Re: [Alsa-user] Raw Midi Bug?

[Maxime Chevalier-B. <max...@gm...>]

 >> Your program behaves as if it reads two bytes in each call. Please 
print out the value of "err" when it succeeds.

This is for one note on, one note off.

Opening MIDI input port: "virtual"
90
Bytes read: 1
Byte type size: 1
3C
Bytes read: 1
Byte type size: 1
80
Bytes read: 1
Byte type size: 1
00
Bytes read: 1
Byte type size: 1

 >> How exactly have you defined "byte"?

typedef unsigned char byte;

As I said this works perfectly in blocking mode when connected directly 
to hardware. It only fails when using a virtual raw midi port.

 >> How does the loop look like?

     // Open the MIDI input device
     if ((err = snd_rawmidi_open(&m_inHandle, NULL, devName.c_str(), 0)) 
< 0)
     {
         std::cout << "Can't open MIDI input: " << snd_strerror(err) << 
std::endl;
         return false;
     }

     while (true)
     {
         byte byteVal;

         int err;

         if ((err = snd_rawmidi_read(m_inHandle, &byteVal, 
sizeof(byteVal))) < 0)
         {
             std::cout << "Can't read MIDI input: " << snd_strerror(err) 
<< std::endl;
             exit(0);
         }

         std::cout << charToHex(byteVal) << std::endl;
         std::cout << "Bytes read: " << err << std::endl;
         std::cout << "Byte type size: " << sizeof(byteVal) << std::endl;
     }

- Maxime