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/*
* test_vevent.c - Test VIDEO_GET_EVENT and poll(9 for video events
*
* Copyright (C) 2003 convergence GmbH
*
* 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 2.1
* 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 Lesser 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 <sys/ioctl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/poll.h>
#include <fcntl.h>
#include <time.h>
#include <unistd.h>
#include <linux/dvb/video.h>
int videoGetSize(int fd, char *arg)
{
video_size_t size;
if (arg)
return -1;
if (ioctl(fd, VIDEO_GET_SIZE, &size) == -1){
perror("VIDEO_GET_SIZE");
return 0;
}
printf("Video Size: %ux%u ", size.w, size.h);
switch (size.aspect_ratio) {
case VIDEO_FORMAT_4_3:
printf("4:3 (%d)\n", size.aspect_ratio);
break;
case VIDEO_FORMAT_16_9:
printf("16:9 (%d)\n", size.aspect_ratio);
break;
case VIDEO_FORMAT_221_1:
printf("2.21:1 (%d)\n", size.aspect_ratio);
break;
default:
printf("unknown aspect ratio (%d)\n", size.aspect_ratio);
break;
}
return 0;
}
int main(void)
{
int vfd, rc;
char *videodev = "/dev/dvb/adapter0/video0";
struct pollfd pfd[1];
struct video_event event;
if (getenv("VIDEO"))
videodev = getenv("VIDEO");
printf("using video device '%s'\n", videodev);
if((vfd = open(videodev, O_RDONLY | O_NONBLOCK)) < 0) {
perror("open video device");
return 1;
}
videoGetSize(vfd, NULL);
pfd[0].fd = vfd;
pfd[0].events = POLLPRI;
for (;;) {
rc = poll(pfd, 1, -1);
if (rc == -1) {
perror("poll");
return -1;
}
printf("poll events: %#x\n", pfd[0].revents);
if (pfd[0].revents & POLLPRI) {
rc = ioctl(vfd, VIDEO_GET_EVENT, &event);
if (rc == -1) {
perror("VIDEO_GET_EVENT");
return -1;
}
printf("video event %d\n", event.type);
if (event.type == VIDEO_EVENT_SIZE_CHANGED) {
printf(" VIDEO_EVENT_SIZE_CHANGED %ux%u ",
event.u.size.w, event.u.size.h);
switch (event.u.size.aspect_ratio) {
case VIDEO_FORMAT_4_3:
printf("4:3 (%d)\n", event.u.size.aspect_ratio);
break;
case VIDEO_FORMAT_16_9:
printf("16:9 (%d)\n", event.u.size.aspect_ratio);
break;
case VIDEO_FORMAT_221_1:
printf("2.21:1 (%d)\n", event.u.size.aspect_ratio);
break;
default:
printf("unknown aspect ratio (%d)\n",
event.u.size.aspect_ratio);
break;
}
}
}
}
close(vfd);
return 0;
}
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