[FFmpeg-devel] [PATCH] dirac: make initialization of arithmetic coder tables threadsafe.

Ronald S. Bultje rsbultje at gmail.com
Mon Mar 27 18:24:08 EEST 2017


Hi,

On Mon, Mar 27, 2017 at 11:10 AM, Michael Niedermayer <
michael at niedermayer.cc> wrote:

> On Mon, Mar 27, 2017 at 10:09:05AM -0400, Ronald S. Bultje wrote:
> > ---
> >  libavcodec/dirac_arith.c | 17 +++++++++++------
> >  libavcodec/dirac_arith.h |  1 +
> >  libavcodec/diracdec.c    |  9 ++++++++-
> >  3 files changed, 20 insertions(+), 7 deletions(-)
> >
> > diff --git a/libavcodec/dirac_arith.c b/libavcodec/dirac_arith.c
> > index bf91392..49c0909 100644
> > --- a/libavcodec/dirac_arith.c
> > +++ b/libavcodec/dirac_arith.c
> > @@ -83,9 +83,19 @@ const uint8_t ff_dirac_next_ctx[DIRAC_CTX_COUNT] = {
> >
> >  int16_t ff_dirac_prob_branchless[256][2];
> >
> > -void ff_dirac_init_arith_decoder(DiracArith *c, GetBitContext *gb, int
> length)
> > +av_cold void ff_dirac_init_arith_tables(void)
> >  {
> >      int i;
> > +
> > +    for (i = 0; i < 256; i++) {
> > +        ff_dirac_prob_branchless[i][0] =  ff_dirac_prob[255-i];
> > +        ff_dirac_prob_branchless[i][1] = -ff_dirac_prob[i];
> > +    }
> > +}
> > +
> > +void ff_dirac_init_arith_decoder(DiracArith *c, GetBitContext *gb, int
> length)
> > +{
> > +    int i, ret;
>
> ret seems unused


Will remove locally.

Ronald


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