79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
/* This file is part of Om. Copyright (C) 2006 Dave Robillard.
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*
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* Om is free software; you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* Om is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef MIDIDRIVER_H
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#define MIDIDRIVER_H
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#include "Driver.h"
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#include <iostream>
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using std::cout; using std::endl;
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namespace Om {
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class MidiMessage;
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/** Midi driver abstract base class.
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*
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* \ingroup engine
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*/
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class MidiDriver : public Driver<MidiMessage>
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{
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public:
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/** Prepare events (however neccessary) for the specified block (realtime safe) */
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virtual void prepare_block(const samplecount block_start, const samplecount block_end) = 0;
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};
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/** Dummy MIDIDriver.
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*
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* Not abstract, all functions are dummies. One of these will be allocated and
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* "used" if no working MIDI driver is loaded. (Doing it this way as opposed to
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* just making MidiDriver have dummy functions makes sure any existing MidiDriver
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* derived class actually implements the required functions).
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*
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* \ingroup engine
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*/
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class DummyMidiDriver : public MidiDriver
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{
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public:
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DummyMidiDriver() {
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cout << "[DummyMidiDriver] Started Dummy MIDI driver." << endl;
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}
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~DummyMidiDriver() {}
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void activate() {}
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void deactivate() {}
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bool is_activated() const { return false; }
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bool is_enabled() const { return false; }
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void enable() {}
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void disable() {}
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DriverPort* create_port(PortBase<MidiMessage>* patch_port) { return NULL; }
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void prepare_block(const samplecount block_start, const samplecount block_end) {}
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};
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} // namespace Om
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#endif // MIDIDRIVER_H
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