mirror of
https://github.com/mpv-player/mpv
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8cf4397274
subdirectory of libdvdread. This will also allow getting rid of some local modifications. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@20997 b3059339-0415-0410-9bf9-f77b7e298cf2
1003 lines
25 KiB
C
1003 lines
25 KiB
C
/*
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* This code is based on dvdudf by:
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* Christian Wolff <scarabaeus@convergence.de>.
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*
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* Modifications by:
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* Billy Biggs <vektor@dumbterm.net>.
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* Björn Englund <d4bjorn@dtek.chalmers.se>.
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*
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* Modified for use with MPlayer, changes contained in libdvdread_changes.diff.
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* detailed changelog at http://svn.mplayerhq.hu/mplayer/trunk/
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* $Id$
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*
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* dvdudf: parse and read the UDF volume information of a DVD Video
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* Copyright (C) 1999 Christian Wolff for convergence integrated media
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* GmbH The author can be reached at scarabaeus@convergence.de, the
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* project's page is at http://linuxtv.org/dvd/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA. Or, point your browser to
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef __MINGW32__
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#include <sys/ioctl.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <inttypes.h>
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#include "dvd_reader.h"
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#include "dvd_udf.h"
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/* Private but located in/shared with dvd_reader.c */
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extern int UDFReadBlocksRaw( dvd_reader_t *device, uint32_t lb_number,
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size_t block_count, unsigned char *data,
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int encrypted );
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/* It's required to either fail or deliver all the blocks asked for. */
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static int DVDReadLBUDF( dvd_reader_t *device, uint32_t lb_number,
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size_t block_count, unsigned char *data,
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int encrypted )
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{
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int ret;
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size_t count = block_count;
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while(count > 0) {
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ret = UDFReadBlocksRaw(device, lb_number, count, data, encrypted);
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if(ret <= 0) {
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/* One of the reads failed or nothing more to read, too bad.
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* We won't even bother returning the reads that went ok. */
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return ret;
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}
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count -= (size_t)ret;
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lb_number += (uint32_t)ret;
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}
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return block_count;
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}
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#ifndef NULL
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#define NULL ((void *)0)
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#endif
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struct Partition {
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int valid;
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char VolumeDesc[128];
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uint16_t Flags;
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uint16_t Number;
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char Contents[32];
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uint32_t AccessType;
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uint32_t Start;
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uint32_t Length;
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};
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struct AD {
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uint32_t Location;
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uint32_t Length;
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uint8_t Flags;
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uint16_t Partition;
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};
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struct extent_ad {
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uint32_t location;
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uint32_t length;
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};
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struct avdp_t {
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struct extent_ad mvds;
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struct extent_ad rvds;
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};
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struct pvd_t {
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uint8_t VolumeIdentifier[32];
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uint8_t VolumeSetIdentifier[128];
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};
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struct lbudf {
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uint32_t lb;
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uint8_t *data;
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};
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struct icbmap {
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uint32_t lbn;
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struct AD file;
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uint8_t filetype;
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};
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struct udf_cache {
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int avdp_valid;
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struct avdp_t avdp;
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int pvd_valid;
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struct pvd_t pvd;
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int partition_valid;
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struct Partition partition;
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int rooticb_valid;
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struct AD rooticb;
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int lb_num;
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struct lbudf *lbs;
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int map_num;
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struct icbmap *maps;
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};
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typedef enum {
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PartitionCache, RootICBCache, LBUDFCache, MapCache, AVDPCache, PVDCache
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} UDFCacheType;
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extern void *GetUDFCacheHandle(dvd_reader_t *device);
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extern void SetUDFCacheHandle(dvd_reader_t *device, void *cache);
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void FreeUDFCache(void *cache)
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{
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struct udf_cache *c = (struct udf_cache *)cache;
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if(c == NULL) {
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return;
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}
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if(c->lbs) {
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free(c->lbs);
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}
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if(c->maps) {
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free(c->maps);
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}
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free(c);
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}
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static int GetUDFCache(dvd_reader_t *device, UDFCacheType type,
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uint32_t nr, void *data)
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{
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int n;
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struct udf_cache *c;
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if(DVDUDFCacheLevel(device, -1) <= 0) {
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return 0;
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}
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c = (struct udf_cache *)GetUDFCacheHandle(device);
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if(c == NULL) {
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return 0;
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}
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switch(type) {
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case AVDPCache:
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if(c->avdp_valid) {
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*(struct avdp_t *)data = c->avdp;
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return 1;
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}
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break;
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case PVDCache:
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if(c->pvd_valid) {
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*(struct pvd_t *)data = c->pvd;
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return 1;
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}
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break;
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case PartitionCache:
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if(c->partition_valid) {
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*(struct Partition *)data = c->partition;
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return 1;
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}
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break;
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case RootICBCache:
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if(c->rooticb_valid) {
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*(struct AD *)data = c->rooticb;
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return 1;
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}
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break;
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case LBUDFCache:
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for(n = 0; n < c->lb_num; n++) {
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if(c->lbs[n].lb == nr) {
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*(uint8_t **)data = c->lbs[n].data;
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return 1;
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}
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}
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break;
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case MapCache:
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for(n = 0; n < c->map_num; n++) {
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if(c->maps[n].lbn == nr) {
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*(struct icbmap *)data = c->maps[n];
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return 1;
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}
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}
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break;
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default:
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break;
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}
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return 0;
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}
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static int SetUDFCache(dvd_reader_t *device, UDFCacheType type,
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uint32_t nr, void *data)
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{
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int n;
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struct udf_cache *c;
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if(DVDUDFCacheLevel(device, -1) <= 0) {
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return 0;
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}
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c = (struct udf_cache *)GetUDFCacheHandle(device);
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if(c == NULL) {
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c = calloc(1, sizeof(struct udf_cache));
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// fprintf(stderr, "calloc: %d\n", sizeof(struct udf_cache));
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if(c == NULL) {
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return 0;
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}
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SetUDFCacheHandle(device, c);
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}
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switch(type) {
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case AVDPCache:
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c->avdp = *(struct avdp_t *)data;
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c->avdp_valid = 1;
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break;
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case PVDCache:
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c->pvd = *(struct pvd_t *)data;
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c->pvd_valid = 1;
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break;
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case PartitionCache:
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c->partition = *(struct Partition *)data;
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c->partition_valid = 1;
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break;
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case RootICBCache:
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c->rooticb = *(struct AD *)data;
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c->rooticb_valid = 1;
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break;
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case LBUDFCache:
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for(n = 0; n < c->lb_num; n++) {
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if(c->lbs[n].lb == nr) {
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/* replace with new data */
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c->lbs[n].data = *(uint8_t **)data;
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c->lbs[n].lb = nr;
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return 1;
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}
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}
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c->lb_num++;
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c->lbs = realloc(c->lbs, c->lb_num * sizeof(struct lbudf));
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/*
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fprintf(stderr, "realloc lb: %d * %d = %d\n",
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c->lb_num, sizeof(struct lbudf),
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c->lb_num * sizeof(struct lbudf));
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*/
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if(c->lbs == NULL) {
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c->lb_num = 0;
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return 0;
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}
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c->lbs[n].data = *(uint8_t **)data;
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c->lbs[n].lb = nr;
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break;
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case MapCache:
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for(n = 0; n < c->map_num; n++) {
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if(c->maps[n].lbn == nr) {
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/* replace with new data */
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c->maps[n] = *(struct icbmap *)data;
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c->maps[n].lbn = nr;
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return 1;
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}
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}
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c->map_num++;
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c->maps = realloc(c->maps, c->map_num * sizeof(struct icbmap));
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/*
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fprintf(stderr, "realloc maps: %d * %d = %d\n",
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c->map_num, sizeof(struct icbmap),
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c->map_num * sizeof(struct icbmap));
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*/
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if(c->maps == NULL) {
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c->map_num = 0;
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return 0;
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}
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c->maps[n] = *(struct icbmap *)data;
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c->maps[n].lbn = nr;
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break;
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default:
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return 0;
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}
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return 1;
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}
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/* For direct data access, LSB first */
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#define GETN1(p) ((uint8_t)data[p])
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#define GETN2(p) ((uint16_t)data[p] | ((uint16_t)data[(p) + 1] << 8))
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#define GETN3(p) ((uint32_t)data[p] | ((uint32_t)data[(p) + 1] << 8) \
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| ((uint32_t)data[(p) + 2] << 16))
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#define GETN4(p) ((uint32_t)data[p] \
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| ((uint32_t)data[(p) + 1] << 8) \
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| ((uint32_t)data[(p) + 2] << 16) \
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| ((uint32_t)data[(p) + 3] << 24))
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/* This is wrong with regard to endianess */
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#define GETN(p, n, target) memcpy(target, &data[p], n)
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static int Unicodedecode( uint8_t *data, int len, char *target )
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{
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int p = 1, i = 0;
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if( ( data[ 0 ] == 8 ) || ( data[ 0 ] == 16 ) ) do {
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if( data[ 0 ] == 16 ) p++; /* Ignore MSB of unicode16 */
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if( p < len ) {
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target[ i++ ] = data[ p++ ];
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}
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} while( p < len );
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target[ i ] = '\0';
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return 0;
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}
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static int UDFDescriptor( uint8_t *data, uint16_t *TagID )
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{
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*TagID = GETN2(0);
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// TODO: check CRC 'n stuff
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return 0;
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}
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static int UDFExtentAD( uint8_t *data, uint32_t *Length, uint32_t *Location )
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{
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*Length = GETN4(0);
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*Location = GETN4(4);
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return 0;
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}
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static int UDFShortAD( uint8_t *data, struct AD *ad,
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struct Partition *partition )
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{
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ad->Length = GETN4(0);
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ad->Flags = ad->Length >> 30;
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ad->Length &= 0x3FFFFFFF;
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ad->Location = GETN4(4);
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ad->Partition = partition->Number; // use number of current partition
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return 0;
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}
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static int UDFLongAD( uint8_t *data, struct AD *ad )
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{
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ad->Length = GETN4(0);
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ad->Flags = ad->Length >> 30;
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ad->Length &= 0x3FFFFFFF;
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ad->Location = GETN4(4);
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ad->Partition = GETN2(8);
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//GETN(10, 6, Use);
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return 0;
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}
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static int UDFExtAD( uint8_t *data, struct AD *ad )
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{
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ad->Length = GETN4(0);
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ad->Flags = ad->Length >> 30;
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ad->Length &= 0x3FFFFFFF;
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ad->Location = GETN4(12);
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ad->Partition = GETN2(16);
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//GETN(10, 6, Use);
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return 0;
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}
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static int UDFICB( uint8_t *data, uint8_t *FileType, uint16_t *Flags )
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{
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*FileType = GETN1(11);
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*Flags = GETN2(18);
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return 0;
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}
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static int UDFPartition( uint8_t *data, uint16_t *Flags, uint16_t *Number,
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char *Contents, uint32_t *Start, uint32_t *Length )
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{
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*Flags = GETN2(20);
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*Number = GETN2(22);
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GETN(24, 32, Contents);
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*Start = GETN4(188);
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*Length = GETN4(192);
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return 0;
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}
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/**
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* Reads the volume descriptor and checks the parameters. Returns 0 on OK, 1
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* on error.
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*/
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static int UDFLogVolume( uint8_t *data, char *VolumeDescriptor )
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{
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uint32_t lbsize, MT_L, N_PM;
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Unicodedecode(&data[84], 128, VolumeDescriptor);
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lbsize = GETN4(212); // should be 2048
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MT_L = GETN4(264); // should be 6
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N_PM = GETN4(268); // should be 1
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if (lbsize != DVD_VIDEO_LB_LEN) return 1;
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return 0;
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}
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static int UDFFileEntry( uint8_t *data, uint8_t *FileType,
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struct Partition *partition, struct AD *ad )
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{
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uint16_t flags;
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uint32_t L_EA, L_AD;
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unsigned int p;
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UDFICB( &data[ 16 ], FileType, &flags );
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/* Init ad for an empty file (i.e. there isn't a AD, L_AD == 0 ) */
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ad->Length = GETN4( 60 ); // Really 8 bytes a 56
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ad->Flags = 0;
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ad->Location = 0; // what should we put here?
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ad->Partition = partition->Number; // use number of current partition
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L_EA = GETN4( 168 );
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L_AD = GETN4( 172 );
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p = 176 + L_EA;
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while( p < 176 + L_EA + L_AD ) {
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switch( flags & 0x0007 ) {
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case 0: UDFShortAD( &data[ p ], ad, partition ); p += 8; break;
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case 1: UDFLongAD( &data[ p ], ad ); p += 16; break;
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case 2: UDFExtAD( &data[ p ], ad ); p += 20; break;
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case 3:
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switch( L_AD ) {
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case 8: UDFShortAD( &data[ p ], ad, partition ); break;
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case 16: UDFLongAD( &data[ p ], ad ); break;
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case 20: UDFExtAD( &data[ p ], ad ); break;
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}
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p += L_AD;
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break;
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default:
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p += L_AD; break;
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}
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}
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return 0;
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}
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static int UDFFileIdentifier( uint8_t *data, uint8_t *FileCharacteristics,
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char *FileName, struct AD *FileICB )
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{
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uint8_t L_FI;
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uint16_t L_IU;
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*FileCharacteristics = GETN1(18);
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L_FI = GETN1(19);
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UDFLongAD(&data[20], FileICB);
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L_IU = GETN2(36);
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if (L_FI) Unicodedecode(&data[38 + L_IU], L_FI, FileName);
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else FileName[0] = '\0';
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return 4 * ((38 + L_FI + L_IU + 3) / 4);
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}
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/**
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* Maps ICB to FileAD
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* ICB: Location of ICB of directory to scan
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* FileType: Type of the file
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* File: Location of file the ICB is pointing to
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* return 1 on success, 0 on error;
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*/
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static int UDFMapICB( dvd_reader_t *device, struct AD ICB, uint8_t *FileType,
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struct Partition *partition, struct AD *File )
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{
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uint8_t LogBlock[DVD_VIDEO_LB_LEN];
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uint32_t lbnum;
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uint16_t TagID;
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struct icbmap tmpmap;
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lbnum = partition->Start + ICB.Location;
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tmpmap.lbn = lbnum;
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if(GetUDFCache(device, MapCache, lbnum, &tmpmap)) {
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*FileType = tmpmap.filetype;
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*File = tmpmap.file;
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return 1;
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}
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do {
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if( DVDReadLBUDF( device, lbnum++, 1, LogBlock, 0 ) <= 0 ) {
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TagID = 0;
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} else {
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UDFDescriptor( LogBlock, &TagID );
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}
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|
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if( TagID == 261 ) {
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UDFFileEntry( LogBlock, FileType, partition, File );
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tmpmap.file = *File;
|
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tmpmap.filetype = *FileType;
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SetUDFCache(device, MapCache, tmpmap.lbn, &tmpmap);
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return 1;
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};
|
|
} while( ( lbnum <= partition->Start + ICB.Location + ( ICB.Length - 1 )
|
|
/ DVD_VIDEO_LB_LEN ) && ( TagID != 261 ) );
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Dir: Location of directory to scan
|
|
* FileName: Name of file to look for
|
|
* FileICB: Location of ICB of the found file
|
|
* return 1 on success, 0 on error;
|
|
*/
|
|
static int UDFScanDir( dvd_reader_t *device, struct AD Dir, char *FileName,
|
|
struct Partition *partition, struct AD *FileICB,
|
|
int cache_file_info)
|
|
{
|
|
char filename[ MAX_UDF_FILE_NAME_LEN ];
|
|
uint8_t directory[ 2 * DVD_VIDEO_LB_LEN ];
|
|
uint32_t lbnum;
|
|
uint16_t TagID;
|
|
uint8_t filechar;
|
|
unsigned int p;
|
|
uint8_t *cached_dir = NULL;
|
|
uint32_t dir_lba;
|
|
struct AD tmpICB;
|
|
int found = 0;
|
|
int in_cache = 0;
|
|
|
|
/* Scan dir for ICB of file */
|
|
lbnum = partition->Start + Dir.Location;
|
|
|
|
if(DVDUDFCacheLevel(device, -1) > 0) {
|
|
/* caching */
|
|
|
|
if(!GetUDFCache(device, LBUDFCache, lbnum, &cached_dir)) {
|
|
dir_lba = (Dir.Length + DVD_VIDEO_LB_LEN) / DVD_VIDEO_LB_LEN;
|
|
if((cached_dir = malloc(dir_lba * DVD_VIDEO_LB_LEN)) == NULL) {
|
|
return 0;
|
|
}
|
|
if( DVDReadLBUDF( device, lbnum, dir_lba, cached_dir, 0) <= 0 ) {
|
|
free(cached_dir);
|
|
cached_dir = NULL;
|
|
}
|
|
/*
|
|
if(cached_dir) {
|
|
fprintf(stderr, "malloc dir: %d\n",
|
|
dir_lba * DVD_VIDEO_LB_LEN);
|
|
}
|
|
*/
|
|
SetUDFCache(device, LBUDFCache, lbnum, &cached_dir);
|
|
} else {
|
|
in_cache = 1;
|
|
}
|
|
|
|
if(cached_dir == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
p = 0;
|
|
|
|
while( p < Dir.Length ) {
|
|
UDFDescriptor( &cached_dir[ p ], &TagID );
|
|
if( TagID == 257 ) {
|
|
p += UDFFileIdentifier( &cached_dir[ p ], &filechar,
|
|
filename, &tmpICB );
|
|
if(cache_file_info && !in_cache) {
|
|
uint8_t tmpFiletype;
|
|
struct AD tmpFile;
|
|
|
|
if( !strcasecmp( FileName, filename ) ) {
|
|
*FileICB = tmpICB;
|
|
found = 1;
|
|
|
|
}
|
|
UDFMapICB(device, tmpICB, &tmpFiletype,
|
|
partition, &tmpFile);
|
|
} else {
|
|
if( !strcasecmp( FileName, filename ) ) {
|
|
*FileICB = tmpICB;
|
|
return 1;
|
|
}
|
|
}
|
|
} else {
|
|
if(cache_file_info && (!in_cache) && found) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
if(cache_file_info && (!in_cache) && found) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if( DVDReadLBUDF( device, lbnum, 2, directory, 0 ) <= 0 ) {
|
|
return 0;
|
|
}
|
|
|
|
p = 0;
|
|
while( p < Dir.Length ) {
|
|
if( p > DVD_VIDEO_LB_LEN ) {
|
|
++lbnum;
|
|
p -= DVD_VIDEO_LB_LEN;
|
|
Dir.Length -= DVD_VIDEO_LB_LEN;
|
|
if( DVDReadLBUDF( device, lbnum, 2, directory, 0 ) <= 0 ) {
|
|
return 0;
|
|
}
|
|
}
|
|
UDFDescriptor( &directory[ p ], &TagID );
|
|
if( TagID == 257 ) {
|
|
p += UDFFileIdentifier( &directory[ p ], &filechar,
|
|
filename, FileICB );
|
|
if( !strcasecmp( FileName, filename ) ) {
|
|
return 1;
|
|
}
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int UDFGetAVDP( dvd_reader_t *device,
|
|
struct avdp_t *avdp)
|
|
{
|
|
uint8_t Anchor[ DVD_VIDEO_LB_LEN ];
|
|
uint32_t lbnum, MVDS_location, MVDS_length;
|
|
uint16_t TagID;
|
|
uint32_t lastsector;
|
|
int terminate;
|
|
struct avdp_t;
|
|
|
|
if(GetUDFCache(device, AVDPCache, 0, avdp)) {
|
|
return 1;
|
|
}
|
|
|
|
/* Find Anchor */
|
|
lastsector = 0;
|
|
lbnum = 256; /* Try #1, prime anchor */
|
|
terminate = 0;
|
|
|
|
for(;;) {
|
|
if( DVDReadLBUDF( device, lbnum, 1, Anchor, 0 ) > 0 ) {
|
|
UDFDescriptor( Anchor, &TagID );
|
|
} else {
|
|
TagID = 0;
|
|
}
|
|
if (TagID != 2) {
|
|
/* Not an anchor */
|
|
if( terminate ) return 0; /* Final try failed */
|
|
|
|
if( lastsector ) {
|
|
|
|
/* We already found the last sector. Try #3, alternative
|
|
* backup anchor. If that fails, don't try again.
|
|
*/
|
|
lbnum = lastsector;
|
|
terminate = 1;
|
|
} else {
|
|
/* TODO: Find last sector of the disc (this is optional). */
|
|
if( lastsector ) {
|
|
/* Try #2, backup anchor */
|
|
lbnum = lastsector - 256;
|
|
} else {
|
|
/* Unable to find last sector */
|
|
return 0;
|
|
}
|
|
}
|
|
} else {
|
|
/* It's an anchor! We can leave */
|
|
break;
|
|
}
|
|
}
|
|
/* Main volume descriptor */
|
|
UDFExtentAD( &Anchor[ 16 ], &MVDS_length, &MVDS_location );
|
|
avdp->mvds.location = MVDS_location;
|
|
avdp->mvds.length = MVDS_length;
|
|
|
|
/* Backup volume descriptor */
|
|
UDFExtentAD( &Anchor[ 24 ], &MVDS_length, &MVDS_location );
|
|
avdp->rvds.location = MVDS_location;
|
|
avdp->rvds.length = MVDS_length;
|
|
|
|
SetUDFCache(device, AVDPCache, 0, avdp);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Looks for partition on the disc. Returns 1 if partition found, 0 on error.
|
|
* partnum: Number of the partition, starting at 0.
|
|
* part: structure to fill with the partition information
|
|
*/
|
|
static int UDFFindPartition( dvd_reader_t *device, int partnum,
|
|
struct Partition *part )
|
|
{
|
|
uint8_t LogBlock[ DVD_VIDEO_LB_LEN ];
|
|
uint32_t lbnum, MVDS_location, MVDS_length;
|
|
uint16_t TagID;
|
|
int i, volvalid;
|
|
struct avdp_t avdp;
|
|
|
|
|
|
if(!UDFGetAVDP(device, &avdp)) {
|
|
return 0;
|
|
}
|
|
|
|
/* Main volume descriptor */
|
|
MVDS_location = avdp.mvds.location;
|
|
MVDS_length = avdp.mvds.length;
|
|
|
|
part->valid = 0;
|
|
volvalid = 0;
|
|
part->VolumeDesc[ 0 ] = '\0';
|
|
i = 1;
|
|
do {
|
|
/* Find Volume Descriptor */
|
|
lbnum = MVDS_location;
|
|
do {
|
|
|
|
if( DVDReadLBUDF( device, lbnum++, 1, LogBlock, 0 ) <= 0 ) {
|
|
TagID = 0;
|
|
} else {
|
|
UDFDescriptor( LogBlock, &TagID );
|
|
}
|
|
|
|
if( ( TagID == 5 ) && ( !part->valid ) ) {
|
|
/* Partition Descriptor */
|
|
UDFPartition( LogBlock, &part->Flags, &part->Number,
|
|
part->Contents, &part->Start, &part->Length );
|
|
part->valid = ( partnum == part->Number );
|
|
} else if( ( TagID == 6 ) && ( !volvalid ) ) {
|
|
/* Logical Volume Descriptor */
|
|
if( UDFLogVolume( LogBlock, part->VolumeDesc ) ) {
|
|
/* TODO: sector size wrong! */
|
|
} else {
|
|
volvalid = 1;
|
|
}
|
|
}
|
|
|
|
} while( ( lbnum <= MVDS_location + ( MVDS_length - 1 )
|
|
/ DVD_VIDEO_LB_LEN ) && ( TagID != 8 )
|
|
&& ( ( !part->valid ) || ( !volvalid ) ) );
|
|
|
|
if( ( !part->valid) || ( !volvalid ) ) {
|
|
/* Backup volume descriptor */
|
|
MVDS_location = avdp.mvds.location;
|
|
MVDS_length = avdp.mvds.length;
|
|
}
|
|
} while( i-- && ( ( !part->valid ) || ( !volvalid ) ) );
|
|
|
|
/* We only care for the partition, not the volume */
|
|
return part->valid;
|
|
}
|
|
|
|
uint32_t UDFFindFile( dvd_reader_t *device, char *filename,
|
|
uint32_t *filesize )
|
|
{
|
|
uint8_t LogBlock[ DVD_VIDEO_LB_LEN ];
|
|
uint32_t lbnum;
|
|
uint16_t TagID;
|
|
struct Partition partition;
|
|
struct AD RootICB, File, ICB;
|
|
char tokenline[ MAX_UDF_FILE_NAME_LEN ];
|
|
char *token;
|
|
uint8_t filetype;
|
|
|
|
*filesize = 0;
|
|
tokenline[0] = '\0';
|
|
strcat( tokenline, filename );
|
|
|
|
|
|
if(!(GetUDFCache(device, PartitionCache, 0, &partition) &&
|
|
GetUDFCache(device, RootICBCache, 0, &RootICB))) {
|
|
/* Find partition, 0 is the standard location for DVD Video.*/
|
|
if( !UDFFindPartition( device, 0, &partition ) ) return 0;
|
|
SetUDFCache(device, PartitionCache, 0, &partition);
|
|
|
|
/* Find root dir ICB */
|
|
lbnum = partition.Start;
|
|
do {
|
|
if( DVDReadLBUDF( device, lbnum++, 1, LogBlock, 0 ) <= 0 ) {
|
|
TagID = 0;
|
|
} else {
|
|
UDFDescriptor( LogBlock, &TagID );
|
|
}
|
|
|
|
/* File Set Descriptor */
|
|
if( TagID == 256 ) { // File Set Descriptor
|
|
UDFLongAD( &LogBlock[ 400 ], &RootICB );
|
|
}
|
|
} while( ( lbnum < partition.Start + partition.Length )
|
|
&& ( TagID != 8 ) && ( TagID != 256 ) );
|
|
|
|
/* Sanity checks. */
|
|
if( TagID != 256 ) return 0;
|
|
if( RootICB.Partition != 0 ) return 0;
|
|
SetUDFCache(device, RootICBCache, 0, &RootICB);
|
|
}
|
|
|
|
/* Find root dir */
|
|
if( !UDFMapICB( device, RootICB, &filetype, &partition, &File ) ) return 0;
|
|
if( filetype != 4 ) return 0; /* Root dir should be dir */
|
|
|
|
{
|
|
int cache_file_info = 0;
|
|
/* Tokenize filepath */
|
|
token = strtok(tokenline, "/");
|
|
|
|
while( token != NULL ) {
|
|
|
|
if( !UDFScanDir( device, File, token, &partition, &ICB,
|
|
cache_file_info)) {
|
|
return 0;
|
|
}
|
|
if( !UDFMapICB( device, ICB, &filetype, &partition, &File ) ) {
|
|
return 0;
|
|
}
|
|
if(!strcmp(token, "VIDEO_TS")) {
|
|
cache_file_info = 1;
|
|
}
|
|
token = strtok( NULL, "/" );
|
|
}
|
|
}
|
|
|
|
/* Sanity check. */
|
|
if( File.Partition != 0 ) return 0;
|
|
|
|
*filesize = File.Length;
|
|
/* Hack to not return partition.Start for empty files. */
|
|
if( !File.Location )
|
|
return 0;
|
|
else
|
|
return partition.Start + File.Location;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Gets a Descriptor .
|
|
* Returns 1 if descriptor found, 0 on error.
|
|
* id, tagid of descriptor
|
|
* bufsize, size of BlockBuf (must be >= DVD_VIDEO_LB_LEN).
|
|
*/
|
|
static int UDFGetDescriptor( dvd_reader_t *device, int id,
|
|
uint8_t *descriptor, int bufsize)
|
|
{
|
|
uint32_t lbnum, MVDS_location, MVDS_length;
|
|
struct avdp_t avdp;
|
|
uint16_t TagID;
|
|
uint32_t lastsector;
|
|
int i, terminate;
|
|
int desc_found = 0;
|
|
/* Find Anchor */
|
|
lastsector = 0;
|
|
lbnum = 256; /* Try #1, prime anchor */
|
|
terminate = 0;
|
|
if(bufsize < DVD_VIDEO_LB_LEN) {
|
|
return 0;
|
|
}
|
|
|
|
if(!UDFGetAVDP(device, &avdp)) {
|
|
return 0;
|
|
}
|
|
|
|
/* Main volume descriptor */
|
|
MVDS_location = avdp.mvds.location;
|
|
MVDS_length = avdp.mvds.length;
|
|
|
|
i = 1;
|
|
do {
|
|
/* Find Descriptor */
|
|
lbnum = MVDS_location;
|
|
do {
|
|
|
|
if( DVDReadLBUDF( device, lbnum++, 1, descriptor, 0 ) <= 0 ) {
|
|
TagID = 0;
|
|
} else {
|
|
UDFDescriptor( descriptor, &TagID );
|
|
}
|
|
|
|
if( (TagID == id) && ( !desc_found ) ) {
|
|
/* Descriptor */
|
|
desc_found = 1;
|
|
}
|
|
} while( ( lbnum <= MVDS_location + ( MVDS_length - 1 )
|
|
/ DVD_VIDEO_LB_LEN ) && ( TagID != 8 )
|
|
&& ( !desc_found) );
|
|
|
|
if( !desc_found ) {
|
|
/* Backup volume descriptor */
|
|
MVDS_location = avdp.rvds.location;
|
|
MVDS_length = avdp.rvds.length;
|
|
}
|
|
} while( i-- && ( !desc_found ) );
|
|
|
|
return desc_found;
|
|
}
|
|
|
|
|
|
static int UDFGetPVD(dvd_reader_t *device, struct pvd_t *pvd)
|
|
{
|
|
uint8_t pvd_buf[DVD_VIDEO_LB_LEN];
|
|
|
|
if(GetUDFCache(device, PVDCache, 0, pvd)) {
|
|
return 1;
|
|
}
|
|
|
|
if(!UDFGetDescriptor( device, 1, pvd_buf, sizeof(pvd_buf))) {
|
|
return 0;
|
|
}
|
|
|
|
memcpy(pvd->VolumeIdentifier, &pvd_buf[24], 32);
|
|
memcpy(pvd->VolumeSetIdentifier, &pvd_buf[72], 128);
|
|
SetUDFCache(device, PVDCache, 0, pvd);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Gets the Volume Identifier string, in 8bit unicode (latin-1)
|
|
* volid, place to put the string
|
|
* volid_size, size of the buffer volid points to
|
|
* returns the size of buffer needed for all data
|
|
*/
|
|
int UDFGetVolumeIdentifier(dvd_reader_t *device, char *volid,
|
|
unsigned int volid_size)
|
|
{
|
|
struct pvd_t pvd;
|
|
unsigned int volid_len;
|
|
|
|
/* get primary volume descriptor */
|
|
if(!UDFGetPVD(device, &pvd)) {
|
|
return 0;
|
|
}
|
|
|
|
volid_len = pvd.VolumeIdentifier[31];
|
|
if(volid_len > 31) {
|
|
/* this field is only 32 bytes something is wrong */
|
|
volid_len = 31;
|
|
}
|
|
if(volid_size > volid_len) {
|
|
volid_size = volid_len;
|
|
}
|
|
Unicodedecode(pvd.VolumeIdentifier, volid_size, volid);
|
|
|
|
return volid_len;
|
|
}
|
|
|
|
/**
|
|
* Gets the Volume Set Identifier, as a 128-byte dstring (not decoded)
|
|
* WARNING This is not a null terminated string
|
|
* volsetid, place to put the data
|
|
* volsetid_size, size of the buffer volsetid points to
|
|
* the buffer should be >=128 bytes to store the whole volumesetidentifier
|
|
* returns the size of the available volsetid information (128)
|
|
* or 0 on error
|
|
*/
|
|
int UDFGetVolumeSetIdentifier(dvd_reader_t *device, uint8_t *volsetid,
|
|
unsigned int volsetid_size)
|
|
{
|
|
struct pvd_t pvd;
|
|
|
|
/* get primary volume descriptor */
|
|
if(!UDFGetPVD(device, &pvd)) {
|
|
return 0;
|
|
}
|
|
|
|
|
|
if(volsetid_size > 128) {
|
|
volsetid_size = 128;
|
|
}
|
|
|
|
memcpy(volsetid, pvd.VolumeSetIdentifier, volsetid_size);
|
|
|
|
return 128;
|
|
}
|