Work/midiseq/midiout.cpp

#include <midiseq/midiout.hpp>
#include <common/mmsystem.hpp>
#include <common/string.hpp>
#include <common/block.hpp>

/*
* Constructor
* @param deviceName - name of device to open, if null then opens default device
* @return return
*/
MIDIOutputDevice::MIDIOutputDevice(const String &deviceName)
: mHasDevice(false), mMIDIDeviceID(MIDIMAPPER)
{
  if(deviceName.isNull())openDevice();
	else openDevice(deviceName);
}

/*
* openDevice - opens the default MIDI output device
* @param none 
* @return bool true - if device was opened, false otherwise
*/
bool MIDIOutputDevice::openDevice(void)
{
	closeDevice();
	if(!::midiOutGetNumDevs())return false;
	if(::midiOutOpen(&mhMIDIOutput,mMIDIDeviceID,0,0,0))return false;
	hasDevice(TRUE);
  getDeviceCapabilities();
	return true;
}

/*
* openDevice - opens the named MIDI output device
* @param deviceName - Name of the device to open
* @return bool true - if device was opened, false otherwise
*/
bool MIDIOutputDevice::openDevice(const String &deviceName)
{
  Block<String> deviceNames;

  closeDevice();
	if(deviceName=="MIDIMAPPER")
	{
	  mMIDIDeviceID=MIDIMAPPER;
		return openDevice();
	}
  if(!getDeviceNames(deviceNames))return false;
	for(int index=0;index<deviceNames.size();index++)
	{
	  if(deviceNames[index]==deviceName)break;
	}
	if(index>=deviceNames.size())return false;
	return openDevice(index);
}

/*
* openDevice - opens the device with the given id
* @param deviceID - The ID of the device to open
* @return bool true - if device was opened, false otherwise
*/
bool MIDIOutputDevice::openDevice(int deviceID)
{
  UINT numDevs;

	closeDevice();
	if(-1==deviceID)
	{
	  mMIDIDeviceID=MIDIMAPPER;
		return openDevice();
	}
	if(!(numDevs=::midiOutGetNumDevs()))return false;
	if(deviceID>=numDevs)return false;
	if(::midiOutOpen(&mhMIDIOutput,deviceID,0,0,0))return false;
	mMIDIDeviceID=deviceID;
	hasDevice(true);
  getDeviceCapabilities();
	return true;
}

/*
* closeDevice - closes the device
* @param none
* @return none
*/
void MIDIOutputDevice::closeDevice(void)
{
	if(!hasDevice())return;
  ::midiOutReset(mhMIDIOutput);
	::midiOutClose(mhMIDIOutput);
  hasDevice(false);
	mMIDIDeviceID=MIDIMAPPER;
}

/*
* getDeviceCapabilities - Gets Caps for current device
* @param none
* @return bool  true=success, false otherwise
*/
bool MIDIOutputDevice::getDeviceCapabilities(void)
{
	if(!hasDevice())return false;
	::memset(&mMIDIOutDevCaps,0,sizeof(MIDIOutCaps));
	if(::midiOutGetDevCaps(mMIDIDeviceID,mMIDIOutDevCaps,sizeof(MIDIOutCaps)))return false;
  return true;
}

/*
* getNumDevs - Get number of devices in system
* @param none
* @return UINT number of devices in system (this is related to device ID)
*/
UINT MIDIOutputDevice::getNumDevs(void)
{
  return midiOutGetNumDevs();
}

/*
* getDeviceNames - Get names of devices currently in system
* @param Block<String> & that will be populated with the device names
* @return bool true if success.
*/
bool MIDIOutputDevice::getDeviceNames(Block<String> &deviceNames)
{
  UINT numDevs;
  MIDIOutCaps midiOutCaps;

  deviceNames.remove();
	numDevs=getNumDevs();
  for(int index=0;index<numDevs;index++)
	{
	  ::memset(&midiOutCaps,0,sizeof(midiOutCaps));
	  if(::midiOutGetDevCaps(index,&midiOutCaps.getMIDIOUTCAPS(),sizeof(midiOutCaps)))break;
		deviceNames.insert(&midiOutCaps.productName());
	}
	return deviceNames.size()?true:false;
}

/*
* midiEvent - Put a MIDI event to the current device
* @param PureEvent - an event
* @return bool true if success.
*/
bool MIDIOutputDevice::midiEvent(const PureEvent &somePureEvent)
{
	union{DWORD dwData;BYTE bData[4];}unionData;

//  String str=(String)((PureEvent&)somePureEvent)+String("\n");;
//	::OutputDebugString(str.str());
	if(!hasDevice())return false;
	unionData.bData[0]=somePureEvent.eventType();
	unionData.bData[1]=somePureEvent.firstData();
	unionData.bData[2]=somePureEvent.secondData();
	unionData.bData[3]=0;
	if(::midiOutShortMsg(mhMIDIOutput,unionData.dwData))return false;
  return true;
}

/*
* getLeftVolume - Get left volume level of current device
* @param none
* @return unsigned short - volume level
*/

WORD MIDIOutputDevice::getLeftVolume(void)const
{
	DWORD volumeLevel;

	if(!hasDevice())return FALSE;
	if(!mMIDIOutDevCaps.hasVolume())return FALSE;
#if WINVER>=0x0400
	if(::midiOutGetVolume(mhMIDIOutput,&volumeLevel))return FALSE;
#else
	if(::midiOutGetVolume(mMIDIDeviceID,&volumeLevel))return FALSE;
#endif
  return LOWORD(volumeLevel);
}

/*
* getRightVolume - Get right volume level of current device
* @param none
* @return unsigned short - volume level
*/

WORD MIDIOutputDevice::getRightVolume(void)const
{
	DWORD volumeLevel;
  
	if(!hasDevice())return FALSE;
	if(!mMIDIOutDevCaps.hasVolume())return FALSE;
#if WINVER>=0x0400
	if(::midiOutGetVolume(mhMIDIOutput,&volumeLevel))return FALSE;
#else
  if(::midiOutGetVolume(mMIDIDeviceID,&volumeLevel))return FALSE;
#endif
	if(!mMIDIOutDevCaps.hasLeftRightVolume())return LOWORD(volumeLevel);
  return HIWORD(volumeLevel);
}

/*
* setRightVolume - Set right volume level of current device
* @param unsigned short volume level
* @return bool true is success
*/

bool MIDIOutputDevice::setRightVolume(WORD volumeRight)
{
	DWORD volumeLevel;

	if(!hasDevice())return false;
	if(!mMIDIOutDevCaps.hasVolume())return false;
	volumeLevel=volumeRight;
	if(mMIDIOutDevCaps.hasLeftRightVolume())
	{
		volumeLevel<<=8;
		volumeLevel+=getLeftVolume();
	}
#if WINVER>=0x0400
	if(::midiOutSetVolume(mhMIDIOutput,volumeLevel))return false;
#else
  if(::midiOutSetVolume(mMIDIDeviceID,volumeLevel))return false;
#endif
  return true;
}

/*
* setLeftVolume - Set left volume level of current device
* @param unsigned short volume level
* @return bool true is success
*/

bool MIDIOutputDevice::setLeftVolume(WORD volumeLeft)
{
	DWORD volumeLevel(0L);

	if(!hasDevice())return false;
	if(!mMIDIOutDevCaps.hasVolume())return false;
	if(mMIDIOutDevCaps.hasLeftRightVolume())
	{
		volumeLevel=getRightVolume();
    volumeLevel<<=8;
	}
	volumeLevel+=volumeLeft;
#if WINVER>=0x0400
	if(::midiOutSetVolume(mhMIDIOutput,volumeLevel))return false;
#else
  if(::midiOutSetVolume(mMIDIDeviceID,volumeLevel))return false;
#endif
	return TRUE;
}