我是一个团队的一员,正在为学校的游戏项目工作。我需要设置一个单例类来处理游戏音频。我们使用QT实现移动端的可移植性,可能还包括安卓手机。我们决定使用phonon来管理游戏音频。我对此非常陌生,第一次使用QT并且也是新手级别的游戏编程。
音频系统应该能够同时处理多个声音。至少要能够处理背景音乐和音效。音效将通过信号连接到插槽。
以下是我的代码:
/**************audiosystem.h***/
class AudioSystem : public QWidget
{
Q_OBJECT
public:
static AudioSystem *instance();
void setMusicFile(const QString &filename);
signals:
bool finishedMusic(); ///< For looping
public slots:
void playMusic(); ///< BG music triggered at Level start?
void stopMusic(); ///< Triggered by level finish
void click_sound(); ///< Menu button clicks
void step_sound(); ///< Other character sounds
void wall_sound(); ///< Hitting the wall or collision sound
void jump_sound(); ///< Jumping sound
void sound(int); ///< Level specific custom sounds
private:
// Singleton - constructors made private
AudioSystem(QWidget *parent = 0);
~AudioSystem();
AudioSystem(const AudioSystem &);
AudioSystem& operator=(const AudioSystem &);
static AudioSystem *m_Instance;
// media objects
Phonon::MediaObject *m_BgPlayer;
Phonon::MediaObject *m_EffectPlayer;
// audio sinks
Phonon::AudioOutput *m_BgAudioOutput;
Phonon::AudioOutput *m_EffectAudioOutput;
// audio paths
Phonon::Path m_BgAudioPath, m_EffAudioPath;
};
/****** audiosystem.cpp**/
AudioSystem* AudioSystem::m_Instance = 0;
AudioSystem* AudioSystem::instance()
{
if (!m_Instance)
{
m_Instance = new AudioSystem();
}
return m_Instance;
}
AudioSystem::AudioSystem(QWidget *parent) :
QWidget(parent)
{
// create new instance of player and audio sinks then connect with paths
m_BgPlayer = new Phonon::MediaObject(this);
m_EffectPlayer = new Phonon::MediaObject(this);
m_BgAudioOutput = new Phonon::AudioOutput(Phonon::MusicCategory, this);
m_EffectAudioOutput= new Phonon::AudioOutput(Phonon::MusicCategory, this);
m_BgAudioPath = Phonon::createPath(m_BgPlayer, m_BgAudioOutput);
m_EffAudioPath = Phonon::createPath(m_EffectPlayer, m_EffectAudioOutput);
}
void AudioSystem::setMusicFile(const QString &filename)
{
m_BgPlayer->setCurrentSource(QString(filename));
}
void AudioSystem::playMusic()
{
m_BgPlayer->play();
}
void AudioSystem::stopMusic()
{
m_BgPlayer->stop();
}
void AudioSystem::click_sound()
{
m_EffectPlayer->setCurrentSource(QString(":/button.wav"));
m_EffectPlayer->play();
}
........................... etc
typical implementation:
AudioSystem::instance()->playMusic
AudioSystem::instance(), SLOT(click_sound())
我已经设置好的代码在一个简单的mainwindow中看起来工作正常,但是当我放到我们代码中的任何位置时它就无法工作。这里有什么我遗漏的吗?
完整项目:git://gitorious.org/gamecs340project/gamecs340project.git