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-rw-r--r--libdvdread/dvd_udf.c1002
1 files changed, 0 insertions, 1002 deletions
diff --git a/libdvdread/dvd_udf.c b/libdvdread/dvd_udf.c
deleted file mode 100644
index 56682e7405..0000000000
--- a/libdvdread/dvd_udf.c
+++ /dev/null
@@ -1,1002 +0,0 @@
-/*
- * This code is based on dvdudf by:
- * Christian Wolff <scarabaeus@convergence.de>.
- *
- * Modifications by:
- * Billy Biggs <vektor@dumbterm.net>.
- * Björn Englund <d4bjorn@dtek.chalmers.se>.
- *
- * Modified for use with MPlayer, changes contained in libdvdread_changes.diff.
- * detailed changelog at http://svn.mplayerhq.hu/mplayer/trunk/
- * $Id$
- *
- * dvdudf: parse and read the UDF volume information of a DVD Video
- * Copyright (C) 1999 Christian Wolff for convergence integrated media
- * GmbH The author can be reached at scarabaeus@convergence.de, the
- * project's page is at http://linuxtv.org/dvd/
- *
- * 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., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA. Or, point your browser to
- * http://www.gnu.org/copyleft/gpl.html
- */
-
-#include "config.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#ifndef __MINGW32__
-#include <sys/ioctl.h>
-#endif
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <inttypes.h>
-
-#include "dvd_reader.h"
-#include "dvd_udf.h"
-
-/* Private but located in/shared with dvd_reader.c */
-extern int UDFReadBlocksRaw( dvd_reader_t *device, uint32_t lb_number,
- size_t block_count, unsigned char *data,
- int encrypted );
-
-/* It's required to either fail or deliver all the blocks asked for. */
-static int DVDReadLBUDF( dvd_reader_t *device, uint32_t lb_number,
- size_t block_count, unsigned char *data,
- int encrypted )
-{
- int ret;
- size_t count = block_count;
-
- while(count > 0) {
-
- ret = UDFReadBlocksRaw(device, lb_number, count, data, encrypted);
-
- if(ret <= 0) {
- /* One of the reads failed or nothing more to read, too bad.
- * We won't even bother returning the reads that went ok. */
- return ret;
- }
-
- count -= (size_t)ret;
- lb_number += (uint32_t)ret;
- }
-
- return block_count;
-}
-
-
-#ifndef NULL
-#define NULL ((void *)0)
-#endif
-
-struct Partition {
- int valid;
- char VolumeDesc[128];
- uint16_t Flags;
- uint16_t Number;
- char Contents[32];
- uint32_t AccessType;
- uint32_t Start;
- uint32_t Length;
-};
-
-struct AD {
- uint32_t Location;
- uint32_t Length;
- uint8_t Flags;
- uint16_t Partition;
-};
-
-struct extent_ad {
- uint32_t location;
- uint32_t length;
-};
-
-struct avdp_t {
- struct extent_ad mvds;
- struct extent_ad rvds;
-};
-
-struct pvd_t {
- uint8_t VolumeIdentifier[32];
- uint8_t VolumeSetIdentifier[128];
-};
-
-struct lbudf {
- uint32_t lb;
- uint8_t *data;
-};
-
-struct icbmap {
- uint32_t lbn;
- struct AD file;
- uint8_t filetype;
-};
-
-struct udf_cache {
- int avdp_valid;
- struct avdp_t avdp;
- int pvd_valid;
- struct pvd_t pvd;
- int partition_valid;
- struct Partition partition;
- int rooticb_valid;
- struct AD rooticb;
- int lb_num;
- struct lbudf *lbs;
- int map_num;
- struct icbmap *maps;
-};
-
-typedef enum {
- PartitionCache, RootICBCache, LBUDFCache, MapCache, AVDPCache, PVDCache
-} UDFCacheType;
-
-extern void *GetUDFCacheHandle(dvd_reader_t *device);
-extern void SetUDFCacheHandle(dvd_reader_t *device, void *cache);
-
-void FreeUDFCache(void *cache)
-{
- struct udf_cache *c = (struct udf_cache *)cache;
- if(c == NULL) {
- return;
- }
- if(c->lbs) {
- free(c->lbs);
- }
- if(c->maps) {
- free(c->maps);
- }
- free(c);
-}
-
-
-static int GetUDFCache(dvd_reader_t *device, UDFCacheType type,
- uint32_t nr, void *data)
-{
- int n;
- struct udf_cache *c;
-
- if(DVDUDFCacheLevel(device, -1) <= 0) {
- return 0;
- }
-
- c = (struct udf_cache *)GetUDFCacheHandle(device);
-
- if(c == NULL) {
- return 0;
- }
-
- switch(type) {
- case AVDPCache:
- if(c->avdp_valid) {
- *(struct avdp_t *)data = c->avdp;
- return 1;
- }
- break;
- case PVDCache:
- if(c->pvd_valid) {
- *(struct pvd_t *)data = c->pvd;
- return 1;
- }
- break;
- case PartitionCache:
- if(c->partition_valid) {
- *(struct Partition *)data = c->partition;
- return 1;
- }
- break;
- case RootICBCache:
- if(c->rooticb_valid) {
- *(struct AD *)data = c->rooticb;
- return 1;
- }
- break;
- case LBUDFCache:
- for(n = 0; n < c->lb_num; n++) {
- if(c->lbs[n].lb == nr) {
- *(uint8_t **)data = c->lbs[n].data;
- return 1;
- }
- }
- break;
- case MapCache:
- for(n = 0; n < c->map_num; n++) {
- if(c->maps[n].lbn == nr) {
- *(struct icbmap *)data = c->maps[n];
- return 1;
- }
- }
- break;
- default:
- break;
- }
-
- return 0;
-}
-
-static int SetUDFCache(dvd_reader_t *device, UDFCacheType type,
- uint32_t nr, void *data)
-{
- int n;
- struct udf_cache *c;
-
- if(DVDUDFCacheLevel(device, -1) <= 0) {
- return 0;
- }
-
- c = (struct udf_cache *)GetUDFCacheHandle(device);
-
- if(c == NULL) {
- c = calloc(1, sizeof(struct udf_cache));
- // fprintf(stderr, "calloc: %d\n", sizeof(struct udf_cache));
- if(c == NULL) {
- return 0;
- }
- SetUDFCacheHandle(device, c);
- }
-
-
- switch(type) {
- case AVDPCache:
- c->avdp = *(struct avdp_t *)data;
- c->avdp_valid = 1;
- break;
- case PVDCache:
- c->pvd = *(struct pvd_t *)data;
- c->pvd_valid = 1;
- break;
- case PartitionCache:
- c->partition = *(struct Partition *)data;
- c->partition_valid = 1;
- break;
- case RootICBCache:
- c->rooticb = *(struct AD *)data;
- c->rooticb_valid = 1;
- break;
- case LBUDFCache:
- for(n = 0; n < c->lb_num; n++) {
- if(c->lbs[n].lb == nr) {
- /* replace with new data */
- c->lbs[n].data = *(uint8_t **)data;
- c->lbs[n].lb = nr;
- return 1;
- }
- }
- c->lb_num++;
- c->lbs = realloc(c->lbs, c->lb_num * sizeof(struct lbudf));
- /*
- fprintf(stderr, "realloc lb: %d * %d = %d\n",
- c->lb_num, sizeof(struct lbudf),
- c->lb_num * sizeof(struct lbudf));
- */
- if(c->lbs == NULL) {
- c->lb_num = 0;
- return 0;
- }
- c->lbs[n].data = *(uint8_t **)data;
- c->lbs[n].lb = nr;
- break;
- case MapCache:
- for(n = 0; n < c->map_num; n++) {
- if(c->maps[n].lbn == nr) {
- /* replace with new data */
- c->maps[n] = *(struct icbmap *)data;
- c->maps[n].lbn = nr;
- return 1;
- }
- }
- c->map_num++;
- c->maps = realloc(c->maps, c->map_num * sizeof(struct icbmap));
- /*
- fprintf(stderr, "realloc maps: %d * %d = %d\n",
- c->map_num, sizeof(struct icbmap),
- c->map_num * sizeof(struct icbmap));
- */
- if(c->maps == NULL) {
- c->map_num = 0;
- return 0;
- }
- c->maps[n] = *(struct icbmap *)data;
- c->maps[n].lbn = nr;
- break;
- default:
- return 0;
- }
-
- return 1;
-}
-
-
-/* For direct data access, LSB first */
-#define GETN1(p) ((uint8_t)data[p])
-#define GETN2(p) ((uint16_t)data[p] | ((uint16_t)data[(p) + 1] << 8))
-#define GETN3(p) ((uint32_t)data[p] | ((uint32_t)data[(p) + 1] << 8) \
- | ((uint32_t)data[(p) + 2] << 16))
-#define GETN4(p) ((uint32_t)data[p] \
- | ((uint32_t)data[(p) + 1] << 8) \
- | ((uint32_t)data[(p) + 2] << 16) \
- | ((uint32_t)data[(p) + 3] << 24))
-/* This is wrong with regard to endianess */
-#define GETN(p, n, target) memcpy(target, &data[p], n)
-
-static int Unicodedecode( uint8_t *data, int len, char *target )
-{
- int p = 1, i = 0;
-
- if( ( data[ 0 ] == 8 ) || ( data[ 0 ] == 16 ) ) do {
- if( data[ 0 ] == 16 ) p++; /* Ignore MSB of unicode16 */
- if( p < len ) {
- target[ i++ ] = data[ p++ ];
- }
- } while( p < len );
-
- target[ i ] = '\0';
- return 0;
-}
-
-static int UDFDescriptor( uint8_t *data, uint16_t *TagID )
-{
- *TagID = GETN2(0);
- // TODO: check CRC 'n stuff
- return 0;
-}
-
-static int UDFExtentAD( uint8_t *data, uint32_t *Length, uint32_t *Location )
-{
- *Length = GETN4(0);
- *Location = GETN4(4);
- return 0;
-}
-
-static int UDFShortAD( uint8_t *data, struct AD *ad,
- struct Partition *partition )
-{
- ad->Length = GETN4(0);
- ad->Flags = ad->Length >> 30;
- ad->Length &= 0x3FFFFFFF;
- ad->Location = GETN4(4);
- ad->Partition = partition->Number; // use number of current partition
- return 0;
-}
-
-static int UDFLongAD( uint8_t *data, struct AD *ad )
-{
- ad->Length = GETN4(0);
- ad->Flags = ad->Length >> 30;
- ad->Length &= 0x3FFFFFFF;
- ad->Location = GETN4(4);
- ad->Partition = GETN2(8);
- //GETN(10, 6, Use);
- return 0;
-}
-
-static int UDFExtAD( uint8_t *data, struct AD *ad )
-{
- ad->Length = GETN4(0);
- ad->Flags = ad->Length >> 30;
- ad->Length &= 0x3FFFFFFF;
- ad->Location = GETN4(12);
- ad->Partition = GETN2(16);
- //GETN(10, 6, Use);
- return 0;
-}
-
-static int UDFICB( uint8_t *data, uint8_t *FileType, uint16_t *Flags )
-{
- *FileType = GETN1(11);
- *Flags = GETN2(18);
- return 0;
-}
-
-
-static int UDFPartition( uint8_t *data, uint16_t *Flags, uint16_t *Number,
- char *Contents, uint32_t *Start, uint32_t *Length )
-{
- *Flags = GETN2(20);
- *Number = GETN2(22);
- GETN(24, 32, Contents);
- *Start = GETN4(188);
- *Length = GETN4(192);
- return 0;
-}
-
-/**
- * Reads the volume descriptor and checks the parameters. Returns 0 on OK, 1
- * on error.
- */
-static int UDFLogVolume( uint8_t *data, char *VolumeDescriptor )
-{
- uint32_t lbsize, MT_L, N_PM;
- Unicodedecode(&data[84], 128, VolumeDescriptor);
- lbsize = GETN4(212); // should be 2048
- MT_L = GETN4(264); // should be 6
- N_PM = GETN4(268); // should be 1
- if (lbsize != DVD_VIDEO_LB_LEN) return 1;
- return 0;
-}
-
-static int UDFFileEntry( uint8_t *data, uint8_t *FileType,
- struct Partition *partition, struct AD *ad )
-{
- uint16_t flags;
- uint32_t L_EA, L_AD;
- unsigned int p;
-
- UDFICB( &data[ 16 ], FileType, &flags );
-
- /* Init ad for an empty file (i.e. there isn't a AD, L_AD == 0 ) */
- ad->Length = GETN4( 60 ); // Really 8 bytes a 56
- ad->Flags = 0;
- ad->Location = 0; // what should we put here?
- ad->Partition = partition->Number; // use number of current partition
-
- L_EA = GETN4( 168 );
- L_AD = GETN4( 172 );
- p = 176 + L_EA;
- while( p < 176 + L_EA + L_AD ) {
- switch( flags & 0x0007 ) {
- case 0: UDFShortAD( &data[ p ], ad, partition ); p += 8; break;
- case 1: UDFLongAD( &data[ p ], ad ); p += 16; break;
- case 2: UDFExtAD( &data[ p ], ad ); p += 20; break;
- case 3:
- switch( L_AD ) {
- case 8: UDFShortAD( &data[ p ], ad, partition ); break;
- case 16: UDFLongAD( &data[ p ], ad ); break;
- case 20: UDFExtAD( &data[ p ], ad ); break;
- }
- p += L_AD;
- break;
- default:
- p += L_AD; break;
- }
- }
- return 0;
-}
-
-static int UDFFileIdentifier( uint8_t *data, uint8_t *FileCharacteristics,
- char *FileName, struct AD *FileICB )
-{
- uint8_t L_FI;
- uint16_t L_IU;
-
- *FileCharacteristics = GETN1(18);
- L_FI = GETN1(19);
- UDFLongAD(&data[20], FileICB);
- L_IU = GETN2(36);
- if (L_FI) Unicodedecode(&data[38 + L_IU], L_FI, FileName);
- else FileName[0] = '\0';
- return 4 * ((38 + L_FI + L_IU + 3) / 4);
-}
-
-/**
- * Maps ICB to FileAD
- * ICB: Location of ICB of directory to scan
- * FileType: Type of the file
- * File: Location of file the ICB is pointing to
- * return 1 on success, 0 on error;
- */
-static int UDFMapICB( dvd_reader_t *device, struct AD ICB, uint8_t *FileType,
- struct Partition *partition, struct AD *File )
-{
- uint8_t LogBlock[DVD_VIDEO_LB_LEN];
- uint32_t lbnum;
- uint16_t TagID;
- struct icbmap tmpmap;
-
- lbnum = partition->Start + ICB.Location;
- tmpmap.lbn = lbnum;
- if(GetUDFCache(device, MapCache, lbnum, &tmpmap)) {
- *FileType = tmpmap.filetype;
- *File = tmpmap.file;
- return 1;
- }
-
- do {
- if( DVDReadLBUDF( device, lbnum++, 1, LogBlock, 0 ) <= 0 ) {
- TagID = 0;
- } else {
- UDFDescriptor( LogBlock, &TagID );
- }
-
- if( TagID == 261 ) {
- UDFFileEntry( LogBlock, FileType, partition, File );
- tmpmap.file = *File;
- tmpmap.filetype = *FileType;
- SetUDFCache(device, MapCache, tmpmap.lbn, &tmpmap);
- return 1;
- };
- } 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;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-23 16:22:31 +0000