Slim numerical data compression 1.0
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Include file for the bitstream and derived classes. More...
#include <stdint.h>
#include <cstdio>
#include "bit_constants.h"
Go to the source code of this file.
Classes | |
class | bitstream |
Bit stream base class. More... | |
class | obitstream |
Output bit stream. More... | |
class | ibitstream |
Input bit stream. More... | |
Functions | |
static unsigned int | bit_size (int32_t i) |
Find size (on [0,32]) of the smallest # that can hold the integer i. | |
static unsigned int | bit_size (unsigned int u) |
Find size (on [1,32]) of the smallest # that can hold the unsigned int u. | |
Include file for the bitstream and derived classes.
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inlinestatic |
Find size (on [0,32]) of the smallest # that can hold the integer i.
By our convention, [-1,0] require 1 bit, [-2,1] require 2 bits, [-4,-3, 2,3] require 3 bits, etc. This was implemented as loops, but we find we save a lot of compute cycles by laying it out as an explicit tree of tests.
i | The number whose size is being checked. |
Referenced by mexp_golomb_write().
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inlinestatic |
Find size (on [1,32]) of the smallest # that can hold the unsigned int u.
By our convention, [0,1] require 1 bit, [2,3] require 2 bits, [4,5, 6,7] require 3 bits, etc.
u | The number whose size is being checked. |