diff --git a/libburn/trunk/ChangeLog b/libburn/trunk/ChangeLog
index a394dbd4..9e7b24be 100644
--- a/libburn/trunk/ChangeLog
+++ b/libburn/trunk/ChangeLog
@@ -1,3 +1,9 @@
+SVN trunk (to become libburn-0.8.8.pl00.tar.gz) 
+===============================================================================
+* New API call burn_offst_source_new()
+* New API call burn_disc_get_bd_spare_info()
+
+
 libburn-0.8.6.pl00.tar.gz Fri Sep 17 2010
 ===============================================================================
 * Lifted test reservation on DVD-R DL media.
diff --git a/libburn/trunk/cdrskin/cdrskin_timestamp.h b/libburn/trunk/cdrskin/cdrskin_timestamp.h
index 33dc038c..59909da7 100644
--- a/libburn/trunk/cdrskin/cdrskin_timestamp.h
+++ b/libburn/trunk/cdrskin/cdrskin_timestamp.h
@@ -1 +1 @@
-#define Cdrskin_timestamP "2010.09.22.180921"
+#define Cdrskin_timestamP "2010.09.24.090631"
diff --git a/libburn/trunk/libburn/drive.c b/libburn/trunk/libburn/drive.c
index ce03573e..5e5d5929 100644
--- a/libburn/trunk/libburn/drive.c
+++ b/libburn/trunk/libburn/drive.c
@@ -2836,3 +2836,18 @@ int burn_disc_get_cd_info(struct burn_drive *d, char disc_type[80],
 	*valid =  d->disc_info_valid;
 	return 1;
 }
+
+
+/* ts B00924 : API */
+int burn_disc_get_bd_spare_info(struct burn_drive *d,
+				int *alloc_blocks, int *free_blocks, int flag)
+{
+	int ret;
+
+	if (burn_drive_get_drive_role(d) != 1)
+		return 0;
+	*alloc_blocks = *free_blocks = 0;
+	ret = mmc_get_bd_spare_info(d, alloc_blocks, free_blocks, 0);
+	return ret;
+}
+
diff --git a/libburn/trunk/libburn/libburn.h b/libburn/trunk/libburn/libburn.h
index 974a3ea4..4e32ad3f 100644
--- a/libburn/trunk/libburn/libburn.h
+++ b/libburn/trunk/libburn/libburn.h
@@ -1237,12 +1237,29 @@ char *burn_guess_cd_manufacturer(int m_li, int s_li, int f_li,
                      bit5= Disc is nominally erasable (Erasable bit)
                            This will be set with overwriteable media which
                            libburn normally considers to be unerasable blank.
+    @return          1 success, <= 0 an error occured
     @since 0.7.2
 */
 int burn_disc_get_cd_info(struct burn_drive *d, char disc_type[80],
                         unsigned int *disc_id, char bar_code[9], int *app_code,
 			int *valid);
 
+/* ts B00924 */
+/** Read the current usage of the eventual BD Spare Area. This area gets
+    reserved on BD media during formatting. During writing it is used to
+    host replacements of blocks which failed the checkread immediately after
+    writing.
+    This call applies only to recordable BD media. I.e. profiles 0x41 to 0x43.
+    @param d            The drive to query.
+    @param alloc_blocks Returns the number of blocks reserved as Spare Area
+    @param free_blocks  Returns the number of yet unused blocks in that area
+    @param flag         Bitfield for control purposes (unused yet, submit 0)
+    @return             1 = reply prarameters are valid,
+                        <=0 = reply is invalid (e.g. because no BD profile)
+    @since 0.8.8
+*/
+int burn_disc_get_bd_spare_info(struct burn_drive *d,
+                                int *alloc_blocks, int *free_blocks, int flag);
 
 /* ts A61110 */
 /** Read start lba and Next Writeable Address of a track from media.
@@ -1907,7 +1924,8 @@ struct burn_source *burn_fd_source_new(int datafd, int subfd, off_t size);
                has ended its work. Best is to keep them all until all tracks
                are done.
 
-    @param inp   The burn_source object from which to read stream data
+    @param inp   The burn_source object from which to read stream data.
+                 E.g. created by burn_file_source_new().
     @param prev  The eventual offset source object which shall read data from
                  inp before the new offset source will begin its own work.
                  This must either be a result of  burn_offst_source_new()  or
@@ -1916,7 +1934,8 @@ struct burn_source *burn_fd_source_new(int datafd, int subfd, off_t size);
                  consumer. inp bytes may get skipped to reach this address.
     @param size  The number of bytes to be delivered to the consumer.
     @param flag  Bitfield for control purposes (unused yet, submit 0).
-    @return      Pointer to a burn_source object, NULL indicates failure
+    @return      Pointer to a burn_source object, later to be freed by
+                 burn_source_free(). NULL indicates failure.
     @since 0.8.8
 */
 struct burn_source *burn_offst_source_new(
diff --git a/libburn/trunk/libburn/mmc.c b/libburn/trunk/libburn/mmc.c
index 5b5321ed..82b94404 100644
--- a/libburn/trunk/libburn/mmc.c
+++ b/libburn/trunk/libburn/mmc.c
@@ -3876,6 +3876,11 @@ int mmc_compose_mode_page_5(struct burn_drive *d,
 
 		pd[4] = spc_block_type(o->block_type);
 
+/*
+fprintf(stderr, "libburn_EXPERIMENTAL: block_type = %d, pd[4]= %u\n",
+                 o->block_type, (unsigned int) pd[4]);
+*/
+
 		/* ts A61104 */
 		if(!(o->control&4)) /* audio (MMC-1 table 61) */
 			if(o->write_type == BURN_WRITE_TAO)
@@ -4127,7 +4132,7 @@ static int mmc_set_product_id(char *reply,
 
 
 /* ts A90903 */
-/* MMC backend of API call burn_get_media_product_id()
+/* MMC backend of API call burn_disc_get_media_id()
    See also doc/mediainfo.txt
     @param flag        Bitfield for control purposes
                        bit0= do not escape " _/" (not suitable for
@@ -4314,6 +4319,29 @@ ex:;
 }
 
 
+/* ts B00924
+   MMC-5, 6.23.3.3.4 Format Code 0Ah: Spare Area Information
+*/
+int mmc_get_bd_spare_info(struct burn_drive *d,
+				int *alloc_blocks, int *free_blocks, int flag)
+{
+	int ret, reply_len;
+	char *reply = NULL;
+
+	ret = mmc_read_disc_structure(d, 1, 0, 0x0a, 12, &reply,
+							 &reply_len, 0);
+	if (ret <= 0)
+		goto ex;
+	*alloc_blocks = mmc_four_char_to_int((unsigned char *) reply + 8);
+	*free_blocks = mmc_four_char_to_int((unsigned char *) reply + 4);
+	ret = 1;
+ex:;
+	if (reply != NULL)
+		free(reply);
+	return ret;
+}
+
+
 /* ts A61021 : the mmc specific part of sg.c:enumerate_common()
 */
 int mmc_setup_drive(struct burn_drive *d)
diff --git a/libburn/trunk/libburn/mmc.h b/libburn/trunk/libburn/mmc.h
index 5c0a5ccb..0e47c754 100644
--- a/libburn/trunk/libburn/mmc.h
+++ b/libburn/trunk/libburn/mmc.h
@@ -106,5 +106,8 @@ int mmc_function_spy(struct burn_drive *d, char * text);
 /* ts A91118 */
 int mmc_start_if_needed(struct burn_drive *d, int flag);
 
+/* ts B00924 */
+int mmc_get_bd_spare_info(struct burn_drive *d,
+                                int *alloc_blocks, int *free_blocks, int flag);
 
 #endif /*__MMC*/