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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $Header$
*
*/
#ifndef SOUND_MIDIDRV_H
#define SOUND_MIDIDRV_H
#include "common/scummsys.h"
#include "common/timer.h"
class MidiChannel;
namespace Audio {
class Mixer;
}
namespace Common { class String; }
/**
* Music Driver Types, used to uniquely identify each music driver.
*
* The pseudo drivers are listed first, then all native drivers,
* then all other MIDI drivers, and finally the non-MIDI drivers.
*
* @todo Rename MidiDriverType to MusicDriverType
*/
enum MidiDriverType {
// Pseudo drivers
MD_AUTO,
MD_NULL,
// Windows
MD_WINDOWS,
// Linux
MD_ALSA,
MD_SEQ,
// Mac OS X
MD_QTMUSIC,
MD_COREAUDIO,
MD_COREMIDI,
// PalmOS
MD_YPA1,
MD_ZODIAC,
// MorphOS
MD_ETUDE,
// MIDI softsynths
MD_FLUIDSYNTH,
MD_MT32,
// "Fake" MIDI devices
MD_ADLIB,
MD_PCSPK,
MD_PCJR,
MD_TOWNS
};
/**
* A set of flags to be passed to detectMusicDriver() which can be used to
* specify what kind of music driver is preferred / accepted.
*
* The flags (except for MDT_PREFER_NATIVE) indicate whether a given driver
* type is acceptable. E.g. the TOWNS music driver could be returned by
* detectMusicDriver if and only if MDT_TOWNS is specified.
*
* @todo Rename MidiDriverFlags to MusicDriverFlags
*/
enum MidiDriverFlags {
MDT_NONE = 0,
MDT_PCSPK = 1 << 0, // PC Speaker: Maps to MD_PCSPK and MD_PCJR
MDT_ADLIB = 1 << 1, // Adlib: Maps to MD_ADLIB
MDT_TOWNS = 1 << 2, // FM-TOWNS: Maps to MD_TOWNS
MDT_MIDI = 1 << 3, // Real MIDI
MDT_PREFER_MIDI = 1 << 4, // Real MIDI output is preferred
MDT_NATIVE = MDT_MIDI, // Alias for MDT_MIDI
MDT_PREFER_NATIVE = MDT_PREFER_MIDI // Alias for MDT_PREFER_MIDI
};
/**
* Abstract description of a MIDI driver. Used by the config file and command
* line parsing code, and also to be able to give the user a list of available
* drivers.
*
* @todo Rename MidiDriverType to MusicDriverType
*/
struct MidiDriverDescription {
const char *name;
const char *description;
MidiDriverType id; // A unique ID for each driver
int flags; // Capabilities of this driver
};
/**
* Abstract MIDI Driver Class
*
* @todo Rename MidiDriver to MusicDriver
*/
class MidiDriver {
public:
/** Convert a string containing a music driver name into MIDI Driver type. */
static int parseMusicDriver(const Common::String &str);
/**
* Get a list of all available MidiDriver types.
* @return list of all available midi drivers, terminated by a zero entry
*/
static const MidiDriverDescription *getAvailableMidiDrivers();
static MidiDriver *createMidi(int midiDriver);
static int detectMusicDriver(int midiFlags);
public:
virtual ~MidiDriver() { }
static const byte _mt32ToGm[128];
static const byte _gmToMt32[128];
/**
* Error codes returned by open.
* Can be converted to a string with getErrorName().
*/
enum {
MERR_CANNOT_CONNECT = 1,
// MERR_STREAMING_NOT_AVAILABLE = 2,
MERR_DEVICE_NOT_AVAILABLE = 3,
MERR_ALREADY_OPEN = 4
};
enum {
// PROP_TIMEDIV = 1,
PROP_OLD_ADLIB = 2,
PROP_CHANNEL_MASK = 3
};
/**
* Open the midi driver.
* @return 0 if successful, otherwise an error code.
*/
virtual int open() = 0;
/** Close the midi driver. */
virtual void close() = 0;
/** Output a packed midi command to the midi stream. */
virtual void send(uint32 b) = 0;
/** Get or set a property. */
virtual uint32 property(int prop, uint32 param) { return 0; }
/** Retrieve a string representation of an error code. */
static const char *getErrorName(int error_code);
// HIGH-LEVEL SEMANTIC METHODS
virtual void setPitchBendRange(byte channel, uint range)
{
send(( 0 << 16) | (101 << 8) | (0xB0 | channel));
send(( 0 << 16) | (100 << 8) | (0xB0 | channel));
send((range << 16) | ( 6 << 8) | (0xB0 | channel));
send(( 0 << 16) | ( 38 << 8) | (0xB0 | channel));
send(( 127 << 16) | (101 << 8) | (0xB0 | channel));
send(( 127 << 16) | (100 << 8) | (0xB0 | channel));
}
virtual void sysEx(byte *msg, uint16 length) { }
virtual void sysEx_customInstrument(byte channel, uint32 type, byte *instr) { }
virtual void metaEvent(byte type, byte*data, uint16 length) { }
// Timing functions - MidiDriver now operates timers
virtual void setTimerCallback(void *timer_param, Common::Timer::TimerProc timer_proc) = 0;
/** The time in microseconds between invocations of the timer callback. */
virtual uint32 getBaseTempo(void) = 0;
// Channel allocation functions
virtual MidiChannel *allocateChannel() = 0;
virtual MidiChannel *getPercussionChannel() = 0;
};
class MidiChannel {
public:
virtual ~MidiChannel() {}
virtual MidiDriver *device() = 0;
virtual byte getNumber() = 0;
virtual void release() = 0;
virtual void send(uint32 b) = 0; // 4-bit channel portion is ignored
// Regular messages
virtual void noteOff(byte note) = 0;
virtual void noteOn(byte note, byte velocity) = 0;
virtual void programChange(byte program) = 0;
virtual void pitchBend(int16 bend) = 0; // -0x2000 to +0x1FFF
// Control Change messages
virtual void controlChange(byte control, byte value) = 0;
virtual void modulationWheel(byte value) { controlChange (1, value); }
virtual void volume(byte value) { controlChange (7, value); }
virtual void panPosition(byte value) { controlChange (10, value); }
virtual void pitchBendFactor(byte value) = 0;
virtual void detune(byte value) { controlChange (17, value); }
virtual void priority(byte value) { }
virtual void sustain(bool value) { controlChange (64, value ? 1 : 0); }
virtual void effectLevel(byte value) { controlChange (91, value); }
virtual void chorusLevel(byte value) { controlChange (93, value); }
virtual void allNotesOff() { controlChange (123, 0); }
// SysEx messages
virtual void sysEx_customInstrument(uint32 type, byte *instr) = 0;
};
// Factory functions, for faster compile
extern MidiDriver *MidiDriver_NULL_create();
extern MidiDriver *MidiDriver_ADLIB_create(Audio::Mixer *mixer);
extern MidiDriver *MidiDriver_WIN_create();
extern MidiDriver *MidiDriver_SEQ_create();
extern MidiDriver *MidiDriver_QT_create();
extern MidiDriver *MidiDriver_CORE_create();
extern MidiDriver *MidiDriver_CoreMIDI_create();
extern MidiDriver *MidiDriver_ETUDE_create();
extern MidiDriver *MidiDriver_ALSA_create();
extern MidiDriver *MidiDriver_YM2612_create(Audio::Mixer *mixer);
#ifdef USE_FLUIDSYNTH
extern MidiDriver *MidiDriver_FluidSynth_create(Audio::Mixer *mixer);
#endif
#ifdef USE_MT32EMU
extern MidiDriver *MidiDriver_MT32_create(Audio::Mixer *mixer);
#endif
extern MidiDriver *MidiDriver_YamahaPa1_create();
extern MidiDriver *MidiDriver_Zodiac_create();
#endif
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