ref: 09a21797abe4a341f26b9d9db21b736fcf8965fc
dir: /Game/src/midi/xmidi.h/
/*
Copyright (C) 2000 Ryan Nunn
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
aint32_t with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// Tab Size = 4
#ifndef __XMIDI_h_
#define __XMIDI_h_
#include <string>
//#include "common_types.h"
#include "databuf.h"
// Conversion types for Midi files
#define XMIDI_CONVERT_NOCONVERSION 0
#define XMIDI_CONVERT_MT32_TO_GM 1
#define XMIDI_CONVERT_MT32_TO_GS 2
#define XMIDI_CONVERT_MT32_TO_GS127 3
#define XMIDI_CONVERT_OGG 4
#define XMIDI_CONVERT_GS127_TO_GS 5
#define XMIDI_CONVERT_EMIDI_GM 6 // For Duke3D! Selects General Midi tracks
// Midi Status Bytes
#define MIDI_STATUS_NOTE_OFF 0x8
#define MIDI_STATUS_NOTE_ON 0x9
#define MIDI_STATUS_AFTERTOUCH 0xA
#define MIDI_STATUS_CONTROLLER 0xB
#define MIDI_STATUS_PROG_CHANGE 0xC
#define MIDI_STATUS_PRESSURE 0xD
#define MIDI_STATUS_PITCH_WHEEL 0xE
#define MIDI_STATUS_SYSEX 0xF
// XMIDI Controllers
#define XMIDI_CONTROLLER_CHAN_LOCK 0x6e // Channel Lock
#define XMIDI_CONTROLLER_CHAN_LOCK_PROT 0x6f // Channel Lock Protect
#define XMIDI_CONTROLLER_VOICE_PROT 0x70 // Voice Protect
#define XMIDI_CONTROLLER_TIMBRE_PROT 0x71 // Timbre Protect
#define XMIDI_CONTROLLER_BANK_CHANGE 0x72 // Bank Change
#define XMIDI_CONTROLLER_IND_CTRL_PREFIX 0x73 // Indirect Controller Prefix
#define XMIDI_CONTROLLER_FOR_LOOP 0x74 // For Loop
#define XMIDI_CONTROLLER_NEXT_BREAK 0x75 // Next/Break
#define XMIDI_CONTROLLER_CLEAR_BB_COUNT 0x76 // Clear Beat/Bar Count
#define XMIDI_CONTROLLER_CALLBACK_TRIG 0x77 // Callback Trigger
#define XMIDI_CONTROLLER_SEQ_BRANCH_INDEX 0x78 // Sequence Branch Index
#define EMIDI_CONTROLLER_TRACK_DESIGNATION 110 // Track Designation
#define EMIDI_CONTROLLER_TRACK_EXCLUSION 111 // Track Exclusion
#define EMIDI_CONTROLLER_PROGRAM_CHANGE 112 // Program Change
#define EMIDI_CONTROLLER_VOLUME 113 // Volume
#define EMIDI_CONTROLLER_LOOP_BEGIN XMIDI_CONTROLLER_FOR_LOOP
#define EMIDI_CONTROLLER_LOOP_END XMIDI_CONTROLLER_NEXT_BREAK
// Maximum number of for loops we'll allow (used by win_midiout)
#define XMIDI_MAX_FOR_LOOP_COUNT 128
template <class T> class GammaTable;
struct midi_event
{
int time;
uint8_t status;
uint8_t data[2];
uint32_t len; // Length of SysEx Data
uint8_t *buffer; // SysEx Data
int duration; // Duration of note (120 Hz)
midi_event *next_note; // The next note on the stack
uint32_t note_time; // Time note stops playing (6000th of second)
midi_event *next;
};
class NoteStack {
midi_event *notes; // Top of the stack
int polyphony;
int max_polyphony;
public:
NoteStack() : notes(0), polyphony(0), max_polyphony(0) { }
// Just clear it. Don't care about what's actually in it
void clear() {
notes=0;
polyphony=0;
max_polyphony=0;
}
// Pops the top of the stack if its off_time is <= time (6000th of second)
inline midi_event *PopTime(uint32_t time) {
if (notes && notes->note_time <= time) {
midi_event *note = notes;
notes = note->next_note;
note->next_note = 0;
polyphony--;
return note;
}
return 0;
}
// Pops the top of the stack
inline midi_event *Pop() {
if (notes) {
midi_event *note = notes;
notes = note->next_note;
note->next_note = 0;
polyphony--;
return note;
}
return 0;
}
// Pops the top of the stack
inline midi_event *Remove(midi_event *event) {
midi_event *prev = 0;
midi_event *note = notes;
while (note) {
if (note == event) {
if (prev) prev->next_note = note->next_note;
else notes = note->next_note;
note->next_note = 0;
polyphony--;
return note;
}
prev = note;
note = note->next_note;
}
return 0;
}
// Finds the note that has same pitch and channel, and pops it
inline midi_event *FindAndPop(midi_event *event) {
midi_event *prev = 0;
midi_event *note = notes;
while (note) {
if ((note->status & 0xF) == (event->status & 0xF) && note->data[0] == event->data[0]) {
if (prev) prev->next_note = note->next_note;
else notes = note->next_note;
note->next_note = 0;
polyphony--;
return note;
}
prev = note;
note = note->next_note;
}
return 0;
}
// Pushes a note onto the top of the stack
inline void Push(midi_event *event) {
event->next_note = notes;
notes = event;
polyphony++;
if (max_polyphony < polyphony) max_polyphony = polyphony;
}
inline void Push(midi_event *event, uint32_t time) {
event->note_time = time;
event->next_note = 0;
polyphony++;
if (max_polyphony < polyphony) max_polyphony = polyphony;
if (!notes || time <= notes->note_time) {
event->next_note = notes;
notes = event;
}
else {
midi_event *prev = notes;
while (prev) {
midi_event *note = prev->next_note;
if (!note || time <= note->note_time) {
event->next_note = note;
prev->next_note = event;
return;
}
prev = note;
}
}
}
inline int GetPolyphony() {
return polyphony;
}
inline int GetMaxPolyphony() {
return max_polyphony;
}
};
class XMIDIEventList
{
int counter;
// Helper funcs for Write
int PutVLQ(DataSource *dest, uint32_t value);
uint32_t ConvertListToMTrk (DataSource *dest);
static void DeleteEventList (midi_event *list);
public:
midi_event *events;
// Write this list to a file/buffer
int Write (const uint8_t *filename);
int Write (DataSource *dest);
// Increments the counter
void IncerementCounter () { counter++; }
// Decrement the counter and delete the event list, if possible
void DecerementCounter ();
};
class XMIDI
{
protected:
uint16_t num_tracks;
private:
XMIDIEventList **events;
midi_event *list;
midi_event *current;
midi_event *notes_on;
const static uint8_t mt32asgm[128];
const static uint8_t mt32asgs[256];
bool bank127[16];
int convert_type;
bool is_emidi;
bool use_emidi_112;
bool use_emidi_113;
bool do_reverb;
bool do_chorus;
int chorus_value;
int reverb_value;
public:
XMIDI(DataSource *source, int pconvert);
~XMIDI();
int number_of_tracks() { return num_tracks; }
// External Event list functions
XMIDIEventList *GetEventList (uint32_t track);
// Not yet implimented
// int apply_patch (int track, DataSource *source);
private:
XMIDI(); // No default constructor
struct first_state { // Status, Data[0]
midi_event *patch[16]; // 0xC
midi_event *bank[16]; // 0xB, 0
midi_event *pan[16]; // 0xB, 7
midi_event *vol[16]; // 0xB, 10
};
// List manipulation
void CreateNewEvent (int time);
// Variable length quantity
int GetVLQ (DataSource *source, uint32_t &quant);
int GetVLQ2 (DataSource *source, uint32_t &quant);
void AdjustTimings(uint32_t ppqn); // This is used by Midi's ONLY!
void ApplyFirstState(first_state &fs, int chan_mask);
int ConvertNote (const int time, const uint8_t status, DataSource *source, const int size);
int ConvertEvent (const int time, uint8_t status, DataSource *source, const int size, first_state& fs);
int ConvertSystemMessage (const int time, const uint8_t status, DataSource *source);
int ConvertFiletoList (DataSource *source, const bool is_xmi, first_state& fs);
int ExtractTracksFromXmi (DataSource *source);
int ExtractTracksFromMid (DataSource *source, const uint32_t ppqn, const int num_tracks, const bool type1);
int ExtractTracks (DataSource *source);
};
#endif