Add a last beat hint. The real last beat will be at least as long as the hint.

stepmania/src/NotesLoaderSM.cpp

@@ -293,6 +293,9 @@ bool SMLoader::LoadFromSMFile( const RString &sPath, Song &out )
 				continue;
 			out.m_fMusicLengthSeconds = StringToFloat( sParams[1] );
 		}
+		
+		else if( sValueName=="LASTBEATHINT" )
+			out.m_fSpecifiedLastBeat = StringToFloat( sParams[1] );
 
 		else if( sValueName=="MUSICBYTES" )
 			; /* ignore */

stepmania/src/NotesWriterSM.cpp

@@ -54,6 +54,8 @@ void NotesWriterSM::WriteGlobalTags( RageFile &f, const Song &out )
 	f.PutLine( ssprintf( "#OFFSET:%.3f;", out.m_Timing.m_fBeat0OffsetInSeconds ) );
 	f.PutLine( ssprintf( "#SAMPLESTART:%.3f;", out.m_fMusicSampleStartSeconds ) );
 	f.PutLine( ssprintf( "#SAMPLELENGTH:%.3f;", out.m_fMusicSampleLengthSeconds ) );
+	if( out.m_fSpecifiedLastBeat > 0 )
+		f.PutLine( ssprintf("#LASTBEATHINT:%.3f;", out.m_fSpecifiedLastBeat) );
 
 	f.Write( "#SELECTABLE:" );
 	switch(out.m_SelectionDisplay) {

stepmania/src/Song.cpp

@@ -33,7 +33,7 @@
 #include <set>
 #include <float.h>
 
-const int FILE_CACHE_VERSION = 150;	// increment this to invalidate cache
+const int FILE_CACHE_VERSION = 151;	// increment this to invalidate cache
 
 const float DEFAULT_MUSIC_SAMPLE_LENGTH = 12.f;
 
@@ -53,6 +53,7 @@ Song::Song()
 	m_fMusicLengthSeconds = 0;
 	m_fFirstBeat = -1;
 	m_fLastBeat = -1;
+	m_fSpecifiedLastBeat = -1;
 	m_SelectionDisplay = SHOW_ALWAYS;
 	m_DisplayBPMType = DISPLAY_ACTUAL;
 	m_fSpecifiedBPMMin = 0;
@@ -657,7 +658,7 @@ void Song::TranslateTitles()
 void Song::ReCalculateRadarValuesAndLastBeat()
 {
 	float fFirstBeat = FLT_MAX; /* inf */
-	float fLastBeat = 0;
+	float fLastBeat = m_fSpecifiedLastBeat; // Make sure we're at least as long as the specified amount.
 
 	for( unsigned i=0; i<m_vpSteps.size(); i++ )
 	{

stepmania/src/song.h

@@ -117,6 +117,7 @@ public:
 	float	m_fMusicLengthSeconds;
 	float	m_fFirstBeat;	// beat of first note
 	float	m_fLastBeat;	// beat of last note
+	float	m_fSpecifiedLastBeat;	// specified last beat of the song
 	float	m_fMusicSampleStartSeconds;
 	float	m_fMusicSampleLengthSeconds;
 	enum { DISPLAY_ACTUAL, DISPLAY_SPECIFIED, DISPLAY_RANDOM } m_DisplayBPMType;