From: Boris Brezillon <boris.brezillon@collabora.com>
To: Jonas Karlman <jonas@kwiboo.se>
Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
Ezequiel Garcia <ezequiel@collabora.com>,
Hans Verkuil <hverkuil@xs4all.nl>,
Tomasz Figa <tfiga@chromium.org>,
"linux-media@vger.kernel.org" <linux-media@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 05/10] media: hantro: Reduce H264 extra space for motion vectors
Date: Thu, 31 Oct 2019 10:50:25 +0100 [thread overview]
Message-ID: <20191031105025.5a32113c@collabora.com> (raw)
In-Reply-To: <HE1PR06MB4011C972A372449941929026AC610@HE1PR06MB4011.eurprd06.prod.outlook.com>
On Tue, 29 Oct 2019 01:24:50 +0000
Jonas Karlman <jonas@kwiboo.se> wrote:
> A decoded 8-bit 4:2:0 frame need memory for up to 448 bytes per
> macroblock with additional 32 bytes on multi-core variants.
>
> Memory layout is as follow:
>
> +---------------------------+
> | Y-plane 256 bytes x MBs |
> +---------------------------+
> | UV-plane 128 bytes x MBs |
> +---------------------------+
> | MV buffer 64 bytes x MBs |
> +---------------------------+
> | MC sync 32 bytes |
> +---------------------------+
As for patch 4, can we point this diagram as a comment in the code too?
>
> Reduce the extra space allocated now that motion vector buffer offset no
> longer is based on the extra space.
>
> Only allocate extra space for 64 bytes x MBs of motion vector buffer
> and 32 bytes for multi-core sync.
>
> Fixes: a9471e25629b ("media: hantro: Add core bits to support H264 decoding")
> Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
> ---
> Changes in v2:
> - updated commit message
> ---
> drivers/staging/media/hantro/hantro_v4l2.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/staging/media/hantro/hantro_v4l2.c b/drivers/staging/media/hantro/hantro_v4l2.c
> index 3dae52abb96c..b3a4368b37de 100644
> --- a/drivers/staging/media/hantro/hantro_v4l2.c
> +++ b/drivers/staging/media/hantro/hantro_v4l2.c
> @@ -242,12 +242,12 @@ static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f,
> /*
> * The H264 decoder needs extra space on the output buffers
> * to store motion vectors. This is needed for reference
> - * frames.
> + * frames. 32 extra bytes is used for multi-core sync.
> */
> if (ctx->vpu_src_fmt->fourcc == V4L2_PIX_FMT_H264_SLICE)
> pix_mp->plane_fmt[0].sizeimage +=
> - 128 * DIV_ROUND_UP(pix_mp->width, 16) *
> - DIV_ROUND_UP(pix_mp->height, 16);
> + 64 * MB_WIDTH(pix_mp->width) *
> + MB_WIDTH(pix_mp->height) + 32;
> } else if (!pix_mp->plane_fmt[0].sizeimage) {
> /*
> * For coded formats the application can specify
next prev parent reply other threads:[~2019-10-31 9:50 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-29 1:23 [PATCH RFC v2 00/10] media: hantro: H264 fixes and improvements Jonas Karlman
2019-10-29 1:24 ` [PATCH v2 01/10] media: hantro: Fix H264 max frmsize supported on RK3288 Jonas Karlman
2019-10-31 8:52 ` Boris Brezillon
2019-11-01 8:36 ` Hans Verkuil
2019-11-05 7:56 ` Boris Brezillon
[not found] ` <20191029012430.24566-1-jonas@kwiboo.se>
2019-10-29 1:24 ` [PATCH v2 02/10] media: hantro: Fix motion vectors usage condition Jonas Karlman
2019-10-31 8:58 ` Boris Brezillon
2019-11-02 23:09 ` Ezequiel Garcia
2019-11-02 23:10 ` Ezequiel Garcia
2019-10-29 1:24 ` [PATCH v2 03/10] media: hantro: Fix picture order count table enable Jonas Karlman
2019-10-31 8:59 ` Boris Brezillon
2019-10-29 1:24 ` [PATCH v2 04/10] media: hantro: Fix H264 motion vector buffer offset Jonas Karlman
2019-10-31 9:47 ` Boris Brezillon
2019-10-29 1:24 ` [PATCH v2 05/10] media: hantro: Reduce H264 extra space for motion vectors Jonas Karlman
2019-10-31 9:50 ` Boris Brezillon [this message]
2019-10-29 1:24 ` [PATCH v2 06/10] media: hantro: Use capture buffer width and height for H264 decoding Jonas Karlman
2019-10-31 9:21 ` Boris Brezillon
2019-10-31 10:00 ` Jonas Karlman
2019-10-29 1:24 ` [PATCH v2 07/10] media: hantro: Remove now unused H264 pic_size Jonas Karlman
2019-10-31 9:53 ` Boris Brezillon
2019-10-29 1:26 ` [PATCH v2 08/10] media: hantro: Set H264 FIELDPIC_FLAG_E flag correctly Jonas Karlman
2019-10-31 10:00 ` Boris Brezillon
[not found] ` <20191029012550.24628-1-jonas@kwiboo.se>
2019-10-29 1:26 ` [RFC v2 09/10] media: uapi: h264: Add DPB entry field reference flags Jonas Karlman
2019-10-31 10:20 ` Boris Brezillon
2019-11-15 6:26 ` Jonas Karlman
2019-11-15 7:45 ` Boris Brezillon
2019-11-15 8:15 ` Jonas Karlman
2019-10-29 1:26 ` [RFC v2 10/10] media: hantro: Fix H264 decoding of field encoded content Jonas Karlman
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=20191031105025.5a32113c@collabora.com \
--to=boris.brezillon@collabora.com \
--cc=ezequiel@collabora.com \
--cc=hverkuil@xs4all.nl \
--cc=jonas@kwiboo.se \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=mchehab+samsung@kernel.org \
--cc=tfiga@chromium.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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).