From 4dd8f098ac1509dabfb9952b1812d06ef9d31414 Mon Sep 17 00:00:00 2001
From: Thomas Schmitt <scdbackup@gmx.net>
Date: Sat, 14 Jul 2007 11:15:57 +0000
Subject: [PATCH] New API function burn_drive_get_best_speed()

---
 cdrskin/cdrskin_timestamp.h |  2 +-
 libburn/drive.c             | 43 +++++++++++++++++++++++++++++++++++++
 libburn/libburn.h           | 18 ++++++++++++++++
 3 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/cdrskin/cdrskin_timestamp.h b/cdrskin/cdrskin_timestamp.h
index 27fc1c3..db977aa 100644
--- a/cdrskin/cdrskin_timestamp.h
+++ b/cdrskin/cdrskin_timestamp.h
@@ -1 +1 @@
-#define Cdrskin_timestamP "2007.07.12.171832"
+#define Cdrskin_timestamP "2007.07.14.111614"
diff --git a/libburn/drive.c b/libburn/drive.c
index 7a63c7c..0d6bcff 100644
--- a/libburn/drive.c
+++ b/libburn/drive.c
@@ -1614,6 +1614,49 @@ int burn_drive_get_speedlist(struct burn_drive *d,
 }
 
 
+/* ts A70713 : API function */
+int burn_drive_get_best_speed(struct burn_drive *d, int speed_goal,
+			struct burn_speed_descriptor **best_descr, int flag)
+{
+	struct burn_speed_descriptor *sd;
+	int best_speed = 0, best_lba = 0, source= 2, speed;
+
+	if (flag & 2)
+		source = -1;
+
+	*best_descr = NULL;
+	for (sd = d->mdata->speed_descriptors; sd != NULL; sd = sd->next) {
+		if ((source >= 0 && sd->source != source) || 
+		    sd->write_speed <= 0)
+	continue;
+		if (flag & 1)
+			speed = sd->read_speed;
+		else
+			speed = sd->write_speed;
+		if (speed_goal <= 0) {
+			if ((source == 2 && sd->end_lba > best_lba) ||
+			    ((source !=2 || sd->end_lba == best_lba) &&
+			     speed > best_speed)) {
+				best_lba = sd->end_lba;
+				best_speed = speed;
+				*best_descr = sd;
+			}
+		} else if (speed <= speed_goal) {
+			if (speed > best_speed) {
+				best_speed = speed;
+				*best_descr = sd;
+			}
+		}
+	}
+	if (d->current_is_cd_profile && *best_descr == NULL && ! (flag & 2))
+		/* Mode page 2Ah is deprecated in MMC-5 although all known
+		   burners still support it with CD media. */
+		return burn_drive_get_best_speed(d, speed_goal, best_descr,
+						 flag | 2);
+	return (*best_descr != NULL);
+}
+
+
 /* ts A61226 : API function */
 int burn_drive_free_speedlist(struct burn_speed_descriptor **speed_list)
 {
diff --git a/libburn/libburn.h b/libburn/libburn.h
index cbe56ed..a207cba 100644
--- a/libburn/libburn.h
+++ b/libburn/libburn.h
@@ -1555,6 +1555,24 @@ int burn_drive_get_read_speed(struct burn_drive *d);
 int burn_drive_get_speedlist(struct burn_drive *d,
                              struct burn_speed_descriptor **speed_list);
 
+/* ts A70713 */
+/** Look up the fastest speed descriptor which is not faster than the given
+    speed_goal. If it is 0, then the fastest one is chosen among the
+    descriptors with the highest end_lba. Parameter flag decides wether the
+    speed goal means write speed or read speed.
+    @param d Drive to query
+    @param speed_goal Upper limit for speed, 0=search for maximum speed
+    @param best_descr Result of the search, NULL if no match
+    @param flag Bitfield for control purposes
+                bit0= look for best read speed rather than write speed
+                bit1= look for any source type (else look for source==2 first
+	              and for any other source type only with CD media)
+    @return >0 indicates a valid best_descr, 0 = no valid best_descr
+*/
+int burn_drive_get_best_speed(struct burn_drive *d, int speed_goal,
+                        struct burn_speed_descriptor **best_descr, int flag);
+
+
 /* ts A61226 */
 /** Dispose a speed descriptor list copy which was obtained by
     burn_drive_get_speedlist().