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play_sound: added an alpha for playing a sound

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This commit is contained in:
Veit Heller
2017-06-14 02:24:15 -04:00
parent 3f3aaf4fc2
commit 59c9e798e0
3 changed files with 303 additions and 0 deletions
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102
play_sound/Source/Main.cpp Normal file
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/*
==============================================================================
This file was auto-generated!
It contains the basic startup code for a Juce application.
==============================================================================
*/
#include "../JuceLibraryCode/JuceHeader.h"
Component* createMainContentComponent();
//==============================================================================
class play_soundApplication : public JUCEApplication
{
public:
//==============================================================================
play_soundApplication() {}
const String getApplicationName() override { return ProjectInfo::projectName; }
const String getApplicationVersion() override { return ProjectInfo::versionString; }
bool moreThanOneInstanceAllowed() override { return true; }
//==============================================================================
void initialise (const String& commandLine) override
{
// This method is where you should put your application's initialisation code..
mainWindow = new MainWindow (getApplicationName());
}
void shutdown() override
{
// Add your application's shutdown code here..
mainWindow = nullptr; // (deletes our window)
}
//==============================================================================
void systemRequestedQuit() override
{
// This is called when the app is being asked to quit: you can ignore this
// request and let the app carry on running, or call quit() to allow the app to close.
quit();
}
void anotherInstanceStarted (const String& commandLine) override
{
// When another instance of the app is launched while this one is running,
// this method is invoked, and the commandLine parameter tells you what
// the other instance's command-line arguments were.
}
//==============================================================================
/*
This class implements the desktop window that contains an instance of
our MainContentComponent class.
*/
class MainWindow : public DocumentWindow
{
public:
MainWindow (String name) : DocumentWindow (name,
Desktop::getInstance().getDefaultLookAndFeel()
.findColour (ResizableWindow::backgroundColourId),
DocumentWindow::allButtons)
{
setUsingNativeTitleBar (true);
setContentOwned (createMainContentComponent(), true);
setResizable (true, true);
centreWithSize (getWidth(), getHeight());
setVisible (true);
}
void closeButtonPressed() override
{
// This is called when the user tries to close this window. Here, we'll just
// ask the app to quit when this happens, but you can change this to do
// whatever you need.
JUCEApplication::getInstance()->systemRequestedQuit();
}
/* Note: Be careful if you override any DocumentWindow methods - the base
class uses a lot of them, so by overriding you might break its functionality.
It's best to do all your work in your content component instead, but if
you really have to override any DocumentWindow methods, make sure your
subclass also calls the superclass's method.
*/
private:
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainWindow)
};
private:
ScopedPointer<MainWindow> mainWindow;
};
//==============================================================================
// This macro generates the main() routine that launches the app.
START_JUCE_APPLICATION (play_soundApplication)

146
play_sound/Source/MainComponent.cpp Normal file
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#include "../JuceLibraryCode/JuceHeader.h"
enum State {
Done,
Start,
Play,
Stop
};
class MainContentComponent : public AudioAppComponent,
public ChangeListener,
public Button::Listener {
public:
MainContentComponent() : state(Done) {
addAndMakeVisible(&openbtn);
openbtn.setButtonText("Open");
openbtn.addListener(this);
addAndMakeVisible(&playbtn);
playbtn.setButtonText("Play");
playbtn.addListener(this);
playbtn.setColour(TextButton::buttonColourId, Colours::green);
playbtn.setEnabled(false);
addAndMakeVisible (&stopbtn);
stopbtn.setButtonText("Stop");
stopbtn.addListener(this);
stopbtn.setColour(TextButton::buttonColourId, Colours::red);
stopbtn.setEnabled(false);
formatManager.registerBasicFormats();
transportSource.addChangeListener(this);
setSize(300, 200);
setAudioChannels(0, 2);
}
~MainContentComponent() {
shutdownAudio();
}
void changeListenerCallback(ChangeBroadcaster* source) override {
if (source == &transportSource) {
if (transportSource.isPlaying()) changeState(Play);
else changeState(Done);
}
}
void prepareToPlay(int s, double r) override {
transportSource.prepareToPlay(s, r);
}
void getNextAudioBlock(const AudioSourceChannelInfo& buf) override {
if (readerSource == nullptr) {
buf.clearActiveBufferRegion();
return;
}
transportSource.getNextAudioBlock(buf);
}
void releaseResources() override {
transportSource.releaseResources();
}
void paint (Graphics& g) override {
g.fillAll(getLookAndFeel().findColour(ResizableWindow::backgroundColourId));
}
void resized() override {
openbtn.setBounds(10, 10, getWidth() - 20, 20);
playbtn.setBounds(10, 40, getWidth() - 20, 20);
stopbtn.setBounds (10, 70, getWidth() - 20, 20);
}
private:
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainContentComponent)
TextButton openbtn;
TextButton playbtn;
TextButton stopbtn;
AudioFormatManager formatManager;
ScopedPointer<AudioFormatReaderSource> readerSource;
AudioTransportSource transportSource;
State state;
void changeState(State news) {
if (state == news) return;
state = news;
switch (state) {
case Done:
stopbtn.setEnabled(false);
playbtn.setEnabled(true);
transportSource.setPosition (0.0);
break;
case Start:
playbtn.setEnabled (false);
transportSource.start();
break;
case Play:
stopbtn.setEnabled (true);
break;
case Stop:
transportSource.stop();
break;
}
}
void buttonClicked(Button* button) override {
if (button == &openbtn) openClicked();
if (button == &playbtn) playClicked();
if (button == &stopbtn) stopClicked();
}
void openClicked() {
FileChooser chooser ("Select a file", File::nonexistent, "*.wav");
if (!chooser.browseForFileToOpen()) return;
File file(chooser.getResult());
AudioFormatReader* reader = formatManager.createReaderFor(file);
if (reader == nullptr) return;
ScopedPointer<AudioFormatReaderSource> news = new AudioFormatReaderSource(reader, true);
transportSource.setSource(news, 0, nullptr, reader->sampleRate);
playbtn.setEnabled(true);
readerSource = news.release();
}
void playClicked() {
changeState(Start);
}
void stopClicked() {
changeState(Stop);
}
};
Component* createMainContentComponent() { return new MainContentComponent(); }

55
play_sound/play_sound.jucer Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<JUCERPROJECT id="joxJaa" name="play_sound" displaySplashScreen="1" reportAppUsage="1"
splashScreenColour="Dark" projectType="guiapp" version="1.0.0"
bundleIdentifier="com.yourcompany.play_sound" includeBinaryInAppConfig="1"
jucerVersion="5.0.2">
<MAINGROUP id="oEPln8" name="play_sound">
<GROUP id="{2C5BA03F-65A6-A82B-9598-6E4AA10B7D94}" name="Source">
<FILE id="WUGBJa" name="MainComponent.cpp" compile="1" resource="0"
file="Source/MainComponent.cpp"/>
<FILE id="KOEbvY" name="Main.cpp" compile="1" resource="0" file="Source/Main.cpp"/>
</GROUP>
</MAINGROUP>
<EXPORTFORMATS>
<XCODE_MAC targetFolder="Builds/MacOSX">
<CONFIGURATIONS>
<CONFIGURATION name="Debug" isDebug="1" optimisation="1" targetName="play_sound"/>
<CONFIGURATION name="Release" isDebug="0" optimisation="3" targetName="play_sound"/>
</CONFIGURATIONS>
<MODULEPATHS>
<MODULEPATH id="juce_core" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_events" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_graphics" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_data_structures" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_gui_basics" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_gui_extra" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_cryptography" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_video" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_opengl" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_audio_basics" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_audio_devices" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_audio_formats" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_audio_processors" path="../../../JUCE/modules"/>
<MODULEPATH id="juce_audio_utils" path="../../../JUCE/modules"/>
</MODULEPATHS>
</XCODE_MAC>
</EXPORTFORMATS>
<MODULES>
<MODULE id="juce_audio_basics" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_audio_devices" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_audio_formats" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_audio_processors" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_audio_utils" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_core" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_cryptography" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_data_structures" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_events" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_graphics" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_gui_basics" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_gui_extra" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_opengl" showAllCode="1" useLocalCopy="0"/>
<MODULE id="juce_video" showAllCode="1" useLocalCopy="0"/>
</MODULES>
<JUCEOPTIONS/>
</JUCERPROJECT>