From: Christophe Gisquet <christophe.gisquet@gmail.com>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH] avcodec/hevcdsp: Offset ff_hevc_.pel_filters to simplify addressing
Date: Sun, 11 Feb 2024 22:48:10 +0100
Message-ID: <CAPYFPM17gc8QQtgf756q-rP4SU4iokHpppppnCr9yT3MipAXKg@mail.gmail.com> (raw)
In-Reply-To: <CAFXK13ePq529usZzu6BFaDgtChGjhb7s-GwSTZRZqBVbbpF0DQ@mail.gmail.com>
Le dim. 11 févr. 2024 à 12:37, Nuo Mi <nuomi2021@gmail.com> a écrit :
> > -DECLARE_ALIGNED(16, const int8_t, ff_hevc_qpel_filters)[3][16] = {
> > +DECLARE_ALIGNED(16, const int8_t, ff_hevc_qpel_filters)[4][16] = {
> >
> Do you know why this is [4][16]? [4][8] should suffice.
Probably so that all coefficient banks are aligned. Another use for it
is you can directly use the address in some instruction instead of
using/wasting a reg for holding the data.
--
Christophe Gisquet
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
next prev parent reply other threads:[~2024-02-11 21:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-11 8:23 Andreas Rheinhardt
2024-02-11 11:36 ` Nuo Mi
2024-02-11 21:48 ` Christophe Gisquet [this message]
2024-02-13 2:51 ` Nuo Mi
2024-02-11 11:47 ` Nuo Mi
2024-02-13 2:54 ` Nuo Mi
2024-02-13 23:26 ` James Almer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAPYFPM17gc8QQtgf756q-rP4SU4iokHpppppnCr9yT3MipAXKg@mail.gmail.com \
--to=christophe.gisquet@gmail.com \
--cc=ffmpeg-devel@ffmpeg.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Git Inbox Mirror of the ffmpeg-devel mailing list - see https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
This inbox may be cloned and mirrored by anyone:
git clone --mirror https://master.gitmailbox.com/ffmpegdev/0 ffmpegdev/git/0.git
# If you have public-inbox 1.1+ installed, you may
# initialize and index your mirror using the following commands:
public-inbox-init -V2 ffmpegdev ffmpegdev/ https://master.gitmailbox.com/ffmpegdev \
ffmpegdev@gitmailbox.com
public-inbox-index ffmpegdev
Example config snippet for mirrors.
AGPL code for this site: git clone https://public-inbox.org/public-inbox.git