On 09/02/2016 01:01 PM, Michael Niedermayer wrote:
On Fri, Sep 02, 2016 at 10:19:23AM -0700, Jonathan Campbell wrote:
[...]
CRC computation isn't fast enough? What should I use then? A sum of
byte values?
av_lfg_init() calls av_md5_sum()
av_md5_sum() is too slow to be called per ac3 frame
[...]
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Then for this to work at better performance, I'm going to have to either
directly modify the AVLFG struct state (probably not a good idea), or
add a function to libavutil/lfg.c that allows "fast seeding" without the
use of MD5 which could probably be something as simple as copy the
32-bit seed 16 times through c->state[] with or without modification
during the loop. Sound good?
Jonathan Campbell
CASTUS
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