From 939f1377fbdb5d0d6d6ee1e234b8ab9328ca77ef Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Sun, 25 Aug 2013 14:00:43 -0300 Subject: [PATCH] [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 Acked-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- Documentation/DocBook/media/v4l/io.xml | 30 ++++++++++---------- include/uapi/linux/videodev2.h | 38 ++++++++++++++++---------- 2 files changed, 38 insertions(+), 30 deletions(-) diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml index 89544e4495a9..5a2e97bbc6bf 100644 --- a/Documentation/DocBook/media/v4l/io.xml +++ b/Documentation/DocBook/media/v4l/io.xml @@ -990,7 +990,7 @@ should set this to 0. V4L2_BUF_FLAG_MAPPED - 0x0001 + 0x00000001 The buffer resides in device memory and has been mapped into the application's address space, see for details. Drivers set or clear this flag when the @@ -1000,7 +1000,7 @@ Drivers set or clear this flag when the V4L2_BUF_FLAG_QUEUED - 0x0002 + 0x00000002 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. V4L2_BUF_FLAG_DONE - 0x0004 + 0x00000004 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 VIDIOC_QUERYBUF ioctl @@ -1027,7 +1027,7 @@ state, in the application domain to say so. V4L2_BUF_FLAG_ERROR - 0x0040 + 0x00000040 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. V4L2_BUF_FLAG_KEYFRAME - 0x0008 + 0x00000008 Drivers set or clear this flag when calling the VIDIOC_DQBUF 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. V4L2_BUF_FLAG_PFRAME - 0x0010 + 0x00000010 Similar to V4L2_BUF_FLAG_KEYFRAME this flags predicted frames or fields which contain only differences to a previous key frame. V4L2_BUF_FLAG_BFRAME - 0x0020 + 0x00000020 Similar to V4L2_BUF_FLAG_PFRAME this is a bidirectional predicted frame or field. [ooc tbd] V4L2_BUF_FLAG_TIMECODE - 0x0100 + 0x00000100 The timecode field is valid. Drivers set or clear this flag when the VIDIOC_DQBUF ioctl is called. V4L2_BUF_FLAG_PREPARED - 0x0400 + 0x00000400 The buffer has been prepared for I/O and can be queued by the application. Drivers set or clear this flag when the VIDIOC_QUERYBUF, V4L2_BUF_FLAG_NO_CACHE_INVALIDATE - 0x0800 + 0x00000800 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. V4L2_BUF_FLAG_NO_CACHE_CLEAN - 0x1000 + 0x00001000 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. V4L2_BUF_FLAG_TIMESTAMP_MASK - 0xe000 + 0x0000e000 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. V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN - 0x0000 + 0x00000000 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. V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC - 0x2000 + 0x00002000 The buffer timestamp has been taken from the CLOCK_MONOTONIC clock. To access the same clock outside V4L2, use @@ -1121,7 +1121,7 @@ in which case caches have not been used. V4L2_BUF_FLAG_TIMESTAMP_COPY - 0x4000 + 0x00004000 The CAPTURE buffer timestamp has been taken from the corresponding OUTPUT buffer. This flag applies only to mem2mem devices. diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 27fedfe4f33b..cb838765dd40 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -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 -- 2.30.2