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MIDIIO
File
MIDIReader.hxx
Go to the documentation of this file.
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/*
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* Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
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* UNIVERSITAT POMPEU FABRA
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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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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* MIDIFileReader C++ classes
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* This code is part of the CLAM library, but also usable stand-alone.
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* Maarten de Boer <mdeboer@iua.upf.es>
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*
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*/
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#ifndef __MIDIReader__
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#define __MIDIReader__
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#include <stdio.h>
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#include <CLAM/MIDIDataTypes.hxx>
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#include "
MIDIChunkType.hxx
"
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namespace
MIDI
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{
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class
Song;
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class
Reader
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/* class to read midi data from a file, parse it and store it in a song;
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*/
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{
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private
:
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FILE* mFile;
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int
mCnt;
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public
:
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Reader
(
const
char
* filename)
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{
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mFile = fopen(filename,
"rb"
);
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}
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bool
Ok
(
void
)
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{
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return
mFile!=
NULL
;
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}
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Byte
GetByte
(
void
)
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{
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mCnt++;
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return
fgetc(mFile);
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}
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unsigned
int
GetInt
(
void
)
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{
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unsigned
int
val;
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val =
GetByte
();
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val <<=8;
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val |=
GetByte
();
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val <<=8;
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val |=
GetByte
();
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val <<=8;
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val |=
GetByte
();
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return
val;
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}
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unsigned
short
GetShort
(
void
)
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{
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unsigned
short
val;
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val =
GetByte
();
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val <<= 8;
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val |=
GetByte
();
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return
val;
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}
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ChunkType
GetChunkType
(
void
)
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{
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Byte
bytes[4];
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for
(
int
i=0;i<4;i++) bytes[i] =
GetByte
();
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return
ChunkType
(bytes);
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}
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unsigned
int
GetVarLength
(
void
)
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{
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/* read a variable lenght value. see midi file spec */
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unsigned
int
ret = 0;
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Byte
tmp;
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tmp =
GetByte
();
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ret = tmp&0x7F;
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while
(tmp&0x80)
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{
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tmp =
GetByte
();
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ret <<= 7;
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ret |= (tmp&0x7F);
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}
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return
ret;
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}
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class
Error
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{
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public
:
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const
char
*
mStr
;
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Error
(
const
char
* str):
mStr
(str) { printf(str); }
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};
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void
Read
(
Song
& s);
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};
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}
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#endif
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