This flag is to be set together with V4L2_BUF_FLAG_DONE. It is intended to indicate streaming errors that might have resulted in corrupted video data in the buffer, but the buffer can still be reused and the streaming may continue.
Setting this flag and returning 0 is different from returning EIO. The latter should now indicate more serious (unrecoverable) errors. This patch also solves a problem with the ioctl handling code in vl42-ioctl.c, which does not copy buffer identification data back to the userspace when EIO is returned, so there is no way for applications to discover on which buffer the operation failed. Signed-off-by: Pawel Osciak <[email protected]> --- include/linux/videodev2.h | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h index 3c26560..1ae1568 100644 --- a/include/linux/videodev2.h +++ b/include/linux/videodev2.h @@ -550,6 +550,9 @@ struct v4l2_buffer { #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 ready, but the data contained within is corrupted. + * Always set together with V4L2_BUF_FLAG_DONE (for backward compatibility). */ +#define V4L2_BUF_FLAG_ERROR 0x0040 #define V4L2_BUF_FLAG_TIMECODE 0x0100 /* timecode field is valid */ #define V4L2_BUF_FLAG_INPUT 0x0200 /* input field is valid */ -- 1.7.0.31.g1df487 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
