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[media] v4l: Use full 32 bits for buffer flags 

The buffer flags field is 32 bits but the defined only used 16. This is
fine, but as more than 16 bits will be used in the very near future, define
them as 32-bit numbers for consistency.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Sakari Ailus 2013-08-25 14:00:43 -03:00 committed by Mauro Carvalho Chehab
parent c6c092135d
commit 939f1377fb
2 changed files with 38 additions and 30 deletions
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30
Documentation/DocBook/media/v4l/io.xml
View File

@ -990,7 +990,7 @@ should set this to 0.</entry>
<tbody valign="top">
<row>
<entry><constant>V4L2_BUF_FLAG_MAPPED</constant></entry>
<entry>0x0001</entry>
<entry>0x00000001</entry>
<entry>The buffer resides in device memory and has been mapped
into the application's address space, see <xref linkend="mmap" /> for details.
Drivers set or clear this flag when the
@ -1000,7 +1000,7 @@ Drivers set or clear this flag when the
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_QUEUED</constant></entry>
<entry>0x0002</entry>
<entry>0x00000002</entry>
<entry>Internally drivers maintain two buffer queues, an
incoming and outgoing queue. When this flag is set, the buffer is
currently on the incoming queue. It automatically moves to the
@ -1013,7 +1013,7 @@ cleared.</entry>
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_DONE</constant></entry>
<entry>0x0004</entry>
<entry>0x00000004</entry>
<entry>When this flag is set, the buffer is currently on
the outgoing queue, ready to be dequeued from the driver. Drivers set
or clear this flag when the <constant>VIDIOC_QUERYBUF</constant> ioctl
@ -1027,7 +1027,7 @@ state, in the application domain to say so.</entry>
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_ERROR</constant></entry>
<entry>0x0040</entry>
<entry>0x00000040</entry>
<entry>When this flag is set, the buffer has been dequeued
successfully, although the data might have been corrupted.
This is recoverable, streaming may continue as normal and
@ -1037,7 +1037,7 @@ state, in the application domain to say so.</entry>
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_KEYFRAME</constant></entry>
<entry>0x0008</entry>
<entry>0x00000008</entry>
<entry>Drivers set or clear this flag when calling the
<constant>VIDIOC_DQBUF</constant> ioctl. It may be set by video
capture devices when the buffer contains a compressed image which is a
@ -1045,27 +1045,27 @@ key frame (or field), &ie; can be decompressed on its own.</entry>
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_PFRAME</constant></entry>
<entry>0x0010</entry>
<entry>0x00000010</entry>
<entry>Similar to <constant>V4L2_BUF_FLAG_KEYFRAME</constant>
this flags predicted frames or fields which contain only differences to a
previous key frame.</entry>
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_BFRAME</constant></entry>
<entry>0x0020</entry>
<entry>0x00000020</entry>
<entry>Similar to <constant>V4L2_BUF_FLAG_PFRAME</constant>
this is a bidirectional predicted frame or field. [ooc tbd]</entry>
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_TIMECODE</constant></entry>
<entry>0x0100</entry>
<entry>0x00000100</entry>
<entry>The <structfield>timecode</structfield> field is valid.
Drivers set or clear this flag when the <constant>VIDIOC_DQBUF</constant>
ioctl is called.</entry>
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_PREPARED</constant></entry>
<entry>0x0400</entry>
<entry>0x00000400</entry>
<entry>The buffer has been prepared for I/O and can be queued by the
application. Drivers set or clear this flag when the
<link linkend="vidioc-querybuf">VIDIOC_QUERYBUF</link>, <link
@ -1075,7 +1075,7 @@ application. Drivers set or clear this flag when the
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_NO_CACHE_INVALIDATE</constant></entry>
<entry>0x0800</entry>
<entry>0x00000800</entry>
<entry>Caches do not have to be invalidated for this buffer.
Typically applications shall use this flag if the data captured in the buffer
is not going to be touched by the CPU, instead the buffer will, probably, be
@ -1084,7 +1084,7 @@ passed on to a DMA-capable hardware unit for further processing or output.
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_NO_CACHE_CLEAN</constant></entry>
<entry>0x1000</entry>
<entry>0x00001000</entry>
<entry>Caches do not have to be cleaned for this buffer.
Typically applications shall use this flag for output buffers if the data
in this buffer has not been created by the CPU but by some DMA-capable unit,
@ -1092,7 +1092,7 @@ in which case caches have not been used.</entry>
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_TIMESTAMP_MASK</constant></entry>
<entry>0xe000</entry>
<entry>0x0000e000</entry>
<entry>Mask for timestamp types below. To test the
timestamp type, mask out bits not belonging to timestamp
type by performing a logical and operation with buffer
@ -1100,7 +1100,7 @@ in which case caches have not been used.</entry>
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN</constant></entry>
<entry>0x0000</entry>
<entry>0x00000000</entry>
<entry>Unknown timestamp type. This type is used by
drivers before Linux 3.9 and may be either monotonic (see
below) or realtime (wall clock). Monotonic clock has been
@ -1113,7 +1113,7 @@ in which case caches have not been used.</entry>
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC</constant></entry>
<entry>0x2000</entry>
<entry>0x00002000</entry>
<entry>The buffer timestamp has been taken from the
<constant>CLOCK_MONOTONIC</constant> clock. To access the
same clock outside V4L2, use
@ -1121,7 +1121,7 @@ in which case caches have not been used.</entry>
</row>
<row>
<entry><constant>V4L2_BUF_FLAG_TIMESTAMP_COPY</constant></entry>
<entry>0x4000</entry>
<entry>0x00004000</entry>
<entry>The CAPTURE buffer timestamp has been taken from the
corresponding OUTPUT buffer. This flag applies only to mem2mem devices.</entry>
</row>

38
include/uapi/linux/videodev2.h
View File

@ -674,24 +674,32 @@ struct v4l2_buffer {
};
/* Flags for 'flags' field */
#define V4L2_BUF_FLAG_MAPPED 0x0001 /* Buffer is mapped (flag) */
#define V4L2_BUF_FLAG_QUEUED 0x0002 /* Buffer is queued for processing */
#define V4L2_BUF_FLAG_DONE 0x0004 /* Buffer is ready */
#define V4L2_BUF_FLAG_KEYFRAME 0x0008 /* Image is a keyframe (I-frame) */
#define V4L2_BUF_FLAG_PFRAME 0x0010 /* Image is a P-frame */
#define V4L2_BUF_FLAG_BFRAME 0x0020 /* Image is a B-frame */
/* Buffer is mapped (flag) */
#define V4L2_BUF_FLAG_MAPPED 0x00000001
/* Buffer is queued for processing */
#define V4L2_BUF_FLAG_QUEUED 0x00000002
/* Buffer is ready */
#define V4L2_BUF_FLAG_DONE 0x00000004
/* Image is a keyframe (I-frame) */
#define V4L2_BUF_FLAG_KEYFRAME 0x00000008
/* Image is a P-frame */
#define V4L2_BUF_FLAG_PFRAME 0x00000010
/* Image is a B-frame */
#define V4L2_BUF_FLAG_BFRAME 0x00000020
/* Buffer is ready, but the data contained within is corrupted. */
#define V4L2_BUF_FLAG_ERROR 0x0040
#define V4L2_BUF_FLAG_TIMECODE 0x0100 /* timecode field is valid */
#define V4L2_BUF_FLAG_PREPARED 0x0400 /* Buffer is prepared for queuing */
#define V4L2_BUF_FLAG_ERROR 0x00000040
/* timecode field is valid */
#define V4L2_BUF_FLAG_TIMECODE 0x00000100
/* Buffer is prepared for queuing */
#define V4L2_BUF_FLAG_PREPARED 0x00000400
/* Cache handling flags */
#define V4L2_BUF_FLAG_NO_CACHE_INVALIDATE 0x0800
#define V4L2_BUF_FLAG_NO_CACHE_CLEAN 0x1000
#define V4L2_BUF_FLAG_NO_CACHE_INVALIDATE 0x00000800
#define V4L2_BUF_FLAG_NO_CACHE_CLEAN 0x00001000
/* Timestamp type */
#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
#define V4L2_BUF_FLAG_TIMESTAMP_MASK 0x0000e000
#define V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN 0x00000000
#define V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC 0x00002000
#define V4L2_BUF_FLAG_TIMESTAMP_COPY 0x00004000
/**
* struct v4l2_exportbuffer - export of video buffer as DMABUF file descriptor