New API call isoburn_toc_track_get_emul()

libisoburn/burn_wrap.c

@@ -1054,13 +1054,14 @@ int isoburn_read_iso_head(struct burn_drive *d, int lba,
 
 
 int isoburn_make_toc_entry(struct isoburn *o, int *session_count, int lba,
-                           int track_blocks, int flag)
+                           int track_blocks, char *volid, int flag)
 {
  int ret;
  struct isoburn_toc_entry *item;
 
  ret= isoburn_toc_entry_new(&item, o->toc, 0);
  if(ret<=0) {
+no_memory:;
    isoburn_msgs_submit(o, 0x00060000,
                        "Not enough memory for emulated TOC entry object",
                        0, "FATAL", 0);
@@ -1073,6 +1074,11 @@ int isoburn_make_toc_entry(struct isoburn *o, int *session_count, int lba,
  item->track_no= *session_count;
  item->start_lba= lba;
  item->track_blocks= track_blocks;
+ if(volid != NULL) {
+   item->volid= strdup(volid);
+   if(item->volid == NULL)
+     goto no_memory;
+ }
  return(1);
 }
 
@@ -1087,7 +1093,7 @@ int isoburn_emulate_toc(struct burn_drive *d, int flag)
  int scan_start= 0, scan_count= 0, probe_minus_16= 0, growisofs_nwa;
  int with_enclosure= 0;
  struct isoburn *o;
- char msg[160], size_text[80], *sev;
+ char msg[160], size_text[80], *sev, volid[33], *volid_pt= NULL;
  time_t start_time, last_pacifier, now;
  
  /* is the media emulated multi-session ? */
@@ -1120,7 +1126,7 @@ int isoburn_emulate_toc(struct burn_drive *d, int flag)
              session_count, size_text, (double) (now - start_time));
      isoburn_msgs_submit(o, 0x00060000, msg, 0, "UPDATE", 0);
    }
-   read_flag= 0;
+   read_flag= 1;
    if(flag&2)
      read_flag|= (1<<15)|((session_count>0)<<14);
    else {
@@ -1138,8 +1144,11 @@ int isoburn_emulate_toc(struct burn_drive *d, int flag)
      probe_minus_16= 0;
    }
 
-   ret= isoburn_read_iso_head(d, lba, &track_blocks, NULL, read_flag);
-   if(ret<=0) {
+   ret= isoburn_read_iso_head(d, lba, &track_blocks, volid, read_flag);
+   if(ret > 0) {
+     volid_pt= volid;
+   } else {
+     volid_pt= NULL;
      if(session_count>0) {
        if(flag&2) {
          if(ret==0) {
@@ -1157,7 +1166,7 @@ int isoburn_emulate_toc(struct burn_drive *d, int flag)
        isoburn_msgs_submit(o, 0x00060000, msg, 0, "WARNING", 0);
 
        if(with_enclosure) {
-         ret= isoburn_make_toc_entry(o, &session_count, 0, image_size, 0);
+         ret= isoburn_make_toc_entry(o, &session_count, 0, image_size, NULL,0);
          if(ret<=0)
            goto failure;
        }
@@ -1169,7 +1178,8 @@ int isoburn_emulate_toc(struct burn_drive *d, int flag)
    if(ret==2) /* ISO header was found in first half block */
      lba-= 16;
 
-   ret= isoburn_make_toc_entry(o, &session_count, lba, track_blocks, 0);
+   ret= isoburn_make_toc_entry(o, &session_count, lba, track_blocks, volid_pt,
+                               0);
    if(ret<=0)
      goto failure;
    lba+= track_blocks;
@@ -1202,7 +1212,7 @@ failure:;
  isoburn_toc_entry_destroy(&(o->toc), 1);
  if(with_enclosure && o->emulation_mode == 1) {
    session_count= 0;
-   ret= isoburn_make_toc_entry(o, &session_count, 0, image_size, 0);
+   ret= isoburn_make_toc_entry(o, &session_count, 0, image_size, NULL, 0);
  }
  return(ret);
 }
@@ -1475,6 +1485,21 @@ void isoburn_toc_track_get_entry(struct isoburn_toc_track *t,
 }
 
 
+int isoburn_toc_track_get_emul(struct isoburn_toc_track *t, int *start_lba,
+                               int *image_blocks, char volid[33], int flag)
+{
+ if(t->toc_entry == NULL)
+   return(0);
+ if(t->toc_entry->volid == NULL)
+   return(0);
+ *start_lba= t->toc_entry->start_lba;
+ *image_blocks= t->toc_entry->track_blocks;
+ strncpy(volid, t->toc_entry->volid, 32);
+ volid[32]= 0;
+ return(1);
+}
+
+
 void isoburn_toc_disc_free(struct isoburn_toc_disc *d)
 {
  if(d->disc!=NULL)

libisoburn/isoburn.c

@@ -68,6 +68,7 @@ int isoburn_toc_entry_new(struct isoburn_toc_entry **objpt,
  o->track_no= 0;
  o->start_lba= -1;
  o->track_blocks= 0;
+ o->volid= NULL;
  o->next= NULL;
  if(boss!=NULL) {
    for(s= boss; s->next!=NULL; s= s->next);
@@ -85,6 +86,8 @@ int isoburn_toc_entry_destroy(struct isoburn_toc_entry **o, int flag)
    return(0);
  if(flag&1)
    isoburn_toc_entry_destroy(&((*o)->next), flag);
+ if((*o)->volid != NULL)
+   free((*o)->volid);
  free((char *) (*o));   
  *o= NULL;
  return(1);

libisoburn/isoburn.h

@@ -22,6 +22,8 @@ struct isoburn_toc_entry {
  int start_lba;
  int track_blocks;
 
+ char *volid; /* For caching a volume id from emulated toc on overwriteables */
+
  struct isoburn_toc_entry *next;
 };
 

libisoburn/libisoburn.h

@@ -582,7 +582,7 @@ struct isoburn_toc_track **isoburn_toc_session_get_tracks(
 /** Obtain a copy of the entry which describes a particular track.
     Wrapper for: burn_track_get_entry()
     @since 0.1.6
-    @param s The track handle
+    @param t The track handle
     @param 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
@@ -591,6 +591,23 @@ void isoburn_toc_track_get_entry(struct isoburn_toc_track *t,
                                  struct burn_toc_entry *entry);
 
 
+/** Obtain eventual ISO image parameters of an emulated track. This info was
+    gained with much effort and thus gets cached in the track object.
+    If this call returns 1 then one can save a call of isoburn_read_iso_head()
+    with return mode 1 which could cause an expensive read operation.
+    @since 0.4.0
+    @param t            The track handle
+    @param start_lba    Returns the start address of the ISO session
+    @param image_blocks Returns the number of 2048 bytes blocks
+    @param volid        Caller provided memory for the volume id
+    @param flag         unused yet, submit 0
+    @return             0= not an emulated ISO session , 1= reply is valid
+*/
+int isoburn_toc_track_get_emul(struct isoburn_toc_track *t, int *start_lba,
+                               int *image_blocks, char volid[33], int flag);
+
+
+
 /** 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()
@@ -617,7 +634,7 @@ void isoburn_toc_disc_free(struct isoburn_toc_disc *disc);
                       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
+                bit15= return -1 on read error
     @return >0 seems to be a valid ISO image, 0 format not recognized, <0 error
 */
 int isoburn_read_iso_head(struct burn_drive *d, int lba,

xorriso/xorriso_timestamp.h

@@ -1 +1 @@
-#define Xorriso_timestamP "2009.04.21.184214"
+#define Xorriso_timestamP "2009.04.22.173603"