adler32.h File Reference

#include <stdint.h>
#include "common.h"

Go to the source code of this file.

Functions
unsigned long	av_adler32_update (unsigned long adler, const uint8_t *buf, unsigned int len) av_pure

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Function Documentation

unsigned long av_adler32_update	(	unsigned long	adler,
		const uint8_t *	buf,
		unsigned int	len
	)

Definition at line 32 of file adler32.c.

References av_adler32_update(), av_log(), AV_LOG_DEBUG, av_log_level, BASE, DO1, DO16, DO4, main(), NULL, s1, s2, START_TIMER, and STOP_TIMER.

Referenced by av_adler32_update(), crc_write_packet(), and framecrc_write_packet().

{
    unsigned long s1 = adler & 0xffff;
    unsigned long s2 = adler >> 16;

    while (len>0) {
#ifdef CONFIG_SMALL
        while(len>4 && s2 < (1U<<31)){
            DO4(buf); len-=4;
#else
        while(len>16 && s2 < (1U<<31)){
            DO16(buf); len-=16;
#endif
        }
        DO1(buf); len--;
        s1 %= BASE;
        s2 %= BASE;
    }
    return (s2 << 16) | s1;
}

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