In some decoing scenarios, application may queue a buffer
that only contains codec config data, and the driver needs to
know whether is it a frame or not.
So we add a buf flag to tell this case.
Signed-off-by: Ming Qian <ming.qian@xxxxxxx>
Signed-off-by: Shijie Qin <shijie.qin@xxxxxxx>
Signed-off-by: Zhou Peng <eagle.zhou@xxxxxxx>
---
Documentation/userspace-api/media/v4l/buffer.rst | 8 ++++++++
include/uapi/linux/videodev2.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/Documentation/userspace-api/media/v4l/buffer.rst b/Documentation/userspace-api/media/v4l/buffer.rst
index 4f95496adc5b..7f32c5fd6b11 100644
--- a/Documentation/userspace-api/media/v4l/buffer.rst
+++ b/Documentation/userspace-api/media/v4l/buffer.rst
@@ -611,6 +611,14 @@ Buffer Flags
the format. Any Any subsequent call to the
:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl will not block anymore,
but return an ``EPIPE`` error code.
+ * .. _`V4L2-BUF-FLAG-CODECCONFIG`:
+
+ - ``V4L2_BUF_FLAG_CODECCONFIG``
+ - 0x00200000
+ - The buffer only contains codec config data, eg. sps and pps.
+ Applications can set this bit when ``type`` refers to an output
+ stream, this flag is usually used by v4l2 decoder.
+
* .. _`V4L2-BUF-FLAG-REQUEST-FD`:
- ``V4L2_BUF_FLAG_REQUEST_FD``
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 4836590a690c..242731cb6556 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1110,6 +1110,7 @@ static inline __u64 v4l2_timeval_to_ns(const struct timeval *tv)
#define V4L2_BUF_FLAG_TSTAMP_SRC_SOE 0x00010000
/* mem2mem encoder/decoder */
#define V4L2_BUF_FLAG_LAST 0x00100000
+#define V4L2_BUF_FLAG_CODECCONFIG 0x00200000
/* request_fd is valid */
#define V4L2_BUF_FLAG_REQUEST_FD 0x00800000
--
2.32.0
