codec.crc ≡

template <
    auto Width,
    uint<Width> P,
    uint<Width> Init,
    uint<Width> XorOut,
    bool ReflectInput,
    bool ReflectOutput,
    auto MaxBytes,
    auto ThreadCount
    >
class crc_calculator §source

Cyclic Redundancy Check (CRC) computation

Example CRC-32 with 64-bytes/cycle input width and 4 simultaneous input streams:

crc_calculator<32, 0xEDB88320, 0xFFFFFFFF, 0xFFFFFFFF, true, true, 64, 4> crc_calc;

Parameters

```
auto Width
```
Width (in bits) of the computed CRC.
```
uint<Width> P
```
The reversed polynomial.
```
uint<Width> Init
```
The initial value of CRC.
```
uint<Width> XorOut
```
The value to XOR with the final result.
```
bool ReflectInput
```
Whether to reverse the bits of each input byte.
```
bool ReflectOutput
```
Whether to reverse the bits of the CRC output result.
```
auto MaxBytes
```
The maximum number of bytes that can be processed per call.
```
auto ThreadCount
```
Number of CRC values that can be computed concurrently.

Methods

inline 
uint<Width>
compute(
    count_t<ThreadCount> identifier,
    uint8[MaxBytes] input,
    count_t<MaxBytes> input_bytes,
    bool reset
    ) §source

Process up to MaxBytes of new input data.

Arguments

```
count_t<ThreadCount> identifier
```
Which of the ThreadCount CRCs to update.
```
uint8[MaxBytes] input
```
Input data.
```
count_t<MaxBytes> input_bytes
```
Number of valid bytes in the input data.
```
bool reset
```
Indicates if CRC value should be reset before processing input. Should be set to true on the first call associated with a particular input stream.

Index

codec.crc ≡