class AlsaOut

Sends MIDI events to a MIDI devices using ALSA. More...

Definition#include <alsaout.h>
InheritsMidiOut
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Protected Methods

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Detailed Description

int ndevs

[protected]

Total number of devices.

int nmidiports

[protected]

Total number of midi ports

double convertrate

[protected]

A "constant" used to convert from milliseconds to the computer rate

 AlsaOut (int d, int client=64, int port=0, const char *cname="", const char *pname="")

Constructor. After constructing a MidiOut device, you must open it (using openDev() ). Additionally you may want to initialize it (with initDev() ),

AlsaOut ()

[virtual]

Destructor. It doesn't matter if you close the device (closeDev() ) before you destruct the object because in other case, it will be closed here.

void  openDev (int sqfd)

[virtual]

Opens the device. This is generally called from DeviceManager , so you shouldn't call this yourself (except if you created the MidiOut object yourself.

Parameters:
sqfda file descriptor of /dev/sequencer

See also: closeDev, initDev

Reimplemented from MidiOut

void  closeDev ()

[virtual]

Closes the device. It basically tells the device (the file descriptor) is going to be closed.

Reimplemented from MidiOut

void  initDev ()

[virtual]

Initializes the device sending generic standard midi events and controllers, such as changing the patches of each channel to an Acoustic Piano (000), setting the volume to a normal value, etc.

Reimplemented from MidiOut

int  deviceType ()

[const]

which are defined in midispec.h

Returns: the device type of the object. This is to identify the inherited class that a given object is polymorphed to. The returned value is one of these :

Reimplemented from MidiOut

const char *  deviceName (void)

[const virtual]

Returns the name and type of this MIDI device.

Reimplemented from MidiOut

int  rate (void)

Reimplemented from MidiOut

void  noteOn ( uchar chn, uchar note, uchar vel )

[virtual]

See DeviceManager::noteOn()

Reimplemented from MidiOut

void  noteOff ( uchar chn, uchar note, uchar vel )

[virtual]

See DeviceManager::noteOff()

Reimplemented from MidiOut

void  keyPressure ( uchar chn, uchar note, uchar vel )

[virtual]

See DeviceManager::keyPressure()

Reimplemented from MidiOut

void  chnPatchChange ( uchar chn, uchar patch )

[virtual]

See DeviceManager::chnPatchChange()

Reimplemented from MidiOut

void  chnPressure ( uchar chn, uchar vel )

[virtual]

See DeviceManager::chnPressure()

Reimplemented from MidiOut

void  chnPitchBender ( uchar chn, uchar lsb, uchar msb )

[virtual]

See DeviceManager::chnPitchBender()

Reimplemented from MidiOut

void  chnController ( uchar chn, uchar ctl , uchar v )

[virtual]

See DeviceManager::chnController()

Reimplemented from MidiOut

void  sysex ( uchar *data,ulong size)

[virtual]

See DeviceManager::sysex()

Reimplemented from MidiOut

void  channelSilence ( uchar chn )

[virtual]

Mutes all notes being played on a given channel.

Reimplemented from MidiOut

void  channelMute ( uchar chn, int a )

[virtual]

Mute or "unmute" a given channel .

Parameters:
chnchannel to work on
bif true, the device will ignore subsequent notes played on the chn channel, and mute all notes being played on it. If b is false, the channel is back to work.

Reimplemented from MidiOut

void  setVolumePercentage ( int volper )

[virtual]

Change all channel volume events multiplying it by this percentage correction Instead of forcing a channel to a fixed volume, this method allows to music to fade out even when it was being played softly.

Parameters:
volperis an integer value, where 0 is quiet, 100 is used to send an unmodified value, 200 play music twice louder than it should, etc.

Reimplemented from MidiOut

int  ok (void)

Returns true if everything's ok and false if there has been any problem

Reimplemented from MidiOut

void  sync (int i=0)

[virtual]

If i==1 syncronizes by cleaning the buffer instead of sending it (in fact, this is what syncronizing really means :-) )

Reimplemented from MidiOut