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/******************************************************************************#
# guvcview http://guvcview.sourceforge.net #
# #
# Paulo Assis <pj.assis@gmail.com> #
# #
# This program is free software; you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation; either version 2 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 General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program; if not, write to the Free Software #
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA #
# #
*******************************************************************************/
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/videodev2.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include "control_profile.h"
#include "gviewv4l2core.h"
#include "v4l2_controls.h"
// #include "../config.h"
extern int verbosity;
/*
* save the device control values into a profile file
* args:
* vd - pointer to video device data
* filename - profile filename
*
* asserts:
* vd is not null
*
* returns: error code (0 -E_OK)
*/
int save_control_profile(v4l2_dev_t *vd, const char *filename) {
/*assertions*/
assert(vd != NULL);
FILE *fp;
fp = fopen(filename, "w");
if (fp == NULL) {
fprintf(
stderr,
"V4L2_CORE: (save_control_profile) Could not open %s for write: %s\n",
filename, strerror(errno));
return (E_FILE_IO_ERR);
} else {
if (vd->list_device_controls) {
v4l2_ctrl_t *current = vd->list_device_controls;
/*write header*/
fprintf(fp, "#V4L2/CTRL/0.0.2\n");
fprintf(fp, "APP{\"%s\"}\n", PACKAGE_STRING);
/*write control data*/
fprintf(fp, "# control data\n");
for (; current != NULL; current = current->next) {
if ((current->control.flags & V4L2_CTRL_FLAG_WRITE_ONLY) ||
(current->control.flags & V4L2_CTRL_FLAG_READ_ONLY) ||
(current->control.flags & V4L2_CTRL_FLAG_GRABBED)) {
if (verbosity > 0)
printf("V4L2_CORE: (save_control_profile) skiping control 0x%08x\n",
current->control.id);
continue;
}
fprintf(fp, "#%s\n", current->control.name);
switch (current->control.type) {
case V4L2_CTRL_TYPE_STRING:
fprintf(fp, "ID{0x%08x};CHK{%i:%i:%i:0}=STR{\"%s\"}\n",
current->control.id, current->control.minimum,
current->control.maximum, current->control.step,
current->string);
break;
case V4L2_CTRL_TYPE_INTEGER64:
fprintf(fp, "ID{0x%08x};CHK{0:0:0:0}=VAL64{%" PRId64 "}\n",
current->control.id, current->value64);
break;
default:
fprintf(fp, "ID{0x%08x};CHK{%i:%i:%i:%i}=VAL{%i}\n",
current->control.id, current->control.minimum,
current->control.maximum, current->control.step,
current->control.default_value, current->value);
break;
}
}
}
}
fflush(fp); /*flush stream buffers to filesystem*/
if (fsync(fileno(fp)) || fclose(fp)) {
fprintf(stderr,
"V4L2_CORE: (save_control_profile) write to file failed: %s\n",
strerror(errno));
return (E_FILE_IO_ERR);
}
return (E_OK);
}
/*
* load the device control values from a profile file
* args:
* vd - pointer to video device data
* filename - profile filename
*
* asserts:
* vd is not null
*
* returns: error code (0 -E_OK)
*/
int load_control_profile(v4l2_dev_t *vd, const char *filename) {
/*assertions*/
assert(vd != NULL);
FILE *fp;
int major = 0, minor = 0, rev = 0;
if ((fp = fopen(filename, "r")) != NULL) {
char line[200];
if (fgets(line, sizeof(line), fp) != NULL) {
if (sscanf(line, "#V4L2/CTRL/%3i.%3i.%3i", &major, &minor, &rev) == 3) {
// check standard version if needed
} else {
fprintf(stderr,
"V4L2_CORE: (load_control_profile) no valid header found\n");
fclose(fp);
return (E_NO_DATA);
}
} else {
fprintf(stderr,
"V4L2_CORE: (load_control_profile) no valid header found\n");
fclose(fp);
return (E_NO_DATA);
}
while (fgets(line, sizeof(line), fp) != NULL) {
int id = 0;
int min = 0, max = 0, step = 0, def = 0;
int32_t val = 0;
int64_t val64 = 0;
if ((line[0] != '#') && (line[0] != '\n')) {
if (sscanf(line, "ID{0x%08x};CHK{%5i:%5i:%5i:%5i}=VAL{%5i}", &id, &min,
&max, &step, &def, &val) == 6) {
v4l2_ctrl_t *current = v4l2core_get_control_by_id(vd, id);
if (current) {
/*check values*/
if (current->control.minimum == min &&
current->control.maximum == max &&
current->control.step == step &&
current->control.default_value == def) {
current->value = val;
}
}
} else if (sscanf(line, "ID{0x%08x};CHK{0:0:0:0}=VAL64{%" PRId64 "}",
&id, &val64) == 2) {
v4l2_ctrl_t *current = v4l2core_get_control_by_id(vd, id);
if (current) {
current->value64 = val64;
}
} else if (sscanf(line, "ID{0x%08x};CHK{%5i:%5i:%5i:0}=STR{\"%*s\"}",
&id, &min, &max, &step) == 5) {
v4l2_ctrl_t *current = v4l2core_get_control_by_id(vd, id);
if (current) {
/*check values*/
if (current->control.minimum == min &&
current->control.maximum == max &&
current->control.step == step) {
char str[max + 1];
char fmt[48];
sprintf(fmt, "ID{0x%%*x};CHK{%%*i:%%*i:%%*i:0}==STR{\"%%%is\"}",
max);
sscanf(line, fmt, str);
/*we are only scannig for max chars so this should never happen*/
if (strlen(str) >
max) /*FIXME: should also check (minimum +N*step)*/
{
fprintf(stderr,
"V4L2_CORE: (load_control_profile) string bigger than "
"maximum buffer size (%i > %i)\n",
(int)strlen(str), max);
if (current->string)
free(current->string);
current->string =
strndup(str, max); /*FIXME: does max includes '\0' ?*/
} else {
if (current->string)
free(current->string);
current->string = strndup(str, strlen(str) + 1);
}
}
}
}
}
}
set_v4l2_control_values(vd);
get_v4l2_control_values(vd);
} else {
fprintf(
stderr,
"V4L2_CORE: (load_control_profile) Could not open for %s read: %s\n",
filename, strerror(errno));
return (E_FILE_IO_ERR);
}
fclose(fp);
return (E_OK);
}
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