Adjustable write position for DVD+RW: burn_write_opts_set_start_byte()

libburn/trunk/cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2006.12.21.214641"
+#define Cdrskin_timestamP "2006.12.23.102056"

libburn/trunk/libburn/libburn.h

@@ -765,7 +765,7 @@ struct burn_write_opts *burn_write_opts_new(struct burn_drive *drive);
 void burn_write_opts_free(struct burn_write_opts *opts);
 
 /** Creates a read_opts struct for reading from the specified drive
-    must be freed with burn_write_opts_free
+    must be freed with burn_read_opts_free
     @param drive The drive to read from
     @return The read_opts
 */
@@ -1062,13 +1062,26 @@ void burn_write_opts_set_mediacatalog(struct burn_write_opts *opts, unsigned cha
 
 
 /* ts A61106 */
-/* Sets the multi flag which eventually marks the emerging session as not being
+/** Sets the multi flag which eventually marks the emerging session as not
-   the last one and thus creating a BURN_DISC_APPENDABLE media.
+    being the last one and thus creating a BURN_DISC_APPENDABLE media.
     @param multi 1=media will be appendable, 0=media will be closed (default) 
 */
 void burn_write_opts_set_multi(struct burn_write_opts *opts, int multi);
 
 
+/* ts A61222 */
+/** Sets a start address for writing to media and write modes which allow to
+    choose this address at all (DVD+RW only for now). The address is given in
+    bytes. If it is not -1 then a write run will fail if choice of start
+    address is not supported or if the block alignment of the address is not
+    suitable for media and write mode. (Alignment to 32 kB blocks is advised
+    with DVD media.)
+    @param opts The write opts to change
+    @param value The address in bytes (-1 = start at default address)
+*/
+void burn_write_opts_set_start_byte(struct burn_write_opts *opts, off_t value);
+
+
 /** Sets whether to read in raw mode or not
     @param opts The read opts to change
     @param raw_mode If non-zero, reading will be done in raw mode, so that everything in the data tracks on the

libburn/trunk/libburn/options.c

@@ -33,6 +33,7 @@ struct burn_write_opts *burn_write_opts_new(struct burn_drive *drive)
 	opts->underrun_proof = drive->mdata->underrun_proof;
 	opts->perform_opc = 1;
 	opts->obs = -1;
+	opts->start_byte = 0;
 	opts->has_mediacatalog = 0;
 	opts->format = BURN_CDROM;
 	opts->multi = 0;
@@ -153,6 +154,7 @@ void burn_write_opts_set_mediacatalog(struct burn_write_opts *opts,
 	memcpy(opts->mediacatalog, &mediacatalog, 13);
 }
 
+
 /* ts A61106 */
 void burn_write_opts_set_multi(struct burn_write_opts *opts, int multi)
 {
@@ -160,6 +162,12 @@ void burn_write_opts_set_multi(struct burn_write_opts *opts, int multi)
 }
 
 
+/* ts A61222 */
+void burn_write_opts_set_start_byte(struct burn_write_opts *opts, off_t value)
+{
+	opts->start_byte = value;
+}
+
 
 void burn_read_opts_set_raw(struct burn_read_opts *opts, int raw)
 {

libburn/trunk/libburn/options.h

@@ -37,6 +37,9 @@ struct burn_write_opts
 			 -1 with CD, 32 kB with DVD */
 	int obs;
 
+	/* ts A61222 : Start address for media which allow a choice */
+	off_t start_byte;
+
 	/** A disc can have a media catalog number */
 	int has_mediacatalog;
 	unsigned char mediacatalog[13];

libburn/trunk/libburn/write.c

@@ -909,6 +909,7 @@ int burn_disc_setup_dvd_plus_rw(struct burn_write_opts *o,
 {
 	struct burn_drive *d = o->drive;
 	int ret;
+	char msg[160];
 
 	if (d->bg_format_status==0 || d->bg_format_status==1) {
 		/* start or re-start dvd_plus_rw formatting */
@@ -916,14 +917,18 @@ int burn_disc_setup_dvd_plus_rw(struct burn_write_opts *o,
 		if (ret <= 0)
 			return 0;
 	}
+	d->nwa = 0;
+	if (o->start_byte >= 0)
+		d->nwa = o->start_byte / 2048;
 
-	/* >>> Set speed */;
+	sprintf(msg, "Write start address is  %d * 2048\n", d->nwa);
+	libdax_msgs_submit(libdax_messenger, d->global_index,
+			0x00020127,
+			LIBDAX_MSGS_SEV_NOTE, LIBDAX_MSGS_PRIO_HIGH,
+			msg, 0,0);
 
 	/* >>> perform OPC if needed */;
 
-	d->nwa = 0;
-	/* >>> d->get_nwa() (default to 0) */;
-
 	/* >>> ? what else ? */;
 
 	return 1;
@@ -977,6 +982,15 @@ int burn_dvd_write_sync(struct burn_write_opts *o,
 				msg, 0,0);
 			goto early_failure;
 		}
+		if (o->start_byte >= 0 && (o->start_byte % 2048)) {
+			sprintf(msg,
+			  "Write start address not properly aligned to 2048");
+			libdax_msgs_submit(libdax_messenger, d->global_index,
+				0x00020125,
+				LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
+				msg, 0,0);
+			goto early_failure;
+		}
 
 	} else {
 		sprintf(msg, "Unsuitable media detected. Profile %4.4Xh  %s",
@@ -987,7 +1001,6 @@ int burn_dvd_write_sync(struct burn_write_opts *o,
 			msg, 0,0);
 		goto early_failure;
 	}
-	
 	o->obs = 32*1024; /* buffer flush trigger for sector.c:get_sector() */
 
 	burn_disc_init_write_status(o, disc);
@@ -1017,7 +1030,6 @@ early_failure:;
 	pthread_mutex_lock(&d->access_lock);
 	d->cancel = 1;
 	pthread_mutex_unlock(&d->access_lock);
-	usleep(500001); /* to avoid a warning from remove_worker() */
 	return 0;
 }
 
@@ -1048,6 +1060,15 @@ void burn_disc_write_sync(struct burn_write_opts *o, struct burn_disc *disc)
 		return;
 	}
 
+	if (o->start_byte >= 0) {
+		sprintf(msg, "Write start address not supported");
+		libdax_msgs_submit(libdax_messenger, d->global_index,
+			0x00020124,
+			LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
+			msg, 0,0);
+		goto fail_wo_sync;
+	}
+
 	burn_print(1, "sync write of %d CD sessions\n", disc->sessions);
 
 /* Apparently some drives require this command to be sent, and a few drives
@@ -1181,6 +1202,7 @@ return crap.  so we send the command, then ignore the result.
 fail:
 	d->sync_cache(d);
 fail_wo_sync:;
+	usleep(500001); /* ts A61222: to avoid a warning from remove_worker()*/
 	burn_print(1, "done - failed\n");
 	libdax_msgs_submit(libdax_messenger, d->global_index, 0x0002010b,
 			LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,