[PATCH v5 03/14] media:Add v4l2 buf flag codec data.
From: Ming Qian <ming.qian@nxp.com>
Date: 2021-07-27 03:21:48
Also in:
linux-arm-kernel, linux-devicetree, lkml
Subsystem:
media input infrastructure (v4l/dvb), the rest · Maintainers:
Mauro Carvalho Chehab, Linus Torvalds
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@nxp.com> Signed-off-by: Shijie Qin <redacted> Signed-off-by: Zhou Peng <eagle.zhou@nxp.com> --- 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