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#include <iostream> #include <windows.h> #include <mmsystem.h> #pragma comment ( lib, "winmm.lib" ) typedef unsigned char byte; typedef union { unsigned long word; unsigned char data[4]; } midi_msg; class midi { public: midi() { if( midiOutOpen( &device,

ÖMER MEMES answered on June 14, 2022 Popularity 1/10 Helpfulness 1/10

answer #include <iostream> #include <windows.h> #include <mmsystem.h> #pragma comment ( lib, "winmm.lib" ) typedef unsigned char byte; typedef union { unsigned long word; unsigned char data[4]; } midi_msg; class midi { public: midi() { if( midiOutOpen( &device,

#include <iostream> #include <windows.h> #include <mmsystem.h> #pragma comment ( lib, "winmm.lib" ) typedef unsigned char byte; typedef union { unsigned long word; unsigned char data[4]; } midi_msg; class midi { public: midi() { if( midiOutOpen( &device,

Comment

#include <iostream>
#include <windows.h>
#include <mmsystem.h>
 
#pragma comment ( lib, "winmm.lib" )
 
typedef unsigned char byte;
 
typedef union 
{ 
    unsigned long word; 
    unsigned char data[4]; 
}
midi_msg;
 
class midi
{
public:
    midi()
    {
	if( midiOutOpen( &device, 0, 0, 0, CALLBACK_NULL) != MMSYSERR_NOERROR ) 
	{
	    std::cout << "Error opening MIDI Output..." << std::endl;
	    device = 0;
	}
    }
    ~midi()
    {
	midiOutReset( device );
	midiOutClose( device );
    }
    bool isOpen() { return device != 0; }
    void setInstrument( byte i )
    {
	message.data[0] = 0xc0; message.data[1] = i;
	message.data[2] = 0; message.data[3] = 0;
	midiOutShortMsg( device, message.word );
    }
    void playNote( byte n, unsigned i )
    {
	playNote( n ); Sleep( i ); stopNote( n );
    }
 
private:
    void playNote( byte n )
    {
	message.data[0] = 0x90; message.data[1] = n;
	message.data[2] = 127; message.data[3] = 0;
	midiOutShortMsg( device, message.word );
    }
    void stopNote( byte n )
    {
	message.data[0] = 0x90; message.data[1] = n;
	message.data[2] = 0; message.data[3] = 0;
	midiOutShortMsg( device, message.word );
    }
    HMIDIOUT device;
    midi_msg message;
};
 
int main( int argc, char* argv[] )
{
    midi m;
    if( m.isOpen() )
    {
	byte notes[] = { 60, 62, 64, 65, 67, 69, 71, 72 };
	m.setInstrument( 42 );
	for( int x = 0; x < 8; x++ )
	    m.playNote( notes[x], rand() % 100 + 158 );
	Sleep( 1000 );
    }
    return 0;
}

Popularity 1/10 Helpfulness 1/10 Language cpp

Source: rosettacode.org

Tags: c++ class midi typedef union unsigned unsigned-char

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Contributed on Jun 14 2022

ÖMER MEMES

0 Answers Avg Quality 2/10

#include <iostream> #include <windows.h> #include <mmsystem.h> #pragma comment ( lib, "winmm.lib" ) typedef unsigned char byte; typedef union { unsigned long word; unsigned char data[4]; } midi_msg; class midi { public: midi() { if( midiOutOpen( &device,

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#include <iostream> #include <windows.h> #include <mmsystem.h> #pragma comment ( lib, "winmm.lib" ) typedef unsigned char byte; typedef union { unsigned long word; unsigned char data[4]; } midi_msg; class midi { public: midi() { if( midiOutOpen( &device,

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