mirror of
https://github.com/juce-framework/JUCE.git
synced 2026-01-10 23:44:24 +00:00
387 lines
14 KiB
C++
387 lines
14 KiB
C++
/*
|
|
==============================================================================
|
|
|
|
This is an automatically generated file created by the Jucer!
|
|
|
|
Creation date: 18 Sep 2009 9:46:49 pm
|
|
|
|
Be careful when adding custom code to these files, as only the code within
|
|
the "//[xyz]" and "//[/xyz]" sections will be retained when the file is loaded
|
|
and re-saved.
|
|
|
|
Jucer version: 1.12
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
The Jucer is part of the JUCE library - "Jules' Utility Class Extensions"
|
|
Copyright 2004-6 by Raw Material Software ltd.
|
|
|
|
==============================================================================
|
|
*/
|
|
|
|
//[Headers] You can add your own extra header files here...
|
|
//[/Headers]
|
|
|
|
#include "AudioDemoSynthPage.h"
|
|
|
|
|
|
//[MiscUserDefs]
|
|
|
|
//==============================================================================
|
|
/** Our demo synth sound is just a basic sine wave..
|
|
*/
|
|
class SineWaveSound : public SynthesiserSound
|
|
{
|
|
public:
|
|
SineWaveSound()
|
|
{
|
|
}
|
|
|
|
bool appliesToNote (const int /*midiNoteNumber*/) { return true; }
|
|
bool appliesToChannel (const int /*midiChannel*/) { return true; }
|
|
};
|
|
|
|
|
|
//==============================================================================
|
|
/** Our demo synth voice just plays a sine wave..
|
|
*/
|
|
class SineWaveVoice : public SynthesiserVoice
|
|
{
|
|
public:
|
|
SineWaveVoice()
|
|
: angleDelta (0.0),
|
|
tailOff (0.0)
|
|
{
|
|
}
|
|
|
|
bool canPlaySound (SynthesiserSound* sound)
|
|
{
|
|
return dynamic_cast <SineWaveSound*> (sound) != 0;
|
|
}
|
|
|
|
void startNote (const int midiNoteNumber, const float velocity,
|
|
SynthesiserSound* /*sound*/, const int /*currentPitchWheelPosition*/)
|
|
{
|
|
currentAngle = 0.0;
|
|
level = velocity * 0.15;
|
|
tailOff = 0.0;
|
|
|
|
double cyclesPerSecond = MidiMessage::getMidiNoteInHertz (midiNoteNumber);
|
|
double cyclesPerSample = cyclesPerSecond / getSampleRate();
|
|
|
|
angleDelta = cyclesPerSample * 2.0 * double_Pi;
|
|
}
|
|
|
|
void stopNote (const bool allowTailOff)
|
|
{
|
|
if (allowTailOff)
|
|
{
|
|
// start a tail-off by setting this flag. The render callback will pick up on
|
|
// this and do a fade out, calling clearCurrentNote() when it's finished.
|
|
|
|
if (tailOff == 0.0) // we only need to begin a tail-off if it's not already doing so - the
|
|
// stopNote method could be called more than once.
|
|
tailOff = 1.0;
|
|
}
|
|
else
|
|
{
|
|
// we're being told to stop playing immediately, so reset everything..
|
|
|
|
clearCurrentNote();
|
|
angleDelta = 0.0;
|
|
}
|
|
}
|
|
|
|
void pitchWheelMoved (const int /*newValue*/)
|
|
{
|
|
// can't be bothered implementing this for the demo!
|
|
}
|
|
|
|
void controllerMoved (const int /*controllerNumber*/, const int /*newValue*/)
|
|
{
|
|
// not interested in controllers in this case.
|
|
}
|
|
|
|
void renderNextBlock (AudioSampleBuffer& outputBuffer, int startSample, int numSamples)
|
|
{
|
|
if (angleDelta != 0.0)
|
|
{
|
|
if (tailOff > 0)
|
|
{
|
|
while (--numSamples >= 0)
|
|
{
|
|
const float currentSample = (float) (sin (currentAngle) * level * tailOff);
|
|
|
|
for (int i = outputBuffer.getNumChannels(); --i >= 0;)
|
|
*outputBuffer.getSampleData (i, startSample) += currentSample;
|
|
|
|
currentAngle += angleDelta;
|
|
++startSample;
|
|
|
|
tailOff *= 0.99;
|
|
|
|
if (tailOff <= 0.005)
|
|
{
|
|
clearCurrentNote();
|
|
|
|
angleDelta = 0.0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while (--numSamples >= 0)
|
|
{
|
|
const float currentSample = (float) (sin (currentAngle) * level);
|
|
|
|
for (int i = outputBuffer.getNumChannels(); --i >= 0;)
|
|
*outputBuffer.getSampleData (i, startSample) += currentSample;
|
|
|
|
currentAngle += angleDelta;
|
|
++startSample;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private:
|
|
double currentAngle, angleDelta, level, tailOff;
|
|
};
|
|
|
|
|
|
// This is an audio source that streams the output of our demo synth.
|
|
class SynthAudioSource : public AudioSource
|
|
{
|
|
public:
|
|
//==============================================================================
|
|
// this collects real-time midi messages from the midi input device, and
|
|
// turns them into blocks that we can process in our audio callback
|
|
MidiMessageCollector midiCollector;
|
|
|
|
// this represents the state of which keys on our on-screen keyboard are held
|
|
// down. When the mouse is clicked on the keyboard component, this object also
|
|
// generates midi messages for this, which we can pass on to our synth.
|
|
MidiKeyboardState& keyboardState;
|
|
|
|
// the synth itself!
|
|
Synthesiser synth;
|
|
|
|
//==============================================================================
|
|
SynthAudioSource (MidiKeyboardState& keyboardState_)
|
|
: keyboardState (keyboardState_)
|
|
{
|
|
// add some voices to our synth, to play the sounds..
|
|
for (int i = 4; --i >= 0;)
|
|
{
|
|
synth.addVoice (new SineWaveVoice()); // These voices will play our custom sine-wave sounds..
|
|
synth.addVoice (new SamplerVoice()); // and these ones play the sampled sounds
|
|
}
|
|
|
|
// and add some sounds for them to play...
|
|
setUsingSineWaveSound();
|
|
}
|
|
|
|
void setUsingSineWaveSound()
|
|
{
|
|
synth.clearSounds();
|
|
synth.addSound (new SineWaveSound());
|
|
}
|
|
|
|
void setUsingSampledSound()
|
|
{
|
|
synth.clearSounds();
|
|
|
|
WavAudioFormat wavFormat;
|
|
|
|
ScopedPointer<AudioFormatReader> audioReader (wavFormat.createReaderFor (new MemoryInputStream (BinaryData::cello_wav,
|
|
BinaryData::cello_wavSize,
|
|
false),
|
|
true));
|
|
|
|
BigInteger allNotes;
|
|
allNotes.setRange (0, 128, true);
|
|
|
|
synth.addSound (new SamplerSound ("demo sound",
|
|
*audioReader,
|
|
allNotes,
|
|
74, // root midi note
|
|
0.1, // attack time
|
|
0.1, // release time
|
|
10.0 // maximum sample length
|
|
));
|
|
}
|
|
|
|
void prepareToPlay (int /*samplesPerBlockExpected*/, double sampleRate)
|
|
{
|
|
midiCollector.reset (sampleRate);
|
|
|
|
synth.setCurrentPlaybackSampleRate (sampleRate);
|
|
}
|
|
|
|
void releaseResources()
|
|
{
|
|
}
|
|
|
|
void getNextAudioBlock (const AudioSourceChannelInfo& bufferToFill)
|
|
{
|
|
// the synth always adds its output to the audio buffer, so we have to clear it
|
|
// first..
|
|
bufferToFill.clearActiveBufferRegion();
|
|
|
|
// fill a midi buffer with incoming messages from the midi input.
|
|
MidiBuffer incomingMidi;
|
|
midiCollector.removeNextBlockOfMessages (incomingMidi, bufferToFill.numSamples);
|
|
|
|
// pass these messages to the keyboard state so that it can update the component
|
|
// to show on-screen which keys are being pressed on the physical midi keyboard.
|
|
// This call will also add midi messages to the buffer which were generated by
|
|
// the mouse-clicking on the on-screen keyboard.
|
|
keyboardState.processNextMidiBuffer (incomingMidi, 0, bufferToFill.numSamples, true);
|
|
|
|
// and now get the synth to process the midi events and generate its output.
|
|
synth.renderNextBlock (*bufferToFill.buffer, incomingMidi, 0, bufferToFill.numSamples);
|
|
}
|
|
};
|
|
|
|
//[/MiscUserDefs]
|
|
|
|
//==============================================================================
|
|
AudioDemoSynthPage::AudioDemoSynthPage (AudioDeviceManager& deviceManager_)
|
|
: deviceManager (deviceManager_),
|
|
keyboardComponent (0),
|
|
sineButton (0),
|
|
sampledButton (0),
|
|
liveAudioDisplayComp (0)
|
|
{
|
|
addAndMakeVisible (keyboardComponent = new MidiKeyboardComponent (keyboardState, MidiKeyboardComponent::horizontalKeyboard));
|
|
|
|
addAndMakeVisible (sineButton = new ToggleButton (String::empty));
|
|
sineButton->setButtonText (T("Use sine wave"));
|
|
sineButton->setRadioGroupId (321);
|
|
sineButton->addListener (this);
|
|
sineButton->setToggleState (true, false);
|
|
|
|
addAndMakeVisible (sampledButton = new ToggleButton (String::empty));
|
|
sampledButton->setButtonText (T("Use sampled sound"));
|
|
sampledButton->setRadioGroupId (321);
|
|
sampledButton->addListener (this);
|
|
|
|
addAndMakeVisible (liveAudioDisplayComp = new LiveAudioInputDisplayComp());
|
|
|
|
|
|
//[UserPreSize]
|
|
//[/UserPreSize]
|
|
|
|
setSize (600, 400);
|
|
|
|
//[Constructor] You can add your own custom stuff here..
|
|
deviceManager.addAudioCallback (liveAudioDisplayComp);
|
|
|
|
synthAudioSource = new SynthAudioSource (keyboardState);
|
|
audioSourcePlayer.setSource (synthAudioSource);
|
|
|
|
deviceManager.addAudioCallback (&audioSourcePlayer);
|
|
deviceManager.addMidiInputCallback (String::empty, &(synthAudioSource->midiCollector));
|
|
//[/Constructor]
|
|
}
|
|
|
|
AudioDemoSynthPage::~AudioDemoSynthPage()
|
|
{
|
|
//[Destructor_pre]. You can add your own custom destruction code here..
|
|
audioSourcePlayer.setSource (0);
|
|
deviceManager.removeMidiInputCallback (String::empty, &(synthAudioSource->midiCollector));
|
|
deviceManager.removeAudioCallback (&audioSourcePlayer);
|
|
deviceManager.removeAudioCallback (liveAudioDisplayComp);
|
|
//[/Destructor_pre]
|
|
|
|
deleteAndZero (keyboardComponent);
|
|
deleteAndZero (sineButton);
|
|
deleteAndZero (sampledButton);
|
|
deleteAndZero (liveAudioDisplayComp);
|
|
|
|
//[Destructor]. You can add your own custom destruction code here..
|
|
//[/Destructor]
|
|
}
|
|
|
|
//==============================================================================
|
|
void AudioDemoSynthPage::paint (Graphics& g)
|
|
{
|
|
//[UserPrePaint] Add your own custom painting code here..
|
|
//[/UserPrePaint]
|
|
|
|
g.fillAll (Colours::lightgrey);
|
|
|
|
//[UserPaint] Add your own custom painting code here..
|
|
//[/UserPaint]
|
|
}
|
|
|
|
void AudioDemoSynthPage::resized()
|
|
{
|
|
keyboardComponent->setBounds (8, 96, getWidth() - 16, 64);
|
|
sineButton->setBounds (16, 176, 150, 24);
|
|
sampledButton->setBounds (16, 200, 150, 24);
|
|
liveAudioDisplayComp->setBounds (8, 8, getWidth() - 16, 64);
|
|
//[UserResized] Add your own custom resize handling here..
|
|
//[/UserResized]
|
|
}
|
|
|
|
void AudioDemoSynthPage::buttonClicked (Button* buttonThatWasClicked)
|
|
{
|
|
//[UserbuttonClicked_Pre]
|
|
//[/UserbuttonClicked_Pre]
|
|
|
|
if (buttonThatWasClicked == sineButton)
|
|
{
|
|
//[UserButtonCode_sineButton] -- add your button handler code here..
|
|
synthAudioSource->setUsingSineWaveSound();
|
|
//[/UserButtonCode_sineButton]
|
|
}
|
|
else if (buttonThatWasClicked == sampledButton)
|
|
{
|
|
//[UserButtonCode_sampledButton] -- add your button handler code here..
|
|
synthAudioSource->setUsingSampledSound();
|
|
//[/UserButtonCode_sampledButton]
|
|
}
|
|
|
|
//[UserbuttonClicked_Post]
|
|
//[/UserbuttonClicked_Post]
|
|
}
|
|
|
|
|
|
|
|
//[MiscUserCode] You can add your own definitions of your custom methods or any other code here...
|
|
//[/MiscUserCode]
|
|
|
|
|
|
//==============================================================================
|
|
#if 0
|
|
/* -- Jucer information section --
|
|
|
|
This is where the Jucer puts all of its metadata, so don't change anything in here!
|
|
|
|
BEGIN_JUCER_METADATA
|
|
|
|
<JUCER_COMPONENT documentType="Component" className="AudioDemoSynthPage" componentName=""
|
|
parentClasses="public Component" constructorParams="AudioDeviceManager& deviceManager_"
|
|
variableInitialisers="deviceManager (deviceManager_)" snapPixels="8"
|
|
snapActive="1" snapShown="1" overlayOpacity="0.330000013" fixedSize="0"
|
|
initialWidth="600" initialHeight="400">
|
|
<BACKGROUND backgroundColour="ffd3d3d3"/>
|
|
<GENERICCOMPONENT name="" id="86605ec4f02c4320" memberName="keyboardComponent"
|
|
virtualName="" explicitFocusOrder="0" pos="8 96 16M 64" class="MidiKeyboardComponent"
|
|
params="keyboardState, MidiKeyboardComponent::horizontalKeyboard"/>
|
|
<TOGGLEBUTTON name="" id="d75101df45006ba9" memberName="sineButton" virtualName=""
|
|
explicitFocusOrder="0" pos="16 176 150 24" buttonText="Use sine wave"
|
|
connectedEdges="0" needsCallback="1" radioGroupId="321" state="1"/>
|
|
<TOGGLEBUTTON name="" id="2d687b4ac3dad628" memberName="sampledButton" virtualName=""
|
|
explicitFocusOrder="0" pos="16 200 150 24" buttonText="Use sampled sound"
|
|
connectedEdges="0" needsCallback="1" radioGroupId="321" state="0"/>
|
|
<GENERICCOMPONENT name="" id="7d70eb2617f56220" memberName="liveAudioDisplayComp"
|
|
virtualName="" explicitFocusOrder="0" pos="8 8 16M 64" class="LiveAudioInputDisplayComp"
|
|
params=""/>
|
|
</JUCER_COMPONENT>
|
|
|
|
END_JUCER_METADATA
|
|
*/
|
|
#endif
|