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