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-/* alsaout.cc - class AlsaOut which represents an alsa client/port pair
- This file is part of LibKMid 0.9.5
- Copyright (C) 1997,98,99,2000 Antonio Larrosa Jimenez
- LibKMid's homepage : http://www.arrakis.es/~rlarrosa/libkmid.html
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public License
- along with this library; see the file COPYING.LIB. If not, write to
- the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
-
- Send comments and bug fixes to Antonio Larrosa <larrosa@kde.org>
-
-***************************************************************************/
-#ifndef _ALSAOUT_H
-#define _ALSAOUT_H
-
-#include <libkmid/midiout.h>
-
-struct snd_seq_event;
-typedef struct snd_seq_event snd_seq_event_t;
-
-/**
- * @short Sends MIDI events to a MIDI devices using ALSA
- * @version 0.9.5 17/01/2000
- * @author Antonio Larrosa Jimenez <larrosa@kde.org>
- */
-class AlsaOut : public MidiOut
-{
- friend class DeviceManager;
-
- protected:
-
-/**
- * @internal
- * Total number of devices.
- */
- int ndevs;
-
-/**
- * @internal
- * Total number of midi ports
- */
- int nmidiports;
-
- double count;
- double lastcount;
- double lasttime;
- double begintime;
- int m_rate;
-
-/**
- * @internal
- * A "constant" used to convert from milliseconds to the computer rate
- */
- double convertrate;
-
- long int time;
-
- virtual void seqbuf_dump (void);
- virtual void seqbuf_clean(void);
- void eventInit(snd_seq_event_t *ev);
- void eventSend(snd_seq_event_t *ep);
- void timerEventSend(int type);
-
- public:
-
- /**
- * Constructor. After constructing a MidiOut device, you must open it
- * (using openDev() ). Additionally you may want to initialize it
- * (with initDev() ),
- */
- AlsaOut(int d, int client=64, int port=0, const char *cname="", const char *pname="");
-
- /**
- * 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.
- */
- virtual ~AlsaOut();
-
- /**
- * Opens the device. This is generally called from DeviceManager , so you
- * shouldn't call this yourself (except if you created the MidiOut object
- * yourself.
- * @param sqfd a file descriptor of /dev/sequencer
- * @see closeDev
- * @see initDev
- */
- virtual void openDev (int sqfd);
-
- /**
- * Closes the device. It basically tells the device (the file descriptor)
- * is going to be closed.
- * @see openDev
- */
- virtual void closeDev ();
-
- /**
- * 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.
- */
- virtual void initDev ();
-
- /**
- * @return 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 :
- *
- * @li KMID_EXTERNAL_MIDI if it's a MidiOut object
- * @li KMID_SYNTH if it's a SynthOut object (as an AWE device)
- * @li KMID_FM if it's a FMOut object
- * @li KMID_GUS if it's a GUSOut object
- *
- * which are defined in midispec.h
- *
- * @see deviceName
- */
- int deviceType () const { return devicetype; }
-
- /**
- * Returns the name and type of this MIDI device.
- * @see deviceType
- */
- virtual const char * deviceName (void) const;
-
- /**
- * @internal
- */
- int rate (void) { return m_rate; }
-
- /**
- * See DeviceManager::noteOn()
- */
- virtual void noteOn ( uchar chn, uchar note, uchar vel );
-
- /**
- * See DeviceManager::noteOff()
- */
- virtual void noteOff ( uchar chn, uchar note, uchar vel );
-
- /**
- * See DeviceManager::keyPressure()
- */
- virtual void keyPressure ( uchar chn, uchar note, uchar vel );
-
- /**
- * See DeviceManager::chnPatchChange()
- */
- virtual void chnPatchChange ( uchar chn, uchar patch );
-
- /**
- * See DeviceManager::chnPressure()
- */
- virtual void chnPressure ( uchar chn, uchar vel );
-
- /**
- * See DeviceManager::chnPitchBender()
- */
- virtual void chnPitchBender ( uchar chn, uchar lsb, uchar msb );
-
- /**
- * See DeviceManager::chnController()
- */
- virtual void chnController ( uchar chn, uchar ctl , uchar v );
-
- /**
- * See DeviceManager::sysex()
- */
- virtual void sysex ( uchar *data,ulong size);
-
- /**
- * Mutes all notes being played on a given channel.
- */
- virtual void channelSilence ( uchar chn );
-
- /**
- * Mute or "unmute" a given channel .
- * @param chn channel to work on
- * @param 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.
- */
- virtual void channelMute ( uchar chn, int b );
-
- /**
- * 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.
- * @param 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.
- */
- virtual void setVolumePercentage ( int volper )
- { volumepercentage = volper; }
-
- /**
- * Returns true if everything's ok and false if there has been any problem
- */
- int ok (void)
- { if (seqfd<0) return 0;
- return (_ok>0);
- }
-
- virtual void wait (double ticks);
- virtual void tmrSetTempo (int v);
- virtual void tmrStart (int tpcn);
- virtual void tmrStart () { tmrStart(-1); }
- virtual void tmrStop ();
- virtual void tmrContinue ();
- /**
- * @internal
- * If i==1 syncronizes by cleaning the buffer instead of sending it (in fact,
- * this is what synchronizing really means :-) )
- */
- void sync (int i=0);
-
- class AlsaOutPrivate;
- AlsaOutPrivate *di;
-};
-
-#endif // _ALSAOUT_H
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