libexplain  1.4.D001
libexplain/buffer/v4l2_event.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 
00021 #include <libexplain/buffer/hexdump.h>
00022 #include <libexplain/buffer/int32_t.h>
00023 #include <libexplain/buffer/timespec.h>
00024 #include <libexplain/buffer/v4l2_event.h>
00025 #include <libexplain/buffer/v4l2_event_type.h>
00026 #include <libexplain/buffer/v4l2_event_vsync.h>
00027 #include <libexplain/buffer/pointer.h>
00028 #include <libexplain/is_efault.h>
00029 #include <libexplain/sizeof.h>
00030 
00031 
00032 #ifdef HAVE_LINUX_VIDEODEV2_H
00033 #ifdef VIDIOC_DQEVENT
00034 
00035 
00036 void
00037 explain_buffer_v4l2_event(explain_string_buffer_t *sb,
00038     const struct v4l2_event *data, int extra)
00039 {
00040     if (explain_is_efault_pointer(data, sizeof(*data)))
00041     {
00042         explain_buffer_pointer(sb, data);
00043         return;
00044     }
00045 
00046     explain_string_buffer_puts(sb, "{ type = ");
00047     explain_buffer_v4l2_event_type(sb, data->type);
00048     if (extra)
00049     {
00050         switch (data->type)
00051         {
00052         case V4L2_EVENT_VSYNC:
00053             explain_string_buffer_puts(sb, ", u.vsync = ");
00054             explain_buffer_v4l2_event_vsync(sb, &data->u.vsync);
00055             break;
00056 
00057         case V4L2_EVENT_PRIVATE_START:
00058             explain_string_buffer_puts(sb, ", u.data = ");
00059             explain_buffer_mostly_text(sb, data->u.data, sizeof(data->u.data));
00060             break;
00061 
00062         default:
00063             break;
00064         }
00065         explain_string_buffer_puts(sb, ", pending = ");
00066         explain_buffer_uint32_t(sb, data->pending);
00067         explain_string_buffer_puts(sb, ", sequence = ");
00068         explain_buffer_uint32_t(sb, data->sequence);
00069         explain_string_buffer_puts(sb, ", timestamp = ");
00070         explain_buffer_timespec(sb, &data->timestamp);
00071     }
00072     if (!explain_uint32_array_all_zero(data->reserved, SIZEOF(data->reserved)))
00073     {
00074         explain_string_buffer_puts(sb, ", reserved = ");
00075         explain_buffer_uint32_array(sb, data->reserved, SIZEOF(data->reserved));
00076     }
00077     explain_string_buffer_puts(sb, " }");
00078 }
00079 
00080 #endif
00081 #endif
00082 
00083 /* vim: set ts=8 sw=4 et : */