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154e872d5a
This circumvents problems doing generic send() calls to MidiDrivers that support more than 16 MIDI channels (i.e. Adlib). Because of the way it interacts with MidiDriver, Simon could have run into a problem if it tried to allocate more than 15 Adlib music channels (though this would only happen in very, VERY rare circumstances). Also fixed a problem with the channel numbering scheme used by MidiDriver_Adlib, in particular the percussion channel number. svn-id: r9604
104 lines
2.9 KiB
C++
104 lines
2.9 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 SOUND_MPU401_H
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#define SOUND_MPU401_H
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#include "common/system.h"
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#include "mididrv.h"
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////////////////////////////////////////
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//
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// Common MPU401 implementation methods
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//
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////////////////////////////////////////
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class MidiDriver_MPU401;
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class MidiChannel_MPU401 : public MidiChannel {
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friend class MidiDriver_MPU401;
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private:
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MidiDriver_MPU401 *_owner;
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bool _allocated;
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byte _channel;
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void init (MidiDriver_MPU401 *owner, byte channel);
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void allocate() { _allocated = true; }
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public:
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MidiDriver *device();
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byte getNumber() { return _channel; }
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void release() { _allocated = false; }
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void send (uint32 b);
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// Regular messages
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void noteOff (byte note);
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void noteOn (byte note, byte velocity);
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void programChange (byte program);
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void pitchBend (int16 bend);
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// Control Change messages
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void controlChange (byte control, byte value);
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void modulationWheel (byte value) { controlChange (1, value); }
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void volume (byte value) { controlChange (7, value); }
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void panPosition (byte value) { controlChange (10, value); }
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void pitchBendFactor (byte value);
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void detune (byte value) { controlChange (17, value); }
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void priority (byte value) { controlChange (18, value); }
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void sustain (bool value) { controlChange (64, value ? 1 : 0); }
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void effectLevel (byte value) { controlChange (91, value); }
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void chorusLevel (byte value) { controlChange (93, value); }
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void allNotesOff() { controlChange (123, 0); }
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// SysEx messages
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void sysEx_customInstrument (uint32 type, byte *instr);
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};
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class MidiDriver_MPU401 : public MidiDriver {
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private:
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typedef void (*TimerCallback) (void*);
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MidiChannel_MPU401 _midi_channels [16];
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volatile bool _started_thread;
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OSystem::MutexRef _mutex; // Concurrent shutdown barrier
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volatile TimerCallback _timer_proc;
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void *_timer_param;
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static int midi_driver_thread (void *param);
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public:
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MidiDriver_MPU401();
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virtual void close();
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void setTimerCallback(void *timer_param, TimerCallback timer_proc);
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uint32 getBaseTempo(void) { return 10000; }
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MidiChannel *allocateChannel();
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MidiChannel *getPercussionChannel() { return &_midi_channels [9]; }
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};
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#endif
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