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78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2001-2003 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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. See the
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* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*
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*/
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#ifndef INCLUDED_MIDISTREAMER
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#define INCLUDED_MIDISTREAMER
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class MidiStreamer;
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#include "mididrv.h"
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struct MidiEvent {
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uint32 delta;
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uint32 event;
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};
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class MidiStreamer {
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public:
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// Called whenever more MIDI commands need to be generated.
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// Return 0 to tell MidiStreamer that end of stream was reached.
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typedef int StreamCallback (void *param, MidiEvent *ev, int num);
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// Special events that can be inserted in a MidiEvent.
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// event = (ME_xxx<<24) | <24-bit data associated with event>
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enum {
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ME_NONE = 0,
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ME_TEMPO = 1
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};
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private:
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MidiDriver *_target;
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StreamCallback *_stream_proc;
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void *_stream_param;
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bool _isOpen;
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bool _paused;
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MidiEvent _events[64];
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int _event_count;
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int _event_index;
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long _driver_tempo;
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long _tempo;
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uint16 _ticks_per_beat;
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long _delay;
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static void timer_thread (void *param);
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void on_timer();
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public:
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MidiStreamer (MidiDriver *target);
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int open();
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void close();
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void send(uint32 b) { if (_isOpen) _target->send (b); }
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uint32 property(int prop, uint32 param);
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void pause(bool p) { _paused = p; }
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void set_stream_callback(void *param, StreamCallback *sc);
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};
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#endif
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