Enabled -isosize for first track by help of fifo and without seeking

libburn/libburn.h

@@ -1242,7 +1242,6 @@ enum burn_source_status burn_track_set_source(struct burn_track *t,
 */
 int burn_track_set_default_size(struct burn_track *t, off_t size);
 
-
 /** Free a burn_source (decrease its refcount and maybe free it)
 	@param s Source to free
 */
@@ -1263,6 +1262,16 @@ struct burn_source *burn_file_source_new(const char *path,
 struct burn_source *burn_fd_source_new(int datafd, int subfd, off_t size);
 
 
+/* ts A70328 */
+/** Sets a fixed track size after the data source object has already been
+    created.
+    @param t The track to poperate on
+    @param size the number of bytes to use as track size
+    @return <=0 indicates failure , >0 success
+*/
+int burn_track_set_size(struct burn_track *t, off_t size);
+
+
 /** Tells how long a track will be on disc
     >>> NOTE: Not reliable with tracks of undefined length
 */

libburn/structure.c

@@ -353,9 +353,13 @@ int burn_track_set_sectors(struct burn_track *t, int sectors)
 }
 
 
-/* ts A70218 */
+/* ts A70218 , API since A70328 */
 int burn_track_set_size(struct burn_track *t, off_t size)
 {
+	if (t->source == NULL)
+		return 0;
+	if (t->source->set_size == NULL)
+		return 0;
 	t->open_ended = (size <= 0);
 	return t->source->set_size(t->source, size);
 }