home *** CD-ROM | disk | FTP | other *** search
-
- /*
- *
- * Copyright (C) 1998,1999 Thomas Mirlacher
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 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 General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * The author may be reached as dent@cosy.sbg.ac.at, or
- * Thomas Mirlacher, Jakob-Haringerstr. 2, A-5020 Salzburg,
- * Austria
- *
- *------------------------------------------------------------
- *
- */
-
-
- #include <stdio.h>
- #include <io.h>
-
- #include <sys/types.h>
- //#include <unistd.h>
- #include <stdlib.h>
-
- #include "ifo.h"
- #include "misc.h"
-
- u_int get4bytes (u_char *buf)
- {
- return bswap_32 (*((u_int32_t *)buf));
- }
-
- u_int get2bytes (u_char *buf)
- {
- return bswap_16 (*((u_int16_t *)buf));
- }
-
- int ifoReadTBL (ifo_t *ifo, u_int offset, u_int tbl_id)
- {
- u_char *data;
- u_int len = 0;
-
- if (!offset)
- return -1;
-
- if (!(data = (u_char *) malloc (DVD_VIDEO_LB_LEN))) {
- perror ("malloc");
- return -1;
- }
-
- if (ifoReadLB (ifo->fd, ifo->pos + offset * DVD_VIDEO_LB_LEN, DVD_VIDEO_LB_LEN, data) <= 0) {
- perror ("ifoReadLB");
- return -1;
- }
-
- switch (tbl_id) {
- case ID_TITLE_VOBU_ADDR_MAP:
- case ID_MENU_VOBU_ADDR_MAP:
- len = get4bytes (data) + 1;
- break;
-
- default: {
- ifo_hdr_t *hdr = (ifo_hdr_t *) data;
- len = bswap_32 (hdr->len) + 1;
- }
- }
-
- if (len > DVD_VIDEO_LB_LEN) {
- if (!(data = (u_char *) realloc ((void *) data, len))) {
- perror ("realloc");
- return -1;
- }
-
- ifoReadLB (ifo->fd, ifo->pos + offset * DVD_VIDEO_LB_LEN, len, data);
- }
-
- ifo->data [tbl_id] = data;
-
- { int i;
- u_int32_t *ptr = (u_int32_t *)data;
-
- len/=4;
-
- if (tbl_id == ID_TMT)
- for (i=0; i<len; i++)
- ptr[i] = bswap_32 (ptr[i]);
-
- }
-
- return 0;
- }
-
-
- /**
- *
- */
-
- int ifoReadLB (int fd, __off64_t pos, u_int count, u_char *data)
- {
- if ((pos = _lseeki64 (fd, pos, SEEK_SET)) == -1) {
- fprintf (stderr, "%s/%d: error in lseek (pos: 0x%x)\n",
- __FILE__, __LINE__, pos);
- return -1;
- }
-
- return read (fd, data, count);
- }
-