added backend for autoscale

dialogs/speeddialog.cpp

@@ -35,6 +35,6 @@ SpeedDialog::SpeedDialog(QWidget *parent) : QDialog(parent) {
 	reverseLayout->addWidget(reverse);
 	layout->addLayout(reverseLayout, 3, 0, 2, 1);
 
-	QDialogButtonBox* buttonBox = new QDialogButtonBox(this, QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
+	QDialogButtonBox* buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
 	layout->addWidget(buttonBox, 4, 0, 2, 1);
 }

mainwindow.cpp

@@ -426,8 +426,7 @@ void MainWindow::on_actionProject_triggered()
         project_url.clear();
         panel_project->new_project();
 		updateTitle("");
-        panel_timeline->redraw_all_clips(false);
-		sequence->playhead = 0;
+		panel_timeline->redraw_all_clips(false);
     }
 }
 

project/clip.cpp

@@ -29,7 +29,8 @@ Clip::Clip(Sequence* s) :
 	pkt(new AVPacket()),
 	replaced(false),
 	texture(NULL),
-	fbo(NULL)
+	fbo(NULL),
+	autoscale(false)
 {
     reset();
 }

project/clip.h

@@ -103,6 +103,7 @@ struct Clip
 	QOpenGLFramebufferObject** fbo;
     QOpenGLTexture* texture;
     long texture_frame;
+	bool autoscale;
 
     // audio playback variables
 	SwrContext* swr_ctx;

ui/viewerwidget.cpp

@@ -302,6 +302,13 @@ GLuint ViewerWidget::compose_sequence(Clip* nest, bool render_audio) {
 					coords.textureTopLeftY = coords.textureTopRightY = coords.textureTopLeftX = coords.textureBottomLeftX = 0;
 					coords.textureBottomLeftY = coords.textureBottomRightY = coords.textureTopRightX = coords.textureBottomRightX = 1.0;					
 
+					if (c->autoscale && (video_width != s->width || video_height != s->height)) {
+						double width_multiplier = (double) s->width / (double) video_width;
+						double height_multiplier = (double) s->height / (double) video_height;
+						double scale_multiplier = qMin(width_multiplier, height_multiplier);
+						glScalef(scale_multiplier, scale_multiplier, 1);
+					}
+
 					// EFFECT CODE START
 					for (int j=0;j<c->effects.size();j++) {
 						Effect* e = c->effects.at(j);