From 872484ce40881e295b046adf21f7211306477751 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Sun, 25 Aug 2013 17:57:03 -0300 Subject: [media] v4l: Add timestamp source flags, mask and document them Some devices do not produce timestamps that correspond to the end of the frame. The user space should be informed on the matter. This patch achieves that by adding buffer flags (and a mask) for timestamp sources since more possible timestamping points are expected than just two. A three-bit mask is defined (V4L2_BUF_FLAG_TSTAMP_SRC_MASK) and two of the eight possible values is are defined V4L2_BUF_FLAG_TSTAMP_SRC_EOF for end of frame (value zero) V4L2_BUF_FLAG_TSTAMP_SRC_SOE for start of exposure (next value). Signed-off-by: Sakari Ailus Acked-by: Kamil Debski Acked-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- include/media/videobuf2-core.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/media/videobuf2-core.h') diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 3770be6e972d..bf6859ee46c3 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -312,6 +312,8 @@ struct v4l2_fh; * @buf_struct_size: size of the driver-specific buffer structure; * "0" indicates the driver doesn't want to use a custom buffer * structure type, so sizeof(struct vb2_buffer) will is used + * @timestamp_flags: Timestamp flags; V4L2_BUF_FLAGS_TIMESTAMP_* and + * V4L2_BUF_FLAGS_TSTAMP_SRC_* * @gfp_flags: additional gfp flags used when allocating the buffers. * Typically this is 0, but it may be e.g. GFP_DMA or __GFP_DMA32 * to force the buffer allocation to a specific memory zone. -- cgit v1.2.3