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| author | James Almer <jamrial@gmail.com> | 2013-06-01 01:36:38 -0300 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-06-01 10:53:39 +0200 |
| commit | c485c835fef46dea5dddf66243954275291dcdee (patch) | |
| tree | 56b9773068323f60d0dcbc7f9563d4cc96bfe5cd | |
| parent | 0c2f673ed28ab6d187b4ce41396623f9e9378785 (diff) | |
| download | ffmpeg-c485c835fef46dea5dddf66243954275291dcdee.tar.gz | |
avutil/crc: Dont limit CRC32 standard tables
Currently, standard tables like AV_CRC_32_IEEE and such are being generated (or
provided in case the user compiles with hardcoded tables) with only 257 elements.
We're missing a considerable boost in performance by not making them with a size
of 1024 elements instead.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavutil/crc.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libavutil/crc.c b/libavutil/crc.c index 9ee5efe9db..51fc83b0b5 100644 --- a/libavutil/crc.c +++ b/libavutil/crc.c @@ -211,6 +211,11 @@ static const AVCRC av_crc_table[AV_CRC_MAX][257] = { }, }; #else +#if CONFIG_SMALL +#define CRC_TABLE_SIZE 257 +#else +#define CRC_TABLE_SIZE 1024 +#endif static struct { uint8_t le; uint8_t bits; @@ -222,7 +227,7 @@ static struct { [AV_CRC_32_IEEE] = { 0, 32, 0x04C11DB7 }, [AV_CRC_32_IEEE_LE] = { 1, 32, 0xEDB88320 }, }; -static AVCRC av_crc_table[AV_CRC_MAX][257]; +static AVCRC av_crc_table[AV_CRC_MAX][CRC_TABLE_SIZE]; #endif int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size) |