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/* display single iframes as stillimages
* iframes can be created with the 'convert' tool from imagemagick
* and mpeg2encode from ftp.mpeg.org, and must have a supported
* size, e.g. 702x576:
* $ convert -sample 702x576\! test.jpg test.mpg
*
* or more advanced using netpbm and mpeg2enc (not mpeg2encode) :
* $ cat image.jpg | jpegtopnm | pnmscale -xsize=704 -ysize=576 |\
* ppmntsc --pal | ppmtoy4m -F 25:1 -A 4:3 |\
* mpeg2enc -f 7 -T 90 -F 3 -np -a 2 -o "image.mpg"
*
*/
#include <sys/ioctl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>
#include <unistd.h>
#include <linux/dvb/video.h>
static const char *usage_string = "\n\t"
"usage: %s <still.mpg> [still.mpg ...]\n"
"\n\t"
"to use another videodev than the first, set the environment variable VIDEODEV\n\t"
"e.g.[user@linux]$ export VIDEODEV=\"/dev/dvb/adapter1/video1\".\n\t"
"to display the image <n> seconds, instead of 10, set the variable SSTIME\n\t"
"e.g. [user@linux]$ export SSTIME=\"60\" to display the still for 1 minute.\n\t"
"this options can be set in the same line as the %s command:\n\t"
"e.g. $ SSTIME=25 VIDEODEV=/dev/dvb/adapter1/video1 %s ...\n";
int main (int argc, char **argv)
{
int fd;
int filefd;
struct stat st;
struct video_still_picture sp;
char *videodev = "/dev/dvb/adapter0/video0";
char *env_sstime;
int i = 1;
int tsec = 10;
if (argc < 2) {
fprintf (stderr, usage_string, argv[0],argv[0],argv[0]);
return -1;
}
if (getenv ("VIDEODEV"))
videodev = getenv("VIDEODEV");
if (getenv ("SSTIME")) {
env_sstime = getenv("SSTIME");
tsec = atoi(env_sstime);
}
if ((fd = open(videodev, O_RDWR)) < 0) {
perror(videodev);
return -1;
}
next_pic:
printf("I-frame : '%s'\n", argv[i]);
if ((filefd = open(argv[i], O_RDONLY)) < 0) {
perror(argv[i]);
return -1;
}
fstat(filefd, &st);
sp.iFrame = (char *) malloc (st.st_size);
sp.size = st.st_size;
printf("I-frame size: %d\n", sp.size);
if (!sp.iFrame) {
fprintf (stderr, "No memory for I-Frame\n");
return -1;
}
printf ("read: %d bytes\n", read(filefd, sp.iFrame, sp.size));
close(filefd);
if ((ioctl(fd, VIDEO_STILLPICTURE, &sp) < 0)) {
perror("ioctl VIDEO_STILLPICTURE");
return -1;
}
free(sp.iFrame);
printf("Display image %d seconds ...\n",tsec);
sleep(tsec);
printf("Done.\n");
if (argc > ++i)
goto next_pic;
return 0;
}
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