From bac06ec36ea2012ff0daa9767d0f77bf9c6064ec Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Fri, 11 Oct 2019 06:32:42 -0300 Subject: [PATCH] media: videodev2.h: add V4L2_DEC_CMD_FLUSH Add this new V4L2_DEC_CMD_FLUSH decoder command and document it. Reviewed-by: Boris Brezillon Reviewed-by: Alexandre Courbot Signed-off-by: Hans Verkuil Signed-off-by: Jernej Skrabec Signed-off-by: Mauro Carvalho Chehab --- 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 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 diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 9f4e66affac4..d969842bbfe2 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -1984,6 +1984,7 @@ 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)