请教一个FMOD的问题

Yonei · 发表于 2008-5-1 23:02:00

在做一个播放Mp3的程序(c#)，功能很简单，就是普通的播放，停止，暂停，向前，向后，还有一个TrackBar可以进行进度的调节。
写了一个clsMusic类专门负责FMOD相关的操作。
平时操作都正常，但是进行了channel.stop操作后再次播放时就有问题。
问题如下：
1）音乐自行播放结束或者点击停止(channel,stop)后,调节TrackBar后出现错误。
这个错误总出现在下面代码的“MC00027”位置。
2）以很高的频率进行，停止，播放操作（就是点击完播放后立刻点击停止，再立刻点击播放.....）
会出现错误。

以上两种问题返回的错误为如下三种，其中头两种出现频率高，第三种频率低。
FMOD_ERR_INVALID_HANDLE
FMOD_ERR_INVALID_PARAM
FMOD_ERR_OUTPUT_DRIVERCALL

贴出部分代码如下，希望能得到您的指点，先谢谢了！

下面代码中，
FmodRun() 为线程函数，其他函数都是通过窗口线程进行调用的。
有几个结构和方法是负责处理错误的，不影响您的阅读，也不影响程序。

/// <summary>
/// 初始化函数
/// </summary>
public ErrorParam FmodInit()
{
uint version = 0;
FMOD.RESULT result;
/*
Global Settings
*/
result = FMOD.Factory.System_Create(ref system);
ERRCHECK(result,ref ep, "MC00001", "FMOD0001");
if (ep.isError) return ep;
result = system.getVersion(ref version);
ERRCHECK(result, ref ep, "MC00002", "FMOD0001");
if (ep.isError) return ep;
if (version < FMOD.VERSION.number)
{
//MessageBox.Show("Error! You are using an old version of FMOD " + version.ToString("X") + ". This program requires " + FMOD.VERSION.number.ToString("X") + ".");
//Application.Exit();
clsLanguage.SetErrorParam(ref ep, "MC00006", "FMOD0002", version.ToString("X") + "," + FMOD.VERSION.number.ToString("X"));
return ep;
}
result = system.init(32, FMOD.INITFLAG.NORMAL, (IntPtr)null);
ERRCHECK(result, ref ep, "MC00003", "FMOD0001");
if (ep.isError) return ep;
result = system.createSound(m_strMusicPath, (FMOD.MODE._2D | FMOD.MODE.HARDWARE | FMOD.MODE.CREATESTREAM), ref sound);
//result = system.createSound(m_strMusicPath, FMOD.MODE.HARDWARE, ref sound);
ERRCHECK(result, ref ep, "MC00004", "FMOD0001");
if (ep.isError) return ep;
result = sound.getLength(ref musiclength, FMOD.TIMEUNIT.MS);
ERRCHECK(result, ref ep, "MC00021", "FMOD0001");
if (ep.isError) return ep;
//设置音乐条最大刻度
mct.SetSoundTrackBarLength((int)musiclength);
if (musicthread == null)
{
musicthread = new Thread(this.FmodRun);
}
isPlayMusic = true;
musicthread.Start();
clsLanguage.GetOKErrorParam(ref ep);
return ep;
}
/// <summary>
/// 线程执行函数
/// </summary>
private void FmodRun()
{
while (isPlayMusic)
{
uint ms = 0;
if (channel != null)
{
//result = channel.isPlaying(ref playing);
//if ((result != FMOD.RESULT.OK) && (result != FMOD.RESULT.ERR_INVALID_HANDLE))
//{
// ERRCHECK(result);
//}
//result = channel.getPaused(ref paused);
//if ((result != FMOD.RESULT.OK) && (result != FMOD.RESULT.ERR_INVALID_HANDLE))
//{
// ERRCHECK(result);
//}
result = channel.getPosition(ref ms, FMOD.TIMEUNIT.MS);
if ((result != FMOD.RESULT.OK) && (result != FMOD.RESULT.ERR_INVALID_HANDLE))
{
ERRCHECK(result, ref ep, "MC00011", "FMOD0001");
clsNotify.Instance().SendMessage(ep);
isPlayMusic = false;
return;
}
if (!mct.isSoundCtrl)
{
mct.SetSoundInfo((int)ms);
mct.SetSoundTrackValue((int)ms);
}
}
//statusBar.Text = "Time " + (ms / 1000 / 60) + ":" + (ms / 1000 % 60) + ":" + (ms / 10 % 100) + "/" + (lenms / 1000 / 60) + ":" + (lenms / 1000 % 60) + ":" + (lenms / 10 % 100) + " : " + (paused ? "Paused " : playing ? "Playing" : "Stopped");
if (system != null)
{
system.update();
}
Thread.Sleep(10);
}
}
/// <summary>
/// 设置音乐当前的位置，TrackBar调整数值后调用
/// </summary>
/// <param name="pos">要设置的位置</param>
public ErrorParam setPosition(uint pos)
{
if (channel != null)
{
bool isplay = false;
if (pos >= musiclength) pos = 0;
result = channel.isPlaying(ref isplay);
switch (result)
{
case FMOD.RESULT.OK:
if (isplay)
{
result = channel.setPosition(pos, FMOD.TIMEUNIT.MS);
if (result != FMOD.RESULT.OK)
{
ERRCHECK(result, ref ep, "MC00030", "FMOD0001");
return ep;
}
}
break;
case FMOD.RESULT.ERR_INVALID_HANDLE:
result = system.playSound(FMOD.CHANNELINDEX.FREE, sound, true, ref channel);
if (result != FMOD.RESULT.OK)
{
ERRCHECK(result, ref ep, "MC00027", "FMOD0001");
return ep;
}
result = channel.setPosition(pos, FMOD.TIMEUNIT.MS);
if (result != FMOD.RESULT.OK)
{
ERRCHECK(result, ref ep, "MC00029", "FMOD0001");
return ep;
}
break;
default:
ERRCHECK(result, ref ep, "MC00028", "FMOD0001");
return ep;
}
}
clsLanguage.GetOKErrorParam(ref ep);
return ep;
}
/// <summary>
/// 播放
/// </summary>
public ErrorParam Play()
{
if (channel != null)
{//已经播放了
bool paused = false;
bool isplay = false;
//获得播放/暂停状态
result = channel.isPlaying(ref isplay);
switch (result)
{
case FMOD.RESULT.OK:
if (isplay)
{//已经播放
result = channel.getPaused(ref paused);
if ((result != FMOD.RESULT.OK) && (result != FMOD.RESULT.ERR_INVALID_HANDLE))
{
ERRCHECK(result, ref ep, "MC00006", "FMOD0001");
return ep;
}
if (paused)
{//暂停
result = channel.setPaused(false);
if ((result != FMOD.RESULT.OK) && (result != FMOD.RESULT.ERR_INVALID_HANDLE))
{
ERRCHECK(result, ref ep, "MC00007", "FMOD0001");
return ep;
}
clsLanguage.GetOKErrorParam(ref ep);
return ep;
}
else
{//播放中
clsLanguage.GetOKErrorParam(ref ep);
return ep;
}
}
else
{//还未播放
result = system.playSound(FMOD.CHANNELINDEX.FREE, sound, true, ref channel);
if (result != FMOD.RESULT.OK)
{
ERRCHECK(result, ref ep, "MC00008", "FMOD0001");
return ep;
}
}
break;
case FMOD.RESULT.ERR_INVALID_HANDLE:
result = system.playSound(FMOD.CHANNELINDEX.FREE, sound, true, ref channel);
if (result != FMOD.RESULT.OK)
{
ERRCHECK(result, ref ep, "MC00026", "FMOD0001");
return ep;
}
break;
default:
ERRCHECK(result, ref ep, "MC00009", "FMOD0001");
return ep;
}
}
else
{//从未播放过
result = system.playSound(FMOD.CHANNELINDEX.FREE, sound, true, ref channel);
if (result != FMOD.RESULT.OK)
{
ERRCHECK(result, ref ep, "MC00010", "FMOD0001");
return ep;
}
}
int pos = mct.GetSoundTrackValue();
if (pos == (int)musiclength) pos = 0;
result = channel.setPosition((uint)pos, FMOD.TIMEUNIT.MS);
if (result != FMOD.RESULT.OK)
{
ERRCHECK(result, ref ep, "MC00024", "FMOD0001");
return ep;
}
result = channel.setPaused(false);
if (result != FMOD.RESULT.OK)
{
ERRCHECK(result, ref ep, "MC00025", "FMOD0001");
return ep;
}
clsLanguage.GetOKErrorParam(ref ep);
return ep;
}
/// <summary>
/// 停止播放
/// </summary>
/// <returns></returns>
public ErrorParam Stop()
{
if (channel != null)
{
result = channel.stop();
if ((result != FMOD.RESULT.OK) && (result != FMOD.RESULT.ERR_INVALID_HANDLE))
{
ERRCHECK(result, ref ep, "MC00023", "FMOD0001");
return ep;
}
}
clsLanguage.GetOKErrorParam(ref ep);
return ep;
}

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