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This patch adds simple helper function to compute the extended statistics buffer size, exactly the same as for extended parameters, except that it uses the `v4l2_isp_stats_block_header` structure definition to prevent conflict with the `v4l2_isp_params_block_header` one. Signed-off-by: Antoine Bouyer --- include/media/v4l2-isp.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/media/v4l2-isp.h b/include/media/v4l2-isp.h index f3a6d0edcb24..d0a265162440 100644 --- a/include/media/v4l2-isp.h +++ b/include/media/v4l2-isp.h @@ -27,6 +27,19 @@ struct vb2_buffer; #define v4l2_isp_params_buffer_size(max_params_size) \ (offsetof(struct v4l2_isp_params_buffer, data) + (max_params_size)) +/** + * v4l2_isp_stats_buffer_size - Calculate size of v4l2_isp_stats_buffer + * @max_stats_size: The total size of the ISP statistic blocks + * + * Users of the v4l2 extensible statistics will produce differing sized data + * arrays depending on their specific ISP blocks. Drivers and userspace will + * need to be able to calculate the appropriate size of the structure to + * accommodate all ISP statistics blocks provided by the driver. + * This macro provides a convenient tool for the calculation. + */ +#define v4l2_isp_stats_buffer_size(max_stats_size) \ + (offsetof(struct v4l2_isp_stats_buffer, data) + (max_stats_size)) + /** * v4l2_isp_params_validate_buffer_size - Validate a V4L2 ISP buffer sizes * @dev: the driver's device pointer -- 2.52.0