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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