mkjpghdr.c

来自「MJPEG Driver 3.0.1」· C语言 代码 · 共 83 行

/*
 * mkjpghdr.c
 *
 * jpg_hdr.dat甫 佬绢 ncplus_jpghdr.h 庆歹 颇老肺 函券茄促.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>


#define DEF_JPEG_HDR_SIZE	607
#define DEF_JPEG_READ_FILE	"jpg_hdr.dat"
#define DEF_JPEG_WRITE_FILE	"ncplus_jpghdr.h"

int main(int argc, char *argv[])
{
	char readfile[256];
	char writefile[256];
	unsigned char *jpg_hdr;
	//char *buf;
	int hdr_size;	/* jpeg header size */
	int fd;		/* file descriptor */
	int i;

	if (argc == 1) {
		/*
		readfile = DEF_JPEG_READ_FILE;
		writefile = DEF_JPEG_WRITE_FILE;
		*/
		strncpy(readfile, DEF_JPEG_READ_FILE, 256);
		strncpy(writefile, DEF_JPEG_WRITE_FILE, 256);
		hdr_size = DEF_JPEG_HDR_SIZE;
	} else if (argc == 4) {
		strncpy(readfile, argv[1], 256);
		strncpy(writefile, argv[2], 256);
		hdr_size = atoi(argv[3]);
	} else {
		printf ("Usage: %s [read file] [write file] [jpeg header size]\n",
				argv[0]);
		exit(1);
	}

	printf("read file name   : %s\n", readfile);
	printf("write file name  : %s\n", writefile);
	printf("jpeg header size : %d\n", hdr_size);

	jpg_hdr = (char *)malloc(hdr_size);
	if (jpg_hdr == NULL) {
		fprintf(stderr, "malloc");
		exit(1);
	}
	memset(jpg_hdr, 0, hdr_size);

	fd = open(readfile, O_RDONLY);
	if (fd < 0) {
		fprintf(stderr, "open");
		exit(1);
	}

	read(fd, jpg_hdr, hdr_size);

	close(fd);

	printf("jpeg_hdr[%d] = {\n", hdr_size);
	for (i = 0; i < hdr_size; i++) {
		printf("0x%02x, ", jpg_hdr[i]);
		if ((i+1)%8 == 0)
			printf("\n");
	}
	printf("\b\b");
	printf("};\n");

	free(jpg_hdr);

	return 0;
}