Channel number, need 12 bit

[frenchfry164]

I'm using FMOD, and I am trying to retrieve the channel number that a sound is being played on. You find this by the return value of the function FSOUND_PlaySound(). The problem is, if I use an int it won't report the correct channel number, because the way the return value works. The first 12 bits is the channel number. I tried using a short int (which I think is 12 bit) and it doesn't work. I don't want to have to use a char, because that would limit me down to 256 channels, instead of 4096. Any ideas?

[joshdick]

Maybe a bitset with a specified number of bits?

[thefroggy]

Short ints are often 16 bits. Have you tried storing it in a short and then shifting 4 places to the right?

short i = FSOUND_PlaySound();
i >>= 4;

[frenchfry164]

Now it keeps reporting channel 256. The only way I can get it to report the correct channel number is to use a char.

It's not that important anyway, because I'll never use more than 256 channels at once (that's a lot of sound going on at once)

[Cat]

Originally posted by frenchfry164
I'm using FMOD, and I am trying to retrieve the channel number that a sound is being played on. You find this by the return value of the function FSOUND_PlaySound(). The problem is, if I use an int it won't report the correct channel number, because the way the return value works. The first 12 bits is the channel number. I tried using a short int (which I think is 12 bit) and it doesn't work. I don't want to have to use a char, because that would limit me down to 256 channels, instead of 4096. Any ideas?

The least significant 12 bits are the channel number? Just mask off the higher ones. E.g.:

int channel = FSOUND_PlaySound(/*...*/) & 0x0FFF;

This keeps the first 12 bits (bits 0-11) unchanged and zeros out all the higher order bits. (12-end).