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#ifndef DVD_READER_H_INCLUDED
#define DVD_READER_H_INCLUDED
/*
* Copyright (C) 2001, 2002 Billy Biggs <vektor@dumbterm.net>,
* Håkan Hjort <d95hjort@dtek.chalmers.se>
*
* 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
*/
#include <sys/types.h>
/**
* The DVD access interface.
*
* This file contains the functions that form the interface to to
* reading files located on a DVD.
*/
/**
* The length of one Logical Block of a DVD.
*/
#define DVD_VIDEO_LB_LEN 2048
/**
* Maximum length of filenames allowed in UDF.
*/
#define MAX_UDF_FILE_NAME_LEN 2048
#ifdef __cplusplus
extern "C" {
#endif
/**
* Opaque type that is used as a handle for one instance of an opened DVD.
*/
typedef struct dvd_reader_s dvd_reader_t;
/**
* Opaque type for a file read handle, much like a normal fd or FILE *.
*/
typedef struct dvd_file_s dvd_file_t;
/**
* Opens a block device of a DVD-ROM file, or an image file, or a directory
* name for a mounted DVD or HD copy of a DVD.
*
* If the given file is a block device, or is the mountpoint for a block
* device, then that device is used for CSS authentication using libdvdcss.
* If no device is available, then no CSS authentication is performed,
* and we hope that the image is decrypted.
*
* If the path given is a directory, then the files in that directory may be
* in any one of these formats:
*
* path/VIDEO_TS/VTS_01_1.VOB
* path/video_ts/vts_01_1.vob
* path/VTS_01_1.VOB
* path/vts_01_1.vob
*
* @param path Specifies the the device, file or directory to be used.
* @return If successful a a read handle is returned. Otherwise 0 is returned.
*
* dvd = DVDOpen(path);
*/
dvd_reader_t *DVDOpen( const char * );
/**
* Closes and cleans up the DVD reader object.
*
* You must close all open files before calling this function.
*
* @param dvd A read handle that should be closed.
*
* DVDClose(dvd);
*/
void DVDClose( dvd_reader_t * );
/**
*
*/
typedef enum {
DVD_READ_INFO_FILE, /**< VIDEO_TS.IFO or VTS_XX_0.IFO (title) */
DVD_READ_INFO_BACKUP_FILE, /**< VIDEO_TS.BUP or VTS_XX_0.BUP (title) */
DVD_READ_MENU_VOBS, /**< VIDEO_TS.VOB or VTS_XX_0.VOB (title) */
DVD_READ_TITLE_VOBS /**< VTS_XX_[1-9].VOB (title). All files in
the title set are opened and read as a
single file. */
} dvd_read_domain_t;
/**
* Opens a file on the DVD given the title number and domain.
*
* If the title number is 0, the video manager information is opened
* (VIDEO_TS.[IFO,BUP,VOB]). Returns a file structure which may be
* used for reads, or 0 if the file was not found.
*
* @param dvd A dvd read handle.
* @param titlenum Which Video Title Set should be used, VIDEO_TS is 0.
* @param domain Which domain.
* @return If successful a a file read handle is returned, otherwise 0.
*
* dvd_file = DVDOpenFile(dvd, titlenum, domain); */
dvd_file_t *DVDOpenFile( dvd_reader_t *, int, dvd_read_domain_t );
/**
* Closes a file and frees the associated structure.
*
* @param dvd_file The file read handle to be closed.
*
* DVDCloseFile(dvd_file);
*/
void DVDCloseFile( dvd_file_t * );
/**
* Reads block_count number of blocks from the file at the given block offset.
* Returns number of blocks read on success, -1 on error. This call is only
* for reading VOB data, and should not be used when reading the IFO files.
* When reading from an encrypted drive, blocks are decrypted using libdvdcss
* where required.
*
* @param dvd_file A file read handle.
* @param offset Block offset from the start of the file to start reading at.
* @param block_count Number of block to read.
* @param data Pointer to a buffer to write the data into.
* @return Returns number of blocks read on success, -1 on error.
*
* blocks_read = DVDReadBlocks(dvd_file, offset, block_count, data);
*/
ssize_t DVDReadBlocks( dvd_file_t *, int, size_t, unsigned char * );
/**
* Seek to the given position in the file. Returns the resulting position in
* bytes from the beginning of the file. The seek position is only used for
* byte reads from the file, the block read call always reads from the given
* offset.
*
* @param dvd_file A file read handle.
* @param seek_offset Byte offset from the start of the file to seek to.
* @return The resulting position in bytes from the beginning of the file.
*
* offset_set = DVDFileSeek(dvd_file, seek_offset);
*/
int DVDFileSeek( dvd_file_t *, int );
/**
* Reads the given number of bytes from the file. This call can only be used
* on the information files, and may not be used for reading from a VOB. This
* reads from and increments the currrent seek position for the file.
*
* @param dvd_file A file read handle.
* @param data Pointer to a buffer to write the data into.
* @param bytes Number of bytes to read.
* @return Returns number of bytes read on success, -1 on error.
*
* bytes_read = DVDReadBytes(dvd_file, data, bytes);
*/
ssize_t DVDReadBytes( dvd_file_t *, void *, size_t );
/**
* Returns the file size in blocks.
*
* @param dvd_file A file read handle.
* @return The size of the file in blocks, -1 on error.
*
* blocks = DVDFileSize(dvd_file);
*/
ssize_t DVDFileSize( dvd_file_t * );
#ifdef __cplusplus
};
#endif
#endif /* DVD_READER_H_INCLUDED */
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