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preparation for sound card buffer change notification action

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This commit is contained in:
Volker Fischer 2009-03-07 21:13:52 +00:00
parent f38aa17ca6
commit 0308768ecb
1 changed files with 25 additions and 11 deletions
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36
windows/sound.cpp
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@ -74,8 +74,8 @@ void CSound::SetDev ( const int iNewDev )
if ( !strErrorMessage.empty() )
{
// loading and initializing the new driver failed, go back to original
// driver and display error message
// loading and initializing the new driver failed, go back to
// original driver and display error message
LoadAndInitializeDriver ( lCurDev );
Init ( iASIOBufferSizeStereo );
@ -88,18 +88,20 @@ void CSound::SetDev ( const int iNewDev )
{
if ( iNewDev != INVALID_SNC_CARD_DEVICE )
{
// This is the first time a driver is to be initialized, we first try
// to load the selected driver, if this fails, we try to load the first
// available driver in the system. If this fails, too, we throw an error
// that no driver is available -> it does not make sense to start the llcon
// software if no audio hardware is available
// This is the first time a driver is to be initialized, we first
// try to load the selected driver, if this fails, we try to load
// the first available driver in the system. If this fails, too, we
// throw an error that no driver is available -> it does not make
// sense to start the llcon software if no audio hardware is
// available
if ( !LoadAndInitializeDriver ( iNewDev ).empty() )
{
// loading and initializing the new driver failed, try to find at
// least one usable driver
// loading and initializing the new driver failed, try to find
// at least one usable driver
if ( !LoadAndInitializeFirstValidDriver() )
{
throw CGenErr ( "No usable ASIO audio device (driver) found." );
throw CGenErr ( "No usable ASIO audio device "
"(driver) found." );
}
}
}
@ -229,6 +231,7 @@ std::string CSound::CheckDeviceCapabilities()
}
}
// everything is ok, return empty string for "no error" case
return "";
}
@ -550,7 +553,18 @@ long CSound::asioMessages ( long selector, long value, void* message, double* op
{
case kAsioEngineVersion:
// return the supported ASIO version of the host application
ret = 2L;
ret = 2L; // Host ASIO implementation version, 2 or higher
break;
// both messages might be send if the buffer size changes
case kAsioBufferSizeChange:
case kAsioResetRequest:
// TODO reinit sound interface and check for new buffer size
// requires changes in client class, too
ret = 1L; // 1L if request is accepted or 0 otherwise
break;
}
return ret;