diff options
Diffstat (limited to 'libavutil/adler32.c')
-rw-r--r-- | libavutil/adler32.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/libavutil/adler32.c b/libavutil/adler32.c index f4f56ea9b6..571242e1cb 100644 --- a/libavutil/adler32.c +++ b/libavutil/adler32.c @@ -23,6 +23,7 @@ #include "config.h" #include "adler32.h" +#include "common.h" #define BASE 65521L /* largest prime smaller than 65536 */ @@ -37,17 +38,22 @@ unsigned long av_adler32_update(unsigned long adler, const uint8_t * buf, unsigned long s2 = adler >> 16; while (len > 0) { + unsigned len2 = FFMIN((len-1) & ~15, 2048); + if (len2) { + len -= len2; + #if CONFIG_SMALL - while (len > 4 && s2 < (1U << 31)) { + while (len2 >= 4) { DO4(buf); - len -= 4; + len2 -= 4; } #else - while (len > 16 && s2 < (1U << 31)) { + while (len2 >= 16) { DO16(buf); - len -= 16; + len2 -= 16; } #endif + } DO1(buf); len--; s1 %= BASE; s2 %= BASE; |