Preparations for DVD-R[W] DAO

cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2007.02.03.205526"
+#define Cdrskin_timestamP "2007.02.05.132335"

libburn/mmc.c

@@ -78,9 +78,14 @@ extern struct libdax_msgs *libdax_messenger;
                is readable by afio. Third and forth veryfy too. Suddenly
                dvd+rw-mediainfo sees lba 0 with track 2. But #2 still verifies
                if one knows its address.
+   ts A70203 : DVD-RW need to get blanked fully. Then feature 0021h persists.
+               Meanwhile Incremental streaming is supported like CD TAO:
+               with unpredicted size, multi-track, multi-session.
+   ts A70205 : Beginning to implement DVD-R[W] DAO : single track and session,
+               size prediction mandatory.
 
 Todo:
-   Determine first free lba for appending data. 
+   Determine first free lba for appending data on overwriteables. 
 */
 
 
@@ -131,6 +136,10 @@ static unsigned char MMC_GET_PERFORMANCE[] =
 static unsigned char MMC_READ_FORMAT_CAPACITIES[] =
 	{ 0x23, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 
+/* ts A70205 : To describe the layout of a DVD-R[W] DAO session */
+static unsigned char MMC_RESERVE_TRACK[] =
+	{ 0x53, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+
 
 static int mmc_function_spy_do_tell = 0;
 
@@ -191,6 +200,31 @@ void mmc_send_cue_sheet(struct burn_drive *d, struct cue_sheet *s)
 }
 
 
+/* ts A70205 : Announce size of a DVD-R[W] DAO session.
+   @param size The size in bytes to be announced to the drive.
+               It will get rounded up to align to 32 KiB.
+*/
+int mmc_reserve_track(struct burn_drive *d, off_t size)
+{
+	struct command c;
+	int lba;
+
+	mmc_function_spy("mmc_reserve_track");
+	c.retry = 1;
+	c.oplen = sizeof(MMC_RESERVE_TRACK);
+	memcpy(c.opcode, MMC_RESERVE_TRACK, sizeof(MMC_RESERVE_TRACK));
+
+	/* Nice rounding trick learned from dvd+rw-tools */
+	lba = ((size + (off_t) 0x7fff) >> 11) & ~0xf;
+	mmc_int_to_four_char(c.opcode+5, lba);
+
+	c.page = NULL;
+	c.dir = NO_TRANSFER;
+	d->issue_command(d, &c);
+	return !!c.error;
+}
+
+
 /* ts A70201 :
    Common track info fetcher for mmc_get_nwa() and mmc_fake_toc()
 */
@@ -2152,6 +2186,7 @@ int mmc_setup_drive(struct burn_drive *d)
 	d->perform_opc = mmc_perform_opc;
 	d->set_speed = mmc_set_speed;
 	d->send_cue_sheet = mmc_send_cue_sheet;
+	d->reserve_track = mmc_reserve_track;
 	d->sync_cache = mmc_sync_cache;
 	d->get_nwa = mmc_get_nwa;
 	d->read_multi_session_c1 = mmc_read_multi_session_c1;

libburn/transport.h

@@ -166,6 +166,7 @@ struct burn_drive
 	     bit2= Test Write available
 	     bit3= DVD-R DL supported
 	     bit6= Buffer Under-run Free recording available (page 05h BUFE)
+	   Value -1 indicates that no 002Fh was current in the features list.
 	*/
 	int current_feat2fh_byte4;
 
@@ -250,6 +251,10 @@ struct burn_drive
 	void (*send_write_parameters) (struct burn_drive *,
 				       const struct burn_write_opts *);
 	void (*send_cue_sheet) (struct burn_drive *, struct cue_sheet *);
+
+	/* ts A70205 : Announce size of a DVD-R[W] DAO session. */
+	int (*reserve_track) (struct burn_drive *d, off_t size);
+
 	void (*sync_cache) (struct burn_drive *);
 	int (*get_erase_progress) (struct burn_drive *);
 	int (*get_nwa) (struct burn_drive *, int trackno, int *lba, int *nwa);