Function parseReverseBitTree [src]

Prototype

 pub fn parseReverseBitTree( self: *RangeDecoder, reader: *Reader, num_bits: u5, probs: []u16, offset: usize, n_read: *u64, ) !u32

Parameters

self: *RangeDecoderreader: *Readernum_bits: u5probs: []u16offset: usizen_read: *u64

Source

  pub fn parseReverseBitTree(
    self: *RangeDecoder,
    reader: *Reader,
    num_bits: u5,
    probs: []u16,
    offset: usize,
    n_read: *u64,
) !u32 {
    var result: u32 = 0;
    var tmp: usize = 1;
    var i: @TypeOf(num_bits) = 0;
    while (i < num_bits) : (i += 1) {
        const bit = @intFromBool(try self.decodeBit(reader, &probs[offset + tmp], n_read));
        tmp = (tmp << 1) ^ bit;
        result ^= @as(u32, bit) << i;
    }
    return result;
}  