From 9a96d6a17578d6a82a73c90f442b2b4bfaefef2a Mon Sep 17 00:00:00 2001
From: Thomas Schmitt <scdbackup@gmx.net>
Date: Thu, 25 Jun 2009 12:50:57 +0000
Subject: [PATCH] Bug fix: Copies of overwriteable media onto sequential were
 mistaken in ROM drives

---
 libisoburn/burn_wrap.c      | 36 ++++++++++++++++++++++++++++++++----
 xorriso/xorriso_timestamp.h |  2 +-
 2 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/libisoburn/burn_wrap.c b/libisoburn/burn_wrap.c
index 17a94d4c..b6a3636b 100644
--- a/libisoburn/burn_wrap.c
+++ b/libisoburn/burn_wrap.c
@@ -275,6 +275,11 @@ static int isoburn_welcome_media(struct isoburn **o, struct burn_drive *d,
  struct burn_multi_caps *caps= NULL;
  struct isoburn_toc_entry *t;
  char profile_name[80];
+ struct isoburn_toc_disc *disc= NULL;
+ struct isoburn_toc_session **sessions;
+ struct isoburn_toc_track **tracks;
+ int num_sessions= 0, num_tracks= 0, track_count= 0, session_no= 0;
+ char msg[80];
 
  profile_name[0]= 0;
  ret= burn_disc_get_profile(d, &profile, profile_name);
@@ -332,15 +337,38 @@ static int isoburn_welcome_media(struct isoburn **o, struct burn_drive *d,
     /* >>> recognize unsuitable media (but allow read-only media) */;
 
    if(readonly) {
-     /* This might be overwriteable media in a -ROM drive */
-     if((flag & 16)) {
-       ret= 0;
+     /* This might be overwriteable media in a -ROM drive.
+        Pitfall:
+        Multi-session media which bear a xorriso image for overwriteables
+        in their first session would get a TOC of that first image rather
+        than of the media.
+        It is not possible to distinguish a BD-RE from a single session
+        BD-R with an image for overwriteables. But as soon as the media
+        bears 2 logical tracks it cannot be overwriteable.
+        So count the number of tracks first.
+     */
+     disc= isoburn_toc_drive_get_disc(d);
+     if(disc != NULL) {
+       sessions= isoburn_toc_disc_get_sessions(disc, &num_sessions);
+       for(session_no= 0; session_no < num_sessions; session_no++) {
+         tracks= isoburn_toc_session_get_tracks(sessions[session_no],
+                                                &num_tracks);
+         track_count+= num_tracks;
+       }
+       isoburn_toc_disc_free(disc);
+     }
+
+     sprintf(msg, "ROM media has libburn track count = %d", track_count);
+     isoburn_msgs_submit(*o, 0x00060000, msg, 0, "DEBUG", 0);
+
+     if((flag & 16) || track_count >= 2) {
+       ret= 0; /* toc emulation off, or not overwriteable */
      } else {
        ret= isoburn_emulate_toc(d, 1);
        if(ret<0)
          goto ex;
      }
-     if(ret==0 && profile !=0x08 && (flag&8)) {
+     if(ret == 0 && profile != 0x08 && (flag&8)) {
        /* This might also be multi-session media which do not
           get shown with a decent TOC.
           CD-R TOC (profile 0x08) can be trusted. Others not.
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 527955e3..8043da1f 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2009.06.24.133521"
+#define Xorriso_timestamP "2009.06.25.125048"