Source: midimapper.h

# Source: midimapper.h |
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    /*  midimapper.h  - The midi mapper object
        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., 59 Temple Place - Suite 330,
        Boston, MA 02111-1307, USA.

        Send comments and bug fixes to Antonio Larrosa

    ***************************************************************************/
    #ifndef _MIDIMAPPER_H
    #define _MIDIMAPPER_H

    #include
    #include

    #define KM_NAME_SIZE 30

    /**
     * A Midi Mapper class which defines the way MIDI events are translated
     * (or "mapped") to different ones. This way, when two MIDI devices "talk"
     * in a somehow different way, they can still communicate.
     *
     * When the user has an external keyboard that is not compatible with the
     * General Midi standard, he can use a MIDI mapper file to play files
     * as if the synthesizer was GM compatible.
     *
     * Please see the KMid documentation
     * ( http://www.arrakis.es/~rlarrosa/kmid.html ) for information on the
     * format of a MIDI mapper definition file, and how they work.
     *
     * I created this class because I had one of those non-GM keyboards,
     * so it can do everything I needed it to do for my keyboard to work
     * exactly as a GM synth, and a few more things. Currently, it's the most
     * featured MIDI mapper available.
     *
     * The usage of this class is quite simple, just create an object with
     * a correct filename in the constructor and then use this object as
     * parameter for @ref DeviceManager::setMidiMap().
     *
     * @short Midi Mapper
     * @version 0.9.5 17/01/2000
     * @author Antonio Larrosa Jimenez
     */
    class MidiMapper
    {
      private:
        class MidiMapperPrivate;
        MidiMapperPrivate *d;

        /**
         * @internal
         * Internal definition for Keymaps
         */
        struct Keymap
        {
          char name[KM_NAME_SIZE];
          uchar key[128];
          struct Keymap *next;
        };

        int	_ok;

        uchar	channelmap[16];
        /**
         * @internal
         * It's a pointer to the Keymap to use for a channel
         * This variable is used to get faster a given Keymap
         * The index is the real channel (after mapping it)
         */
        Keymap *channelKeymap[16];

        /**
         * @internal
         * It's -1 if the channel doesn't have a forced patch,
         * else indicates the patch to force in the channel.
         */
        int	channelPatchForced[16];

        uchar	patchmap[128];

        /**
         * @internal
         * Same as channelKeymap
         */
        Keymap *patchKeymap[128];

        /**
         * @internal
         * Real linked list of keymaps used around the class.
         */
        Keymap *keymaps;

        /**
         * @internal
         * Stores the name of the file from which the map was loaded
         */
        char *_filename;

        /**
         * @internal
         * Simulate expression events with volume events
         */
        int mapExpressionToVolumeEvents;

        /**
         * @internal
         * Map or not the Pitch Bender using @ref #pitchBenderRatio()
         */
        int mapPitchBender;

        /**
         * @internal
         * Indicates the ratio between the standard and the synthesizer's pitch
         * bender engine. The number sent to the synth is multiplied by this
         * and dividied by 4096. Thus if PitchBenderRatio is 4096, the synth's
         * pitch bender works as the standard one
         */
        int pitchBenderRatio;

        void getValue(char *s,char *v);
        void removeSpaces(char *s);
        int  countWords(char *s);
        void getWord(char *t,char *s,int w);
        // get from s the word in position  w and store it in t

        void deallocateMaps(void);
        Keymap *createKeymap(char *name,uchar use_same_note=0,uchar note=0);
        void readPatchmap(FILE *fh);
        void readKeymap(FILE *fh,char *first_line);
        void readChannelmap(FILE *fh);
        void readOptions(FILE *fh);

        void addKeymap(Keymap *newkm);
        Keymap *keymap(char *n);

      public:
        /**
         * Constructor. Loads a MIDI Mapper definition from a file.
         * @see #filename()
         */
        MidiMapper(const char *name);

        /**
         * Destructor.
         */
        ~MidiMapper();

        /**
         * Loads a MIDI Mapper definition file (you don't need to use this if you
         * used a correct filename in constructor).
         */
        void loadFile(const char *name);

        /**
         * Returns the status of the object.
         */
        int  ok(void) { return _ok; };

        /**
         * Returns the channel which chn should be mapped to.
         */
        uchar channel(uchar chn) { return channelmap[chn];};

        /**
         * Returns the patch which pgm used on channel chn should be mapped to.
         */
        uchar patch(uchar chn,uchar pgm);

        /**
         * Returns the key that key note playing a pgm patch on channel chn should
         * be mapped to.
         */
        uchar key(uchar chn,uchar pgm, uchar note);

        /**
         * Returns the value which the pitch bender on channel chn should be
         * mapped to.
         */
        void  pitchBender(uchar chn,uchar &lsb,uchar &msb);

        /**
         * Returns the value which a given controller and its value should
         * be mapped to when played on channel chn.
         */
        void  controller(uchar chn,uchar &ctl,uchar &v);

        /**
         * Returns the path and name of the file which the object loaded the
         * mapper from.
         */
        const char *filename(void);

    };

    #endif

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