mirror of
https://github.com/libretro/scummvm.git
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143 lines
4.0 KiB
C++
143 lines
4.0 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2001 Ludvig Strigeus
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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_MIDIDRV_H
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#define SOUND_MIDIDRV_H
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#include "scummsys.h"
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class MidiChannel;
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// Abstract MIDI Driver Class
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class MidiDriver {
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public:
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// Error codes returned by open.
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// Can be converted to a string with getErrorName()
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enum {
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MERR_CANNOT_CONNECT = 1,
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// MERR_STREAMING_NOT_AVAILABLE = 2,
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MERR_DEVICE_NOT_AVAILABLE = 3,
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MERR_ALREADY_OPEN = 4
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};
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enum {
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PROP_TIMEDIV = 1,
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PROP_SMALLHEADER = 2
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};
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// Open the midi driver.
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// Returns 0 if successful, otherwise an error code.
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virtual int open() = 0;
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// Close the midi driver
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virtual void close() = 0;
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// Output a packed midi command to the midi stream
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virtual void send(uint32 b) = 0;
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// Get or set a property
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virtual uint32 property(int prop, uint32 param) { return 0; }
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// Retrieve a string representation of an error code
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static const char *getErrorName(int error_code);
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// HIGH-LEVEL SEMANTIC METHODS
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virtual void setPitchBendRange (byte channel, uint range)
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{
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send(( 0 << 16) | (101 << 8) | (0xB0 | channel));
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send(( 0 << 16) | (100 << 8) | (0xB0 | channel));
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send((range << 16) | ( 6 << 8) | (0xB0 | channel));
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send(( 0 << 16) | ( 38 << 8) | (0xB0 | channel));
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}
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virtual void sysEx (byte *msg, uint16 length) { }
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virtual void sysEx_customInstrument (byte channel, uint32 type, byte *instr) { }
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// Timing functions - MidiDriver now operates timers
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virtual void setTimerCallback (void *timer_param, void (*timer_proc) (void *)) = 0;
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virtual uint32 getBaseTempo (void) = 0;
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// Channel allocation functions
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virtual MidiChannel *allocateChannel() = 0;
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virtual MidiChannel *getPercussionChannel() = 0;
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};
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class MidiChannel {
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public:
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virtual MidiDriver *device() = 0;
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virtual byte getNumber() = 0;
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virtual void release() = 0;
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// Regular messages
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virtual void noteOff (byte note) = 0;
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virtual void noteOn (byte note, byte velocity) = 0;
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virtual void programChange (byte program) = 0;
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virtual void pitchBend (int16 bend) = 0; // -0x2000 to +0x1FFF
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// Control Change messages
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virtual void controlChange (byte control, byte value) = 0;
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virtual void modulationWheel (byte value) = 0;
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virtual void volume (byte value) = 0;
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virtual void panPosition (byte value) = 0;
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virtual void pitchBendFactor (byte value) = 0;
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virtual void detune (byte value) = 0;
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virtual void priority (byte value) = 0;
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virtual void sustain (bool value) = 0;
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virtual void effectLevel (byte value) = 0;
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virtual void chorusLevel (byte value) = 0;
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virtual void allNotesOff() = 0;
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// SysEx messages
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virtual void sysEx_customInstrument (uint32 type, byte *instr) = 0;
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};
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// MIDI Driver Types
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enum {
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MD_AUTO = 0,
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MD_NULL = 1,
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MD_WINDOWS = 2,
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MD_TIMIDITY = 3,
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MD_SEQ = 4,
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MD_QTMUSIC = 5,
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MD_ETUDE = 6,
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MD_COREAUDIO = 7,
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MD_MIDIEMU = 8,
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MD_ALSA = 9,
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MD_ADLIB = 10,
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MD_YPA1 = 100 // palmos
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};
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// Factory functions, for faster compile
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extern MidiDriver *MidiDriver_NULL_create();
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extern MidiDriver *MidiDriver_ADLIB_create();
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extern MidiDriver *MidiDriver_WIN_create();
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extern MidiDriver *MidiDriver_SEQ_create();
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extern MidiDriver *MidiDriver_QT_create();
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extern MidiDriver *MidiDriver_CORE_create();
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extern MidiDriver *MidiDriver_ETUDE_create();
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extern MidiDriver *MidiDriver_ALSA_create();
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extern MidiDriver *MidiDriver_YamahaPa1_create();
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#endif
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