Question

hi guys can you explain what does that greater than sign do in the follwing code

 if (header->mode > forceMode)
      {
        *rate >>= (header->mode - forceMode); //What does this mean >>=
         *granule_frame_size <<= (header->mode - forceMode); //What does this mean <<=
      }

Answer 1

While all the answers above are correct, it’s possible you might still not understand it. You will need to understand binary.

Imagine you have the expression

7 << 2

That means “Convert 7 into binary, then shift all the bits left 2 times.”

So 7 is 00000111

shifted left twice (and inserting zeros) yeilds:

00011100

This is equal to 28.

So if the variable A is 7, and B is 2, then:

A <<= B;

Leaves A equal to 28;