On 09/15/2011 08:37 AM, Scott Jiang wrote:
>>
>>> +
>>> +#define CAPTURE_DRV_NAME "bfin_capture"
>>> +#define BCAP_MIN_NUM_BUF 2
>>> +
>>> +struct bcap_format {
>>> + u8 *desc;
>>> + u32 pixelformat;
>>> + enum v4l2_mbus_pixelcode mbus_code;
>>> + int bpp; /* bytes per pixel */
>>
>> Don't you think you might have to process 12 bpp formats at some point,
>> like YUV 4:2:0, or NV12? Maybe better calculate in bits from the beginning?
>>
> I have a question here. How to calculate bytesperline for planar format?
> According to v4l2 specification width, height and bytesperline apply
> to largest plane.
> Does it mean bytesperline equal to Y plane distance between two line?
For planar formats - I think so.
> And so you can't use bytesperline x height to calculate sizeimage?
No, you can't. Please see this thread:
http://www.mail-archive.com/linux-media@xxxxxxxxxxxxxxx/msg28957.html
Regards,
--
Sylwester Nawrocki
Samsung Poland R&D Center
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