libexplain/ac/string.h>
00021 
00022 #include <libexplain/buffer/v4l2_buf_type.h>
00023 #include <libexplain/buffer/v4l2_crop.h>
00024 #include <libexplain/buffer/v4l2_rect.h>
00025 #include <libexplain/buffer/pointer.h>
00026 #include <libexplain/is_efault.h>
00027 
00028 
00029 #ifdef HAVE_LINUX_VIDEODEV2_H
00030 
00031 void
00032 explain_buffer_v4l2_crop(explain_string_buffer_t *sb,
00033     const struct v4l2_crop *data, int extra)
00034 {
00035     if (explain_is_efault_pointer(data, sizeof(*data)))
00036     {
00037         explain_buffer_pointer(sb, data);
00038         return;
00039     }
00040 
00041     explain_string_buffer_puts(sb, "{ type = ");
00042     explain_buffer_v4l2_buf_type(sb, data->type);
00043     if (extra)
00044     {
00045         explain_string_buffer_puts(sb, ", c = ");
00046         explain_buffer_v4l2_rect(sb, &data->c);
00047     }
00048     explain_string_buffer_puts(sb, " }");
00049 }
00050 
00051 
00052 enum explain_v4l2_crop_check_type_t
00053 explain_v4l2_crop_check_type(int fildes, const struct v4l2_crop *data)
00054 {
00055     if (explain_is_efault_pointer(data, sizeof(*data)))
00056         return explain_v4l2_crop_check_type_no_idea;
00057     switch (explain_v4l2_buf_type_check(fildes, data->type))
00058     {
00059     case explain_v4l2_buf_type_check_no_idea:
00060     default:
00061         return explain_v4l2_crop_check_type_no_idea;
00062 
00063     case explain_v4l2_buf_type_check_notsup:
00064         return explain_v4l2_crop_check_type_notsup;
00065 
00066     case explain_v4l2_buf_type_check_nosuch:
00067         return explain_v4l2_crop_check_type_nosuch;
00068 
00069     case explain_v4l2_buf_type_check_ok:
00070         break;
00071     }
00072     return explain_v4l2_crop_check_type_ok;
00073 }
00074 
00075 #endif
00076 
00077 /* vim: set ts=8 sw=4 et : */