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/* Simple Video4Linux image grabber. Made for my Philips Vesta Pro
*
* Definition of options
*
* Copyright (C) 2002 Jens Gecius, Hannover, Germany
* eMail: devel@gecius.de
*
* 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 you 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 "v_utils.h"
/* Initializes the mapping of driver memory to vgrabbj */
void init_mmap(struct vconfig *vconf) {
if (vconf->usemmap) {
if ( (vconf->map = mmap(0, vconf->vbuf.size, PROT_READ, MAP_SHARED, vconf->dev, 0)) < 0 )
v_error(vconf, LOG_CRIT, "Could not get mmap-area of size %d", vconf->vbuf.size);
if ( ioctl(vconf->dev, VIDIOCGMBUF, &vconf->vbuf) < 0 )
v_error(vconf, LOG_CRIT, "Could not initialize mmap-vars");
v_error(vconf, LOG_DEBUG, "Size allocated for framebuffer: %d", vconf->vbuf.size);
if (!vconf->map)
v_error(vconf, LOG_CRIT, "mmap'ed area not allocated");
}
}
/* Free's allocated mmap (if it exists) */
void free_mmap(struct vconfig *vconf) {
if (vconf->map) {
if (!munmap(vconf->map, vconf->vbuf.size)) {
v_error(vconf, LOG_DEBUG, "mmap'ed area 'freed'");
vconf->map=NULL;
}
else
v_error(vconf, LOG_ERR, "Error %d occured while unmapping map", errno);
}
else
v_error(vconf, LOG_WARNING, "There was no map allocated to be freed...");
}
/* Open Input Device */
void open_device(struct vconfig *vconf) {
int err_count=0;
while ( ((vconf->dev=open(vconf->in, O_RDONLY)) < 0) && (!(err_count++>200)) )
usleep(25000);
if (err_count>200)
v_error(vconf, LOG_ERR, "Problem opening input-device %s", vconf->in);
else
v_error(vconf, LOG_DEBUG, "Device %s successfully opened", vconf->in);
}
/* Closing Input Device */
void close_device(struct vconfig *vconf) {
if(vconf->dev) {
if ( (vconf->dev=close(vconf->dev)) )
v_error(vconf, LOG_ERR, "Error while closing %s", vconf->in);
else
v_error(vconf, LOG_DEBUG, "Device %s closed", vconf->in);
}
else
v_error(vconf, LOG_WARNING, "Device %s was already closed...", vconf->in);
}
/* following code thanks to David Austin */
int set_picture_parms(struct vconfig *vconf) {
if ((vconf->hue < 0) && (vconf->brightness < 0) &&
(vconf->colour < 0) && (vconf->contrast < 0) &&
(vconf->whiteness < 0)) {
return 0;
}
fprintf(stderr, "Setting picture params %i %i %i %i %i\n",
vconf->hue, vconf->brightness, vconf->colour,
vconf->contrast, vconf->whiteness);
if (ioctl(vconf->dev, VIDIOCGPICT, &(vconf->vpic)) == -1) {
perror ("PICTURE");
return (-1);
}
if (vconf->hue > -1)
vconf->vpic.hue = vconf->hue;
if (vconf->contrast > -1)
vconf->vpic.contrast = vconf->contrast;
if (vconf->brightness > -1)
vconf->vpic.brightness = vconf->brightness;
if (vconf->colour > -1)
vconf->vpic.colour = vconf->colour;
if (vconf->whiteness > -1)
vconf->vpic.whiteness = vconf->whiteness;
if (ioctl(vconf->dev, VIDIOCSPICT, &(vconf->vpic)) == -1) {
perror ("PICTURE");
return (-1);
}
return 0;
}
/* Returns the actual byte-size of the image */
int img_size(struct vconfig *vconf, int palette) {
return ( (plist[palette].mul * vconf->win.width * vconf->win.height) >> (plist[palette].div==2?1:0) );
}
/* Turns RGB into BGR (or vice versa) */
unsigned char *switch_color(struct vconfig *vconf) {
char a;
long int y;
v_error(vconf, LOG_DEBUG, "width: %d, heigth: %d", vconf->win.width, vconf->win.height);
for (y = 0; y < (vconf->win.width * vconf->win.height); y++) {
memcpy(&a, vconf->o_buffer+(y*3),1);
memcpy(vconf->o_buffer+(y*3), vconf->o_buffer+(y*3)+2, 1);
memcpy(vconf->o_buffer+(y*3)+2, &a, 1);
}
return vconf->o_buffer;
}
/* Strips last byte of RGB32 to convert to RGB24 - breaks picture if alpha is used! */
unsigned char *conv_rgb32_rgb24(struct vconfig *vconf) {
long int y;
for (y = 0; y < (vconf->win.width * vconf->win.height); y++)
memcpy(vconf->o_buffer+(y*3), vconf->buffer+(y*4), 3);
return vconf->o_buffer;
}
/* Swap Left to Right (like a mirror) */
unsigned char *swap_left_right(char *buffer, int width, int height)
{
char a, b, c;
int i, j;
for (j=0;j < height;j++) {
for (i=0;i < (width>>1);i++) {
a = buffer[(j*width*3)+(i*3)];
b = buffer[(j*width*3)+(i*3)+1];
c = buffer[(j*width*3)+(i*3)+2];
buffer[(j*width*3)+(i*3)] = buffer[(j*width*3)+(width-i)*3];
buffer[(j*width*3)+(i*3)+1] = buffer[(j*width*3)+(width-i)*3+1];
buffer[(j*width*3)+(i*3)+2] = buffer[(j*width*3)+(width-i)*3+2];
buffer[(j*width*3)+(width-i)*3] = a;
buffer[(j*width*3)+(width-i)*3+1] = b;
buffer[(j*width*3)+(width-i)*3+2] = c;
}
}
return buffer;
}
/* Swap Top to Bottom (like a mirror) */
/* Thanks to Koos van den Hout and Arthur van Leeuwen */
unsigned char *swap_top_bottom(char *buffer, int width, int height)
{
char a, b, c;
int i, j;
for (j=0;j < (height>>1);j++) {
for (i=0;i < width;i++) {
a = buffer[(j*width*3)+(i*3)];
b = buffer[(j*width*3)+(i*3)+1];
c = buffer[(j*width*3)+(i*3)+2];
buffer[(j*width*3)+(i*3)] = buffer[((height-j)*width*3)+(i*3)];
buffer[(j*width*3)+(i*3)+1] = buffer[((height-j)*width*3)+(i*3)+1];
buffer[(j*width*3)+(i*3)+2] = buffer[((height-j)*width*3)+(i*3)+2];
buffer[((height-j)*width*3)+(i*3)] = a;
buffer[((height-j)*width*3)+(i*3)+1] = b;
buffer[((height-j)*width*3)+(i*3)+2] = c;
}
}
return buffer;
}
/* Adjustment of brightness of picture */
int brightness_adj(struct vconfig *vconf, int *brightness)
{
long i, tot = 0;
long size = vconf->win.width * vconf->win.height;
for ( i = 0; i < size * 3; i++ )
tot += vconf->buffer[i];
*brightness = (128 - tot/(size*3))/3;
return !((tot/(size*3)) >= 126 && (tot/(size*3)) <= 130);
}
/* Event handler for SIGKILL */
/* to properly clean up on externally requested termination */
void sigterm();
void sigterm() {
signal(SIGTERM,sigterm); /* reset signal */
syslog(LOG_WARNING, "Caught sigterm, cleaning up...");
signal_terminate=SIGTERM;
}
/* Event handler for SIGHUP */
/* to re-read the configuration file */
void sighup();
void sighup() {
signal(SIGHUP,sighup); /* reset signal */
syslog(LOG_WARNING, "Caught sighup, re-reading config-file...");
signal_terminate=SIGHUP;
}
/* Checks whether a ptr is allocated, if so, free it */
void *free_ptr(void *buf) {
if (buf) free(buf);
return NULL;
}
/* Daemonize vgrabbj only if in daemon-mode */
int daemonize(struct vconfig *vconf, char *progname)
{
openlog(progname, LOG_DEBUG, LOG_DAEMON);
v_error(vconf, LOG_WARNING, "Forking for daemon mode");
switch( fork() )
{
case 0: // Child
v_error(vconf, LOG_DEBUG, "I'm the child process and are going to read images...");
closelog();
vconf->init_done=TRUE;
break;
case -1: /* Error */
v_error(vconf, LOG_CRIT, "Can't fork, exiting..."); // exit
break;
default: /* Parent */
v_error(vconf, LOG_DEBUG, "I'm the parent and exiting now"
"(child takes care of the rest).");
closelog();
cleanup(vconf);
exit(0);
}
openlog(progname, LOG_PID, LOG_DAEMON);
v_error(vconf, LOG_WARNING, "%s started, reading from %s", progname, vconf->in);
return(1);
}
/* These are more or less self-explanatory */
char *timestring(char *format) {
time_t td;
struct tm *tm;
int i=1;
char archive[512];
/* for stamp and archive strftime format strings are used, make the final path
* to archive_path */
time(&td);
tm = localtime(&td);
while (i<512) {
archive[i++]='0';
}
archive[sizeof(archive)-1]='\0';
i=strftime(archive, sizeof(archive)-1, format, tm);
// fprintf(stdout, "ts=%s.%d\n", archive,i);
return (strcpy(malloc(++i),archive));
}
char *strip_white(char *value) {
long int tmp=0;
/* eliminate whitespaces in value */
while ((value[0]==' ') || (value[0]=='\t') || (value[0]=='"')) value++;
tmp=strlen(value);
while ((value[--tmp]==' ') || (value[tmp]=='\t') || (value[tmp]=='"')) value[tmp]='\0';
return value;
}
long int check_minmax(struct vconfig *vconf, char *value, long int tmp, int n, struct v_options l_opt) {
if (l_opt.max_value || tmp < 0)
if ( (l_opt.min_value > tmp) || (tmp > l_opt.max_value) )
v_error(vconf, LOG_CRIT, "Wrong value \"%s\" for %s (line %d, %s, min %d, max %d)",
value, l_opt.name, n, n?vconf->conf_file:"command-line", l_opt.min_value,
l_opt.max_value);
v_error(vconf, LOG_DEBUG, "Set option %s to value %d (value: %s)", l_opt.name, tmp, value);
return tmp;
}
char *check_maxlen(struct vconfig *vconf, char *value, struct v_options l_opt, int n) {
// value=strip_white(value);
if ( (l_opt.max_length) && (strlen((value)) > l_opt.max_length) )
v_error(vconf, LOG_CRIT, "Value \"%s\" too long (max. %d, line %d, %s)", value,
l_opt.max_length, n, n?vconf->conf_file:"command-line");
v_error(vconf, LOG_DEBUG, "Set option %s to value \"%s\"", l_opt.name, value);
return value;
}
char *get_str(char *value, char *var) {
int t;
if (var) free (var);
if ( (t=strlen(value))<1 )
return NULL;
value=strip_white(value);
var=strcpy(malloc(t+1),value);
return var;
}
long int get_int(char *value) {
long tmp;
if ( sscanf(value, "%ld", &tmp) != 1 )
return -1;
return tmp;
}
int get_bool(char *value) {
if ( !(strcasecmp(value, "oN")) || !(strcasecmp(value, "Yes")))
return 1;
else if ( !(strcasecmp(value, "Off")) || !(strcasecmp(value, "No")) )
return 0;
return -1;
}
int get_format(char *value) {
int i;
for (i=0; output_list[i].name; i++) {
if ( !(strcasecmp(value, output_list[i].name)) )
return output_list[i].type;
}
return -1;
}
int get_position(char *value) {
int i;
if ((i=get_int(value))!=-1)
return i;
for (i=0; position_list[i].name; i++) {
if ( !(strcasecmp(value, position_list[i].name)) )
return position_list[i].type;
}
return -1;
}
int decode_size(char *value) {
int i;
for (i=0; size_list[i].name; i++) {
if ( !(strcasecmp(value, size_list[i].name)) )
return size_list[i].type;
}
return 0;
}
int get_width(char *value) {
return (16 * decode_size(value));
}
int get_height(char *value) {
if ( decode_size(value) == 11 )
return 144;
else if ( decode_size(value) == 22 )
return 288;
else if ( decode_size(value) == 80 )
return 1024;
return (12 * decode_size(value));
}
/* If a SIGHUP was caught, do only re-initialisation */
struct vconfig *v_reinit(struct vconfig *vconf) {
return (vconf=v_init(vconf, 0, '\0'));
}
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