BITS_PER_INDEX_STREAM
#define STREAM_MASK ((1 << BITS_PER_INDEX_STREAM) - 1)
streamNum = (*track_stream >> (i * BITS_PER_INDEX_STREAM)) &
shiftedValuesMask = (1 << i * BITS_PER_INDEX_STREAM) - 1 ;
BITS_PER_INDEX_STREAM);
indexValueMask = STREAM_MASK << i * BITS_PER_INDEX_STREAM;
((MAX_STREAMS_TRACKED - 1) * BITS_PER_INDEX_STREAM)) & STREAM_MASK;