libexplain: libexplain/buffer/v4l2

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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 
00021 #include <libexplain/buffer/v4l2_buf_type.h>
00022 #include <libexplain/buffer/v4l2_cropcap.h>
00023 #include <libexplain/buffer/v4l2_fract.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_cropcap(explain_string_buffer_t *sb,
00033     const struct v4l2_cropcap *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, ", bounds = ");
00046         explain_buffer_v4l2_rect(sb, &data->bounds);
00047         explain_string_buffer_puts(sb, ", defrect = ");
00048         explain_buffer_v4l2_rect(sb, &data->defrect);
00049         explain_string_buffer_puts(sb, ", pixelaspect = ");
00050         explain_buffer_v4l2_fract(sb, &data->pixelaspect);
00051     }
00052     explain_string_buffer_puts(sb, " }");
00053 }
00054 
00055 
00056 enum explain_v4l2_cropcap_check_type_t
00057 explain_v4l2_cropcap_check_type(int fildes, const struct v4l2_cropcap *data)
00058 {
00059     if (explain_is_efault_pointer(data, sizeof(*data)))
00060         return explain_v4l2_cropcap_check_type_no_idea;
00061     switch (data->type)
00062     {
00063     case V4L2_BUF_TYPE_VIDEO_CAPTURE:
00064     case V4L2_BUF_TYPE_VIDEO_OUTPUT:
00065     case V4L2_BUF_TYPE_VIDEO_OVERLAY:
00066     case V4L2_BUF_TYPE_VBI_CAPTURE:
00067     case V4L2_BUF_TYPE_VBI_OUTPUT:
00068     case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
00069     case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
00070     case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
00071     case V4L2_BUF_TYPE_PRIVATE:
00072 #ifdef V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE
00073     case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
00074 #endif
00075 #ifdef V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE
00076     case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
00077 #endif
00078         switch (explain_v4l2_buf_type_check(fildes, data->type))
00079         {
00080         case explain_v4l2_buf_type_check_no_idea:
00081         default:
00082             return explain_v4l2_cropcap_check_type_no_idea;
00083 
00084         case explain_v4l2_buf_type_check_notsup:
00085             return explain_v4l2_cropcap_check_type_notsup;
00086 
00087         case explain_v4l2_buf_type_check_nosuch:
00088             return explain_v4l2_cropcap_check_type_nosuch;
00089 
00090         case explain_v4l2_buf_type_check_ok:
00091             break;
00092         }
00093         break;
00094 
00095     default:
00096         return explain_v4l2_cropcap_check_type_nosuch;
00097     }
00098     return explain_v4l2_cropcap_check_type_ok;
00099 }
00100 
00101 #endif
00102 
00103 
00104 /* vim: set ts=8 sw=4 et : */