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/* 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_MIDISTREAMER
#define INCLUDED_MIDISTREAMER
class MidiStreamer;
#include "mididrv.h"
struct MidiEvent {
uint32 delta;
uint32 event;
};
class MidiStreamer {
public:
// Called whenever more MIDI commands need to be generated.
// Return 0 to tell MidiStreamer that end of stream was reached.
typedef int StreamCallback (void *param, MidiEvent *ev, int num);
// Special events that can be inserted in a MidiEvent.
// event = (ME_xxx<<24) | <24-bit data associated with event>
enum {
ME_NONE = 0,
ME_TEMPO = 1
};
private:
MidiDriver *_target;
StreamCallback *_stream_proc;
void *_stream_param;
bool _isOpen;
bool _paused;
MidiEvent _events[64];
int _event_count;
int _event_index;
long _driver_tempo;
long _tempo;
uint16 _ticks_per_beat;
long _delay;
static void timer_thread (void *param);
void on_timer();
public:
MidiStreamer (MidiDriver *target);
int open();
void close();
void send(uint32 b) { if (_isOpen) _target->send (b); }
uint32 property(int prop, uint32 param);
void pause(bool p) { _paused = p; }
void set_stream_callback(void *param, StreamCallback *sc);
};
#endif
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