Update BlurayMetadata class to split parsing and opening of disc.

Also update those functions to return bool rather than void.

For some stuff I'm working on it's nice to have a convenient function to determine if the disc in the drive is a usable Blu-ray, but it might not necessarily contain Disc Library metadata.  So break it out such that I can behave one way if there's a bluray, and another if there's a bluray with metadata.

mythtv/libs/libmythdb/mythversion.h

@@ -11,7 +11,7 @@
 /// Update this whenever the plug-in API changes.
 /// Including changes in the libmythdb, libmyth, libmythtv, libmythav* and
 /// libmythui class methods used by plug-ins.
-#define MYTH_BINARY_VERSION "0.25.20110125-2"
+#define MYTH_BINARY_VERSION "0.25.20110125-3"
 
 /** \brief Increment this whenever the MythTV network protocol changes.
  *

mythtv/libs/libmythmetadata/bluraymetadata.cpp

@@ -19,7 +19,7 @@ BlurayMetadata::~BlurayMetadata()
        bd_close(m_bdnav);
 }
 
-void BlurayMetadata::Parse(void)
+bool BlurayMetadata::OpenDisc(void)
 {
     QString keyfile = QString("%1/KEYDB.cfg").arg(GetConfDir());
     QByteArray keyarray = keyfile.toAscii();
@@ -28,12 +28,20 @@ void BlurayMetadata::Parse(void)
     m_bdnav = bd_open(m_path.toLatin1().data(), keyfilepath);
 
     if (!m_bdnav)
-        return;
+        return false;
+
+    return true;
+}
+
+bool BlurayMetadata::ParseDisc(void)
+{
+    if (!m_bdnav && !OpenDisc())
+        return false;
 
     m_metadata = bd_get_meta(m_bdnav);
 
     if (!m_metadata)
-        return;
+        return false;
 
     m_title = QString(m_metadata->di_name);
     m_alttitle = QString(m_metadata->di_alternative);
@@ -56,6 +64,8 @@ void BlurayMetadata::Parse(void)
                                .arg(m_metadata->thumbnails[i].path);
         m_images.append(filepath);
     }
+
+    return true;
 }
 
 void BlurayMetadata::toMap(MetadataMap &metadataMap)

mythtv/libs/libmythmetadata/bluraymetadata.h

@@ -22,7 +22,8 @@ class MPUBLIC BlurayMetadata : public QObject
 
     void toMap(MetadataMap &metadataMap);
 
-    void Parse(void);
+    bool OpenDisc(void);
+    bool ParseDisc(void);
 
     QString      GetTitle(void) { return m_title; };
     QString      GetAlternateTitle(void) { return m_alttitle; };