On Thu 24 January 2013 13:35:05 Kamil Debski wrote:
> Define video buffer flag for the COPY timestamp. In this case the timestamp
> value is copied from the OUTPUT to the corresponding CAPTURE buffer.
>
> Signed-off-by: Kamil Debski <k.debski@xxxxxxxxxxx>
> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> ---
> Documentation/DocBook/media/v4l/io.xml | 6 ++++++
> include/uapi/linux/videodev2.h | 1 +
> 2 files changed, 7 insertions(+)
>
> diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml
> index 73f202f..fdd1822 100644
> --- a/Documentation/DocBook/media/v4l/io.xml
> +++ b/Documentation/DocBook/media/v4l/io.xml
> @@ -1145,6 +1145,12 @@ in which case caches have not been used.</entry>
> same clock outside V4L2, use
> <function>clock_gettime(2)</function> .</entry>
> </row>
> + <row>
> + <entry><constant>V4L2_BUF_FLAG_TIMESTAMP_COPY</constant></entry>
> + <entry>0x4000</entry>
> + <entry>The CAPTURE buffer timestamp has been taken from the
> + corresponding OUTPUT buffer.</entry>
> + </row>
I think I mentioned it before somewhere, but it is helpful if it is mentioned
here that this only applies to mem2mem devices.
Regards,
Hans
> </tbody>
> </tgroup>
> </table>
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 72e9921..d5a59af 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -697,6 +697,7 @@ struct v4l2_buffer {
> #define V4L2_BUF_FLAG_TIMESTAMP_MASK 0xe000
> #define V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN 0x0000
> #define V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC 0x2000
> +#define V4L2_BUF_FLAG_TIMESTAMP_COPY 0x4000
>
> /**
> * struct v4l2_exportbuffer - export of video buffer as DMABUF file descriptor
>
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