175 lines
4.2 KiB
C
Executable File
175 lines
4.2 KiB
C
Executable File
/*
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Copyright (C) 1994-1995 Apogee Software, Ltd.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef ___AL_MIDI_H
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#define ___AL_MIDI_H
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#define NO_ADLIB_DETECTION "NOAL"
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#define STEREO_DETUNE 5
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#define lobyte( num ) ( ( unsigned )*( ( char * )&( num ) ) )
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#define hibyte( num ) ( ( unsigned )*( ( ( char * )&( num ) ) + 1 ) )
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#define AL_VoiceNotFound -1
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#define alFreqH 0xb0
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#define alEffects 0xbd
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/* Number of slots for the voices on the chip */
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#define NumChipSlots 18
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#define NUM_VOICES 9
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#define NUM_CHANNELS 16
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#define NOTE_ON 0x2000 /* Used to turn note on or toggle note */
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#define NOTE_OFF 0x0000
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#define MAX_VELOCITY 0x7f
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#define MAX_OCTAVE 7
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#define MAX_NOTE ( MAX_OCTAVE * 12 + 11 )
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#define FINETUNE_MAX 31
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#define FINETUNE_RANGE ( FINETUNE_MAX + 1 )
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#define PITCHBEND_CENTER 1638400
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#define note_off 0x80
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#define note_on 0x90
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#define poly_aftertouch 0xa0
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#define control_change 0xb0
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#define program_chng 0xc0
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#define channel_aftertouch 0xd0
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#define pitch_wheel 0xe0
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#define MIDI_VOLUME 7
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#define MIDI_PAN 10
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#define MIDI_DETUNE 94
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#define MIDI_ALL_NOTES_OFF 0x7B
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#define MIDI_RESET_ALL_CONTROLLERS 0x79
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#define MIDI_RPN_MSB 100
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#define MIDI_RPN_LSB 101
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#define MIDI_DATAENTRY_MSB 6
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#define MIDI_DATAENTRY_LSB 38
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#define MIDI_PITCHBEND_RPN 0
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enum cromatic_scale
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{
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C = 0x157,
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C_SHARP = 0x16B,
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D_FLAT = 0x16B,
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D = 0x181,
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D_SHARP = 0x198,
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E_FLAT = 0x198,
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E = 0x1B0,
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F_FLAT = 0x1B0,
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E_SHARP = 0x1CA,
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F = 0x1CA,
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F_SHARP = 0x1E5,
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G_FLAT = 0x1E5,
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G = 0x202,
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G_SHARP = 0x220,
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A_FLAT = 0x220,
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A = 0x241,
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A_SHARP = 0x263,
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B_FLAT = 0x263,
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B = 0x287,
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C_FLAT = 0x287,
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B_SHARP = 0x2AE,
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};
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/* Definition of octave information to be ORed onto F-Number */
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enum octaves
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{
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OCTAVE_0 = 0x0000,
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OCTAVE_1 = 0x0400,
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OCTAVE_2 = 0x0800,
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OCTAVE_3 = 0x0C00,
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OCTAVE_4 = 0x1000,
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OCTAVE_5 = 0x1400,
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OCTAVE_6 = 0x1800,
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OCTAVE_7 = 0x1C00
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};
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typedef struct VOICE
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{
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struct VOICE *next;
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struct VOICE *prev;
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unsigned num;
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unsigned key;
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unsigned velocity;
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unsigned channel;
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unsigned pitchleft;
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unsigned pitchright;
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int timbre;
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int port;
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unsigned status;
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} VOICE;
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typedef struct
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{
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VOICE *start;
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VOICE *end;
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} VOICELIST;
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typedef struct
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{
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VOICELIST Voices;
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int Timbre;
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int Pitchbend;
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int KeyOffset;
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unsigned KeyDetune;
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unsigned Volume;
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unsigned EffectiveVolume;
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int Pan;
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int Detune;
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unsigned RPN;
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short PitchBendRange;
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short PitchBendSemiTones;
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short PitchBendHundreds;
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} CHANNEL;
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typedef struct
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{
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unsigned char SAVEK[ 2 ];
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unsigned char Level[ 2 ];
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unsigned char Env1[ 2 ];
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unsigned char Env2[ 2 ];
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unsigned char Wave[ 2 ];
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unsigned char Feedback;
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signed char Transpose;
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signed char Velocity;
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} TIMBRE;
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extern TIMBRE ADLIB_TimbreBank[ 256 ];
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static void AL_ResetVoices( void );
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static void AL_CalcPitchInfo( void );
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static void AL_SetVoiceTimbre( int voice );
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static void AL_SetVoiceVolume( int voice );
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static int AL_AllocVoice( void );
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static int AL_GetVoice( int channel, int key );
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static void AL_SetVoicePitch( int voice );
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static void AL_SetChannelVolume( int channel, int volume );
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static void AL_SetChannelPan( int channel, int pan );
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static void AL_SetChannelDetune( int channel, int detune );
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#endif
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