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/* Simple Video4Linux image grabber. Made for my Philips Vesta Pro
*
* Copyright (C) 2000, 2001, 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 <vgrabbj.h>
#include <v_plist.h>
int signal_terminate=0;
void cleanup(struct vconfig *vconf) {
int tmp=vconf->loop;
v_update_ptr(vconf);
if (vconf->openonce) {
free_mmap(vconf);
close_device(vconf);
}
#ifdef LIBTTF
if ( vconf->use_ts && vconf->ttinit ) {
Face_Done(vconf->ttinit->instance, vconf->ttinit->face);
TT_Done_FreeType(vconf->ttinit->engine);
}
if ( vconf->ttinit ) {
vconf->ttinit->properties=free_ptr(vconf->ttinit->properties);
vconf->ttinit=free_ptr(vconf->ttinit);
}
vconf->timestamp=free_ptr(vconf->timestamp);
vconf->font=free_ptr(vconf->font);
v_error(vconf, LOG_DEBUG, "TrueType engine ended, vars freed");
#endif
vconf->buffer=free_ptr(vconf->buffer);
vconf->o_buffer=free_ptr(vconf->o_buffer);
v_error(vconf, LOG_DEBUG, "Buffers freed");
vconf->tmpout=free_ptr(vconf->tmpout);
vconf->in=free_ptr(vconf->in);
vconf->out=free_ptr(vconf->out);
vconf->conf_file=free_ptr(vconf->conf_file);
v_error(vconf, LOG_DEBUG, "vars freed");
vconf=free_ptr(vconf);
if ( tmp ) {
closelog();
_exit(1);
}
}
/* Event handler for SIGHUP */
/* to re-read the configuration file */
void v_error(struct vconfig *vconf, int msg, char *fmt, ...)
{
va_list arg_ptr;
static char buf[MAX_ERRORMSG_LENGTH];
/* Loglevels:
0 silent (NONE)
2 severe errors which cause vgrabbj to exit in daemon mode (LOG_CRIT)
3 critical errors which cause vgrabbj to exit in non-daemon mode
and retry forever in daemon-mode (with a sleep(1) inbetween) (LOG_ERR)
4 warning conditions (LOG_WARNING)
6 normal information (LOG_INFO)
7 debug information (LOG_DEBUG)
Every log-message with a loglevel equal-smaller than LOGLEVEL-Level (supplied
via command line, otherwise default=4) will be
a) displayed on screen (stderr) if non-daemon
b) written to syslog if daemon
One exception:
In daemon mode, every message before successful fork into background
will be written to stderr (if any).
*/
if ( msg <= vconf->debug ) {
va_start(arg_ptr, fmt);
vsprintf(buf, fmt, arg_ptr);
strcat(buf, "\n");
va_end(arg_ptr);
if (vconf->loop && vconf->init_done) {
syslog(msg, buf);
if (msg == 3) {
sleep(1);
}
} else {
fprintf(stderr, buf);
fflush(stderr);
}
}
/* Decision about exiting is independent of log or not to log */
if ( (vconf->loop && msg < 3) || (msg==3 && vconf->err_count++ > 3600) ) {
syslog(LOG_ERR, "Fatal Error (daemon), exiting...\n"); // exit
cleanup(vconf);
closelog();
_exit(1);
} else if ( !vconf->loop && msg < 4 ) {
fprintf(stderr, "Fatal Error (non-daemon), exiting...\n"); // exit
cleanup(vconf);
exit(1);
}
}
/* Get information from v4l device and show them */
void show_capabilities(char *in, char *pname)
{
struct video_capability cap;
struct video_window win;
struct video_picture pic;
int dev;
if ( (dev = open(in, O_RDONLY)) < 0 ) {
fprintf(stderr, "Can't open device %s\n", in);
exit(1);
}
if (ioctl(dev, VIDIOCGCAP, &cap) < 0) {
fprintf(stderr, "Can't get capabilities of device %s\n", in);
exit(1);
}
if (ioctl(dev, VIDIOCGPICT, &pic) < 0) {
fprintf(stderr, "Can't get picture properties of device %s\n", in);
exit(1);
}
if (ioctl(dev, VIDIOCGWIN, &win) < 0) {
fprintf(stderr, "Can't get overlay values of device %s\n", in);
exit(1);
}
fprintf(stderr,"%s, Version %s\n"
"Videodevice name: %s (%s)\n"
"Capabilities\n"
"Type : %d\tValues can be looked up at videodev.h\n"
"Channels : %d\n"
"Audio : %d\n"
"MaxWidth : %d\n"
"MaxHeight: %d\n"
"MinWidth : %d\n"
"MinHeigth: %d\n"
"\nCurrent Settings:\n"
"Brightness: %d\n"
"Hue : %d\n"
"Color : %d\n"
"Contrast : %d\n"
"Whiteness : %d\n"
"Depth : %d\n"
"Palette : %s (%d)\n"
"Width : %d\n"
"Height : %d\n"
"Chromakey : %d\n",
basename(pname), VERSION, in, cap.name, cap.type, cap.channels, cap.audios,
cap.maxwidth, cap.maxheight, cap.minwidth, cap.minheight,
pic.brightness, pic.hue, pic.colour, pic.contrast,
pic.whiteness, pic.depth, plist[pic.palette].name, pic.palette,
win.width, win.height, win.chromakey);
dev=close(dev);
if (dev)
fprintf(stderr, "Error occured while closing %s\n", in);
exit(0);
}
/* Read the image from device, adjust brightness, if wanted, for RGB24 */
unsigned char *read_image(struct vconfig *vconf, int size) {
int f, newbright;
int err_count;
int discard=vconf->discard;
v_error(vconf, LOG_DEBUG, "Palette to be used: %s (%d), size: %d",
plist[vconf->vpic.palette].name, vconf->vpic.palette, img_size(vconf, vconf->vpic.palette));
/* Opening input device */
if ( !vconf->openonce ) {
open_device(vconf);
/* and Re-initialize the palette, in case someone changed it meanwhile */
while (ioctl(vconf->dev, VIDIOCSPICT, &vconf->vpic) < 0 )
v_error(vconf, LOG_ERR, "Device %s couldn't be reset to known palette %s",
vconf->in, vconf->vpic.palette);
if (vconf->windowsize)
while (ioctl(vconf->dev, VIDIOCSWIN, &vconf->win) )
v_error(vconf, LOG_ERR, "Problem setting window size"); // exit
set_picture_parms(vconf);
}
/* Read image via read() */
if (!vconf->usemmap) {
if (vconf->autobrightness)
v_error(vconf, LOG_INFO, "Forced to use brightness adj. - using read()");
else
v_error(vconf, LOG_INFO, "Could not get mmap-buffer - Falling back to read()");
do {
err_count=0;
if (vconf->autobrightness && vconf->vpic.palette==VIDEO_PALETTE_RGB24) {
v_error(vconf, LOG_INFO, "Doing brightness adjustment");
do {
while (read(vconf->dev, vconf->buffer, size) < size)
v_error(vconf, LOG_ERR, "Error reading from %s", vconf->in);
f = brightness_adj(vconf, &newbright);
if (f) {
vconf->vpic.brightness += (newbright << 8);
if (ioctl(vconf->dev, VIDIOCSPICT, &vconf->vpic)==-1)
v_error(vconf, LOG_WARNING, "Problem setting brightness");
err_count++;
if (err_count>100) {
v_error(vconf, LOG_WARNING, "Brightness not optimal");
break;
}
}
} while (f);
v_error(vconf, LOG_INFO, "Brightness adjusted");
} else {
v_error(vconf, LOG_DEBUG, "Using normal read for image grabbing");
read(vconf->dev, vconf->buffer, size);
}
} while (discard--);
/* We're reading the image via a mmap'd area of the driver */
} else {
v_error(vconf, LOG_DEBUG, "Using mmap for image grabbing");
if (!vconf->openonce)
init_mmap(vconf);
do {
err_count=0;
do {
if (err_count++>100) {
v_error(vconf, LOG_ERR, "Could not grab frame (100 tries)");
break;
}
} while (ioctl(vconf->dev, VIDIOCMCAPTURE, &vconf->vmap) < 0);
err_count=0;
do {
if (err_count++>100) {
v_error(vconf, LOG_ERR, "Could not sync with frame (100 tries)");
break;
}
} while (ioctl(vconf->dev, VIDIOCSYNC, &vconf->vmap.frame) < 0);
vconf->buffer=memcpy(vconf->buffer, vconf->map+vconf->vbuf.offsets[vconf->vmap.frame], size);
if (discard)
v_error(vconf, LOG_DEBUG, "%d frames to discard", discard);
} while (discard--);
if (!vconf->openonce)
free_mmap(vconf);
}
v_error(vconf, LOG_DEBUG, "Image successfully read");
if (!vconf->openonce)
close_device(vconf);
return vconf->buffer;
}
unsigned char *conv_image(struct vconfig *vconf) {
switch (vconf->vpic.palette) {
case VIDEO_PALETTE_RGB24:
vconf->o_buffer=memcpy(vconf->o_buffer, vconf->buffer,
vconf->win.width * vconf->win.height * 3);
v_error(vconf, LOG_DEBUG, "No conversion, we have RGB24");
break;
case VIDEO_PALETTE_RGB32:
v_error(vconf, LOG_INFO, "Got RGB32, converting...");
vconf->o_buffer=conv_rgb32_rgb24(vconf);
break;
case VIDEO_PALETTE_YUV420P:
v_error(vconf, LOG_INFO, "Got YUV420p, converting...");
ccvt_420p_bgr24(vconf->win.width, vconf->win.height, vconf->buffer,
vconf->buffer + (vconf->win.width * vconf->win.height),
vconf->buffer + (vconf->win.width * vconf->win.height)+
(vconf->win.width * vconf->win.height / 4),
vconf->o_buffer);
break;
case VIDEO_PALETTE_YUV420:
v_error(vconf, LOG_INFO, "Got YUV420, converting...");
ccvt_420i_rgb24(vconf->win.width, vconf->win.height, vconf->buffer, vconf->o_buffer);
break;
case VIDEO_PALETTE_YUYV:
case VIDEO_PALETTE_YUV422:
v_error(vconf, LOG_INFO, "Got YUYV, converting...");
ccvt_yuyv_bgr24(vconf->win.width, vconf->win.height, vconf->buffer, vconf->o_buffer);
break;
default:
v_error(vconf, LOG_CRIT, "Should not happen - Unknown input image format");
break;
}
if (vconf->vpic.palette!=VIDEO_PALETTE_RGB24)
v_error(vconf, LOG_DEBUG, "converted to RGB24");
if (vconf->switch_bgr) {
vconf->o_buffer=switch_color(vconf);
v_error(vconf, LOG_DEBUG, "Switched from BGR to RGB - or vice versa");
}
return vconf->o_buffer;
}
/* Main loop */
int main(int argc, char *argv[])
{
struct vconfig *vconf=NULL;
#ifdef DEBUGGING
mtrace();
#endif
vconf=v_init(vconf, argc, argv);
if (vconf->loop && (!vconf->nofork) )
daemonize(vconf, basename(argv[0]));
else
v_error(vconf, LOG_WARNING, "Reading image from %s", vconf->in);
// now start the loop (if daemon), read image and convert it, if necessary
do {
vconf->buffer=read_image(vconf, img_size(vconf, vconf->vpic.palette));
vconf->o_buffer = conv_image(vconf);
if (vconf->swaprl)
vconf->o_buffer=swap_left_right(vconf->o_buffer, vconf->win.width, vconf->win.height);
if (vconf->swaptb)
vconf->o_buffer=swap_top_bottom(vconf->o_buffer, vconf->win.width, vconf->win.height);
#ifdef LIBTTF
if (vconf->use_ts)
vconf->o_buffer=inserttext(vconf->ttinit, vconf->o_buffer, vconf);
#endif
write_image(vconf);
vconf->err_count=0;
usleep(vconf->loop);
// We got a signal, we do have to...
switch (signal_terminate) {
case 0:
// No signal received
break;
case SIGTERM:
// We got sigkill, cleanup (for daemon mode) and exit
signal_terminate=0;
cleanup(vconf);
break;
case SIGHUP:
// We got sighup, re-read the config-file (do NOT parse commandline)
signal_terminate=0;
vconf=v_reinit(vconf);
break;
default:
v_error(vconf, LOG_DEBUG, "Unknown signal received, ignoring.");
break;
}
} while (vconf->loop);
cleanup(vconf);
exit(0);
}
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