native_midi/native_midi_common.h
author Ozkan Sezer <sezeroz@gmail.com>
Sun, 07 Oct 2018 03:07:33 +0300
branchSDL-1.2
changeset 885 dd251a0ec666
parent 518 8bc9b5fd2aae
child 617 87116a42526e
permissions -rw-r--r--
backport fix for bug #2795. (from 2.0 branch commit b28b41b93ba7).
     1 /*
     2   native_midi:  Hardware Midi support for the SDL_mixer library
     3   Copyright (C) 2000,2001  Florian 'Proff' Schulze <florian.proff.schulze@gmx.net>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 
    22 #ifndef _NATIVE_MIDI_COMMON_H_
    23 #define _NATIVE_MIDI_COMMON_H_
    24 
    25 #include "SDL.h"
    26 
    27 /* Midi Status Bytes */
    28 #define MIDI_STATUS_NOTE_OFF	0x8
    29 #define MIDI_STATUS_NOTE_ON	0x9
    30 #define MIDI_STATUS_AFTERTOUCH	0xA
    31 #define MIDI_STATUS_CONTROLLER	0xB
    32 #define MIDI_STATUS_PROG_CHANGE	0xC
    33 #define MIDI_STATUS_PRESSURE	0xD
    34 #define MIDI_STATUS_PITCH_WHEEL	0xE
    35 #define MIDI_STATUS_SYSEX	0xF
    36 
    37 /* We store the midi events in a linked list; this way it is
    38    easy to shuffle the tracks together later on; and we are
    39    flexible in the size of each elemnt.
    40  */
    41 typedef struct MIDIEvent
    42 {
    43 	Uint32	time;		/* Time at which this midi events occurs */
    44 	Uint8	status;		/* Status byte */
    45 	Uint8	data[2];	/* 1 or 2 bytes additional data for most events */
    46 
    47 	Uint32	extraLen;	/* For some SysEx events, we need additional storage */
    48 	Uint8	*extraData;
    49 	
    50 	struct MIDIEvent *next;
    51 } MIDIEvent;
    52 
    53 
    54 /* Load a midifile to memory, converting it to a list of MIDIEvents.
    55    This function returns a linked lists of MIDIEvents, 0 if an error occured.
    56  */ 
    57 MIDIEvent *CreateMIDIEventList(SDL_RWops *rw, Uint16 *division);
    58 
    59 /* Release a MIDIEvent list after usage. */
    60 void FreeMIDIEventList(MIDIEvent *head);
    61 
    62 
    63 #endif /* _NATIVE_MIDI_COMMON_H_ */