From: Jernej Skrabec <jernej.skrabec@siol.net>
To: mchehab@kernel.org, hverkuil-cisco@xs4all.nl,
paul.kocialkowski@bootlin.com, mripard@kernel.org
Cc: pawel@osciak.com, m.szyprowski@samsung.com,
kyungmin.park@samsung.com, tfiga@chromium.org, wens@csie.org,
acourbot@chromium.org, gregkh@linuxfoundation.org,
jernej.skrabec@siol.net, linux-media@vger.kernel.org,
linux-kernel@vger.kernel.org, devel@driverdev.osuosl.org,
linux-arm-kernel@lists.infradead.org, ezequiel@collabora.com,
jonas@kwiboo.se
Subject: [PATCH 2/8] videodev2.h: add V4L2_DEC_CMD_FLUSH
Date: Thu, 22 Aug 2019 21:44:54 +0200 [thread overview]
Message-ID: <20190822194500.2071-3-jernej.skrabec@siol.net> (raw)
In-Reply-To: <20190822194500.2071-1-jernej.skrabec@siol.net>
From: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Add this new V4L2_DEC_CMD_FLUSH decoder command and document it.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst | 11 ++++++++++-
Documentation/media/videodev2.h.rst.exceptions | 1 +
include/uapi/linux/videodev2.h | 1 +
3 files changed, 12 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..0bffef6058f7 100644
--- a/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst
+++ b/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst
@@ -208,7 +208,16 @@ 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,
+ and only if ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF`` was set.
+ 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 last capture buffer containing the last decoded frame.
+ So this command can be used to explicitly flush that last decoded
+ frame.
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)
--
2.22.1
next prev parent reply other threads:[~2019-08-22 19:45 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-22 19:44 [PATCH 0/8] media: cedrus: h264: Support multi-slice frames Jernej Skrabec
2019-08-22 19:44 ` [PATCH 1/8] vb2: add V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF Jernej Skrabec
2019-08-22 19:44 ` Jernej Skrabec [this message]
2019-08-26 18:30 ` [PATCH 2/8] videodev2.h: add V4L2_DEC_CMD_FLUSH Boris Brezillon
2019-08-30 9:38 ` Alexandre Courbot
2019-08-30 9:44 ` Hans Verkuil
2019-08-30 9:48 ` Alexandre Courbot
2019-08-22 19:44 ` [PATCH 3/8] media: docs-rst: Document m2m stateless video decoder interface Jernej Skrabec
2019-08-22 19:44 ` [PATCH 4/8] media: docs-rst: Document memory-to-memory video encoder interface Jernej Skrabec
2019-08-22 19:44 ` [PATCH 5/8] media: cedrus: Detect first slice of a frame Jernej Skrabec
2019-08-26 18:28 ` Boris Brezillon
2019-08-26 18:47 ` Jernej Škrabec
2019-08-29 19:04 ` Jernej Škrabec
2019-08-30 5:48 ` Boris Brezillon
2019-08-30 17:19 ` Nicolas Dufresne
2019-08-30 7:28 ` Hans Verkuil
2019-08-22 19:44 ` [PATCH 6/8] media: cedrus: h264: Support multiple slices per frame Jernej Skrabec
2019-08-22 19:44 ` [PATCH 7/8] media: cedrus: Add support for holding capture buffer Jernej Skrabec
2019-08-26 18:38 ` Boris Brezillon
2019-08-29 11:23 ` Hans Verkuil
2019-09-04 23:14 ` Jernej Škrabec
2019-08-22 19:45 ` [PATCH 8/8] media: cedrus: Add support for V4L2_DEC_CMD_FLUSH Jernej Skrabec
2019-08-26 18:55 ` Boris Brezillon
2019-08-29 11:11 ` Hans Verkuil
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