libisoburn-0.2.2/libisoburn/burn_wrap.c File Reference

#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>
#include <libburn/libburn.h>
#include <libisofs/libisofs.h>
#include "libisoburn.h"
#include "isoburn.h"

Include dependency graph for burn_wrap.c:

Go to the source code of this file.

Defines
#define	Isoburn_libburn_dot_h_too_olD   1
Functions
int	isoburn_emulate_toc (struct burn_drive *d, int flag)
int	isoburn_initialize (char msg[1024], int flag)
	Overview.
int	isoburn_libisofs_req (int *major, int *minor, int *micro)
	The minimum version of libisofs to be used with this version of libisoburn at runtime.
int	isoburn_libburn_req (int *major, int *minor, int *micro)
	The minimum version of libburn to be used with this version of libisoburn at runtime.
int	isoburn_set_msgs_submit (int(*msgs_submit)(void *handle, int error_code, char msg_text[], int os_errno, char severity[], int flag), void *submit_handle, int submit_flag, int flag)
	Note: Above version numbers are also recorded in configure.ac because libtool wants them as parameters at build time.
int	isoburn_is_intermediate_dvd_rw (struct burn_drive *d, int flag)
static int	isoburn_welcome_media (struct isoburn **o, struct burn_drive *d, int flag)
	Examines the media and sets appropriate emulation if needed.
int	isoburn_drive_aquire (struct burn_drive_info *drive_infos[], char *adr, int flag)
	Aquire a target drive by its filesystem path resp.
int	isoburn_drive_scan_and_grab (struct burn_drive_info *drive_infos[], char *adr, int load)
	Aquire a target drive by its filesystem path resp.
int	isoburn_drive_grab (struct burn_drive *drive, int load)
	Aquire a drive from the burn_drive_info[] array which was obtained by a previous call of burn_drive_scan().
int	isoburn_find_emulator (struct isoburn **pt, struct burn_drive *drive, int flag)
	Retrieve media emulation and eventual isoburn emulator of drive.
enum burn_disc_status	isoburn_disc_get_status (struct burn_drive *drive)
	Inquire the media status.
int	isoburn_disc_erasable (struct burn_drive *d)
	Tells whether the media can be treated by isoburn_disc_erase().
void	isoburn_disc_erase (struct burn_drive *drive, int fast)
	Mark the media as blank.
off_t	isoburn_disc_available_space (struct burn_drive *d, struct burn_write_opts *opts)
	Return the best possible estimation of the currently available capacity of the media.
int	isoburn_disc_get_msc1 (struct burn_drive *d, int *start_lba)
	Obtain the start block number of the most recent session on media.
int	isoburn_disc_track_lba_nwa (struct burn_drive *d, struct burn_write_opts *opts, int trackno, int *lba, int *nwa)
	Use this with trackno==0 to obtain the predicted start block number of the new session.
int	isoburn_get_msc2 (struct isoburn *o, struct burn_write_opts *opts, int *msc2, int flag)
	Obtains the image address offset to be used with image generation.
void	isoburn_disc_write (struct burn_write_opts *opts, struct burn_disc *disc)
	Start writing of the new session.
void	isoburn_drive_release (struct burn_drive *drive, int eject)
	Release an aquired drive.
void	isoburn_finish (void)
	Shutdown all three libraries.
int	isoburn_needs_emulation (struct burn_drive *drive)
	Inquire wether the media needs emulation or would be suitable for generic multi-session via libburn.
int	isoburn_set_start_byte (struct isoburn *o, off_t value, int flag)
	Set the start address for an emulated add-on session.
int	isoburn_get_min_start_byte (struct burn_drive *d, off_t *start_byte, int flag)
	Obtain the size which was attributed to an emulated appendable on actually overwriteable media.
int	isoburn_drive_wrote_well (struct burn_drive *d)
	Inquire whether the most recent write run was successful.
int	isoburn_get_fifo_status (struct burn_drive *d, int *size, int *free_bytes, char **status_text)
	Inquire state and fill parameters of the fifo which is attached to the emerging track.
int	isoburn__sev_to_text (int severity, char **severity_name, int flag)
int	isoburn__text_to_sev (char *severity_name, int *severity_number, int flag)
int	isoburn_report_iso_error (int iso_error_code, char msg_text[], int os_errno, char min_severity[], int flag)
int	isoburn_read_iso_head_parse (struct burn_drive *d, unsigned char *data, int *image_blocks, char *info, int flag)
int	isoburn_read_iso_head (struct burn_drive *d, int lba, int *image_blocks, char *info, int flag)
	Try whether the data at the given address look like a ISO 9660 image header and obtain its alleged size.
int	isoburn_toc_new_arrays (struct isoburn_toc_disc *o, int session_count, int track_count, int flag)
int	isoburn_toc_destroy_arrays (struct isoburn_toc_disc *o, int flag)
struct isoburn_toc_disc *	isoburn_toc_drive_get_disc (struct burn_drive *d)
	Obtain a master handle for the table of content.
int	isoburn_toc_disc_get_sectors (struct isoburn_toc_disc *disc)
	Tell the number of 2048 byte blocks covered by the table of content.
struct isoburn_toc_session **	isoburn_toc_disc_get_sessions (struct isoburn_toc_disc *disc, int *num)
	Get the array of session handles from the table of content.
int	isoburn_toc_session_get_sectors (struct isoburn_toc_session *s)
	Tell the number of 2048 byte blocks covered by a particular session.
int	isoburn_toc_entry_finish (struct burn_toc_entry *entry, int session_no, int track_no, int flag)
void	isoburn_toc_session_get_leadout_entry (struct isoburn_toc_session *s, struct burn_toc_entry *entry)
	Obtain a copy of the entry which describes the end of a particular session.
struct isoburn_toc_track **	isoburn_toc_session_get_tracks (struct isoburn_toc_session *s, int *num)
	Get the array of track handles from a particular session.
void	isoburn_toc_track_get_entry (struct isoburn_toc_track *t, struct burn_toc_entry *entry)
	Obtain a copy of the entry which describes a particular itrack.
void	isoburn_toc_disc_free (struct isoburn_toc_disc *d)
	Release the memory associated with a master handle of media.
int	isoburn_get_track_lba (struct isoburn_toc_track *track, int *lba, int flag)
int	isoburn_drive_set_msgs_submit (struct burn_drive *d, int(*msgs_submit)(void *handle, int error_code, char msg_text[], int os_errno, char severity[], int flag), void *submit_handle, int submit_flag, int flag)
	Attach to a drive an application provided method for immediate delivery of messages.
int	isoburn_set_msc1 (struct burn_drive *d, int adr_mode, char *adr_value, int flag)
	Set up isoburn_disc_get_msc1() to return a fabricated value.
Variables
struct isoburn *	isoburn_list_start
int(*	libisoburn_default_msgs_submit )(void *handle, int error_code, char msg_text[], int os_errno, char severity[], int flag)
void *	libisoburn_default_msgs_submit_handle
int	libisoburn_default_msgs_submit_flag

---

Define Documentation

#define Isoburn_libburn_dot_h_too_olD   1

---

Function Documentation

int isoburn__sev_to_text	(	int	severity,
		char **	severity_name,
		int	flag
	)

Definition at line 894 of file burn_wrap.c.

Referenced by isoburn_report_iso_error().

{
 int ret;
   
 ret= iso_sev_to_text(severity, severity_name);
 if(ret>0)
   return(ret);
 ret= burn_sev_to_text(severity, severity_name, 0);
 return(ret);
}

int isoburn__text_to_sev	(	char *	severity_name,
		int *	severity_number,
		int	flag
	)

Definition at line 907 of file burn_wrap.c.

Referenced by isoburn_report_iso_error().

{
 int ret= 1;

 ret= iso_text_to_sev(severity_name, severity_number);
 if(ret>0)
   return(ret);
 ret= burn_text_to_sev(severity_name, severity_number, 0);
 return(ret);
}

off_t isoburn_disc_available_space	(	struct burn_drive *	d,
		struct burn_write_opts *	o
	)

Return the best possible estimation of the currently available capacity of the media.

This might depend on particular write option settings and on drive state. An eventual start address for emulated multi-session will be subtracted from the capacity estimation given by burn_disc_available_space(). Negative results get defaulted to 0. Wrapper for: burn_disc_available_space()

Since:

0.1.0

Parameters:

	d	The drive to query.
	o	If not NULL: write parameters to be set on drive before query

Returns:

number of most probably available free bytes

Definition at line 539 of file burn_wrap.c.

References isoburn::emulation_mode, isoburn_disc_get_status(), isoburn_find_emulator(), and isoburn::nwa.

{
 int ret;
 struct isoburn *o;
 struct burn_write_opts *eff_opts= NULL, *local_opts= NULL;
 enum burn_disc_status s;
 off_t avail;

 eff_opts= opts;
 ret= isoburn_find_emulator(&o, d, 0);
 if(ret>0 && o!=NULL)
   if(o->emulation_mode!=0) {
     s= isoburn_disc_get_status(d);
     if(s==BURN_DISC_FULL) /* unknown data format in first 64 kB */
       return((off_t) 0);
     local_opts= burn_write_opts_new(d);
     eff_opts= local_opts;
     burn_write_opts_set_start_byte(eff_opts, ((off_t) o->nwa) * (off_t) 2048);
   }
 avail= burn_disc_available_space(d, eff_opts);
 if(local_opts!=NULL)
   burn_write_opts_free(local_opts);
 local_opts= NULL;
 return(avail);
}

int isoburn_disc_erasable

(

struct burn_drive *

d

)

Tells whether the media can be treated by isoburn_disc_erase().

Wrapper for: burn_disc_erasable()

Since:

0.1.0

Parameters:

drive

The drive to inquire.

Returns:

0=not erasable , else erasable

Definition at line 494 of file burn_wrap.c.

References isoburn::emulation_mode, and isoburn_find_emulator().

{
 int ret;
 struct isoburn *o;

 ret= isoburn_find_emulator(&o, d, 0);
 if(ret>0)
   if(o->emulation_mode==1)
     return(1);
 return burn_disc_erasable(d);
}

void isoburn_disc_erase	(	struct burn_drive *	drive,
		int	fast
	)

Mark the media as blank.

With multi-session media this will call burn_disc_erase(). With random access media, an eventual ISO-9660 filesystem will get invalidated by altering its start blocks on media. In case of success, the media is in status BURN_DISC_BLANK afterwards. Wrapper for: burn_disc_erase()

Since:

0.1.0

Parameters:

	drive	The drive with the media to erase.
	fast	1=fast erase, 0=thorough erase With DVD-RW, fast erase yields media incapable of multi-session.

Definition at line 507 of file burn_wrap.c.

References isoburn::emulation_mode, isoburn_disc_get_status(), isoburn_find_emulator(), isoburn_invalidate_iso(), and Libisoburn_target_head_sizE.

{
 int ret;
 struct isoburn *o;
 enum burn_disc_status s;
 char zero_buffer[Libisoburn_target_head_sizE];

 ret= isoburn_find_emulator(&o, drive, 0);
 if(ret>0) {
   if(o->emulation_mode==-1) {
     /* To cause a negative reply with burn_drive_wrote_well() */
     burn_drive_cancel(drive);
     return;
   }
   if(o->emulation_mode>0) {
     s= isoburn_disc_get_status(drive);
     if(s==BURN_DISC_FULL) { /* unknown data format in first 64 kB */
       memset(zero_buffer, 0, Libisoburn_target_head_sizE);
       ret= burn_random_access_write(drive, (off_t) 0, zero_buffer,
                                     (off_t) Libisoburn_target_head_sizE, 1);
     } else {
       ret= isoburn_invalidate_iso(o, 0);
     }
     if(ret<=0)
       burn_drive_cancel(drive); /* mark run as failure */
     return;
   }
 }
 burn_disc_erase(drive, fast);
}

int isoburn_disc_get_msc1	(	struct burn_drive *	d,
		int *	start_lba
	)

Obtain the start block number of the most recent session on media.

In case of random access media this will always be 0. Succesfull return is not a guarantee that there is a ISO-9660 image at all. The call will fail, nevertheless,if isoburn_disc_get_status() returns not BURN_DISC_APPENDABLE. Note: The result of this call may be fabricated by a previous call of isoburn_set_msc1() which can override the rule to load the most recent session. Wrapper for: burn_disc_get_msc1()

Since:

0.1.0

Parameters:

	d	The drive to inquire
	start_lba	Contains on success the start address in 2048 byte blocks

Returns:

<=0 error , 1 = success

Definition at line 567 of file burn_wrap.c.

References isoburn::emulation_mode, isoburn::fabricated_msc1, isoburn_disc_get_status(), isoburn_find_emulator(), and isoburn_msgs_submit().

Referenced by isoburn_read_image().

{
 int ret;
 struct isoburn *o;

#ifdef Hardcoded_cd_rW
 /* <<< A70929 : hardcoded CD-RW with fabricated -msinfo */
 *start_lba= Hardcoded_cd_rw_c1;
 return(1);
#endif

 if(isoburn_disc_get_status(d)!=BURN_DISC_APPENDABLE &&
    isoburn_disc_get_status(d)!=BURN_DISC_FULL) {
   isoburn_msgs_submit(NULL, 0x00060000,
                       "Media contains no recognizable data", 0, "SORRY", 0);
   return(0);
 }
 ret= isoburn_find_emulator(&o, d, 0);
 if(ret<0)
   return(0);
 if(o->fabricated_msc1>=0) {
   *start_lba= o->fabricated_msc1;
   return(1);
 }
 if(ret>0) if(o->emulation_mode>0) {
   *start_lba= 0;
   return(1);
 }
 return(burn_disc_get_msc1(d, start_lba));
}

enum burn_disc_status isoburn_disc_get_status

(

struct burn_drive *

drive

)

Inquire the media status.

Expect the whole spectrum of libburn BURN_DISC_* with multi-session media. Emulated states with random access media are BURN_DISC_BLANK and BURN_DISC_APPENDABLE. Wrapper for: burn_disc_get_status()

Since:

0.1.0

Parameters:

drive

The drive to inquire.

Returns:

The status of the drive, or what kind of disc is in it. Note: BURN_DISC_UNGRABBED indicates wrong API usage

Definition at line 471 of file burn_wrap.c.

References isoburn::emulation_mode, isoburn::fabricated_disc_status, isoburn_find_emulator(), isoburn::nwa, and isoburn::zero_nwa.

Referenced by isoburn_disc_available_space(), isoburn_disc_erase(), isoburn_disc_get_msc1(), isoburn_is_intermediate_dvd_rw(), isoburn_needs_emulation(), isoburn_prepare_disc_aux(), and isoburn_read_image().

{
 int ret;
 struct isoburn *o;

 ret= isoburn_find_emulator(&o, drive, 0);
 if(ret<0)
   return(BURN_DISC_UNSUITABLE);
 if(o!=NULL)
   if(o->fabricated_disc_status!=BURN_DISC_UNREADY)
     return(o->fabricated_disc_status);
 if(ret==0)
   return(burn_disc_get_status(drive));

 /* emulated status */
 if(o->emulation_mode==-1)
   return(BURN_DISC_UNSUITABLE);
 if(o->nwa>o->zero_nwa)
   return(BURN_DISC_APPENDABLE);
 return(BURN_DISC_BLANK);
}

int isoburn_disc_track_lba_nwa	(	struct burn_drive *	d,
		struct burn_write_opts *	o,
		int	trackno,
		int *	lba,
		int *	nwa
	)

Use this with trackno==0 to obtain the predicted start block number of the new session.

The interesting number is returned in parameter nwa. Wrapper for: burn_disc_track_lba_nwa()

Since:

0.1.0

Parameters:

	d	The drive to inquire
	o	If not NULL: write parameters to be set on drive before query
	trackno	Submit 0.
	lba	return value: start lba
	nwa	return value: Next Writeable Address

Returns:

1=nwa is valid , 0=nwa is not valid , -1=error

Definition at line 599 of file burn_wrap.c.

References isoburn::emulation_mode, isoburn_find_emulator(), and isoburn::nwa.

Referenced by isoburn_get_msc2(), and isoburn_prepare_disc_aux().

{
 int ret;
 struct isoburn *o;

#ifdef Hardcoded_cd_rW
 /* <<< A70929 : hardcoded CD-RW with fabricated -msinfo */
 *lba= Hardcoded_cd_rw_c1;
 *nwa= Hardcoded_cd_rw_nwA;
 return(1);
#endif

 *nwa= *lba= 0;
 ret= isoburn_find_emulator(&o, d, 0);
 if(ret<0)
   return(0);
 if(ret>0) if(o->emulation_mode>0) {
   *lba= 0;
   *nwa= o->nwa;
   return(1);
 }
 if(burn_drive_get_drive_role(d) != 1)
   return(1);
 return(burn_disc_track_lba_nwa(d, opts, trackno, lba, nwa));
}

void isoburn_disc_write	(	struct burn_write_opts *	o,
		struct burn_disc *	disc
	)

Start writing of the new session.

This call is asynchrounous. I.e. it returns quite soon and the progress has to be watched by a loop with call burn_drive_get_status() until BURN_DRIVE_IDLE is returned. Wrapper for: burn_disc_write()

Since:

0.1.0

Parameters:

	o	Options which control the burn process. See burnwrite_opts_*() in libburn.h.
	disc	Disc object created either by isoburn_prepare_disc() or by isoburn_prepare_new_image().

Definition at line 645 of file burn_wrap.c.

References isoburn::emulation_mode, isoburn_find_emulator(), isoburn_is_intermediate_dvd_rw(), isoburn_msgs_submit(), isoburn::nwa, isoburn::truncate, and isoburn::wrote_well.

{
 int ret;
 off_t nwa= 0;
 struct isoburn *o;
 struct burn_drive *drive;
 char reasons[BURN_REASONS_LEN],msg[160+BURN_REASONS_LEN];
 char adr[BURN_DRIVE_ADR_LEN];
 enum burn_write_types write_type;
 struct stat stbuf;

 drive= burn_write_opts_get_drive(opts);
 ret= isoburn_find_emulator(&o, drive, 0);
 if(ret<0)
   return;
 if(o!=NULL) {
   o->wrote_well= -1;
   if(o->emulation_mode!=0) {
     burn_write_opts_set_multi(opts, 0);
     if(o->emulation_mode>0 && o->nwa >= 0) {
       nwa= o->nwa;

       /* This caters for unwritten formatted DVD-RW. They need to be written
          sequentially on the first use. Only written areas are random access.
          If the first session is not written to LBA 0, then re-opening of
          formatting and padding is needed. 
          This can be done. But when the track gets closed after padding,
          this lasts a long time. There is a high risk that an app will not
          poll the message queue while waiting for  isoburn_disc_write()  to
          return. The pacifier loop usually happens only afterwards.
          So automatic formatting might cause a nervous clueless user.
       */
       ret= isoburn_is_intermediate_dvd_rw(drive, 0);
       if(ret>0 && nwa>0 && nwa <= o->zero_nwa) {
         /* actually this should not happen since such media get recognized
            by isoburn_welcome_media and o->zero_nwa gets set to 0
         */
         sprintf(msg,
        "DVD-RW insufficiently formatted. (Intermediate State, size unknown)");
         isoburn_msgs_submit(o, 0x00060000, msg, 0, "FAILURE", 0);
         sprintf(msg,
                "It might help to first deformat it and then format it again");
         isoburn_msgs_submit(o, 0x00060000, msg, 0, "HINT", 0);
         burn_drive_cancel(drive); /* mark run as failure */
         return;
       }
       /* end of DVD-RW oriented check */

       burn_write_opts_set_start_byte(opts, nwa * (off_t) 2048);
     }
   }
 }

 write_type= burn_write_opts_auto_write_type(opts, disc, reasons, 0);
 if (write_type == BURN_WRITE_NONE) {
    sprintf(msg, "Failed to find a suitable write mode:\n%s", reasons);
    isoburn_msgs_submit(o, 0x00060000, msg, 0, "FAILURE", 0);
    if(o!=NULL)
      o->wrote_well= 0;
    /* To cause a negative reply with burn_drive_wrote_well() */
    burn_drive_cancel(drive);
    return;
 }

 sprintf(reasons, "%d", (int) write_type);
 sprintf(msg, "Write_type = %s\n",
              (write_type == BURN_WRITE_SAO ? "SAO" :
              (write_type == BURN_WRITE_TAO ? "TAO" : reasons)));
 isoburn_msgs_submit(o, 0x00060000, msg, 0, "DEBUG", 0);

#ifdef Hardcoded_cd_rW
 /* <<< A70929 : hardcoded CD-RW with fabricated -msinfo */
 fprintf(stderr, "Setting write address to LBA %d\n", Hardcoded_cd_rw_nwA);
 burn_write_opts_set_start_byte(opts,
                 ((off_t) Hardcoded_cd_rw_nwA) * (off_t) 2048);
#endif

 if(o->truncate) {
   ret= burn_drive_get_drive_role(drive);
   if(ret==2) {
     ret= burn_drive_d_get_adr(drive, adr);
     if(ret>0) {
       ret= lstat(adr, &stbuf);
       if(ret!=-1)
         if(S_ISREG(stbuf.st_mode))
           truncate(adr, nwa * (off_t) 2048);
     }
   }
 }

 burn_disc_write(opts, disc);
}

int isoburn_drive_aquire	(	struct burn_drive_info *	drive_infos[],
		char *	adr,
		int	flag
	)

Aquire a target drive by its filesystem path resp.

Parameters:

flag

bit0= load bit1= regard overwriteable media as blank bit2= if the drive is a regular disk file: truncate it to the write start address bit3= if the drive reports a -ROM profile then try to read table of content by scanning for ISO image headers. (depending on media type and drive state this might help or it might make the resulting toc even worse)

Definition at line 377 of file burn_wrap.c.

References isoburn::drive, isoburn_destroy(), isoburn_find_emulator(), isoburn_msgs_submit(), isoburn_welcome_media(), and isoburn::truncate.

Referenced by isoburn_drive_scan_and_grab().

{
 int ret, conv_ret, drive_grabbed= 0;
 char libburn_drive_adr[BURN_DRIVE_ADR_LEN];
 struct isoburn *o= NULL;
 char msg[BURN_MSGS_MESSAGE_LEN+4096];

 conv_ret= burn_drive_convert_fs_adr(adr, libburn_drive_adr);
 if(conv_ret<=0) {
   sprintf(msg, "Unsuitable drive address: '%s'\n",adr);
   msg[BURN_MSGS_MESSAGE_LEN-1]= 0;
   isoburn_msgs_submit(NULL, 0x00060000, msg, 0, "FAILURE", 0);
   ret= 0; goto ex;
 }

 ret= burn_drive_scan_and_grab(drive_infos, libburn_drive_adr, flag&1);
 if(ret<=0)
   goto ex;
 drive_grabbed= 1;
 ret= isoburn_welcome_media(&o, (*drive_infos)[0].drive,
                            (flag&8) | !!(flag&2));
 if(ret<=0)
   goto ex;

 if(flag&4) {
   ret= isoburn_find_emulator(&o, (*drive_infos)[0].drive, 0);
   if(ret>0 && o!=NULL)
     o->truncate= 1;
 }

 ret= 1;
ex:
 if(ret<=0) {
   if(drive_grabbed)
     burn_drive_release((*drive_infos)[0].drive, 0);
   isoburn_destroy(&o, 0);
 }
 return(ret);
}

int isoburn_drive_grab	(	struct burn_drive *	drive,
		int	load
	)

Aquire a drive from the burn_drive_info[] array which was obtained by a previous call of burn_drive_scan().

Wrapper for: burn_drive_grab()

Since:

0.1.0

Parameters:

	drive	The drive to grab. E.g. drive_infos[1].drive .
	load	1 attempt to load the disc tray. 0 no attempt, rather failure.

Returns:

1 success, <=0 failure

Definition at line 429 of file burn_wrap.c.

References isoburn_destroy(), and isoburn_welcome_media().

{
 int ret;
 struct isoburn *o= NULL;

 ret= burn_drive_grab(drive, load);
 if(ret<=0)
   goto ex;
 ret= isoburn_welcome_media(&o, drive, 0);
 if(ret<=0)
   goto ex;
 
 ret= 1;
ex:
 if(ret<=0)
   isoburn_destroy(&o,0);
 return(ret);
}

void isoburn_drive_release	(	struct burn_drive *	drive,
		int	eject
	)

Release an aquired drive.

Wrapper for: burn_drive_release()

Since:

0.1.0

Parameters:

	drive	The drive to be released
	eject	1= eject media from drive , 0= do not eject

Definition at line 739 of file burn_wrap.c.

References isoburn_destroy(), and isoburn_find_emulator().

{
 int ret;
 struct isoburn *o;

 ret= isoburn_find_emulator(&o, drive, 0);
 if(ret<0)
   return;
 if(o!=NULL) {
   isoburn_destroy(&o, 0);
 }
 burn_drive_release(drive, eject);
}

int isoburn_drive_scan_and_grab	(	struct burn_drive_info *	drive_infos[],
		char *	adr,
		int	load
	)

Aquire a target drive by its filesystem path resp.

libburn persistent address. Wrapper for: burn_drive_scan_and_grab()

Since:

0.1.0

Parameters:

	drive_infos	On success returns a one element array with the drive (cdrom/burner). Thus use with driveno 0 only. On failure the array has no valid elements at all. The returned array should be freed via burn_drive_info_free() when the drive is no longer needed.
	adr	The persistent address of the desired drive.
	load	1 attempt to load the disc tray. 0 no attempt,rather failure.

Returns:

1 = success , 0 = drive not found , <0 = other error

Definition at line 419 of file burn_wrap.c.

References isoburn_drive_aquire().

{
 int ret;

 ret= isoburn_drive_aquire(drive_infos, adr, !!load);
 return(ret);
}

int isoburn_drive_set_msgs_submit	(	struct burn_drive *	d,
		int(*)(void *handle, int error_code, char msg_text[], int os_errno, char severity[], int flag)	msgs_submit,
		void *	submit_handle,
		int	submit_flag,
		int	flag
	)

Attach to a drive an application provided method for immediate delivery of messages.

If no method is set or if the method is set to NULL then libisoburn delivers messages of the drive through the global msgs_submit() method set by isoburn_set_msgs_submiti() or by the message queue of libburn.

Since:

0.2.0

Parameters:

	d	The drive to which this function, handle and flag shall apply
	msgs_submit	The function call which implements the method
	submit_handle	Handle to be used as first argument of msgs_submit
	submit_flag	Flag to be used as last argument of msgs_submit
	flag	Unused yet, submit 0

Definition at line 1433 of file burn_wrap.c.

References isoburn_find_emulator(), isoburn::msgs_submit, isoburn::msgs_submit_flag, and isoburn::msgs_submit_handle.

{
 struct isoburn *o;
 int ret;

 ret= isoburn_find_emulator(&o, d, 0);
 if(ret<0 || o==NULL)
   return(-1);
 o->msgs_submit= msgs_submit;
 o->msgs_submit_handle= submit_handle;
 o->msgs_submit_flag= submit_flag;
 return(1);
}

int isoburn_drive_wrote_well

(

struct burn_drive *

d

)

Inquire whether the most recent write run was successful.

Wrapper for: burn_drive_wrote_well()

Since:

0.1.0

Parameters:

d

The drive to inquire

Returns:

1=burn seems to have went well, 0=burn failed

Definition at line 830 of file burn_wrap.c.

References isoburn_find_emulator(), and isoburn::wrote_well.

{
 int ret;
 struct isoburn *o;
 
 ret= isoburn_find_emulator(&o, d, 0);
 if(ret<0)
   return(-1);
 if(o!=NULL)
   if(o->wrote_well>=0)
     return(o->wrote_well);
 ret= burn_drive_wrote_well(d);
 return ret;
}

int isoburn_emulate_toc	(	struct burn_drive *	d,
		int	flag
	)

Definition at line 1036 of file burn_wrap.c.

References isoburn::emulation_mode, isoburn_find_emulator(), isoburn_msgs_submit(), isoburn_read_iso_head(), isoburn_toc_entry_destroy(), isoburn_toc_entry_new(), Libisoburn_nwa_alignemenT, Libisoburn_overwriteable_starT, Libisoburn_toc_scan_max_gaP, isoburn_toc_entry::session, isoburn_toc_entry::start_lba, isoburn::toc, isoburn_toc_entry::track_blocks, and isoburn_toc_entry::track_no.

Referenced by isoburn_welcome_media().

{
 int ret, image_size= 0, lba, track_blocks, session_count= 0, read_flag= 0;
 int scan_start= 0, scan_count= 0, probe_minus_16= 0, growisofs_nwa;
 struct isoburn *o;
 struct isoburn_toc_entry *item;
 char msg[160], size_text[80], *sev;
 time_t start_time, last_pacifier, now;
 
 /* is the media emulated multi-session ? */
 ret= isoburn_find_emulator(&o, d, 0);
 if(ret<0)
   return(-1);
 if(o==NULL)
   return(-1);
 if(o->emulation_mode<=0 && !(flag&1))
   return(0);

 start_time= last_pacifier= time(NULL);
 lba= 0;
 if(!(flag&2)) {
   ret= isoburn_read_iso_head(d, lba, &image_size, NULL, 0);
   if(ret<=0)
     {ret= 0; goto failure;}
   lba= Libisoburn_overwriteable_starT;
 }
 while(lba<image_size || (flag&2)) {
   now= time(NULL);
   if(now - last_pacifier >= 5) {
     last_pacifier= now;
     if(scan_count>=10*512)
       sprintf(size_text, "%.f MB", ((double) scan_count) / 512.0);
     else
       sprintf(size_text, "%.f MB", 2 * (double) scan_count);
     sprintf(msg, "Found %d ISO sessions by scanning %s in %.f seconds",
             session_count, size_text, (double) (now - start_time));
     isoburn_msgs_submit(o, 0x00060000, msg, 0, "UPDATE", 0);
   }
   read_flag= 0;
   if(flag&2)
     read_flag|= (1<<15)|((session_count>0)<<14);
   else {

     /* growisofs aligns to 16 rather than 32. Overwriteable TOC emulation
        relies on not accidentially seeing inter-session trash data.
        But one can safely access 16 blocks earlier because a xorriso header
        would have overwritten with the unused 16 blocks at its start.
        If libisoburn alignment would increase, then this would not be
        possible any more.
     */

     if(probe_minus_16)
       read_flag|= (1<<14);
     probe_minus_16= 0;
   }

   ret= isoburn_read_iso_head(d, lba, &track_blocks, NULL, read_flag);
   if(ret<=0) {
     if(session_count>0) {
       if(flag&2) {
         if(ret==0) {
           /* try at next 64 k block (check both 32 k halves) */
           lba+= 32;
           scan_count+= 32;
           if(lba-scan_start <= Libisoburn_toc_scan_max_gaP)
 continue;
         }
 break;
       }
       sprintf(msg,
               "Chain of ISO session headers broken at #%d, LBA %ds",
               session_count+1, lba);
       isoburn_msgs_submit(o, 0x00060000, msg, 0, "WARNING", 0);
     }
     {ret= 0; goto failure;}
   }
   if(ret==2) /* ISO header was found in first half block */
     lba-= 16;
   ret= isoburn_toc_entry_new(&item, o->toc, 0);
   if(ret<=0) {
     isoburn_msgs_submit(o, 0x00060000,
                         "Not enough memory for emulated TOC entry object",
                         0, "FATAL", 0);
     ret= -1; goto failure;
   }
   if(o->toc==NULL)
     o->toc= item;
   session_count++;
   scan_count+= 32;
   item->session= session_count;
   item->track_no= session_count;
   item->start_lba= lba;
   item->track_blocks= track_blocks;
   lba+= track_blocks;

   /* growisofs aligns to 16 rather than 32 */
   growisofs_nwa= lba;
   if(growisofs_nwa % 16)
     growisofs_nwa+= 16 - (growisofs_nwa % 16);
   if(lba % Libisoburn_nwa_alignemenT)
     lba+= Libisoburn_nwa_alignemenT - (lba % Libisoburn_nwa_alignemenT);
   scan_start= lba;
   if(lba - growisofs_nwa == 16)
     probe_minus_16= 1;
 }
 if(last_pacifier != start_time)
   sev= "UPDATE";
 else
   sev= "DEBUG";
 now= time(NULL);
 if(scan_count>=10*512)
   sprintf(size_text, "%.f MB", ((double) scan_count) / 512.0);
 else
   sprintf(size_text, "%.f kB", 2 * (double) scan_count);
 sprintf(msg, "Found %d ISO sessions by scanning %s in %.f seconds",
         session_count, size_text, (double) (now - start_time));
 isoburn_msgs_submit(o, 0x00060000, msg, 0, sev, 0);
 return(1);
failure:;
 isoburn_toc_entry_destroy(&(o->toc), 1);
 return(ret);
}

int isoburn_find_emulator	(	struct isoburn **	pt,
		struct burn_drive *	drive,
		int	flag
	)

Retrieve media emulation and eventual isoburn emulator of drive.

Get an eventual isoburn object which is wrapped around the drive.

Returns:

-1 unsuitable media, 0 generic media, 1 emulated media.

Definition at line 452 of file burn_wrap.c.

References isoburn_find_by_drive(), and isoburn_msgs_submit().

Referenced by isoburn_activate_session(), isoburn_attach_image(), isoburn_cancel_prepared_write(), isoburn_disc_available_space(), isoburn_disc_erasable(), isoburn_disc_erase(), isoburn_disc_get_msc1(), isoburn_disc_get_status(), isoburn_disc_track_lba_nwa(), isoburn_disc_write(), isoburn_drive_aquire(), isoburn_drive_release(), isoburn_drive_set_msgs_submit(), isoburn_drive_wrote_well(), isoburn_emulate_toc(), isoburn_get_attached_image(), isoburn_get_fifo_status(), isoburn_get_min_start_byte(), isoburn_needs_emulation(), isoburn_prepare_blind_grow(), isoburn_prepare_disc_aux(), isoburn_read_image(), isoburn_set_msc1(), isoburn_set_read_pacifier(), and isoburn_toc_drive_get_disc().

{
 int ret;

 ret= isoburn_find_by_drive(pt, drive, 0);
 if(ret<=0)
   return(0);
 if((*pt)->emulation_mode==-1) {
   isoburn_msgs_submit(*pt, 0x00060000,
                    "Unsuitable drive and media state", 0, "FAILURE", 0);
   return(-1);
 }
 if((*pt)->emulation_mode==0)
   return(0);
 return(1);
} 

void isoburn_finish

(

void

)

Shutdown all three libraries.

Wrapper for : iso_finish() and burn_finish().

Since:

0.1.0

Definition at line 754 of file burn_wrap.c.

References isoburn_destroy_all().

{
 isoburn_destroy_all(&isoburn_list_start, 0);
 burn_finish();
 iso_finish();
}

int isoburn_get_fifo_status	(	struct burn_drive *	d,
		int *	size,
		int *	free_bytes,
		char **	status_text
	)

Inquire state and fill parameters of the fifo which is attached to the emerging track.

This should be done in the pacifier loop while isoburn_disc_write() or burn_disc_write() are active. This works only with drives obtained by isoburn_drive_scan_and_grab() or isoburn_drive_grab(). If isoburn_prepare_new_image() was used, then parameter out_drive must have announced the track output drive. Hint: If only burn_write_opts and not burn_drive is known, then the drive can be obtained by burn_write_opts_get_drive().

Since:

0.1.0 d The drive to which the track with the fifo gets burned.

Parameters:

	size	The total size of the fifo
	free_bytes	The current free capacity of the fifo
	status_text	Returns a pointer to a constant text, see below

Returns:

<0 reply invalid, >=0 fifo status code: bit0+1=input status, bit2=consumption status, i.e: 0="standby" : data processing not started yet 1="active" : input and consumption are active 2="ending" : input has ended without error 3="failing" : input had error and ended, 4="unused" : ( consumption has ended before processing start ) 5="abandoned" : consumption has ended prematurely 6="ended" : consumption has ended without input error 7="aborted" : consumption has ended after input error

Definition at line 846 of file burn_wrap.c.

References isoburn::iso_source, and isoburn_find_emulator().

{
 int ret;
 struct isoburn *o;
 size_t hsize= 0, hfree_bytes= 0;

 ret= isoburn_find_emulator(&o, d, 0);
 if(ret<0)
   return(-1);

 if(o==NULL)
   return(-1);
 if(o->iso_source==NULL)
   return(-1);
 ret= iso_ring_buffer_get_status(o->iso_source, &hsize, &hfree_bytes);
 if(hsize > 1024*1024*1024)
   *size= 1024*1024*1024;
 else
   *size= hsize;
 if(hfree_bytes > 1024*1024*1024)
   *free_bytes= 1024*1024*1024;
 else
   *free_bytes= hfree_bytes;
 *status_text= "";
 if(ret==0)
   *status_text= "standby";
 else if(ret==1)
   *status_text= "active";
 else if(ret==2)
   *status_text= "ending";
 else if(ret==3)
   *status_text= "failing";
 else if(ret==4)
   *status_text= "unused";
 else if(ret==5)
   *status_text= "abandoned";
 else if(ret==6)
   *status_text= "ended";
 else if(ret==7)
   *status_text= "aborted";
 return(ret);
}

int isoburn_get_min_start_byte	(	struct burn_drive *	d,
		off_t *	start_byte,
		int	flag
	)

Obtain the size which was attributed to an emulated appendable on actually overwriteable media.

This value is supposed to be <= 2048 * nwa as of isoburn_disc_track_lba_nwa().

Since:

0.1.0

Parameters:

	drive	The drive holding the media.
	start_byte	The reply value counted in bytes, not in sectors.
	flag	Unused yet. Submit 0.

Returns:

1=stat_byte is valid, 0=not an emulated appendable, -1=error

Definition at line 812 of file burn_wrap.c.

References isoburn_find_emulator(), and isoburn::min_start_byte.

{
 int ret;
 struct isoburn *o;

 ret= isoburn_find_emulator(&o, d, 0);
 if(ret<0)
   return(-1);
 if(ret==0) 
   return(0);
 *start_byte= o->min_start_byte;
 if(o->min_start_byte<=0)
   return(0);
 return(1);
}

int isoburn_get_msc2	(	struct isoburn *	o,
		struct burn_write_opts *	opts,
		int *	msc2,
		int	flag
	)

Obtains the image address offset to be used with image generation.

This is either the (emulated) drive nwa or a value set by isoburn_prepare_blind_grow(). In any case this is the address to tell to iso_write_opts_set_ms_block().

Parameters:

	o	The isoburn object to be inquired
	opts	If not NULL: write parameters to be set on drive before query
	msc2	The value to be used with iso_write_opts_set_ms_block()
	flag	unused yet

Returns:

<=0 is failure , >0 success

Definition at line 628 of file burn_wrap.c.

References isoburn::drive, isoburn::fabricated_msc2, isoburn_disc_track_lba_nwa(), and isoburn::nwa.

Referenced by isoburn_prepare_disc_aux().

{
 int ret, lba, nwa;

 if(o->fabricated_msc2>=0)
   *msc2= o->fabricated_msc2;
 else {
   ret= isoburn_disc_track_lba_nwa(o->drive, opts, 0, &lba, &nwa);
   if(ret<=0)
     return(ret);
   *msc2= nwa;
 }
 return(1);
}

int isoburn_get_track_lba	(	struct isoburn_toc_track *	track,
		int *	lba,
		int	flag
	)

Definition at line 1420 of file burn_wrap.c.

References isoburn_toc_track_get_entry().

Referenced by isoburn_set_msc1().

{
 struct burn_toc_entry entry;

 isoburn_toc_track_get_entry(track, &entry);
 if (entry.extensions_valid & 1)
   *lba= entry.start_lba;
 else
   *lba= burn_msf_to_lba(entry.pmin, entry.psec, entry.pframe);
 return(1);
}

int isoburn_initialize	(	char	msg[1024],
		int	flag
	)

Overview.

libisoburn is a frontend for libraries libburn and libisofs which enables creation and expansion of ISO-9660 filesystems on all CD/DVD media supported by libburn. This includes media like DVD+RW, which do not support multi-session management on media level and even plain disk files or block devices.

The price for that is thorough specialization on data files in ISO-9660 filesystem images. So libisoburn is not suitable for audio (CD-DA) or any other CD layout which does not entirely consist of ISO-9660 sessions.

Connector functions

libisofs and libburn do not depend on each other but share some interfaces by which they can cooperate. libisoburn establishes the connection between both modules by creating the necessary interface objects and attaching them to the right places.

Wrapper functions

The priciple of this frontend is that you may use any call of libisofs or libburn unless it has a isoburn_*() wrapper listed in the following function documentation.

E.g. call isoburn_initialize() rather than iso_init(); burn_initialize(); and call isoburn_drive_scan_and_grab() rather than burn_drive_scan_and_grab(). But you may call burn_disc_get_profile() directly if you want to display the media type.

The wrappers will transparently provide the necessary emulations which are appropriate for particular target drives and media states. To learn about them you have to read both API descriptions: the one of the wrapper and the one of the underlying libburn or libisofs call.

Macros BURN_* and functions burn_*() are documented in <libburn/libburn.h> Macros ISO_* and functions iso_*() are documented in <libisofs/libisofs.h>

Usage model

There may be an input drive and an output drive. Either of them may be missing with the consequence that no reading resp. writing is possible. Both drive roles can be fulfilled by the same drive.

Input can be a random access readable libburn drive: optical media, regular files, block devices. Output can be any writeable libburn drive: writeable optical media in burner, writeable file objects (no directories).

libburn demands rw-permissions to drive device file resp. file object.

If the input drive provides a suitable ISO RockRidge image, then its tree may be loaded into memory and can then be manipulated by libisofs API calls. The loading is done by isoburn_read_image() under control of struct isoburn_read_opts which the application obtains from libisoburn and manipulates by the family of isoburn_ropt_set_*() functions.

Writing of result images is controlled by libisofs related parameters in a struct isoburn_imgen_opts which the application obtains from libisoburn and manipulates by the family of isoburn_igopt_set_*() functions.

All multi-session aspects are handled by libisoburn according to these settings. The application does not have to analyze media state and write job parameters. It rather states its desires which libisoburn tries to fulfill, or else will refuse to start the write run.

Setup for Growing, Modifying or Blind Growing

The connector function family offers alternative API calls for performing the setup for several alternative image generation strategies.

Growing: If input and output drive are the same, then isoburn_prepare_disc() is to be used. It will lead to an add-on session on appendable or overwriteable media with existing ISO image. With blank media it will produce a first session.

Modifying: If the output drive is not the input drive, and if it bears blank media or overwriteable without a valid ISO image, then one may produce a consolidated image with old and new data. This will copy file data from an eventual input drive with valid image, add any newly introduced data from the local filesystem, and produce a first session on output media. To prepare for such an image generation run, use isoburn_prepare_new_image().

Blind Growing: This method reads the old image from one drive and writes the add-on session to a different drive. That output drive is nevertheless supposed to finally lead to the same media from where the session was loaded. Usually it will be stdio:/dev/fd/1 (i.e. stdout) being piped into some burn program like with this classic gesture: mkisofs -M $dev -C $msc1,$nwa | cdrecord -waiti dev=$dev Blind growing is prepared by the call isoburn_prepare_blind_grow(). The input drive should be released immediately after this call in order to allow the consumer of the output stream to access that drive for writing.

After either of these setups, some peripheral libburn drive parameter settings like burn_write_opts_set_simulate(), burn_write_opts_set_multi(), burn_drive_set_speed(), burn_write_opts_set_underrun_proof() should be made. Do not set the write mode. It will be chosen by libisoburn so it matches job and media state.

Writing the image

Then one may start image generation and write threads by isoburn_disc_write(). Progress may be watched at the output drive by burn_drive_get_status() and isoburn_get_fifo_status().

At some time, the output drive will be BURN_DRIVE_IDLE indicating that writing has ended. One should inquire isoburn_drive_wrote_well() to learn about overall success.

Finally one must call isoburn_activate_session() which will complete any eventual multi-session emulation. Initialize libisoburn, libisofs and libburn. Wrapper for : iso_init() and burn_initialize()

Since:

0.1.0

Parameters:

	msg	A character array for eventual messages (e.g. with errors)
	flag	Bitfield for control purposes (unused yet, submit 0)

Returns:

1 indicates success, 0 is failure

Definition at line 64 of file burn_wrap.c.

References isoburn_destroy_all(), isoburn_libisofs_req_major, isoburn_libisofs_req_micro, isoburn_libisofs_req_minor, and isoburn_version().

{
 int major, minor, micro, bad_match= 0;


/* First two ugly compile time checks for header version compatibility.
   If everthing matches, then they produce no C code. In case of mismatch,
   intentionally faulty C code will be inserted.
*/

#ifdef iso_lib_header_version_major
/* The minimum requirement of libisoburn towards the libisofs header
   at compile time is defined in libisoburn/libisoburn.h :
     isoburn_libisofs_req_major
     isoburn_libisofs_req_minor
     isoburn_libisofs_req_micro
   It gets compared against the version macros in libisofs/libisofs.h :
     iso_lib_header_version_major
     iso_lib_header_version_minor
     iso_lib_header_version_micro
   If the header is too old then the following code shall cause failure of
   cdrskin compilation rather than to allow production of a program with
   unpredictable bugs or memory corruption.
   The compiler messages supposed to appear in this case are:
      error: 'LIBISOFS_MISCONFIGURATION' undeclared (first use in this function)
      error: 'INTENTIONAL_ABORT_OF_COMPILATION__HEADERFILE_libisofs_dot_h_TOO_OLD__SEE_libisoburn_dot_h_and_burn_wrap_dot_h' undeclared (first use in this function)
      error: 'LIBISOFS_MISCONFIGURATION_' undeclared (first use in this function)
*/
/* The indendation is an advise of man gcc to help old compilers ignoring */
 #if isoburn_libisofs_req_major > iso_lib_header_version_major
 #define Isoburn_libisofs_dot_h_too_olD 1
 #endif
 #if isoburn_libisofs_req_major == iso_lib_header_version_major && isoburn_libisofs_req_minor > iso_lib_header_version_minor
 #define Isoburn_libisofs_dot_h_too_olD 1
 #endif
 #if isoburn_libisofs_req_minor == iso_lib_header_version_minor && isoburn_libisofs_req_micro > iso_lib_header_version_micro
 #define Isoburn_libisofs_dot_h_too_olD 1
 #endif

#ifdef Isoburn_libisofs_dot_h_too_olD
LIBISOFS_MISCONFIGURATION = 0;
INTENTIONAL_ABORT_OF_COMPILATION__HEADERFILE_libisofs_dot_h_TOO_OLD__SEE_libisoburn_dot_h_and_burn_wrap_dot_h = 0;
LIBISOFS_MISCONFIGURATION_ = 0;
#endif

#endif /* iso_lib_header_version_major */

/* The minimum requirement of libisoburn towards the libburn header
   at compile time is defined in libisoburn/libisoburn.h :
     isoburn_libburn_req_major
     isoburn_libburn_req_minor
     isoburn_libburn_req_micro
   It gets compared against the version macros in libburn/libburn.h :
     burn_header_version_major
     burn_header_version_minor
     burn_header_version_micro
   If the header is too old then the following code shall cause failure of
   cdrskin compilation rather than to allow production of a program with
   unpredictable bugs or memory corruption.
   The compiler messages supposed to appear in this case are:
      error: 'LIBBURN_MISCONFIGURATION' undeclared (first use in this function)
      error: 'INTENTIONAL_ABORT_OF_COMPILATION__HEADERFILE_libburn_dot_h_TOO_OLD__SEE_libisoburn_dot_h_and_burn_wrap_dot_h' undeclared (first use in this function)
      error: 'LIBBURN_MISCONFIGURATION_' undeclared (first use in this function)
*/

/* The indendation is an advise of man gcc to help old compilers ignoring */
 #if isoburn_libburn_req_major > burn_header_version_major
 #define Isoburn_libburn_dot_h_too_olD 1
 #endif
 #if isoburn_libburn_req_major == burn_header_version_major && isoburn_libburn_req_minor > burn_header_version_minor
 #define Isoburn_libburn_dot_h_too_olD 1
 #endif
 #if isoburn_libburn_req_minor == burn_header_version_minor && isoburn_libburn_req_micro > burn_header_version_micro
 #define Isoburn_libburn_dot_h_too_olD 1
 #endif

#ifdef Isoburn_libburn_dot_h_too_olD
LIBBURN_MISCONFIGURATION = 0;
INTENTIONAL_ABORT_OF_COMPILATION__HEADERFILE_libburn_dot_h_TOO_OLD__SEE_libisoburn_dot_h_and_burn_wrap_dot_h = 0;
LIBBURN_MISCONFIGURATION_ = 0;
#endif

/* End of ugly compile time tests (scroll up for explanation) */



 msg[0]= 0;
 if(iso_init()<0) {
   sprintf(msg+strlen(msg), "Cannot initialize libisofs\n");
   return(0);
 }
 iso_lib_version(&major, &minor, &micro);
 sprintf(msg+strlen(msg), "libisofs-%d.%d.%d ", major, minor, micro);
#ifdef iso_lib_header_version_major
 if(iso_lib_is_compatible(iso_lib_header_version_major,
                          iso_lib_header_version_minor,
                          iso_lib_header_version_micro)) {
   sprintf(msg+strlen(msg), "ok, ");
 } else {
   sprintf(msg+strlen(msg),"- TOO OLD -, need at least libisofs-%d.%d.%d ,\n",
           iso_lib_header_version_major, iso_lib_header_version_minor,
           iso_lib_header_version_micro);
   bad_match= 1;
 }
#else
 if(iso_lib_is_compatible(isoburn_libisofs_req_major,
                          isoburn_libisofs_req_minor,
                          isoburn_libisofs_req_micro)) {
   sprintf(msg+strlen(msg), "suspicious, ");
 } else {
   sprintf(msg+strlen(msg),"- TOO OLD -, need at least libisofs-%d.%d.%d ,\n",
           isoburn_libisofs_req_major, isoburn_libisofs_req_minor,
           isoburn_libisofs_req_micro);
   bad_match= 1;
 }
#endif /* ! iso_lib_header_version_major */

 if(!burn_initialize()) {
   sprintf(msg+strlen(msg), "Cannot initialize libburn\n");
   return(0);
 }
 burn_version(&major, &minor, &micro);
 sprintf(msg+strlen(msg), "libburn-%d.%d.%d ", major, minor, micro);
 if(major > burn_header_version_major
    || (major == burn_header_version_major
        && (minor > burn_header_version_minor
            || (minor == burn_header_version_minor
                && micro >= burn_header_version_micro)))) {
   sprintf(msg+strlen(msg), "ok, ");
 } else {
   sprintf(msg+strlen(msg), "- TOO OLD -, need at least libburn-%d.%d.%d ,\n",
           burn_header_version_major, burn_header_version_minor,
           burn_header_version_micro);
   bad_match= 1;
 }

 isoburn_version(&major, &minor, &micro);
 sprintf(msg+strlen(msg), "for libisoburn-%d.%d.%d", major, minor, micro);
 if(bad_match)
   return(0);

 isoburn_destroy_all(&isoburn_list_start, 0); /* isoburn_list_start= NULL */
 return(1);
}

int isoburn_is_intermediate_dvd_rw	(	struct burn_drive *	d,
		int	flag
	)

Definition at line 242 of file burn_wrap.c.

References isoburn_disc_get_status().

Referenced by isoburn_disc_write(), and isoburn_welcome_media().

{
 int profile, ret= 0, format_status, num_formats;
 char profile_name[80];
 enum burn_disc_status s;
 off_t format_size= -1;
 unsigned bl_sas;

 s= isoburn_disc_get_status(d);
 ret= burn_disc_get_profile(d, &profile, profile_name);
 if(ret>0 && profile==0x13)
   ret= burn_disc_get_formats(d, &format_status, &format_size,
                              &bl_sas, &num_formats);
 if(ret>0 && profile==0x13 && s==BURN_DISC_BLANK &&
    format_status==BURN_FORMAT_IS_UNKNOWN)
   return(1);
 return(0);
}

int isoburn_libburn_req	(	int *	major,
		int *	minor,
		int *	micro
	)

The minimum version of libburn to be used with this version of libisoburn at runtime.

This is checked already in isoburn_initialize() which will refuse on outdated version. So this call is for information purposes after successful startup only.

Since:

0.1.0

Parameters:

	major	isoburn_libburn_req_major as seen at build time
	minor	as seen at build time
	micro	as seen at build time

Returns:

1 success, <=0 might in future become an error indication

Definition at line 221 of file burn_wrap.c.

{
 *major= burn_header_version_major;
 *minor= burn_header_version_minor;
 *micro= burn_header_version_micro;
 return(1);
}

int isoburn_libisofs_req	(	int *	major,
		int *	minor,
		int *	micro
	)

The minimum version of libisofs to be used with this version of libisoburn at runtime.

This is checked already in isoburn_initialize() which will refuse on outdated version. So this call is for information purposes after successful startup only.

Since:

0.1.0

Parameters:

	major	isoburn_libisofs_req_major as seen at build time
	minor	as seen at build time
	micro	as seen at build time

Returns:

1 success, <=0 might in future become an error indication

Definition at line 211 of file burn_wrap.c.

{
 *major= iso_lib_header_version_major;
 *minor= iso_lib_header_version_minor;
 *micro= iso_lib_header_version_micro;
 return(1);
}

int isoburn_needs_emulation

(

struct burn_drive *

drive

)

Inquire wether the media needs emulation or would be suitable for generic multi-session via libburn.

Since:

0.1.0

Parameters:

d

The drive to inquire

Returns:

0 is generic multi-session 1 is emulated multi-session -1 is not suitable for isoburn

Definition at line 762 of file burn_wrap.c.

References isoburn::emulation_mode, isoburn_disc_get_status(), and isoburn_find_emulator().

{
 int ret;
 struct isoburn *o;
 enum burn_disc_status s;

 s= isoburn_disc_get_status(drive);
 if(s!=BURN_DISC_BLANK && s!=BURN_DISC_APPENDABLE)
   return(-1);
 ret= isoburn_find_emulator(&o, drive, 0);
 if(ret<0)
   return(-1);
 if(ret>0)
   if(o->emulation_mode>0)
     return(1);
 return(0);  
}

int isoburn_read_iso_head	(	struct burn_drive *	d,
		int	lba,
		int *	image_blocks,
		char *	info,
		int	flag
	)

Try whether the data at the given address look like a ISO 9660 image header and obtain its alleged size.

Depending on the info mode one other string of text information can be retrieved too.

Since:

0.1.6

Parameters:

	drive	The drive with the media to inspect
	lba	The block number from where to read
	image_blocks	The number of 2048 bytes blocks
	info	Caller provided memory, enough to take eventual info reply
	flag	bit0-7: info return mode 0= do not return anything in info (do not even touch it) 1= copy volume id to info (info needs 33 bytes) 2=

Since:

0.2.2 : copy 64 kB header to info (needs 65536 bytes) bit13=

0.2.2: do not read head from media but use first 64 kB from info bit14= check both half buffers (not only second) return 2 if found in first block bit15= return-1 on read error

Returns:

>0 seems to be a valid ISO image, 0 format not recognized, <0 error

Definition at line 999 of file burn_wrap.c.

References isoburn_read_iso_head_parse().

Referenced by isoburn_emulate_toc(), isoburn_read_image(), and isoburn_set_msc1().

{
 unsigned char buffer[64*1024];
 int ret, info_mode;
 off_t data_count;

 info_mode= flag&255;
 *image_blocks= 0;
 if(flag&(1<<13)) {
   memcpy(buffer, info, 64*1024);
 } else {
   ret = burn_read_data(d, ((off_t) lba) * (off_t) 2048, (char *) buffer,
                      (off_t) 64*1024, &data_count, 2); /* no error messages */
   if(ret<=0)
     return(-1*!!(flag&(1<<15)));
   if(info_mode==2)
     memcpy(info, buffer, 64*1024);
 }

 if(flag&(1<<14)) {
   ret= isoburn_read_iso_head_parse(d, buffer, image_blocks, info, info_mode);
   if(ret<0)
     return(ret);
   if(ret>0)
     return(2);
 }
 ret= isoburn_read_iso_head_parse(d, buffer+32*1024, image_blocks, info,
                                  info_mode);
 return(ret);
}

int isoburn_read_iso_head_parse	(	struct burn_drive *	d,
		unsigned char *	data,
		int *	image_blocks,
		char *	info,
		int	flag
	)

Definition at line 951 of file burn_wrap.c.

References isoburn_msgs_submit().

Referenced by isoburn_read_iso_head().

{
 int i, info_mode;

 /* is this an ISO image ? */
 if(data[0]!=1)
   return(0);
 if(strncmp((char *) (data+1),"CD001",5)!=0)
   return(0);
 /* believe so */

 *image_blocks= data[80] | (data[81]<<8) | (data[82]<<16) | (data[83]<<24);
 info_mode= flag&255;
 if(info_mode==0) {
   ;
 } else if(info_mode==1) {
   strncpy(info, (char *) (data+40), 32);
   info[32]= 0;
   for(i= strlen(info)-1; i>=0; i--)
     if(info[i]!=' ')
   break;
     else
       info[i]= 0;
 } else if(info_mode==2) {
   ;
 } else {
   isoburn_msgs_submit(NULL, 0x00060000,
               "Program error: Unknown info mode with isoburn_read_iso_head()",
               0, "FATAL", 0);
   return(-1);
 }
 return(1);
}

int isoburn_report_iso_error	(	int	iso_error_code,
		char	msg_text[],
		int	os_errno,
		char	min_severity[],
		int	flag
	)

Definition at line 919 of file burn_wrap.c.

References isoburn__sev_to_text(), and isoburn__text_to_sev().

Referenced by isoburn_new(), isoburn_prepare_disc_aux(), and isoburn_read_image().

{
 int error_code, iso_sev, min_sev, ret;
 char *sev_text_pt, *msg_text_pt= NULL;

 error_code= iso_error_get_code(iso_error_code);
 if(error_code < 0x00030000 || error_code >= 0x00040000)
   error_code= (error_code & 0xffff) | 0x00050000;

 if(iso_error_code<0)
   msg_text_pt= (char *) iso_error_to_msg(iso_error_code);
 if(msg_text_pt==NULL)
   msg_text_pt= msg_text;
 iso_sev= iso_error_get_severity(iso_error_code);
 sev_text_pt= min_severity;
 isoburn__text_to_sev(min_severity, &min_sev, 0);
 if(min_sev < iso_sev) 
   isoburn__sev_to_text(iso_sev, &sev_text_pt, 0);
 ret= iso_msgs_submit(error_code, msg_text_pt, os_errno, sev_text_pt, 0);
 return(ret);
}

int isoburn_set_msc1	(	struct burn_drive *	d,
		int	adr_mode,
		char *	adr_value,
		int	flag
	)

Set up isoburn_disc_get_msc1() to return a fabricated value.

This makes only sense between aquiring the drive and reading the image. After isoburn_read_image() it will confuse the coordination of libisoburn and libisofs. Note: Sessions and tracks are counted beginning with 1, not with 0.

Since:

0.1.6

Parameters:

	drive	The drive where msc1 is to be set
	adr_mode	Determines how to interpret adr_value and to set msc1. If adr_value shall represent a number then decimal ASCII digits are expected. 0= start lba of last session in TOC, ignore adr_value 1= start lba of session number given by adr_value 2= start lba of track given number by adr_value 3= adr_value itself is the lba to be used 4= start lba of last session with volume id given by adr_value adr_value A string describing the value to be eventually used.
	flag	Bitfield for control purposes. bit0=

Since:

0.2.2 with adr_mode 3: adr_value might be 16 blocks too high (e.g. -C stemming from growisofs). Probe for ISO head at adr_value-16 and eventually adjust setting.

Definition at line 1454 of file burn_wrap.c.

References isoburn_toc_disc::disc, isoburn::fabricated_msc1, isoburn_find_emulator(), isoburn_get_track_lba(), isoburn_msgs_submit(), isoburn_read_iso_head(), isoburn_toc_disc_free(), isoburn_toc_disc_get_sessions(), isoburn_toc_drive_get_disc(), and isoburn_toc_session_get_tracks().

{
 int ret, num_sessions, num_tracks, adr_num, i, j, total_tracks;
 int lba, best_lba, size;
 char volid[33], msg[160];
 struct isoburn *o;
 struct isoburn_toc_disc *disc= NULL;
 struct isoburn_toc_session **sessions= NULL;
 struct isoburn_toc_track **tracks= NULL;
 static char mode_names[][20]= {"auto", "session", "track", "lba", "volid"};
 static int max_mode_names= 4;

 ret= isoburn_find_emulator(&o, d, 0);
 if(ret<0)
   return(-1);
 if(o==NULL)
   return(-1);

 adr_num= atoi(adr_value);
 if(adr_mode!=3) {
   disc= isoburn_toc_drive_get_disc(d);
   if(disc==NULL) {
not_found:;
     if(adr_mode<0 || adr_mode>max_mode_names)
       goto unknown_mode;
     sprintf(msg, "Failed to find %s %s", mode_names[adr_mode],
                  strlen(adr_value)<=80 ?  adr_value : "-oversized-string-");
     isoburn_msgs_submit(o, 0x00060000, msg, 0, "FAILURE", 0);
     ret= 0; goto ex;
   }
   sessions= isoburn_toc_disc_get_sessions(disc, &num_sessions);
   if(sessions==NULL || num_sessions<=0)
     goto not_found;
 }
 if(adr_mode==0) {
   /* Set fabricated_msc1 to last session in TOC */
   tracks= isoburn_toc_session_get_tracks(sessions[num_sessions-1],
                                          &num_tracks);
   if(tracks==NULL || num_tracks<=0)
     goto not_found;
   isoburn_get_track_lba(tracks[0], &(o->fabricated_msc1), 0);

 } else if(adr_mode==1) {
   /* Use adr_num as session index (first session is 1, not 0) */
   if(adr_num<1 || adr_num>num_sessions)
     goto not_found;
   tracks= isoburn_toc_session_get_tracks(sessions[adr_num-1], &num_tracks);
   if(tracks==NULL || num_tracks<=0)
     goto not_found;
   isoburn_get_track_lba(tracks[0], &(o->fabricated_msc1), 0);

 } else if(adr_mode==2) {
   /* use adr_num as track index */
   total_tracks= 0;
   for(i=0; i<num_sessions; i++) {
     tracks= isoburn_toc_session_get_tracks(sessions[i], &num_tracks);
     if(tracks==NULL)
   continue;
     for(j= 0; j<num_tracks; j++) {
       total_tracks++;
       if(total_tracks==adr_num) {
         isoburn_get_track_lba(tracks[j], &(o->fabricated_msc1), 0);
         ret= 1; goto ex;
       }
     }
   }
   goto not_found;

 } else if(adr_mode==3) {
   o->fabricated_msc1= adr_num;
   if((flag & 1) && o->fabricated_msc1 >= 16) {
     /* adr_num is possibly 16 blocks too high */
     ret= isoburn_read_iso_head(d, o->fabricated_msc1, &size,volid, 1|(1<<14));
     if(ret==2)
       o->fabricated_msc1-= 16;
   }
 } else if(adr_mode==4) {
   /* search for volume id that is equal to adr_value */
   best_lba= -1;
   for(i=0; i<num_sessions; i++) {
     tracks= isoburn_toc_session_get_tracks(sessions[i], &num_tracks);
     if(tracks==NULL)
   continue;
     for(j= 0; j<num_tracks; j++) {
       isoburn_get_track_lba(tracks[0], &lba, 0);
       ret= isoburn_read_iso_head(d, lba, &size, volid, 1);
       if(ret<=0)
     continue;
       if(strcmp(volid, adr_value)!=0)
     continue;
       best_lba= lba;
     }
   }
   if(best_lba<0)
     goto not_found;
   o->fabricated_msc1= best_lba;

 } else {
unknown_mode:;
   sprintf(msg, "Program error: Unknown msc1 address mode %d", adr_mode);
   isoburn_msgs_submit(o, 0x00060000, msg, 0, "FATAL", 0);
   ret= 0; goto ex;
 }
 ret= 1;
ex:;
 if(disc!=NULL)
   isoburn_toc_disc_free(disc);
 return(ret);
}

int isoburn_set_msgs_submit	(	int(*)(void *handle, int error_code, char msg_text[], int os_errno, char severity[], int flag)	msgs_submit,
		void *	submit_handle,
		int	submit_flag,
		int	flag
	)

Note: Above version numbers are also recorded in configure.ac because libtool wants them as parameters at build time.

For the library compatibility check, ISOBURN_*_VERSION in configure.ac are not decisive. Only the three numbers here do matter. Usage discussion:Some developers of the libburnia project have differing opinions how to ensure the compatibility of libaries and applications.

It is about whether to use at compile time and at runtime the version numbers isoburn_header_version_* provided here. Thomas Schmitt advises to use them. Vreixo Formoso advises to use other means.

At compile time:

Vreixo Formoso advises to leave proper version matching to properly programmed checks in the the application's build system, which will eventually refuse compilation.

Thomas Schmitt advises to use the macros defined here for comparison with the application's requirements of library revisions and to eventually break compilation.

Both advises are combinable. I.e. be master of your build system and have if checks in the source code of your application, nevertheless.

At runtime (via *_is_compatible()):

Vreixo Formoso advises to compare the application's requirements of library revisions with the runtime library. This is to allow runtime libraries which are young enough for the application but too old for the lib*.h files seen at compile time.

Thomas Schmitt advises to compare the header revisions defined here with the runtime library. This is to enforce a strictly monotonous chain of revisions from app to header to library, at the cost of excluding some older libraries.

These two advises are mutually exclusive.

-----------------------------------------------------

For an implementation of the Thomas Schmitt approach, see libisoburn/burn_wrap.c : isoburn_initialize() This connects libisoburn as "application" with libisofs as "library".

The compatible part of Vreixo Formoso's approach is implemented in configure.ac LIBBURN_REQUIRED, LIBISOFS_REQUIRED. In isoburn_initialize() it would rather test by iso_lib_is_compatible(isoburn_libisofs_req_major,... than by iso_lib_is_compatible(iso_lib_header_version_major,... and would leave out the ugly compile time traps. Announce to the library an application provided method for immediate delivery of messages. It is used when no drive is affected directly or if the drive has no own msgs_submit() method attached by isoburn_drive_set_msgs_submit. If no method is preset or if the method is set to NULL then libisoburn delivers its messages through the message queue of libburn.

Parameters:

	msgs_submit	The function call which implements the method
	submit_handle	Handle to be used as first argument of msgs_submit
	submit_flag	Flag to be used as last argument of msgs_submit
	flag	Unused yet, submit 0

Since:

0.2.0

Definition at line 230 of file burn_wrap.c.

References libisoburn_default_msgs_submit, libisoburn_default_msgs_submit_flag, libisoburn_default_msgs_submit_handle, and isoburn::msgs_submit.

{
 libisoburn_default_msgs_submit= msgs_submit;
 libisoburn_default_msgs_submit_handle= submit_handle;
 libisoburn_default_msgs_submit_flag= submit_flag;
 return(1);
}

int isoburn_set_start_byte	(	struct isoburn *	o,
		off_t	value,
		int	flag
	)

Set the start address for an emulated add-on session.

The value will be rounded up to the alignment necessary for the media. The aligned value will be divided by 2048 and then put into o->nwa .

Parameters:

	o	The isoburn object to be programmed.
	value	The start address in bytes
	flag	unused yet

Returns:

<=0 is failure , >0 success

Definition at line 781 of file burn_wrap.c.

References isoburn::drive, isoburn_msgs_submit(), Libisoburn_nwa_alignemenT, isoburn::min_start_byte, and isoburn::nwa.

Referenced by isoburn_start_emulation().

{
 int ret;
 struct burn_drive *drive = o->drive;
 struct burn_multi_caps *caps= NULL;
 
 ret= burn_disc_get_multi_caps(drive, BURN_WRITE_NONE, &caps, 0);
 if(ret<=0)
   goto ex;
 if(!caps->start_adr) {
   isoburn_msgs_submit(o, 0x00060000,
                       "Cannot set start byte address with this type of media",
                       0, "FAILURE", 0);
   {ret= 0; goto ex;}
 }
 o->min_start_byte= value;
 if(value % caps->start_alignment)
   value+= caps->start_alignment - (value % caps->start_alignment);
 o->nwa= value/2048;
 /* If suitable for media alignment, round up to Libisoburn_nwa_alignemenT */
 if((o->nwa % Libisoburn_nwa_alignemenT) &&
     ((Libisoburn_nwa_alignemenT*2048) % caps->start_alignment)==0 )
   o->nwa+= Libisoburn_nwa_alignemenT - (o->nwa % Libisoburn_nwa_alignemenT);
 ret= 1;
ex:
 if(caps!=NULL)
   burn_disc_free_multi_caps(&caps);
 return(ret);
}

int isoburn_toc_destroy_arrays	(	struct isoburn_toc_disc *	o,
		int	flag
	)

Definition at line 1193 of file burn_wrap.c.

References isoburn_toc_disc::session_pointers, isoburn_toc_disc::sessions, isoburn_toc_disc::track_pointers, and isoburn_toc_disc::tracks.

Referenced by isoburn_toc_disc_free(), and isoburn_toc_new_arrays().

{
 if(o->sessions!=NULL)
   free((char *) o->sessions);
 o->sessions= NULL;
 if(o->session_pointers!=NULL)
   free((char *) o->session_pointers);
 o->session_pointers= NULL;
 if(o->tracks!=NULL)
   free((char *) o->tracks);
 o->tracks= NULL;
 if(o->track_pointers!=NULL)
   free((char *) o->track_pointers);
 o->track_pointers= NULL;
 return(1);
}

void isoburn_toc_disc_free

(

struct isoburn_toc_disc *

disc

)

Release the memory associated with a master handle of media.

The handle is invalid afterwards and may not be used any more. Wrapper for: burn_disc_free()

Since:

0.1.6

Parameters:

disc

The master handle of the media

Definition at line 1411 of file burn_wrap.c.

References isoburn_toc_disc::disc, and isoburn_toc_destroy_arrays().

Referenced by isoburn_set_msc1().

{
 if(d->disc!=NULL)
   burn_disc_free(d->disc);
 isoburn_toc_destroy_arrays(d, 0);
 free((char *) d);
}

int isoburn_toc_disc_get_sectors

(

struct isoburn_toc_disc *

disc

)

Tell the number of 2048 byte blocks covered by the table of content.

Wrapper for: burn_disc_get_sectors()

Since:

0.1.6

Parameters:

disc

The master handle of the media

Returns:

number of blocks, <=0 indicates unknown or unreadable state

Definition at line 1297 of file burn_wrap.c.

References isoburn_toc_disc::disc, isoburn_toc_entry::next, isoburn_toc_entry::start_lba, isoburn_toc_disc::toc, and isoburn_toc_entry::track_blocks.

{
 struct isoburn_toc_entry *t;
 int ret= 0;

 if(disc==NULL)
   return(0);
 if(disc->toc!=NULL) {
   for(t= disc->toc; t!=NULL; t= t->next)
     ret= t->start_lba + t->track_blocks;
 } else if(disc->disc!=NULL)
   ret= burn_disc_get_sectors(disc->disc);
 return(ret);
}

struct isoburn_toc_session** isoburn_toc_disc_get_sessions	(	struct isoburn_toc_disc *	disc,
		int *	num
	)			[read]

Get the array of session handles from the table of content.

Wrapper for: burn_disc_get_sessions()

Since:

0.1.6

Parameters:

	disc	The master handle of the media
	num	returns the number of sessions in the array

Returns:

the address of the array of session handles

Definition at line 1313 of file burn_wrap.c.

References isoburn_toc_disc::session_count, and isoburn_toc_disc::session_pointers.

Referenced by isoburn_set_msc1().

{
 *num= disc->session_count;
 return(disc->session_pointers);
}

struct isoburn_toc_disc* isoburn_toc_drive_get_disc

(

struct burn_drive *

d

)

[read]

Obtain a master handle for the table of content.

This handle governs allocated resources which have to be released by isoburn_toc_disc_free() when no longer needed. Wrapper for: burn_drive_get_disc()

Since:

0.1.6

Parameters:

drive

The drive with the media to inspect

Returns:

NULL in case there is no content info, else it is a valid handle

Definition at line 1211 of file burn_wrap.c.

References isoburn_toc_disc::disc, isoburn_find_emulator(), isoburn_toc_new_arrays(), isoburn_toc_entry::next, isoburn_toc_session::session, isoburn_toc_disc::session_count, isoburn_toc_disc::session_pointers, isoburn_toc_disc::sessions, isoburn::toc, isoburn_toc_disc::toc, isoburn_toc_track::toc_entry, isoburn_toc_session::toc_entry, isoburn_toc_track::track, isoburn_toc_session::track_count, isoburn_toc_disc::track_count, isoburn_toc_session::track_pointers, isoburn_toc_disc::track_pointers, and isoburn_toc_disc::tracks.

Referenced by isoburn_set_msc1().

{
 int ret, session_count= 0, track_count= 0, num_tracks= 0, i, j;
 struct isoburn *o;
 struct isoburn_toc_entry *t;
 struct isoburn_toc_disc *toc_disc= NULL;
 struct burn_session **s;
 struct burn_track **tracks;

 toc_disc= calloc(1, sizeof(struct isoburn_toc_disc));
 if(toc_disc==NULL)
   return(NULL);
 toc_disc->disc= NULL;
 toc_disc->sessions= NULL;
 toc_disc->session_pointers= NULL;
 toc_disc->tracks= NULL;
 toc_disc->track_pointers= NULL;
 toc_disc->session_count= 0;
 toc_disc->track_count= 0;
 toc_disc->toc= NULL; 

 /* is the media emulated multi-session ? */
 ret= isoburn_find_emulator(&o, d, 0);
 if(ret<0)
   goto libburn;
 if(o->toc==NULL)
   goto libburn;

 /* This is an emulated TOC */
 toc_disc->toc= o->toc;
 for(t= toc_disc->toc; t!=NULL; t= t->next)
   session_count++;
 ret= isoburn_toc_new_arrays(toc_disc, session_count, session_count, 0);
 if(ret<=0)
   goto failure;
 t= toc_disc->toc;
 for(i= 0; i<session_count; i++) {
   toc_disc->sessions[i].track_pointers= toc_disc->track_pointers+i;
   toc_disc->sessions[i].track_count= 1;
   toc_disc->sessions[i].toc_entry= t;
   toc_disc->session_pointers[i]= toc_disc->sessions+i;
   toc_disc->tracks[i].toc_entry= t;
   toc_disc->track_pointers[i]= toc_disc->tracks+i;
   t= t->next;
 }
 toc_disc->session_count= session_count;
 toc_disc->track_count= session_count;
 return(toc_disc);

libburn:;
 /* This is a libburn provided TOC */
 toc_disc->disc= burn_drive_get_disc(d);
 if(toc_disc->disc == NULL) {
failure:;
   free((char *) toc_disc);
   return(NULL);
 }
 s= burn_disc_get_sessions(toc_disc->disc, &session_count);
 for(i= 0; i<session_count; i++) {
   tracks = burn_session_get_tracks(s[i], &num_tracks);
   track_count+= num_tracks;
 }
 if(session_count<=0 || track_count<=0)
   goto failure;
 ret= isoburn_toc_new_arrays(toc_disc, session_count, track_count, 0);
 if(ret<=0)
   goto failure;
 track_count= 0;
 for(i= 0; i<session_count; i++) {
   tracks = burn_session_get_tracks(s[i], &num_tracks);
   toc_disc->sessions[i].session= s[i];
   toc_disc->sessions[i].track_pointers= toc_disc->track_pointers+track_count;
   toc_disc->sessions[i].track_count= num_tracks;
   toc_disc->session_pointers[i]= toc_disc->sessions+i;
   for(j= 0; j<num_tracks; j++) {
     toc_disc->tracks[track_count+j].track= tracks[j];
     toc_disc->track_pointers[track_count+j]= toc_disc->tracks+(track_count+j);
   }
   track_count+= num_tracks;
 }
 toc_disc->session_count= session_count;
 toc_disc->track_count= track_count;
 return(toc_disc);
}

int isoburn_toc_entry_finish	(	struct burn_toc_entry *	entry,
		int	session_no,
		int	track_no,
		int	flag
	)

Definition at line 1340 of file burn_wrap.c.

Referenced by isoburn_toc_session_get_leadout_entry(), and isoburn_toc_track_get_entry().

{
 int pmin, psec, pframe;

 entry->extensions_valid= 1;
 entry->adr= 1;
 entry->control= 4;
 entry->session= session_no & 255;
 entry->session_msb= (session_no >> 8) & 255;
 entry->point= track_no & 255;
 entry->point_msb= (track_no >> 8) & 255;

 burn_lba_to_msf(entry->start_lba, &pmin, &psec, &pframe);
 if(pmin<=255)
   entry->pmin= pmin;
 else
   entry->pmin= 255;
 entry->psec= psec;
 entry->pframe= pframe; 
 return(1);
}

int isoburn_toc_new_arrays	(	struct isoburn_toc_disc *	o,
		int	session_count,
		int	track_count,
		int	flag
	)

Definition at line 1160 of file burn_wrap.c.

References isoburn_toc_destroy_arrays(), isoburn_toc_session::session, isoburn_toc_disc::session_pointers, isoburn_toc_disc::sessions, isoburn_toc_track::toc_entry, isoburn_toc_session::toc_entry, isoburn_toc_track::track, isoburn_toc_session::track_count, isoburn_toc_session::track_pointers, isoburn_toc_disc::track_pointers, and isoburn_toc_disc::tracks.

Referenced by isoburn_toc_drive_get_disc().

{
 int i;
 int isoburn_toc_destroy_arrays(struct isoburn_toc_disc *o, int flag);

 o->sessions= calloc(session_count, sizeof(struct isoburn_toc_session));
 o->session_pointers=
                   calloc(session_count, sizeof(struct isoburn_toc_session *));
 o->tracks= calloc(track_count, sizeof(struct isoburn_toc_track));
 o->track_pointers= calloc(track_count, sizeof(struct isoburn_toc_track *));
 if(o->sessions!=NULL && o->session_pointers!=NULL &&
    o->tracks!=NULL && o->track_pointers!=NULL) {
   for(i= 0; i<session_count; i++) {
     o->sessions[i].session= NULL;
     o->sessions[i].track_pointers= NULL;
     o->sessions[i].track_count= 0;
     o->sessions[i].toc_entry= NULL;
     o->session_pointers[i]= NULL;
   }
   for(i= 0; i<track_count; i++) {
     o->tracks[i].track= NULL;
     o->tracks[i].toc_entry= NULL;
     o->track_pointers[i]= NULL;
   }
   return(1);
 }
 /* failed */
 isoburn_toc_destroy_arrays(o, 0);
 return(-1);
}

void isoburn_toc_session_get_leadout_entry	(	struct isoburn_toc_session *	s,
		struct burn_toc_entry *	entry
	)

Obtain a copy of the entry which describes the end of a particular session.

Wrapper for: burn_session_get_leadout_entry()

Since:

0.1.6

Parameters:

	s	The session handle
	entry	A pointer to memory provided by the caller. It will be filled with info according to struct burn_toc_entry as defined in libburn.h

Definition at line 1364 of file burn_wrap.c.

References isoburn_toc_entry_finish(), isoburn_toc_entry::session, isoburn_toc_session::session, isoburn_toc_entry::start_lba, isoburn_toc_track::toc_entry, isoburn_toc_session::toc_entry, isoburn_toc_entry::track_blocks, isoburn_toc_session::track_count, isoburn_toc_entry::track_no, and isoburn_toc_session::track_pointers.

{
 struct isoburn_toc_track *t;

 if(s==NULL)
   return;
 if(s->session!=NULL && s->toc_entry==NULL) {
   burn_session_get_leadout_entry(s->session, entry);
   return;
 }
 if(s->track_count<=0 || s->track_pointers==NULL || s->toc_entry==NULL)
   return;
 t= s->track_pointers[s->track_count-1];
 entry->start_lba= t->toc_entry->start_lba + t->toc_entry->track_blocks;
 entry->track_blocks= 0;
 isoburn_toc_entry_finish(entry, s->toc_entry->session, t->toc_entry->track_no,
                          0);
}

int isoburn_toc_session_get_sectors

(

struct isoburn_toc_session *

s

)

Tell the number of 2048 byte blocks covered by a particular session.

Wrapper for: burn_session_get_sectors()

Since:

0.1.6

Parameters:

s

The session handle

Returns:

number of blocks, <=0 indicates unknown or unreadable state

Definition at line 1321 of file burn_wrap.c.

References isoburn_toc_entry::next, isoburn_toc_session::session, isoburn_toc_session::toc_entry, isoburn_toc_entry::track_blocks, and isoburn_toc_session::track_count.

{
 struct isoburn_toc_entry *t;
 int count= 0, i;

 if(s==NULL)
   return(0);
 if(s->toc_entry!=NULL) {
   t= s->toc_entry;
   for(i= 0; i<s->track_count; i++) {
     count+= t->track_blocks;
     t= t->next;
   }
 } else if(s->session!=NULL)
   count= burn_session_get_sectors(s->session);
 return(count);
}

struct isoburn_toc_track** isoburn_toc_session_get_tracks	(	struct isoburn_toc_session *	s,
		int *	num
	)			[read]

Get the array of track handles from a particular session.

Wrapper for: burn_session_get_tracks()

Since:

0.1.6

Parameters:

	s	The session handle
	num	returns the number of tracks in the array

Returns:

the address of the array of track handles

Definition at line 1385 of file burn_wrap.c.

References isoburn_toc_session::track_count, and isoburn_toc_session::track_pointers.

Referenced by isoburn_set_msc1().

{
 *num= s->track_count;
 return(s->track_pointers);
}

void isoburn_toc_track_get_entry	(	struct isoburn_toc_track *	t,
		struct burn_toc_entry *	entry
	)

Obtain a copy of the entry which describes a particular itrack.

Wrapper for: burn_track_get_entry()

Since:

0.1.6

Parameters:

	s	The track handle
	entry	A pointer to memory provided by the caller. It will be filled with info according to struct burn_toc_entry as defined in libburn.h

Definition at line 1393 of file burn_wrap.c.

References isoburn_toc_entry_finish(), isoburn_toc_entry::session, isoburn_toc_entry::start_lba, isoburn_toc_track::toc_entry, isoburn_toc_track::track, isoburn_toc_entry::track_blocks, and isoburn_toc_entry::track_no.

Referenced by isoburn_get_track_lba().

{
 if(t==0)
   return;
 if(t->track!=NULL && t->toc_entry==NULL) {
   burn_track_get_entry(t->track, entry);
   return;
 }
 if(t->toc_entry==NULL)
   return;
 entry->start_lba= t->toc_entry->start_lba;
 entry->track_blocks= t->toc_entry->track_blocks;
 isoburn_toc_entry_finish(entry, t->toc_entry->session, t->toc_entry->track_no,
                          0);
}

static int isoburn_welcome_media	(	struct isoburn **	o,
		struct burn_drive *	d,
		int	flag
	)			[static]

Examines the media and sets appropriate emulation if needed.

Parameters:

flag

bit0= pretent blank on overwriteable media bit3= if the drive reports a -ROM profile then try to read table of content by scanning for ISO image headers.

Definition at line 267 of file burn_wrap.c.

References isoburn_emulate_toc(), isoburn_is_intermediate_dvd_rw(), isoburn_new(), isoburn_start_emulation(), libisoburn_default_msgs_submit, libisoburn_default_msgs_submit_flag, libisoburn_default_msgs_submit_handle, isoburn_toc_entry::next, isoburn::nwa, and isoburn_toc_entry::start_lba.

Referenced by isoburn_drive_aquire(), and isoburn_drive_grab().

{
 int ret, lba, nwa, profile, readonly= 0;
 struct burn_multi_caps *caps= NULL;
 struct isoburn_toc_entry *t;
 char profile_name[80];

 profile_name[0]= 0;
 ret= burn_disc_get_profile(d, &profile, profile_name);
 if(ret<=0)
   profile= 0x00;
 ret= burn_disc_get_multi_caps(d, BURN_WRITE_NONE, &caps, 0);
 if(ret<0) /* == 0 is read-only media, but it is too early to reject it here */
   goto ex;
 if(ret==0)
   readonly= 1;
 ret= isoburn_new(o, 0);
 if(ret<=0)
   goto ex;
 (*o)->drive= d;
 (*o)->msgs_submit= libisoburn_default_msgs_submit;
 (*o)->msgs_submit_handle= libisoburn_default_msgs_submit_handle;
 (*o)->msgs_submit_flag= libisoburn_default_msgs_submit_flag;

#ifdef Hardcoded_cd_rW
 /* <<< A70929 : hardcoded CD-RW with fabricated -msinfo */
 caps->start_adr= 0;
 (*o)->fabricated_disc_status= BURN_DISC_APPENDABLE;
#endif

 if(caps->start_adr) {         /* set emulation to overwriteable */
   (*o)->emulation_mode= 1;
   ret= isoburn_is_intermediate_dvd_rw(d, 0);
   if(ret>0) {
     (*o)->min_start_byte= 0;
     (*o)->nwa= 0;
     (*o)->zero_nwa= 0;
   }
   if(flag&1) {
     (*o)->nwa= (*o)->zero_nwa;
     (*o)->fabricated_disc_status= BURN_DISC_BLANK;
   } else {
     ret= isoburn_start_emulation(*o, 0);
     if(ret<=0) {
       (*o)->emulation_mode= -1;
       goto ex;
     }
     /* try to read emulated toc */
     ret= isoburn_emulate_toc(d, 0);
     if(ret<0) {
       (*o)->emulation_mode= -1;
       goto ex;
     }
   }

 } else {

    /* >>> recognize unsuitable media (but allow read-only media) */;

   if(readonly) {
     /* This might be overwriteable media in a -ROM drive */
     ret= isoburn_emulate_toc(d, 1);
     if(ret<0)
       goto ex;
     if(ret==0 && profile !=0x08 && (flag&8)) {
       /* This might also be multi-session media which do not
          get shown with a decent TOC.
          CD-R TOC (profile 0x08) can be trusted. Others not.
          Do a scan search of ISO headers.
       */
       ret= isoburn_emulate_toc(d, 1|2);
       if(ret<0)
         goto ex;
       if(ret>0) { /* point msc1 to last session */
         if((*o)->toc!=NULL) {
           for(t= (*o)->toc; t->next!=NULL; t= t->next);
            (*o)->fabricated_msc1= t->start_lba;
         }
       }
     }
   }
#ifdef Hardcoded_cd_rW
   (*o)->nwa= Hardcoded_cd_rw_nwA;
#else
   ret= burn_disc_track_lba_nwa(d, NULL, 0, &lba, &nwa);
   if(ret>0)
     (*o)->nwa= nwa;
#endif

 }

 ret= 1;
ex:
 if(caps!=NULL)
   burn_disc_free_multi_caps(&caps);
 return(ret);
}

---

Variable Documentation

struct isoburn* isoburn_list_start

Definition at line 103 of file isoburn.c.

int(* libisoburn_default_msgs_submit)(void *handle, int error_code, char msg_text[], int os_errno, char severity[], int flag)

Referenced by isoburn_msgs_submit(), isoburn_set_msgs_submit(), and isoburn_welcome_media().

int libisoburn_default_msgs_submit_flag

Definition at line 48 of file isoburn.c.

Referenced by isoburn_msgs_submit(), isoburn_set_msgs_submit(), and isoburn_welcome_media().

void* libisoburn_default_msgs_submit_handle

Definition at line 47 of file isoburn.c.

Referenced by isoburn_msgs_submit(), isoburn_set_msgs_submit(), and isoburn_welcome_media().