input_plugin.c

webcam,通过linux实现的摄像头

/*
 ============================================================================
 Name        : input_plugin.c
 Author      : Zhang Yi
 Version     :
 Copyright   : Your copyright notice
 Description : Hello World in C, Ansi-style
 ============================================================================
 */

#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <linux/videodev.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <signal.h>
#include "input_plugin.h"
#include "webserver.h"
void *enc_handle= NULL;
struct vdIn videoIn;
extern globals pglobal;

static int XDIM = 0;
static int YDIM = 0;

int init_videoIn(struct vdIn *vd, char *device, int width, int height,
		int format) {
	vd->width = width;
	vd->height = height;
	vd->formatIn = format;
	vd->buf=(unsigned char*)malloc(width*height*3);
	if ((vd->fd = open(device, O_RDWR)) == -1) {
		perror("ERROR opening camera device");
		return -1;
	}
	if (ioctl(vd->fd, VIDIOCGCAP, &(vd->videocap)) == -1) {
		perror("ERROR opening video_capability");
		return -1;
	}
	printf("Find camera: %s\n", vd->videocap.name);

	if (ioctl(vd ->fd, VIDIOCGPICT, &(vd->picture)) < 0) {
		perror("v4l_get_picture:");
		return -1;
	}
	printf("colour:%d brightness:%d palette:%d depth:%d\n", vd->picture.colour,
			vd->picture.brightness, vd->picture.palette, vd->picture.depth);
	vd->picture.colour = 55535;
	//vd->picture.palette=21;//TODO
	vd->picture.brightness=6000;
	if (ioctl(vd->fd, VIDIOCSPICT, &(vd->picture)) < 0) {
		perror("ERROR setting video_picture");
		return -1;
	}
	if (ioctl(vd->fd, VIDIOCGWIN, &(vd->videowin)) < 0)
		perror("get video_window failed");
	vd->videowin.height = vd->height;
	vd->videowin.width = vd->width;
	if (ioctl(vd->fd, VIDIOCSWIN, &(vd->videowin)) < 0)
		perror("ERROR setting video_window");
	if (ioctl(vd->fd, VIDIOCGWIN, &(vd->videowin)) < 0)
		perror("get video_window failed (after set)");
	printf("VIDIOCSWIN height %d  width %d \n", vd->videowin.height,
			vd->videowin.width);
	return 0;
}

void *input_run() {
	char *device= "/dev/video0";
	int format= VIDEO_PALETTE_JPEG;
	int width=614, height=384;
	memset(&videoIn, 0, sizeof(struct vdIn));
	if (init_videoIn(&videoIn, device, width, height, format) != 0) {
		exit(-1);
	}
	/* xvid init */
	XDIM = width;
	YDIM = height;
	pglobal.buf = (unsigned char *) malloc(XDIM*YDIM*2);
	if (enc_init()) {
		perror("Encore INIT problem");
		exit(-1);
	}
	/* Xvid encode */
	pglobal.stop=0;
	while (!pglobal.stop) {
		int size=read(videoIn.fd, videoIn.buf, XDIM*YDIM*3);
		if (size<0) {
			perror("error read!\n");
			continue;
		}
		pthread_mutex_lock( &pglobal.db);
		pglobal.size =enc_main(videoIn.buf, pglobal.buf);
		printf("enc_main\n");
		if (pglobal.size < 0) {
			printf("erro in encode....\n");
		}
		/* signal fresh_frame */
		pthread_cond_broadcast(&pglobal.db_update);
		pthread_mutex_unlock( &pglobal.db);
	}
	if (enc_handle)
		if (enc_stop())
			perror("Encore RELEASE problem\n");
	exit(0);
}