ifo_main.c
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上传日期:2007-01-06
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文件大小:4k
- /*
- *
- * 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 <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include <errno.h>
- #include <unistd.h>
- #include <sys/types.h>
- #include <sys/mman.h>
- #include "ifo.h"
- #include "misc.h"
- /**
- *
- */
- int ifoIsVTS (ifo_t *ifo)
- {
- if (!strncmp (ifo->data[ID_MAT], "DVDVIDEO-VTS", 12))
- return 0;
- return -1;
- }
- /**
- *
- */
- int ifoIsVMG (ifo_t *ifo)
- {
- if (!strncmp (ifo->data[ID_MAT], "DVDVIDEO-VMG", 12))
- return 0;
- return -1;
- }
- /**
- *
- */
- int ifoGetVOBStart (ifo_t *ifo)
- {
- return ifo->vob_start;
- }
- #define OFF_PTT get4bytes (ifo->data[ID_MAT] + 0xC8)
- #define OFF_TITLE_PGCI get4bytes (ifo->data[ID_MAT] + 0xCC)
- #define OFF_MENU_PGCI get4bytes (ifo->data[ID_MAT] + 0xD0)
- #define OFF_TMT get4bytes (ifo->data[ID_MAT] + 0xD4)
- #define OFF_MENU_CELL_ADDR get4bytes (ifo->data[ID_MAT] + 0xD8)
- #define OFF_MENU_VOBU_ADDR_MAP get4bytes (ifo->data[ID_MAT] + 0xDC)
- #define OFF_TITLE_CELL_ADDR get4bytes (ifo->data[ID_MAT] + 0xE0)
- #define OFF_TITLE_VOBU_ADDR_MAP get4bytes (ifo->data[ID_MAT] + 0xE4)
- #define OFF_VMG_PTT get4bytes (ifo->data[ID_MAT] + 0xC4)
- #define OFF_VMG_MENU_PGCI get4bytes (ifo->data[ID_MAT] + 0xC8)
- #define OFF_VMG_TMT get4bytes (ifo->data[ID_MAT] + 0xD0)
- /**
- *
- */
- ifo_t *ifoOpen (int fd, __off64_t pos)
- {
- ifo_t *ifo;
- if (!(ifo = (ifo_t *) calloc (sizeof (ifo_t), 1))) {
- fprintf (stderr, "%s/%d: memory squeeze (ifo)n", __FILE__, __LINE__);
- return NULL;
- }
- if (!(ifo->data[ID_MAT] = (char *) calloc (DVD_VIDEO_LB_LEN, 1))) {
- fprintf (stderr, "%s/%d: memory squeeze (data)n", __FILE__, __LINE__);
- return NULL;
- }
- ifo->pos = pos;
- ifo->fd = fd;
- if (ifoReadLB (ifo->fd, ifo->pos, DVD_VIDEO_LB_LEN, ifo->data[ID_MAT]) < 0) {
- fprintf (stderr, "%s/%d: something went wrong when reading file.n", __FILE__, __LINE__);
- return NULL;
- }
- ifo->num_menu_vobs = get4bytes (ifo->data[ID_MAT] + 0xC0);
- ifo->vob_start = get4bytes (ifo->data[ID_MAT] + 0xC4);
- if (!ifoIsVTS (ifo)) {
- ifoReadTBL (ifo, OFF_PTT, ID_PTT);
- ifoReadTBL (ifo, OFF_TITLE_PGCI, ID_TITLE_PGCI);
- ifoReadTBL (ifo, OFF_MENU_PGCI, ID_MENU_PGCI);
- ifoReadTBL (ifo, OFF_TMT, ID_TMT);
- ifoReadTBL (ifo, OFF_MENU_CELL_ADDR, ID_MENU_CELL_ADDR);
- ifoReadTBL (ifo, OFF_MENU_VOBU_ADDR_MAP, ID_MENU_VOBU_ADDR_MAP);
- ifoReadTBL (ifo, OFF_TITLE_CELL_ADDR, ID_TITLE_CELL_ADDR);
- ifoReadTBL (ifo, OFF_TITLE_VOBU_ADDR_MAP, ID_TITLE_VOBU_ADDR_MAP);
- } else if (!ifoIsVMG (ifo)) {
- ifoReadTBL (ifo, OFF_VMG_PTT, ID_PTT);
- // ifoReadTBL (ifo, OFF_TITLE_PGCI, ID_TITLE_PGCI);
- ifoReadTBL (ifo, OFF_VMG_MENU_PGCI, ID_MENU_PGCI);
- ifoReadTBL (ifo, OFF_VMG_TMT, ID_TMT);
- // ifoReadTBL (ifo, OFF_MENU_CELL_ADDR, ID_MENU_CELL_ADDR);
- // ifoReadTBL (ifo, OFF_MENU_VOBU_ADDR_MAP, ID_MENU_VOBU_ADDR_MAP);
- ifoReadTBL (ifo, OFF_TITLE_CELL_ADDR, ID_TITLE_CELL_ADDR);
- ifoReadTBL (ifo, OFF_TITLE_VOBU_ADDR_MAP, ID_TITLE_VOBU_ADDR_MAP);
- // ifo->title_pgci = get4bytes (ifo->data[ID_MAT] + 0xCC);
- // ifo->menu_cell_addr = get4bytes (ifo->data[ID_MAT] + 0xD8);
- // ifo->menu_vobu_addr_map = get4bytes (ifo->data[ID_MAT] + 0xDC);
- }
- return ifo;
- }
- /**
- *
- */
- int ifoClose (ifo_t *ifo)
- {
- // close (ifo->fd);
- free (ifo->data[ID_MAT]);
- free (ifo->data[ID_PTT]);
- free (ifo->data[ID_TITLE_PGCI]);
- free (ifo->data[ID_MENU_PGCI]);
- free (ifo->data[ID_TMT]);
- free (ifo->data[ID_MENU_CELL_ADDR]);
- free (ifo->data[ID_MENU_VOBU_ADDR_MAP]);
- free (ifo->data[ID_TITLE_CELL_ADDR]);
- free (ifo->data[ID_TITLE_VOBU_ADDR_MAP]);
- free (ifo);
- return 0;
- }