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/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001/2002 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"

class MidiStreamer : public MidiDriver {
public:
	/* called whenever the midi driver is in streaming mode,
	 * and more midi commands need to be generated
	 * return 0 to tell the mididriver that the end of stream was reached
	 */
	typedef int StreamCallback (void *param, MidiEvent * ev, int num);

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 setPitchBendRange (byte channel, uint range) { _target->setPitchBendRange (channel, range); }

	void pause(bool p) { _paused = p; }
	void set_stream_callback(void *param, StreamCallback *sc);

	void setTimerCallback (void *timer_param, void (*timer_proc) (void *)) { }
	uint32 getBaseTempo (void) { return _target->getBaseTempo(); }

	MidiChannel *allocateChannel() { return NULL; }
	MidiChannel *getPercussionChannel() { return NULL; }
};

#endif