[FFmpeg-devel] [FFmpeg-cvslog] avcodec/utvideodec: add vlc multi support

[Paul B Mahol]

On Fri, Sep 15, 2023 at 12:19 AM Michael Niedermayer <michael at niedermayer.cc>
wrote:

> On Wed, Sep 06, 2023 at 10:19:29PM +0000, Christophe Gisquet wrote:
> > ffmpeg | branch: master | Christophe Gisquet <
> christophe.gisquet at gmail.com> | Sun Jul  9 12:56:35 2017 +0000|
> [da888b790af779a7489068c25f9e7ab8ac653d41] | committer: Paul B Mahol
> >
> > avcodec/utvideodec: add vlc multi support
> >
> > Faster decoding, by average 50% faster overall.
> >
> > >
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=da888b790af779a7489068c25f9e7ab8ac653d41
> > ---
> >
> >  libavcodec/utvideo.h    |  1 +
> >  libavcodec/utvideodec.c | 92
> ++++++++++++++++++++++++-------------------------
> >  2 files changed, 46 insertions(+), 47 deletions(-)
> >
> > diff --git a/libavcodec/utvideo.h b/libavcodec/utvideo.h
> > index 9da9329ff3..e5160aa394 100644
> > --- a/libavcodec/utvideo.h
> > +++ b/libavcodec/utvideo.h
> > @@ -81,6 +81,7 @@ typedef struct UtvideoContext {
> >      ptrdiff_t slice_stride;
> >      uint8_t *slice_bits, *slice_buffer[4];
> >      int      slice_bits_size;
> > +    void    *buffer;
> >
> >      const uint8_t *packed_stream[4][256];
> >      size_t packed_stream_size[4][256];
> > diff --git a/libavcodec/utvideodec.c b/libavcodec/utvideodec.c
> > index 1f00c58950..ab390be0fa 100644
> > --- a/libavcodec/utvideodec.c
> > +++ b/libavcodec/utvideodec.c
> > @@ -46,7 +46,7 @@ typedef struct HuffEntry {
> >  } HuffEntry;
> >
> >  static int build_huff(UtvideoContext *c, const uint8_t *src, VLC *vlc,
> > -                      int *fsym, unsigned nb_elems)
> > +                      VLC_MULTI *multi, int *fsym, unsigned nb_elems)
> >  {
>
> before this patch the whole application finishes within 130ms
> after this patch with teh short table
>
>
> 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,24,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,24,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
>

This is of no use to me.
If you have file then provide it.


>
> this times out eventually not exiting the first call
> it always got stuck in many calls to add_level()
>
> thx
>
> [...]
> --
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
>
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