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/*
* libexplain - a library of system-call-specific strerror replacements
* Copyright (C) 2011 Peter Miller
* Written by Peter Miller <pmiller@opensource.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libexplain/ac/errno.h>
#include <libexplain/ac/linux/videodev2.h>
#include <libexplain/ac/string.h>
#include <libexplain/ac/sys/ioctl.h>
#include <libexplain/buffer/einval.h>
#include <libexplain/buffer/is_the_null_pointer.h>
#include <libexplain/buffer/v4l2_buf_type.h>
#include <libexplain/buffer/v4l2_hw_freq_seek.h>
#include <libexplain/buffer/v4l2_tuner.h>
#include <libexplain/iocontrol/generic.h>
#include <libexplain/iocontrol/vidioc_s_hw_freq_seek.h>
#include <libexplain/is_efault.h>
#ifdef VIDIOC_S_HW_FREQ_SEEK
static void
print_data(const explain_iocontrol_t *p, explain_string_buffer_t *sb,
int errnum, int fildes, int request, const void *data)
{
(void)p;
(void)errnum;
(void)request;
explain_buffer_v4l2_hw_freq_seek(sb, data, fildes);
}
static void
print_explanation(const explain_iocontrol_t *p, explain_string_buffer_t *sb,
int errnum, int fildes, int request, const void *data)
{
switch (errnum)
{
case EINVAL:
if (!data)
{
explain_buffer_is_the_null_pointer(sb, "data");
return;
}
{
const struct v4l2_hw_freq_seek *arg;
arg = data;
if (!explain_is_efault_pointer(arg, sizeof(*arg)))
{
struct v4l2_tuner qry;
int ntuners;
/*
* The tuner may be wrong.
*/
ntuners = explain_v4l2_tuner_get_n(fildes);
if (ntuners == 0)
{
explain_iocontrol_generic_print_explanation
(
p,
sb,
ENOTTY,
fildes,
request,
data
);
return;
}
if (ntuners > 0 && arg->tuner >= (unsigned)ntuners)
{
explain_buffer_einval_out_of_range
(
sb,
"data->tuner",
0,
ntuners - 1
);
return;
}
/*
* The type may be valid, but not supported by device.
* Specifically, it may not be the corerct type for this tuner.
*/
memset(&qry, 0, sizeof(qry));
qry.index = arg->tuner;
if
(
ioctl(fildes, VIDIOC_G_TUNER, &qry) >= 0
&&
qry.type != arg->type
)
{
explain_buffer_einval_vague(sb, "data->type");
explain_string_buffer_puts(sb->footnotes, "; ");
explain_string_buffer_puts
(
sb->footnotes,
/* FIXME: i18n */
"the tuner type is "
);
explain_buffer_v4l2_buf_type(sb, qry.type);
return;
}
}
}
/* No idea */
explain_buffer_einval_vague(sb, "data");
break;
default:
explain_iocontrol_generic_print_explanation
(
p,
sb,
errnum,
fildes,
request,
data
);
break;
}
}
const explain_iocontrol_t explain_iocontrol_vidioc_s_hw_freq_seek =
{
"VIDIOC_S_HW_FREQ_SEEK", /* name */
VIDIOC_S_HW_FREQ_SEEK, /* value */
0, /* disambiguate */
0, /* print_name */
print_data,
print_explanation,
0, /* print_data_returned */
sizeof(struct v4l2_hw_freq_seek), /* data_size */
"struct v4l2_hw_freq_seek *", /* data_type */
0, /* flags */
__FILE__,
__LINE__,
};
#else /* ndef VIDIOC_S_HW_FREQ_SEEK */
const explain_iocontrol_t explain_iocontrol_vidioc_s_hw_freq_seek =
{
0, /* name */
0, /* value */
0, /* disambiguate */
0, /* print_name */
0, /* print_data */
0, /* print_explanation */
0, /* print_data_returned */
0, /* data_size */
0, /* data_type */
0, /* flags */
__FILE__,
__LINE__,
};
#endif /* VIDIOC_S_HW_FREQ_SEEK */
/* vim: set ts=8 sw=4 et : */
|
