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| author | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2019-10-11 06:32:42 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-10-21 07:39:50 -0300 |
| commit | bac06ec36ea2012ff0daa9767d0f77bf9c6064ec (patch) | |
| tree | ff5a59276ac48bcf8e3c01def6e8deeeaf9aed02 /Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst | |
| parent | f8cca8c97a63d77f48334cde81d15014f43530ef (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/media/uapi/v4l/vidioc-decoder-cmd.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst | 10 |
1 files changed, 9 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 ============ |