68 lines
1.3 KiB
C++
68 lines
1.3 KiB
C++
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#include "quickcam.h"
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//linux specific
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#include <sys/ioctl.h>
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#include <linux/videodev.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#define WIDTH 640
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#define HEIGHT 480
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Quickcam::Quickcam( char *device )
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: Camera(WIDTH, HEIGHT),
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bytes(WIDTH*HEIGHT*4)
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{
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fd = open(device, O_RDWR);
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if (fd == -1) {
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fprintf(stderr, "failed to open video device %s: %s\n", device, strerror(errno));
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exit(1);
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}
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/*
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struct video_capability cap;
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if (ioctl(fd, VIDIOCGCAP, &cap) == -1) {
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fprintf(stderr, "(querycap) %s\n", strerror(errno));
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return EXIT_FAILURE;
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}
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*/
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struct video_picture pict;
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doOrDie(ioctl(fd, VIDIOCGPICT, &pict), "getpict");
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pict.palette = VIDEO_PALETTE_RGB32;
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doOrDie(ioctl(fd, VIDIOCSPICT, &pict), "setpict");
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struct video_window win;
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//get window info
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doOrDie(ioctl(fd, VIDIOCGWIN, &win), "getwin");
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win.width = WIDTH;
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win.height = HEIGHT;
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//set window info
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doOrDie(ioctl(fd, VIDIOCSWIN, &win), "error setting window size");
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}
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Quickcam::~Quickcam( void )
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{
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close(fd);
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}
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void Quickcam::doOrDie(int retval, char *message)
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{
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if (retval == -1) {
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fprintf(stderr, "%s: %s\n", message, strerror(errno));
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exit(1);
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}
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}
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void Quickcam::update( void )
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{
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int read_sz = read(fd, pixels->pixels, bytes);
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doOrDie(read_sz, "read failure");
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}
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