libkmid Library API Documentation

MidiOut Class Reference

External MIDI port output class . Sends MIDI events to external MIDI devices. More...

#include <midiout.h>

Inheritance diagram for MidiOut:

AlsaOut FMOut GUSOut SynthOut List of all members.

Public Methods

 MidiOut (int d=0)
 Constructor.

virtual ~MidiOut ()
 Destructor.

virtual void openDev (int sqfd)
 Opens the device.

virtual void closeDev ()
 Closes the device.

virtual void initDev ()
 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.

int deviceType () const
const char * deviceName (void) const
 Returns the name and type of this MIDI device.

void setMidiMapper (MidiMapper *map)
 Sets a MidiMapper object to be used to modify the midi events before sending them.

virtual void noteOn (uchar chn, uchar note, uchar vel)
 See DeviceManager::noteOn().

virtual void noteOff (uchar chn, uchar note, uchar vel)
 See DeviceManager::noteOff().

virtual void keyPressure (uchar chn, uchar note, uchar vel)
 See DeviceManager::keyPressure().

virtual void chnPatchChange (uchar chn, uchar patch)
 See DeviceManager::chnPatchChange().

virtual void chnPressure (uchar chn, uchar vel)
 See DeviceManager::chnPressure().

virtual void chnPitchBender (uchar chn, uchar lsb, uchar msb)
 See DeviceManager::chnPitchBender().

virtual void chnController (uchar chn, uchar ctl, uchar v)
 See DeviceManager::chnController().

virtual void sysex (uchar *data, ulong size)
 See DeviceManager::sysex().

void allNotesOff (void)
 Send a All Notes Off event to every channel.

virtual void channelSilence (uchar chn)
 Mutes all notes being played on a given channel.

virtual void channelMute (uchar chn, int a)
 Mute or "unmute" a given channel .

virtual void setVolumePercentage (int volper)
 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.

int ok (void)
 Returns true if everything's ok and false if there has been any problem.

const char * midiMapFilename ()
 Returns the path to the file where the current used MidiMapper object reads the configuration from, or an empty string if there's no MidiMapper.

void sync (int i=0)
 Sends the buffer to the device and returns when it's played, so you can synchronize XXX: sync should be virtual after next bic release.


Detailed Description

External MIDI port output class . Sends MIDI events to external MIDI devices.

This class is used to send midi events to external midi devices.

MidiOut is inherited by other MIDI devices classes (like SynthOut or FMOut) to support a common API.

In general, you don't want to use MidiOut directly, but within a DeviceManager object, which is the preferred way to generate music.

If you want to add support for other devices (I don't think there are any) you just have to create a class that inherits from MidiOut and create one object of your new class in DeviceManager::initManager().

Version:
0.9.5 17/01/2000
Author:
Antonio Larrosa Jimenez <larrosa@kde.org>

Definition at line 51 of file midiout.h.


Constructor & Destructor Documentation

MidiOut::MidiOut int    d = 0
 

Constructor.

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

Definition at line 46 of file midiout.cc.

MidiOut::~MidiOut   [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.

Definition at line 57 of file midiout.cc.

References closeDev().


Member Function Documentation

void MidiOut::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:
sqfd  a file descriptor of /dev/sequencer
See also:
closeDev , initDev

Reimplemented in AlsaOut, FMOut, GUSOut, and SynthOut.

Definition at line 63 of file midiout.cc.

Referenced by DeviceManager::openDev().

void MidiOut::closeDev   [virtual]
 

Closes the device.

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

See also:
openDev

Reimplemented in AlsaOut, FMOut, GUSOut, and SynthOut.

Definition at line 77 of file midiout.cc.

References ok().

Referenced by DeviceManager::closeDev(), DeviceManager::openDev(), and ~MidiOut().

void MidiOut::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 in AlsaOut, FMOut, GUSOut, and SynthOut.

Definition at line 86 of file midiout.cc.

References chnController(), chnPatchChange(), chnPitchBender(), chnPressure(), ok(), and sysex().

Referenced by DeviceManager::initDev().

int MidiOut::deviceType   const [inline]
 

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 :
  • KMID_EXTERNAL_MIDI if it's a MidiOut object
  • KMID_SYNTH if it's a SynthOut object (as an AWE device)
  • KMID_FM if it's a FMOut object
  • KMID_GUS if it's a GUSOut object
which are defined in midispec.h

See also:
deviceName

Reimplemented in AlsaOut.

Definition at line 139 of file midiout.h.

Referenced by deviceName(), and sync().

const char * MidiOut::deviceName void    const
 

Returns the name and type of this MIDI device.

See also:
deviceType

Reimplemented in AlsaOut.

Definition at line 280 of file midiout.cc.

References deviceType().

Referenced by DeviceManager::name().

void MidiOut::setMidiMapper MidiMapper   map
 

Sets a MidiMapper object to be used to modify the midi events before sending them.

Parameters:
map  the MidiMapper to use.
See also:
MidiMapper , midiMapFilename

Definition at line 107 of file midiout.cc.

void MidiOut::noteOn uchar    chn,
uchar    note,
uchar    vel
[virtual]
 

See DeviceManager::noteOn().

Reimplemented in AlsaOut, FMOut, GUSOut, and SynthOut.

Definition at line 113 of file midiout.cc.

References MidiMapper::channel(), MidiMapper::key(), and noteOff().

Referenced by DeviceManager::noteOn().

void MidiOut::noteOff uchar    chn,
uchar    note,
uchar    vel
[virtual]
 

See DeviceManager::noteOff().

Reimplemented in AlsaOut, FMOut, GUSOut, and SynthOut.

Definition at line 130 of file midiout.cc.

References MidiMapper::channel(), and MidiMapper::key().

Referenced by channelSilence(), DeviceManager::noteOff(), and noteOn().

void MidiOut::keyPressure uchar    chn,
uchar    note,
uchar    vel
[virtual]
 

See DeviceManager::keyPressure().

Reimplemented in AlsaOut, FMOut, GUSOut, and SynthOut.

Definition at line 140 of file midiout.cc.

References MidiMapper::channel(), and MidiMapper::key().

Referenced by DeviceManager::keyPressure().

void MidiOut::chnPatchChange uchar    chn,
uchar    patch
[virtual]
 

See DeviceManager::chnPatchChange().

Reimplemented in AlsaOut, FMOut, GUSOut, and SynthOut.

Definition at line 147 of file midiout.cc.

References MidiMapper::channel(), and MidiMapper::patch().

Referenced by DeviceManager::chnPatchChange(), and initDev().

void MidiOut::chnPressure uchar    chn,
uchar    vel
[virtual]
 

See DeviceManager::chnPressure().

Reimplemented in AlsaOut, FMOut, GUSOut, and SynthOut.

Definition at line 158 of file midiout.cc.

References MidiMapper::channel().

Referenced by DeviceManager::chnPressure(), and initDev().

void MidiOut::chnPitchBender uchar    chn,
uchar    lsb,
uchar    msb
[virtual]
 

See DeviceManager::chnPitchBender().

Reimplemented in AlsaOut, FMOut, GUSOut, and SynthOut.

Definition at line 166 of file midiout.cc.

References MidiMapper::channel(), and MidiMapper::pitchBender().

Referenced by DeviceManager::chnPitchBender(), and initDev().

void MidiOut::chnController uchar    chn,
uchar    ctl,
uchar    v
[virtual]
 

See DeviceManager::chnController().

Reimplemented in AlsaOut, FMOut, GUSOut, and SynthOut.

Definition at line 186 of file midiout.cc.

References MidiMapper::channel(), and MidiMapper::controller().

Referenced by allNotesOff(), DeviceManager::chnController(), and initDev().

void MidiOut::sysex uchar *    data,
ulong    size
[virtual]
 

See DeviceManager::sysex().

Reimplemented in AlsaOut, FMOut, GUSOut, and SynthOut.

Definition at line 205 of file midiout.cc.

Referenced by initDev(), and DeviceManager::sysEx().

void MidiOut::allNotesOff void   
 

Send a All Notes Off event to every channel.

Definition at line 220 of file midiout.cc.

References chnController(), and sync().

Referenced by DeviceManager::allNotesOff().

void MidiOut::channelSilence uchar    chn [virtual]
 

Mutes all notes being played on a given channel.

Reimplemented in AlsaOut.

Definition at line 230 of file midiout.cc.

References noteOff(), and sync().

Referenced by channelMute().

void MidiOut::channelMute uchar    chn,
int    a
[virtual]
 

Mute or "unmute" a given channel .

Parameters:
chn  channel to work on
b  if 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 in AlsaOut.

Definition at line 240 of file midiout.cc.

References channelSilence().

virtual void MidiOut::setVolumePercentage int    volper [inline, 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:
volper  is 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 in AlsaOut, and FMOut.

Definition at line 224 of file midiout.h.

Referenced by DeviceManager::setVolumePercentage().

int MidiOut::ok void    [inline]
 

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

Reimplemented in AlsaOut.

Definition at line 230 of file midiout.h.

Referenced by SynthOut::closeDev(), closeDev(), GUSOut::closeDev(), FMOut::closeDev(), SynthOut::initDev(), initDev(), GUSOut::initDev(), FMOut::initDev(), and DeviceManager::openDev().

const char * MidiOut::midiMapFilename  
 

Returns the path to the file where the current used MidiMapper object reads the configuration from, or an empty string if there's no MidiMapper.

Definition at line 275 of file midiout.cc.

References MidiMapper::filename().

void MidiOut::sync int    i = 0
 

Sends the buffer to the device and returns when it's played, so you can synchronize XXX: sync should be virtual after next bic release.

Reimplemented in AlsaOut.

Definition at line 294 of file midiout.cc.

References deviceType().

Referenced by allNotesOff(), and channelSilence().


The documentation for this class was generated from the following files:
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