Rounding up fabricated nwa to full 32k addresses, API call for exact image size

libisoburn/trunk/src/burn_wrap.c

@@ -393,6 +393,9 @@ int isoburn_set_start_byte(struct isoburn *o, off_t value, int flag)
  if(value % caps->start_alignment)
    value+= caps->start_alignment - (value % caps->start_alignment);
  o->nwa= value/2048;
+ /* If suitable for alignment, round up to full 16 sector addresses */
+ if((o->nwa%16) && ((16*2048) % caps->start_alignment)==0 )
+   o->nwa+= 16 - (o->nwa%16);
  ret= 1;
 ex:
  if(caps!=NULL)
@@ -401,6 +404,24 @@ ex:
 }
 
 
+int isoburn_get_min_start_byte(struct burn_drive *d, off_t *start_byte,
+                               int flag)
+{
+ 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_drive_wrote_well(struct burn_drive *d)
 {
  int ret;

libisoburn/trunk/src/libisoburn.h

@@ -205,8 +205,21 @@ int isoburn_disc_track_lba_nwa(struct burn_drive *d, struct burn_write_opts *o,
                                int trackno, int *lba, int *nwa);
 
 
-/** Prepare a disc for writting the new session.
+/** Obtain the size which was attributed to an emulated appendable on actually
-    @param disc A burn_disc suitable to pass to isoburn_disc_write.
+    overwriteable media. This value is supposed to be <= 2048 * nwa as of
+    isoburn_disc_track_lba_nwa().
+    @param drive The drive holding the media.
+    @param start_byte The reply value counted in bytes, not in sectors.
+    @param flag  Unused yet. Submit 0.
+    @return 1=stat_byte is valid, 0=not an emulated appendable, -1=error 
+*/
+int isoburn_get_min_start_byte(struct burn_drive *d, off_t *start_byte,
+                               int flag);
+
+
+/** Prepare a disc for writing the new session.
+    @param drive The target drive
+    @param disc A burn_disc suitable to pass to isoburn_disc_write().
     @return <=0 error , 1 = success
 */
 int isoburn_prepare_disc(struct burn_drive *d, struct burn_disc **disc,

libisoburn/trunk/test/xorriso_timestamp.h

@@ -1 +1 @@
-#define Xorriso_timestamP "2007.10.17.213852"
+#define Xorriso_timestamP "2007.10.17.214228"

libisoburn/trunk/test/xorrisoburn.c

@@ -563,7 +563,17 @@ int Xorriso_toc(struct XorrisO *xorriso, int flag)
  disc= burn_drive_get_disc(drive);
  if (disc==NULL) {
    Xorriso_process_msg_queues(xorriso,0);
+
+#define Xorriso_with_isoburn_get_min_start_bytE 1
+#ifdef Xorriso_with_isoburn_get_min_start_bytE
+   { off_t start_byte= 0;
+     ret= isoburn_get_min_start_byte(drive, &start_byte, 0);
+     nwa= start_byte / 2048;
+   }
+#else
    ret= isoburn_disc_track_lba_nwa(drive, NULL, 0, &lba, &nwa);
+#endif
+
    if(ret<=0) {
      sprintf(xorriso->info_text, "Cannot obtain Table Of Content");
      Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "SORRY", 0);
@@ -611,18 +621,16 @@ int Xorriso_toc(struct XorrisO *xorriso, int flag)
      sprintf(respt+strlen(respt), "leadout            lba: %9d\n", lba);
      Xorriso_result(xorriso,0);
      last_track_size= lba - last_track_start;
-     if (s == BURN_DISC_APPENDABLE) {
-       ret= isoburn_disc_track_lba_nwa(drive, NULL, 0, &lba, &nwa);
-       if(ret<=0)
-         nwa= 0;
-     }
    }
  }
 
  if (s == BURN_DISC_APPENDABLE && nwa>0) {
+   ret= isoburn_disc_track_lba_nwa(drive, NULL, 0, &lba, &nwa);
+   if(ret>0) {
      sprintf(respt, "Media nwa    : %ds\n", nwa);
      Xorriso_result(xorriso,0);
    }
+ }
 
  if (disc!=NULL)
    burn_disc_free(disc);