On Wed, 25 Jan 2012, Laurent Pinchart wrote:
> The function returns the minimum size of an image for a given number of
> bytes per line (as per the V4L2 specification), width and format.
>
> Signed-off-by: Laurent Pinchart <[email protected]>
> ---
> drivers/media/video/soc_mediabus.c | 18 ++++++++++++++++++
> include/media/soc_mediabus.h | 2 ++
> 2 files changed, 20 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/media/video/soc_mediabus.c
> b/drivers/media/video/soc_mediabus.c
> index a707314..3f47774 100644
> --- a/drivers/media/video/soc_mediabus.c
> +++ b/drivers/media/video/soc_mediabus.c
> @@ -397,6 +397,24 @@ s32 soc_mbus_bytes_per_line(u32 width, const struct
> soc_mbus_pixelfmt *mf)
> }
> EXPORT_SYMBOL(soc_mbus_bytes_per_line);
>
> +s32 soc_mbus_image_size(u32 bytes_per_line, u32 height,
> + const struct soc_mbus_pixelfmt *mf)
What do you think about making mf the first parameter? :-)
> +{
> + if (mf->layout == SOC_MBUS_LAYOUT_PACKED)
> + return bytes_per_line * height;
> +
> + switch (mf->packing) {
> + case SOC_MBUS_PACKING_2X8_PADHI:
> + case SOC_MBUS_PACKING_2X8_PADLO:
> + return bytes_per_line * height * 2;
> + case SOC_MBUS_PACKING_1_5X8:
> + return bytes_per_line * height * 3 / 2;
Hm, confused. Why have you decided to calculate the size based on packing
and not on layout?
Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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