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Mixer: rewrote processing chain of rendered audio buffers

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Until now, Mixer not only was responsible for rendering audio buffers
but also managed writing them to audio backend (through a FIFO) and
handled various quality related parameters.

All this functionality has been moved into the new AudioOutputContext
class. It glues together AudioBackend (formerly called AudioDevice),
global quality settings and the Mixer.

The AudioOutputContext class creates a FifoWriter which calls
Mixer::renderNextBuffer() and writes the output into the BufferFifo of
the AudioOutputContext it belongs to. The BufferFifo is read by the
according AudioBackend which belongs to the AudioOutputContext as well.

The AudioOutputContext also handles resampling in case the AudioBackend
wants the buffers in a different samplerate.

During this rewrite the Mixer class and the according source files have
been renamed from "mixer" to "Mixer". This results in small changes
all over LMMS' code base.
This commit is contained in:
Tobias Doerffel committed 2009-11-29 01:46:23 +01:00
1 parent 63cb220090
commit 20589f19e4
85 files changed
+1379 -1151
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src/gui/widgets/visualization_widget.cpp
+15 -15
View File
@@ -29,6 +29,7 @@
#include "visualization_widget.h"
#include "gui_templates.h"
#include "MainWindow.h"
#include "Mixer.h"
#include "embed.h"
#include "engine.h"
#include "tooltip.h"
@@ -40,16 +41,16 @@ visualizationWidget::visualizationWidget( const QPixmap & _bg, QWidget * _p,
visualizationTypes _vtype ) :
QWidget( _p ),
s_background( _bg ),
m_points( new QPointF[engine::getMixer()->framesPerPeriod()] ),
m_points( new QPointF[engine::mixer()->framesPerPeriod()] ),
m_active( false )
{
setFixedSize( s_background.width(), s_background.height() );
setAttribute( Qt::WA_OpaquePaintEvent, true );
const fpp_t frames = engine::getMixer()->framesPerPeriod();
const fpp_t frames = engine::mixer()->framesPerPeriod();
m_buffer = new sampleFrame[frames];
engine::getMixer()->clearAudioBuffer( m_buffer, frames );
engine::mixer()->clearAudioBuffer( m_buffer, frames );
toolTip::add( this, tr( "click to enable/disable visualization of "
@@ -72,12 +73,11 @@ void visualizationWidget::updateAudioBuffer()
{
if( !engine::getSong()->isExporting() )
{
engine::getMixer()->lock();
const surroundSampleFrame * c = engine::getMixer()->
currentReadBuffer();
const fpp_t fpp = engine::getMixer()->framesPerPeriod();
engine::mixer()->lock();
const surroundSampleFrame * c = engine::mixer()->currentReadBuffer();
const fpp_t fpp = engine::mixer()->framesPerPeriod();
memcpy( m_buffer, c, sizeof( surroundSampleFrame ) * fpp );
engine::getMixer()->unlock();
engine::mixer()->unlock();
}
}
@@ -92,7 +92,7 @@ void visualizationWidget::setActive( bool _active )
connect( engine::mainWindow(),
SIGNAL( periodicUpdate() ),
this, SLOT( update() ) );
connect( engine::getMixer(),
connect( engine::mixer(),
SIGNAL( nextAudioBuffer() ),
this, SLOT( updateAudioBuffer() ) );
}
@@ -101,7 +101,7 @@ void visualizationWidget::setActive( bool _active )
disconnect( engine::mainWindow(),
SIGNAL( periodicUpdate() ),
this, SLOT( update() ) );
disconnect( engine::getMixer(),
disconnect( engine::mixer(),
SIGNAL( nextAudioBuffer() ),
this, SLOT( updateAudioBuffer() ) );
// we have to update (remove last waves),
@@ -121,7 +121,7 @@ void visualizationWidget::paintEvent( QPaintEvent * )
if( m_active && !engine::getSong()->isExporting() )
{
float master_output = engine::getMixer()->masterGain();
float master_output = engine::mixer()->masterGain();
int w = width()-4;
const float half_h = -( height() - 6 ) / 3.0 * master_output - 1;
int x_base = 2;
@@ -131,10 +131,10 @@ void visualizationWidget::paintEvent( QPaintEvent * )
const fpp_t frames =
engine::getMixer()->framesPerPeriod();
engine::mixer()->framesPerPeriod();
const float max_level = qMax<float>(
mixer::peakValueLeft( m_buffer, frames ),
mixer::peakValueRight( m_buffer, frames ) );
Mixer::peakValueLeft( m_buffer, frames ),
Mixer::peakValueRight( m_buffer, frames ) );
// and set color according to that...
LmmsStyle::ColorRole levelColor;
@@ -165,7 +165,7 @@ void visualizationWidget::paintEvent( QPaintEvent * )
{
m_points[frame] = QPointF(
x_base + (float) frame * xd,
y_base + ( mixer::clip(
y_base + ( Mixer::clip(
m_buffer[frame][ch] ) *
half_h ) );
}