moved to src/gui/

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@858 0778d3d1-df1d-0410-868b-ea421aaaa00d

src/gui/widgets/visualization_widget.cpp

@@ -0,0 +1,184 @@
+#ifndef SINGLE_SOURCE_COMPILE
+
+/*
+ * visualization_widget.cpp - widget for visualization of sound-data
+ *
+ * Copyright (c) 2005-2008 Tobias Doerffel <tobydox/at/users.sourceforge.net>
+ * 
+ * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+
+#include <QtCore/QTimer>
+#include <QtGui/QMouseEvent>
+#include <QtGui/QPainter>
+#include <QtGui/QPixmap>
+
+#include "visualization_widget.h"
+#include "embed.h"
+#include "engine.h"
+#include "templates.h"
+#include "tooltip.h"
+
+
+const int UPDATE_TIME = 1000 / 40;	// 40 fps
+
+
+
+visualizationWidget::visualizationWidget( const QPixmap & _bg, QWidget * _p,
+						visualizationTypes _vtype ) :
+	QWidget( _p ),
+	s_background( _bg ),
+	m_enabled( TRUE )
+{
+	setFixedSize( s_background.width(), s_background.height() );
+
+
+	const fpp_t frames = engine::getMixer()->framesPerPeriod();
+	m_buffer = new surroundSampleFrame[frames];
+
+	engine::getMixer()->clearAudioBuffer( m_buffer, frames );
+
+
+	m_updateTimer = new QTimer( this );
+	connect( m_updateTimer, SIGNAL( timeout() ), this, SLOT( update() ) );
+	if( m_enabled == TRUE )
+	{
+		m_updateTimer->start( UPDATE_TIME );
+	}
+
+	connect( engine::getMixer(), SIGNAL( nextAudioBuffer() ),
+					this, SLOT( updateAudioBuffer() ) );
+
+	toolTip::add( this, tr( "click to enable/disable visualization of "
+							"master-output" ) );
+}
+
+
+
+
+visualizationWidget::~visualizationWidget()
+{
+	delete[] m_buffer;
+}
+
+
+
+
+void visualizationWidget::updateAudioBuffer( void )
+{
+	if( m_enabled == TRUE )
+	{
+		engine::getMixer()->lock();
+		memcpy( m_buffer, engine::getMixer()->currentReadBuffer(),
+				engine::getMixer()->framesPerPeriod() *
+						BYTES_PER_SURROUND_FRAME );
+		engine::getMixer()->unlock();
+	}
+}
+
+
+
+
+void visualizationWidget::paintEvent( QPaintEvent * )
+{
+	QPainter p( this );
+
+	p.drawPixmap( 0, 0, s_background );
+
+	if( m_enabled == TRUE )
+	{
+		float master_output = engine::getMixer()->masterGain();
+		int w = width()-4;
+		float half_h = -( height() - 6 ) / 3.0 * master_output - 1;
+		int x_base = 2;
+		int y_base = height()/2 - 1;
+
+//		p.setClipRect( 2, 2, w, height()-4 );
+
+
+		const fpp_t frames =
+				engine::getMixer()->framesPerPeriod();
+		const float max_level = qMax<float>(
+				mixer::peakValueLeft( m_buffer, frames ),
+				mixer::peakValueRight( m_buffer, frames ) );
+
+		// and set color according to that...
+		if( max_level * master_output < 0.9 )
+		{
+			p.setPen( QColor( 96, 255, 96 ) );
+		}
+		else if( max_level * master_output < 1.0 )
+		{
+			p.setPen( QColor( 255, 192, 64 ) );
+		}
+		else
+		{
+			p.setPen( QColor( 255, 64, 64 ) );
+		}
+
+		const int xd = w / frames;
+
+		// now draw all that stuff
+		for( ch_cnt_t ch = 0; ch < DEFAULT_CHANNELS; ++ch )
+		{
+			int old_y = y_base +
+				(int)( mixer::clip( m_buffer[0][ch] )*half_h );
+			for( fpp_t frame = 0; frame < frames; ++frame )
+			{
+				int cur_y = y_base + (int)(
+					mixer::clip( m_buffer[frame][ch] ) *
+								half_h );
+				const int xp = x_base + frame * w / frames;
+				p.drawLine( xp, old_y, xp+xd, cur_y );
+				old_y = cur_y;
+			}
+		}
+
+	}
+}
+
+
+
+
+void visualizationWidget::mousePressEvent( QMouseEvent * _me )
+{
+	if( _me->button() == Qt::LeftButton )
+	{
+		m_enabled = !m_enabled;
+		if( m_enabled == TRUE )
+		{
+			m_updateTimer->start( UPDATE_TIME );
+		}
+		else
+		{
+			m_updateTimer->stop();
+			// we have to update (remove last waves),
+			// because timer doesn't do that anymore
+			update();
+		}
+	}
+}
+
+
+
+#include "visualization_widget.moc"
+
+
+#endif