/* $Id: cdio_private.h,v 1.2 2004/04/11 12:20:31 miguelfreitas Exp $ Copyright (C) 2003, 2004 Rocky Bernstein 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 */ /* Internal routines for CD I/O drivers. */ #ifndef __CDIO_PRIVATE_H__ #define __CDIO_PRIVATE_H__ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ /* Opaque type */ typedef struct _CdioDataSource CdioDataSource; typedef struct { /*! Eject media in CD drive. If successful, as a side effect we also free obj. Return 0 if success and 1 for failure. */ int (*eject_media) (void *env); /*! Release and free resources associated with cd. */ void (*free) (void *env); /*! Return the value associated with the key "arg". */ const char * (*get_arg) (void *env, const char key[]); /*! Return an array of device names. if CdIo is NULL (we haven't initialized a specific device driver), then find a suitable device driver. NULL is returned if we couldn't return a list of devices. */ char ** (*get_devices) (void); /*! Return a string containing the default CD device if none is specified. */ char * (*get_default_device)(void); /*! Return the media catalog number MCN from the CD or NULL if there is none or we don't have the ability to get it. */ char * (*get_mcn) (void *env); /*! Return the number of of the first track. CDIO_INVALID_TRACK is returned on error. */ track_t (*get_first_track_num) (void *env); /*! Return the number of tracks in the current medium. CDIO_INVALID_TRACK is returned on error. */ track_t (*get_num_tracks) (void *env); /*! Return the starting LBA for track number track_num in obj. Tracks numbers start at 1. The "leadout" track is specified either by using track_num LEADOUT_TRACK or the total tracks+1. CDIO_INVALID_LBA is returned on error. */ lba_t (*get_track_lba) (void *env, track_t track_num); /*! Get format of track. */ track_format_t (*get_track_format) (void *env, track_t track_num); /*! Return true if we have XA data (green, mode2 form1) or XA data (green, mode2 form2). That is track begins: sync - header - subheader 12 4 - 8 FIXME: there's gotta be a better design for this and get_track_format? */ bool (*get_track_green) (void *env, track_t track_num); /*! Return the starting MSF (minutes/secs/frames) for track number track_num in obj. Tracks numbers start at 1. The "leadout" track is specified either by using track_num LEADOUT_TRACK or the total tracks+1. False is returned on error. */ bool (*get_track_msf) (void *env, track_t track_num, msf_t *msf); /*! lseek - reposition read/write file offset Returns (off_t) -1 on error. Similar to libc's lseek() */ off_t (*lseek) (void *env, off_t offset, int whence); /*! Reads into buf the next size bytes. Returns -1 on error. Similar to libc's read() */ ssize_t (*read) (void *env, void *buf, size_t size); /*! Reads a single mode2 sector from cd device into buf starting from lsn. Returns 0 if no error. */ int (*read_audio_sectors) (void *env, void *buf, lsn_t lsn, unsigned int nblocks); /*! Reads a single mode2 sector from cd device into buf starting from lsn. Returns 0 if no error. */ int (*read_mode2_sector) (void *env, void *buf, lsn_t lsn, bool mode2_form2); /*! Reads nblocks of mode2 sectors from cd device into data starting from lsn. Returns 0 if no error. */ int (*read_mode2_sectors) (void *env, void *buf, lsn_t lsn, bool mode2_form2, unsigned int nblocks); /*! Reads a single mode1 sector from cd device into buf starting from lsn. Returns 0 if no error. */ int (*read_mode1_sector) (void *env, void *buf, lsn_t lsn, bool mode1_form2); /*! Reads nblocks of mode1 sectors from cd device into data starting from lsn. Returns 0 if no error. */ int (*read_mode1_sectors) (void *env, void *buf, lsn_t lsn, bool mode1_form2, unsigned int nblocks); /*! Set the arg "key" with "value" in the source device. */ int (*set_arg) (void *env, const char key[], const char value[]); /*! Return the size of the CD in logical block address (LBA) units. */ uint32_t (*stat_size) (void *env); } cdio_funcs; /* Implementation of CdIo type */ struct _CdIo { driver_id_t driver_id; /* Particular driver opened. */ cdio_funcs op; /* driver-specific routines handling implimentatin*/ void *env; /* environment. Passed to routine above. */ }; /*! Things common to private device structures. Even though not all devices may have some of these fields, by listing common ones we facilitate writing generic routines and even cut-and-paste code. */ typedef struct { char *source_name; /* Name used in open. */ bool init; /* True if structure has been initialized */ bool toc_init; /* True TOC read in */ int ioctls_debugged; /* for debugging */ /* Only one of the below is used. The first is for CD-ROM devices and the second for stream reading (bincue, nrg, toc, network). */ int fd; /* File descriptor of device */ CdioDataSource *data_source; } generic_img_private_t; /* This is used in drivers that must keep their own internal position pointer for doing seeks. Stream-based drivers (like bincue, nrg, toc, network) would use this. */ typedef struct { off_t buff_offset; /* buffer offset in disk-image seeks. */ track_t index; /* Current track index in tocent. */ lba_t lba; /* Current LBA */ } internal_position_t; CdIo * cdio_new (void *env, const cdio_funcs *funcs); /* The below structure describes a specific CD Input driver */ typedef struct { driver_id_t id; unsigned int flags; const char *name; const char *describe; bool (*have_driver) (void); CdIo *(*driver_open) (const char *source_name); char *(*get_default_device) (void); bool (*is_device) (const char *source_name); char **(*get_devices) (void); } CdIo_driver_t; /* The below array gives of the drivers that are currently available for on a particular host. */ extern CdIo_driver_t CdIo_driver[CDIO_MAX_DRIVER]; /* The last valid entry of Cdio_driver. -1 means uninitialzed. -2 means some sort of error. */ extern int CdIo_last_driver; /* The below array gives all drivers that can possibly appear. on a particular host. */ extern CdIo_driver_t CdIo_all_drivers[CDIO_MAX_DRIVER+1]; /*! Add/allocate a drive to the end of drives. Use cdio_free_device_list() to free this device_list. */ void cdio_add_device_list(char **device_list[], const char *drive, int *num_drives); /*! Bogus eject media when there is no ejectable media, e.g. a disk image We always return 2. Should we also free resources? */ int cdio_generic_bogus_eject_media (void *env); /*! Release and free resources associated with cd. */ void cdio_generic_free (void *env); /*! Initialize CD device. */ bool cdio_generic_init (void *env); /*! Reads into buf the next size bytes. Returns -1 on error. Is in fact libc's read(). */ off_t cdio_generic_lseek (void *env, off_t offset, int whence); /*! Reads into buf the next size bytes. Returns -1 on error. Is in fact libc's read(). */ ssize_t cdio_generic_read (void *env, void *buf, size_t size); /*! Release and free resources associated with stream or disk image. */ void cdio_generic_stdio_free (void *env); /*! Return true if source_name could be a device containing a CD-ROM on Win32 */ bool cdio_is_device_win32(const char *source_name); /*! Return true if source_name could be a device containing a CD-ROM on most Unix servers with block and character devices. */ bool cdio_is_device_generic(const char *source_name); /*! Like above, but don't give a warning device doesn't exist. */ bool cdio_is_device_quiet_generic(const char *source_name); #ifdef __cplusplus } #endif /* __cplusplus */ #endif /* __CDIO_PRIVATE_H__ */