/* * 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/types.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; }