2003-05-18 14:25:33 +00:00
|
|
|
/* ScummVM - Scumm Interpreter
|
|
|
|
* Copyright (C) 2001-2003 The ScummVM project
|
|
|
|
*
|
|
|
|
* 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
|
|
|
|
* along with this program; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*
|
|
|
|
* $Header$
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifndef INCLUDED_MIDIPARSER
|
|
|
|
#define INCLUDED_MIDIPARSER
|
|
|
|
|
|
|
|
class MidiParser;
|
|
|
|
|
|
|
|
#include "common/scummsys.h"
|
|
|
|
|
|
|
|
class MidiDriver;
|
|
|
|
|
2003-05-23 04:19:47 +00:00
|
|
|
|
|
|
|
|
|
|
|
//////////////////////////////////////////////////
|
|
|
|
//
|
|
|
|
// Support entities
|
|
|
|
//
|
|
|
|
//////////////////////////////////////////////////
|
|
|
|
|
|
|
|
struct Tracker {
|
|
|
|
byte * _play_pos;
|
|
|
|
uint32 _play_time;
|
|
|
|
uint32 _play_tick;
|
|
|
|
uint32 _last_event_time;
|
|
|
|
uint32 _last_event_tick;
|
|
|
|
byte _running_status;
|
|
|
|
|
|
|
|
Tracker() { clear(); }
|
|
|
|
|
|
|
|
Tracker (const Tracker ©) :
|
|
|
|
_play_pos (copy._play_pos),
|
|
|
|
_play_time (copy._play_time),
|
|
|
|
_play_tick (copy._play_tick),
|
|
|
|
_last_event_time (copy._last_event_time),
|
|
|
|
_last_event_tick (copy._last_event_tick),
|
|
|
|
_running_status (copy._running_status)
|
|
|
|
{ }
|
|
|
|
|
|
|
|
void clear() {
|
|
|
|
_play_pos = 0;
|
|
|
|
_play_time = 0;
|
|
|
|
_play_tick = 0;
|
|
|
|
_last_event_time = 0;
|
|
|
|
_last_event_tick = 0;
|
|
|
|
_running_status = 0;
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
2003-05-19 18:48:18 +00:00
|
|
|
struct EventInfo {
|
|
|
|
byte * start; // Points to delta
|
|
|
|
uint32 delta;
|
|
|
|
byte event;
|
|
|
|
union {
|
|
|
|
struct {
|
|
|
|
byte param1;
|
|
|
|
byte param2;
|
2003-05-19 19:24:22 +00:00
|
|
|
} basic;
|
2003-05-19 18:48:18 +00:00
|
|
|
struct {
|
|
|
|
byte type; // Used for METAs
|
|
|
|
byte * data; // Used for SysEx and METAs
|
2003-05-19 19:24:22 +00:00
|
|
|
} ext;
|
2003-05-19 18:48:18 +00:00
|
|
|
};
|
2003-05-22 15:34:30 +00:00
|
|
|
uint32 length; // Used for SysEx and METAs, and note lengths
|
2003-05-19 18:48:18 +00:00
|
|
|
|
|
|
|
byte channel() { return event & 0x0F; }
|
|
|
|
byte command() { return event >> 4; }
|
|
|
|
};
|
|
|
|
|
2003-05-22 15:34:30 +00:00
|
|
|
struct NoteTimer {
|
|
|
|
byte channel;
|
|
|
|
byte note;
|
|
|
|
uint32 time_left;
|
|
|
|
NoteTimer() : channel(0), note(0), time_left(0) {}
|
|
|
|
};
|
|
|
|
|
2003-05-23 04:19:47 +00:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//////////////////////////////////////////////////
|
|
|
|
//
|
|
|
|
// MidiParser declaration
|
|
|
|
//
|
|
|
|
//////////////////////////////////////////////////
|
|
|
|
|
2003-05-18 14:25:33 +00:00
|
|
|
class MidiParser {
|
2003-05-22 15:34:30 +00:00
|
|
|
private:
|
|
|
|
uint16 _active_notes[128]; // Each uint16 is a bit mask for channels that have that note on
|
|
|
|
NoteTimer _hanging_notes[32]; // Supports "smart" jump with notes still playing
|
|
|
|
byte _hanging_notes_count;
|
|
|
|
|
2003-05-18 14:25:33 +00:00
|
|
|
protected:
|
|
|
|
MidiDriver *_driver;
|
|
|
|
uint32 _timer_rate;
|
2003-05-19 18:48:18 +00:00
|
|
|
uint32 _ppqn; // Pulses (ticks) Per Quarter Note
|
|
|
|
uint32 _tempo; // Microseconds per quarter note
|
|
|
|
uint32 _psec_per_tick; // Microseconds per tick (_tempo / _ppqn)
|
|
|
|
bool _autoLoop; // For lightweight clients that don't monitor events
|
2003-05-22 15:34:30 +00:00
|
|
|
bool _smartJump; // Support smart expiration of hanging notes when jumping
|
2003-05-19 18:48:18 +00:00
|
|
|
|
2003-05-23 04:19:47 +00:00
|
|
|
byte * _tracks[32];
|
2003-05-19 18:48:18 +00:00
|
|
|
byte _num_tracks;
|
|
|
|
byte _active_track;
|
|
|
|
|
2003-05-23 04:19:47 +00:00
|
|
|
Tracker _position;
|
2003-05-19 18:48:18 +00:00
|
|
|
EventInfo _next_event;
|
2003-05-23 04:19:47 +00:00
|
|
|
bool _abort_parse; // If a jump or some other interruption occurs
|
2003-05-19 18:48:18 +00:00
|
|
|
|
|
|
|
protected:
|
|
|
|
static uint32 readVLQ (byte * &data);
|
2003-05-20 03:27:45 +00:00
|
|
|
virtual void resetTracking();
|
|
|
|
virtual void allNotesOff();
|
2003-05-19 18:48:18 +00:00
|
|
|
virtual void parseNextEvent (EventInfo &info) = 0;
|
|
|
|
|
2003-05-22 15:34:30 +00:00
|
|
|
void activeNote (byte channel, byte note, bool active);
|
|
|
|
void hangingNote (byte channel, byte note, uint32 ticks_left);
|
2003-05-23 04:19:47 +00:00
|
|
|
void hangAllActiveNotes();
|
2003-05-22 15:34:30 +00:00
|
|
|
|
2003-05-19 18:48:18 +00:00
|
|
|
// Multi-byte read helpers
|
|
|
|
uint32 read4high (byte * &data) {
|
|
|
|
uint32 val = 0;
|
|
|
|
int i;
|
|
|
|
for (i = 0; i < 4; ++i) val = (val << 8) | *data++;
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
uint16 read2low (byte * &data) {
|
|
|
|
uint16 val = 0;
|
|
|
|
int i;
|
|
|
|
for (i = 0; i < 2; ++i) val |= (*data++) << (i * 8);
|
|
|
|
return val;
|
|
|
|
}
|
2003-05-18 14:25:33 +00:00
|
|
|
|
2003-05-19 05:00:13 +00:00
|
|
|
public:
|
|
|
|
enum {
|
2003-05-19 18:48:18 +00:00
|
|
|
mpMalformedPitchBends = 1,
|
2003-05-22 15:34:30 +00:00
|
|
|
mpAutoLoop = 2,
|
|
|
|
mpSmartJump = 3
|
2003-05-19 05:00:13 +00:00
|
|
|
};
|
|
|
|
|
2003-05-18 14:25:33 +00:00
|
|
|
public:
|
2003-05-19 18:48:18 +00:00
|
|
|
MidiParser();
|
2003-05-23 15:04:41 +00:00
|
|
|
virtual ~MidiParser() { allNotesOff(); }
|
2003-05-19 00:12:16 +00:00
|
|
|
|
2003-05-18 23:55:53 +00:00
|
|
|
virtual bool loadMusic (byte *data, uint32 size) = 0;
|
2003-05-18 14:25:33 +00:00
|
|
|
virtual void unloadMusic() = 0;
|
2003-05-19 18:48:18 +00:00
|
|
|
virtual void property (int prop, int value);
|
2003-05-18 14:25:33 +00:00
|
|
|
|
|
|
|
void setMidiDriver (MidiDriver *driver) { _driver = driver; }
|
2003-05-23 04:19:47 +00:00
|
|
|
void setTimerRate (uint32 rate) { _timer_rate = rate; }
|
|
|
|
void setTempo (uint32 tempo);
|
2003-05-19 18:48:18 +00:00
|
|
|
void onTimer();
|
2003-05-18 14:25:33 +00:00
|
|
|
|
2003-05-21 06:14:14 +00:00
|
|
|
bool setTrack (int track);
|
2003-05-23 04:19:47 +00:00
|
|
|
bool jumpToTick (uint32 tick, bool fireEvents = false);
|
|
|
|
uint32 getTick() { return _position._play_tick; }
|
2003-05-18 14:25:33 +00:00
|
|
|
|
2003-05-18 23:55:53 +00:00
|
|
|
static MidiParser *createParser_SMF();
|
2003-05-18 14:25:33 +00:00
|
|
|
static MidiParser *createParser_XMIDI();
|
2003-05-19 05:00:13 +00:00
|
|
|
static void timerCallback (void *data) { ((MidiParser *) data)->onTimer(); }
|
2003-05-18 14:25:33 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
#endif
|