native_midi_common.h
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native_midi: Hardware Midi support for the SDL_mixer library
Copyright (C) 2000,2001 Florian 'Proff' Schulze <florian.proff.schulze@gmx.net>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
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*/
#ifndef _NATIVE_MIDI_COMMON_H_
#define _NATIVE_MIDI_COMMON_H_
#include "SDL.h"
/* Midi Status Bytes */
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#define MIDI_STATUS_NOTE_OFF 0x8
#define MIDI_STATUS_NOTE_ON 0x9
#define MIDI_STATUS_AFTERTOUCH 0xA
#define MIDI_STATUS_CONTROLLER 0xB
#define MIDI_STATUS_PROG_CHANGE 0xC
#define MIDI_STATUS_PRESSURE 0xD
#define MIDI_STATUS_PITCH_WHEEL 0xE
#define MIDI_STATUS_SYSEX 0xF
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/* We store the midi events in a linked list; this way it is
easy to shuffle the tracks together later on; and we are
flexible in the size of each elemnt.
*/
typedef struct MIDIEvent
{
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Uint32 time; /* Time at which this midi events occurs */
Uint8 status; /* Status byte */
Uint8 data[2]; /* 1 or 2 bytes additional data for most events */
Uint32 extraLen; /* For some SysEx events, we need additional storage */
Uint8 *extraData;
struct MIDIEvent *next;
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} MIDIEvent;
/* Load a midifile to memory, converting it to a list of MIDIEvents.
This function returns a linked lists of MIDIEvents, 0 if an error occured.
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MIDIEvent *CreateMIDIEventList(SDL_RWops *rw, Uint16 *division);
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/* Release a MIDIEvent list after usage. */
void FreeMIDIEventList(MIDIEvent *head);
#endif /* _NATIVE_MIDI_COMMON_H_ */