[brasero] Add safeguards for DVD-RW sequential that were not fully formatted

[Philippe Rouquier <philippr src gnome org>]

commit 1875788061687f5bfbe7b6a581e68d4e94c38e8d
Author: Philippe Rouquier <bonfire-app wanadoo fr>
Date:   Mon Sep 7 15:51:13 2009 +0200

    Add safeguards for DVD-RW sequential that were not fully formatted
    Handle the case where the user really wants multisession => full blanking

 libbrasero-burn/brasero-caps-session.c |   43 ++++++++++++++++++++++++++++++++
 1 files changed, 43 insertions(+), 0 deletions(-)
---
diff --git a/libbrasero-burn/brasero-caps-session.c b/libbrasero-burn/brasero-caps-session.c
index 973fa5e..907e6e1 100644
--- a/libbrasero-burn/brasero-caps-session.c
+++ b/libbrasero-burn/brasero-caps-session.c
@@ -129,6 +129,21 @@ brasero_burn_caps_get_blanking_flags_real (BraseroBurnCaps *caps,
 		return BRASERO_BURN_NOT_SUPPORTED;
 	}
 
+	/* This is a special case that is in MMC specs:
+	 * DVD-RW sequential must be fully blanked
+	 * if we really want multisession support. */
+	if (BRASERO_MEDIUM_IS (media, BRASERO_MEDIUM_DVDRW)
+	&& (session_flags & BRASERO_BURN_FLAG_MULTI)) {
+		if (compulsory_flags & BRASERO_BURN_FLAG_FAST_BLANK) {
+			BRASERO_BURN_LOG ("fast media blanking only supported but multisession required for DVDRW");
+			return BRASERO_BURN_NOT_SUPPORTED;
+		}
+
+		supported_flags &= ~BRASERO_BURN_FLAG_FAST_BLANK;
+
+		BRASERO_BURN_LOG ("removed fast blank for a DVDRW with multisession");
+	}
+
 	if (supported)
 		*supported = supported_flags;
 	if (compulsory)
@@ -202,6 +217,16 @@ brasero_burn_caps_can_blank_real (BraseroBurnCaps *self,
 		return BRASERO_BURN_NOT_SUPPORTED;
 	}
 
+	/* This is a special case from MMC: DVD-RW sequential
+	 * can only be multisession is they were fully blanked
+	 * so if there are the two flags, abort. */
+	if (BRASERO_MEDIUM_IS (media, BRASERO_MEDIUM_DVDRW)
+	&&  (flags & BRASERO_BURN_FLAG_MULTI)
+	&&  (flags & BRASERO_BURN_FLAG_FAST_BLANK)) {
+		BRASERO_BURN_LOG ("fast media blanking only supported but multisession required for DVDRW");
+		return BRASERO_BURN_NOT_SUPPORTED;
+	}
+
 	for (iter = self->priv->caps_list; iter; iter = iter->next) {
 		BraseroCaps *caps;
 		GSList *links;
@@ -1542,6 +1567,24 @@ brasero_burn_caps_get_flags_for_medium (BraseroBurnCaps *self,
 	else if (result != BRASERO_BURN_OK)
 		return result;
 
+	/* These are a special case for DVDRW sequential */
+	if (BRASERO_MEDIUM_IS (media, BRASERO_MEDIUM_DVDRW)) {
+		/* That's a way to give priority to MULTI over FAST
+		 * and leave the possibility to always use MULTI. */
+		if (session_flags & BRASERO_BURN_FLAG_MULTI)
+			(*supported_flags) &= ~BRASERO_BURN_FLAG_FAST_BLANK;
+		else if ((session_flags & BRASERO_BURN_FLAG_FAST_BLANK)
+		         &&  (session_flags & BRASERO_BURN_FLAG_BLANK_BEFORE_WRITE)) {
+			/* We should be able to handle this case differently but unfortunately
+			 * there are buggy firmwares that won't report properly the supported
+			 * mode writes */
+			if (!((*supported_flags) & BRASERO_BURN_FLAG_DAO))
+					 return BRASERO_BURN_NOT_SUPPORTED;
+
+			(*compulsory_flags) |= BRASERO_BURN_FLAG_DAO;
+		}
+	}
+
 	if (session_flags & BRASERO_BURN_FLAG_BLANK_BEFORE_WRITE) {
 		/* make sure we remove MERGE/APPEND from supported and
 		 * compulsory since that's not possible anymore */