From: caleb
---
libavcodec/Makefile|2 +-
libavcodec/jpeg2000.h |3 +
libavcodec/jpeg2000dec.c | 69 +-
libavcodec/jpeg2000htdec.c | 1425
libavcodec/jpeg2000htdec.h | 28 +
5 files changed, 1511 insertions(+), 16 deletions(-)
crea
From: caleb
This patch adds support for HTJ2K decoding in FFMPEG.
This is a revised patch with suggested changes from earlier and fixes some
bugs that were in the first version.
The paper describing HTJ2K can be found at
https://htj2k.com/wp-content/uploads/white-paper.pdf
---
libavcodec/Mak
On Fri, Dec 2, 2022 at 10:46 AM Tomas Härdin wrote:
>
> fre 2022-12-02 klockan 21:11 +0300 skrev etemesica...@gmail.com:
> >
> > +/**
> > + * Given a precomputed c, checks whether n % d == 0
> > + */
> > +static av_always_inline uint32_t is_divisible(uint32_t n, uint64_t
> > c)
> > +{
> > +re
mån 2022-12-12 klockan 10:40 -0800 skrev Pierre-Anthony Lemieux:
>
> I suggest keeping optimizations as a second step, and instead
> focusing
> on accuracy of decoding so that we end-up with a good baseline.
I didn't check this yet since I'm busy with other projects, but if what
Caleb told me abo
fre 2022-12-02 klockan 21:11 +0300 skrev etemesica...@gmail.com:
>
> +/**
> + * Given a precomputed c, checks whether n % d == 0
> + */
> +static av_always_inline uint32_t is_divisible(uint32_t n, uint64_t
> c)
> +{
> + return n * c <= c - 1;
> +}
This looks like something that could go in la
Hi
For bit-reading,
1. The spec has some chunks read from back to front,I didn't see that
functionality present in get_bits.h(which I assumed contained the bit
reading API).
2. It doesn't handle unstuffing correctly.
3. Doesn't handle EOB correctly, the spec has some arrays when there are no
more
Also thanks for reviewing
On Fri, Dec 2, 2022 at 10:34 PM Caleb Etemesi
wrote:
> Hi
>
> For bit-reading,
> 1. The spec has some chunks read from back to front,I didn't see that
> functionality present in get_bits.h(which I assumed contained the bit
> reading API).
> 2. It doesn't handle unstuffi
