@@ -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
============
@@ -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
@@ -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)
Add this new V4L2_DEC_CMD_FLUSH decoder command and document it. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> --- 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(-)