made CLI rendering smoother

Suppressed a message box that would pop up in command
line interface causing a crash and made lmms act properly
when a rendering plugin fails. Need to figure out how to
terminate program in project_renderer line 222.

include/project_renderer.h

@@ -28,6 +28,7 @@
 #include "audio_file_device.h"
 #include "lmmsconfig.h"
 
+class QTimer;
 
 class projectRenderer : public QThread
 {
@@ -83,6 +84,10 @@ public:
 	static ExportFileFormats getFileFormatFromExtension(
 							const QString & _ext );
 
+	void setConsoleUpdateTimer(QTimer * t)
+	{
+		m_consoleUpdateTimer = t;
+	}
 
 public slots:
 	void startProcessing( void );
@@ -105,6 +110,8 @@ private:
 	volatile int m_progress;
 	volatile bool m_abort;
 
+	QTimer * m_consoleUpdateTimer;
+
 } ;
 
 

src/core/audio/audio_file_device.cpp

@@ -25,9 +25,11 @@
 
 
 #include <QtGui/QMessageBox>
+#include <QtDebug>
 
 #include "audio_file_device.h"
 #include "export_project_dialog.h"
+#include "engine.h"
 
 
 audioFileDevice::audioFileDevice( const sample_rate_t _sample_rate,
@@ -51,17 +53,24 @@ audioFileDevice::audioFileDevice( const sample_rate_t _sample_rate,
 
 	if( m_outputFile.open( QFile::WriteOnly | QFile::Truncate ) == FALSE )
 	{
-		QMessageBox::critical( NULL,
-			exportProjectDialog::tr( "Could not open file" ),
-			exportProjectDialog::tr( "Could not open file %1 "
-						"for writing.\nPlease make "
-						"sure you have write-"
-						"permission to the file and "
-						"the directory containing the "
-						"file and try again!" ).arg(
-									_file ),
-					QMessageBox::Ok,
-					QMessageBox::NoButton );
+        QString warningMessage = exportProjectDialog::tr( 
+                            "Could not open file %1 "
+                            "for writing.\nPlease make "
+                            "sure you have write-"
+                            "permission to the file and "
+                            "the directory containing the "
+                            "file and try again!" ).arg( _file );
+        if( engine::hasGUI() ){
+            QMessageBox::critical( NULL,
+                exportProjectDialog::tr( "Could not open file" ),
+                warningMessage,
+                        QMessageBox::Ok,
+                        QMessageBox::NoButton );
+        }
+        else
+        {
+            qWarning() << warningMessage;
+        }
 	}
 }
 

src/core/main.cpp

@@ -499,6 +499,7 @@ int main( int argc, char * * argv )
 
 			// timer for progress-updates
 			QTimer * t = new QTimer( r );
+			r->setConsoleUpdateTimer(t);
 			r->connect( t, SIGNAL( timeout() ),
 					SLOT( updateConsoleProgress() ) );
 			t->start( 200 );

src/core/project_renderer.cpp

@@ -24,6 +24,7 @@
 
 
 #include <QtCore/QFile>
+#include <QTimer>
 
 #include "project_renderer.h"
 #include "song.h"
@@ -214,6 +215,14 @@ void projectRenderer::updateConsoleProgress( void )
 	char buf[80];
 	char prog[cols+1];
 
+    if( m_fileDev == NULL ){
+        qWarning("Error occured. Aborting render.");
+        m_consoleUpdateTimer->stop();
+        delete m_consoleUpdateTimer;
+        // TODO: kill the program. I can't figure out how to do it...
+        return;
+    }
+
 	for( int i = 0; i < cols; ++i )
 	{
 		prog[i] = ( i*100/cols <= m_progress ? '-' : ' ' );