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145 lines
4.6 KiB
C
145 lines
4.6 KiB
C
//-------------------------------------------------------------------------
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/*
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Copyright (C) 2016 EDuke32 developers and contributors
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This file is part of EDuke32.
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EDuke32 is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License version 2
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as published by the Free Software Foundation.
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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//-------------------------------------------------------------------------
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#ifndef ___MIDI_H
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#define ___MIDI_H
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#include "compat.h"
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#define RELATIVE_BEAT(measure, beat, tick) ((tick) + ((beat) << 9) + ((measure) << 16))
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//Bobby Prince thinks this may be 100
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//#define GENMIDI_DefaultVolume 100
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#define GENMIDI_DefaultVolume 90
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#define MAX_FORMAT 1
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#define NUM_MIDI_CHANNELS 16
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#define TIME_PRECISION 16
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#define MIDI_HEADER_SIGNATURE 0x6468544d // "MThd"
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#define MIDI_TRACK_SIGNATURE 0x6b72544d // "MTrk"
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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_RHYTHM_CHANNEL 9
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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_MSB 0
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#define MIDI_PITCHBEND_LSB 0
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#define MIDI_RUNNING_STATUS 0x80
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#define MIDI_NOTE_OFF 0x8
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#define MIDI_NOTE_ON 0x9
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#define MIDI_POLY_AFTER_TCH 0xA
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#define MIDI_CONTROL_CHANGE 0xB
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#define MIDI_PROGRAM_CHANGE 0xC
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#define MIDI_AFTER_TOUCH 0xD
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#define MIDI_PITCH_BEND 0xE
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#define MIDI_SPECIAL 0xF
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#define MIDI_SYSEX 0xF0
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#define MIDI_SYSEX_CONTINUE 0xF7
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#define MIDI_META_EVENT 0xFF
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#define MIDI_END_OF_TRACK 0x2F
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#define MIDI_TEMPO_CHANGE 0x51
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#define MIDI_TIME_SIGNATURE 0x58
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#define MIDI_RESET_ALL_CONTROLLERS 0x79
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#define MIDI_ALL_NOTES_OFF 0x7b
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#define MIDI_MONO_MODE_ON 0x7E
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#define MIDI_SYSTEM_RESET 0xFF
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#define GET_NEXT_EVENT(track, data) \
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(data) = *(track)->pos; \
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(track)->pos += 1
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#define GET_MIDI_CHANNEL(event) ((event)&0xf)
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#define GET_MIDI_COMMAND(event) ((event) >> 4)
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#define EMIDI_INFINITE -1
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#define EMIDI_END_LOOP_VALUE 127
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#define EMIDI_ALL_CARDS 127
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#define EMIDI_INCLUDE_TRACK 110
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#define EMIDI_EXCLUDE_TRACK 111
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#define EMIDI_PROGRAM_CHANGE 112
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#define EMIDI_VOLUME_CHANGE 113
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#define EMIDI_CONTEXT_START 114
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#define EMIDI_CONTEXT_END 115
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#define EMIDI_LOOP_START 116
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#define EMIDI_LOOP_END 117
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#define EMIDI_SONG_LOOP_START 118
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#define EMIDI_SONG_LOOP_END 119
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#define EMIDI_GeneralMIDI 0
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#define EMIDI_AffectsCurrentCard(c, type) (((c) == EMIDI_ALL_CARDS) || ((c) == (type)))
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#define EMIDI_NUM_CONTEXTS 7
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typedef struct
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{
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char *pos;
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char *loopstart;
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int16_t loopcount;
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int16_t RunningStatus;
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unsigned time;
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int32_t FPSecondsPerTick;
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int16_t tick;
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int16_t beat;
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int16_t measure;
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int16_t BeatsPerMeasure;
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int16_t TicksPerBeat;
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int16_t TimeBase;
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int32_t delay;
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int16_t active;
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} songcontext;
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typedef struct
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{
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char *start;
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char *pos;
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int32_t delay;
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int16_t active;
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int16_t RunningStatus;
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int16_t currentcontext;
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songcontext context[EMIDI_NUM_CONTEXTS];
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char EMIDI_IncludeTrack;
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char EMIDI_ProgramChange;
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char EMIDI_VolumeChange;
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} track;
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static int32_t _MIDI_ReadNumber( void *from, size_t size );
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static int32_t _MIDI_ReadDelta( track *ptr );
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static void _MIDI_ResetTracks( void );
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static void _MIDI_AdvanceTick( void );
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static void _MIDI_MetaEvent( track *Track );
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static void _MIDI_SysEx( track *Track );
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static int32_t _MIDI_InterpretControllerInfo(track *Track, int32_t TimeSet, int32_t channel, int32_t c1, int32_t c2);
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static int32_t _MIDI_SendControlChange( int32_t channel, int32_t c1, int32_t c2 );
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static void _MIDI_SetChannelVolume( int32_t channel, int32_t volume );
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static void _MIDI_SendChannelVolumes( void );
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static void _MIDI_InitEMIDI( void );
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#endif
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