path: root/Documentation
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authorHans Verkuil <hverkuil-cisco@xs4all.nl>2019-10-11 06:32:42 -0300
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>2019-10-21 07:39:50 -0300
commitbac06ec36ea2012ff0daa9767d0f77bf9c6064ec (patch)
treeff5a59276ac48bcf8e3c01def6e8deeeaf9aed02 /Documentation
parentf8cca8c97a63d77f48334cde81d15014f43530ef (diff)
media: videodev2.h: add V4L2_DEC_CMD_FLUSH
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> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'Documentation')
2 files changed, 10 insertions, 1 deletions
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 b58e381bdf7b..c23e5ef30c78 100644
--- a/Documentation/media/videodev2.h.rst.exceptions
+++ b/Documentation/media/videodev2.h.rst.exceptions
@@ -435,6 +435,7 @@ 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

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