New API function isoburn_igopt_get_data_start()

libisoburn/isoburn.c

@@ -353,6 +353,7 @@ int isoburn_prepare_disc_aux(struct burn_drive *in_d, struct burn_drive *out_d,
  IsoWriteOpts *wopts= NULL;
  enum burn_disc_status state;
  int ret, fifo_chunks, lba, nwa, i, new_img, early_indev_release;
+ uint32_t data_start= -1;
  size_t buffer_size= 0, buffer_free= 0;
  char msg[160];
 
@@ -471,6 +472,16 @@ int isoburn_prepare_disc_aux(struct burn_drive *in_d, struct burn_drive *out_d,
      isoburn_data_source_shutdown(in_o->iso_data_source, 0);
  }
 
+#ifdef Libisofs_has_iwo_get_data_starT
+ ret= iso_write_opts_get_data_start(wopts, &data_start, 0);
+#else
+ ret= ISO_ERROR;
+#endif
+
+ opts->data_start_lba= -1;
+ if(ret > 0 && data_start <= 0x7FFFFFFF)
+   opts->data_start_lba= data_start;
+ 
  /* TODO check return values for failure. propertly clean-up on error */
 
  out_o->iso_source= wsrc;
@@ -801,6 +812,7 @@ int isoburn_igopt_new(struct isoburn_imgen_opts **new_o, int flag)
  o->output_charset= NULL;
  o->fifo_size= 4*1024*1024;
  o->effective_lba= -1;
+ o->data_start_lba= -1;
  return(1);
 }
 
@@ -975,3 +987,9 @@ int isoburn_igopt_get_effective_lba(struct isoburn_imgen_opts *o, int *lba)
 }
 
 
+int isoburn_igopt_get_data_start(struct isoburn_imgen_opts *o, int *lba)
+{
+ *lba= o->data_start_lba;
+ return(1);
+}
+

libisoburn/isoburn.h

@@ -436,6 +436,13 @@ struct isoburn_imgen_opts {
         If >=0: Valid block number. Block size is always 2 KiB.
     */
     int effective_lba;
+
+    /** Output value: Block address of data section start as predicted by
+                      libisofs.
+        If < 16: Invalid
+        If >=16: Valid block number. Block size is always 2 KiB.
+    */
+    int data_start_lba;
 };
 
 

libisoburn/libisoburn.h

@@ -216,7 +216,7 @@ void isoburn_version(int *major, int *minor, int *micro);
 */
 #define isoburn_libisofs_req_major  0
 #define isoburn_libisofs_req_minor  6
-#define isoburn_libisofs_req_micro 13 
+#define isoburn_libisofs_req_micro 14 
 
 /** The minimum version of libburn to be used with this version of libisoburn
     at compile time.
@@ -1060,6 +1060,21 @@ int isoburn_igopt_get_fifo_size(struct isoburn_imgen_opts *o, int *fifo_size);
 int isoburn_igopt_get_effective_lba(struct isoburn_imgen_opts *o, int *lba);
 
 
+/** Obtain after image preparation the lowest block address of file content
+    data. Failure can occur if libisofs is too old to provide this information,
+    if the result exceeds 31 bit, or if the call is made before image
+    preparation.
+    This value cannot be set by the application but only be inquired.
+    @since 0.3.4
+    @param o          The option set to work on
+    @param lba        The block number of the session start on media.
+                      <0 means that no address has been determined yet.
+    @return 1 success, <=0 failure
+*/
+int isoburn_igopt_get_data_start(struct isoburn_imgen_opts *o, int *lba);
+
+
+
 /* ----------------------------------------------------------------------- */
 /*                      End of Options for image generation                */
 /* ----------------------------------------------------------------------- */

xorriso/xorriso_timestamp.h

@@ -1 +1 @@
-#define Xorriso_timestamP "2009.02.28.175747"
+#define Xorriso_timestamP "2009.02.28.175926"