stopping a wave file

M

Mark Arteaga

I am trying to stop a wave file after I start playing it
using the Multimedia API. I succesfully P/Invoke the
following:

waveOutOpen - Open the wave file
waveOutPause - Pause the playing
waveOutRestart - Restart after pausing
waveOutWrite - Start the wave file

For some reason when I P/Invoke waveOutReset nothing
happens.

Here is the P/Invoke:
[DllImport ("coredll.dll", EntryPoint="waveOutReset",
SetLastError=true)]
public static extern int waveOutReset
(IntPtr hWaveOut);

The return value is 0 which means success but the wave
file does not stop playing. I pass the hWaveOut created
using waveOutOpen.

Does anyone have any ideas?
Mark
 
B

Brian

Are you playing Async or Sync? If you're playing Asyncronously (which is
what you're doing, or playing in another thread), you can play a null value
and it will stop playback... just pass in null instead of the filename to
the playsound method...
 
A

Alex Feinman [MVP]

It should work. One thing to check is that you do not call waveOutClose
before you receive final WOM_DONE
 
A

Alex Feinman [MVP]

Not PlaySound - waveOutXXX

Brian said:
Are you playing Async or Sync? If you're playing Asyncronously (which is
what you're doing, or playing in another thread), you can play a null value
and it will stop playback... just pass in null instead of the filename to
the playsound method...


Mark Arteaga said:
I am trying to stop a wave file after I start playing it
using the Multimedia API. I succesfully P/Invoke the
following:

waveOutOpen - Open the wave file
waveOutPause - Pause the playing
waveOutRestart - Restart after pausing
waveOutWrite - Start the wave file

For some reason when I P/Invoke waveOutReset nothing
happens.

Here is the P/Invoke:
[DllImport ("coredll.dll", EntryPoint="waveOutReset",
SetLastError=true)]
public static extern int waveOutReset
(IntPtr hWaveOut);

The return value is 0 which means success but the wave
file does not stop playing. I pass the hWaveOut created
using waveOutOpen.

Does anyone have any ideas?
Mark
Click to expand...
Click to expand...
 
M

Mark Arteaga

I'm using the OpenNetCF multimedia code. In
OpenNetCF.Multimedia.Audio.Player i have changed the Stop
() from:

/// <summary>
/// Stop Play
/// </summary>
public void Stop()
{
Core.waveOutReset(IntPtr.Zero);
m_playing = false;
}

to:

/// <summary>
/// Stop Play
/// </summary>
public void Stop()
{
try
{
CheckWaveError
(Core.waveOutReset(m_hWaveOut));
m_playing = false;
}
catch(Exception e)
{
throw e;
}

}

Primarly i just changed the waveOutReset param from
IntPtr.Zero to the waveOut handle created in waveOutOpen.
If I leave it as IntPtr.Zero it throws a "Invalid device
Handle" exception. Any ideas? I can send you a sample
project if you like.

Thx...Mark
-----Original Message-----
It should work. One thing to check is that you do not call waveOutClose
before you receive final WOM_DONE

I am trying to stop a wave file after I start playing it
using the Multimedia API. I succesfully P/Invoke the
following:

waveOutOpen - Open the wave file
waveOutPause - Pause the playing
waveOutRestart - Restart after pausing
waveOutWrite - Start the wave file

For some reason when I P/Invoke waveOutReset nothing
happens.

Here is the P/Invoke:
[DllImport ("coredll.dll", EntryPoint="waveOutReset",
SetLastError=true)]
public static extern int waveOutReset
(IntPtr hWaveOut);

The return value is 0 which means success but the wave
file does not stop playing. I pass the hWaveOut created
using waveOutOpen.

Does anyone have any ideas?
Mark
Click to expand...


.
Click to expand...
 
A

Alex Feinman [MVP]

Please do.

Mark Arteaga said:
I'm using the OpenNetCF multimedia code. In
OpenNetCF.Multimedia.Audio.Player i have changed the Stop
() from:

/// <summary>
/// Stop Play
/// </summary>
public void Stop()
{
Core.waveOutReset(IntPtr.Zero);
m_playing = false;
}

to:

/// <summary>
/// Stop Play
/// </summary>
public void Stop()
{
try
{
CheckWaveError
(Core.waveOutReset(m_hWaveOut));
m_playing = false;
}
catch(Exception e)
{
throw e;
}

}

Primarly i just changed the waveOutReset param from
IntPtr.Zero to the waveOut handle created in waveOutOpen.
If I leave it as IntPtr.Zero it throws a "Invalid device
Handle" exception. Any ideas? I can send you a sample
project if you like.

Thx...Mark
-----Original Message-----
It should work. One thing to check is that you do not call waveOutClose
before you receive final WOM_DONE

I am trying to stop a wave file after I start playing it
using the Multimedia API. I succesfully P/Invoke the
following:

waveOutOpen - Open the wave file
waveOutPause - Pause the playing
waveOutRestart - Restart after pausing
waveOutWrite - Start the wave file

For some reason when I P/Invoke waveOutReset nothing
happens.

Here is the P/Invoke:
[DllImport ("coredll.dll", EntryPoint="waveOutReset",
SetLastError=true)]
public static extern int waveOutReset
(IntPtr hWaveOut);

The return value is 0 which means success but the wave
file does not stop playing. I pass the hWaveOut created
using waveOutOpen.

Does anyone have any ideas?
Mark
Click to expand...


.
Click to expand...
Click to expand...
 
G

Geoff Schwab [MSFT]

Hi Mark,

Let me know if this is resolved. I just got through writing some sound code
for a P/Invoke library I am working on and waveOutReset works fine for me so
I may be able to help. The only caveat that I am aware of is that you
cannot simply restart it once you reset it, instead you have to call
waveOutWrite again. Stopping should work though.

--
Geoff Schwab
Program Manager
Excell Data Corporation
http://msdn.com/mobility

This posting is provided "AS IS" with no warranties, and confers no rights.

Alex Feinman said:
Please do.

Mark Arteaga said:
I'm using the OpenNetCF multimedia code. In
OpenNetCF.Multimedia.Audio.Player i have changed the Stop
() from:

/// <summary>
/// Stop Play
/// </summary>
public void Stop()
{
Core.waveOutReset(IntPtr.Zero);
m_playing = false;
}

to:

/// <summary>
/// Stop Play
/// </summary>
public void Stop()
{
try
{
CheckWaveError
(Core.waveOutReset(m_hWaveOut));
m_playing = false;
}
catch(Exception e)
{
throw e;
}

}

Primarly i just changed the waveOutReset param from
IntPtr.Zero to the waveOut handle created in waveOutOpen.
If I leave it as IntPtr.Zero it throws a "Invalid device
Handle" exception. Any ideas? I can send you a sample
project if you like.

Thx...Mark
-----Original Message-----
It should work. One thing to check is that you do not call waveOutClose
before you receive final WOM_DONE

I am trying to stop a wave file after I start playing it
using the Multimedia API. I succesfully P/Invoke the
following:

waveOutOpen - Open the wave file
waveOutPause - Pause the playing
waveOutRestart - Restart after pausing
waveOutWrite - Start the wave file

For some reason when I P/Invoke waveOutReset nothing
happens.

Here is the P/Invoke:
[DllImport ("coredll.dll", EntryPoint="waveOutReset",
SetLastError=true)]
public static extern int waveOutReset
(IntPtr hWaveOut);

The return value is 0 which means success but the wave
file does not stop playing. I pass the hWaveOut created
using waveOutOpen.

Does anyone have any ideas?
Mark


.
Click to expand...
Click to expand...
Click to expand...
 
M

Mark Arteaga

Can you send me an email address so I can send you a
sample project?
Thx, Mark
-----Original Message-----
Hi Mark,

Let me know if this is resolved. I just got through writing some sound code
for a P/Invoke library I am working on and waveOutReset works fine for me so
I may be able to help. The only caveat that I am aware of is that you
cannot simply restart it once you reset it, instead you have to call
waveOutWrite again. Stopping should work though.

--
Geoff Schwab
Program Manager
Excell Data Corporation
http://msdn.com/mobility

This posting is provided "AS IS" with no warranties, and confers no rights.

Please do.

I'm using the OpenNetCF multimedia code. In
OpenNetCF.Multimedia.Audio.Player i have changed the Stop
() from:

/// <summary>
/// Stop Play
/// </summary>
public void Stop()
{
Core.waveOutReset(IntPtr.Zero);
m_playing = false;
}

to:

/// <summary>
/// Stop Play
/// </summary>
public void Stop()
{
try
{
CheckWaveError
(Core.waveOutReset(m_hWaveOut));
m_playing = false;
}
catch(Exception e)
{
throw e;
}

}

Primarly i just changed the waveOutReset param from
IntPtr.Zero to the waveOut handle created in waveOutOpen.
If I leave it as IntPtr.Zero it throws a "Invalid device
Handle" exception. Any ideas? I can send you a sample
project if you like.

Thx...Mark
-----Original Message-----
It should work. One thing to check is that you do not
call waveOutClose
before you receive final WOM_DONE

message
I am trying to stop a wave file after I start playing it
using the Multimedia API. I succesfully P/Invoke the
following:

waveOutOpen - Open the wave file
waveOutPause - Pause the playing
waveOutRestart - Restart after pausing
waveOutWrite - Start the wave file

For some reason when I P/Invoke waveOutReset nothing
happens.

Here is the P/Invoke:
[DllImport ("coredll.dll", EntryPoint="waveOutReset",
SetLastError=true)]
public static extern int waveOutReset
(IntPtr hWaveOut);

The return value is 0 which means success but the wave
file does not stop playing. I pass the hWaveOut created
using waveOutOpen.

Does anyone have any ideas?
Mark


.
Click to expand...
Click to expand...


.
Click to expand...
 
A

Alex Feinman [MVP]

Geoff,
Never mind this. It was my code and my bug and I fixed it.

Geoff Schwab said:
Hi Mark,

Let me know if this is resolved. I just got through writing some sound code
for a P/Invoke library I am working on and waveOutReset works fine for me so
I may be able to help. The only caveat that I am aware of is that you
cannot simply restart it once you reset it, instead you have to call
waveOutWrite again. Stopping should work though.

--
Geoff Schwab
Program Manager
Excell Data Corporation
http://msdn.com/mobility

This posting is provided "AS IS" with no warranties, and confers no rights.

Alex Feinman said:
Please do.

Mark Arteaga said:
I'm using the OpenNetCF multimedia code. In
OpenNetCF.Multimedia.Audio.Player i have changed the Stop
() from:

/// <summary>
/// Stop Play
/// </summary>
public void Stop()
{
Core.waveOutReset(IntPtr.Zero);
m_playing = false;
}

to:

/// <summary>
/// Stop Play
/// </summary>
public void Stop()
{
try
{
CheckWaveError
(Core.waveOutReset(m_hWaveOut));
m_playing = false;
}
catch(Exception e)
{
throw e;
}

}

Primarly i just changed the waveOutReset param from
IntPtr.Zero to the waveOut handle created in waveOutOpen.
If I leave it as IntPtr.Zero it throws a "Invalid device
Handle" exception. Any ideas? I can send you a sample
project if you like.

Thx...Mark
-----Original Message-----
It should work. One thing to check is that you do not
call waveOutClose
before you receive final WOM_DONE

message
I am trying to stop a wave file after I start playing it
using the Multimedia API. I succesfully P/Invoke the
following:

waveOutOpen - Open the wave file
waveOutPause - Pause the playing
waveOutRestart - Restart after pausing
waveOutWrite - Start the wave file

For some reason when I P/Invoke waveOutReset nothing
happens.

Here is the P/Invoke:
[DllImport ("coredll.dll", EntryPoint="waveOutReset",
SetLastError=true)]
public static extern int waveOutReset
(IntPtr hWaveOut);

The return value is 0 which means success but the wave
file does not stop playing. I pass the hWaveOut created
using waveOutOpen.

Does anyone have any ideas?
Mark


.
Click to expand...
Click to expand...
Click to expand...
 

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