From: Jernej Skrabec <jernej.skrabec@siol.net>
To: mchehab@kernel.org, hverkuil-cisco@xs4all.nl,
paul.kocialkowski@bootlin.com, mripard@kernel.org,
pawel@osciak.com, m.szyprowski@samsung.com,
kyungmin.park@samsung.com, tfiga@chromium.org, wens@csie.org
Cc: devel@driverdev.osuosl.org, jernej.skrabec@siol.net,
Alexandre Courbot <acourbot@chromium.org>,
jonas@kwiboo.se, gregkh@linuxfoundation.org,
linux-kernel@vger.kernel.org, boris.brezillon@collabora.com,
ezequiel@collabora.com, linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org
Subject: [PATCH v2 2/6] videodev2.h: add V4L2_DEC_CMD_FLUSH
Date: Sun, 29 Sep 2019 22:00:19 +0200 [thread overview]
Message-ID: <20190929200023.215831-3-jernej.skrabec@siol.net> (raw)
In-Reply-To: <20190929200023.215831-1-jernej.skrabec@siol.net>
From: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Add this new V4L2_DEC_CMD_FLUSH decoder command and document it.
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Alexandre Courbot <acourbot@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[Adjusted description]
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst | 10 +++++++++-
Documentation/media/videodev2.h.rst.exceptions | 1 +
include/uapi/linux/videodev2.h | 1 +
3 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst b/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst
index 57f0066f4cff..f1a504836f31 100644
--- a/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst
+++ b/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst
@@ -208,7 +208,15 @@ introduced in Linux 3.3. They are, however, mandatory for stateful mem2mem decod
been started yet, the driver will return an ``EPERM`` error code. When
the decoder is already running, this command does nothing. No
flags are defined for this command.
-
+ * - ``V4L2_DEC_CMD_FLUSH``
+ - 4
+ - Flush any held capture buffers. Only valid for stateless decoders.
+ This command is typically used when the application reached the
+ end of the stream and the last output buffer had the
+ ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag set. This would prevent
+ dequeueing the capture buffer containing the last decoded frame.
+ So this command can be used to explicitly flush that final decoded
+ frame. This command does nothing if there are no held capture buffers.
Return Value
============
diff --git a/Documentation/media/videodev2.h.rst.exceptions b/Documentation/media/videodev2.h.rst.exceptions
index adeb6b7a15cb..a79028e4d929 100644
--- a/Documentation/media/videodev2.h.rst.exceptions
+++ b/Documentation/media/videodev2.h.rst.exceptions
@@ -434,6 +434,7 @@ replace define V4L2_DEC_CMD_START decoder-cmds
replace define V4L2_DEC_CMD_STOP decoder-cmds
replace define V4L2_DEC_CMD_PAUSE decoder-cmds
replace define V4L2_DEC_CMD_RESUME decoder-cmds
+replace define V4L2_DEC_CMD_FLUSH decoder-cmds
replace define V4L2_DEC_CMD_START_MUTE_AUDIO decoder-cmds
replace define V4L2_DEC_CMD_PAUSE_TO_BLACK decoder-cmds
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 4fa9f543742d..91a79e16089c 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1978,6 +1978,7 @@ struct v4l2_encoder_cmd {
#define V4L2_DEC_CMD_STOP (1)
#define V4L2_DEC_CMD_PAUSE (2)
#define V4L2_DEC_CMD_RESUME (3)
+#define V4L2_DEC_CMD_FLUSH (4)
/* Flags for V4L2_DEC_CMD_START */
#define V4L2_DEC_CMD_START_MUTE_AUDIO (1 << 0)
--
2.23.0
_______________________________________________
devel mailing list
devel@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
next prev parent reply other threads:[~2019-09-29 20:01 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-29 20:00 [PATCH v2 0/6] media: cedrus: h264: Support multi-slice frames Jernej Skrabec
2019-09-29 20:00 ` [PATCH v2 1/6] vb2: add V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF Jernej Skrabec
2019-09-29 20:00 ` Jernej Skrabec [this message]
2019-09-29 20:00 ` [PATCH v2 3/6] media: v4l2-mem2mem: add stateless_(try_)decoder_cmd ioctl helpers Jernej Skrabec
2019-10-04 9:21 ` Hans Verkuil
2019-10-07 6:02 ` Jernej Škrabec
2019-10-07 8:32 ` Hans Verkuil
2019-10-07 9:44 ` Hans Verkuil
2019-09-29 20:00 ` [PATCH v2 4/6] media: cedrus: Detect first slice of a frame Jernej Skrabec
2019-09-29 20:00 ` [PATCH v2 5/6] media: cedrus: h264: Support multiple slices per frame Jernej Skrabec
2019-09-29 20:00 ` [PATCH v2 6/6] media: cedrus: Add support for holding capture buffer Jernej Skrabec
2019-09-30 8:14 ` Hans Verkuil
2019-09-30 16:44 ` Jernej Škrabec
2019-09-30 8:10 ` [PATCH v2 0/6] media: cedrus: h264: Support multi-slice frames Hans Verkuil
2019-09-30 22:27 ` Jernej Škrabec
2019-09-30 22:43 ` Hans Verkuil
2019-09-30 22:58 ` Jernej Škrabec
2019-10-01 5:33 ` Jernej Škrabec
2019-10-07 10:44 ` Hans Verkuil
2019-10-07 19:01 ` Jernej Škrabec
2019-10-09 10:18 ` Hans Verkuil
2019-10-09 14:44 ` Jernej Škrabec
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=20190929200023.215831-3-jernej.skrabec@siol.net \
--to=jernej.skrabec@siol.net \
--cc=acourbot@chromium.org \
--cc=boris.brezillon@collabora.com \
--cc=devel@driverdev.osuosl.org \
--cc=ezequiel@collabora.com \
--cc=gregkh@linuxfoundation.org \
--cc=hverkuil-cisco@xs4all.nl \
--cc=jonas@kwiboo.se \
--cc=kyungmin.park@samsung.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=m.szyprowski@samsung.com \
--cc=mchehab@kernel.org \
--cc=mripard@kernel.org \
--cc=paul.kocialkowski@bootlin.com \
--cc=pawel@osciak.com \
--cc=tfiga@chromium.org \
--cc=wens@csie.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).